LCD panel and LCD display device

Abstract

This invention discloses a liquid crystal display panel and a liquid crystal display device. The liquid crystal display panel includes a graphene heating layer, a color filter substrate, an array substrate disposed opposite to the color filter substrate, and a liquid crystal layer located between the color filter substrate and the array substrate. The graphene heating layer includes a first graphene heating layer disposed on the color filter substrate. By providing a graphene heating layer on the liquid crystal display panel, in the heating mode, the graphene heating layer can generate heat and heat the liquid crystal layer, thereby improving the fluidity of liquid crystal molecules in the liquid crystal layer and thus improving the response speed of the liquid crystal display panel in low-temperature environments, enabling the liquid crystal display panel to operate stably in different temperature environments. Moreover, in the screen-off color-changing mode, the first graphene heating layer applies a corresponding light emission signal, so that the liquid crystal display panel can display the corresponding color.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a liquid crystal display panel and a liquid crystal display device. Background Technology

[0002] Liquid crystal displays (LCDs) have numerous advantages, including thinness, energy efficiency, and no radiation, leading to their widespread use. Examples include LCD televisions, mobile phones, personal digital assistants (PDAs), digital cameras, computer screens, and laptop screens, where they dominate the flat panel display field.

[0003] Traditional liquid crystal displays (LCDs) consist of a color filter substrate (CF), a thin-film transistor array substrate (TFT array substrate), and a liquid crystal layer filling the space between the two substrates. Traditional LCDs achieve color display by using color filters coated with red, green, and blue color resists to filter the monochromatic light (usually white light) provided by the backlight module. Typically, three sub-pixels with the same aperture ratio (red, green, and blue) constitute one pixel. Due to the filtering properties of the color resists, different intensities of red, green, and blue light can be obtained. A color image is then produced by mixing these three primary colors.

[0004] However, the fluidity of liquid crystal molecules is affected by temperature, which in turn affects the response speed of liquid crystal display devices. The lower the temperature, the less fluid the liquid crystal molecules are, and the slower the response speed of the liquid crystal display device. With the increasing development of automotive displays, automotive display devices need to adapt to various environments, especially in low-temperature environments, which pose a significant challenge to the startup of liquid crystal display devices. Therefore, various structural designs are needed for liquid crystal display devices to improve their response speed. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies of the prior art, the present invention aims to provide a liquid crystal display panel and a liquid crystal display device to solve the problem that the response speed of the liquid crystal display device in the prior art is slow in low temperature environment.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] The present invention provides a liquid crystal display panel, comprising a graphene heating layer, a color filter substrate, an array substrate disposed opposite to the color filter substrate, and a liquid crystal layer located between the color filter substrate and the array substrate. The graphene heating layer includes a first graphene heating layer disposed on the color filter substrate.

[0008] In heating mode, a heating signal is applied to each of the first graphene heating layers to heat the liquid crystal layer; in screen-off color-changing mode, a corresponding light-emitting signal is applied to each of the first graphene heating layers to display the corresponding color.

[0009] Furthermore, a first polarizer is provided on the side of the color filter substrate away from the liquid crystal layer, and the first graphene heating layer is disposed between the color filter substrate and the first polarizer.

[0010] Alternatively, the color filter substrate may have a first polarizer and a cover plate on the side away from the liquid crystal layer, with the first graphene heating layer disposed between the first polarizer and the cover plate.

[0011] Furthermore, the first graphene heating layer is disposed on the side of the color filter substrate facing the liquid crystal layer.

[0012] Furthermore, the first graphene heating layer comprises multiple independent graphene blocks, which are arranged in an array.

[0013] In heating mode, all the graphene blocks apply a heating signal to heat the liquid crystal layer; in off-screen mode, each graphene block applies a corresponding light-emitting signal to display a corresponding pattern.

[0014] Furthermore, the color filter substrate is provided with multiple first scan lines, multiple first data lines, multiple first thin-film transistors, and multiple common traces. One end of each graphene block is electrically connected to the first scan line and the first data line adjacent to the first thin-film transistor through the corresponding first thin-film transistor, and the other end of each graphene block is electrically connected to the corresponding common trace.

[0015] Furthermore, the color filter substrate is provided with multiple first scan lines, multiple first data lines, multiple first thin film transistors, multiple electrode blocks, and a common electrode layer. The graphene blocks are disposed between the electrode blocks and the common electrode layer and correspond one-to-one with the electrode blocks. Each electrode block is electrically connected to the first scan line and the first data line adjacent to the first thin film transistor through the corresponding first thin film transistor.

