Transflective display device and driving method
By employing a metal wire grid polarizer and color resist layer in a transflective display device, combined with positive liquid crystal molecules and dye molecules, thin-film transmissive and reflective displays are achieved, solving the cell thickness problem, and displaying color and black-and-white images in transmissive and reflective modes respectively.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KUSN INFOVISION OPTOELECTRONICS
- Filing Date
- 2026-04-08
- Publication Date
- 2026-06-05
AI Technical Summary
Existing transflective display devices are too thick to achieve color transmissive display and black-and-white reflective display.
By employing a design of metal wire grid polarizer and color resist layer, combined with positive liquid crystal molecules and dye molecules, the transmission and reflection display modes are switched by controlling the alignment direction of liquid crystal molecules and light polarization, and the light source is provided by ambient light and backlight respectively.
It achieves a thin transflective display device that can display color images in transmissive mode and black and white images in reflective mode, meeting the needs of conventional color display and electronic paper display modes.
Smart Images
Figure CN122151401A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of displays, and in particular to a transflective display device and its driving method. Background Technology
[0002] With the development of display technology, thin and light display panels are increasingly favored by consumers, especially thin and light display panels (liquid crystal display, LCD). One existing display panel includes a thin film transistor array substrate (TFT array substrate), a color filter substrate (CF substrate), and liquid crystal molecules filled between the TFT array substrate and the color filter substrate. When this display panel is working, driving voltages are applied to the TFT array substrate and the color filter substrate respectively, controlling the rotation direction of the liquid crystal molecules between the two substrates to refract the backlight provided by the backlight module of the display panel, thereby displaying the image. However, this type of display panel requires the backlight module to be constantly on to display normally, resulting in high power consumption.
[0003] To reduce power consumption, electronic paper displays (reflective displays) have become a popular choice. Unlike LCDs, which require a backlight, electronic paper displays can use external light sources to display images. Therefore, even in strong sunlight, the information on the electronic paper remains clearly visible without viewing angle issues. Furthermore, due to their energy efficiency, high reflectivity, and high contrast ratio, electronic paper displays are now widely used in e-readers (such as e-books and e-newspapers) and other electronic components (such as price tags). Existing electronic paper displays typically employ E-Ink microcapsule technology (microcapsule electronic ink technology), SiPix microcup technology (microcup electrophoretic display technology), Bridgestone electronic liquid powder technology, cholesteric liquid crystal display (CLCD) technology, microelectromechanical systems (MEMS) technology, or electrowetting technology. However, current electronic paper display technology is less mature than LCD technology, resulting in lower mass production efficiency, higher manufacturing costs, and the inability to achieve color display.
[0004] To combine the advantages of transmissive display panels and electronic paper displays, transflective display devices have emerged in the prior art. These devices can utilize both ambient light and backlight for display. When the external light source is weak, the backlight can be turned on for light compensation, thus enabling normal display. However, existing transflective display devices typically require a dual liquid crystal cell with a quarter-wave plate to achieve the transflective effect, resulting in a thicker cell and higher manufacturing costs. Furthermore, they display color images in both transmissive and reflective modes, failing to achieve a color image during transmission and a black-and-white image during reflection to meet the requirements of electronic paper display modes. Summary of the Invention
[0005] In order to overcome the shortcomings and deficiencies of the prior art, the present invention aims to provide a transflective display device and driving method to solve the problems of the thick cell of the transflective display device in the prior art and the inability to achieve color transmission display and black and white reflection display.
[0006] The objective of this invention is achieved through the following technical solution: The present invention provides a transflective display device, including a backlight module and a display panel stacked on the light-emitting side of the backlight module; The display panel includes an opposing substrate, an array substrate disposed opposite to the opposing substrate, and a liquid crystal layer located between the opposing substrate and the array substrate. The array substrate is located on the side of the opposing substrate closer to the backlight module. The array substrate is provided with pixel electrodes and a metal wire grid polarizer formed by multiple parallel and spaced metal wire grids. The display panel has pixel units that correspond one-to-one with the pixel electrodes. The projection of the metal wire grid polarizer on the array substrate covers all the pixel units. The opposing substrate has a first common electrode on the side facing the liquid crystal layer that cooperates with the pixel electrodes. The transflective display device further includes a color resist layer, which is located on the side of the metal wire grid polarizer facing the backlight module, and the pixel unit corresponds one-to-one with the color resist layer; In black-and-white reflective display mode, the backlight module is turned off, and the metal wire grid polarizer reflects ambient light and is used to provide a display light source for the display panel; in color transmissive display mode, the backlight module is turned on and is used to provide a display light source for the display panel.
[0007] Furthermore, the liquid crystal layer uses positive liquid crystal molecules, and the alignment direction of the liquid crystal layer is parallel to the opposing substrate and the array substrate. The alignment direction of the liquid crystal layer on the side closer to the opposing substrate is perpendicular to the alignment direction on the side closer to the array substrate. An upper polarizer is provided on the opposing substrate. The light transmission axis of the metal wire grid polarizer is perpendicular to the light transmission axis of the upper polarizer, and the reflection axis of the metal wire grid polarizer is parallel to the light transmission axis of the upper polarizer.
[0008] Furthermore, the liquid crystal layer comprises liquid crystal molecules and dye molecules mixed together, the liquid crystal molecules are positive liquid crystal molecules, the alignment direction of the liquid crystal layer is parallel to the opposing substrate and the array substrate, and the alignment direction of the liquid crystal layer on the side closer to the opposing substrate is perpendicular to the alignment direction on the side closer to the array substrate.
[0009] Furthermore, the color resist layer is located on the side of the array substrate facing the liquid crystal layer, and the color resist layer is reused as a planarization layer on the array substrate; Alternatively, the color resist layer may be disposed on the side of the array substrate away from the liquid crystal layer.
[0010] Furthermore, the transflective display device also includes a color filter substrate, which is located between the backlight module and the array substrate, and the color resist layer is disposed on the color filter substrate.
