CN111223878B - Array substrate, display panel and liquid crystal display device - Google Patents

Abstract

The invention discloses an array substrate, a display panel and a liquid crystal display device, wherein the array substrate comprises a first substrate and a thin film transistor arranged above the first substrate, the thin film transistor is provided with a channel region, a first shading layer is arranged between the channel region and the first substrate, and a protective layer for reducing the number of photo-generated carriers in the channel region is arranged above the channel region; the display panel comprises the array substrate, and the liquid crystal display device comprises the display panel; the invention can provide a design scheme for improving the image retention problem of the display, and the number of photo-generated carriers in a channel region is greatly reduced by absorbing photoelectrons or reducing a transmissible path of light, so that the liquid crystal polarization effect can be obviously reduced, the image retention is improved, the image retention problem of the conventional display panel caused by the photo-generated carriers is thoroughly solved, the quality of the display panel is obviously improved, and the user experience is better.

Description

Array substrate, display panel and liquid crystal display device

technical field

The present invention relates to the field of display technology, more specifically, the present invention is an array substrate, a display panel and a liquid crystal display device.

Background technique

At present, most of the liquid crystal displays on the market are backlight liquid crystal displays. The backlight liquid crystal display includes a liquid crystal display panel and a backlight module (backlight module), and liquid crystal molecules are often placed between two parallel glass substrates, and the two pieces There are many small wires arranged in the glass substrate, and the liquid crystal molecules are controlled to change the wires by whether the electricity is on or not, so as to refract the light from the backlight module and generate a corresponding picture; the processing technology generally includes: front-end array (array) process, middle-end The cell process and the back-end module assembly process, among which, the above-mentioned array process is often used to form TFT substrates, and the cell process is often used between TFT substrates and CF (color filter, color filter) substrates Adding liquid crystals, the assembly process is often used for the integration of driver ICs and printed circuit boards. After the processing is completed, one of the quality evaluation methods of the display is the image sticking test, that is, when the display keeps a fixed picture for a long time and then switches the picture content, you can still see the traces of the last frame of still picture, that is, image sticking. ) problem, which greatly reduces the quality of the liquid crystal panel, resulting in poor user experience with existing displays. Although some solutions have been proposed in the prior art, there are often problems such as excessive changes to the original manufacturing process, high cost, and difficulty in implementation.

Therefore, how to effectively reduce or even eliminate the image sticking problem and improve the performance of the display has become a technical problem to be solved urgently by those skilled in the art and a focus of research all the time.

Contents of the invention

In order to solve the image sticking problem existing in the existing display, the present invention innovatively provides an array substrate, a display panel and a liquid crystal display device, which innovatively and effectively protects the channel region of the TFT device and reduces the number of photogenerated carriers in the channel region , so as to better solve the above problems.

In order to achieve the above technical purpose, the present invention provides an array substrate, which includes a first substrate and a thin film transistor disposed above the first substrate, the thin film transistor has a channel region, and the channel region A first light-shielding layer is arranged between the first substrate, and a protective layer for reducing the number of photogenerated carriers in the channel region is arranged on the surface of the channel region away from the first light-shielding layer.

Based on the above-mentioned technical solution, the present invention innovatively provides an array substrate with a protective layer, which can greatly reduce the number of photogenerated carriers in the channel region of the thin film transistor in the array substrate, thereby reducing the polarization effect of liquid crystal, and further improving the image quality. The purpose of remaining is to thoroughly solve many problems existing in the prior art, improve the quality of the display panel using the above-mentioned array substrate, and provide users with a better experience of using the display panel of the present invention.

Further, the protective layer is a collecting electrode layer for absorbing photoelectrons.

Based on the above improved technical solution, the present invention innovatively adopts a photoelectron absorption structure, specifically uses the collecting electrode layer for absorbing photoelectrons as a protective layer, and greatly reduces the number of photogenerated carriers in the channel region by absorbing photoelectrons. Therefore, the polarization effect of the liquid crystal can be reduced, thereby improving image retention, so as to completely solve the problem of image retention caused by photogenerated carriers in existing display panels, significantly improve the quality of the display panel, and provide a very good user experience.

