Reflective display device and driving method

Abstract

The application discloses a reflective display device and a driving method. The reflective display device comprises an opposite substrate, an array substrate and a liquid crystal layer. The liquid crystal layer comprises first color cholesteric liquid crystal molecules. The array substrate is provided with a pixel electrode. The opposite substrate is provided with a common electrode matched with the pixel electrode. The reflective display device has a plurality of pixel units arranged in an array. Each pixel unit is provided with a pixel electrode. The pixel unit comprises a first sub-pixel area and a second sub-pixel area with different areas. The pixel electrode comprises a first sub-pixel electrode and a second sub-pixel electrode which are independently controlled. The first sub-pixel electrode corresponds to the first sub-pixel area. The second sub-pixel electrode corresponds to the second sub-pixel area. The bright and dark states of the first sub-pixel area and the second sub-pixel area in each pixel unit are independently controlled. The pixel unit can present more gray scale displays. The gray scale number of the cholesteric liquid crystal reflective display device is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display technology, in particular to a reflective display device and a driving method. BACKGROUND

[0002] The display panel has the advantages of thinness, durability, low power consumption, and compliance with energy conservation and environmental protection, but needs to be used with a backlight source, resulting in a thick module and high cost. Electronic paper displays (reflective displays) have become a type of display that meets the needs of the public. Electronic paper displays can use external light sources to display images, unlike liquid crystal displays, which require a backlight source. Therefore, in an outdoor environment with strong sunlight, information on electronic paper can still be clearly seen without the problem of viewing angle. Electronic paper displays have been widely used in electronic readers (such as electronic books and electronic newspapers) or other electronic components (such as price tags) due to their advantages of power saving, high reflectivity, and contrast ratio.

[0003] Existing electronic paper displays usually adopt E-Ink microcapsule technology (microcapsule electronic ink technology), SiPix microcup technology (microcup type electrophoretic display technology), Bridgestone electronic liquid powder technology, cholesteric liquid crystal display (CLCD) technology, micro-electro-mechanical system (MEMS) technology, or electrowetting technology. However, existing electronic paper display technology is not very mature compared to liquid crystal display technology, has low mass production efficiency, and has relatively high manufacturing costs. Moreover, existing electronic paper displays cannot achieve color display.

[0004] The reflective display device using cholesteric liquid crystals in the prior art can only reflect one color and transmit light of other colors due to the requirement of cholesteric liquid crystal pitch. Therefore, the reflective display device with a single layer of cholesteric liquid crystals is mostly used to display in the form of yellow background and black characters or black background and yellow characters, black background and red characters, or red background and black characters, and cannot achieve black background and white characters or white background and black characters like a book, which greatly limits the application of the product. Moreover, the color of the reflected light of the cholesteric liquid crystal is poor, affecting the display effect. Figure 1 is a structural schematic diagram of a reflective display device using a three-layer cholesteric liquid crystal cell in the prior art, as shown in Figure 1If white display or color display needs to be realized, the reflective display device needs to use a three-layer cholesteric liquid crystal cell to reflect red, green and blue light respectively, so as to realize white display and color display, but the three-layer cholesteric liquid crystal cell has a large cell thickness and a high cost. In addition, since the cholesteric liquid crystal can only switch among three states of P state (Planar, planar texture state, reflection state), FC state (Focal Conic, focal conic state, fog state) and H state (transparent state), the characteristics of the cholesteric liquid crystal are not in the general liquid crystal curve in the middle part, so that the reflective display device using the cholesteric liquid crystal can only have two gray scales of black state and bright state, and therefore gray scale display is a big challenge. SUMMARY

[0005] In order to overcome the defects and deficiencies in the prior art, the purpose of the present application is to provide a reflective display device and a driving method, so as to solve the problem of fewer gray scales of the reflective display device using cholesteric liquid crystal in the prior art.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] The present application provides a reflective display device, comprising an array substrate, an opposite substrate and a liquid crystal layer between the array substrate and the opposite substrate, wherein the liquid crystal layer comprises first color cholesteric liquid crystal molecules, the first color cholesteric liquid crystal molecules reflect first color light in a reflection state, the array substrate is provided with a pixel electrode, and the opposite substrate is provided with a common electrode matched with the pixel electrode.

[0008] The reflective display device has a plurality of pixel units arranged in an array, each of the pixel units is provided with the pixel electrode, the pixel unit comprises a first sub-pixel area and a second sub-pixel area with different areas, the pixel electrode comprises a first sub-pixel electrode and a second sub-pixel electrode which are independently controlled, the first sub-pixel electrode corresponds to the first sub-pixel area, and the second sub-pixel electrode corresponds to the second sub-pixel area.

[0009] Further, the array substrate is provided with a plurality of scan lines, a plurality of data lines, a plurality of first thin film transistors and a plurality of second thin film transistors, the plurality of scan lines comprises a first scan line and a second scan line, the first scan line is arranged on the upper side of each row of the pixel units, the second scan line is arranged on the lower side of each row of the pixel units, and the first scan line and the second scan line are arranged between any two rows of the pixel units.

[0010] In each of the pixel units, the first sub-pixel electrode is conductively connected with the corresponding first scan line and the data line through the first thin film transistor, and the second sub-pixel electrode is conductively connected with the corresponding second scan line and the data line through the second thin film transistor.

[0011] Further, the first sub-pixel electrode and the second sub-pixel electrode in each of the pixel units are connected with the same data line, or the first sub-pixel electrode and the second sub-pixel electrode in each of the pixel units are connected with two different data lines respectively.

[0012] Further, the array substrate is provided with a gate drive circuit, the gate drive circuit comprises a plurality of main scan lines, a first control line, a second control line, a plurality of third thin film transistors and a plurality of fourth thin film transistors, the first scan line is conductively connected with the first control line and the corresponding main scan line through the third thin film transistor, the second scan line is conductively connected with the second control line and the corresponding main scan line through the fourth thin film transistor, the third thin film transistor for controlling the first scan line and the fourth thin film transistor for controlling the second scan line on the upper and lower sides of the same row of pixel units are connected with the same main scan line.

[0013] Further, the array substrate is provided with a plurality of scan lines, a plurality of data lines, a plurality of first thin film transistors and a plurality of second thin film transistors, the plurality of data lines comprises a first data line and a second data line, the first data line is arranged on the left side of each column of pixel units, the second data line is arranged on the right side of each column of pixel units, and the first data line and the second data line are arranged between any two columns of pixel units.

[0014] In each of the pixel units, the first sub-pixel electrode is conductively connected with the corresponding scan line and the first data line through the first thin film transistor, and the second sub-pixel electrode is conductively connected with the corresponding scan line and the second data line through the second thin film transistor.

[0015] Further, the liquid crystal layer further comprises first color dye liquid crystal molecules mixed with the first color cholesteric liquid crystal molecules, and the first color dye liquid crystal molecules rotate synchronously with the first color cholesteric liquid crystal molecules.

[0016] The plurality of pixel units comprises a first pixel unit and a second pixel unit, the opposing substrate is in a transparent state in the region corresponding to the first pixel unit, the opposing substrate is provided with a color resist layer in the region corresponding to the second pixel unit, and the array substrate is provided with a reflective layer in the region corresponding to the second pixel unit.

[0017] When the first pixel unit is in a bright state, the first color cholesteric liquid crystal molecules in the region corresponding to the first pixel unit are all in a reflective state, and when the first pixel unit is in a dark state, the first color cholesteric liquid crystal molecules in the region corresponding to the first pixel unit are all in a transparent state or a haze state; when the second pixel unit is in a bright state, the first color cholesteric liquid crystal molecules in the region corresponding to the second pixel unit are all in a transparent state or a haze state, and when the second pixel unit is in a dark state, the first color cholesteric liquid crystal molecules in the region corresponding to the second pixel unit are all in a reflective state.

[0018] Further, the second pixel unit includes a second color pixel unit, and the color filter layer includes a second color filter layer corresponding to the second color pixel unit, wherein the first color and the second color are complementary colors.

[0019] Alternatively, the second pixel unit includes a second color pixel unit and a third color pixel unit, and the color filter layer includes a second color filter layer corresponding to the second color pixel unit and a third color filter layer corresponding to the third color pixel unit, and the first color, the second color and the third color are each one of red, green and blue.

[0020] Further, the plurality of pixel electrodes include a transparent pixel electrode and a reflective pixel electrode, the transparent pixel electrode corresponds to the first pixel unit, and the reflective pixel electrode corresponds to the second pixel unit, and the reflective pixel electrode is multiplexed as the reflective layer.

[0021] Alternatively, the array substrate is provided with a light-absorbing layer, the light-absorbing layer is used to absorb light passing through the liquid crystal layer, a projection of the light-absorbing layer on the array substrate overlaps with the first pixel unit, or the light-absorbing layer is a planar structure covering the array substrate.

[0022] Alternatively, the opposite substrate is provided with a black matrix, the black matrix corresponds to a non-display area of an edge of the reflective display device, or the black matrix is provided in the display area and the non-display area of the reflective display device, and the black matrix separates the plurality of pixel units from each other in the display area.