[0011] Furthermore, a reflective polarizer is provided on the side of the array substrate away from the liquid crystal layer. The transmission axis of the reflective polarizer is parallel to the transmission axis of the metal wire grid polarizer, and the reflection axis of the reflective polarizer is parallel to the reflection axis of the metal wire grid polarizer. Alternatively, a refractive medium layer is provided on the side of the array substrate away from the liquid crystal layer. The refractive medium layer can transmit light emitted by the backlight module and perform total internal reflection on ambient light with an incident angle greater than a preset angle. The refractive medium layer includes a first refractive layer and a second refractive layer stacked on top of each other. The first refractive layer includes multiple protrusion structures. The first refractive layer is located on the side of the second refractive layer away from the array substrate. The refractive index of the second refractive layer is greater than that of the first refractive layer.
[0012] Furthermore, the metal wire grid polarizer is located on the surface of the pixel electrode facing the liquid crystal layer and is disconnected between adjacent pixel units; Alternatively, a second common electrode is provided on the array substrate. The second common electrode is located on the side of the pixel electrode away from the liquid crystal layer and is used to form a storage capacitor between the pixel electrode and the pixel electrode. The metal wire grid polarizer is located on the surface of the second common electrode facing the liquid crystal layer.
[0013] Furthermore, the transflective display device also includes a black matrix disposed on the same layer as the color resist layer, the black matrix being used to separate the multiple color resist layers from each other.
[0014] This application also provides a driving method for a transflective display device, used to drive the transflective display device as described above, the driving method comprising: In the black and white reflective display mode, the backlight module is turned off and a first gamma driving signal is applied to the display panel to control the liquid crystal molecules in the liquid crystal layer of the corresponding area of the dark pixel unit to maintain the initial state, and to control the liquid crystal molecules in the liquid crystal layer of the corresponding area of the bright pixel unit to be perpendicular to the opposing substrate and the array substrate. In the color transmissive display mode, the backlight module is turned on and a second gamma driving signal is applied to the display panel to control the liquid crystal molecules in the liquid crystal layer of the corresponding area of the dark pixel unit to be perpendicular to the opposing substrate and the array substrate, and to control the liquid crystal molecules in the liquid crystal layer of the corresponding area of the bright pixel unit to maintain the initial state.
[0015] This application also provides a driving method for a transflective display device, used to drive the transflective display device as described above, the driving method comprising: In the black and white reflective display mode, the backlight module is turned off and a first gamma driving signal is applied to the display panel to control the liquid crystal molecules and dye molecules in the liquid crystal layer of the corresponding area of the dark pixel unit to maintain the initial state, and to control the liquid crystal molecules and dye molecules in the liquid crystal layer of the corresponding area of the bright pixel unit to be perpendicular to the opposing substrate and the array substrate. In the color transmissive display mode, the backlight module is turned on and a first gamma driving signal is applied to the display panel to control the liquid crystal molecules and dye molecules in the liquid crystal layer of the corresponding area of the dark pixel unit to maintain the initial state, and to control the liquid crystal molecules and dye molecules in the liquid crystal layer of the corresponding area of the bright pixel unit to be perpendicular to the opposing substrate and the array substrate.
[0016] The beneficial effects of this invention are as follows: by setting a metal wire grid polarizer on the array substrate and setting a color resist layer on the side of the metal wire grid polarizer facing the backlight module, not only can the transmissive and reflective display device achieve both transmissive and reflective display using a single-layer liquid crystal cell, thereby reducing the thickness of the display device, but it can also achieve both transmissive display of color images and reflective display of black and white images, thus satisfying conventional color display mode and electronic paper display mode. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 1 of the present invention.
[0018] Figure 2 This is a cross-sectional schematic diagram of the array substrate at the thin-film transistor in Embodiment 1 of the present invention.
[0019] Figure 3 This is a schematic diagram of the principle of the metal wire grid polarizer in Embodiment 1 of the present invention.
[0020] Figure 4 This is a schematic diagram of the planar structure of the pixel driving circuit on the array substrate in Embodiment 1 of the present invention.
[0021] Figure 5 This is a schematic diagram of the planar structure of the color resist layer arrangement on the array substrate in Embodiment 1 of the present invention.
[0022] Figure 6 This is a schematic diagram of the transflective display device in black and white reflective display mode according to Embodiment 1 of the present invention.
[0023] Figure 7 This is a schematic diagram of the transflective display device in color transmissive display mode according to Embodiment 1 of the present invention.
[0024] Figure 8 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 2 of the present invention.
[0025] Figure 9 This is a cross-sectional schematic diagram of the array substrate at the thin-film transistor in Embodiment 2 of the present invention.
[0026] Figure 10 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 3 of the present invention.
[0027] Figure 11 This is a cross-sectional schematic diagram of the array substrate at the thin-film transistor in Embodiment 3 of the present invention.
[0028] Figures 12a-12f This is a schematic diagram of the fabrication process of the array substrate in Embodiment 3 of the present invention.
[0029] Figure 13 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 4 of the present invention.
[0030] Figure 14 This is a schematic diagram of the transflective display device in black and white reflective display mode in Embodiment 4 of the present invention.
[0031] Figure 15 This is a schematic diagram of the transflective display device in color transmissive display mode according to Embodiment 4 of the present invention.
[0032] Figure 16 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 5 of the present invention.
[0033] Figure 17 This is a schematic diagram of the transflective display device in its initial state according to Embodiment Six of the present invention.
[0034] Figure 18This is a schematic diagram of the refractive medium layer in Embodiment Six of the present invention. Detailed Implementation
[0035] 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, structure, features, and effects of the transflective display device and driving method proposed according to the present invention: [Example 1] Figure 1 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 1 of the present invention. Figure 2 This is a cross-sectional schematic diagram of the array substrate at the thin-film transistor in Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of the principle of the metal wire grid polarizer in Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of the planar structure of the pixel driving circuit on the array substrate in Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the planar structure of the color resist layer arrangement on the array substrate in Embodiment 1 of the present invention.
[0036] like Figures 1 to 5 As shown, Embodiment 1 of the present invention provides a transmissive display device, including a backlight module 50 and a display panel stacked on the light-emitting side of the backlight module 50. The backlight module 50 is used to provide a display light source to the display panel in a color transmissive display mode. The backlight module 50 can be an edge-lit backlight module or a direct-lit backlight module.
