Patent Application
20190158816
The present invention relates to a naked eye stereoscopic image display device or a dual-screen display device of a parallax barrier type.
Hitherto, a naked-eye stereoscopic image display device that allows stereoscopic view without the need of special eyeglasses has been proposed. For example, Japanese Patent Application Laid-Open No. 3-119889 (1991) discloses a stereoscopic image display device. The stereoscopic image display device includes barrier generating means for generating parallax barrier stripes through electronic control using a transmission display element, a display screen disposed behind and away from a position of generating the parallax barrier stripes, and image display means for outputting and displaying a multi-directional image onto the display screen, the multi-directional image including strips for a left image and a right image that are alternately arrayed correspondingly to the parallax barrier stripes during stereoscopic image display.
With the stereoscopic image display device in Japanese Patent Application Laid-Open No. 3-119889 (1991), the parallax barrier stripes are electronically generated, and the shape (number, width, interval of the stripes), the position (phase), the density, or the like of the generated parallax barrier stripes can be freely and variably controlled. Therefore, the stereoscopic image display device can also be used as a two-dimensional image display device. That is, an image display device having both of a stereoscopic image display function and a two-dimensional image display function is achieved.
Further, Japanese Patent Application Laid-Open No. 2001-166259 discloses a naked-eye stereoscopic image display device. The naked-eye stereoscopic image display device includes image display means for alternately disposing and displaying a left-eye image and a right-eye image each having a stripe shape, light-shielding means configured to be capable of moving a position of a light-shielding part that generates a binocular parallax effect by a ¼ pitch of a pitch of the light-shielding part, a sensor that detects a position of a head of an observer, and area-dividing and movement-controlling means for horizontally dividing the light-shielding means into areas and for performing movement control on the light-shielding part of the light-shielding means per divided area in accordance with the position of the head of the observer.
With the stereoscopic image display device in Japanese Patent Application Laid-Open No. 2001-166259, even if the head of the observer is moved to a position shifted from an appropriate viewing position, a right-eye image can he supplied to the right eye of the observer and a left-eye image to the left eye by performing movement control on the light-shielding part and performing display control for controlling a display position of the left-eye image and the right-eye image. With this, the observer can recognize a stereoscopic image at his/her position even if the observer is away from the appropriate viewing position.
However, with the stereoscopic image display devices in Japanese Patent Application Laid-Open No, 3-119889 (1991) and Japanese Patent Application Laid-Open No. 2001-166259, the observer perceives change in luminance in the screen when movement control on the light-shielding part (parallax barrier stripes) aid display control on a left-eye image and a right-eye image are performed in accordance with the motion of the head of the observer. Particularly, frequent switching in the positions of the light-shielding part and of the left-eye image and the right-eye image due to frequent motion of the head of the observer raises a sense of discomfort in the observer.
As a technology to solve such problems, Japanese Patent Application Laid-Open No. 2017-58682 proposes a stereoscopic image display device capable of, even when the observer is moved, continuously having the observer visibly recognize a stereoscopic image while reducing local flickering of luminance that may be visibly recognized as a bright line and a dark line. The stereoscopic image display device in Japanese Patent Application Laid-Open No. 2017-58682 includes a display panel in which a plurality of sub-pixel pairs are horizontally disposed, the plurality of sub-pixel pairs each including two sub-pixels that respectively display right-eye and left-eye images, and a parallax barrier shutter panel including a plurality of sub-apertures capable of being switched between a light-transmission state and a light-shielding state by driving a liquid crystal layer held between two transparent substrates with vertically extending transparent electrodes. The sub-apertures of the parallax barrier shutter panel are horizontally disposed side by side at pitches defined by dividing a reference parallax barrier pitch by N (N is an even number equal to or more than four). The reference parallax barrier pitch is determined on the basis of a predetermined designed observation distance and pitches of the sub-pixel pairs. In the parallax barrier shutter panel, there are a plurality of common drive areas defined by horizontally dividing a display area. The (N·M+N/2) (M is a positive integer) number of transparent electrodes disposed in the common drive area are electrically connected every N number of transparent electrodes. Each of the (N/2) number of transparent electrodes as one group taken out of the N number of transparent electrodes disposed at the end within the common drive area is electrically connected to other M number of transparent electrodes. Further, each of the (N/2) number of transparent electrodes as another group taken out of the N number of transparent electrodes disposed at the end within the common drive area is electrically connected to other (M-1) number of transparent electrodes.