[0023] The application further provides a driving method of a reflective display device, used for driving the reflective display device as described above, and the driving method comprises the following steps.

[0024] When the pixel unit is in a dark state, the first sub-pixel area and the second sub-pixel area are both controlled to be in a dark state.

[0025] When the pixel unit is in a first gray scale brightness, the first sub-pixel area is controlled to be in a bright state, and the second sub-pixel area is controlled to be in a dark state.

[0026] when the pixel unit is in the second gray scale brightness, the first sub-pixel region is controlled to be in a dark state, and the second sub-pixel region is controlled to be in a bright state;

[0027] when the pixel unit is in the third gray scale brightness, the first sub-pixel region and the second sub-pixel region are both controlled to be in a bright state.

[0028] Further, the array substrate is provided with a plurality of scanning lines, a plurality of data lines, a plurality of first thin film transistors, and a plurality of second thin film transistors. The plurality of scanning lines include first scanning lines and second scanning lines. The first scanning lines are arranged on the upper side of each row of pixel units, and the second scanning lines are arranged on the lower side of each row of pixel units. The first scanning lines and the second scanning lines are arranged between any two rows of pixel units. In each pixel unit, the first sub-pixel electrode is conductively connected to the corresponding first scanning line and data line through the first thin film transistor, and the second sub-pixel electrode is conductively connected to the corresponding second scanning line and data line through the second thin film transistor. The array substrate is provided with a gate drive circuit. The gate drive circuit includes a plurality of main scanning lines, first control lines, second control lines, a plurality of third thin film transistors, and a plurality of fourth thin film transistors. The first scanning line is conductively connected to the first control line and the corresponding main scanning line through the third thin film transistor, and the second scanning line is conductively connected to the second control line and the corresponding main scanning line through the fourth thin film transistor. The third thin film transistor for controlling the first scanning line and the fourth thin film transistor for controlling the second scanning line on the upper and lower sides of the same row of pixel units are connected to the same main scanning line.

[0029] The driving method comprises:

[0030] The first control line and the second control line control the third thin film transistor and the fourth thin film transistor to be opened or closed alternately.

[0031] Alternatively, in the Nth frame, the first control line controls the third thin film transistor to be opened, and the second control line controls the fourth thin film transistor to be closed; in the N+1th frame, the first control line controls the third thin film transistor to be closed, and the second control line controls the fourth thin film transistor to be opened, N being an integer greater than or equal to 1.

[0032] The present application has the beneficial effect that the pixel unit comprises the first sub-pixel area and the second sub-pixel area with different areas, the first sub-pixel area and the second sub-pixel area are controlled by the first sub-pixel electrode and the second sub-pixel electrode respectively, and the bright and dark states of the first sub-pixel area and the second sub-pixel area are combined with each other, so that the pixel unit can present more gray scale display, thereby increasing the gray scale number of the reflective display device of the cholesterol liquid crystal. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure diagram of a reflective display device adopting a three-layer cholesterol liquid crystal cell in the prior art.

[0034] Figure 2 is a structure diagram of a reflective display device in an initial state in the embodiment one of the present application.

[0035] Figure 3 is a pixel arrangement structure diagram of a reflective display device in a dark state in the embodiment one of the present application.

[0036] Figure 4 is a plane structure diagram of an array substrate in the embodiment one of the present application.

[0037] Figure 5 is a principle diagram of three state transformations of a cholesterol liquid crystal in the embodiment one of the present application.

[0038] Figure 6 is a driving signal diagram of three state transformations of a cholesterol liquid crystal in the embodiment one of the present application.

[0039] Figure 7 is a pixel arrangement structure diagram of a reflective display device in a first gray scale brightness state in the embodiment one of the present application.

[0040] Figure 8 is a pixel arrangement structure diagram of a reflective display device in a second gray scale brightness state in the embodiment one of the present application.

[0041] Figure 9 is a pixel arrangement structure diagram of a reflective display device in a third gray scale brightness state in the embodiment one of the present application.

[0042] Figure 10 is a structure diagram of a reflective display device in displaying a pure blue picture in the embodiment one of the present application.

[0043] Figure 11 is a structure diagram of a reflective display device in displaying a pure red picture in the embodiment one of the present application.

[0044] Figure 12Fig. 2 is a structural schematic diagram of the reflective display device in the embodiment one of the present application when displaying a pure red picture.

[0045] Figure 13 Fig. 3 is a structural schematic diagram of the reflective display device in the embodiment one of the present application when displaying a pure green picture.

[0046] Figure 14 Fig. 4 is a structural schematic diagram of the reflective display device in the embodiment one of the present application when displaying a pure green picture.

[0047] Figure 15 Fig. 5 is a structural schematic diagram of the reflective display device in the embodiment one of the present application when displaying a white picture.

[0048] Figure 16 Fig. 6 is a structural schematic diagram of the reflective display device in the embodiment one of the present application when displaying a white picture.

[0049] Figure 17 Fig. 7 is a structural schematic diagram of the reflective display device in the embodiment one of the present application when displaying a pure black picture.

[0050] Figure 18 Fig. 8 is a planar structural schematic diagram of the array substrate in the embodiment two of the present application.

[0051] Figure 19 Fig. 9 is a planar structural schematic diagram of the array substrate in the embodiment two of the present application.

[0052] Figure 20 Fig. 10 is a planar structural schematic diagram of the gate driving circuit in the embodiment three of the present application.

[0053] Figure 21 Fig. 11 is a waveform schematic diagram of the first gate driving signal in the embodiment three of the present application.

[0054] Figure 22 Fig. 12 is a waveform schematic diagram of the second gate driving signal in the embodiment three of the present application.

[0055] Figure 23 Fig. 13 is a waveform schematic diagram of the second gate driving signal in the embodiment three of the present application.

[0056] Figure 24 Fig. 14 is a structural schematic diagram of the reflective display device in the embodiment four of the present application when in an initial state.

[0057] Figure 25 Fig. 15 is a structural schematic diagram of the reflective display device in the embodiment five of the present application when in an initial state.

[0058] Figure 26 Fig. 16 is a pixel arrangement structural schematic diagram of the reflective display device in the embodiment five of the present application.

[0059] Figure 27 This is a schematic diagram of the planar structure of the array substrate in Embodiment 5 of the present invention.

[0060] Figure 28 This is a schematic diagram of the reflective display device in its initial state according to Embodiment Six of the present invention. Detailed Implementation

[0061] 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 reflective display device and driving method proposed according to the present invention:

[0062] [Example 1]

[0063] Figure 2 This is a schematic diagram of the reflective display device in its initial state according to Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of the pixel arrangement structure of the reflective display device in Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of the planar structure of the array substrate in Embodiment 1 of the present invention.

[0064] like Figures 2 to 4 As shown, a reflective display device 10 provided in Embodiment 1 of the present invention includes a counter substrate 11, an array substrate 12 disposed opposite to the counter substrate 11, and a liquid crystal layer 13 located between the counter substrate 11 and the array substrate 12. The liquid crystal layer 13 includes first color cholesterol liquid crystal molecules 131, and the first color cholesterol liquid crystal molecules 131 reflect first color light in the reflective state.

[0065] The reflective display device 10 has a plurality of pixel units P arranged in an array, and each pixel unit P is provided with a pixel electrode 121 corresponding thereto, the pixel electrode 121 corresponds to the pixel unit P one by one, and the pixel electrode 121 is a block electrode. The opposed substrate 11 is provided with a common electrode 111 matched with the pixel electrode 121, and the common electrode 111 is a planar electrode covering the entire surface of the opposed substrate 11. The pixel unit P includes a first sub-pixel area Pa and a second sub-pixel area Pb with different areas, the pixel electrode 121 includes a first sub-pixel electrode 121a and a second sub-pixel electrode 121b which are independently controlled, the first sub-pixel electrode 121a corresponds to the first sub-pixel area Pa, and the second sub-pixel electrode 121b corresponds to the second sub-pixel area Pb, that is, the first sub-pixel electrode 121a is a block electrode corresponding to the first sub-pixel area Pa, and the second sub-pixel electrode 121b is a block electrode corresponding to the second sub-pixel area Pb. The bright and dark states of the first sub-pixel area Pa and the second sub-pixel area Pb are controlled by the first sub-pixel electrode 121a and the second sub-pixel electrode 121b respectively, and the bright and dark states of the first sub-pixel area Pa and the second sub-pixel area Pb are combined with each other, so that the pixel unit P can present more gray scale display, thereby increasing the number of gray scales of the reflective display device 10 of the cholesterol liquid crystal.

