Patent Application
20150260892
1. Field of the Invention
The present disclosure relates to a display apparatus, more particular, to a mirror display apparatus having a display function and a reflection function simultaneously.
2. Description of Related Art
For the popularity of Digital video devices, the development of the display technology continues to expand its applications fields, and the development of the display technology gradually moving toward multi-function display devises to realize the intelligent living style so that all kinds of messages may be readily received in daily life.
A mirror device having display function may provide the display and reflection functions at the same time.
If the mirror device having display function is used to replace various types of mirrors used in ordinary life, such as auxiliary mirror for cars, elevator mirror, or dressing mirror, or to replace various types of common display devices, such as smart phones, tablet PCs, or TVs, the features of those devices may be enriched, and may provide the interactions between the display messages and the users.
Currently, the recent mirror display apparatus serve as a mirror while the display area thereof does not display any information, and in those recent mirror display apparatus, the mirror is prepared by depositing a metal thin film on a surface of a transparent glass for reflecting the light irradiates from the outer environment. However, when the metal film serves as a mirror, the high extinction coefficient (K) of metal may lower the transmittance (T) of the display light emitting from the display panel that equipped with the said mirror display, for example, T˜exp(−K/λ), wherein λ is the wavelength of light. As a result, the brightness of the display must be increased in order to compensate the loss of the display brightness that caused by the metal thin film, and to realize a better display quality. However, it is energy-consuming to increase the brightness of the display. In addition, the shielding effect of the metal thin film may fail the electrical function (such as touch function) of components under the metal thin film. Therefore, the use of the metal reflecting film fails to provide an excellent mirror display apparatus with multi-functions.
Therefore, it is desirable to provide a novel mirror display apparatus with excellent reflection function and display function that may increase the reflection rate and increase the transmittance of the display light emitted from the display.
The object of the present invention is to provide a display apparatus comprising a reflecting film, which provides the mirror reflection function. The reflecting film reduces the influence of the transmittance of the display panel, and provides the need of mirror reflecting effect at the same time.
Another object of the present invention is to provide a touch display apparatus. In addition to the excellent display and reflection functions, the touch element provides a touch-control function to operate the display panel.
To achieve the above object, the display apparatus of the present invention comprises: a display panel, a reflecting film disposed above the display panel, wherein the reflecting film has a first transmission axes, wherein a display light is emitted from the display panel in a light-emitting direction, when an ambient light irradiates onto the display apparatus in a direction that different from the light-emitting direction, the ambient light with a polarization direction that different from the first transmission axes is reflected by the reflecting film.
The display apparatus of the present invention further comprises a first polarizing plate having a second transmission axes, wherein an angle between the second transmission axes and the first transmission axes is larger than or equal to 0° and smaller than 90°, and is preferred to be larger than or equal to 0° and smaller than 45°. When an angle between the polarization direction of the display light and the first transmission axes of the reflecting film is 0°, the display light that penetrates through the reflecting film has the maximum light intensity, and the light intensity of the display light that penetrates through the reflecting film decreases while increasing the angle between the polarization direction of the display light and the first transmission axes of the reflecting film.
The display apparatus of the present invention further comprises a second polarizing plate having a third transmission axes, and the third transmission axes substantially perpendicular to the second transmission axes of the first polarizing plate.
According to the display apparatus of the present invention, the ambient light includes a red light (R), a green light (G), and a blue light (B), when a reflecting ratio of the ambient light that reflected by the reflecting film satisfies a range of 0.84<G/B<1.09 and 0.84<R/B<1.06, the reflecting film presents a silver color; and when the reflecting ratio of the ambient light that reflected by the reflecting film satisfies a range of 1.19<G/B<16.82 and 1.19<R/B<23.18, the reflecting film presents a champagne gold color; wherein a wavelength of the red light is 630 nm, a wavelength of the green light is 550 nm, and a wavelength of the blue light is 450 nm.
According to the display apparatus of the present invention, the display panel may be a liquid crystal display panel, an organic light emitting diode display panel, a plasma display panel, or a field emission display panel. When the display panel is the organic light emitting diode display panel or the plasma display panel, the second polarizing plate may not be included in the display apparatus of the present invention.
Moreover, in the display of the present invention, the reflecting film is preferably formed by dielectric reflective film stack (non-metal material), wherein the dielectric reflective film stack is designed to realize the needs for its reflectivity, and is formed by alternately stacking the film with high refractive index and the film with low refractive index. When the number of the stacked films is large, the transmission (T) and the reflectivity of the reflecting film satisfy the following equation (I) and equation (II):
T≈4(NL/NH)2P×NS/NH2 (I)
R≈1-4(NL/NH)2P×NS/NH2 (II)
wherein NL is the refractive index of the film with low refractive index; NH is the refractive index of the film with high refractive index; NS is the refractive index of the substrate; and P is the number of the stacked films.