[0016] Furthermore, the graphene heating layer includes a second graphene heating layer, which is disposed on the array substrate;

[0017] In heating mode, a heating signal is applied to the second graphene heating layer to heat the liquid crystal layer.

[0018] Furthermore, a second polarizer is provided on the side of the array substrate away from the liquid crystal layer, and the second graphene heating layer is disposed between the array substrate and the second polarizer;

[0019] Alternatively, the second graphene heating layer may be disposed on the side of the array substrate facing the liquid crystal layer.

[0020] Furthermore, the graphene heating layer has a grid structure and corresponds to the black matrix on the color filter substrate.

[0021] This application also provides a liquid crystal display device, including the liquid crystal display panel as described above.

[0022] The beneficial effects of this invention are as follows: by setting a graphene heating layer on the liquid crystal display panel, in the heating mode, the graphene heating layer can generate heat and heat the liquid crystal layer, thereby improving the fluidity of liquid crystal molecules in the liquid crystal layer, thus improving the response speed of the liquid crystal display panel in low-temperature environments, so that the liquid crystal display panel can operate stably in different temperature environments; moreover, the graphene heating layer includes a first graphene heating layer disposed on the color filter substrate, and in the screen-off color-changing mode, the first graphene heating layer applies a corresponding light emission signal so that the liquid crystal display panel can display the corresponding color. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the liquid crystal display device in the dark state according to Embodiment 1 of the present invention.

[0024] Figure 2 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment 1 of the present invention.

[0025] Figure 3 This is one of the circuit structure diagrams of the liquid crystal display device in Embodiment 1 of the present invention.

[0026] Figure 4 This is the second schematic diagram of the circuit structure of the liquid crystal display device in Embodiment 1 of the present invention.

[0027] Figure 5 This is a schematic diagram of the heating simulation of the graphene thin film layer in Embodiment 1 of the present invention.

[0028] Figure 6 This is a schematic diagram of the light emission simulation of the graphene thin film layer in Embodiment 1 of the present invention.

[0029] Figure 7 This is a schematic diagram of the planar structure of the color filter substrate in Embodiment 1 of the present invention.

[0030] Figure 8 This is a schematic diagram of the planar structure of the array substrate in Embodiment 1 of the present invention.

[0031] Figure 9 This is a schematic diagram of the liquid crystal display device in the dark state in Embodiment 2 of the present invention.

[0032] Figure 10 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment 2 of the present invention.

[0033] Figure 11 This is a schematic diagram of the circuit structure of the liquid crystal display device in Embodiment 2 of the present invention.

[0034] Figure 12 This is a schematic diagram of the liquid crystal display device in the dark state in Embodiment 3 of the present invention.

[0035] Figure 13 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment 3 of the present invention.

[0036] Figure 14 This is a schematic diagram of the circuit structure of the liquid crystal display device in Embodiment 3 of the present invention.

[0037] Figure 15 This is a schematic diagram of the liquid crystal display device in the dark state according to Embodiment 4 of the present invention.

[0038] Figure 16 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment 4 of the present invention.

[0039] Figure 17 This is a schematic diagram of the circuit structure of the liquid crystal display device in Embodiment 4 of the present invention.

[0040] Figure 18 This is a schematic diagram of the liquid crystal display device in the dark state in Embodiment 5 of the present invention.

[0041] Figure 19 This is a schematic diagram of the liquid crystal display device in the dark state in Embodiment Six of the present invention.

[0042] Figure 20 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment Six of the present invention.

[0043] Figure 21 This is a schematic diagram of the circuit planar structure of the color filter substrate in Embodiment Six of the present invention.

[0044] Figures 22a to 22dThis is a schematic diagram of the fabrication process of the first graphene heating layer on the color filter substrate in Embodiment Six of the present invention.

[0045] Figure 23 This is a schematic diagram of the liquid crystal display device in the dark state in Embodiment 7 of the present invention.

[0046] Figure 24 This is a schematic diagram of the circuit planar structure of the color filter substrate in Embodiment 7 of the present invention. Detailed Implementation

[0047] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the following detailed description, in conjunction with the accompanying drawings and preferred embodiments, provides a detailed explanation of the specific implementation methods, structures, features, and effects of the liquid crystal display panel and liquid crystal display device proposed according to the present invention:

[0048] [Example 1]

[0049] Figure 1 This is a schematic diagram of the liquid crystal display device in the dark state according to Embodiment 1 of the present invention. Figure 2 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment 1 of the present invention. Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a liquid crystal display panel, including a graphene heating layer 40, a color filter substrate 10, an array substrate 20 disposed opposite to the color filter substrate 10, and a liquid crystal layer 30 located between the color filter substrate 10 and the array substrate 20. The graphene heating layer 40 is used to heat the liquid crystal layer 30. The graphene heating layer 40 is a planar structure that covers the entire surface of the liquid crystal display panel, thereby enabling the graphene heating layer 40 to generate heat and heat the liquid crystal layer 30, thereby improving the fluidity of the liquid crystal molecules in the liquid crystal layer 30, and thus improving the response speed of the liquid crystal display panel in low-temperature environments, so that the liquid crystal display panel can operate stably in different temperature environments.