Further, Japanese Patent Application Laid-Open No. 2014-66956 discloses a structure of a parallax barrier shutter panel, in which vertically extending transparent electrodes are provided separately in two layers.
Further, Japanese Patent Application. Laid-Open No: 2015-227991 discloses a structure in which an integrated circuit (IC) that outputs control signals (barrier control signals) for a parallax barrier shutter panel supplies barrier control signals from both ends of transparent electrodes that drive the parallax harrier shutter panel.
In the stereoscopic image display device disclosed in Japanese Patent Application Laid-Open No. 2017-58682, in order to improve display performance during the stereoscopic image display mode, it is effective to increase the value of the above N (dividing number) to increase the number (N·M+N/2) of transparent electrodes to be disposed in the common drive area in the parallax barrier shutter panel. However, Japanese Patent Application Laid-Open No. 2017-58682 does not disclose specific methods for increasing N.
For example, assuming that the pitch of the th-pixel pairs in the display panel is 120 μM, the width of the transparent electrode is 12 μm when. N=10, and the width of the transparent electrode is 8.57 μm when N=14. That is, if N is increased, the width of the transparent electrode, i.e., the width of the sub-aperture, is required to be narrowed. A narrower width of the transparent electrode leads to a higher risk of disconnection in the transparent electrode due to a foreign matter or the like that may be generated during deposition and patterning of the transparent electrode. The barrier control signal is not supplied to a portion beyond a disconnected portion of the transparent electrode once the transparent electrode is disconnected, which may produce a defective panel in which a parallax barrier does not operate correctly. Such a problem also occurs when the pitches of the sub-pixels are reduced for the purpose of achieving higher resolution or downsizing of the stereoscopic image display device,
Further, as in. Japanese Patent Application Laid-Open No. 2015-227991, if the barrier control signal is input into the transparent electrode of the parallax barrier shutter panel from both ends, the barrier control signal can be supplied to the entire transparent electrode even when the transparent electrode is disconnected at one portion. However, in order to employ such a configuration, wiring for the barrier control signals is required to be formed on at least three sides of the panel, which hinders narrowing the frame and downsizing of the panel. Further, if the wiring is extended, influence of static electricity from the periphery of the panel is increased, and a short circuit is therefore prone to occur between wires and between electrodes due to electric discharge inside the panel.
The present invention has an object to provide an image display device capable of reducing defectiveness caused by disconnection of a transparent electrode while narrowing the width of a sub-aperture formed in a parallax barrier shutter panel and suppressing increase of a frame area of the parallax barrier shutter panel.
According to the present invention, an image display device includes a display panel, and a parallax barrier shutter panel. In the display panel, a plurality of sub-pixel pairs are horizontally disposed at predetermined pitches. The plurality of sub-pixel pairs each include two sub-pixels that display different images. In the parallax barrier shutter panel, a plurality of sub-apertures are horizontally disposed. The plurality of sub-apertures are capable of being switched between a light-transmission state and a light-shielding state by driving a liquid crystal layer held between a first transparent substrate and a second transparent substrate with a plurality of vertically extending transparent electrodes. The display panel and the parallax barrier shutter panel are disposed in a stacked manner in the image display device. The first transparent substrate of the parallax barrier shutter panel includes, in a display area, a plurality of lower-layer transparent electrodes disposed below an interlayer insulation film and a plurality of upper-layer transparent electrodes disposed on the interlayer insulation film as the plurality of transparent electrodes. The first transparent substrate of the parallax barrier shutter panel includes, in a first area adjacent to the display area, a wire for inputting a barrier control signal that is output from a drive circuit into the plurality of transparent electrodes. The barrier control signal is for controlling the parallax barrier shutter panel. The first transparent substrate of the parallax barrier shutter panel includes, in a second area adjacent to the display area on an opposite side to the first area with respect to the display area, a common wire for connecting transparent electrodes that receive input of the same barrier control signal among the plurality of transparent electrodes.
