Color electronic paper display and driving method

Abstract

The invention discloses a color electronic paper display and a driving method, the color electronic paper display comprises a bistable liquid crystal box and an electronic ink screen laminated on the lower side of the bistable liquid crystal box, and first pixel units of the bistable liquid crystal box are in one-to-one correspondence with second pixel units of the electronic ink screen; the bistable liquid crystal box comprises a color film substrate, a first array substrate and a bistable liquid crystal layer, and a color resistance layer corresponding to the first pixel unit is arranged on the color film substrate; the electronic ink screen comprises an opposed substrate, a second array substrate and ink capsules, and black ink particles and white ink particles which are opposite in polarity are arranged in all the ink capsules. The color film substrate is adopted in the bistable liquid crystal box, so that the electronic paper display can realize color display; the bistable liquid crystal box and the electronic ink screen are mutually stacked, so that the gray scale brightness can be jointly controlled, the gray scale number of the electronic paper display is greatly increased, and the display color gamut of the electronic paper display is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of displays, and particularly to a color electronic paper display and a driving method thereof. Background Art

[0002] Display panels have the advantages of being thin, light, durable, and low power consumption meeting energy conservation and environmental protection requirements. However, they need to be used with a backlight, 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 utilize external light sources to display images, unlike liquid crystal displays that require a backlight. Therefore, in an outdoor environment with strong sunlight, the information on the electronic paper can still be clearly seen without the problem of viewing angles. Moreover, due to their advantages such as power saving, high reflectivity, and contrast ratio, electronic paper displays are now widely used in e-readers (such as e-books, e-newspapers) or other electronic components (such as price tags).

[0003] Existing electronic paper displays usually adopt E-Ink microcapsule technology (microcapsule electronic ink technology), SiPix microcup technology (microcup electrophoretic display technology), Bridgestone electronic liquid powder technology, bistable liquid crystal display (Cholesteric Liquid Crystal Display, CLCD) technology, microelectromechanical system (MEMS) technology, or electrowetting technology. However, the existing electronic paper display technology is not as mature as liquid crystal display technology, with low mass production efficiency and relatively high manufacturing costs. Moreover, existing electronic paper displays can only achieve black-and-white display and cannot achieve full-color display. By controlling its driving waveform, an electronic paper display can usually only achieve 2 4 gray levels, with fewer gray levels and a poor display effect.

[0004] In the prior art, there are electronic paper displays using bistable liquid crystals. Due to the requirements of the pitch of bistable liquid crystals, bistable liquid crystals with one pitch can only reflect one color and transmit light of other colors. Therefore, most electronic paper displays with a single layer of bistable liquid crystals are displayed in the form of yellow background with black characters or black background with yellow characters, black background with red characters or red background with black characters, etc., and cannot achieve full-color display. By controlling its driving waveform, an electronic paper display can usually only achieve 2 5 gray levels, with fewer gray levels and a poor display effect. Summary of the Invention

[0005] In order to overcome the drawbacks and deficiencies existing in the prior art, the object of the present invention is to provide a color electronic paper display and a driving method thereof to solve the problems that electronic paper displays in the prior art cannot achieve full-color display and have fewer gray levels.

[0006] The object of the present invention is achieved by the following technical solutions: The present invention provides a color electronic paper display, including a bistable liquid crystal cell and an electronic ink screen laminated on the lower side of the bistable liquid crystal cell. The bistable liquid crystal cell has a plurality of first pixel units distributed in an array, and the electronic ink screen has second pixel units corresponding to the first pixel units one by one. The bistable liquid crystal cell includes a color film substrate, a first array substrate disposed opposite to the color film substrate, and a bistable liquid crystal layer located between the color film substrate and the first array substrate. When in the reflective state, the bistable liquid crystal layer reflects light of a first color. On the first array substrate, there are first pixel electrodes corresponding to the first pixel units one by one. On the color film substrate, there are color filters corresponding to the first pixel units and a first common electrode cooperating with the first pixel electrodes. The electronic ink screen includes an opposing substrate, a second array substrate disposed opposite to the opposing substrate, and ink capsules located between the opposing substrate and the second array substrate. In all the ink capsules, there are black ink particles and white ink particles with opposite polarities. On the second array substrate, there are second pixel electrodes corresponding to the second pixel units one by one. On the opposing substrate, there is a second common electrode cooperating with the second pixel electrodes.