[0050] In this embodiment, the graphene heating layer 40 includes a first graphene heating layer 41, which is disposed on the color filter substrate 10 and covers the entire planar structure of the color filter substrate 10. In heating mode, the first graphene heating layer 41 applies a heating signal to heat the liquid crystal layer 30; in screen-off color-changing mode, the first graphene heating layer 41 applies a corresponding light-emitting signal to display the corresponding color. Thus, in heating mode, the color filter substrate 10 can be heated and the heat transferred to the liquid crystal layer 30; while in screen-off color-changing mode, the first graphene heating layer 41 applies a corresponding light-emitting signal so that the liquid crystal display panel can display the corresponding color.

[0051] In one embodiment, a first polarizer 51 is provided on the side of the color filter substrate 10 away from the liquid crystal layer 30, and a first graphene heating layer 41 is disposed between the color filter substrate 10 and the first polarizer 51, thereby enabling the first polarizer 51 to provide good protection for the first graphene heating layer 41. Optionally, a second polarizer 52 is provided on the side of the array substrate 20 away from the liquid crystal layer 30, and the transmission axis of the first polarizer 51 and the transmission axis of the second polarizer 52 are perpendicular to each other.

[0052] In this embodiment, the graphene heating layer 40 is a thin film structure made of graphene material, that is, the first heating layer 41 can be made of graphene material. Since the graphene thin film layer is almost completely transparent, absorbing only 2.3% of the light, that is, with a light transmittance of 97.7%, it will not affect the normal display of the liquid crystal display panel. Figure 5 This is a schematic diagram of the heating simulation of the graphene thin film layer in Embodiment 1 of the present invention. Figure 5 As shown, the heating principle of graphene is mainly based on its unique physical and chemical properties. Heat is generated through the movement and friction of carbon atom clusters under the influence of an electric field, and released in the form of far-infrared radiation. Graphene is a two-dimensional material composed of a single layer of tightly packed carbon atoms, possessing extremely high electrical and thermal conductivity. Under the influence of an electric field, the carbon atom clusters in the heating element undergo Brownian motion, resulting in intense friction and collisions between the carbon atoms. The generated heat energy is transferred outward in the form of far-infrared radiation, with an effective total electrothermal energy conversion rate exceeding 99%. These properties of graphene make it excellent in heating applications, exhibiting not only high heating efficiency but also uniform and stable heating. Graphene is a novel material with a single-layer two-dimensional honeycomb lattice structure formed by tightly packed sp-hybridized carbon atoms. The temperature rise rate of the graphene heating element ( Figure 5 The solid curve is greater than the temperature rise rate of the resistance wire heating element. Figure 5 (Middle dashed curve) High. When heated for 1 minute, the temperature of the graphene heating element sample can rise from 25℃ to about 80℃.

[0053] Figure 6 This is a schematic diagram of the light emission simulation of the graphene thin film layer in Embodiment 1 of the present invention. Figure 6As shown, when different voltages are applied to the graphene film layer, it can emit light of different colors. This allows for the application of corresponding electrical signals to the first graphene heating layer 41 to emit light of the corresponding color, achieving a color-changing display when the screen is off. A light-emitting material is prepared using the interface of two different forms of graphene. The partially reduced graphene oxide at the interface between graphene oxide (GO) and reduced graphene oxide (rGO) has a series of discrete energy levels, emitting different colors of light when different voltages are applied, almost covering the entire visible spectrum. When the graphene film layer emits light, it also emits a small amount of heat, but the electrical energy is mainly converted into light energy; while when the graphene film layer heats up, almost all electrical energy is converted into heat energy. The voltage applied to the graphene film layer during emission and heating is different, with the voltage applied during heating being much greater than the voltage applied during emission.

