Patent Application
20200012037
This U.S. non-provisional patent application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2018-0079417, filed on Jul. 9, 2018, the entire contents of which are hereby incorporated by reference.
The present disclosure herein relates to a display device, and more particularly, to a display device having a light guide plate.
Display devices are widely used in various electronic devices. Such display devices may include a plurality of thin film transistors for turning on/off of a voltage for each pixel thereof.
As some type of display panels used in display devices are not capable of producing their own light, display devices may include a light source for providing light to the display panel. The light source may include a light emitting element and a light guide plate. The light source may produce the light while the light guide plate may carry the light produced by the light source and distribute it evenly across the entire display panel.
However, conventional light guide plates might not provide an even distribution of light across the entire display panel and this might lead to bright spots and/or dark spots on the image display thereof. In particular, as light is directed from the light source to the light guide plate, some of this light may enter the light guide plate at an angle that causes the light to take an undesirable path through the light guide plate and this may result in light leakage from the light guide plate, which may in turn contribute to bright and/or dark spots in the display device.
A display device includes a display panel. A light source is configured to output light having a first color. A light guide plate is disposed below the display panel and includes an incident surface into which the first color light is incident, an opposite surface that is opposite to the incident surface, and an emission surface facing the display panel. A color convertor is disposed between the display panel and the light guide plate. The color convertor is configured to absorb the first color light and to output light having a color different from the first color to the display panel. A reflector is disposed below the light guide plate. A first reflection area and a second reflection area adjacent to the first reflection area are defined on the reflector. A light absorber is disposed on the first reflection area adjacent to the light source. The light absorber is configured to absorb the first color light.
A display device includes a display panel. A first light source is configured to output a first color light. A second light source is configured to output the first color light. A light guide plate is disposed below the display panel and includes an incident surface facing the first light source, an opposite surface facing the second light source, and an emission surface facing the display panel. A color convertor is disposed between the display panel and the light guide plate and is configured to absorb the first color light from the first light source and the second light source and to output light having a color different from the first color to the display panel. A reflector is disposed below the light guide plate. On the reflector, a first reflection area, a second reflection area, and a third reflection area facing the first reflection area with the second reflection area therebetween are defined. A first light absorber is disposed on the first reflection area adjacent to the first light source and configured to absorb the first color light. A second light absorber is disposed on the third reflection area adjacent to the second light source and is configured to absorb the first color light.
A display device include a display panel. A light source is configured to output a first color light. A light guide plate is disposed below the display panel and includes an incident surface into which the first color light is incident, an opposite surface that is opposite to the incident surface, and an emission surface facing the display panel. A reflector is disposed below the light guide plate. A light absorber is disposed on one area of the reflector adjacent to the light source and is configured to absorb the first color light.
The accompanying drawings are included to provide a further understanding of the inventive concept, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the inventive concept and, together with the description, serve to explain principles of the inventive concept. In the drawings:
In describing exemplary embodiments of the present disclosure illustrated in the drawings, specific terminology is employed for sake of clarity. However, the present disclosure is not intended to be limited to the specific terminology so selected, and it is to be understood that each specific element includes all technical equivalents which operate in a similar manner.
In this specification, it will also be understood that when one component (or region, layer, portion) is referred to as being ‘on’, ‘connected to’, or ‘coupled to’ another component, it can be directly disposed/connected/coupled on/to the one component, or an intervening third component may also be present.
Like reference numerals may refer to like elements throughout the specification and drawings.
It will be understood that although the terms such as ‘first’ and ‘second’ are used herein to describe various elements, these elements should not be limited by these terms. The terms are only used to distinguish one component from other components. For example, a first element referred to as a first element in one embodiment can be referred to as a second element elsewhere in the specification without departing from the scope of the present disclosure. The terms of a singular form may include plural forms unless referred to the contrary.
Hereinafter, exemplary embodiments of the inventive concept will be described with reference to the accompanying drawings.
Referring to
A front surface (or a top surface) and a rear surface (or a bottom surface) of each member or unit, which will be described below, are distinguished by the third direction DR3. However, the first to third directions DR1, DR2, and DR3 shown in the figures may be exemplary, and directions indicated by the first to third directions DR1, DR2, and DR3 may be changed into opposite directions.