According to the present invention, the transparent electrodes of the first transparent substrate receive input of the barrier control signals from both ends. Therefore, even if one of the first transparent electrodes is disconnected, the barrier control signals can be supplied to a portion beyond the disconnected portion, thus allowing the parallax barrier to operate correctly. Further, since the transparent electrodes are provided separately as the lower-layer transparent electrodes and the upper-layer transparent electrodes, the pitches of the transparent electrodes can be reduced. With this, the effective width of the sub-opening of the parallax barrier shutter panel can be reduced. Further, it is only necessary that the pattern of the common wires be disposed only on two sides (the first area and the second area) of the first transparent substrate. Therefore, the frame area of the parallax barrier shutter panel can be prevented from being extended.
These and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.
In the following, preferred embodiments of the present invention will be described. First, an underlying technology thereof will be described.
<Underlying Technology>
Note that, in the description of the underlying technology, the long direction of the drawing sheet of
As illustrated in
The display panel 10 is a matrix display panel. For example, an organic EL panel, a plasma display panel, or a liquid crystal display panel is applicable as the display panel 10. Note that, if a liquid crystal display panel is applied as the display panel 10, the parallax harrier shutter panel 20 may be disposed at the back (the lower side in
An intermediate polarizing plate 16 is provided in front of the transparent substrate 11, and a back polarizing plate 17 is provided on the back of the transparent substrate 12. Further, a backlight 30 is provided at the back of the hack polarizing plate 17. Further, although not shown, an alignment film for aligning the liquid crystal layer 13 in a certain direction is formed on a surface of each of the transparent substrates 11 and 12 on the liquid crystal layer 13 side.
The configuration of the display panel 10 is not limited to the configuration illustrated in
A plurality of sub-pixels 40 are disposed in the display panel 10. Among the sub-pixels 40, sub-pixels 40 that display a right image are hereinafter referred to as “sub-pixels 40a,” and sub-pixels 40 that display a left image as “sub-pixels 40b.” The sub-pixels 40a and the sub-pixels 40b are alternately disposed in the horizontal direction (short direction of FIG.1). A light-shielding wall 18 is provided between the sub-pixel 40a and the sub-pixel 40b. In other words, each of the sub-pixels 40a and 40b is interposed between the light-shielding walls 18.
The width of each of the sub-pixels 40a and 40b is equal or substantially equal. Here, a pair of adjacent sub-pixels 40a and 40b forms a sub-pixel pair 41 that displays two images (a right image and a left image) different on the right and the left. Sub-pixel pairs 41 are arrayed in the display panel 10 in the horizontal direction at regular pitches. Further, the sub-pixel pairs 41 are also arrayed in the vertical direction, not only in the horizontal direction.
In the image display device 1 of
The parallax barrier shutter panel 20 includes two transparent substrates 21 and 22, and a liquid crystal layer 23 held between the two transparent substrates 21 and 23. The transparent substrate 21 that is located on the front side is hereinafter referred to as a “first transparent substrate 21,” and the transparent substrate 22 that is located on the back side as a “second transparent substrate 22.”
A plurality of first transparent electrodes 24 having a strip shape that extends in the vertical direction are formed on a surface of the first transparent substrate 21 on the liquid crystal layer 23 side. Each individual first transparent electrode 24 corresponds to a portion obtained by dividing a transparent electrode within a reference parallax barrier pitch P of a sub-pixel pair 41 into an even number (here, eight). That is, an even number of (here, eight) first transparent electrodes 24 are arrayed within the reference parallax barrier pitch P.
The plurality of first transparent electrodes 24 illustrated in
Referring back to
The first transparent electrode 24 and the second transparent electrode 25 apply an electric field to the liquid crystal layer 23, to thereby drive the liquid crystal layer 23, As a driving mode of the liquid crystal layer 23, Twisted Nematic (TN), Super-Twisted Nematic (STN), In-Plane Switching, Optically Compensated Bend (OCB), or the like can be used.
