High-contrast display panel, display device and electronic equipment

Abstract

The invention discloses a high-contrast display panel, a display device and electronic equipment, the display panel comprises a color filter substrate, a liquid crystal layer, an array substrate and a flexible circuit board, the color filter substrate and the array substrate are oppositely arranged, the liquid crystal layer is arranged between the color filter substrate and the array substrate, and the flexible circuit board is arranged between the color filter substrate and the array substrate. A conductive block is arranged at the junction position of the color filter substrate and the array substrate, the conductive block enables a back electrode of the color filter substrate and a binding position of the flexible circuit board to be connected through a conductive object, and the color filter substrate comprises a color filter. The black shading layer in the color filter is connected with the system ground through a conductive object, and the common electrode of the array substrate is connected with the system ground. According to the invention, on the premise of not increasing any cost and not adjusting process parameters, the mask of the black shading layer is changed, so that the problem of brightening of a black picture can be solved.

Description

Technical Field

[0001] The invention relates to a high-contrast display panel and a display device, and belongs to the field of industrial robot processing and manufacturing. Background Art

[0002] With the development of the times and the advancement of technology, people have increasingly demanding requirements for electronic products, not only in terms of functionality, but also in terms of the display effects. This has promoted the development of display screen products towards narrow bezels and high contrast. The most critical point of high contrast is that the brightness of the black screen must be low enough, and the entire screen or part of it should not be bright.

[0003] Due to the limitations of the black light-shielding layer (BM) material properties, the resistivity of the black light-shielding layer cannot be made too high. Moreover, its resistivity will fluctuate significantly with process fluctuations. When its resistivity is low, the black light-shielding layer is affected by the array substrate's scan lines or scan line driver circuit (Gate On Array, GOA), generating induced charges. This creates a potential difference between the black light-shielding layer and the common electrode, which will interfere with the normal flipping of the liquid crystal, resulting in the problem of black screens appearing bright, reducing the display quality and production yield. Summary of the Invention

[0004] The first object of the present invention is to provide a high-contrast display panel that can solve the problem of black screen brightness by making some changes to the mask of the black light-shielding layer without increasing any cost or adjusting process parameters.

[0005] A second object of the present invention is to provide a display device including the high-contrast display panel.

[0006] A third object of the present invention is to provide an electronic device comprising the above display device.

[0007] The first object of the present invention can be achieved by adopting the following technical solutions:

[0008] A high-contrast display panel includes a color filter substrate, a liquid crystal layer, an array substrate, and a flexible circuit board. The color filter substrate and the array substrate are arranged opposite each other, and the liquid crystal layer is arranged between the color filter substrate and the array substrate. A conductive block is provided at the junction of the color filter substrate and the array substrate. The conductive block connects the back electrode of the color filter substrate to the binding position of the flexible circuit board via a conductive material. The color filter substrate includes a color filter, and the black light-shielding layer in the color filter is connected to the system ground via a conductive material. The common electrode of the array substrate is connected to the system ground.

[0009] Furthermore, the conductive object contacts the cross section of the black light shielding layer, so that the black light shielding layer is connected to the system ground.

[0010] Furthermore, the mask of the black light-shielding layer partially extends to the edge of the color filter.

[0011] Furthermore, one or four sides of the mask of the black light-shielding layer extend to the edge of the color filter.

[0012] Furthermore, the conductive material is silver paste.

[0013] Furthermore, the display screen formed by the color filter substrate, the liquid crystal layer and the array substrate has a display area and a peripheral area, and the left and right sides of the display area are densely arranged with scan lines or scan line driving circuits.

[0014] Furthermore, the color filter substrate is provided with a black light shielding layer, an ink layer and a planarization layer on a side opposite to the array substrate, and the ink layer is provided between the black light shielding layer and the planarization layer.

[0015] Furthermore, the array substrate is provided with a common electrode, a pixel electrode and a semiconductor layer on a side opposite to the color filter substrate.

[0016] The second object of the present invention can be achieved by adopting the following technical solutions:

[0017] A display device comprises the above-mentioned high-contrast display panel.

[0018] The third object of the present invention can be achieved by adopting the following technical solutions:

[0019] An electronic device includes the above-mentioned display device.

[0020] The present invention has the following beneficial effects compared to the prior art:

[0021] The present invention provides a conductive block at the junction of the color filter substrate and the array substrate. The conductive block connects the back electrode of the color filter substrate to the binding position of the flexible circuit board through a conductive material. The binding position inputs the system ground signal to shield the interference electric field in the external environment and ensure the normal flipping of the liquid crystal. In addition, the black shading layer in the color filter is connected to the system ground through a conductive material. When the black shading layer generates induced charges, the charges are promptly conducted away. The electric potential of the black shading layer is always the same as the system ground. The common electrode of the array substrate is connected to the system ground, and no potential difference can be formed between the black shading layer and the common electrode. This can effectively avoid the interference of the induced charges of the black shading layer on the liquid crystal layer, thereby solving the problem of brightening the black screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 Schematic diagram of the basic structure of the high contrast display panel of the present invention.