Further, the collecting electrode layer is an indium tin oxide layer.

Further, the channel region is surrounded by a planar layer and an active layer both arranged under the protective layer, a first passivation layer is arranged between the planar layer and the protective layer, and the first A passivation layer covers the channel region, a buffer layer and an insulating layer are arranged between the planar layer and the first substrate, and the active layer is simultaneously embedded in the planar layer and the buffer layer , the first light-shielding layer is embedded in the insulating layer, and both the insulating layer and the light-shielding layer are disposed between the buffer layer and the first substrate.

Further, a second passivation layer and a first color resistance layer are arranged between the first passivation layer and the protection layer, and the second passivation layer is between the protection layer and the first color resistance layer. between layers.

Further, the protection layer is a second light-shielding layer for preventing light from entering the channel region.

Based on the above-mentioned improved technical solution, the present invention innovatively adopts a light-shielding structure, uses the second light-shielding layer for preventing light from entering the channel area as a protective layer, and greatly reduces the channel area by reducing the transmission path of light. The number of photo-generated carriers in the interior can reduce the polarization effect of liquid crystal, and then improve image sticking, so as to completely solve the problems of image sticking and crosstalk caused by photo-generated carriers in existing display panels, and significantly improve the array using the present invention. Substrate display panel quality, better user experience.

Further, the upper surface of the second light-shielding layer is on the same plane as the upper surface of the spacer.

Further, the second light-shielding layer is a black matrix layer.

In order to achieve the above technical purpose, the present invention also provides a display panel, the display panel includes any one of the above-mentioned array substrates, the display panel also includes a second substrate disposed above the protective layer, the second substrate A second color resist layer is arranged below.

In order to achieve the above technical purpose, the present invention further provides a liquid crystal display device, which includes any one of the above-mentioned display panels or any one of the above-mentioned array substrates.

The beneficial effects of the present invention are: the present invention provides a design scheme that can be used to improve the image sticking problem of the display, and greatly reduces the number of photogenerated carriers in the channel region by absorbing photoelectrons or reducing the transmission path of light, thereby It can reduce the liquid crystal polarization effect, thereby improving image retention, so as to completely solve the problem of image retention caused by photogenerated carriers in existing display panels, significantly improve the quality of display panels, and provide better user experience.

The present invention can effectively improve the electrical stability of TFT devices, reduce the occurrence probability of display panel anomalies caused by TFT electrical changes such as uneven display and image sticking, and can effectively improve the product quality of display panels (such as TFT-LCD), and has the advantages of Outstanding advantages such as high reliability and low cost. Therefore, the present invention can greatly improve the performance of the TFT device, further significantly improve the product quality of the display panel, and can obviously prolong the life of the display panel, which has great promotion value and market value.

In addition, the present invention can also effectively solve problems such as display panel crosstalk (Crosstalk) and voltage flicker (Flicker) caused by leakage current, which significantly improves the quality of the display panel and the picture quality of the display. The device experience is excellent.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of each embodiment. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings in the following detailed description of the present invention on the premise of not paying creative work.

FIG. 1 is a schematic structural diagram of a section of a display panel according to a first embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a section of a display panel according to a second embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a section of a display panel according to a third embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a section of a display panel according to a fourth embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a section of a display panel according to a fifth embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a section of a display panel according to a sixth embodiment of the present invention.

FIG. 7 is a schematic diagram of the spatial light path entering the channel region of the array substrate.

8 is a schematic diagram of abnormal electrical analysis results of afterimage (image sticking) without backlight current-voltage (I-V) measurement.

FIG. 9 is a schematic diagram of abnormal electrical analysis results of afterimage (image sticking) with backlight current-voltage (I-V) measurement.

