CN107884979B

CN107884979B - Display with low reflectivity

Info

Publication number: CN107884979B
Application number: CN201710914951.3A
Authority: CN
Inventors: 郭建新
Original assignee: Huizhou Desay SV Automotive Co Ltd
Current assignee: Huizhou Desay SV Automotive Co Ltd
Priority date: 2017-09-30
Filing date: 2017-09-30
Publication date: 2020-10-16
Anticipated expiration: 2037-09-30
Also published as: CN107884979A

Abstract

The invention discloses a low-reflectivity display, which comprises a front polaroid (1), a first adhesive layer (2), a transparent conductive layer (3) and a filter plate (4), wherein the transparent conductive layer (3) is deposited on the filter plate (4), the front polaroid (1) is adhered to the transparent conductive layer (3) through the first adhesive layer (2), the refractive index of the front polaroid (1) is any value between 1.45 and 1.5, and the thickness of the front polaroid is any value between 25 and 35 mu m; the refractive index of the first adhesive layer (2) is any value between 1.48 and 1.78, and the thickness of the first adhesive layer is any value between 20 and 50 mu m; the refractive index of the transparent conducting layer (3) is any value between 1.95 and 2.05, and the thickness is any value between 30 and 40 nm. The low-reflectivity display disclosed by the invention can improve the picture display effect of the display.

Description

Display with low reflectivity

Technical Field

The invention relates to the technical field of displays, in particular to a display with low reflectivity.

Background

With the development of vehicle display technology, IPS TFT-LCDs with high contrast, wide viewing angle and small color distortion are increasingly widely used in vehicle displays.

Since vehicles are often used in high-brightness environments, the strength of the anti-reflective properties of the display directly affects the user experience. For a display with good anti-reflection performance, the image seen by people is clearer and the color is more bright. However, in a display with poor anti-reflection performance, the image becomes unclear and the color is not vivid. In order to reduce the reflection of the display, various antireflection schemes, such as application of an antireflection film, a circular polarizer, etc., have been developed. The existing optimized antireflection method belongs to an optical full-lamination method, and the method reduces the external reflection of the outer surface of the display, a cover plate, a touch screen and the like to the minimum, reduces the reflectivity of the whole display to some extent and improves the display effect. However, if it is desired to further reduce the reflectance and improve the display effect of the display, the internal reflectance of the display itself is further reduced.

Disclosure of Invention

The invention solves the technical problem of providing a display which improves the display effect by reducing the internal reflectivity of the display.

In order to achieve the purpose, the invention provides a low-reflectivity display, which comprises a front polaroid, a first adhesive layer, a transparent conductive layer and a light filter plate, wherein the transparent conductive layer is deposited on the light filter plate, the front polaroid is adhered on the transparent conductive layer through the first adhesive layer, the refractive index of the front polaroid is any value between 1.45 and 1.5, and the thickness of the front polaroid is any value between 25 micrometers and 35 micrometers; the refractive index of the first adhesive layer is any value between 1.48 and 1.78, and the thickness of the first adhesive layer is any value between 20 and 50 micrometers; the refractive index of the transparent conducting layer is any value between 1.95 and 2.05, and the thickness is any value between 30nm and 40 nm.

The transparent conducting layer is arranged on the light filter plate, and the first refraction layer and the second refraction layer are sequentially deposited on the light filter plate; the refractive index of the first refractive layer is lower than that of the second refractive layer.

Furthermore, the refractive index of the first refractive layer is any value between 1.4 and 1.5, and the thickness is any value between 30nm and 80 nm; the refractive index of the second refraction layer is any value between 1.9 and 2.1, and the thickness of the second refraction layer is any value between 10nm and 30 nm.

Further, the material of the first refraction layer is SiO 2.

Further, the material of the second refraction layer is SiNx, Nb2O5 or ZrO 2.

Further, the first adhesive layer is made of silica gel.

Further, the display device further comprises a driving plate and conductive adhesive, wherein the conductive adhesive electrically connects the transparent conductive layer to the driving plate.

Further, the conductive adhesive is silver paste, and the transparent conductive layer is made of ITO.

The liquid crystal display panel further comprises a sealing rubber frame, liquid crystal molecules and electrodes, wherein a plurality of closed spaces are formed on the filter plate, the sealing rubber frame and the driving plate, the liquid crystal molecules are packaged in the closed spaces, and the two electrodes are arranged on the driving plate in the closed spaces.

Furthermore, the rear polarizer is bonded on the outer surface of the driving plate through the second adhesive layer.