[0037] The display panel includes a counter substrate 10, an array substrate 20 disposed opposite to the counter substrate 10, and a liquid crystal layer 30 located between the counter substrate 10 and the array substrate 20. The array substrate 20 is located on the side of the counter substrate 10 closer to the backlight module 50, that is, the counter substrate 10 is located on the side of the display panel closer to the external environment, and the array substrate 20 is located on the side of the display panel closer to the backlight module. In this embodiment, the liquid crystal molecules in the liquid crystal layer 30 are positive liquid crystal molecules (liquid crystal molecules with positive dielectric anisotropy), such as... Figure 1 As shown, in the initial state, the liquid crystal molecules in the liquid crystal layer 30 are positive liquid crystal molecules and are in a flat position. The alignment direction of the liquid crystal layer 30 is parallel to the opposing substrate 10 and the array substrate 20. The alignment direction of the liquid crystal layer 30 on the side closer to the opposing substrate 10 is perpendicular to the alignment direction on the side closer to the array substrate 20. That is, the liquid crystal molecules in the liquid crystal layer 30 are twisted 90° from the opposing substrate 10 toward the array substrate 20 to form a TN display mode.
[0038] like Figure 2 and Figure 4As shown, the array substrate 20 has multiple pixel units P formed by multiple scan lines 1 and multiple data lines 2 that are mutually insulated and intersecting on the side facing the liquid crystal layer 30. Each pixel unit P has a pixel electrode 22 and a thin-film transistor 3. The pixel electrode 22 is electrically connected to the scan line 1 and data line 2 adjacent to the thin-film transistor 3 through the thin-film transistor 3. The thin-film transistor 3 includes a gate 31, an active layer 32, a source 33, and a drain 34. The gate 31 is located on the same layer as the scan line 1 and is electrically connected. The gate 31 is isolated from the active layer 32 by an insulating layer. The source 33 is electrically connected to the data line 2. The drain 34 is electrically connected to the pixel electrode 22 through a contact hole. The opposing substrate 10 has a first common electrode 11 on the side facing the liquid crystal layer 30 that cooperates with the pixel electrode 22. The pixel electrode 22 is a block structure corresponding to the pixel unit P, and the first common electrode 11 is a planar structure that covers the entire surface of the opposing substrate 10.
[0039] A metal wire grid polarizer 23, formed by multiple parallel and spaced metal wire grids 231, is placed on the array substrate 20. The display panel has pixel units P corresponding to pixel electrodes 22 one-to-one. The projection of the metal wire grid polarizer 23 onto the array substrate 20 covers all pixel units P. An upper polarizer 41 is provided on the opposing substrate 10. The light transmission axis of the metal wire grid polarizer 23 is perpendicular to the light transmission axis of the upper polarizer 41, and the reflection axis of the metal wire grid polarizer 23 is parallel to the light transmission axis of the upper polarizer 41. The alignment direction of the liquid crystal layer 30 near the opposing substrate 10 is parallel to the light transmission axis of the upper polarizer 41, and the alignment direction of the liquid crystal layer 30 near the array substrate 20 is parallel to the light transmission axis of the metal wire grid polarizer 23. The metal wire grid polarizer 23 and the pixel electrodes 22 are located on different layers and separated from each other by an insulating layer. Optionally, the metal wire grid polarizer 23 is located on the side of the pixel electrodes 22 away from the liquid crystal layer 30. By using a TN display panel with a metal wire grid polarizer 23, the light transmission axis of the metal wire grid polarizer 23 is perpendicular to the light transmission axis of the upper polarizer 41, so that both transmission and reflection displays can be achieved using a single-layer liquid crystal cell. Moreover, the metal wire grid polarizer can replace the lower polarizer, so there is no need to set a lower polarizer, which greatly reduces the thickness of the display device.
[0040] Figure 3 This is a schematic diagram illustrating the principle of the metal wire grid polarizer in Embodiment 1 of the present invention. Figure 3As shown, the metal wire grid polarizer 23 has a special polarization characteristic: it transmits polarized light perpendicular to the extension direction of the metal wire grid 231 and reflects polarized light parallel to the extension direction of the metal wire grid 231. In the incident light ray A, the polarization direction of the light ray has a first polarized light a1 perpendicular to the extension direction of the metal wire grid 231 and a second polarized light a2 parallel to the extension direction of the metal wire grid 231. The first polarized light a1 perpendicular to the extension direction of the metal wire grid 231 can be transmitted through the metal wire grid polarizer 23 to form the transmitted light ray C, while the second polarized light a2 parallel to the extension direction of the metal wire grid 231 is reflected to form the reflected light ray B. The metal wire grid polarizer 23 is made of a metal material, such as Al (aluminum) or Mo (molybdenum). The linewidth of the metal wire grid 231 is w, the spacing is p, and the height is t. Preferably, w is 82 nm, p is 60 nm, and t is 180 nm. The fabrication process can use nanoimprint technology. For a more detailed description of the metal wire grid polarizer 23, please refer to the prior art; it will not be elaborated here.
[0041] Furthermore, such as Figure 1 and Figure 5 As shown, the transflective display device also includes a color resist layer 25, which is located on the side of the metal wire grid polarizer 23 facing the backlight module 50. Each pixel unit P corresponds to a color resist layer 25. In this embodiment, the color resist layer 25 is disposed on the side of the array substrate 20 away from the liquid crystal layer 30 and is in direct contact with the surface of the array substrate 20; that is, the array substrate 20 also acts as a color filter substrate. The transflective display device also includes a black matrix 24 disposed on the same layer as the color resist layer 25. The black matrix 24 is used to space the multiple color resist layers 25 apart; that is, the black matrix 24 is also disposed on the side of the array substrate 20 away from the liquid crystal layer 30 and is in direct contact with the surface of the array substrate 20. By disposing the color resist layer 25 and the black matrix 24 on the surface of the array substrate 20 away from the liquid crystal layer 30, the fabrication of the color resist layer 25 and the black matrix 24 is facilitated. The color resist layer 25 includes red (R), green (G), and blue (B) color resist materials, which are correspondingly formed into red (R), green (G), and blue (B) pixel units P, thereby enabling the transflective display device to achieve color transmission display. The opposing substrate 10 does not require color resist materials; the areas corresponding to the pixel units P are transparent, thus enabling the transflective display device to achieve black and white reflection display. In black and white reflection display mode, the backlight module 50 is turned off, and the metal wire grid polarizer 23 reflects ambient light and is used to provide a display light source for the display panel; in color transmission display mode, the backlight module 50 is turned on and is used to provide a display light source for the display panel.