[0066] Among them, the cholesterol liquid crystal in the first color cholesterol liquid crystal molecule 131 has three stable textures of P state (Planar, planar texture state, reflection state), FC state (Focal Conic, focal conic state, fog state) and H state (transparent state). The reflection spectrum of the cholesterol liquid crystal in the P state is in the visible spectrum, and the cholesterol liquid crystal reflects bright colored light, and the specific reflected color can be set according to the pitch of the cholesterol liquid crystal; when in FC state, the cholesterol liquid crystal no longer reflects the above-mentioned colored light, and the light can be scattered and transmitted through the cholesterol liquid crystal; when in H state, the cholesterol liquid crystal no longer reflects the above-mentioned colored light, and the light can directly transmit through the cholesterol liquid crystal, and has no scattering effect on the light. Under the action of a certain electric field, the three states can be converted to each other.

[0067] Figure 5 is the principle diagram of the three state transformation of the cholesterol liquid crystal in the application, Figure 6 is the driving signal diagram of the three state transformation of the cholesterol liquid crystal in the application. As Figure 5 and Figure 6As shown, the common voltage signal Vcom is applied to the common electrode 111, and the first electric signal V1 is continuously applied to the pixel electrode 121, and the common voltage signal Vcom and the first electric signal V1 have a voltage difference (about 20V), a strong vertical electric field is formed between the common electrode 111 and the pixel electrode 121, and the first color cholesteric liquid crystal molecules 131 rotate and stop in the H state (transparent state). The common voltage signal Vcom is applied to the common electrode 111, and the second electric signal V2 is applied to the pixel electrode 121, the second electric signal V2 and the common voltage signal Vcom have a voltage difference (for example, 20V), and the second electric signal V2 gradually becomes the same as the common voltage signal Vcom within a first preset time, that is, the second electric signal V2 first has a large voltage difference with the common voltage signal Vcom, and then slowly decreases and becomes the same as the common voltage signal Vcom; therefore, a strong vertical electric field is first formed between the common electrode 111 and the pixel electrode 121, and then the vertical electric field slowly disappears, so that the cholesteric liquid crystal in the first color cholesteric liquid crystal molecules 131 rotates and stops in the FC state, which is a scattering state and has a scattering effect. The common voltage signal Vcom is applied to the common electrode 111, and the third electric signal V3 is applied to the pixel electrode 121, the third electric signal V3 and the common voltage signal Vcom have a voltage difference (for example, 30V), and the third electric signal V3 directly becomes the same as the common voltage signal Vcom at a second preset time, and the second preset time is less than the first preset time, that is, the third electric signal V3 first has a large voltage difference with the common voltage signal Vcom, and then quickly decreases and becomes the same as the common voltage signal Vcom; therefore, a strong vertical electric field is first formed between the common electrode 111 and the pixel electrode 121, and then the vertical electric field quickly disappears, so that the first color cholesteric liquid crystal molecules 131 rotate and stop in the P state, which is a reflection state. Among them, the arrangement direction of the cholesteric liquid crystal is different, the reflected visible light spectrum is different, the remaining spectrum is transmitted, and the P state and the FC state do not need voltage to maintain. The reflection spectrum band (Δλ) of the cholesteric liquid crystal molecules is proportional to the screw moment (Po) and the average refractive index (n=(ne+no) / 2) of the cholesteric liquid crystal molecules, and the formula is: Δλ=nPo, therefore, cholesteric liquid crystal molecules with different pitches can reflect light of different colors in the reflection state.

[0068] As Figure 4As shown, the array substrate 12 is provided with multiple scan lines 101, multiple data lines 102, multiple first thin-film transistors 103, and multiple second thin-film transistors 104. Each pixel unit P is provided with a first thin-film transistor 103 and a second thin-film transistor 104. In this embodiment, the multiple scan lines 101 include a first scan line 101a and a second scan line 101b. The upper side of each row of pixel units P is provided with a corresponding first scan line 101a, and the lower side of each row of pixel units P is provided with a corresponding second scan line 101b. The first scan line 101a and the second scan line 101b are provided between any two rows of pixel units P. In each pixel unit P, the first sub-pixel electrode 121a is electrically connected to the corresponding first scan line 101a and data line 102 through the first thin-film transistor 103, and the second sub-pixel electrode 121b is electrically connected to the corresponding second scan line 101b and data line 102 through the second thin-film transistor 104. Both the first sub-pixel electrode 121a and the second sub-pixel electrode 121b in each pixel unit P are connected to the same data line 102. The thin-film transistors 103 and 104 each include a gate, an active layer, a drain, and a source. The gate and scan line 101 are located on the same layer and electrically connected. The gate and active layer are isolated by an insulating layer. The source is electrically connected to the data line 102, and the drain is electrically connected to the pixel electrode 121 through a contact hole.

[0069] like Figures 2 to 4 As shown, in one embodiment, the liquid crystal layer 13 further includes first color dye liquid crystal molecules 132 mixed with the first color cholesterol liquid crystal molecules 131, and the first color dye liquid crystal molecules 132 rotate synchronously with the first color cholesterol liquid crystal molecules 131. Multiple pixel units P include a first pixel unit P1 and a second pixel unit P2. The opposing substrate 11 is transparent in the area corresponding to the first pixel unit P1, and the opposing substrate 11 has a color resist layer 113 in the area corresponding to the second pixel unit P2. The array substrate 12 has a reflective layer in the area corresponding to the second pixel unit P2. Specifically, for example, the opposing substrate 11 has a transparent color resist W in the area corresponding to the first pixel unit P1 and a color resist in the area corresponding to the second pixel unit P2. In other embodiments, the opposing substrate 11 may not have a transparent color resist W in the area corresponding to the first pixel unit P1, which is not a limitation. Alternatively, the liquid crystal layer 13 may not have the first color dye liquid crystal molecules 132, and the opposing substrate 11 may not have a color resist layer 113, meaning that the reflective display device 10 can use conventional configurations for all structures other than the pixel structure and the array substrate 12.

[0070] When the first pixel unit P1 is in the bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the first pixel unit P1 are both in the flat attitude, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in the reflective state. When the first pixel unit P1 is in the dark state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the first pixel unit P1 are both perpendicular to the array substrate 12 and the opposite substrate 11 or are both in the disordered inclined state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in the transparent state or the haze state, the ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer, showing black or haze black. When the second pixel unit P2 is in the bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second pixel unit P2 are both perpendicular to the array substrate 12 and the opposite substrate 11 or are both in the disordered inclined state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the second pixel unit P2 are all in the transparent state or the haze state; when the second pixel unit P2 is in the dark state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second pixel unit P2 are both in the flat attitude, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the second pixel unit P2 are all in the reflective state, and the ambient light is absorbed by the color resistance layer 113 and the first color dye liquid crystal molecules 132, showing black.

[0071] It can be understood that the first pixel unit P1 and the second pixel unit P2 each include a first sub-pixel area Pa and a second sub-pixel area Pb. Specifically, for the first pixel unit P1, when the first sub-pixel area Pa and / or the second sub-pixel area Pb is in a bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding area of the first sub-pixel area Pa and / or the second sub-pixel area Pb each assume a flat posture, so that the first color cholesteric liquid crystal molecules 131 in the corresponding area of the first sub-pixel area Pa and / or the second sub-pixel area Pb are each in a reflective state; when the first sub-pixel area Pa and / or the second sub-pixel area Pb is in a dark state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding area of the first sub-pixel area Pa and / or the second sub-pixel area Pb are each perpendicular to the opposing substrate 11 and the array substrate 12 or assume a disordered tilted state, so that the first color cholesteric liquid crystal molecules 131 in the corresponding area of the first sub-pixel area Pa and / or the second sub-pixel area Pb are each in a transparent state or a haze state, and ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer, appearing black or haze black. For the second pixel unit P2, when the first sub-pixel area Pa and / or the second sub-pixel area Pb is in a bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding area of the first sub-pixel area Pa and / or the second sub-pixel area Pb are each perpendicular to the opposing substrate 11 and the array substrate 12 or assume a disordered tilted state, so that the first color cholesteric liquid crystal molecules 131 in the corresponding area of the first sub-pixel area Pa and / or the second sub-pixel area Pb are each in a transparent state or a haze state; when the first sub-pixel area Pa and / or the second sub-pixel area Pb is in a dark state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding area of the first sub-pixel area Pa and / or the second sub-pixel area Pb each assume a flat posture, so that the first color cholesteric liquid crystal molecules 131 in the corresponding area of the first sub-pixel area Pa and / or the second sub-pixel area Pb are each in a reflective state, and ambient light is absorbed by the color resist layer 113 and the first color dye liquid crystal molecules 132 together, appearing black.

[0072] The first color dye liquid crystal molecules 132 adopt positive dye liquid crystal molecules, the light absorption capacity of the long axis of the positive dye liquid crystal molecules is greater than that of the short axis, the positive dye liquid crystal molecules have the characteristics of strong light absorption capacity of the long axis and very weak light absorption capacity of the short axis. The long axis absorbs part of the light, thereby presenting the color corresponding to the first color dye liquid crystal molecules 132. For example, the first color dye liquid crystal molecules 132 adopt purple dye liquid crystal molecules, the long axis of the purple dye liquid crystal molecules can absorb green bands and present purple; similarly, if it is a red dye liquid crystal molecule, the long axis of the red dye liquid crystal molecule can absorb cyan bands and present red. Of course, the first color dye liquid crystal molecules 132 can also adopt other single-color dye liquid crystal molecules, such as blue, green, yellow, etc.