[0024] Figure 2 It is a schematic diagram of the basic structure of the high contrast display panel of the present invention in which the induced charge interferes with the liquid crystal flipping.

[0025] Figure 3 Schematic diagram of the basic structure of the high-contrast display panel of the present invention displaying a black screen.

[0026] Figure 4 This is a front structural schematic diagram of a high-contrast display panel according to the present invention, in which a conductive block is provided as a basic structure.

[0027] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0028] Figure 6 for Figure 5 BB cross-section view in.

[0029] Figure 7 This is a schematic diagram of the front structure of an embodiment of a high-contrast display panel of the present invention.

[0030] Figure 8 for Figure 7 Enlarged view of point C in the middle.

[0031] Figure 9 for Figure 8 DD cross-sectional view in.

[0032] Among them, 1-color filter substrate, 101-black light-shielding layer, 102-ink layer, 103-planarization layer, 104-back electrode, 2-liquid crystal layer, 3-array substrate, 301-common electrode, 302-pixel electrode, 303-semiconductor layer, 4-flexible circuit board, 401-binding position, 5-conductive block, 501-conductive object. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] Example:

[0035] like Figure 1 As shown, the basic structure of the high contrast display panel of the present invention includes a color filter (color film, CF) substrate 1, a liquid crystal layer 2 and an array substrate (array) 3. The color filter substrate 1 is arranged opposite to the array substrate 3, and the liquid crystal layer 2 is arranged between the color filter substrate 1 and the array substrate 3. The color filter substrate 1 includes a color filter. The color filter substrate 1 is provided with a black shading layer (black matrix, BM) 101, an ink layer 102 and a planarization layer 103 on the side opposite to the array substrate 3. The black shading layer 101 is provided in the color filter, and the ink layer 102 is red / green. / blue ink layer (R / G / B), which is arranged between the black light-shielding layer 101 and the planarization layer (OC) 103. The array substrate 3 is provided with a common electrode 301, a pixel electrode 302 and a semiconductor layer 303 on the side opposite to the color filter substrate 1. The data line transmits an electrical signal to the pixel electrode 302 through a transistor (TFT), forming a potential difference between it and the common electrode 301. The liquid crystal layer 2 is affected by the electric field force and flips in the horizontal plane. When a black screen is displayed, the potential difference between the pixel electrode 302 and the common electrode 301 is approximately zero, that is, the liquid crystal layer 2 is not affected by the electric field force.

[0036] like Figure 1 and Figure 2 As shown, the display screen composed of the color filter substrate 1, the liquid crystal layer 2 and the array substrate 3 has a display area (AA area) and a peripheral area (non-AA area). Scan lines or scan line driving circuits (GOA) are densely arranged on the left and right sides of the display area. The signals of the scan lines or scan line driving circuits are around -10V most of the time. Large black shading layers 101 are arranged on the left and right sides of the display area to block the peripheral area to prevent backlight leakage. The black shading layer 101 is mainly composed of organic matter, which contains carbon C element. During the manufacturing process, the resistivity of the black shading layer 101 is difficult to control. When the BM resistivity is low, the black shading layer 101 is affected by the scan lines or the scan line driving circuit (GOA), and a large amount of induced charge is generated, thereby forming a large potential difference between the black shading layer 101 and the common electrode 301; Figure 3As shown, when a black screen is displayed, the liquid crystal layer 2 is abnormally flipped due to the electric field force of the black shading layer 101 and the common electrode 301. The closer the black shading layer 101 is to the left and right borders, the more charge it induces. The display screen appears as a bright black screen, and the closer to the left / right border position, the higher the brightness; the farther away from the left and right borders, the brightness gradually returns to normal.

[0037] like Figures 4 to 6 As shown in FIG. 1 , a schematic diagram of a structure in which a conductive block is provided in the basic structure of a high-contrast display panel of the present invention, the panel further includes a flexible circuit board (FPC) 4. A conductive block 5 is provided at the junction of the color filter substrate 1 and the array substrate 3. The conductive block 5 connects the back electrode (ITO) 104 of the color filter substrate 1 to the binding position 401 of the flexible circuit board 4 via a conductive material 501. The binding position 401 inputs a system ground (GND) signal to shield the interfering electric field in the external environment and ensure normal flipping of the liquid crystal. The conductive material 501 can be made of silver paste or other conductive materials.