[0042] In this embodiment, a second common electrode 21 is also provided on the array substrate 20. The second common electrode 21 and the pixel electrode 22 are located on different layers and are insulated from each other. The second common electrode 21 is located on the side of the pixel electrode 22 away from the liquid crystal layer 30 and is used to form a storage capacitor with the pixel electrode 22. A metal wire grid polarizer 23 is located on the surface of the second common electrode 21 facing the liquid crystal layer 30, so that the metal wire grid polarizer 23 contacts the second common electrode 21 to reduce the resistance of the second common electrode 21.
[0043] The opposing substrate 10 and the array substrate 20 can be made of materials such as glass, acrylic, and polycarbonate. Alternatively, they can be flexible substrates. Suitable materials for flexible substrates include, for example, polyethersulfone (PES), polyethylene naphthalate (PEN), polyethylene (PE), polyimide (PI), polyvinyl chloride (PVC), polyethylene terephthalate (PET), or combinations thereof. The first common electrode 11, the second common electrode 21, and the pixel electrode 22 can be made of transparent conductive materials, such as indium tin oxide (ITO), indium zinc oxide (IZO), cadmium tin oxide (CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), cadmium oxide (CdO), hafnium oxide (HfO), indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium magnesium oxide (InGaMgO), or indium gallium aluminum oxide (InGaAlO).
[0044] This application also provides a driving method for a transflective display device, used to drive the transflective display device as described above. The driving method includes: Figure 6 This is a schematic diagram of the transflective display device in black-and-white reflective display mode according to Embodiment 1 of the present invention. Figure 6As shown, in the black and white reflective display mode, the backlight module is turned off and a first gamma drive signal is applied to the display panel. The first gamma drive signal can be output to the display panel by the microcontroller unit (MCU). The first gamma drive signal can be pre-registered in a register and the timing is controlled by the timing controller (TCON). This controls the liquid crystal molecules in the liquid crystal layer 30 corresponding to the dark state pixel unit P to maintain the initial state, and controls the liquid crystal molecules in the liquid crystal layer 30 corresponding to the bright state pixel unit P to be perpendicular to the opposing substrate 10 and the array substrate 20. For the bright state pixel unit P, the ambient light passes through the upper polarizer 41 and forms first-direction linearly polarized light (e.g., 0° linearly polarized light) parallel to the transmission axis of the upper polarizer 41. After passing through the liquid crystal layer 30, it is reflected back by the metal wire grid polarizer 23, passes through the liquid crystal layer 30 again, and is emitted from the upper polarizer 41. Since the light does not pass through the color resist layer 25, it appears as a white bright state. For the dark-state pixel unit P, ambient light passes through the upper polarizer 41 and forms linearly polarized light in a first direction (e.g., 0° linearly polarized light) parallel to the transmission axis of the upper polarizer 41. When passing through the liquid crystal layer 30, the light is deflected by 90° and forms linearly polarized light in a second direction (e.g., 90° linearly polarized light). After passing through the metal wire grid polarizer 23, the light is directed towards the backlight module 50, thus presenting a dark state. Therefore, the transflective display device can display a black and white image in reflective display mode.
[0045] Figure 7 This is a schematic diagram of the transmissive display device in color transmissive display mode according to Embodiment 1 of the present invention. Figure 7As shown, in the color transmissive display mode, the backlight module is turned on and a second gamma drive signal is applied to the display panel. The microcontroller unit (MCU) can output the second gamma drive signal to the display panel. The second gamma drive signal can be pre-registered in a register and the timing is controlled by the timing controller (TCON). This controls the liquid crystal molecules in the liquid crystal layer 30 of the region corresponding to the dark-state pixel unit P to be perpendicular to the opposing substrate 10 and the array substrate 20, and controls the liquid crystal molecules in the liquid crystal layer 30 of the region corresponding to the bright-state pixel unit P to maintain their initial state. For the dark-state pixel unit P, the light from the backlight passes through the metal wire grid polarizer 23 and forms second-direction linearly polarized light (e.g., 90° linearly polarized light) parallel to the transmission axis of the metal wire grid polarizer 23. Another part of the first-direction linearly polarized light (e.g., 0° linearly polarized light) is reflected back by the metal wire grid polarizer 23 for reuse. The second-direction linearly polarized light passes through the liquid crystal layer 30 and is absorbed by the upper polarizer 41, thus presenting a dark state. For a bright pixel unit P, the light from the backlight passes through the metal wire grid polarizer 23 and forms second-direction linearly polarized light (e.g., 90° linearly polarized light) parallel to the transmission axis of the metal wire grid polarizer 23. Another portion of the first-direction linearly polarized light (e.g., 0° linearly polarized light) is reflected back by the metal wire grid polarizer 23 for reuse. The second-direction linearly polarized light, upon passing through the liquid crystal layer 30, rotates 90° and forms first-direction linearly polarized light (e.g., 0° linearly polarized light), then passes through the upper polarizer 41 and exits. Because the light emitted from the backlight module 50 is filtered by the color resist layer 25, it exhibits a colored bright state. Therefore, the transflective display device can display a colored image in transmissive display mode.
[0046] [Example 2] Figure 8 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 2 of the present invention. Figure 9 This is a cross-sectional schematic diagram of the array substrate at the thin-film transistor in Embodiment 2 of the present invention. Figure 8 and Figure 9 As shown, the transflective display device and driving method provided in Embodiment 2 of the present invention are the same as those in Embodiment 1. Figures 1 to 7 The transflective display device and driving method in the above are basically the same, the difference being: In this embodiment, the color resist layer 25 is located on the side of the array substrate 20 facing the liquid crystal layer 30, and the color resist layer 25 is reused as a planarization layer on the array substrate 20. Optionally, the black matrix 24 is also located on the side of the array substrate 20 facing the liquid crystal layer 30. The black matrix 24 and the color resist layer 25 are used together as a planarization layer on the array substrate 20. Therefore, the array substrate 20 does not need to have a separate planarization layer, which can not only reduce the thickness of the array substrate 20, but also reduce the difficulty and cost of the array substrate 20 manufacturing process.