[0054] Figure 3 This is one of the circuit structure diagrams of the liquid crystal display device in Embodiment 1 of the present invention. Figure 4 This is a second schematic diagram of the circuit structure of the liquid crystal display device in Embodiment 1 of the present invention. Figure 3 and Figure 4 As shown, in this embodiment, the liquid crystal display panel includes a first circuit board 71 and a second circuit board 72. The first circuit board 71 is electrically connected to the array substrate 20 to apply a corresponding electrical signal to the array substrate 20; the second circuit board 72 is electrically connected to the color filter substrate 10 to apply a corresponding electrical signal to the first graphene heating layer 41. Wherein, as... Figure 3 As shown, the first circuit board 71 is a PCBA (Printed Circuit Board Assembly), and the second circuit board 72 is an FPC (Flexible Printed Circuit). The second circuit board 72 can be bonded to the first circuit board 71, thereby applying corresponding electrical signals to the array substrate 20 and the second circuit board 72 together through the first circuit board 71. Figure 4 As shown, of course, the first circuit board 71 and the second circuit board 72 can both be PCBA (Printed Circuit Board Assembly), that is, the first circuit board 71 and the second circuit board 72 are respectively bound to the control circuit.

[0055] Figure 7 This is a schematic diagram of the planar structure of the color filter substrate in Embodiment 1 of the present invention. Figure 7 As shown, the color filter substrate 10 has a black matrix 11 and a color resist layer 12 on the side facing the liquid crystal layer 30. The black matrix 11 is used to separate the multiple color resist layers 12 from each other. The color resist layer 12 includes color group materials of red (R), green (G) and blue (B) to correspond to the red, green and blue pixels respectively.

[0056] Figure 8 This is a schematic diagram of the planar structure of the array substrate in Embodiment 1 of the present invention. Figure 8 As shown, the array substrate 20, facing the liquid crystal layer 30, has a plurality of second pixel units P2 formed by multiple second scan lines 201 and multiple second data lines 202 that are mutually insulated and intersecting. Each second pixel unit P2 has a pixel electrode 22 and a second thin-film transistor 203. The pixel electrode 22 is electrically connected to the second data line 202 adjacent to the second thin-film transistor 203 through the second thin-film transistor 203. The second thin-film transistor 203 includes a second gate, a second active layer, a second drain, and a second source. The second gate and the second scan lines 201 are located on the same layer and are electrically connected. The second gate and the second active layer are isolated by an insulating layer. The second source is electrically connected to the second data line 202. The second drain is electrically connected to the pixel electrode 22 through a contact hole.

[0057] In this embodiment, a common electrode 21 is further provided on the side of the array substrate 20 facing the liquid crystal layer 30. The common electrode 21 and the pixel electrode 22 are located on different layers and are insulated from each other by an insulating layer. The common electrode 21 may be located above or below the pixel electrode 22. Figure 1 The diagram shows the common electrode 21 located below the pixel electrode 22. Preferably, the common electrode 21 is a planar electrode with its entire surface, and the pixel electrode 22 is a slit electrode with multiple electrode strips in each pixel unit to form a fringe field switching (FFS) mode. Of course, in other embodiments, the pixel electrode 22 and the common electrode 21 may be located on the same layer, but they are insulated from each other. Both the pixel electrode 22 and the common electrode 21 may include multiple electrode strips, and the electrode strips of the pixel electrode 22 and the common electrode 21 are arranged alternately to form an in-plane switching (IPS) mode. Alternatively, in other embodiments, the array substrate 20 has the pixel electrode 22 on the side facing the liquid crystal layer 30, and the color filter substrate 10 has the common electrode 21 on the side facing the liquid crystal layer 30 to form a TN mode or a VA mode. For further descriptions of the TN mode and VA mode, please refer to the prior art, which will not be repeated here.

[0058] The color filter substrate 10 and the array substrate 20 can be made of materials such as glass, acrylic, and polycarbonate. The common electrode 21 and the pixel electrode 22 can be made of materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0059] This application also provides a liquid crystal display device, including a backlight module 60 and a liquid crystal display panel as described above. The liquid crystal display panel is disposed on the light-emitting side of the backlight module 60, so that the backlight module 60 can provide a backlight source for the liquid crystal display panel.

[0060] [Example 2]

[0061] Figure 9 This is a schematic diagram of the liquid crystal display device in the dark state in Embodiment 2 of the present invention. Figure 10 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment 2 of the present invention. Figure 11 This is a schematic diagram of the circuit structure of the liquid crystal display device in Embodiment 2 of the present invention. Figures 9 to 11 As shown, the liquid crystal display panel and liquid crystal display device provided in Embodiment 2 of the present invention are similar to those in Embodiment 1. Figures 1 to 8 The LCD panel and LCD display device in the original are basically the same, the difference being:

[0062] In this embodiment, a first polarizer 51 and a cover plate 80 are provided on the side of the color filter substrate 10 away from the liquid crystal layer 30, and a first graphene heating layer 41 is disposed between the first polarizer 51 and the cover plate 80. The first graphene heating layer 41 can cover the surface of the cover plate 80 facing the first polarizer 51. Since the area of ​​the cover plate 80 is usually larger than the area of ​​the color filter substrate 10, it facilitates the bonding of the first graphene heating layer 41 to the second circuit board 72.