[0007] Further, among the plurality of first pixel units, there are red pixel units, green pixel units, and blue pixel units. The color filters include a red color filter, a green color filter, and a blue color filter. The red color filter corresponds to the red pixel units, the green color filter corresponds to the green pixel units, and the blue color filter corresponds to the blue pixel units.

[0008] Further, the first color is cyan, yellow, magenta, or white.

[0009] Further, among the plurality of first pixel units, there are white pixel units, and the area of the color film substrate corresponding to the white pixel units is in a transparent state.

[0010] Further, a black matrix is provided on the color film substrate, and the black matrix separates the plurality of first pixel units from each other.

[0011] Further, the first pixel electrode includes independent first sub-pixel electrode blocks and second sub-pixel electrode blocks.

[0012] Further, the second pixel electrode includes independent third sub-pixel electrode blocks and fourth sub-pixel electrode blocks.

[0013] The present application also provides a driving method for a color electronic paper display, which is used to drive the color electronic paper display as described above. The driving method includes: When the pixel is in the dark state, controlling the bistable liquid crystal layer in the corresponding area of the pixel to be in a fog state or a transparent state, and controlling the black ink particles in the ink capsules in the corresponding area of the pixel to concentrate on the side close to the second common electrode; When the pixel is in the bright state, controlling the bistable liquid crystal layer in the corresponding area of the pixel to be in a reflective state and reflect light of a first color, and controlling the black ink particles in the ink capsules in the corresponding area of the pixel to concentrate on the side close to the second common electrode; or, controlling the bistable liquid crystal layer in the corresponding area of the pixel to be in a fog state or a light-transmitting state, and controlling the white ink particles in the ink capsules in the corresponding area of the pixel to concentrate on the side close to the second common electrode; or, controlling the bistable liquid crystal layer in the corresponding area of the pixel to be in a reflective state and reflect light of a first color, and controlling the white ink particles in the ink capsules in the corresponding area of the pixel to concentrate on the side close to the second common electrode.

[0014] Furthermore, among the multiple first pixel units, there are red pixel units, green pixel units, and blue pixel units. The color filter layer includes a red color filter layer, a green color filter layer, and a blue color filter layer. The red color filter layer corresponds to the red pixel unit, the green color filter layer corresponds to the green pixel unit, and the blue color filter layer corresponds to the blue pixel unit. The driving method includes: When the first color is cyan, when the red pixel unit is in the bright state, controlling the bistable liquid crystal layer in the corresponding area of the red pixel unit to be in a fog state, a light-transmitting state, or a reflective state, and controlling the white ink particles in the ink capsules in the corresponding area of the red pixel unit to concentrate on the side close to the second common electrode; Or, when the first color is yellow, when the blue pixel unit is in the bright state, controlling the bistable liquid crystal layer in the corresponding area of the blue pixel unit to be in a fog state, a light-transmitting state, or a reflective state, and controlling the white ink particles in the ink capsules in the corresponding area of the blue pixel unit to concentrate on the side close to the second common electrode; Or, when the first color is magenta, when the green pixel unit is in the bright state, controlling the bistable liquid crystal layer in the corresponding area of the green pixel unit to be in a fog state, a light-transmitting state, or a reflective state, and controlling the white ink particles in the ink capsules in the corresponding area of the green pixel unit to concentrate on the side close to the second common electrode.