[0047] Specifically, the black matrix 24 and the color resist layer 25 cover the active layer 32, the source electrode 33 and the drain electrode 34 on the side facing the liquid crystal layer 30, the second common electrode 21 is disposed on the surface of the color resist layer 25 facing the liquid crystal layer 30, and the metal wire grid polarizer 23 is located on the surface of the second common electrode 21 facing the liquid crystal layer 30.
[0048] 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.
[0049] [Example 3] Figure 10 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 3 of the present invention. Figure 11 This is a cross-sectional schematic diagram of the array substrate at the thin-film transistor in Embodiment 3 of the present invention. Figure 10 and Figure 11 As shown, the transflective display device and driving method provided in Embodiment 3 of the present invention are the same as those in Embodiment 1. Figures 1 to 7 Example 2 Figure 8 and Figure 9 The transflective display device and driving method in the above are basically the same, the difference being: In this embodiment, the metal wire grid polarizer 23 is located on the surface of the pixel electrode 22 facing the liquid crystal layer 30, thereby making the metal wire grid polarizer 23 contact the pixel electrode 22 to reduce the resistance of the pixel electrode 22. Since the pixel electrodes 22 in adjacent pixel units P need to be independently controlled, i.e., mutually insulated, the metal wire grid polarizer 23 needs to be disconnected between adjacent pixel units P to avoid short circuits between the pixel electrodes 22 in adjacent pixel units P.
[0050] Figures 12a-12f This is a schematic diagram of the fabrication process of the array substrate in Embodiment 3 of the present invention. Figures 12a-12f As shown, the specific method for fabricating the array substrate in this embodiment is as follows: like Figure 12a As shown, a substrate is provided, which may be made of materials such as glass, quartz, silicon, acrylic, or polycarbonate. The substrate may also be a flexible substrate. Suitable materials for flexible substrates include, for example, polyethersulfone (PES), polyethylene naphthalate (PEN), polyethylene (PE), polyimide (PI), polyvinyl chloride (PVC), polyethylene terephthalate (PET), or combinations thereof.
[0051] Patterned scan lines 1 and gate 31 are formed on a substrate. Specifically, a metal layer is deposited on the substrate, and the metal layer is patterned using an etching process to form gate 31 and scan lines 1. Gate 31 and scan lines 1 can be made of metals such as copper (Cu), silver (Ag), chromium (Cr), molybdenum (Mo), aluminum (Al), titanium (Ti), manganese (Mn), nickel (Ni), etc., or combinations of the above metals such as Al / Mo, Cu / Mo, etc.
[0052] A first insulating layer 201 covering the scan line 1 and the gate 31 is formed on the substrate. Specifically, a first insulating layer 201 covering the gate 31 and the scan line 1 is deposited on the substrate. The first insulating layer 201 is a gate insulating layer, and the material of the first insulating layer 201 is silicon oxide (SiOx), silicon nitride (SiNx), or a combination of the two.
[0053] An island-shaped active layer 32 is formed on the first insulating layer 201. Specifically, an amorphous silicon layer and a doped amorphous silicon layer are covered on the first insulating layer 201, and the amorphous silicon layer and the doped amorphous silicon layer are etched to form a patterned active layer 32. Of course, the active layer 32 can also be made of a metal oxide (e.g., indium zinc oxide (InZnO), indium gallium oxide (InGaO), indium tin oxide (InSnO), zinc tin oxide (ZnSnO), gallium tin oxide (GaSnO), gallium zinc oxide (GaZnO), indium gallium zinc oxide (IGZO), or indium gallium zinc tin oxide (IGZTO), etc.).
[0054] Patterned data lines 2, source 33, and drain 34 are formed on the first insulating layer 201. Source 33 and drain 34 are spaced apart and both are in conductive contact with the active layer 32. The gate 31, active layer 32, source 33, and drain 34 together form a thin-film transistor 3. Specifically, a metal layer is deposited on the first insulating layer 201 and covers the active layer 32. The metal layer is etched to form source 33, drain 34, and data lines 2. Source 33 is conductively connected to data lines 2. Both source 33 and drain 34 are in conductive contact with the active layer 32. Source 33 and drain 34 are spaced apart at the active layer 32 to form a channel. Data lines 2, source 33, and drain 34 can be made of metals such as copper (Cu), silver (Ag), chromium (Cr), molybdenum (Mo), aluminum (Al), titanium (Ti), manganese (Mn), nickel (Ni), or combinations of these metals such as Al / Mo or Cu / Mo.
[0055] A second insulating layer 202 is formed on the first insulating layer 201 and covers the data line 2, the source electrode 33, and the drain electrode 34. The material of the second insulating layer 202 is silicon oxide (SiOx), silicon nitride (SiNx), or a combination of both. Of course, in other embodiments, the second insulating layer 202 may not be provided, and the black matrix 24 and the color resist layer 25 may be directly fabricated.
[0056] like Figure 12b As shown, a black matrix 24 and a color resist layer 25 are formed on the substrate, covering the data line 2, source 33, and drain 34. Specifically, the color resist layer 25 includes red (R), green (G), and blue (B) color resist materials, and correspondingly forms red (R), green (G), and blue (B) pixel units P, thereby enabling the transflective display device to achieve color transmission display. The red (R), green (G), and blue (B) color resist materials are each fabricated using a set of processes, and the black matrix 24 is used to separate the multiple color resist layers 25 from each other. At this time, the black matrix 24 and the color resist layer 25 can planarize the array substrate 20, thus eliminating the need to fabricate an additional planarization layer.
[0057] like Figure 12c As shown, a second common electrode 21 is formed on the black matrix 24 and the color resist layer 25 and is in direct contact with the surfaces of the black matrix 24 and the color resist layer 25. The second common electrode 21 can be made of a transparent conductive material, such as indium tin oxide (ITO), indium zinc oxide (IZO), cadmium tin oxide (CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), cadmium oxide (CdO), hafnium oxide (HfO), indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium magnesium oxide (InGaMgO), or indium gallium aluminum oxide (InGaAlO), etc.