According to the equation (I) and equation (II), when each film with a high refractive index or a low refractive index is added to the reflecting film, the transmission (T) is decreased in a degree of (NL/NH)2, on the contrast, reflectivity (R) is increased.
Accordingly, the metal thin film of the prior art is replaced by the above-mentioned reflecting film as the reflecting film of the present invention. The reflecting film used in the present invention has a transmission axes and a reflection axes, wherein the transmission axes is perpendicular to the reflection axes. The operation principle of the reflecting film is described with reference of
In addition, to achieve another object of the present invention, a touch display apparatus is provided, which comprises: a display panel, comprising a first polarizing plate; a reflecting film disposed above the display panel, wherein the reflecting film has a first transmission axes, and a protective film disposed above the reflecting film; wherein a display light is emitted from the display panel in a light-emitting direction, when an ambient light irradiates onto the display panel in a direction that different from the light-emitting direction, the ambient light with a polarization direction that different from the first transmission axes is reflected by the reflecting film.
Hereafter, examples will be provided to illustrate the embodiments of the present invention. Other advantages and effects of the invention will become more apparent from the disclosure of the present invention. It should be noted that these accompanying figures are simplified. The quantity, shape and size of components shown in the figures may be modified according to practically conditions, and the arrangement of components may be more complex. Other various aspects also may be practiced or applied in the invention, and various modifications and variations can be made without departing from the spirit of the invention based on various concepts and applications.
With reference to
On the present embodiment, an angle between the second transmission axes of the first polarizing plate 12 and the first transmission axes of the reflecting film 13 is larger or equal to 0°, and smaller than 90°, wherein larger or equal to 0°, and smaller than 45° is preferred, 0° is most preferable, that is the second transmission axes of the first polarizing plate 12 is most preferable perpendicular to the first transmission axes of the reflecting film 13. In this case, the display light emitted from the display element 11 that penetrates through the first polarizing plate 12 has a first polarization direction P1. When the first polarization direction P1 of the display light is parallel to the first transmission axes of the reflecting film 13, the display light with the first polarization direction P1 can penetrate through the reflecting film 13 and enter to the observation side. The intensity of the penetrated display light decreases as the angle between the first transmission axes of the reflecting film 13 and the second transmission axes of the first polarizing plate 13 increases. Therefore, the angle may be designed within the above-mentioned ranges based on the needs. When the angle between the first transmission axes of the reflecting film 13 and the second transmission axes of the first polarizing plate 12 is 0°, the mirror display apparatus may exhibit the maximum brightness.
Furthermore, in the present embodiment, the display panel 11 is a liquid display panel, and the liquid display panel may be any kinds of liquid display panel known in the art, which may comprises a upper substrate, a lower substrate, alignment layer, liquid crystal layer, thin film transistor, backlight modulus, or the like, the present invention is not particular limited. The display panel may be an In-Plane-Switching Liquid Crystal (IPS) or a vertical alignment liquid crystal (VA), which is not particular limited.
Further, in the present embodiment, as shown in
In addition, as shown in
For the mirror display apparatus 100′ shown in
The touch element 15 of the present invention may be any types of touch sensor known in the art, for example, the touch element may be composed by a mono-layer touch thin film or a bi-layer touch thin film. The type of the touch sensing technology may be a resistive touch element, a surface capacitive touch element, a projected capacitive touch element, an electromagnetic touch element, an acoustic touch element, or an infrared touch element. Alternatively, in other embodiments, the touch element 15 and the protective film 14 can be replaced by a Window integrated sensor (WIS), wherein the touch element 15 is formed directly on the protective film 14. The protective film 14 may be a glass plate, or may be a barrier layer with anti-scratching or anti-dirt properties. In the present invention, the disposing area of touch element 15 may be a portion or the whole area of the mirror display apparatus, which depends on the design of the mirror display apparatus.
In the present embodiment, the touch element 15 is disposed above the reflecting film 13 with a gap between them. In other embodiments, the touch element 15 is only required to be disposed above the reflecting film 13, so that the other layers may be inserted between the touch element 15 and the reflecting film 13, or the touch element 15 and the reflecting film 13 may directly contact to each other, which is not limited thereto.
Alternatively, in other embodiments, the touch element 15 and the protective film 14 can be replaced by a Window integrated sensor (WIS).