A display-surface polarizing plate 26 is provided in front of the first transparent substrate 21. Further, a polarizing plate is also provided on the back of the second transparent substrate 22. Here, however, the intermediate polarizing plate 16 of the display panel 10 serves as the polarizing plate. The first transparent substrate 21 is disposed at the front of the second transparent substrate 22 in
Incidentally, a voltage is selectively applied to each of the first transparent electrode 24 and the second transparent electrode 25. Accordingly, the parallax barrier shutter panel 20 can be switched between a light-transmission state and a light-shielding state in the unit of the width of the first transparent electrode 24. In the following description, an optical aperture in the parallax barrier shutter panel 20 that can be switched between a light-transmission state and a light-shielding state in the unit of the first transparent electrode 24 by electrical control is referred to as a “sub-aperture.”
Sub-apertures are formed at positions corresponding to the respective plurality of first transparent electrodes 24. Since eight first transparent electrodes 24 are horizontally arrayed within the reference parallax barrier pitch P in the parallax barrier shutter panel 20 of the image display device 1 of
Although all of the sub-apertures 200 are in a light-transmission state (aperture-open state) in
Next, operation of the image display device 1 will be briefly described. The detector 31 connected to the image display device 1 detects the position (motion) of the observer. The controller 32 controls the state (light-transmission state/light-shielding state) of each sub-aperture 200 of the parallax barrier strutter panel 20 based on a detection result of the detector 31, thereby controlling the position of the integrated aperture 300. That is, when the position of the observer moves right and left, the controller 32 correspondingly moves the integrated aperture 300 in the horizontal direction. As a result, the observer can continue viewing a stereoscopic image even if the observer moves right and left.
In such an image display device 1 as described above, increase in the number of sub-apertures 200 to be provided within the reference parallax barrier pitch P enables finer control of positions where stereoscopic images can be displayed. In order to achieve this, however, a large number of first transparent electrodes 24 need to be provided within the reference parallax barrier pitch P, which requires narrowing the width of the first transparent electrodes 24. However, a narrower width of the first transparent electrodes 24 leads to a higher risk of occurrence of disconnection due to pattern failure of the first transparent electrodes 24. If the first transparent electrode 24 is disconnected, the parallax barrier does not correctly function in an area beyond the disconnected portion.
The overall configuration of an image display device 1 according to a first preferred embodiment of the present invention is similar to that of
Further, in this preferred embodiment, the number of sub-apertures 200, i.e., the number of first transparent electrodes 24, to be provided within a reference parallax barrier pitch P is eight, Note that, the number of sub-apertures 200 to be provided within a reference parallax barrier pitch P is not limited to eight, as long as a plurality of sub-apertures 200 are provided.
As in
Adjacently to the display area Si, an input-side connection area 52 (a first area) is provided, which is an area for connecting the first transparent electrodes 24 to a metal wire. The metal wire in the input-side connection area 52 is a wire for allowing barrier control signals from a drive integrated circuit (IC) 54 to be input into the first transparent electrodes 24. The drive IC 54 is a drive circuit that outputs barrier control signals for controlling the parallax barrier shutter panel 20. Further, in the input-side connection area 52, common wires 201 each for connecting the first transparent electrodes 24 that receive input of the same barrier control signal arc provided. The first transparent electrodes 24 and the common wires 201 are connected by respective connection portions 202.
Further, on the outer side of the input-side connection area 52, a wire area 53 is provided, which is an area for connecting the metal wire in the input-side connection area 52 to the drive IC 54. That is, the first transparent electrodes 24 are electrically connected to the drive IC 54 via the metal wire in the input-side connection area 52 and the wire area 53. With this, a signal (voltage) output by the drive IC 54 can be applied to the first transparent electrodes 24 in the display area 51. Note that, the drive IC 54 receives input of a signal for controlling the position of the integrated aperture 300 from the outside (e.g. the controller 32 illustrated in
A counter-input-side connection area 56 (a second area) is provided adjacently to the display area 51 on the opposite side (the upper side in
In this manner, in the first transparent substrate 21 according to the first preferred embodiment, the first transparent electrodes 24 that receive input of the same barrier control signal are connected by both of the common wire 201 in the input-side connection area 52 and the common wire 204 in the counter-input-side connection area 56. That is, the first transparent electrodes 24 that receive input of the same barrier control signal are connected one another at their both ends.
Further, as illustrated in
Note that, in this preferred embodiment, various wires illustrated in
Here, an area outside of the display area 51 is referred to as a “frame area.” An area where the input-side connection area 52, the wire area 53, the counter-input-side connection area 56, the drive IC 54, and the counter-substrate connection electrode 55 are disposed is included in the frame area.