[0073] In the embodiment, the second pixel unit P2 includes a second color pixel unit P21 and a third color pixel unit P22, the color filter layer 113 includes a second color filter layer 113a corresponding to the second color pixel unit P21 and a third color filter layer 113b corresponding to the third color pixel unit P22, and the second color pixel unit P21, the third color pixel unit P22 and the first pixel unit P1 are periodically arranged in the row direction. The first color, the second color and the third color are one of blue, red and green, respectively. In the embodiment, the first color cholesteric liquid crystal molecule 131 is a blue cholesteric liquid crystal molecule, the first color dye liquid crystal molecule 132 is a blue dye liquid crystal molecule, the second color filter layer 113a is a red color filter, and the third color filter layer 113b is a green color filter. Of course, in other embodiments, the first color cholesteric liquid crystal molecule 131 is a blue cholesteric liquid crystal molecule, the first color dye liquid crystal molecule 132 is a blue dye liquid crystal molecule, the second color filter layer 113a is a green color filter, and the third color filter layer 113b is a red color filter; or the first color cholesteric liquid crystal molecule 131 is a red cholesteric liquid crystal molecule, the first color dye liquid crystal molecule 132 is a red dye liquid crystal molecule, the second color filter layer 113a is a blue color filter, and the third color filter layer 113b is a green color filter; or the first color cholesteric liquid crystal molecule 131 is a red cholesteric liquid crystal molecule, the first color dye liquid crystal molecule 132 is a red dye liquid crystal molecule, the second color filter layer 113a is a green color filter, and the third color filter layer 113b is a blue color filter; or the first color cholesteric liquid crystal molecule 131 is a green cholesteric liquid crystal molecule, the first color dye liquid crystal molecule 132 is a green dye liquid crystal molecule, the second color filter layer 113a is a blue color filter, and the third color filter layer 113b is a red color filter; or the first color cholesteric liquid crystal molecule 131 is a green cholesteric liquid crystal molecule, the first color dye liquid crystal molecule 132 is a green dye liquid crystal molecule, the second color filter layer 113a is a red color filter, and the third color filter layer 113b is a blue color filter. This is not limited here.

[0074] In the embodiment, the plurality of pixel electrodes 121 include a transparent pixel electrode 1211 and a reflective pixel electrode 1212, the transparent pixel electrode 1211 corresponds to the first pixel unit P1, and the reflective pixel electrode 1212 corresponds to the second pixel unit P2. The reflective pixel electrode 1212 is multiplexed as a reflective layer. It can be understood that the transparent pixel electrode 1211 and the reflective pixel electrode 1212 each include a first sub-pixel electrode 121a and a second sub-pixel electrode 121b. The transparent pixel electrode 1211 can be made of a transparent electrode such as indium tin oxide (ITO) or indium zinc oxide (IZO), and the reflective pixel electrode 1212 can be made of a transparent electrode such as indium tin oxide (ITO) or indium zinc oxide (IZO) and aluminum (Al) or silver (Ag). For example, the transparent pixel electrode 1211 and the reflective pixel electrode 1212 are etched from the same layer of transparent conductive layer, and then a layer of aluminum (Al) or silver (Ag) is coated on the reflective pixel electrode 1212 to increase the conductivity of the reflective pixel electrode 1212. Of course, the reflective pixel electrode 1212 can also be made of aluminum (Al) or silver (Ag) alone. Alternatively, in other embodiments, the pixel electrodes 121 can also be made of a transparent electrode such as indium tin oxide (ITO) or indium zinc oxide (IZO), and the reflective layer is made of a layer of aluminum (Al) or silver (Ag) alone.

[0075] Further, the array substrate 12 is provided with a light-absorbing layer 122, which is used to absorb light passing through the liquid crystal layer 13, so that the reflective display device 10 is darker in black state, to improve the contrast. Optionally, the light-absorbing layer 122 is made of black ink, and the L value (representing lightness) of the black ink is greater than 25 and the OD value (optical density) is greater than 4, so that the light-absorbing layer 122 has the characteristics of high blackness and good glossiness, to ensure that the black picture is darker. Of course, the light-absorbing layer 122 can be made of BM material. In the embodiment, the light-absorbing layer 122 is a planar structure covering the array substrate 12, and the light-absorbing layer 122 covers the side of the array substrate 12 away from the liquid crystal layer 13.

[0076] Furthermore, a black matrix 112 is provided on the opposing substrate 11, which corresponds to the non-display area at the edge of the reflective display device 10. The black matrix 112 is not required in the display area of ​​the reflective display device 10. In this embodiment, the second color resist layer 113a and the third color resist layer 113b of the color resist layer 113 in the opposing substrate 11 correspond to each pixel electrode 121 in the array substrate 12. That is, a gap is provided between the second color resist layer 113a and the third color resist layer 113b, and this gap corresponds to the scan line 101, data line 102, and thin-film transistor 103 on the opposing substrate 11. Since the scan line 101, data line 102, and thin-film transistor 103 on the opposing substrate 11 are formed of metal, the scan line 101, data line 102, and thin-film transistor 103 at this gap can reflect ambient light to a certain extent, thereby improving display brightness. In other embodiments, a transparent color resist W may also be provided between the gap between the second color resist layer 113a and the third color resist layer 113b, which is not limited here.

[0077] This application also provides a driving method for a reflective display device, used to drive the reflective display device 10 as described above. The driving method includes:

[0078] Figure 3 This is a schematic diagram of the pixel arrangement structure of the reflective display device in the dark state according to Embodiment 1 of the present invention. Figure 3 As shown, when pixel unit P is in a dark state, the first sub-pixel region Pa and the second sub-pixel region Pb are both controlled to be in a dark state. In this embodiment, for the first pixel unit P1, when the first pixel unit P1 is in a dark state, the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding areas of the first sub-pixel region Pa and the second sub-pixel region Pb are controlled to be perpendicular to the opposing substrate 11 and the array substrate 12 or to be in a disordered tilted state, so that the first color cholesterol liquid crystal molecules 131 in the corresponding areas of the first sub-pixel region Pa and the second sub-pixel region Pb are both in a transparent state or a hazy state, and ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer, appearing black or hazy black. For the second pixel unit P2, when the second pixel unit P2 is in a dark state, the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding areas of the first sub-pixel area Pa and the second sub-pixel area Pb are both in a flat position, so that the first color cholesterol liquid crystal molecules 131 in the corresponding areas of the first sub-pixel area Pa and the second sub-pixel area Pb are both in a reflective state, and the ambient light is absorbed by the color resist layer 113 and the first color dye liquid crystal molecules 132, resulting in black.

[0079] Figure 7is a schematic view of pixel arrangement structure of the reflective display device in the first gray scale brightness state in embodiment one of the present application. As shown in Figure 7 When the pixel unit P is in the first gray scale brightness, the first sub-pixel area Pa is controlled to be in the bright state, and the second sub-pixel area Pb is controlled to be in the dark state. In this embodiment, for the first pixel unit P1, when the first sub-pixel area Pa is in the bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding area of the first sub-pixel area Pa are both in the flat posture, so that the first color cholesteric liquid crystal molecules 131 in the corresponding area of the first sub-pixel area Pa are all in the reflective state; when the second sub-pixel area Pb is in the dark state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding area of the second sub-pixel area Pb are both perpendicular to the opposite substrate 11 and the array substrate 12 or are both in the disordered inclined state, so that the first color cholesteric liquid crystal molecules 131 in the corresponding area of the second sub-pixel area Pb are all in the transparent state or the fog state, and the ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer, showing black or fog black. For the second pixel unit P2, when the first sub-pixel area Pa is in the bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding area of the first sub-pixel area Pa are both perpendicular to the opposite substrate 11 and the array substrate 12 or are both in the disordered inclined state, so that the first color cholesteric liquid crystal molecules 131 in the corresponding area of the first sub-pixel area Pa are all in the transparent state or the fog state; when the second sub-pixel area Pb is in the dark state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding area of the second sub-pixel area Pb are both in the flat posture, so that the first color cholesteric liquid crystal molecules 131 in the corresponding area of the second sub-pixel area Pb are all in the reflective state, and the ambient light is absorbed by the color resistance layer 113 and the first color dye liquid crystal molecules 132, showing black.

