Driving backplane and display module

Abstract

The present invention provides a driver backplane and display module, comprising: a black matrix layer, the black matrix layer including a plurality of shielding structures, light-transmitting openings disposed between adjacent shielding structures, and a filter layer disposed in the light-transmitting openings; a driver circuit assembly located on the shielding structures; a reflective assembly located on the filter layer, the reflective assembly including a light-transmitting layer and a light-reflecting layer; the light-transmitting layer located on the filter layer, the light-transmitting layer including a first surface away from the filter layer, a second surface near the filter layer, and a side surface connecting the first and second surfaces; the orthographic projection of the first surface on the black matrix layer being within the orthographic projection of the second surface on the black matrix layer; and the light-reflecting layer covering at least a portion of the side surface of the light-transmitting layer and exposing at least a portion of the first surface. Thus, when light emitted by the luminescent layer passes through the reflective assembly, scattered light can be reflected and converged by the reflective layer toward the outside of the screen, thereby increasing the proportion of light emitted outside the screen and improving the display effect of the display module.

Description

Technical Field

[0001] The present application relates to the field of display device manufacturing, and more specifically, to a driving backplane and a display module. Background Art

[0002] Some bottom-emitting display devices, such as OLED TVs, often utilize COA (Color Filter On Array) backplane technology, which integrates a color filter with an array substrate. In COA backplanes, due to light blocking and loss by the various film layers, as well as light scattering in various directions, the proportion of light actually emitted outside the screen is low, affecting the display quality. Summary of the Invention

[0003] In order to overcome the technical problems mentioned in the above technical background, an embodiment of the present application provides a driving backplane, comprising:

[0004] a black matrix layer, the black matrix layer comprising a plurality of shielding structures, light-transmitting openings being provided between adjacent shielding structures, and a filter layer being provided in the light-transmitting openings;

[0005] a driving circuit assembly located on the shielding structure;

[0006] A reflective component located on the filter layer, the reflective component comprising a light-transmitting layer and a light-reflecting layer; the light-transmitting layer is located on the filter layer, the light-transmitting layer comprising a first surface away from the filter layer, a second surface close to the filter layer, and a side surface connecting the first surface and the second surface; the orthographic projection of the first surface on the black matrix layer is located within the orthographic projection of the second surface on the black matrix layer; the light-reflecting layer covers at least a portion of the side surface of the light-transmitting layer and exposes at least a portion of the first surface.

[0007] In a possible implementation, the graphic shape of the first surface of the light-transmitting layer, the graphic shape of the second surface, and the graphic shape of the light-transmitting opening are geometrically similar.

[0008] In a possible implementation, the orthographic projection of the first surface on the black matrix layer, the orthographic projection of the second surface on the black matrix layer, and the geometric center of the light-transmitting opening coincide with each other.

[0009] In a possible implementation, the light-transmitting opening is circular in shape, and the light-transmitting layer is a truncated cone with the first surface as the top surface and the second surface as the bottom surface.

[0010] In a possible implementation manner, orthographic projections of the first surface and the second surface on the black matrix layer are located within the light-transmitting opening.

[0011] In a possible implementation, the side of the light reflecting layer close to the black matrix layer extends to contact the black matrix layer, and the light-transmitting opening is located within an outer contour of an orthographic projection of the light reflecting layer on the black matrix layer;

[0012] Preferably, the light reflecting layer covers the entire side surface of the light transmitting layer.

[0013] In a possible implementation, the driving backplane further includes a transparent planarization layer covering the driving circuit component and the reflective component;

[0014] The first surface of the light-transmitting layer has a recess facing the second surface; the planarization layer exposes the recess.

[0015] In a possible implementation, the material of the light-transmitting layer includes transparent photoresist;

[0016] Preferably, the material of the reflective layer includes a metal with reflective properties.

[0017] Another object of the present application is to provide a display module, comprising the driving backplane and the light-emitting layer provided in the present application;

[0018] The driving backplane further includes a transparent planarization layer covering the driving circuit component and the reflective component;

[0019] The light-emitting layer includes:

[0020] a first electrode layer located on a side of the planarization layer away from the reflective component and corresponding to a position of the reflective component, the first electrode layer being connected to the driving circuit component via a through hole penetrating the planarization layer;

[0021] a pixel defining layer covering the planarization layer and the first electrode layer, wherein the pixel defining layer defines a pixel opening, and an orthographic projection of the pixel opening on the black matrix layer at least partially overlaps with the light-transmitting opening;

[0022] a layer of light-emitting material located in the pixel opening;

[0023] A second electrode layer is located on a side of the pixel defining layer and the light emitting material layer away from the first electrode layer.