[0058] like Figure 12d As shown, an insulating spacer layer 203 covering the second common electrode 21 is formed on the substrate. The insulating spacer layer 203 and the black matrix 24 are etched to form a contact hole 204, through which the drain electrode 34 is exposed. The insulating spacer layer 203 is made of silicon oxide (SiOx), silicon nitride (SiNx), or a combination of both.
[0059] like Figure 12eAs shown, a pixel electrode 22 is formed on the insulating spacer layer 203, and the pixel electrode 22 is electrically connected to the drain electrode 34 through the contact hole 204. The second common electrode 21 and the pixel electrode 22 are made of transparent electrodes such as indium tin oxide (ITO) or indium zinc oxide (IZO). The pixel electrode 22 can be made of transparent conductive materials, such as indium tin oxide (ITO), indium zinc oxide (IZO), cadmium tin oxide (CTO), aluminum zinc oxide (AZO), indium tin zinc oxide (ITZO), zinc oxide (ZnO), cadmium oxide (CdO), hafnium oxide (HfO), indium gallium zinc oxide (InGaZnO), indium gallium zinc magnesium oxide (InGaZnMgO), indium gallium magnesium oxide (InGaMgO), or indium gallium aluminum oxide (InGaAlO).
[0060] like Figure 12f As shown, a metal wire grid polarizer 23 is fabricated on the surface of the pixel electrode 22. The metal wire grid polarizer 23 is in contact with the pixel electrode 22 to reduce the resistance of the pixel electrode 22. The metal wire grid polarizer 23 needs to be disconnected between adjacent pixel units P to avoid short circuits between pixel electrodes 22 within adjacent pixel units P. The metal wire grid polarizer 23 is made of a metallic material, such as Al (aluminum) or Mo (molybdenum). The linewidth of the metal wire grid 231 is w, the spacing is p, and the height is t. Preferably, w is 82 nm, p is 60 nm, and t is 180 nm. Specifically, the metal wire grid polarizer 23 can be manufactured using nanoimprint technology. For example, first, a layer of PMMA (polymethyl methacrylate, a highly transparent and weather-resistant thermoplastic, also known as acrylic or plexiglass) is coated onto the PMMA; then, the PMMA is imprinted using a mold. Alternatively, an etching process can be used to etch the PMMA. Next, a layer of aluminum or molybdenum is coated onto the formed PMMA using metal magnetron sputtering technology. Finally, an acetone solution is injected, and a lift-off process is used to peel off the PMMA and the metal layer above it, forming the metal wire grid 231. In this process, the PMMA dissolves in acetone (PMMA has a very low swelling rate in acetone), and the metal layer above the PMMA collapses to remove excess metal.
[0061] 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.
[0062] [Example 4] Figure 13 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 4 of the present invention. Figure 13 As shown, the transflective display device and driving method provided in Embodiment 4 of the present invention are the same as those in Embodiment 1. Figures 1 to 7 Example 2 Figure 8 and Figure 9 Example 3 Figures 10 to 12f The transflective display device and driving method in the above are basically the same, the difference being: In this embodiment, the liquid crystal layer 30 includes liquid crystal molecules 301 and dye molecules 302 mixed together. The liquid crystal molecules 301 are positive liquid crystal molecules (liquid crystal molecules with positive dielectric anisotropy). In the initial state, the liquid crystal molecules 301 and dye molecules 302 in the liquid crystal layer 30 are in a flat position. The alignment direction of the liquid crystal layer 30 is parallel to the opposing substrate 10 and the array substrate 20. The alignment direction of the liquid crystal layer 30 on the side closer to the opposing substrate 10 is perpendicular to the alignment direction on the side closer to the array substrate 20. That is, the liquid crystal molecules in the liquid crystal layer 30 are twisted 90° from the opposing substrate 10 toward the array substrate 20 to form a TN display mode. Among them, the long axis of the dye molecules 302 has a good light absorption effect and can absorb light parallel to the long axis of the dye molecules 302. Therefore, there is no need to install an upper polarizer 41 on the transflective display device, which reduces the thickness and manufacturing cost of the transflective display device and can also improve the utilization rate of light. Moreover, the reflection mode and the transmission mode can use the same driving method, that is, use the same set of gamma driving signals, which reduces the driving difficulty and avoids the problem of screen flickering when switching between reflection mode and transmission mode.
[0063] This application also provides a driving method for a transflective display device, used to drive the transflective display device as described above. The driving method includes: Figure 14 This is a schematic diagram of the transflective display device in black-and-white reflective display mode according to Embodiment 4 of the present invention. Figure 14 As shown, in the black-and-white reflective display mode, the backlight module is turned off and a first gamma drive signal is applied to the display panel. The first gamma drive signal can be output to the display panel by the microcontroller unit (MCU). The first gamma drive signal can be pre-registered in a register and the timing is controlled by the timing controller (TCON). This controls the liquid crystal molecules 301 and dye molecules 302 in the liquid crystal layer 30 corresponding to the dark state pixel unit P to maintain their initial state, and controls the liquid crystal molecules 301 and dye molecules 302 in the liquid crystal layer 30 corresponding to the bright state pixel unit P to be perpendicular to the opposing substrate 10 and the array substrate 20. For the bright state pixel unit P, after the ambient light passes through the liquid crystal layer 30, part of the ambient light is reflected back by the metal wire grid polarizer 23, passes through the liquid crystal layer 30 again, and is emitted from the upper polarizer 41. Since the light does not pass through the color resist layer 25, it appears as a white bright state. For the dark state pixel unit P, when the ambient light passes through the liquid crystal layer 30, it is absorbed by the dye molecules 302 in the liquid crystal layer 30, thus appearing as a dark state. Therefore, a transflective display device can display a black and white image in reflective display mode.