[0080] Figure 8 is a schematic view of pixel arrangement structure of the reflective display device in the second gray scale brightness state in embodiment one of the present application. As shown in Figure 8As shown, when the pixel unit P is in the second gray scale brightness, the first sub-pixel area Pa is controlled to be in the dark state, and the second sub-pixel area Pb is controlled to be in the bright state. In this embodiment, for the first pixel unit P1, when the first sub-pixel area Pa is in the dark state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the area corresponding to the first sub-pixel area Pa are both perpendicular to the opposite substrate 11 and the array substrate 12 or both present a disordered tilted state, so that the first color cholesteric liquid crystal molecules 131 in the area corresponding to the first sub-pixel area Pa are all in the transparent state or the haze state, the ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer, presenting black or haze black; when the second sub-pixel area Pb is in the bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the area corresponding to the second sub-pixel area Pb are both in the flat posture, so that the first color cholesteric liquid crystal molecules 131 in the area corresponding to the second sub-pixel area Pb are all in the reflective state. For the second pixel unit P2, when the first sub-pixel area Pa is in the dark state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the area corresponding to the first sub-pixel area Pa are both in the flat posture, so that the first color cholesteric liquid crystal molecules 131 in the area corresponding to the first sub-pixel area Pa are all in the reflective state, and the ambient light is absorbed by the color resistance layer 113 and the first color dye liquid crystal molecules 132 together, presenting black; when the second sub-pixel area Pb is in the bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the area corresponding to the second sub-pixel area Pb are both perpendicular to the opposite substrate 11 and the array substrate 12 or both present a disordered tilted state, so that the first color cholesteric liquid crystal molecules 131 in the area corresponding to the second sub-pixel area Pb are all in the transparent state or the haze state.

[0081] Figure 9 is a schematic view of the pixel arrangement structure of the reflective display device in the third gray scale brightness state in the first embodiment of the present application. As shown in the figure, the pixel unit P is in the third gray scale brightness state, and the first sub-pixel area Pa is controlled to be in the bright state, and the second sub-pixel area Pb is controlled to be in the dark state. Figure 9As shown, when the pixel unit P is in the third gray scale brightness, the first sub-pixel area Pa and the second sub-pixel area Pb are both controlled to be in the bright state. In this embodiment, for the first pixel unit P1, when the first pixel unit P1 is in the bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding areas of the first sub-pixel area Pa and the second sub-pixel area Pb are both in the flat lying state, so that the first color cholesteric liquid crystal molecules 131 in the corresponding areas of the first sub-pixel area Pa and the second sub-pixel area Pb are all in the reflective state. For the second pixel unit P2, when the second pixel unit P2 is in the bright state, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding areas of the first sub-pixel area Pa and the second sub-pixel area Pb are both perpendicular to the opposite substrate 11 and the array substrate 12 or are both in the disordered inclined state, so that the first color cholesteric liquid crystal molecules 131 in the corresponding areas of the first sub-pixel area Pa and the second sub-pixel area Pb are all in the transparent state or the fog state.

[0082] Figure 10 is a structural schematic diagram of the reflective display device in the first embodiment of the present application when displaying a pure blue picture. Figure 10 As shown, when the reflective display device 10 displays the first color (blue), all the first pixel units P1 are controlled to be in the bright state and all the second pixel units P2 are controlled to be in the dark state. Specifically, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding areas of the first pixel unit P1 are both in the flat lying state, so that the first color cholesteric liquid crystal molecules 131 in the corresponding areas of the first pixel unit P1 are all in the reflective state, and the first color light (blue light) is reflected by the liquid crystal layer 13 in the corresponding areas of the first pixel unit P1; and the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding areas of the second pixel unit P2 (the second color pixel unit P21 and the third color pixel unit P22) are both in the flat lying state, so that the first color cholesteric liquid crystal molecules 131 in the corresponding areas of the second pixel unit P2 are all in the reflective state, and the ambient light is absorbed by the color resistance layer 113 and the first color dye liquid crystal molecules 132, appearing black.

[0083] Figure 11 is one of the structural schematic diagrams of the reflective display device in the first embodiment of the present application when displaying a pure red picture. Figure 12 is one of the structural schematic diagrams of the reflective display device in the first embodiment of the present application when displaying a pure red picture. Figure 11 and Figure 12 As shown, when the reflective display device 10 displays the second color (red), all the first pixel units P1 and the third color pixel units P22 are controlled to be in the dark state and all the second color pixel units P21 are controlled to be in the bright state. Specifically, as shown in Figure 11As shown, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the first pixel unit P1 are controlled to be perpendicular to the opposed substrate 11 and the array substrate 12, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in the transparent state. At this time, the ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer 122, so that the display appears black. The first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the third color pixel unit P22 are controlled to be in the flat-lying state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the third color pixel unit P22 are all in the reflective state. The ambient light is absorbed by the color filter layer 113 and the first color dye liquid crystal molecules 132, so that the display appears black. The first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second color pixel unit P21 are controlled to be perpendicular to the opposed substrate 11 and the array substrate 12, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the second color pixel unit P21 are all in the transparent state. At this time, the second color pixel unit P21 reflects the light (red light) corresponding to the color of the second color filter layer 113a. Alternatively, as shown, the first color cholesteric liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are controlled to be in the disordered tilted state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in the haze state. At this time, the ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer 122, so that the display appears haze black. The first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the third color pixel unit P22 are controlled to be in the flat-lying state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the third color pixel unit P22 are all in the reflective state. The ambient light is absorbed by the color filter layer 113 and the first color dye liquid crystal molecules 132, so that the display appears black. The first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second color pixel unit P21 are controlled to be in the disordered tilted state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the second color pixel unit P21 are all in the haze state. At this time, the second color pixel unit P21 reflects the light (red light) corresponding to the color of the second color filter layer 113a. Due to the haze state of the first color cholesteric liquid crystal molecules 131, the second color pixel unit P21 is in the slow reflection state, and a haze red display effect is achieved. Figure 12

[0084] Figure 13 is a structural schematic diagram of the reflective display device in Embodiment One of the present application when displaying a pure green image. Figure 14 is a structural schematic diagram of the reflective display device in Embodiment One of the present application when displaying a pure green image. Figure 13 and Figure 14 ​As shown, when the reflective display device 10 displays the third color (green), it controls all first pixel units P1 and second color pixel units P21 to be in a dark state and all third color pixel units P22 to be in a bright state. Specifically, as... Figure 13 As shown, the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the first pixel unit P1 are both perpendicular to the opposing substrate 11 and the array substrate 12, so that the first color cholesterol liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in a transparent state. At this time, ambient light passes directly through the liquid crystal layer 13 and is absorbed by the light-absorbing layer 122, appearing black; and the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second color pixel unit P21 are both in a flat position, so that the region corresponding to the second color pixel unit P21 is in a flat position. The first color cholesterol liquid crystal molecules 131 are all in a reflective state. Ambient light is absorbed by the color resist layer 113 and the first color dye liquid crystal molecules 132, resulting in black. Furthermore, the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the area corresponding to the third color pixel unit P22 are controlled to be perpendicular to the opposing substrate 11 and the array substrate 12, so that the first color cholesterol liquid crystal molecules 131 in the area corresponding to the third color pixel unit P22 are all in a transparent state. At this time, the third color pixel unit P22 reflects light (green light) corresponding to the color of the third color resist layer 113b. Alternatively, as... Figure 14 As shown, the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the area corresponding to the first pixel unit P1 are in a disordered tilted state, so that the first color cholesterol liquid crystal molecules 131 in the area corresponding to the first pixel unit P1 are all in a fog state. At this time, ambient light passes directly through the liquid crystal layer 13 and is absorbed by the light-absorbing layer 122, resulting in a foggy black color. The system controls the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the area corresponding to the second color pixel unit P21 to lie flat, so that the first color cholesterol liquid crystal molecules 131 in the area corresponding to the second color pixel unit P21 are all in a reflective state. Ambient light is absorbed by the color resist layer 113 and the first color dye liquid crystal molecules 132, resulting in black. The system also controls the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the area corresponding to the third color pixel unit P22 to be in a disordered tilted state, so that the first color cholesterol liquid crystal molecules 131 in the area corresponding to the third color pixel unit P22 are all in a foggy state. At this time, the third color pixel unit P22 reflects light (green light) corresponding to the color of the third color resist layer 113b. Since the first color cholesterol liquid crystal molecules 131 are in a foggy state, the third color pixel unit P22 is in a slow reflection state, achieving a foggy green display effect.