[0024] In a possible implementation, the first electrode layer extends into the recess; and the pixel opening of the pixel defining layer exposes at least a portion of the first electrode layer located in the recess.

[0025] In a possible implementation, the material of the first electrode layer is a transparent conductive material;

[0026] Preferably, the light-emitting layer further comprises a support located on a side of the pixel defining layer away from the black matrix layer.

[0027] The driver backplane and display module provided in the embodiments of the present application feature a reflective assembly composed of a light-transmitting layer and a light-reflecting layer disposed on the filter layer of the driver backplane, so that the light-reflecting layer forms a light-collecting shield. Thus, in a display module using this driver backplane, when light emitted from the light-emitting layer passes through the reflective assembly, scattered light can be reflected and converged toward the outside of the screen by the light-reflecting layer, thereby increasing the proportion of light emitted outside the screen and improving the display quality of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 One of the schematic diagrams of the driver backplane provided in an embodiment of the present application;

[0030] Figure 2 The second schematic diagram of the driver backplane provided in the embodiment of the present application;

[0031] Figure 3 A schematic diagram of a transparent layer provided in an embodiment of the present application;

[0032] Figure 4 The third schematic diagram of the driver backplane provided in the embodiment of the present application;

[0033] Figure 5 One of the schematic diagrams of the display module provided in an embodiment of the present application;

[0034] Figure 6 A fourth schematic diagram of a driver backplane provided in an embodiment of the present application;

[0035] Figure 7 A second schematic diagram of a display module provided in an embodiment of the present application;

[0036] Figure 8 This is the third schematic diagram of the display module provided in the embodiment of the present application. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0040] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0041] It should be noted that, in the absence of conflict, different features in the embodiments of the present application can be combined with each other.

[0042] See Figure 1 , Figure 1 This is a schematic diagram of a driving backplane provided in this embodiment. The driving backplane may include a black matrix layer 100 , a driving circuit component 210 and a reflective component 220 .

[0043] The black matrix layer 100 may be made of a material with poor or no light transmittance, and includes a plurality of shielding structures 120 thereon, with light-transmitting openings 110 provided between adjacent shielding structures 120. Preferably, in this embodiment, the black matrix layer 100 may be provided with a plurality of light-transmitting openings 110, with adjacent light-transmitting openings 110 spaced apart from each other by the shielding structures 120, and each light-transmitting opening 110 may correspond to a light-emitting sub-pixel.

[0044] A filter layer 111 is disposed in the light-transmitting opening 110. In this embodiment, the color of the filter layer 111 disposed in the light-transmitting opening 110 is the same as the color of the light-emitting sub-pixel corresponding to the light-transmitting opening 110. For example, if a light-transmitting opening 110 corresponds to a red light-emitting sub-pixel, the filter layer 111 disposed in the light-transmitting opening 110 is a red filter layer 111; if a light-transmitting opening 110 corresponds to a green light-emitting sub-pixel, the filter layer 111 disposed in the light-transmitting opening 110 is a green filter layer 111. Preferably, the filter layer 111 can completely fill the corresponding light-transmitting opening 110.

[0045] The driving circuit assembly 210 is disposed on the shielding structure 120 of the black matrix layer 100. The driving circuit assembly 210 may include a thin film transistor (TFT) formed by multiple functional film layers, and the driving circuit assembly 210 may provide power to the anode layer in a controlled state.

[0046] In this embodiment, the driving backplane can be a driving backplane for a bottom-emitting display module. The light generated by the display module will be emitted from the side of the black matrix layer 100 where the driving circuit component 210 is provided to the other side of the black matrix layer 100. Therefore, the driving circuit component 210 is arranged at a position corresponding to the shielding structure 120 to avoid the metal part in the driving circuit component 210 reflecting external light and affecting the display effect of the display module.

[0047] The reflective component 220 is located on the filter layer 111. In this embodiment, the reflective component 220 includes a light-transmitting layer 221 and a light-reflecting layer 222. The light-transmitting layer 221 is located on the filter layer 111 and includes a first surface away from the filter layer 111, a second surface closer to the filter layer 111, and a side surface connecting the first and second surfaces. The orthographic projection of the first surface on the black matrix layer 100 is located within the orthographic projection of the second surface on the black matrix layer 100. For example, the area of ​​the orthographic projection of the first surface on the black matrix layer 100 can be less than or equal to the area of ​​the orthographic projection of the second surface on the black matrix layer 100. The light-reflecting layer 222 covers at least a portion of the side surface of the light-transmitting layer 221 and exposes at least a portion of the first surface.