The lower-layer transparent electrodes 24a are formed on the first transparent substrate 21, and an interlayer insulation film 61 is formed on the lower-layer transparent electrodes 24a. The upper-layer transparent electrodes 24b are formed on the interlayer insulation film 61, and a protective insulation film 62 is formed on the upper-layer transparent electrodes 24b. As in above, the lower-layer transparent electrodes 24a are disposed below the interlayer insulation film 61, and the upper-layer transparent electrodes 24b are disposed on the interlayer insulation film 61. Note that, the protective insulation film 62 on the upper-layer transparent electrodes 24b may be omitted.
Although not shown, an alignment film is formed on the topmost layer a surface on the liquid crystal layer 23 side) of the first transparent substrate 21. Further, an alignment film is also provided on the topmost layer of the second transparent substrate 22.
In
It is desirable that the width of the sub-apertures 200 controlled by the lower-layer transparent electrodes 24a and the width of the sub--apertures 200 controlled by the upper-layer transparent electrodes 24b be equal. In order to achieve this, it is only necessary that the width of the liquid crystal layer 23 driven by the lower-layer transparent electrodes 24a and the width of the liquid crystal layer 23 driven by the upper-layer transparent electrodes 24b be equal. The width of an area where an electric field is generated between the lower-layer transparent electrodes 24a and the second transparent electrode 25 is determined by the interval of the upper-layer transparent electrodes 24b; however, the distance from the second transparent electrode 25 to the lower-layer transparent electrodes 24a is larger than the distance from the second transparent electrode 25 to the upper-layer transparent electrodes 24b. Therefore, narrowing the width of the upper-layer transparent electrodes 24b so as to be slightly smaller than the interval of the upper-layer transparent electrodes 24b can substantially equalize the width of the liquid crystal layer 23 driven by the lower-layer transparent electrodes 24a to the width of the liquid crystal layer 23 driven by the upper-layer transparent electrodes 24b.
As in above, if the first transparent electrodes 24 are disposed separately as the lower-layer transparent electrodes 24a and the upper-layer transparent electrodes 24b, the first transparent electrodes 24 can be disposed so as to be partially overlap one another. With this, the effective width of each first transparent electrode 24 can be reduced, and thus the width of the sub-aperture 200 can be narrowed.
Next, structure of the counter-input-side connection area 56 of the first transparent substrate 21 will be described.
As illustrated in
In this manner, contact holes are not used for the electrical connection between the lower-layer transparent electrode 24a and the lower-layer wire 71 and the electrical connection between the upper-layer transparent electrode 24b and the upper-layer wire 72. It is possible to use contact holes for such connections. In such a case, however, the horizontal width of an area for forming the contact holes needs to be amply secured depending on the precision in size of the contact holes and the precision in positioning of each of the layers. This makes it difficult to reduce the pitches of the lower-layer transparent electrodes 24a and the pitches of the upper-layer transparent electrodes 24b, raising fears that the horizontal width of the input-side connection area 52 may be extended. Further, the horizontal width of the input-side connection area 52 can be prevented from being extended by vertically alternately (in a zigzag manner) disposing the areas for forming the contact holes. This, however, is not preferable because the vertical width may be extended.
Owing to such a configuration as in this preferred embodiment in which contact holes are not used for the connection between the lover-layer transparent electrodes 24a and the lower-layer wires 71 and the connection between the upper-layer transparent electrodes 24b and the upper-layer wires 72, the pitches of the lower-layer transparent electrodes 24a and the pitches of the upper-layer transparent electrodes 24b can be reduced. This can contribute to downsizing and improvement in the degree of freedom in designing of the image display device 1.
Now, one example is given of width and interval for the lower-layer transparent electrode 24a, the upper-layer transparent electrode 24b, the lower-layer wire 71, and the upper-layer wire 72. For example, the width of the upper-layer transparent electrode 24b may be 8.4 μm; the interval between the upper-layer transparent electrodes 24b, 8.6 μm; the width of the upper-layer wire 72, 4.0 μm, the width of the lower-layer transparent electrode 24a, 12.4 μm; and the width of the lower-layer wire 71, 4.0 μm. In this case, assuming that the number of common drive electrodes (the number of the first transparent electrodes 24 within the reference parallax barrier pitch P) is fourteen, the reference parallax barrier pitch P is 119 μm and thus the number of common drive electrodes can be increased even when the reference parallax barrier pitch P is small.