[0063] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0064] [Example 3]

[0065] Figure 12 This is a schematic diagram of the liquid crystal display device in the dark state in Embodiment 3 of the present invention. Figure 13 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment 3 of the present invention. Figure 14 This is a schematic diagram of the circuit structure of the liquid crystal display device in Embodiment 3 of the present invention. Figure 12 and Figure 14 As shown, the liquid crystal display panel and liquid crystal display device provided in Embodiment 3 of the present invention are similar to those in Embodiment 1. Figures 1 to 8 Example 2 Figures 9 to 11 The LCD panel and LCD display device in the original are basically the same, the difference being:

[0066] In this embodiment, the graphene heating layer 40 includes a second graphene heating layer 42, which is disposed on the array substrate 20. A first graphene heating layer 41 is disposed on the color filter substrate 10, and a second graphene heating layer 42 is disposed on the array substrate 20. In the heating mode, both the first graphene heating layer 41 and the second graphene heating layer 42 are subjected to heating signals to heat the liquid crystal layer 30. By using dual graphene heating layers to heat the liquid crystal display panel, the heating rate of the liquid crystal layer 30 can be improved. Since the array substrate 20 is the side away from the external environment, in the screen-off color-changing mode, only the corresponding light-emitting signal needs to be applied to the first graphene heating layer 41 to display the corresponding color, while no electrical signal is applied to the second graphene heating layer 42.

[0067] Optionally, a second polarizer 52 is provided on the side of the array substrate 20 away from the liquid crystal layer 30, and a second graphene heating layer 42 is disposed between the array substrate 20 and the second polarizer 52, so that the second polarizer 52 can provide good protection for the second graphene heating layer 42. The second graphene heating layer 42 is a graphene thin film layer, meaning that the first graphene heating layer 41 can be made of graphene material.

[0068] like Figure 14 As shown, the liquid crystal display panel includes a third circuit board 73, which is electrically connected to the second graphene heating layer 42 to apply corresponding electrical signals to the second graphene heating layer 42. Wherein, as... Figure 14 As shown, the first circuit board 71 is a PCBA (Printed Circuit Board Assembly), and the second circuit board 72 and the third circuit board 73 are both FPCs (Flexible Printed Circuits). The second circuit board 72 and the third circuit board 73 can both be bonded to the first circuit board 71, thereby applying corresponding electrical signals to the array substrate 20, the second circuit board 72, and the third circuit board 73 together through the first circuit board 71. Of course, in other embodiments, the first circuit board 71, the second circuit board 72, and the third circuit board 73 can also all be PCBAs (Printed Circuit Board Assemblies), that is, the first circuit board 71, the second circuit board 72, and the third circuit board 73 are respectively bonded to the control circuit.

[0069] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be repeated here.

[0070] [Example 4]

[0071] Figure 15This is a schematic diagram of the liquid crystal display device in the dark state according to Embodiment 4 of the present invention. Figure 16 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment 4 of the present invention. Figure 17 This is a schematic diagram of the circuit structure of the liquid crystal display device in Embodiment 4 of the present invention. Figures 15 to 17 As shown, the liquid crystal display panel and liquid crystal display device provided in Embodiment 4 of the present invention are similar to those in Embodiment 1. Figures 1 to 8 Example 2 Figures 9 to 11 Example 3 Figures 12 to 14 The LCD panel and LCD display device in the original are basically the same, the difference being:

[0072] In this embodiment, the first graphene heating layer 41 is disposed on the side of the color filter substrate 10 facing the liquid crystal layer 30, and the second graphene heating layer 42 is disposed on the side of the array substrate 20 facing the liquid crystal layer 30. This allows the first graphene heating layer 41 and the second graphene heating layer 42 to be closer to the liquid crystal layer 30, facilitating rapid heating of the liquid crystal layer 30. Of course, in other embodiments, only the first graphene heating layer 41 may be disposed on the side of the color filter substrate 10 facing the liquid crystal layer 30; or only the second graphene heating layer 42 may be disposed on the side of the array substrate 20 facing the liquid crystal layer 30.