[0048] The light-transmitting layer 221 is made of a transparent material, such as a transparent photoresist. The light-reflecting layer 222 is made of a reflective metal, such as a titanium-aluminum-titanium three-layer structure (Ti-Al-Ti), a two-layer composite structure of indium tin oxide and silver (ITO / Ag), a three-layer composite structure of indium tin oxide and silver (ITO / Ag / ITO), or metal molybdenum (Mo).

[0049] For some possible implementations, please refer again to Figure 1 The driving backplane may further include a planarization layer 300. The planarization layer 300 covers the driving circuit assembly 210 and the reflective assembly 220 and is made of a transparent material. The surface of the planarization layer 300 away from the driving circuit assembly 210 and the reflective assembly 220 may be at a substantially uniform distance from the black matrix layer 100.

[0050] Please refer to Figure 2 In one possible implementation, the cross-section of the light-transmitting layer 221 can be a trapezoid, with the upper base of the trapezoid corresponding to the first surface, the lower base corresponding to the second surface, and the waist corresponding to the side surface. Thus, when the reflective layer 222 covers at least a portion of the side surface of the light-transmitting layer 221, the reflective layer 222 can form a structure similar to a flashlight reflector, thereby reflecting and converging light originally scattered from the first surface toward the second surface, causing the emitted light to converge toward the light-transmitting opening 110 of the black matrix layer 100, thereby increasing the proportion of light emitted outside the screen and improving the display effect of the display module.

[0051] In some possible implementations, the shapes of the first surface of the light-transmitting layer 221, the second surface, and the light-transmitting opening 110 are geometrically similar. For example, the first surface, the second surface, and the light-transmitting opening 110 are all circular, but may differ in size; or the first surface, the second surface, and the light-transmitting opening 110 are regular polygons with the same number of sides, but may differ in size. In this way, light from the first surface of the light-transmitting layer 221, after being reflected and converged by the light-reflecting layer 222, can be emitted from the light-transmitting opening 110 of the black matrix layer 100 as much as possible.

[0052] Furthermore, in this embodiment, the orthographic projection of the first surface on the black matrix layer 100, the orthographic projection of the second surface on the black matrix layer 100, and the geometric center of the light-transmitting opening 110 coincide with each other. The geometric centers of the first surface, the second surface, and the light-transmitting opening 110 may be located on a straight line perpendicular to the black matrix layer 100.

[0053] For example, in one possible implementation, see Figure 3 The light-transmitting opening 110 is circular in shape, and the light-transmitting layer 221 is a truncated cone with the first surface as the top surface and the second surface as the bottom surface.

[0054] In another possible implementation, the light-transmitting opening 110 has an N-gon shape, and the light-transmitting layer 221 is an N-gon prism with the first surface as the top surface and the second surface as the bottom surface.

[0055] In this way, the light from the first surface of the light-transmitting layer 221 can be concentrated toward the center of the light-transmitting opening 110 as much as possible after being reflected and concentrated by the light-reflecting layer 222 .

[0056] In some possible implementations, the thickness of the light-transmitting layer 221 may be 1.5 micrometers to 3 micrometers.

[0057] In some possible implementations, the black matrix layer 100 may also have weak light transmittance. In this way, the light transmitted through the black matrix layer 100 at the edge of the light-transmitting opening 110 without passing through the filter at the light-transmitting opening 110 may have color deviation, which will affect the overall display effect. Therefore, please refer to Figure 3 and Figure 4 In this embodiment, to prevent light from being transmitted through the black matrix layer 100 at the edge of the light-transmitting opening 110 without passing through the filter layer 111, the orthographic projections of the first and second surfaces on the black matrix layer 100 are located within the light-transmitting opening 110. Thus, under the reflection effect of the reflective layer 222, light from the first surface is focused and propagated in the light-transmitting layer 221 and is restricted to be emitted only after passing through the filter layer 111.

[0058] In some possible implementations, in order to prevent light from being emitted from the side of the light-transmitting layer 221, please refer to Figure 4 In this embodiment, the side of the light-reflecting layer 222 close to the black matrix layer 100 extends to contact the black matrix layer 100, and the light-transmitting opening 110 is located within the outer contour of the orthographic projection of the light-reflecting layer 222 on the black matrix layer 100. Preferably, the light-reflecting layer 222 covers the entire side surface of the light-transmitting layer 221.