[0085] Figure 15This is one of the structural schematic diagrams of the reflective display device in Embodiment 1 of the present invention when displaying a white image. Figure 16 This is the second schematic diagram of the reflective display device in Embodiment 1 of the present invention when displaying a white image. Figure 15 and Figure 16 As shown, when the reflective display device 10 displays white, it controls all first pixel units P1 and second pixel units P2 (second color pixel unit P21 and third color pixel unit P22) to be in a bright state. Specifically, as... Figure 15 As shown, the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the first pixel unit P1 are both in a flat position, so that the first color cholesterol liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in a reflective state. At this time, the liquid crystal layer 13 in the region corresponding to the first pixel unit P1 reflects the first color light (blue light); and the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second color pixel unit P21 are both perpendicular to the opposing substrate 11 and the array substrate 12, so that the region corresponding to the second color pixel unit P21 is perpendicular to the opposing substrate 11 and the array substrate 12. The first color cholesterol liquid crystal molecules 131 are all in a transparent state. At this time, the second color pixel unit P21 reflects light (red light) corresponding to the color of the second color resist layer 113a; and the first color cholesterol liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the area corresponding to the third color pixel unit P22 are all perpendicular to the opposing substrate 11 and the array substrate 12, so that the first color cholesterol liquid crystal molecules 131 in the area corresponding to the third color pixel unit P22 are all in a transparent state. At this time, the third color pixel unit P22 reflects light (green light) corresponding to the color of the third color resist layer 113b. Or, as Figure 16As shown, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the first pixel unit P1 are controlled to present a flat posture, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in a reflective state, at this time, the liquid crystal layer 13 in the region corresponding to the first pixel unit P1 reflects the first color light (blue light); and the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second color pixel unit P21 are controlled to present a disordered inclined state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the second color pixel unit P21 are all in a fog state, at this time, the second color pixel unit P21 reflects the light (red light) corresponding to the color of the second color color resistance layer 113a, since the first color cholesteric liquid crystal molecules 131 are in a fog state, the second color pixel unit P21 presents a slow reflection state, realizing a fog red display effect; and the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the third color pixel unit P22 are controlled to present a disordered inclined state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the third color pixel unit P22 are all in a fog state, at this time, the third color pixel unit P22 reflects the light (green light) corresponding to the color of the third color color resistance layer 113b, since the first color cholesteric liquid crystal molecules 131 are in a fog state, the third color pixel unit P22 presents a slow reflection state, realizing a fog green display effect. Wherein, the blue, red and green light beams are mixed with each other to form a white light beam.

[0086] Figure 17 is a structural schematic diagram of the reflective display device in the embodiment one of the present application when displaying a pure black picture. As shown in the figure, Figure 17As shown, when the reflective display device 10 displays a pure black picture, all the first pixel units P1 and the second pixel units P2 (the second color pixel units P21, the third color pixel units P22) are controlled to be in dark state. Specifically, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding region of the first pixel unit P1 are both controlled to be perpendicular to the opposite substrate 11 and the array substrate 12, so that the first color cholesteric liquid crystal molecules 131 in the corresponding region of the first pixel unit P1 are all in transparent state, at this time, the ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer 122, and the black color is presented; and the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding region of the second pixel unit P2 are both controlled to be in flat posture, so that the first color cholesteric liquid crystal molecules 131 in the corresponding region of the second pixel unit P2 (the second color pixel unit P21, the third color pixel unit P22) are all in reflective state, and the ambient light is absorbed by the color filter layer 113 and the first color dye liquid crystal molecules 132, and the black color is presented. Of course, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the corresponding region of the first pixel unit P1 can also be controlled to be in disordered inclined state, so that the first color cholesteric liquid crystal molecules 131 in the corresponding region of the first pixel unit P1 are all in haze state, at this time, the ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer 122, and the haze black color is presented.

[0087] In this embodiment, the reflective display device 10 can also display color. When the reflective display device 10 displays color, the corresponding first pixel unit P1, the second color pixel unit P21 and the third color pixel unit P22 are all controlled to be in bright state. Specifically, the brightness of the first pixel unit P1, the second color pixel unit P21 and the third color pixel unit P22 is adjusted by controlling the bright and dark states of the first sub-pixel area Pa and the second sub-pixel area Pb in the first pixel unit P1, the second color pixel unit P21 and the third color pixel unit P22. For details, reference can be made to the description of the first color pixel unit P1, the second color pixel unit P21 and the third color pixel unit P22 in the embodiment one. Figure 3 、 Figures 7 to 9

[0088] [Embodiment Two]

[0089] Figure 18 is one of the schematic diagrams of the planar structure of the array substrate in the embodiment two of the present application. Figure 19 is another schematic diagram of the planar structure of the array substrate in the embodiment two of the present application. As shown in Figure 18 and Figure 19 , the reflective display device and the driving method provided by the embodiment two of the present application are basically the same as those in the embodiment one ( Figures 1 to 17 ), and the difference lies in that, in this embodiment: ​

[0090] As shown in Figure 18 Fig. 1, the array substrate 12 is provided with a plurality of scan lines 101, a plurality of data lines 102, a plurality of first thin film transistors 103 and a plurality of second thin film transistors 104. Each pixel unit P is provided with a first thin film transistor 103 and a second thin film transistor 104. In this embodiment, the plurality of scan lines 101 includes a first scan line 101a and a second scan line 101b. The upper side of each row of pixel units P is provided with the first scan line 101a, and the lower side of each row of pixel units P is provided with the second scan line 101b. The first scan line 101a and the second scan line 101b are arranged between any two rows of pixel units P. In each pixel unit P, the first sub-pixel electrode 121a is electrically connected to the corresponding first scan line 101a and data line 102 through the first thin film transistor 103, and the second sub-pixel electrode 121b is electrically connected to the corresponding second scan line 101b and data line 102 through the second thin film transistor 104. The first sub-pixel electrode 121a and the second sub-pixel electrode 121b in each pixel unit P are connected to two different data lines 102, respectively.

[0091] As shown in Figure 19 Fig. 2, in one embodiment, the array substrate 12 is provided with a plurality of scan lines 101, a plurality of data lines 102, a plurality of first thin film transistors 103 and a plurality of second thin film transistors 104. The plurality of data lines 102 includes a first data line 102a and a second data line 102b. The left side of each column of pixel units P is provided with the first data line 102a, and the right side of each column of pixel units P is provided with the second data line 102b. The first data line 102a and the second data line 102b are arranged between any two columns of pixel units P. In each pixel unit P, the first sub-pixel electrode 121a is electrically connected to the corresponding scan line 101 and first data line 102a through the first thin film transistor 103, and the second sub-pixel electrode 121b is electrically connected to the corresponding scan line 101 and second data line 102b through the second thin film transistor 104. The first sub-pixel electrode 121a and the second sub-pixel electrode 121b in each pixel unit P are connected to the same scan line 101. Of course, in other embodiments, the first sub-pixel electrode 121a and the second sub-pixel electrode 121b in each pixel unit P can also be connected to two different scan lines 101, respectively.

[0092] Those skilled in the art should understand that the remaining structure and working principle of this embodiment are the same as those of Embodiment 1, which will not be described here.

[0093] [Embodiment Three]

[0094] Figure 20 is a schematic diagram of the planar structure of the gate drive circuit in Embodiment Three. AsFigure 20 As shown, the reflective display device and driving method provided in Embodiment 3 of the present invention are the same as those in Embodiment 1. Figures 1 to 17 The reflective display device and driving method in this embodiment are basically the same, except that in this embodiment:

[0095] A gate driving circuit is provided on the array substrate 12. The gate driving circuit includes multiple main scan lines 1, a first control line 2, a second control line 3, multiple third thin-film transistors 4, and multiple fourth thin-film transistors 5. The first scan line 101a is conductively connected to the first control line 2 and the corresponding main scan line 1 through the third thin-film transistors 4. The second scan line 101b is conductively connected to the second control line 3 and the corresponding main scan line 1 through the fourth thin-film transistors 5. The third thin-film transistors 4 controlling the first scan line 101a and the fourth thin-film transistors 5 controlling the second scan line 101b on both sides of the same row of pixel unit P are connected to the same main scan line 1. By designing the gate driving circuit in this embodiment, the dual-gate architecture in this application can use a conventional gate driving chip (G-IC), and the number of pins of the gate driving chip can be reduced by half.

[0096] This application also provides a driving method for a reflective display device, which is consistent with Embodiment 1 ( Figures 1 to 17 The driving method is basically the same as that in the previous embodiment, except that in this embodiment, the driving method further includes:

[0097] Figure 21 This is a waveform diagram of the first gate drive signal in Embodiment 3 of the present invention. Figure 21 As shown, the first control line 2 and the second control line 3 control the third thin-film transistor 4 and the fourth thin-film transistor 5 to alternately turn on or off. For example, when scanning the first scan line 101a, the first control line 2 is at a high level (H) and controls the third thin-film transistor 4 to turn on, while the second control line 3 is at a low level (L) and controls the fourth thin-film transistor 5 to turn off; when scanning the second scan line 101b, the first control line 2 is at a low level (L) and controls the third thin-film transistor 4 to turn off, while the second control line 3 is at a high level (H) and controls the fourth thin-film transistor 5 to turn on.

[0098] Figure 22 This is one of the waveform diagrams of the second gate drive signal in Embodiment 3 of the present invention. Figure 23 This is the second waveform diagram of the second gate drive signal in Embodiment 3 of the present invention. In another embodiment, such as... Figure 22 As shown, in the Nth frame, the first control line 2 can be high (H) to control the third thin-film transistor 4 to turn on, and the second control line 3 can be low (L) to control the fourth thin-film transistor 5 to turn off; as shown Figure 23As shown, in the N+1th frame, the first control line 2 is low (L) and controls the third thin film transistor 4 to be closed, and the second control line 3 is high (H) and controls the fourth thin film transistor 5 to be opened, N is an integer greater than or equal to 1. Wherein, in the Nth frame, the first control line 2 can be high (H) all the time, or can be switched between high (H) and low (L), and is switched once every scanning line 101; in the N+1th frame, the second control line 3 can be high (H) all the time, or can be switched between high (H) and low (L), and is switched once every scanning line 101.