In the present embodiment, the reflecting film 13 is disposed above the first polarizing plate 12 with a gap between them. However, in other embodiments, the reflecting film 13 is only required to be disposed above the first polarizing plate 12, so that the other layers may be inserted between the reflecting film 13 and the first polarizing plate 12, or the reflecting film 13 and the first polarizing plate 12 may directly contact to each other, which is not limited thereto.
However, in the present embodiment, the reflecting film 13 is disposed between the touch element 15 and the protective film 14, and the touch element 15 is disposed above the first polarizing plate 12 with a gap between them. In other embodiments, the touch element 15 is only required to be disposed above the first polarizing plate 12, so that the other layers may be inserted between the touch element 15 and the first polarizing plate 12, or the touch element 15 and the first polarizing plate 12 may directly contact to each other, which is not limited thereto.
According to the touch mirror display apparatus of Embodiments 2-4 that described above, these touch mirror display apparatus may be bonded by air-bonding method of full lamination. As shown in
In Embodiments 2-4, the touch mirror display apparatus with touch elements are disclosed. These touch mirror display apparatus may function for displaying messages, mirror reflection, and touch-controlling. Therefore, through the operation by the touch function, portions of the mirror display apparatus area may functions for displaying messages, and portions of the mirror display apparatus area may functions for mirror reflection. As shown in
However, in the present embodiment, the touch element 15 is disposed between the reflecting film 13 and the protective film 14, and the reflecting film 13 is disposed above the display panel 11 with a gap between them. In other embodiments, the reflecting film 13 is only required to be disposed above the display panel 11, so that the other layers may be inserted between the reflecting film 13 and the display panel 11, or the reflecting film 13 and the display panel 11 may directly contact to each other, which is not limited thereto.
However, in the present embodiment, the reflecting film 13 is disposed between the touch element 15 and the protective film 14, and the touch element 15 is only required to be disposed above the display panel 11 with a gap therebetween. In other embodiments, the touch element is only required to be disposed above the display panel 11, so that the other layers may be inserted between the touch element 15 and the display panel 11, or the touch element 15 and the display panel 11 may directly contact to each other, which is not limited thereto.
As shown in
Further, according to an embodiment of the present invention, the refracting index NL, and NH of the inner layers of the reflecting film may be adjusted according to their refractive index corresponding to different wavelength, wherein the refractive index NL of the film with low refractive index and the refractive index NH of the film with high refractive index. Therefore, the amounts of the reflected light with different wavelengths may be adjusted, so that the reflecting film may present different colors.
According to an embodiment of the present invention, when a reflecting ratio of the ambient light that reflected by the reflecting film satisfies a range of 0.84<G/B<1.09 and 0.84<R/B<1.06, the reflecting film may presents a silver color, wherein the ambient light includes a red light (R), a green light (G), and a blue light (B), and a wavelength of the red light is 630 nm, a wavelength of the green light is 550 nm, and a wavelength of the blue light is 450 nm.
According to another embodiment of the present invention, when a reflecting ratio of the ambient light that reflected by the reflecting film satisfies a range of 1.19<G/B<16.82 and 1.19<R/B<23.18, the reflecting film may presents a champagne gold color; wherein the ambient light includes a red light (R), a green light (G), and a blue light (B), and a wavelength of the red light is 630 nm, a wavelength of the green light is 550 nm, and a wavelength of the blue light is 450 nm.
The display apparatus provided by the present disclosure has multiple functions such as displaying messages, mirror reflection, and touch-controlling. Therefore, it can be applied in a wide range of fields. For example, the display apparatus of the present disclosure may be applied in any devices including display panel, such as laptops, video cameras, digital cameras, music players, mobile navigation devices, televisions, curve display, flexible display, and the like; or may be applied in any devices having the mirror function. For example, as shown in FIGS. 14-17, the display apparatus 800 provided by the present invention may be applied to cosmetic mirrors, information bulletin walls, car rearview mirrors (800, 800′), and mirrors in the elevator. Therefore, the display apparatus may be applied to provide the functions of mirror reflection and displaying messages at the same time, while the display apparatus can be operated by its touch-controlling function.
Although the present invention has been explained in relation to its embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 103134863 | Oct 2014 | TW | national |
This application claims the benefits of the Taiwan Patent Application Serial Number 103134863, filed on Oct. 7, 2014, the subject matter of which is incorporated herein by reference. This application claims the benefit of filing date of U.S. Provisional Application Ser. No. 61/951,587, entitled “Mirror Display Apparatus” filed Mar. 12, 2014 under 35 USC §119(e)(1).
| Number | Date | Country | |
|---|---|---|---|
| 61951587 | Mar 2014 | US |