In the first preferred embodiment, the number of the first transparent electrodes 24 (the lower-layer transparent electrodes 24a and the upper-layer transparent electrodes 24b) provided within the reference parallax barrier pitch P is eight, and the first transparent electrodes 24 are driven in common (electrically in common) every eight first transparent electrodes 24. The electrically common first transparent electrodes 24 receive input of the same barrier control signal. Thus, in this preferred embodiment, the first transparent electrodes 24 that receive input of the same barrier control signal are disposed every eight first transparent electrodes 24.
As in
As illustrated in
Note that, although description will be omitted as for the input-side connection area 52 and the wire area 53 illustrated in
In the parallax barrier shutter panel 20 according to the first preferred embodiment, the first transparent electrodes 24 of the first transparent substrate 21 (the lower-layer transparent electrodes 24a and the upper-layer transparent electrodes 24b) receive input of barrier control signals from both ends. Therefore, even if one of the first transparent electrodes 24 is disconnected, barrier control signals can be supplied to a portion beyond the disconnected portion, thus allowing the parallax barrier to operate correctly.
Further, since the first transparent electrodes 24 are provided separately as the lower-layer transparent electrodes 24a and the upper-layer transparent electrodes 24b, the pitches of the first transparent electrodes 24 can be reduced. This can contribute to narrowing the effective width of the sub-aperture of the parallax barrier shutter panel 20, as well as to improvement in display performance of a naked-eye stereoscopic image display device or a dual-screen display device.
Further,it is only necessary that the patterns of the common wires 201 and 204 be disposed only on two sides (the input-side connection area 52 and the counter-input-side connection area 56) of the first transparent substrate 21. Therefore, the frame area of the parallax barrier shutter panel 20 can be prevented from being extended.
[Modification]
In contrast to the configuration of
As illustrated in
The above description is given of a configuration in which the common wires 204 that connect the first transparent electrodes 24 receiving input of the same barrier control signal are disposed on the interlayer insulation film 61. However, the common wires 204 may be disposed below the interlayer insulation film 61 (on the first transparent substrate 21). That is, the common wires 204 may be formed using a metal film in the same layer as the lower-layer wires 71, or may be formed using a transparent conductive film in the same layer as the lower-layer transparent electrodes 24a.
Further,
A material for the lower-layer transparent electrode 24a and the upper-layer transparent electrode 24b is only required to be optically transparent and conductive. Examples of such a material include, but are not limited to, indium zinc oxide (IZO) and indium tin oxide (ITO).
A material for the lower-layer wire 71 and the upper-layer wire 72 need not necessarily he transparent, and is only required to be conductive. A material having higher conductivity than that for the lower-layer transparent electrode 24a and the upper-layer transparent electrode 24b is preferable. Examples of such a material include, but are not limited to, a metal material such as Al, Cu, Ni, Ag, Nd, Mo, Nb, W, Ta, and Ti.
A material for the interlayer insulation film 61 and the protective insulation film 62 is only required to be transparent and electrically insulated. Examples of such a material include, but are not limited to, a SiN film, a SiO film, an inorganic insulation film such as a laminated film of SiN and SiO, and an organic insulation film mainly containing an optically transparent acrylic material.
As illustrated in
Further, at distal ends of the first transparent electrodes 24, cross portions 205 are formed, which are intersecting points where the first transparent electrodes 24 and the common wires 204 sterically intersect each other. When the cross portion 205 is irradiated with a laser, the first transparent electrode 24 and the common wire 204 intersecting at the cross portion 205 can be connected. Note that, the portions in
For example, as in
[Modification]
Also in the second preferred embodiment, the counter-input-side connection area 56 can be formed without using metal wires.