According to an exemplary embodiment of the inventive concept, although the display surface DD-IS has a rectangular shape in
For example, the display surface DD-IS may include a first side extending in the first direction DR1, a second side extending in the second direction DR2, a third side extending in the first direction to face the first side, and a fourth side extending in the second direction DR2 to face the second side on the plane. Also, the display surface DD-IS includes a first curve connecting the first side to the second side, a second curve connecting the second side to the third side, a third curve connecting the third side to the fourth side, and a fourth curve connecting the fourth side to the first side. The first to fourth curves may correspond to corners of the display surface DD-IS, respectively.
According to an exemplary embodiment of the present invention, although the display device DD having the planar display surface is illustrated, the inventive concept is not limited thereto. The display device DD may include a curved display surface or a solid display surface. The solid display surface may include a plurality of display areas extending in different directions. For example, the solid display surface may include a polygonal column-type display surface.
The display device DD, according to an exemplary embodiment, may be a rigid display device. However, the inventive concept is not limited thereto. For example, the display device DD, according to exemplary embodiments of the inventive concept, may be a flexible display device. The display device DD that is capable of being applied to a mobile terminal is exemplarily illustrated. Electronic modules, a camera module, a power module, and the like, which are mounted on a main board, may be disposed on a bracket/case together with the display device DD to constitute the mobile terminal. The display device DD, according to an exemplary embodiment of the inventive concept, may be applied to large-sized electronic devices such as televisions and monitors and small and middle-sized electronic devices such as tablet PC, navigation units for vehicles, game consoles, and smart watches and other wearables.
The display surface DD-IS includes a display area DD-DA on which an image IM is displayed and a non-display area DD-NDA that is adjacent to the display area DD-DA. The non-display area DD-NDA may be an area on which an image is not displayed.
As illustrated in
Referring to
The window member 100 may include a light transmitting area TA that transmits an image provided from the display panel DP and a light blocking area CA which is disposed adjacent to the light transmitting area TA and through which the image is not transmitted. The light transmitting area TA and the light blocking area CA may correspond to the display area DD-DA and the non-display area DD-NDA of the display device DD of
The light transmitting area TA is disposed on a central portion of the display device DD on a plane defined in the first and second directions DR1 and DR2. The light blocking area CA has a frame shape that is disposed adjacent to the light transmitting area TA to at least partially surround the light transmitting area TA. However, the inventive concept is not limited thereto. For example, the light blocking area CA may be adjacent to only a portion of the light transmitting area TA or may be omitted. The window member WM may be made of glass, sapphire, plastic, or another suitably transparent material.
The display panel DP is disposed below the window member WM. The display panel DP displays an image by using light provided from the backlight BLU. For example, the display panel DP may be a light-receiving type display panel. For example, according to an exemplary embodiment of the inventive concept, the display panel DP includes a liquid crystal display panel.
The display panel DP includes a display area DA and a non-display area NDA adjacent to the display area DA on the plane. The display area DA and the non-display area NDA of
The backlight BLU is disposed below the display panel DP to provide light to the display panel DP. Accordingly, the backlight BLU may be an edge-type light source that is disposed adjacent to a side surface of a light guide plate LGP.
The backlight BLU may include a light source LS, a light guide plate LGP, a color convertor LM, a reflector RS, and a mold frame MM.
The light source LS is disposed adjacent to one surface of the light guide plate LGP in the first direction DR1. However, the inventive concept is not limited to the position of the light source LS. For example, the light source LS may be disposed adjacent to at least one surface of side surfaces of the light guide plate LGP.
The light source LS includes a plurality of light emitting elements LSU and a circuit substrate LSS. The light emitting elements LSU generate light to be provided to the display panel DP to provide the generated light to the light guide plate LGP.
Accordingly, the light emitting elements LSU may generate a first light. The first light may have a first wavelength band. For example, the first wavelength band may range from about 400 am to about 500 nm. For example, the first light may be blue light.
Each of the light emitting elements LSU may have a shape in which a light emitting diode (LED) is used as a point light source. However, the inventive concept is not limited to the kind of light emitting elements LSU.