[0064] Figure 15 This is a schematic diagram of the transmissive display device in color transmissive display mode according to Embodiment 4 of the present invention. Figure 15 As shown, in the color transmissive display mode, the backlight module is turned on and a first gamma drive signal is applied to the display panel. The first gamma drive signal can be output to the display panel by the microcontroller unit (MCU). The first gamma drive signal can be pre-stored in a register and the timing is controlled by the timing controller (TCON). This controls the liquid crystal molecules 301 and dye molecules 302 in the liquid crystal layer 30 corresponding to the dark state pixel unit P to maintain their initial state, and controls the liquid crystal molecules 301 and dye molecules 302 in the liquid crystal layer 30 corresponding to the bright state pixel unit P to be perpendicular to the opposing substrate 10 and the array substrate 20. For the dark-state pixel unit P, the backlight light passes through the metal wire grid polarizer 23 and forms second-direction linearly polarized light (e.g., 90° linearly polarized light) parallel to the transmission axis of the metal wire grid polarizer 23. The remaining portion of the first-direction linearly polarized light (e.g., 0° linearly polarized light) is reflected back by the metal wire grid polarizer 23 for reuse. The second-direction linearly polarized light is absorbed by dye molecules 302 in the liquid crystal layer 30 when it passes through the liquid crystal layer 30, thus exhibiting a dark state. For the bright-state pixel unit P, the backlight light passes through the metal wire grid polarizer 23 and forms second-direction linearly polarized light (e.g., 90° linearly polarized light) parallel to the transmission axis of the metal wire grid polarizer 23. The remaining portion of the first-direction linearly polarized light (e.g., 0° linearly polarized light) is reflected back by the metal wire grid polarizer 23 for reuse. The second-direction linearly polarized light passes through the liquid crystal layer 30 and is emitted from the opposing substrate 10. Because the light emitted from the backlight module 50 is filtered by the color resist layer 25, it exhibits a colored bright state. Therefore, transflective display devices can display color images in transmissive display mode.
[0065] 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.
[0066] [Example 5] Figure 16 This is a schematic diagram of the transflective display device in its initial state according to Embodiment 5 of the present invention. Figure 16 As shown, the transflective display device and driving method provided in Embodiment 5 of the present invention are the same as those in Embodiment 1. Figures 1 to 7 Example 3 Figures 10 to 12f Example 4 Figures 13 to 15 The transflective display device and driving method in the above are basically the same, the difference being: In this embodiment, the transflective display device further includes a color filter substrate 60, which is located between the backlight module 50 and the array substrate 20. Color resist layers 25 are disposed on the color filter substrate 60. That is, in this embodiment, a separate color filter substrate 60 is provided to reduce the manufacturing difficulty of the transflective display device. A black matrix 24 is also disposed on the color filter substrate 60, and it spaces the multiple color resist layers 25 apart from each other.
[0067] Furthermore, a reflective polarizer 42 is provided on the side of the array substrate 20 away from the liquid crystal layer 30. The reflective polarizer 42 has mutually perpendicular transmission axes and reflection axes. The transmission axis of the reflective polarizer 42 is parallel to the transmission axis of the metal wire grid polarizer 23, and the reflection axis of the reflective polarizer 42 is parallel to the reflection axis of the metal wire grid polarizer 23. Since the metal wire grid polarizer 23 cannot achieve 100% reflection of linearly polarized light parallel to its reflection axis, i.e., its light utilization rate is limited, the reflective polarizer 42 can compensate for the limited reflection effect of the metal wire grid polarizer 23, thereby further improving the utilization rate of ambient light and backlight.
[0068] 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 3, and Embodiment 4, and will not be repeated here.
[0069] [Example 6] Figure 17 This is a schematic diagram of the transflective display device in its initial state according to Embodiment Six of the present invention. Figure 18 This is a schematic diagram of the refractive medium layer in Embodiment Six of the present invention. Figure 17 and Figure 18 As shown, the transflective display device and driving method provided in Embodiment Six of the present invention are the same as those in Embodiment One (…). Figures 1 to 7 Example 3 Figures 10 to 12f Example 4 Figures 13 to 15 The transflective display device and driving method in the above are basically the same, the difference being: In this embodiment, the transflective display device further includes a color filter substrate 60, which is located between the backlight module 50 and the array substrate 20. Color resist layers 25 are disposed on the color filter substrate 60. That is, in this embodiment, a separate color filter substrate 60 is provided to reduce the manufacturing difficulty of the transflective display device. A black matrix 24 is also disposed on the color filter substrate 60, and it spaces the multiple color resist layers 25 apart from each other.
[0070] Furthermore, a refractive medium layer 26 is provided on the side of the array substrate 20 away from the liquid crystal layer 30. The refractive medium layer 26 can transmit light emitted by the backlight module 50 and perform total internal reflection on ambient light with an incident angle greater than a preset angle. The refractive medium layer 26 includes a first refractive layer 261 and a second refractive layer 262 stacked on top of each other. The first refractive layer 261 includes multiple protrusions and is located on the side of the second refractive layer 262 away from the array substrate 20. The refractive index of the second refractive layer 262 is greater than that of the first refractive layer 261. The cross-sectional shape of the protrusions can be semi-elliptical, triangular, or trapezoidal, etc., with a semi-elliptical shape providing better reflection. Snell's law states that n1*Sinθ1=n2*Sinθ2, and the critical angle for total emission θ0=arcsin(n2 / n1). When the incident angle θ≥θ0, light enters a less dense medium from a denser medium, resulting in total internal reflection. This embodiment improves the reflectivity of the transflective display device to large-angle light in reflective display mode by setting a refractive medium layer 26.
[0071] 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 3, and Embodiment 4, and will not be repeated here.
[0072] 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.