The beneficial effects realized by the invention mainly comprise the following points: through the first adhesive layer with low refractive index and proper thickness, the occurrence of total emission of light inside the display is reduced, the projection of the internal light outside the display is enhanced, and poor display picture caused by the influence of the total emission of the internal light is avoided; the first refraction layer and the second refraction layer are added, so that light rays inside the display are enhanced to be transmitted outside the display, and the picture of the display is improved; the transparent conducting layer and the conducting adhesive are arranged to shield the liquid crystal molecules, so that the influence of electric field interference on the picture of the display by the liquid crystal molecules is avoided.

Drawings

FIG. 1 is a schematic diagram of a low/medium reflectivity display according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a low/medium reflectivity display according to a second embodiment of the present invention;

FIG. 3 is a schematic diagram illustrating the relationship between the reflectivity of the first adhesive layer and the thickness and refractive index of the adhesive layer of a display with a low or medium reflectivity according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a relationship between thicknesses of a first refractive layer and a second refractive layer of a low-middle reflectivity display according to a second embodiment of the present invention and reflectivity thereof.

Description of reference numerals: 1-front polarizer, 2-first adhesive layer, 3-transparent conductive layer, 4-light filter plate, 5-sealing adhesive frame, 6-driving plate, 7-second adhesive layer, 8-rear polarizer, 9-liquid crystal molecule, 10-conductive adhesive, 11-electrode, 12-first refraction layer and 13-second refraction layer.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

In order to facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1, a low-reflectivity display includes a front polarizer 1, a first adhesive layer 2, a transparent conductive layer 3, a filter plate 4, a sealant frame 5, a driving board 6, a second adhesive layer 7, a rear polarizer 8, liquid crystal molecules 9, a conductive adhesive 10, and electrodes 11.

Referring to fig. 1, the sealant frame 5 is disposed between the filter plate 4 and the driving plate 6, the liquid crystal molecules 9 are encapsulated in a closed space formed by the sealant frame 5, the filter plate 4 and the driving plate 6, and the driving plate 6 in the closed space is provided with positive and negative electrodes 11 for controlling the directions of the liquid crystal molecules. The rear polarizer 8 is adhered to the outer surface of the driving plate 6 by a second adhesive layer 7. A transparent conducting layer 3 is deposited on the outer surface of the filter plate 4, and ITO is used as the transparent conducting layer 3; conductive silver paste is used as conductive adhesive 10, the conductive adhesive 10 electrically connects the transparent conductive layer 3 to the driving board 6, so that the transparent conductive layer 3 is grounded, and the liquid crystal molecules 9 are shielded by the transparent conductive layer 3, thereby avoiding the influence of electric field interference on the picture of the display. And selecting a silica gel material as the first adhesive layer 2, wherein the first adhesive layer 2 adheres the front polarizer 1 to the outer surface of the filter plate 4.

The refractive index of the transparent conductive layer 3 which is commonly used at present is any value between 1.95 and 2.05, and the thickness is any value between 30nm and 40 nm; the refractive index of the commonly used front polarizer 1 is any value between 1.45 and 1.5, and the thickness is any value between 25 μm and 35 μm. In this embodiment, a simulation is performed by using a conventional ITO with a refractive index of 2.0 and a thickness of 35nm, a conventional front polarizer 1 with a refractive index of 1.48 and a thickness of 30 μm, and based on the ITO and the front polarizer of the above specification through simulation software, referring to fig. 3, when the thickness of the first adhesive layer 2 is 35 μm and the refractive index is 1.73, the reflectance of the first adhesive layer 2 is the lowest, and the transmittance is the highest; because the first adhesive layer 2 is not simple with 1/4 wavelength, and the whole visible light spectrum range should be considered, further experiments find that the reflectivity is lowest when the thickness of the first adhesive layer 2 is between 20 μm and 50 μm, the reflectivity change caused by the thickness change is very small, the reflectivity of the first adhesive layer 2 is lower when the refractive index of the first adhesive layer 2 is 1.48 to 1.78, the reflectivity of the first adhesive layer 2 is lowest when the refractive index is 1.68, and the reflectivity is increased when the refractive index is greater than or less than 1.68, so that the overall reflectivity formed by the transparent conductive layer 3, the first adhesive layer 2 and the front polarizer 1 is 0.8 to 0.9% at the lowest, which is greatly reduced compared with the existing reflectivity 1.3 to 1.5% of the transparent conductive layer 3 and the front polarizer 1, and the display effect of the display is improved.