Also, the inventive concept is not limited to the number of light emitting elements LSU. According to an exemplary embodiment of the inventive concept, the light emitting elements LSU might not be provided in plurality but be provided as a single point light source using the LED. Alternatively, the light emitting elements LSU may be provided as a plurality of LED groups.
The light emitting elements LSU may be mounted on the circuit substrate LSS. The circuit substrate LSS is disposed to face the one side of the light guide plate LGP in the first direction DR1 and extend in the second direction DR2.
The circuit substrate LSS may include a light source controller connected to the light emitting elements LSU. The light source controller may analyze an image displayed on the display panel DM to output a local dimming signal and control luminance of light generated by the light emitting elements LSU in response to the local dimming signal.
The light guide plate LGP may be disposed below the display panel DP. The light guide plate LGP may include a material having high light transmittance in a visible light range. For example, the light guide plate LGP may include a glass material. According to an exemplary embodiment, the light guide plate LGP may be made of a transparent polymer resin such as polymethyl methacrylate (PMMA). According to an exemplary embodiment of the inventive concept, the light guide plate LGP may have a refractive index of about 1.4 to about 1.55.
The color convertor LM may be disposed between the display panel DP and the light guide plate LGP. The color convertor LM may have a bottom surface contacting a top surface of the light guide plate LGP. The color convertor LM may absorb first color light emitted from the light guide plate LGP in a direction of the display panel DP and may emit light having a different color from the first color. According to an exemplary embodiment, the color convertor LM may absorb first color light having a blue color and may emit white light. As a result, the display panel DP may receive the white light emitted from the color convertor LM.
The reflector RS may be disposed below the light guide plate LGP. The reflector RS reflects the light emitted to a lower side of the light guide plate LGP so that the light is emitted upward. The reflector RS includes a light reflective material. For example, the reflector RS may include aluminum or silver. For example, the reflector RS may be provided as a reflection sheet.
The backlight BLU may further include at least one optical sheet disposed between the color convertor LM and the display panel DP. When the optical sheet is provided in plurality, the plurality of optical sheets may include a diffusion sheet, a prism sheet, and a protection sheet. The diffusion sheet may diffuse the light provided from the color convertor LM. The prism sheet may be disposed above the diffusion sheet to collect the light diffused by the diffusion sheet in an upward direction perpendicular to the plane. The protection sheet may protect prisms of the prism sheet against external friction. The inventive concept is not limited by the kind and number of sheets.
The mold frame MM is disposed between the display panel DP and the color convertor LM. Where the display device DD includes the above-described optical sheets, the mold frame MM may be disposed between the optical sheets and the color convertor LM.
The mold frame MM may have a frame shape. For example, the mold frame MM may be disposed to correspond to an edge area on a top surface of the cover convertor LM. In this case, the mold frame MM might not overlap the display area DA. The display panel DP is disposed on the mold frame MM. The mold frame MM fixes the display panel DP and the backlight BLU.
The accommodation frame BC may be disposed on the lowermost end of the display device DD to accommodate the backlight BLU. The accommodation frame BC includes a bottom part US and a plurality of sidewalls Sz connected to the bottom part US. According to an exemplary embodiment of the inventive concept, the light source LS may be disposed on one inner surface of the plurality of sidewalls Sz of the accommodation frame BC. The accommodation frame BC may be made of a rigid metal material.
Reterring to
The light guide plate LGP may include a plurality of light emitting patterns disposed on the emission surface TS or a bottom surface thereof. The light emitting patterns may refract light incident into the emission surface TS or the bottom surface of the light guide plate LGP to change a reflection angle. The light emitting patterns may have an embossed or depressed shape on the emission surface TS or the bottom surface.
As illustrated in
The low-refractive index layer RO is disposed on the emission surface TS of the light guide plate LGP. According to an exemplary embodiment, the low-refractive index layer RO has a refractive index that is less than that of the light guide plate LGP. For example, the low-refractive index layer RO may have a refractive index of about 1.1 to about 1.3 and a thickness of about 0.5 μm or more. As described above, since the light guide plate LGP has a refractive index of about 1.4 to about 1.55, the light guide plate LGP may have a refractive index that is greater than that of the low-refractive index layer RO.