[0073] 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 transflective display device, characterized in that, Includes a backlight module (50) and a display panel stacked on the light-emitting side of the backlight module (50); The display panel includes an opposing substrate (10), an array substrate (20) disposed opposite to the opposing substrate (10), and a liquid crystal layer (30) located between the opposing substrate (10) and the array substrate (20). The array substrate (20) is located on the side of the opposing substrate (10) closer to the backlight module (50). The array substrate (20) is provided with pixel electrodes (22) and a metal wire grid polarizer (23) formed by multiple metal wire grids (231) arranged parallel to each other and spaced apart. The display panel has pixel units (P) corresponding one-to-one with the pixel electrodes (22). The projection of the metal wire grid polarizer (23) on the array substrate (20) covers all the pixel units (P). The opposing substrate (10) is provided with a first common electrode (11) cooperating with the pixel electrodes (22) on the side facing the liquid crystal layer (30). The transflective display device further includes a color resist layer (25), which is located on the side of the metal wire grid polarizer (21) facing the backlight module (50), and the pixel unit (P) corresponds one-to-one with the color resist layer (25); In black and white reflective display mode, the backlight module (50) is turned off, and the metal wire grid polarizer (23) reflects ambient light and is used to provide a display light source for the display panel; in color transmissive display mode, the backlight module (50) is turned on and is used to provide a display light source for the display panel.
2. The transflective display device according to claim 1, characterized in that, The liquid crystal layer (30) uses positive liquid crystal molecules. The alignment direction of the liquid crystal layer (30) is parallel to the opposing substrate (10) and the array substrate (20). The alignment direction of the liquid crystal layer (30) on the side closer to the opposing substrate (10) is perpendicular to the alignment direction on the side closer to the array substrate (20). An upper polarizer (41) is provided on the opposing substrate (10). The light transmission axis of the metal wire grid polarizer (23) is perpendicular to the light transmission axis of the upper polarizer (41), and the reflection axis of the metal wire grid polarizer (23) is parallel to the light transmission axis of the upper polarizer (41).
3. The transflective display device according to claim 1, characterized in that, The liquid crystal layer (30) includes liquid crystal molecules (301) and dye molecules (302) mixed together. The liquid crystal molecules (301) are positive liquid crystal molecules. The alignment direction of the liquid crystal layer (30) is parallel to the opposing substrate (10) and the array substrate (20). The alignment direction of the liquid crystal layer (30) on the side closer to the opposing substrate (10) is perpendicular to the alignment direction on the side closer to the array substrate (20).
4. The transflective display device according to claim 1, characterized in that, The color resist layer (25) is located on the side of the array substrate (20) facing the liquid crystal layer (30), and the color resist layer (25) is reused as a planarization layer on the array substrate (20); Alternatively, the color resist layer (25) may be disposed on the side of the array substrate (20) away from the liquid crystal layer (30).
5. The transflective display device according to claim 1, characterized in that, The transflective display device further includes a color filter substrate (60), which is located between the backlight module (50) and the array substrate (20), and the color resist layer (25) is disposed on the color filter substrate (60).
6. The transflective display device according to any one of claims 1-5, characterized in that, A reflective polarizer (42) is provided on the side of the array substrate (20) away from the liquid crystal layer (30). The light transmission axis of the reflective polarizer (42) is parallel to the light transmission axis of the metal wire grid polarizer (23), and the reflection axis of the reflective polarizer (42) is parallel to the reflection axis of the metal wire grid polarizer (23). Alternatively, a refractive medium layer (26) may be provided on the side of the array substrate (20) away from the liquid crystal layer (30). The refractive medium layer (26) is capable of transmitting light emitted by the backlight module (50) and performing total internal reflection on ambient light with an incident angle greater than a preset angle. The refractive medium layer (26) includes a first refractive layer (261) and a second refractive layer (262) stacked on each other. The first refractive layer (261) includes multiple protrusion structures. The first refractive layer (261) is located on the side of the second refractive layer (262) away from the array substrate (20). The refractive index of the second refractive layer (262) is greater than the refractive index of the first refractive layer (261).
7. The transflective display device according to any one of claims 1-5, characterized in that, The metal wire grid polarizer (23) is located on the surface of the pixel electrode (22) facing the liquid crystal layer (30) and is disconnected between adjacent pixel units (P); Alternatively, a second common electrode (21) is provided on the array substrate (20), the second common electrode (21) is located on the side of the pixel electrode (22) away from the liquid crystal layer (30) and is used to form a storage capacitor between the pixel electrode (22) and the pixel electrode (22), and the metal wire grid polarizer (23) is located on the surface of the second common electrode (21) facing the liquid crystal layer (30).
8. The transflective display device according to any one of claims 1-5, characterized in that, The transflective display device further includes a black matrix (24) disposed on the same layer as the color resist layer (25), the black matrix (24) being used to space the multiple color resist layers (25) apart from each other.
9. A driving method for a transflective display device, characterized in that, The driving method for driving the transflective display device as described in claim 2 includes: In the black and white reflective display mode, the backlight module is turned off and a first gamma driving signal is applied to the display panel to control the liquid crystal molecules in the liquid crystal layer (30) of the dark pixel unit (P) to maintain the initial state, and to control the liquid crystal molecules in the liquid crystal layer (30) of the bright pixel unit (P) to be perpendicular to the opposing substrate (10) and the array substrate (20). In the color transmissive display mode, the backlight module is turned on and a second gamma driving signal is applied to the display panel to control the liquid crystal molecules in the liquid crystal layer (30) of the dark pixel unit (P) to be perpendicular to the opposing substrate (10) and the array substrate (20), and to control the liquid crystal molecules in the liquid crystal layer (30) of the bright pixel unit (P) to remain in the initial state.
10. A driving method for a transflective display device, characterized in that, The driving method for driving the transflective display device as described in claim 3 includes: In the black and white reflective display mode, the backlight module is turned off and a first gamma driving signal is applied to the display panel to control the liquid crystal molecules (301) and dye molecules (302) in the liquid crystal layer (30) of the corresponding area of the dark pixel unit (P) to maintain the initial state, and to control the liquid crystal molecules (301) and dye molecules (302) in the liquid crystal layer (30) of the corresponding area of the bright pixel unit (P) to be perpendicular to the opposing substrate (10) and the array substrate (20); In the color transmissive display mode, the backlight module is turned on and a first gamma driving signal is applied to the display panel to control the liquid crystal molecules (301) and dye molecules (302) in the liquid crystal layer (30) of the corresponding area of the dark pixel unit (P) to maintain the initial state, and to control the liquid crystal molecules (301) and dye molecules (302) in the liquid crystal layer (30) of the corresponding area of the bright pixel unit (P) to be perpendicular to the opposing substrate (10) and the array substrate (20).