[0073] Further, such as Figure 16 As shown, the liquid crystal display panel includes a first circuit board 71 and conductive pillars 74. One end of the conductive pillars 74 is electrically connected to the first graphene heating layer 41, and the other end is electrically connected to the first circuit board 71. That is, the first graphene heating layer 41 can be connected to the first circuit board 71 by AU dotting or silver paste application. This allows the first circuit board 71 to apply corresponding electrical signals to the first graphene heating layer 41, the second graphene heating layer 42, and the array substrate 20. Therefore, there is no need to set up a second circuit board 72 and a third circuit board 73, thus simplifying the circuit structure of the liquid crystal display panel.

[0074] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, Embodiment 2, and Embodiment 3, and will not be repeated here.

[0075] [Example 5]

[0076] Figure 18 This is a schematic diagram of the liquid crystal display device in the dark state according to Embodiment 5 of the present invention. Figure 18 As shown, the liquid crystal display panel and liquid crystal display device provided in Embodiment 4 of the present invention are similar to those in Embodiment 1. Figures 1 to 8 Example 2 Figures 9 to 11 Example 3 Figures 12 to 14 Example 3 Figures 15 to 17The LCD panel and LCD display device in the original are basically the same, the difference being:

[0077] The graphene heating layer 40 has a grid structure and corresponds to the black matrix 11 on the color filter substrate 10. In this embodiment, both the first graphene heating layer 41 and the second graphene heating layer 42 have grid structures and correspond to the black matrix 11 on the color filter substrate 10. Although the graphene heating layer 40 is a transparent material, its light transmittance can only reach 97.7%, which cannot achieve 100% transparency. Therefore, the graphene heating layer 40 will still absorb some light. By setting both the first graphene heating layer 41 and the second graphene heating layer 42 to a grid structure corresponding to the black matrix 11 on the color filter substrate 10, the influence on light transmittance can be avoided.

[0078] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4, and will not be repeated here.

[0079] [Example 6]

[0080] Figure 19 This is a schematic diagram of the liquid crystal display device in the dark state in Embodiment Six of the present invention. Figure 20 This is a schematic diagram of the liquid crystal display device in the bright state according to Embodiment Six of the present invention. Figure 21 This is a schematic diagram of the circuit planar structure of the color filter substrate in Embodiment Six of the present invention. Figures 19 to 21 As shown, the liquid crystal display panel and liquid crystal display device provided in Embodiment Six of the present invention are similar to those in Embodiment One. Figures 1 to 8 Example 2 Figures 9 to 11 Example 3 Figures 12 to 14 Example 4 Figures 15 to 17 The LCD panel and LCD display device in the original are basically the same, the difference being:

[0081] In this embodiment, the first graphene heating layer 41 includes a plurality of independent graphene blocks 411, which are arranged in an array. Each graphene block 411 corresponds to a first pixel unit P1. The first pixel unit P1 can correspond one-to-one with a second pixel unit P2, or one first pixel unit P1 can correspond to multiple second pixel units P2, or multiple first pixel units P1 can correspond to one second pixel unit P2.

[0082] In heating mode, all graphene blocks 411 apply a heating signal to heat the liquid crystal layer 30; in screen-off display mode, each graphene block 411 applies a corresponding light-emitting signal to display a corresponding pattern, such as a wood grain pattern, so that the liquid crystal display device can be integrated with the wood grain of the car's center console to achieve a hidden display.

[0083] In this embodiment, as Figure 20 As shown, the color filter substrate 10 is provided with multiple first scan lines 101, multiple first data lines 102, multiple first thin-film transistors 103, and multiple common traces 104. The multiple first scan lines 101 and multiple first data lines 102 are mutually insulated and intersecting to form multiple first pixel units P1. Each first pixel unit P1 is provided with a graphene block 411 and a first thin-film transistor 103. One end of each graphene block 411 is electrically connected to the first scan line 101 and the first data line 102 adjacent to the first thin-film transistor 103 through the corresponding first thin-film transistor 103. The other end of each graphene block 411 is electrically connected to the corresponding common trace 104. The first data lines 102 are used to apply a positive voltage to the corresponding graphene block 411, and the common trace 104 is used to apply a negative voltage to the graphene block 411, thereby controlling each graphene block 411 to generate heat or emit light. The first thin-film transistor 103 includes a first gate, a first active layer, a first drain, and a first source. The first gate and the first scan line 101 are located on the same layer and are electrically connected. The first gate and the first active layer are isolated by an insulating layer. The first source is electrically connected to the first data line 102. The first drain is electrically connected to the graphene block 411 through a contact hole.