Light provided from the light source LS to the light guide plate LGP is totally reflected within the light guide plate LGP due to a difference in refractive index between the low-refractive index layer RO and the light guide plate LGP on an interface between the low-refractive index layer RO and the light guide plate LGP. For example, the light incident into the incident surface IS of the light guide plate LGP may be totally reflected to be transmitted up to the opposite surface OS of the light guide plate LGP.
Although the low-refractive index layer RO is disposed on an entire surface of the emission surface TS of the light guide plate LGP, the inventive concept is not limited thereto. For example, the low-refractive index layer RO is disposed to overlap a portion of the emission surface TS of the light guide plate LGP. For example, a top surface of the low-refractive index layer RO has a surface area that is less than that of the emission surface TS of the light guide plate LGP.
The light conversion layer LO is disposed on the low-refractive index layer RO. The light conversion layer LO has a refractive index greater than that of the light guide plate LGP. For example, the light conversion layer LO may have a refractive index of about 1.65 or more.
The light conversion layer LO may convert a wavelength band of the incident light. The light conversion layer LO, according to an exemplary embodiment of the inventive concept, may include a plurality of light conversion particles of different types. These light conversion particles may be, for example, quantum dots QD1 and QD2. Each of the quantum dots QD1 and QD2 may absorb at least a portion of the incident light to emit light having a particular color or transmit the light as it is.
When light incident into the light conversion layer LO has sufficient energy for exciting the quantum dots QD1 and QD2, the quantum dots QD1 and QD2 may absorb at least a portion of the incident light and may then be excited and may emit light having a particular color as they relax from the excited state. When the incident light has a color that is difficult to excite the conversion particles, the incident light may pass through the light conversion layer LO as it is and thus will be visible to the outside in its original form.
For example, light emitted by the quantum dots QD1 and QD2 may be converted to a color that is determined according to a size of each of the quantum dots QD1 and QD2. For example, as each of the particles increases in size, light having a longer wavelength is generated. Also, as each of the particles decreases in size, light having a shorter wavelength is generated.
Light emitted from the quantum dots QD1 and QD2 of the light conversion layer LO may be emitted in various directions.
For example, the quantum dots QD1 and QD2 may include first quantum dots QD1 and second quantum dots QD2. Each of the first quantum dots QD1 may absorb the first color light to convert the first color light into light having a first conversion color having a second wavelength band. The second wavelength band has a center wavelength greater than that of the first wavelength band. For example, the second wavelength band may range of about 640 nm to about 780 nm. For example, each of the first quantum dots QD1 may substantially convert blue light into red light.
Each of the second quantum dots QD2 may absorb the first color light to convert the first color light into light having a second conversion color having a third wavelength band. The third wavelength band has a center wavelength greater than that of the first wavelength band and less than that of the second wavelength band. For example, the third wavelength band may range of about 480 nm to about 560 nm. For example, each of the second quantum dots QD2 may substantially convert blue light into green light.
As described above, the light generated by the corresponding conversion particles may be determined in wavelength according to a size of each of the quantum dots QD1 and QD2. Each of the first quantum dots QD1 may have a size greater than that of each of the second quantum dots QD2.
The light conversion layer LO may further include scatterers. The scatterers may have a form that is a mixture of the first quantum dots QD1 and the second quantum dots QD2.
Referring to
For example, referring to
According to an exemplary embodiment of the inventive concept, the reflector RS includes a first reflection area RA and a second reflection area RA2 adjacent to the first reflection area RA1. On the plane, the first reflection area RA1 may be closer to the incident surface IS of the light guide plate LGP than the second reflection area RA2, and the second reflection area RA2 may be closer to the opposite surface OS of the light guide plate LGP than the first reflection area RA1. An end of the first reflection area RA1 may correspond to the first end S of the reflector RS.
Also, on the plane of the reflector RS, the second reflection area RA2 has a surface area greater than that of the first reflection area RA1. As illustrated in
According to an exemplary embodiment of the inventive concept, the display device DD may further include a light absorber OM disposed on the reflector RS. According to an exemplary embodiment, the light absorber OM may include a plurality of printed patterns PN1, PN2, and PN3 disposed on the first reflection area RA1. For example, the printed patterns PN1, PN2, and PN3 may be disposed on the first reflection area RA1 of the reflector RS in an ink type.