[0015] Further, among the multiple first pixel units, there are white pixel units, and the color filter substrate is in a transparent state in the area corresponding to the white pixel units. The driving method includes: When the white pixel unit is in the bright state, control the bistable liquid crystal layer in the area corresponding to the white pixel unit to be in the fog state or the light-transmitting state, and control the white ink particles in the ink capsules in the area corresponding to the white pixel unit to concentrate on the side close to the second common electrode.

[0016] The beneficial effects of the present invention are as follows: By adopting a color filter substrate in the bistable liquid crystal cell, the electronic paper display can achieve color display; and the bistable liquid crystal cell and the electronic ink screen are stacked on top of each other, so that the bistable liquid crystal cell and the electronic ink screen can jointly control the gray-scale brightness, greatly increasing the number of gray scales of the electronic paper display, thereby increasing the display color gamut of the electronic paper display and realizing high-color gamut picture display. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the color electronic paper display in the initial state in Embodiment 1 of the present invention.

[0018] Figure 2 is a schematic plan view of the first array substrate in Embodiment 1 of the present invention.

[0019] Figure 3 is a schematic plan view of the second array substrate in Embodiment 1 of the present invention.

[0020] Figure 4 is a schematic diagram of the principle of the transformation of three states of the bistable liquid crystal in Embodiment 1 of the present invention.

[0021] Figure 5 is a schematic diagram of the driving signals for the transformation of three states of the bistable liquid crystal in Embodiment 1 of the present invention.

[0022] Figure 6 is one of the schematic structural diagrams of the color electronic paper display in the bright state in Embodiment 1 of the present invention.

[0023] Figure 7 is another schematic structural diagram of the color electronic paper display in the bright state in Embodiment 1 of the present invention.

[0024] Figure 8 is yet another schematic structural diagram of the color electronic paper display in the bright state in Embodiment 1 of the present invention.

[0025] Figure 9 is still another schematic structural diagram of the color electronic paper display in the bright state in Embodiment 1 of the present invention.

[0026] Figure 10It is the fifth schematic structural diagram of the color electronic paper display in the bright state in Embodiment 1 of the present invention.

[0027] Figure 11 It is the schematic structural diagram of the color electronic paper display in the black state in Embodiment 1 of the present invention.

[0028] Figure 12 It is the schematic structural diagram of the color electronic paper display in the initial state in Embodiment 2 of the present invention.

[0029] Figure 13 It is the schematic plan view of the first array substrate in Embodiment 2 of the present invention.

[0030] Figure 14 It is the schematic plan view of the second array substrate in Embodiment 2 of the present invention.

[0031] Figure 15 It is the schematic structural diagram of the color electronic paper display in the initial state in Embodiment 3 of the present invention.

[0032] Figure 16 It is the schematic structural diagram of the color electronic paper display in the initial state in Embodiment 4 of the present invention.

[0033] Figure 17 It is the schematic structural diagram of the color electronic paper display in the initial state in Embodiment 5 of the present invention.

[0034] Figure 18 It is the schematic structural diagram of the color electronic paper display in the initial state in Embodiment 6 of the present invention.

[0035] Figure 19 It is the schematic circuit control structure diagram of the color electronic paper display of the present invention. Detailed implementation manners

[0036] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and effects of the color electronic paper display and driving method according to the present invention as follows: [Embodiment 1] Figure 1 It is the schematic structural diagram of the color electronic paper display in the initial state in Embodiment 1 of the present invention. Figure 2 It is the schematic plan view of the first array substrate in Embodiment 1 of the present invention. Figure 3 It is the schematic plan view of the second array substrate in Embodiment 1 of the present invention.