[0099] Those skilled in the art should understand that the remaining structure and working principle of the embodiment are the same as those of Embodiment One, which will not be repeated here.

[0100] [Embodiment Four]

[0101] Figure 24 is a structural schematic diagram of the reflective display device in the initial state in Embodiment Four of the present application. As shown, Figure 24 the reflective display device and the driving method provided by Embodiment Four of the present application are basically the same as those in Embodiments One ( Figures 1 to 17 ), Two ( Figure 18 ), and Three ( Figure 19 ), except that in the present embodiment: Figures 20 to 23

[0102] The black matrix 112 is provided on the opposed substrate 11, and the black matrix 112 is provided in the display area and the non-display area of the reflective display device 10, and the black matrix 112 separates the plurality of pixel units P from each other in the display area. Compared with Embodiment One, the present embodiment can avoid the problem of color mixing between adjacent pixel units P, but the brightness of the reflective display device 10 will be reduced.

[0103] Those skilled in the art should understand that the remaining structure and working principle of the embodiment are the same as those of Embodiment One, Embodiment Two, and Embodiment Three, which will not be repeated here.

[0104] [Embodiment Five]

[0105] Figure 25 is a structural schematic diagram of the reflective display device in the initial state in Embodiment Five of the present application. Figure 26 is a pixel arrangement structure schematic diagram of the reflective display device in Embodiment Five of the present application. Figure 27 is a planar structure schematic diagram of the array substrate in Embodiment Five of the present application. As shown, Figures 25 to 27 the reflective display device and the driving method provided by Embodiment Five of the present application are basically the same as those in Embodiments One ( Figures 1 to 17 ), Two (​Figure 18 and Figure 19 The reflective display device and the driving method in Embodiment Three ( Figures 20 to 23 ), Embodiment Four ( Figure 24 ) are basically the same, except that in the present embodiment:

[0106] The second pixel unit P2 includes the second color pixel unit P21, and the color resist layer 113 includes the second color color resist layer 113a corresponding to the second color pixel unit P21, wherein the first color and the second color are complementary colors. That is, the second pixel unit P2 only has the second color pixel unit P21, and the color resist layer 113 only has the second color color resist layer 113a, and the plurality of pixel units P have pixel units P of two colors. Among them, a column of first pixel units P1 and a column of second color pixel units P21 are arranged alternately in the row direction. In the present embodiment, the first color cholesteric liquid crystal molecules 131 are blue cholesteric liquid crystal molecules, the first color dye liquid crystal molecules 132 are blue dye liquid crystal molecules, and the second color color resist layer 113a is a cyan color resist. Of course, in other embodiments, the first color and the second color can also be other complementary colors, so that a white screen can be realized after mixing.

[0107] The present application also provides a driving method of a reflective display device, for driving the reflective display device 10 as described above. The driving method comprises:

[0108] When the reflective display device 10 displays the first color (blue), all the first pixel units P1 are controlled to be in the bright state and all the second pixel units P2 are controlled to be in the dark state. Specifically, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the first pixel unit P1 are controlled to be in the flat posture, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in the reflection state, and the liquid crystal layer 13 in the region corresponding to the first pixel unit P1 reflects the first color light (blue light); and the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second pixel unit P2 (the second color pixel unit P21) are controlled to be in the flat posture, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the second pixel unit P2 are all in the reflection state, and the ambient light is absorbed by the color resist layer 113 and the first color dye liquid crystal molecules 132, showing black.

[0109] When the reflective display device 10 displays the second color (cyan), all the first pixel units P1 are controlled to be in the dark state and all the second pixel units P2 are controlled to be in the bright state. Specifically, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the first pixel unit P1 are controlled to be perpendicular to the opposing substrate 11 and the array substrate 12, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in the transparent state, at this time, the ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light-absorbing layer 122, appearing black; and the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second pixel unit P2 (the second color pixel unit P21) are controlled to be perpendicular to the opposing substrate 11 and the array substrate 12 or to be in a disordered tilted state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the second pixel unit P2 are all in the transparent state or the haze state, at this time, the second pixel unit P2 reflects the light (cyan light) corresponding to the color of the second color color resistance layer 113a.

[0110] When the reflective display device 10 displays white, all the first pixel units P1 and the second pixel units P2 are controlled to be in the bright state. Specifically, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the first pixel unit P1 are controlled to be in a flat posture, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the first pixel unit P1 are all in the reflective state, and the liquid crystal layer 13 in the region corresponding to the first pixel unit P1 reflects the first color light (blue light); and the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the region corresponding to the second pixel unit P2 (the second color pixel unit P21) are controlled to be perpendicular to the opposing substrate 11 and the array substrate 12 or to be in a disordered tilted state, so that the first color cholesteric liquid crystal molecules 131 in the region corresponding to the second pixel unit P2 are all in the transparent state or the haze state, at this time, the second pixel unit P2 reflects the light (cyan light) corresponding to the color of the second color color resistance layer 113a. Among them, the blue and cyan light is mixed to form white light.

[0111] When the reflective display device 10 displays a pure black picture, all the first pixel units P1 and the second pixel units P2 (the second color pixel units P21) are controlled to be in the dark state. Specifically, the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the first pixel unit P1 corresponding region are both perpendicular to the opposite substrate 11 and the array substrate 12, so that the first color cholesteric liquid crystal molecules 131 in the first pixel unit P1 corresponding region are all in the transparent state, at this time, the ambient light directly passes through the liquid crystal layer 13 and is absorbed by the light absorbing layer 122, showing black; and the first color cholesteric liquid crystal molecules 131 and the first color dye liquid crystal molecules 132 in the second pixel unit P2 corresponding region are both in the flat attitude, so that the second pixel unit P2 (the first color cholesteric liquid crystal molecules 131 in the corresponding region are all in the reflective state, the ambient light is absorbed by the color resistance layer 113 and the first color dye liquid crystal molecules 132, showing black.

[0112] Those skilled in the art should understand that the remaining structure and working principle of the embodiment are the same as those of the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment, and will not be repeated here.

[0113] [Embodiment Six]

[0114] Figure 28 is a structural schematic diagram of the reflective display device in the initial state in the sixth embodiment of the present application. As shown in Figure 28 , the reflective display device and the driving method provided by the sixth embodiment of the present application are basically the same as those in the first embodiment ( Figures 1 to 17 ), the second embodiment ( Figure 18 ), the third embodiment ( Figure 19 ), the fourth embodiment ( Figures 20 to 23 ), the fifth embodiment ( Figure 24 ), and the difference is that in the present embodiment: Figures 25 to 27

[0115] ​The array substrate 12 is provided with an absorbing layer 122, which is used to absorb light passing through the liquid crystal layer 13, so that the reflective display device 10 is darker in black state, and the contrast is improved. Optionally, the absorbing layer 122 is made of black ink, and the L value (representing brightness) of the black ink is greater than 25 and the OD value (optical density) is greater than 4, so that the absorbing layer 122 has the characteristics of high blackness and good glossiness, and ensures that the black picture is darker. Of course, the absorbing layer 122 can be made of BM material. In the embodiment, the projection of the absorbing layer 122 on the array substrate 12 overlaps with the first pixel unit P1, that is, the absorbing layer 122 is only arranged on the array substrate 12 in the region corresponding to the first pixel unit P1. The absorbing layer 122 can be arranged on the side of the array substrate 12 facing the liquid crystal layer 13 and stacked with the transparent pixel electrode 1211.

[0116] Those skilled in the art should understand that the remaining structure and working principle of the embodiment are the same as those of Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4 and Embodiment 5, and will not be repeated here.

[0117] In this document, the terms "upper", "lower", "left", "right", "front", "back", and the like are defined with reference to the position of the structure in the drawing and the position of the structure relative to each other, only to express the technical solution clearly and conveniently. It should be understood that the use of the terms should not limit the scope of the application. It should also be understood that the terms "first" and "second" used herein are only used for name distinction, and do not limit the quantity and order.

[0118] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed as above with reference to the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the disclosed technical content without departing from the scope of the technical solution of the present application, and the equivalent embodiments of equivalent changes are obtained. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application, without departing from the technical solution of the present application, are still within the protection scope of the present application.