The printed patterns PN1, PN2, and PN3 may have a second color that is different from the first color to absorb the first color light emitted from the light emitting element LSU. The second color may be a yellow color having a wavelength band of about 570 nm to about 590 nm. As a result, the first color light transmitted to the first reflection area RA1 through the bottom surface BS of the light guide plate LGP may be absorbed by the printed patterns PN1, PN2, and PN3 and thus might not be reflected again to the bottom surface BS of the light guide plate LGP.
The printed patterns PN1, PN2, and PN3 include first printed patterns PN1, second printed patterns PN2, and third printed patterns PN3. However, the inventive concept is not limited thereto. For example, the printed patterns may include a plurality of printed patterns arranged in the first direction DR1.
According to exemplary embodiments of the inventive concept, the first printed patterns PN1 of the printed patterns PN1, PN2, and PN3 may be closest to the light emitting element LSU in the first direction DR1. The first printed patterns PN1 may have the same size and may be arranged at a predetermined interval in the second direction DR2.
The second printed patterns PN2 of the printed patterns PN1, PN2, and PN3 may be spaced further from the light emitting element LSU than the first printed patterns PN1 on the plane in the first direction DR1. The second printed patterns PN2 may have the same size and be arranged at a predetermined interval in the second direction DR2.
The third printed patterns PN3 of the printed patterns PN1, PN2, and PN3 may be spaced further from the light emitting element LSU than the second printed patterns PN2 on the plane in the first direction DR1. The third printed patterns PN3 may have the same size and be arranged at a predetermined interval in the second direction DR2.
Hereinafter, structures of the first to third printed patterns PN1, PN2, and PN3 disposed on the reflector RS will be described in more detail with reference to
As illustrated in
According to exemplary embodiments of the inventive concept, the first to third printed patterns PN1, PN2, and PN3 may have surface areas different from each other on the plane of the reflector RS. For example, each of the first printed patterns PN1 may have a surface area greater than that of each of the second printed patterns PN2. Each of the second printed patterns PN2 may have a surface area greater than that of each of the third printed patterns PN3.
According to exemplary embodiments of the inventive concept, a distance between each of the first printed patterns PN and each of the second printed patterns PN2 in the first direction DR1 is defined as a first spaced distance Ds1, and a distance between each of the second printed patterns PN2 and each of the third printed patterns PN3 is defined as a second spaced distance Ds2. In this case, the first spaced distance Ds1 may be less than the second spaced distance Ds2.
According to exemplary embodiments of the inventive concept, the first to third printed patterns PN1, PN2, and PN3 may be arranged at a predetermined interval Dw in the second direction DR2. However, the inventive concept is not limited thereto. For example, the structure in which the first to third printed patterns PN1, PN2, and PN3 are arranged in the second direction DR2 may be variously changed.
Referring again to
For example, when an angle between a direction of the light incident into the light guide plate LGP and a normal perpendicular to the top surface of the light guide plate LGP is greater than an angle that is defined as a critical angle, the incident light may be totally reflected from the top surface of the light guide plate LGP. When the direction of the incident light is less than the angle defined as the critical angle, the incident light may pass through the light guide plate LOP. Hereinafter, as described with reference to
For example, first upper incident light LA1 of the light incident from the light source LS into the light guide plate LGP has a first angle A1 with respect to the normal perpendicular to the emission surface TS of the light guide plate LGP. The first angle A1 may be greater than the critical angle. Thus, first upper incident light LA1′ reflected by the emission surface TS of the light guide plate LGP is provided again into the light guide plate LGP.
First lower incident light LA2 of the light incident from the light source LS into the light guide plate LOP has a first angle A1 with respect to the normal perpendicular to the bottom surface BS of the light guide plate LGP. Thus, first lower incident light LA2′ reflected by the bottom surface BS of the light guide plate LGP is provided again into the light guide plate LGP.
First lower incident light LB of the light incident from the light source LS into the light guide plate LGP has a second angle A2 with respect to the normal perpendicular to the bottom surface BS of the light guide plate LGP.