In the figure,

1. The first substrate; 2. The first light-shielding layer; 3. The protective layer; 4. The flat layer; 5. The active layer; 6. The first passivation layer; 7. The buffer layer; 8. The insulating layer; 9. The second The second passivation layer; 10, the first color resistance layer; 11, the spacer; 12, the second substrate; 13, the second color resistance layer.

detailed description

The technical solutions of an array substrate, a display panel and a liquid crystal display device provided by the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation shown in the drawings Or positional relationship is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, so it should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only, and should not be interpreted as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined as "first", "second", and "third" may explicitly or implicitly include one or more features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, the word "exemplary" is used to mean "serving as an example, illustration or illustration". Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to make and use the invention. In the following description, details for purposes of explanation of the invention are set forth. It should be understood that one of ordinary skill in the art would recognize that the present invention may be practiced without the use of these specific details. In other instances, well-known structures and procedures are not described in detail to avoid obscuring the description of the present invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.

In a large amount of analysis of the image sticking of actual display products, the inventor finally verified that the electrical drift of the TFT (Thin Film Transistor, thin film transistor) device is the first choice factor causing the image sticking problem of the display (i.e. the main influencing condition of the image sticking), and the TFT The electrical drift of the device is proved to be directly related to the illumination of the test environment (close to the actual use environment of the product) in the process of analytical analysis, please refer to Figure 8, Figure 8 is the afterimage measured without backlight current-voltage (I-V) ( Image sticking) schematic diagram of abnormal electrical analysis results, as can be seen from Figure 8, under the condition of no light, the difference between the actual test results (dotted line in the illustration) and the predicted result (solid line in the illustration) in Figure 8 is relatively small; however, after After being illuminated, it will lead to the increase of photogenerated carriers (loff) in the channel region of the TFT device, and the increase of the leakage current of the TFT device, which will cause the electrical variation of the TFT device. After a long time of use, the polarization of the liquid crystal will be inconsistent, resulting in afterimage ) deterioration, please refer to Figure 9 again. Figure 9 is a schematic diagram of the abnormal electrical analysis results of afterimage (image retention) with backlight current-voltage (I-V) measurement. It can be seen from Figure 9 that under the condition of light, the actual The test results (dotted line in the diagram) are quite different from the predicted results (solid line in the diagram). In view of this, the present invention is dedicated to reducing the number of photogenerated carriers in the channel region, so as to weaken or even eliminate the problem of display image sticking caused by photogenerated carriers. The methods adopted are specifically divided into two types: (1) absorbing TFT device channel The photoelectrons generated in the region, (2) reduce or even prevent light from entering the corresponding channel region; the specific description is as follows.

Embodiment one:

Please refer to FIG. 7 . FIG. 7 is a schematic diagram of the spatial light path entering the channel region of the array substrate. After the light shown at the bottom of FIG. 7 enters, the space in the box of the display panel (panel) (cell gap) (as shown in FIG. 7 between the black matrix layer above the first passivation layer 6 and below the second substrate 12 space) light enters, although the channel area can be protected by the black matrix layer under the first light-shielding layer 2 and the second substrate 12, the light will be diffusely reflected in the cell, and the diffusely reflected light can still enter the channel region (the region shown by the inverted trapezoid in the center of the figure), as shown in Figure 7, the light entering the channel region increases the photogenerated carriers in the channel region of the TFT device, which in turn leads to an increase in the leakage current, increasing The leakage current of the TFT device will change the electrical properties of the TFT device, and the mutated electrical properties will affect the normal operation of the liquid crystal. The liquid crystal that works abnormally may often cause image retention. Traces of the last still frame can be seen; among them, the arrows indicate the schematic diagram of the path and direction of light flow.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a cross section of a display panel according to a first embodiment of the present invention. Including the first substrate 1 and the thin film transistor arranged above the first substrate 1, in specific implementation, the first substrate 1 can be transparent glass on the TFT side, and the thin film transistor arranged on the transparent glass on the TFT side has a channel region, and the channel A first light-shielding layer 2 is arranged between the region and the first substrate 1. In some embodiments of the present invention, the orthographic projection area of the channel region on the first substrate 1 is smaller than that of the first light-shielding layer 2 on the first substrate 1. Orthographic projection area, so that the light directly incident from below cannot directly enter the channel region. The core point of the present invention is that: on the surface of the channel region far away from the first light-shielding layer, there is a The protective layer 3 with the number of photo-generated carriers can fundamentally reduce the electrical impact of photo-generated carriers after reducing the number of photo-generated carriers, thereby weakening the intensity of photo-generated carriers in the channel of the TFT device. In specific implementation, the channel region is surrounded by the flat layer 4 and the active layer 5 which are both arranged under the protective layer 3, the upper channel region in this embodiment is surrounded by the flat layer 4, and the lower channel region is surrounded by the active layer 5. Enclosed by the source layer 5, a first passivation layer 6 is arranged between the flat layer 4 and the protective layer 3, the first passivation layer 6 can cover the channel region, and a The buffer layer 7 and the insulating layer 8, the active layer 5 is embedded in the flat layer 4 and the buffer layer 7 at the same time, that is, the upper half of the active layer 5 is embedded in the flat layer 4, and the lower half of the active layer 5 is embedded in the buffer layer 7, the first light-shielding layer 2 can be embedded in the insulating layer 8. In this embodiment, the lower surface of the first light-shielding layer 2 and the lower surface of the insulating layer 8 are on the same plane, which is the upper surface of the first substrate 1. On the surface, as shown in FIG. 1 , the above-mentioned insulating layer 8 and the first light-shielding layer 2 are both disposed between the buffer layer 7 and the first substrate 1 . It should be understood that, for those skilled in the art, the above-mentioned "above" and "below" in the present invention are only to describe the positional relationship between the various parts more clearly, and cannot be understood as references to the actual product use or placement. limits.

As a preferred technical solution, the protective layer 3 in this embodiment is a collecting electrode layer for absorbing photoelectrons, specifically in this embodiment, the collecting electrode layer is an indium tin oxide layer (ITO layer, indium tin oxide layer) , during implementation, the added ITO layer can cover the corresponding region that needs to suppress photogenerated carriers. The advantage of this method is that no additional process is required in the existing TFT-LCD manufacturing process, and it has the advantages of simple implementation and low cost. Low cost, high reliability and other outstanding advantages.

Please refer to FIG. 2 . FIG. 2 is a schematic structural diagram of a section of a display panel according to a second embodiment of the present invention. As shown in Figure 2, this method is suitable for COA (color filter on array, color filter integrated transistor type) products, that is, the color resistance can be made on the TFT (thin film transistor) side. Based on the above product structure, the first A second passivation layer 9 and a first color resistance layer 10 are arranged between the passivation layer 6 and the protective layer 3, the second passivation layer 9 is between the protective layer 3 and the first color resistance layer 10, and the first color resistance layer 10 The resistance layer 10 can fill the space where it is located, and the first color resistance layer 10 can be at least one of red resistance, green resistance, and blue resistance, and for the ITO layer as the protective layer 3, as a preferred According to the technical scheme, the ITO layer and the Array COM (array interface) used to capture photoelectrons in this embodiment are set to the same voltage, so that the photoelectron capture capability of the above-mentioned ITO layer can be significantly improved, and the present invention can be more effectively To solve the problem of image sticking, during specific implementation, the ITO layer used to capture photoelectrons in this embodiment is connected to the peripheral com line (interface connection line), so that the TFT area can be covered and not connected to the relevant ITO electrodes in the pixel (pixel). Can.

For the ITO layer voltage setting for capturing photoelectrons, in another preferred technical scheme, another ITO layer (as shown in Fig. 2) is the same voltage, then there is no potential difference between the liquid crystal molecules in the region between the two ITO layers. If there is no potential difference, the liquid crystal molecules cannot be deflected. On the basis of the above scheme, the photo-generated current carrying is avoided from the other hand. The impact of sub-, to solve the problem of image sticking.