Example two

Referring to fig. 2, the difference between the second embodiment and the first embodiment is: a first refraction layer 12 and a second refraction layer 13 are also arranged between the transparent conductive layer 3 and the light filter plate 4, and the material of the first refraction layer 12 is SiO₂The refractive index is between 1.4 and 1.5; the material of the second refractive layer 13 is SiN_x、Nb₂O₅Or ZrO₂The refractive index is between 1.9 and 2.1, and Nb is selected for the embodiment₂O₅As the second refraction layer 13. The rest of the second embodiment is the same as the first embodiment.

In this embodiment, the refractive index of the first refractive layer 12 is 1.46, the refractive index of the second refractive layer 13 is 2.0, and the reflectance of the whole of the first refractive layer 12 and the second refractive layer 13 is simulated through software simulation, referring to fig. 4, it is found through simulation that the reflectance of the whole of the first refractive layer 12 and the second refractive layer 13 is low when the thickness of the first refractive layer 12 is 30nm to 80nm and the thickness of the second refractive layer 13 is 10nm to 30nm, and the reflectance of the whole of the first refractive layer 12 and the second refractive layer 13 is the lowest when the thickness of the first refractive layer 12 is 51nm and the thickness of the second refractive layer 13 is 16 nm. It is found through experiments that the reflectance of the whole of the first and

second refraction layers

12 and 13 combined with the transparent conductive layer 3, the first adhesive layer 2 and the front polarizer 1 can be reduced to 0.2%, which is further reduced than the first embodiment.

The low-reflectivity display of the first embodiment and the second embodiment reduces the total emission of the light inside the display in the display when in work, enhances the projection of the internal light outside the display, and avoids the poor picture of the display caused by the influence of the total emission of the internal light.

The foregoing is a detailed description of the invention, which is described in greater detail and not intended to limit the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications are possible without departing from the inventive concept, and such obvious alternatives fall within the scope of the invention.

Claims

1. A low reflectivity display, comprising: the front polarizer comprises a front polarizer (1), a first adhesive layer (2), a transparent conductive layer (3) and a light filter plate (4), wherein the transparent conductive layer (3) is deposited on the light filter plate (4), the front polarizer (1) is adhered to the transparent conductive layer (3) through the first adhesive layer (2), the refractive index of the front polarizer (1) is any value between 1.45 and 1.5, and the thickness is any value between 25 mu m and 35 mu m; the refractive index of the first adhesive layer (2) is any value between 1.48 and 1.78, and the thickness of the first adhesive layer is any value between 20 mu m and 50 mu m; the refractive index of the transparent conducting layer (3) is any value between 1.95 and 2.05, and the thickness is any value between 30nm and 40 nm;

the light filter plate is characterized by further comprising a first refraction layer (12) and a second refraction layer (13), wherein the first refraction layer (12) and the second refraction layer (13) are located between the transparent conducting layer (3) and the light filter plate (4), and the second refraction layer (13) and the first refraction layer (12) are sequentially deposited on the light filter plate (4); the refractive index of the first refractive layer (12) is lower than that of the second refractive layer (13); the refractive index of the first refractive layer (12) is any value between 1.4 and 1.5, and the thickness is any value between 30nm and 80 nm; the refractive index of the second refraction layer (13) is any value between 1.9 and 2.1, and the thickness is any value between 10nm and 30 nm.

2. The low reflectance display according to claim 1, wherein: the material of the first refraction layer (12) is SiO₂。

3. The low reflectance display according to claim 1, wherein: the second refraction layer (13) is made of SiN_x、Nb₂O₅Or ZrO₂。

4. The low reflectance display according to claim 1, wherein: the first glue layer (2) is made of silica gel.

5. The low reflectance display according to claim 1, wherein: the transparent conductive layer is characterized by further comprising a driving plate (6) and conductive adhesive (10), wherein the transparent conductive layer (3) is electrically connected to the driving plate (6) through the conductive adhesive (10).

6. The low reflectance display according to claim 5, wherein: the conductive adhesive (10) is silver paste, and the transparent conductive layer (3) is made of ITO.

7. The low reflectance display according to claim 5, wherein: the liquid crystal display panel is characterized by further comprising a sealing rubber frame (5), liquid crystal molecules (9) and electrodes (11), wherein a plurality of closed spaces are formed on the filter plate (4), the sealing rubber frame (5) and the driving plate (6), the liquid crystal molecules (9) are packaged in the closed spaces, and the two electrodes (11) are arranged on the driving plate (6) in the closed spaces.

8. The low reflectance display according to claim 7, wherein: the rear polarizer is characterized by further comprising a second adhesive layer (7) and a rear polarizer (8), wherein the rear polarizer (8) is adhered to the outer surface of the driving plate (6) through the second adhesive layer (7).