According to an exemplary embodiment in which the printed patterns PN1, PN2, and PN3 are omitted, like the lower incident light LB, light incident at the second angle A2, which is less than the critical angle, into the light guide plate LOP passes through the bottom surface BS of the light guide plate LGP and is then reflected by the reflector RS. In this case, the lower incident light LB reflected by the reflector RS might not be reflected by the emission surface TS of the light guide plate LOP but may pass through the emission surface TS and may then be provided to the light conversion layer LO. As a result, the lower incident light LB that is not guided may be converted in color in the light conversion layer LO and may then be emitted. Thus, light leakage may occur on an edge area of the display panel.
However, according to exemplary embodiments of the inventive concept, the light incident at the second angle A2 into the light guide plate LGP may be absorbed by the printed patterns PN1, PN2, and PN3 disposed on the first reflection area AR1 of the reflector RS, which are adjacent to the light source LS. For example, light incident at an angle, which is less than the critical angle, into the light guide plate LGP may be more likely generated on the first reflection area RA1, which is closer to the light source LS.
Thus, as described with reference to
Referring to
As illustrated in
However, according to exemplary embodiments of the inventive concept, the light incident at the angle, which is less than the critical angle, into the light guide plate LGP may be absorbed into the light absorber OM disposed on the first reflection area RA1 of the reflector RS. Thus, as illustrated in
Referring to
For example, when the printed patterns PN1, PN2, and PN3 disposed on the first reflection area RA1 are omitted, the display panel DP may output light having a first color coordinate PS1. Here, the first color coordinate PS1 may be a reference color coordinate with respect to a target image.
When the printed patterns PN1, PN2, and PN3 disposed on the first reflection area RA1 are provided with only the second color that is a yellow color, the display panel DP may output light having a fifth color coordinate PS5. The fifth color coordinate PS5 may further include a yellow component when compared to the first color coordinate PS1. As a result, when compared to the first color coordinate PS1 that is the reference color coordinate, the yellow color may be further visible from the display panel DP overlapping the first reflection area RA1.
According to an exemplary embodiment of the inventive concept, the printed patterns PN1, PN2, and PN3 may be provided as a color in which at least two colors are mixed. The printed patterns PN1, PN2, and PN3 may include a first color and a second color. For example, the first color may be a blue color, and the second color may be a yellow color.
For example, each of the printed patterns PN1, PN2, and PN3 may be provided as a mixed color of the first color and the second color. In this case, the first color may be provided at a ratio of about 99.9%, and the second color may be provided at a ratio of about 0.1%. As a result, as illustrated in
For example, each of the printed patterns PN1, PN2, and PN3 may be provided as a mixed color of the first color and the second color. In this case, the first color may be provided at a ratio of about 99.95%, and the second color may be provided at a ratio of about 0.05%. As a result, as illustrated in
For example, each of the printed patterns PN1, PN2, and PN3 may be provided as a mixed color of the first color and the second color. In this case, the first color may be provided at a ratio of about 99.98%, and the second color may be provided at a ratio of about 0.02%. As a result, as illustrated in
As described above, according to exemplary embodiments of the inventive concept, a blue component contained in each of the printed patterns PN1, PN2, and PN3 may have a ratio of about 0.02% to about 0.1% when compared to the yellow component. However, this is merely an example, and thus, ratios of the first color and the second color may vary.
For example, referring to
As illustrated in
According to an exemplary embodiment, the first printed area PA1 may be closer to a first end S of the reflector RS than the second printed area PA2 in a first direction DR1. An end of the first printed area PA1 may correspond to a first end S1 of the reflector RS. The second printed area PA2 may be closer to the first end S1 of the reflector RS than the third printed area PA3 in the first direction DR1.
For example, the first printed area PA may have a density greater than that of the second printed area PA2, and the second printed area PA2 may have a density greater than that of the third printed area PA3. For example, a raw material having the second color may be further contained in the first printed area PA1 than the second printed area PA2, and the raw material having the second color may be further contained in the second printed area PA2 than the third printed area PA3.
This arrangement may be used to take into account that the probability that light incident into a light guide plate LGP at an angle less than a critical angle is transmitted to the second printed area PA2 is relatively high when compared to the third printed area PA3, and the probability that the light incident into the light guide plate LGP is transmitted to the first printed area PA1 is relatively high when compared to the second printed area PA2.
As described above, the display panel DP, according to exemplary embodiments of the inventive concept, may output reference light P1 having target brightness on an area overlapping the first reflection area RA1.