[0084] In other embodiments, the first graphene heating layer 41, the first scan line 101, the first data line 102, the first thin-film transistor 103, and the common trace 104 are all disposed on the side of the black matrix 11 facing the liquid crystal layer 30. In the projection direction of the array substrate 20, the first scan line 101 coincides with the second scan line 201, the first data line 102 coincides with the second data line 202, and the first thin-film transistor 103 coincides with the second thin-film transistor 203. This allows the black matrix 11 to block the first scan line 101, the first data line 102, the first thin-film transistor 103, and the common trace 104, preventing metallic reflections that could affect the display effect of the image.

[0085] Figures 22a to 22d This is a schematic diagram illustrating the fabrication process of the first graphene heating layer on the color filter substrate in Embodiment Six of the present invention. Figures 22a to 22d As shown, the method for fabricating the first graphene heating layer 41 in this embodiment includes:

[0086] like Figure 22a As shown, a first graphene heating layer 41 and a photoresist layer 1 are covered on the surface of the color filter substrate 10.

[0087] like Figure 22b As shown, a patterned mask is used as a shield to expose and develop the photoresist layer 1, so that the photoresist layer 1 becomes a patterned structure.

[0088] like Figure 22c As shown, the first graphene heating layer 41 is etched by using the patterned photoresist layer 1 as a mask, thereby turning the first graphene heating layer 41 into multiple graphene blocks 411. Multiple graphene blocks 411 are provided on the entire surface of the color filter substrate 10.

[0089] like Figure 22d As shown, the photoresist layer 1 is then peeled off, and a planarization layer 14 is applied to the surface of the color filter substrate 10 to cover the graphene block 411, thereby making the surface of the color filter substrate 10 smoother. The surface of the color filter substrate 10 also has a first scan line 101, a first data line 102, a first thin-film transistor 103, and a common trace 104. The fabrication methods for the first scan line 101, the first data line 102, the first thin-film transistor 103, and the common trace 104 can be found in existing technologies.

[0090] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4, and will not be repeated here.

[0091] [Example 6]

[0092] Figure 23 This is a schematic diagram of the liquid crystal display device in the dark state in Embodiment 7 of the present invention. Figure 24 This is a schematic diagram of the circuit planar structure of the color filter substrate in Embodiment 7 of the present invention. Figures 23 to 24 As shown, the liquid crystal display panel and liquid crystal display device provided in Embodiment Six of the present invention are similar to those in Embodiment One. Figures 1 to 8 Example 2 Figures 9 to 11 Example 3 Figures 12 to 14 Example 4 Figures 15 to 17 The LCD panel and LCD display device in the original are basically the same, the difference being:

[0093] In this embodiment, the first graphene heating layer 41 includes a plurality of independent graphene blocks 411, which are arranged in an array. Each graphene block 411 corresponds to a first pixel unit P1. The first pixel unit P1 can correspond one-to-one with a second pixel unit P2, or one first pixel unit P1 can correspond to multiple second pixel units P2, or multiple first pixel units P1 can correspond to one second pixel unit P2.

[0094] In heating mode, all graphene blocks 411 apply a heating signal to heat the liquid crystal layer 30; in screen-off display mode, each graphene block 411 applies a corresponding light-emitting signal to display a corresponding pattern, such as a wood grain pattern, so that the liquid crystal display device can be integrated with the wood grain of the car's center console to achieve a hidden display.

[0095] In this embodiment, as Figure 23 and Figure 24 As shown, the color filter substrate 10 is provided with multiple first scan lines 101, multiple first data lines 102, multiple first thin-film transistors 103, multiple electrode blocks 412, and a common electrode layer 413. Graphene blocks 411 are disposed between the electrode blocks 412 and the common electrode layer 413 and correspond one-to-one with the electrode blocks 412. Each electrode block 412 is electrically connected to the first scan line 101 and the first data line 102 adjacent to the first thin-film transistor 103 through the corresponding first thin-film transistor 103. The first data line 102 is used to apply a positive voltage to the corresponding graphene block 411 through the electrode block 412, and the common electrode layer 413 is used to apply a negative voltage to the graphene block 411, thereby controlling each graphene block 411 to generate heat or emit light. By applying electrical signals to the graphene block 411 through the electrode block 412 and the common electrode layer 413, the heating and light-emitting effects of the graphene block 411 can be increased. The first thin-film transistor 103 includes a first gate, a first active layer, a first drain, and a first source. The first gate and the first scan line 101 are located on the same layer and are electrically connected. The first gate and the first active layer are isolated by an insulating layer. The first source is electrically connected to the first data line 102. The first drain is electrically connected to the graphene block 411 through a contact hole. The common electrode layer 413 can be a planar electrode formed over its entire surface, or it can be a block electrode corresponding to the graphene block 411. All the block electrodes are connected together by wires.