Claims

1. A reflective display device, characterized in that, The system includes a counter substrate (11), an array substrate (12) disposed opposite to the counter substrate (11), and a liquid crystal layer (13) located between the counter substrate (11) and the array substrate (12). The liquid crystal layer (13) includes a first color cholesterol liquid crystal molecule (131) and a first color dye liquid crystal molecule (132) mixed with the first color cholesterol liquid crystal molecule (131). The first color dye liquid crystal molecule (132) rotates synchronously with the first color cholesterol liquid crystal molecule (131). The first color cholesterol liquid crystal molecule (131) reflects first color light in a reflective state. The array substrate (12) is provided with a pixel electrode (121), and the counter substrate (11) is provided with a common electrode (111) that cooperates with the pixel electrode (121). The reflective display device (10) has a plurality of pixel units (P) arranged in an array. Each pixel unit (P) is provided with a pixel electrode (121). The pixel unit (P) includes a first sub-pixel region (Pa) and a second sub-pixel region (Pb) with different areas. The pixel electrode (121) includes a first sub-pixel electrode (121a) and a second sub-pixel electrode (121b) that are independently controlled. The first sub-pixel electrode (121a) corresponds to the first sub-pixel region (Pa), and the second sub-pixel electrode (121b) corresponds to the second sub-pixel region (Pb). The plurality of pixel units (P) include a first pixel unit (P1) and a second pixel unit (P2). The opposing substrate (11) is transparent in the area corresponding to the first pixel unit (P1). The opposing substrate (11) has a color resist layer (113) in the area corresponding to the second pixel unit (P2). The array substrate (12) has a reflective layer in the area corresponding to the second pixel unit (P2). When the first pixel unit (P1) is in a bright state, the first color cholesterol liquid crystal molecules (131) in the area corresponding to the first pixel unit (P1) are all in a reflective state. When the first pixel unit (P1) is in a dark state, the first color cholesterol liquid crystal molecules (131) in the area corresponding to the first pixel unit (P1) are all in a transparent state or a hazy state. When the second pixel unit (P2) is in a bright state, the first color cholesterol liquid crystal molecules (131) in the area corresponding to the second pixel unit (P2) are all in a transparent state or a hazy state. When the second pixel unit (P2) is in a dark state, the first color cholesterol liquid crystal molecules (131) in the area corresponding to the second pixel unit (P2) are all in a reflective state.

2. The reflective display device according to claim 1, characterized in that, The array substrate (12) is provided with multiple scan lines (101), multiple data lines (102), multiple first thin film transistors (103) and multiple second thin film transistors (104). Among the multiple scan lines (101), there are first scan lines (101a) and second scan lines (101b). The upper side of each row of pixel units (P) is provided with the first scan line (101a), and the lower side of each row of pixel units (P) is provided with the second scan line (101b). The first scan line (101a) and the second scan line (101b) are provided between any two rows of pixel units (P). In each pixel unit (P), the first sub-pixel electrode (121a) is electrically connected to the corresponding first scan line (101a) and the data line (102) through the first thin film transistor (103), and the second sub-pixel electrode (121b) is electrically connected to the corresponding second scan line (101b) and the data line (102) through the second thin film transistor (104).

3. The reflective display device according to claim 2, characterized in that, The first sub-pixel electrode (121a) and the second sub-pixel electrode (121b) in each pixel unit (P) are connected to the same data line (102); or the first sub-pixel electrode (121a) and the second sub-pixel electrode (121b) in each pixel unit (P) are connected to two different data lines (102).

4. The reflective display device according to claim 2, characterized in that, The array substrate (12) is provided with a gate driving circuit, which includes multiple main scan lines (1), a first control line (2), a second control line (3), multiple third thin film transistors (4) and multiple fourth thin film transistors (5). The first scan line (101a) is electrically connected to the first control line (2) and the corresponding main scan line (1) through the third thin film transistor (4). The second scan line (101b) is electrically connected to the second control line (3) and the corresponding main scan line (1) through the fourth thin film transistor (5). The third thin film transistors (4) controlling the first scan line (101a) and the fourth thin film transistors (5) controlling the second scan line (101b) on the upper and lower sides of the same row of pixel units (P) are connected to the same main scan line (1).

5. The reflective display device according to claim 1, characterized in that, The array substrate (12) is provided with multiple scan lines (101), multiple data lines (102), multiple first thin film transistors (103) and multiple second thin film transistors (104). Among the multiple data lines (102), there are first data lines (102a) and second data lines (102b). The left side of each column of pixel units (P) is provided with the first data line (102a), and the right side of each column of pixel units (P) is provided with the second data line (102b). The first data line (102a) and the second data line (102b) are provided between any two columns of pixel units (P). In each pixel unit (P), the first sub-pixel electrode (121a) is electrically connected to the corresponding scan line (101) and the first data line (102a) through the first thin film transistor (103), and the second sub-pixel electrode (121b) is electrically connected to the corresponding scan line (101) and the second data line (102b) through the second thin film transistor (104).

6. The reflective display device according to claim 1, characterized in that, The second pixel unit (P2) includes a second color pixel unit (P21), and the color resist layer (113) includes a second color resist layer (113a) corresponding to the second color pixel unit (P21), wherein the first color and the second color are complementary colors; Alternatively, the second pixel unit (P2) includes a second color pixel unit (P21) and a third color pixel unit (P22), and the color resist layer (113) includes a second color resist layer (113a) corresponding to the second color pixel unit (P21) and a third color resist layer (113b) corresponding to the third color pixel unit (P22), wherein the first color, the second color and the third color are each one of red, green and blue.

7. The reflective display device according to claim 1, characterized in that, The plurality of pixel electrodes (121) include a transparent pixel electrode (1211) and a reflective pixel electrode (1212), the transparent pixel electrode (1211) corresponding to the first pixel unit (P1), the reflective pixel electrode (1212) corresponding to the second pixel unit (P2), and the reflective pixel electrode (1212) multiplexing the reflective layer; Alternatively, a light-absorbing layer (122) may be provided on the array substrate (12), the light-absorbing layer (122) may be used to absorb light passing through the liquid crystal layer (13), the projection of the light-absorbing layer (122) on the array substrate (12) may coincide with the first pixel unit (P1), or the light-absorbing layer (122) may be a planar structure that covers the entire surface of the array substrate (12); Alternatively, a black matrix (112) may be provided on the opposing substrate (11), the black matrix (112) corresponding to the non-display area at the edge of the reflective display device (10), or the black matrix (112) may be provided in both the display area and the non-display area of ​​the reflective display device (10), the black matrix (112) spacing out the plurality of pixel units (P) in the display area.

8. A driving method for a reflective display device, characterized in that, The driving method for driving the reflective display device (10) as described in any one of claims 1-7 includes: When the pixel unit (P) is in a dark state, the first sub-pixel region (Pa) and the second sub-pixel region (Pb) are both controlled to be in a dark state; When the pixel unit (P) is at the first gray level brightness, the first sub-pixel area (Pa) is controlled to be in a bright state, and the second sub-pixel area (Pb) is controlled to be in a dark state; When the pixel unit (P) is at the second gray level brightness, the first sub-pixel area (Pa) is controlled to be in a dark state, and the second sub-pixel area (Pb) is controlled to be in a bright state; When the pixel unit (P) is at the third gray level brightness, the first sub-pixel area (Pa) and the second sub-pixel area (Pb) are both controlled to be in a bright state.

9. The driving method for the reflective display device according to claim 8, characterized in that, The array substrate (12) is provided with multiple scan lines (101), multiple data lines (102), multiple first thin-film transistors (103), and multiple second thin-film transistors (104). Each scan line (101) includes a first scan line (101a) and a second scan line (101b). The upper side of each row of pixel units (P) is provided with a corresponding first scan line (101a), and the lower side of each row of pixel units (P) is provided with a corresponding second scan line (101b). A first scan line (101a) and a second scan line (101b) are provided between any two rows of pixel units (P). In each pixel unit (P), the first sub-pixel electrode (121a) is electrically connected to the corresponding first scan line (101a) and data line (102) through the first thin-film transistor (103), and the second sub-pixel electrode (121b) is electrically connected to the corresponding first scan line (101a) and data line (102) through the second thin-film transistor (104). 04) Conductively connected to the corresponding second scan line (101b) and the data line (102); The array substrate (12) is provided with a gate driving circuit, which includes multiple main scan lines (1), a first control line (2), a second control line (3), multiple third thin film transistors (4) and multiple fourth thin film transistors (5). The first scan line (101a) is conductively connected to the first control line (2) and the corresponding main scan line (1) through the third thin film transistor (4). The second scan line (101b) is conductively connected to the second control line (3) and the corresponding main scan line (1) through the fourth thin film transistor (5). The third thin film transistors (4) controlling the first scan line (101a) and the fourth thin film transistors (5) controlling the second scan line (101b) on the upper and lower sides of the same row of pixel units (P) are connected to the same main scan line (1). The driving method includes: The first control line (2) and the second control line (3) control the third thin-film transistor (4) and the fourth thin-film transistor (5) to alternately turn on or off; Alternatively, in frame N, the first control line (2) controls the third thin-film transistor (4) to turn on, and the second control line (3) controls the fourth thin-film transistor (5) to turn off; in frame N+1, the first control line (2) controls the third thin-film transistor (4) to turn off, and the second control line (3) controls the fourth thin-film transistor (5) to turn on, where N is an integer greater than or equal to 1.

Images