[0037] As Figures 1 to 3As shown in the figure, a color electronic paper display provided by Embodiment 1 of the present invention includes a bistable liquid crystal cell 10 and an electronic ink screen 20 laminated on the lower side of the bistable liquid crystal cell 10. Among them, the side of the reflective display device close to the ambient light is the upper side, and the side away from the ambient light is the lower side, that is, the bistable liquid crystal cell 10 is located on the side of the electronic ink screen 20 close to the ambient light. The bistable liquid crystal cell 10 has a plurality of first pixel units P1 distributed in an array, and the electronic ink screen 20 has second pixel units P2 corresponding to the first pixel units P1 one by one. The bistable liquid crystal cell 10 and the electronic ink screen 20 are bonded together by a transparent adhesive, and the frame sticking method or the full sticking method can be adopted.

[0038] The bistable liquid crystal cell 10 includes a color film substrate 11, a first array substrate 12 disposed opposite to the color film substrate 11, and a bistable liquid crystal layer 13 located between the color film substrate 11 and the first array substrate 12. The color film substrate 11 is located on the side of the bistable liquid crystal cell 10 close to the external environment, and the first array substrate 12 is located on the side of the bistable liquid crystal cell 10 close to the electronic ink screen 20. The bistable liquid crystal layer 13 reflects light of the first color in the reflective state. The bistable liquid crystal molecules in the bistable liquid crystal layer 13 can be left-handed bistable liquid crystal molecules or right-handed bistable liquid crystal molecules. The first array substrate 12 is provided with first pixel electrodes 121 corresponding to the first pixel units P1 one by one. The color film substrate 11 is provided with a color resist layer 113 corresponding to the first pixel units P1 and a first common electrode 111 cooperating with the first pixel electrodes 121. The first pixel electrodes 121 are block electrodes corresponding to the first pixel units P1, the first common electrode 111 is a planar electrode covering the entire color film substrate 11, the first common electrode 111 is disposed on the side of the color resist layer 113 facing the bistable liquid crystal layer 13, and a planarization layer can be provided between the first common electrode 111 and the color resist layer 113, or the first common electrode 111 can directly cover the surface of the color resist layer 113. Among them, an alignment layer may not be provided on the color film substrate 11 and the first array substrate 12, or an alignment layer may be added to improve the reflectivity or increase the viewing angle. Matching a positive high pretilt alignment layer can improve the reflectivity, or matching a negative alignment layer can increase the viewing angle.

[0039] Among them, the bistable liquid crystal in the bistable liquid crystal layer 13 has three stable textures: the P state (Planar, planar texture state, reflective state), the FC state (Focal Conic, focal conic state, fog state), and the H state (transparent state). In the P state, the reflection spectrum of the bistable liquid crystal is in the visible light spectrum range, and the bistable liquid crystal reflects bright colored light, and the specific reflected color can be set according to the pitch of the bistable liquid crystal; when in the FC state, the bistable liquid crystal no longer reflects the above-mentioned colored light, and the light can be scattered and transmitted through the bistable liquid crystal; when in the H state, the bistable liquid crystal no longer reflects the above-mentioned colored light, the light can be directly transmitted through the bistable liquid crystal, and it also has no scattering effect on the light. Under the action of a certain electric field, these three states can be converted into each other. It can be understood that the bistable liquid crystal in this application is, for example, cholesterol liquid crystal, but it is not limited thereto.