[0096] In other embodiments, the first scan line 101, the first data line 102, the first thin-film transistor 103, the graphene block 411, the electrode block 412, and the common electrode layer 413 are all disposed on the side of the black matrix 11 facing the liquid crystal layer 30. In the projection direction of the array substrate 20, the first scan line 101 coincides with the second scan line 201, the first data line 102 coincides with the second data line 202, and the first thin-film transistor 103 coincides with the second thin-film transistor 203. This allows the black matrix 11 to block the first scan line 101, the first data line 102, and the first thin-film transistor 103, preventing metallic reflections that could affect the display effect of the image.

[0097] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4, and will not be repeated here.

[0098] In this document, the directional terms such as up, down, left, right, front, and back are defined according to the position of the structures in the accompanying drawings and the relative positions of the structures, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein are only used for distinction in name and are not used to limit the number or order.

[0099] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present invention, which are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A liquid crystal display panel, characterized in that, The system includes a graphene heating layer (40), a color filter substrate (10), an array substrate (20) disposed opposite to the color filter substrate (10), and a liquid crystal layer (30) located between the color filter substrate (10) and the array substrate (20). The graphene heating layer (40) includes a first graphene heating layer (41) disposed on the color filter substrate (10). In the heating mode, the first graphene heating layer (41) is subjected to a heating signal to heat the liquid crystal layer (30); in the screen-off color-changing mode, the first graphene heating layer (41) is subjected to a corresponding light-emitting signal to display the corresponding color.

2. The liquid crystal display panel according to claim 1, characterized in that, The color filter substrate (10) has a first polarizer (51) on the side away from the liquid crystal layer (30), and the first graphene heating layer (41) is disposed between the color filter substrate (10) and the first polarizer (51). Alternatively, the color filter substrate (10) may have a first polarizer (51) and a cover plate (80) on the side away from the liquid crystal layer (30), and the first graphene heating layer (41) may be disposed between the first polarizer (51) and the cover plate (80).

3. The liquid crystal display panel according to claim 1, characterized in that, The first graphene heating layer (41) is disposed on the side of the color filter substrate (10) facing the liquid crystal layer (30).

4. The liquid crystal display panel according to claim 1, characterized in that, The first graphene heating layer (41) includes a plurality of independent graphene blocks (411), which are arranged in an array. In the heating mode, all the graphene blocks (411) apply a heating signal to heat the liquid crystal layer (30); in the off-screen display mode, each graphene block (411) applies a corresponding light-emitting signal to display a corresponding pattern.

5. The liquid crystal display panel according to claim 4, characterized in that, The color filter substrate (10) is provided with multiple first scan lines (101), multiple first data lines (102), multiple first thin film transistors (103), and multiple common traces (104). One end of each graphene block (411) is electrically connected to the first scan line (101) and the first data line (102) adjacent to the first thin film transistor (103) through the corresponding first thin film transistor (103), and the other end of each graphene block (411) is electrically connected to the corresponding common trace (104).

6. The liquid crystal display panel according to claim 4, characterized in that, The color filter substrate (10) is provided with multiple first scan lines (101), multiple first data lines (102), multiple first thin film transistors (103), multiple electrode blocks (412), and a common electrode layer (413). The graphene block (411) is disposed between the electrode block (412) and the common electrode layer (413) and corresponds one-to-one with the electrode block (412). Each electrode block (412) is electrically connected to the first scan line (101) and the first data line (102) adjacent to the first thin film transistor (103) through the corresponding first thin film transistor (103).

7. The liquid crystal display panel according to claim 1, characterized in that, The graphene heating layer (40) includes a second graphene heating layer (42), which is disposed on the array substrate (20). In heating mode, the second graphene heating layer (42) is subjected to a heating signal to heat the liquid crystal layer (30).

8. The liquid crystal display panel according to claim 7, characterized in that, The array substrate (20) has a second polarizer (52) on the side away from the liquid crystal layer (30), and the second graphene heating layer (42) is disposed between the array substrate (20) and the second polarizer (52). Alternatively, the second graphene heating layer (42) is disposed on the side of the array substrate (20) facing the liquid crystal layer (30).

9. The liquid crystal display panel according to claim 1, characterized in that, The graphene heating layer (40) has a grid structure and corresponds to the black matrix (11) on the color filter substrate (10).

10. A liquid crystal display device, characterized in that, Including the liquid crystal display panel as described in any one of claims 1-9.

Images