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a section of a display panel according to a third embodiment of the present invention. The present invention also provides another structural scheme of the array substrate, which reduces or even eliminates photoelectrons in the channel region by means of shading. In order to prevent light from entering the second light-shielding layer in the channel region, the use of the second light-shielding layer can significantly reduce the transmittable path of light in the display panel (panel), specifically, the use of the second light-shielding layer can significantly reduce the transmission of light in the channel region of the TFT device. In this embodiment, the area where the active layer 5 (the AS layer, that is, the semiconductor layer) is located will not be affected by light. The second light-shielding layer in this embodiment at least covers the channel area of the thin film transistor, reducing backlight The diffusely reflected light of the source light or the side light enters the channel region of the thin film transistor, thereby reducing the photogenerated carriers, thereby reducing the leakage current, and achieving the purpose of reducing crosstalk, voltage flicker and other phenomena, so the present invention Significantly improved the display quality of the LCD panel. In the display panel processing technology, after the photomask manufacturing process (that is, the TFT pattern is completed), a light-shielding layer can be added at the TFT (Thin Film Transistor) channel area, as shown in Figure 3. Compared with the existing manufacturing process , this solution is only to add an additional layer of photomask. After the array (ie, array) process is completed, a layer of light-shielding layer is made to play the above-mentioned protective role. This process step can be made after all the film layers on the array are completed. The The method can effectively avoid the abnormality detection problem affecting the original array, and the above-mentioned implementation mode also has the advantages of simplifying the manufacturing process and optimizing the implementation process as a whole, and reduces the processing cost. When this solution is implemented, preferably, the above-mentioned second light-shielding layer can be a chromium layer, a tungsten layer, an aluminum layer or other metal layers or other metal compound layers and the like.

Please refer to FIG. 4 . FIG. 4 is a schematic structural diagram of a section of a display panel according to a fourth embodiment of the present invention. As another preferred technical solution, the present invention can also make the second light-shielding layer thicker, that is, the thickness of the second light-shielding layer is relatively large, and its thickness can reach the thickness of PS (post spacer, spacer). The upper surface of the second light-shielding layer is on the same plane as the upper surface of the spacer 11. The advantage of this solution is that it can not only achieve the purpose of light-shielding in the channel area of the TFT device, but also save a PS (post spacer, spacer) Compared with the existing technology, this improved technical solution does not require a separate PS (post spacer, spacer) process, and can even save a BM (black matrix, black matrix) process on the CF side, that is, to improve The latter technical solution does not require a separate BM (black matrix, black matrix) process. The basic function of the spacers involved is often to support the cell substrate, thereby maintaining a certain cell thickness and space.

Please refer to FIG. 5 . FIG. 5 is a schematic structural diagram of a section of a display panel according to a fifth embodiment of the present invention. As a preferred technical solution, the second light-shielding layer used in this embodiment can be a black matrix layer (BM layer, blackmatrix layer), and the light-shielding layer is arranged above the corresponding TFT channel area that needs light-shielding, and the display panel works normally. In this embodiment, the black matrix layer on the original CF (color filter, color filter) side can be arranged in the TFT channel area that needs to be shielded from light. This method can omit the CF (color filter, color filter) The matrix layer arranged on the side of CF (color filter, color filter) is used as the above-mentioned second light-shielding layer.

Please refer to FIG. 6 . FIG. 6 is a schematic structural diagram of a section of a display panel according to a sixth embodiment of the present invention. The present invention can also make the color resistance layer on the side of the TFT device. This method is especially suitable for COA (color filter on array, color filter integrated transistor type) products, as shown in Figure 6. The second light-shielding layer can also have a black matrix layer arranged on the CF side (color filter, color filter) side. As shown in FIG. 6, a second passivation layer 9 and a first color-resist layer 10 are arranged between the first passivation layer 6 and the protective layer 3, and the second passivation layer 9 is between the protective layer 3 and the first color-resistor layer. Between the layers 10, that is, the first color-resist layer 10 is below the second passivation layer 9, and the first color-resist layer 10 can be one of red resist, green resist, and blue resist.