Referring to
However, in a structure in which the auxiliary reflector RSt does not entirely overlap the opposite surface OS, a portion of light guided through the incident surface IS may pass through the opposite surface OS. In this case, light having the first color, which passes through the opposite surface OS, is reflected by the other constitute provided in the display device DD and then is transmitted to a display panel DP. As a result, leakage of light having the first color may occur on an area of the display panel DP, which overlaps the opposite surface OS.
However, according to an exemplary embodiment of the inventive concept, as illustrated in
Also, according to exemplary embodiments of the inventive concept, the third reflection area RA3 may have a length of 0 to about 100 mm in the first direction DR1. Thus, the first reflection area RA1 may have a length greater than that of the third reflection area RA3 in the first direction DR1.
Referring to
According to an exemplary embodiment of the inventive concept, the display device DD further includes first sub color convertors LDsa disposed on the first sub reflection area RAs1 and second sub color convertors LDsb disposed on the second sub reflection area RAs2. The first sub color convertors LDsa and the second sub color convertors LDsb may be arranged in the first direction DR. The inventive concept is not limited to the structure in which the first sub color convertors LDsa and the second sub color convertors LDsb are respectively disposed on the first sub reflection area RAs1 and the second sub reflection area RAs2. For example, the structure may be variously changed.
Each of the first sub color convertors LDsa and the second sub color convertors LDsb may include a plurality of phosphors that absorb the first color light to output the second color light. The phosphors contained in each of the first sub color convertors LDsa and the second sub color convertors LDsb, according to exemplary embodiments of the inventive concept, may be provided as YAG phosphors.
Also, at least a portion of the first sub color convertors LDsa may overlap printed patterns PN1, PN2, and PN3 on a plane of the reflector RS. Also, at least a portion of the second sub color convertors LDsb may overlap the printed patterns PN1, PN2, and PN3 on the plane of the reflector RS.
Although the plurality of sub color convertors LD are disposed on the third reflection area RA3 of the reflector RS in
For example, referring to
According to an exemplary embodiment of the inventive concept, the sub color convertor LDz overlapping the entire third reflection area RA3 may be disposed on the reflector RS. For example, a raw material having the second color, which overlaps the entire third reflection area RA3, may be applied to the reflector RS. For example, the raw material having the second color may be provided as a YAG phosphor. For example, a film containing the raw material having the second color, which overlaps the entire third reflection area RA3, may be disposed on the third reflection area RA3 of the reflector RS.
Although the light absorber OMz described with reference to
A display device DD2 of
Referring to
According to an exemplary embodiment of the inventive concept, each of the first light source LS1 and the second light source LS2 may output first color light having a blue color to the light guide plate LGP.
A reflector RS, according to exemplary embodiments of the inventive concept, may be substantially the same as the reflector RS of
Referring to
Each of the first printed patterns PN1, PN2, and PN3 and the second printed patterns PN1a, PN2a, and PN3a may absorb light incident at an angle less than a critical angle into the light guide plate LGP. Also, the first printed patterns PN1, PN2, and PN3 and the second printed patterns PN1a, PN2a, and PN3a may be spaced apart from each other with the second reflection area RA2 interposed therebetween. According to exemplary embodiments of the inventive concept, the first printed patterns PN1, PN2, and PN3 and the second printed patterns PN1a, PN2a, and PN3a may be symmetrical to each other with respect to the second reflection area RA2.
However, the inventive concept is not limited thereto. According to an exemplary embodiment, the first printed patterns PN1, PN2, and PN3 and the second printed patterns PN a, PN2a, and PN3a may be arranged in various manners with the second reflection area RA2 interposed therebetween.
Also, the reflector RS includes first sub color convertors LDsa disposed on a first sub reflection area (see reference symbol RAs1 of
According to exemplary embodiments of the inventive concept, the light leakage may be prevented from occurring on the edge area of the display panel. Therefore, the overall display of the display device may be made more even.
As described above, exemplary embodiment of the present invention have been disclosed in the drawings and the specification. Accordingly, various modifications from the arrangements shown and other equivalent embodiments are also possible within the scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2018-0079417 | Jul 2018 | KR | national |