[0059] In some possible implementations, the driving circuit component 210 may include a passivation layer, an active layer, a first insulating layer, a gate layer, a second insulating layer, and a source / drain layer.

[0060] The passivation layer is located on the shielding structure 120 of the black matrix layer 100. The material of the passivation layer may be silicon oxide (SiOx). The thickness of the passivation layer may be 500 angstroms to 10,000 angstroms.

[0061] The active layer is located on a side of the passivation layer away from the black matrix layer 100 . The material of the active layer may be an oxide semiconductor, such as indium gallium zinc oxide (IGZO), indium tin zinc oxide (ITZO), indium tin oxide (ITO), etc.

[0062] The first insulating layer is located on a side of the active layer away from the passivation layer and covers the active layer. The first insulating layer may be a gate insulating layer. The material of the first insulating layer may include silicon oxide (SiOx). The thickness of the first insulating layer may be 500 angstroms to 10,000 angstroms.

[0063] The gate electrode layer is located on the side of the first insulating layer away from the active layer. The gate electrode layer can be made of a conductive metal material, such as molybdenum (Mo), a molybdenum-copper composite material (Mo / Cu), copper (Cu), a titanium-aluminum-titanium three-layer structure (Ti-Al-Ti), an aluminum (Al) alloy, etc.

[0064] The second insulating layer is located on the side of the gate layer away from the first insulating layer and covers the gate layer and the second insulating layer. The second insulating layer can be an interlayer dielectric (ILD). The material of the second insulating layer can include silicon nitride (SiNx) with a thickness of 1000 to 5000 angstroms on the side away from the first insulating layer and silicon oxide (SiOx) with a thickness of 1000 to 5000 angstroms on the side close to the first insulating layer.

[0065] The source / drain electrode layer is located on a side of the second insulating layer away from the first insulating layer, and the source / drain electrode layer is electrically connected to the active layer via through-holes penetrating the first insulating layer and the second insulating layer, respectively. The source / drain electrode layer can be made of a conductive metal material, such as molybdenum (Mo), a molybdenum-copper composite material (Mo / Cu), copper (Cu), a titanium-aluminum-titanium three-layer structure (Ti-Al-Ti), an aluminum (Al) alloy, etc.

[0066] Based on the same invention concept, please refer to Figure 5 This embodiment also provides a display module, which may include the driving backplane and light-emitting layer provided in this embodiment.

[0067] The light emitting layer may include a first electrode layer 600 , a pixel defining layer 500 , a light emitting material layer 700 and a second electrode layer 800 .

[0068] The first electrode layer 600 is located on a side of the planarization layer 300 away from the reflective assembly 220 and corresponds to the reflective assembly 220. The first electrode layer 600 is connected to the driving circuit assembly 210 via a through hole penetrating the planarization layer 300. In this embodiment, the first electrode layer 600 can be made of a transparent conductive material, such as indium tin oxide (ITO). The first electrode layer 600 can serve as the anode layer of a bottom-emitting display module.

[0069] The pixel defining layer 500 covers the planarization layer 300 and the first electrode layer 600 . The pixel defining layer 500 defines a pixel opening. The orthographic projection of the pixel opening on the black matrix layer 100 at least partially overlaps with the light-transmitting opening 110 .

[0070] The light-emitting material layer 700 is located in the pixel opening, and the light-emitting material layer 700 can be formed by evaporation.

[0071] The second electrode layer 800 is located on a side of the pixel defining layer 500 and the light emitting material layer 700 away from the first electrode layer 600. The color of the light emitting material layer 700 is the same as the color of the filter layer 111 at the corresponding position. The second electrode layer 800 may be a cathode layer.

[0072] In one possible implementation, see Figure 6 The first surface of the light-transmitting layer 221 has a recess 223 facing the second surface, and the planarization layer 300 exposes the recess 223 .

[0073] Based on the above design, please refer to Figure 7 After the first electrode layer 600 is formed, the first electrode layer 600 may extend into the recess 223 , and the pixel opening of the pixel defining layer 500 exposes at least a portion of the first electrode layer 600 located in the recess 223 .