In contrast to the configuration of
The configuration of the counter-input-side connection area 56 illustrated in
Further, connection resistance (connection resistance between the lower-layer wire 71 and the common wire 204) at the repair portion can be stabilized by depositing low-resistance metal, such as tungsten (W), on the repair portion with use of a laser chemical vapor deposition (CVD) repair device or the like during the repair treatment. Examples of a material to be deposited with a laser CVD repair device include, but not limited to, a metal material such as Al, Cu, Ni, Ag, Nd, Mo, Nb, W, Ta, and Ti.
Similarly to the counter-input-side connection area 56, the input-side connection area 52 and the wire area 53 may be formed without using metal wires as well.
Further, as illustrated in
Also in the second preferred embodiment, description is given of a configuration in which the common wires 204 that connect the first transparent electrodes 24 receiving input of the same: barrier control signal are disposed on the interlayer insulation film 61. However, the common wires 204 may be disposed below the interlayer insulation film 61 (on the first transparent substrate 21). That is, the common wires 204 may be formed using a metal film in the same layer as the lower-layer wires 71, or may be formed using a transparent conductive film in the same layer as the lower-layer transparent electrodes 24a. In such a case, a portion where the common wire 204 below the interlayer insulation film 61 and a distal end of the upper-layer wire 72 on the interlayer insulation film 61 sterically intersect each other corresponds to a cross portion. Such holds true for the common wire 201 of the input-side connection area 52.
In the above second preferred embodiment, the common wires 204 disposed in the counter-input-side connection area 56 are not connected to any of the first transparent electrodes 24 (the lower-layer transparent electrodes 24a and the upper-layer transparent electrodes 24b) so as to be floated. In the third preferred embodiment, however, at least one first transparent electrode 24 is connected to each common wire 204.
The first transparent electrodes 24 that are connected to different common wires 204 receive input of different barrier control signals. Thus, each common wire 204 is supplied with a different barrier control signal via at least one first transparent electrode 24. Further, the cross portions 205 irradiated with a laser during a repair treatment are portions where the first transparent electrodes 24 supplied with the same barrier drive signal and the common wires 204 sterically intersect each other.
In the third preferred embodiment, the common wire 204 is connected to at least one first transparent electrode 24. Therefore, for example, if the first transparent electrode 24 is disconnected as in
Also in the third preferred embodiment, the counter-input-side connection area 56 can be formed without using metal wires. Further, the common wires 204 that connect the first transparent electrodes 24 receiving input of the same barrier control signal may be disposed below the interlayer insulation film 61 (on the first transparent substrate 21). The above described matters hold true for the input-side connection area 52 and the wire area 53.
In the above second preferred embodiment, the number of the common wires 204 to be provided in a single common drive area is equal to the number of the barrier control signals. In the fourth preferred embodiment, however, the number of the common wires 204 is smaller than the number of the barrier control signals. That is, the number of the common wires 204 per common drive area is equal to or more than one and equal to or less than the number of the barrier control signals minus one. Further, the common wires 204 are not connected to any of the first transparent electrodes 24 (the lower-layer transparent electrodes 24a or the upper-layer transparent electrodes 24b) so as to be floated.
For example, as in
The number of disconnected wires that can be subjected to a repair treatment is decreased as compared to that of the first to third preferred embodiments since a single disconnected wire can be subjected to a repair treatment per common wire 204. However, the frame area can he narrowed correspondingly to the decreased number of the common wires 204 disposed in the counter-input-side connection area 56.
Further, in this preferred embodiment, which barrier control signal is to be supplied to each of the common wires 204 (which first transparent electrode 24 is to be connected to each of the common wires 204) varies depending on which first transparent electrode 24 is disconnected. Further, the cross portions are located at positions aligned in the length direction of the first transparent electrodes 24 as in
Also in the fourth preferred embodiment, the counter-input-side connection area 56 can be formed without using metal wires. Further, the common wires 204 that connect the first transparent electrodes 24 receiving input of the same barrier control signal may be disposed below the interlayer insulation film 61 (on the first transparent substrate 21). Such holds true for the input-side connection area 52 and the wire area 53.
Note that, in the present invention, each of the preferred embodiments may be freely combined, and each of the preferred embodiments may be modified or omitted as appropriate within the scope of the invention.
While the invention has been shown and described in detail, the foregoing description is in all aspects illustrative and not restrictive. It is therefore understood that numerous modifications and variations can be devised without departing from the scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2017-223522 | Nov 2017 | JP | national |