[0038] In one embodiment, by modifying the mask pattern of the black light shielding layer 101 near the conductive block 5, the boundary of the black light shielding layer 101 is flush with the edge of the cut color filter, and is exposed in the cross section and is not covered by the planarization layer. Figures 7 to 9 As shown, the conductive object 501 contacts the cross section of the black light-shielding layer 101, connecting the black light-shielding layer 101 to the system ground. At this time, the black light-shielding layer 101 is electrically connected to the conductive block 5, and the conductive block 5 is electrically connected to the system ground. When the black light-shielding layer 101 generates induced charges, the charges are promptly conducted away, and the electric potential of the black light-shielding layer 101 is always the same as the system ground. The common electrode 301 of the array substrate 3 is connected to the system ground, and no potential difference is formed between the black light-shielding layer 101 and the common electrode 301. This can effectively prevent the induced charges of the black light-shielding layer 101 from interfering with the liquid crystal layer 2, thereby solving the problem of black screens being bright.

[0039] In one embodiment, in order to make the conductive object 501 contact the cross section of the black light shielding layer 101 , the mask of the black light shielding layer 101 partially extends to the edge (cutting edge) of the color filter.

[0040] In one embodiment, in order to make the conductive object 501 contact the cross section of the black light shielding layer 101 , one or four sides of the mask of the black light shielding layer 101 extend to the edge (cutting edge) of the color filter.

[0041] In one embodiment, the present invention further provides a display device, which includes the high-contrast display panel described above.

[0042] In one embodiment, the present invention further provides an electronic device, which includes the above-mentioned display device.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or agreed upon, the terms "setting", "installation", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The terms "upper", "lower", "left", "right" and similar expressions used are for illustrative purposes only and do not represent the only implementation method.

[0044] To summarize, the present invention provides a conductive block at the junction of the color filter substrate and the array substrate. The conductive block connects the back electrode of the color filter substrate to the binding position of the flexible circuit board through a conductive material. The binding position inputs the system ground signal to shield the interference electric field in the external environment and ensure the normal flipping of the liquid crystal. In addition, the black light-shielding layer in the color filter is connected to the system ground through a conductive material. When the black light-shielding layer generates induced charges, the charges are promptly conducted away. The electric potential of the black light-shielding layer is always the same as the system ground, and the common electrode of the array substrate is connected to the system ground. No potential difference can be formed between the black light-shielding layer and the common electrode. This can effectively avoid the interference of the induced charges of the black light-shielding layer on the liquid crystal layer, thereby solving the problem of brightening the black screen.

[0045] The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the scope disclosed by the present invention, which falls within the scope of protection of the present invention.

Claims

1. A high contrast display panel, characterized in that: The invention comprises a color filter substrate, a liquid crystal layer, an array substrate and a flexible circuit board. The color filter substrate and the array substrate are arranged opposite to each other, and the liquid crystal layer is arranged between the color filter substrate and the array substrate. A conductive block is provided at the junction of the color filter substrate and the array substrate. The conductive block connects the back electrode of the color filter substrate to the binding position of the flexible circuit board through a conductive object. The color filter substrate includes a color filter. The black light-shielding layer in the color filter is connected to the system ground through a conductive object. The common electrode of the array substrate is connected to the system ground.

2. The high contrast display panel according to claim 1, wherein: The conductive object contacts the cross section of the black light shielding layer, so that the black light shielding layer is connected to the system ground.

3. The high contrast display panel according to claim 2, wherein: The mask of the black light-shielding layer partially extends to the edge of the color filter.

4. The high contrast display panel according to claim 2, wherein: One or four sides of the mask of the black light-shielding layer extend to the edge of the color filter.

5. The high contrast display panel according to claim 1, wherein: The conductive material is silver paste.

6. The high contrast display panel according to any one of claims 1 to 5, characterized in that: The display screen formed by the color filter substrate, the liquid crystal layer and the array substrate has a display area and a peripheral area. Scan lines or scan line driving circuits are densely arranged on the left and right sides of the display area.

7. The high contrast display panel according to any one of claims 1 to 5, characterized in that: The color filter substrate is provided with a black light shielding layer, an ink layer and a planarization layer on a side opposite to the array substrate, and the ink layer is provided between the black light shielding layer and the planarization layer.

8. The high contrast display panel according to any one of claims 1 to 5, characterized in that: The array substrate is provided with a common electrode, a pixel electrode and a semiconductor layer on a side opposite to the color filter substrate.

9. A display device, characterized in that: The high-contrast display panel comprises the high-contrast display panel according to any one of claims 1 to 8.

10. An electronic device, characterized in that: A display device comprising the display device according to claim 9.

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