It can be known from the above embodiments that the present invention provides a protective structure for the array substrate. Under the protection of the protective structure, the present invention can effectively reduce the influence of light on the channel region, reduce the leakage current concentration, and avoid photogenerated carriers. The interference to the TFT (thin film transistor) device can significantly improve the voltage holding ratio (VHR, voltage holding ratio) of the TFT (thin film transistor) device, thereby greatly improving the quality of the display. It should be understood that the processing of the array substrate or display panel in the present invention is only an increase or decrease of a certain process on the existing process, so those skilled in the art can carry out the entire processing process of the product as needed. Reasonably and wisely selected, the present invention will not repeat them.

Embodiment two:

Based on the same inventive concept as Embodiment 1, this embodiment provides a display panel, which includes an array substrate of any structure in Embodiment 1. The specific structure of the array substrate is as described in Embodiment 1. This embodiment will not go into details. As shown in FIGS. In this embodiment, the second color resistance layer 13 can be at least one of red resistance, green resistance or blue resistance. When this embodiment is implemented, the second color resistance layer 13 on the left can be green resistance or Red resistance or blue resistance, the second color resistance layer 13 on the right can be red resistance, green resistance or blue resistance. In practice, the second substrate 12 can often be CF (color filter, color filter) side transparent glass, that is, the display panel of this embodiment can be improved on the basis of the existing backlight liquid crystal display panel design.

Embodiment three:

Based on the same inventive concept as Embodiment 1, this embodiment provides a liquid crystal display device, which includes the display panel in Embodiment 2 or the array substrate in Embodiment 1. In specific applications, the liquid crystal display The device can be a display screen of a smart phone, tablet computer, laptop computer, smart bracelet, smart watch, smart glasses, smart helmet, desktop computer, smart TV or digital camera, etc. on electronic equipment.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and simple improvements made on the essence of the present invention should be included in the protection scope of the present invention. Inside.

Claims (5)

1. An array substrate, comprising: the array substrate comprises a first substrate (1) and a thin film transistor arranged above the first substrate (1), wherein the thin film transistor is provided with a channel region, a first shading layer (2) is arranged between the channel region and the first substrate (1), and a protective layer (3) used for reducing the number of photo-generated carriers in the channel region is arranged on the surface of the channel region, which is far away from the first shading layer;

the optoelectronic semiconductor device comprises a channel region, a flat layer (4) and an active layer (5) which are arranged below a protective layer (3) are enclosed into the channel region, a first passivation layer (6) is arranged between the flat layer (4) and the protective layer (3), the first passivation layer (6) covers the channel region, a buffer layer (7) and an insulating layer (8) are arranged between the flat layer (4) and a first substrate (1), the active layer (5) is embedded into the flat layer (4) and the buffer layer (7) at the same time, a first shading layer (2) is embedded into the insulating layer (8), the insulating layer (8) and the shading layer are arranged between the buffer layer (7) and the first substrate (1), a second passivation layer (9) and a first color resistance layer (10) are arranged between the first passivation layer (6) and the protective layer (3), the second passivation layer (9) is arranged between the protective layer (3) and the first color resistance layer (10), the protective layer (3) is a collection electrode layer for absorbing photoelectrons, and is arranged into a same voltage interface array.

2. The array substrate of claim 1, wherein: the collecting electrode layer is an indium tin oxide layer.

3. The array substrate of claim 1, wherein: the protective layer (3) is a second shading layer for preventing light from entering the channel region.

4. A display panel, characterized in that: the display panel comprising the array substrate of any of claims 1-3, further comprising a second substrate (12) arranged above the protective layer (3), the second substrate (12) having a second color resist layer (13) arranged below.

5. A liquid crystal display device, characterized in that: the liquid crystal display device includes the display panel of claim 4 or the array substrate of any one of claims 1 to 3.

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