[0074] If so, please refer to Figure 8 After the light-emitting material layer 700 is formed by evaporating into the pixel opening, at least a portion of the light-emitting material layer 700 can be located in the recess 223, so that the light emitted to both sides by this portion of the light-emitting material layer 700 can also be reflected and converged by the emission layer, further increasing the proportion of light emitted outside the screen and improving the display effect of the display module.

[0075] Preferably, the light emitting layer further includes a support located on a side of the pixel defining layer 500 away from the black matrix layer 100 .

[0076] In summary, the driver backplane and display module provided in the embodiments of the present application utilize a reflective assembly consisting of a light-transmitting layer and a light-reflecting layer disposed on the filter layer of the driver backplane, so that the light-reflecting layer forms a light-collecting shield. Thus, in a display module using this driver backplane, when light emitted from the light-emitting layer passes through the reflective assembly, scattered light can be reflected and converged toward the outside of the screen by the light-reflecting layer, thereby increasing the proportion of light emitted outside the screen and improving the display quality of the display module.

[0077] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A driving backplane, characterized in that: include: a black matrix layer, the black matrix layer comprising a plurality of shielding structures, light-transmitting openings being provided between adjacent shielding structures, and a filter layer being provided in the light-transmitting openings; a driving circuit assembly located on the shielding structure; a reflective component located on the filter layer, the reflective component comprising a light-transmitting layer and a light-reflecting layer; the light-transmitting layer located on the filter layer, the light-transmitting layer comprising a first surface away from the filter layer, a second surface close to the filter layer, and a side surface connecting the first surface and the second surface; The orthographic projection of the first surface on the black matrix layer is located within the orthographic projection of the second surface on the black matrix layer; The light reflecting layer covers at least a portion of the side surface of the light transmitting layer and exposes at least a portion of the first surface.

2. The driving backplane according to claim 1, characterized in that: The graphic shape of the first surface of the light-transmitting layer, the graphic shape of the second surface, and the graphic shape of the light-transmitting opening are geometrically similar.

3. The driving backplane according to claim 2, characterized in that: The orthographic projection of the first surface on the black matrix layer, the orthographic projection of the second surface on the black matrix layer, and the geometric center of the light-transmitting opening coincide with each other.

4. The driving backplane according to claim 3, characterized in that: The light-transmitting opening has a circular shape, and the light-transmitting layer is a truncated cone with the first surface as the top surface and the second surface as the bottom surface.

5. The driving backplane according to claim 1, characterized in that: The orthographic projections of the first surface and the second surface on the black matrix layer are located within the light-transmitting opening.

6. The driving backplane according to claim 1, characterized in that: A side of the light reflecting layer close to the black matrix layer extends to contact the black matrix layer, and the light-transmitting opening is located within an outer contour of an orthographic projection of the light reflecting layer on the black matrix layer.

7. The driving backplane according to claim 6, characterized in that: The light reflecting layer covers the entire side surface of the light transmitting layer.

8. The driving backplane according to claim 1, characterized in that: The driving backplane further includes a transparent planarization layer covering the driving circuit component and the reflective component; The first surface of the light-transmitting layer has a recess facing the second surface; the planarization layer exposes the recess.

9. The driving backplane according to any one of claims 1 to 8, characterized in that: The material of the light-transmitting layer includes transparent photoresist.

10. The driving backplane according to claim 9, characterized in that: The material of the light-reflecting layer includes a metal with light-reflecting properties.

11. A display module, characterized in that: Comprising the driving backplane and the light-emitting layer according to any one of claims 1 to 10; The driving backplane further includes a transparent planarization layer covering the driving circuit component and the reflective component; The light-emitting layer includes: a first electrode layer located on a side of the planarization layer away from the reflective component and corresponding to a position of the reflective component, the first electrode layer being connected to the driving circuit component via a through hole penetrating the planarization layer; a pixel defining layer covering the planarization layer and the first electrode layer, the pixel defining layer defining a pixel opening, wherein an orthographic projection of the pixel opening on the black matrix layer at least partially overlaps with the light-transmitting opening; a layer of light-emitting material located in the pixel opening; A second electrode layer is located on a side of the pixel defining layer and the light emitting material layer away from the first electrode layer.

12. The display module according to claim 11, wherein: The driving backplane further includes a transparent planarization layer covering the driving circuit component and the reflective component; The first surface of the light-transmitting layer has a recess facing the second surface; The planarization layer exposes the recess, and the first electrode layer extends into the recess; The pixel opening of the pixel defining layer exposes at least a portion of the first electrode layer located in the recess.

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