[0040] Figure 4 is a schematic diagram of the principle of the transformation of the three states of the bistable liquid crystal in the first embodiment of the present invention. Figure 5 is a schematic diagram of the driving signal for the transformation of the three states of the bistable liquid crystal in the first embodiment of the present invention. As Figure 4 and Figure 5As shown, a common voltage signal Vcom is applied to the first common electrode 111, and a first electrical signal V1 is continuously applied to the first pixel electrode 121. There is a voltage difference (e.g., 16V) between the common voltage signal Vcom and the first electrical signal V1. A strong vertical electric field will be formed between the first common electrode 111 and the first pixel electrode 121, and the bistable liquid crystal in the bistable liquid crystal layer 13 rotates and stops in the H state (transparent state); a common voltage signal Vcom is applied to the first common electrode 111, and a second electrical signal V2 is applied to the first pixel electrode 121. There is a voltage difference (e.g., 16V) between the second electrical signal V2 and the common voltage signal Vcom, and the second electrical signal V2 gradually becomes the same as the common voltage signal Vcom within a first preset time, that is, the second electrical signal V2 first has a large voltage difference from 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 will be formed first between the first common electrode 111 and the first pixel electrode 121, and then the vertical electric field slowly disappears, causing the bistable liquid crystal in the bistable liquid crystal layer 13 to rotate and stop in the FC state, which is a scattering state and has a light-scattering effect; a common voltage signal Vcom is applied to the first common electrode 111, and a third electrical signal V3 is applied to the first pixel electrode 121. There is a voltage difference (e.g., 16V) between the third electrical signal V3 and the common voltage signal Vcom, and the third electrical 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 electrical signal V3 first has a large voltage difference from 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 will be formed first between the first common electrode 111 and the first pixel electrode 121, and then the vertical electric field quickly disappears, causing the bistable liquid crystal in the bistable liquid crystal layer 13 to rotate and stop in the P state, which is a reflective state. Among them, the arrangement directions of the bistable liquid crystals are different, and the reflected visible light spectra are different, and the remaining spectra are transmitted. The reflection spectral band (Δλ) of the bistable liquid crystal is proportional to the pitch (Po) and the birefringence (Δn = ne - no) of the bistable liquid crystal, and its formula is: Δλ = PoΔn. Therefore, bistable liquid crystals with different pitches can reflect light of different colors in the reflective state. The P state and the FC state do not require voltage to maintain.

[0041] In this embodiment, among the multiple first pixel units P1, there are red pixel units, green pixel units, and blue pixel units. The color filter layer 113 includes a red color filter layer 113a, a green color filter layer 113b, and a blue color filter layer 113c. The red color filter layer 113a corresponds to the red pixel units, the green color filter layer 113b corresponds to the green pixel units, and the blue color filter layer 113c corresponds to the blue pixel units. Thus, the reflective display device can achieve the display of various colors according to the color mixing principle of red / green / blue three-color light. Among them, a column of green pixel units, a column of blue pixel units, and a column of red pixel units are alternately arranged in sequence along the row direction. The peak transmittance of the red color filter layer 113a to light is near 650 nm; the peak transmittance of the green color filter layer 113b to light is near 550 nm, and the transmittance is above 20% at wavelengths from 450 nm to 620 nm; the peak transmittance of the blue color filter layer 113c to light is near 460 nm.

[0042] In this embodiment, the first color is cyan, that is, the first color is the complementary color of red. All the bistable liquid crystal layers 13 reflect cyan light in the reflective state, and the peak reflectance of the bistable liquid crystal layer 13 to light is near 500 nm.

[0043] Furthermore, a black matrix 112 is provided on the color film substrate 11. The black matrix 112 separates the multiple first pixel units P1 from each other, that is, the black matrix 112 on the color film substrate 11 is used to separate the red color filter layer 113a, the green color filter layer 113b, and the blue color filter layer 113c from each other, thereby avoiding the problem of color mixing between adjacent first pixel units P1. Among them, the projection of the black matrix 112 on the first array substrate 12 corresponds to the first scan line 101, the first data line 102, and the first thin film transistor 103, so as to correspond to the first scan line 101, the first data line 102, and the first thin film transistor 103 and achieve a light effect.

[0044] As Figure 2 shown, the first array substrate 12 is provided with multiple first scan lines 101, multiple first data lines 102, and multiple first thin film transistors 103. The first array substrate 12 is provided with a first pixel electrode 121 and a first thin film transistor 103 in the area corresponding to each first pixel unit P1. The first pixel electrode 121 is electrically connected to the first scan line 101 and the first data line 102 adjacent to the first thin film transistor 103 through the first thin film transistor 103. Among them, the first thin film transistor 103 includes a first gate, a first active layer, a first drain, and a first source. The first gate and the first scan line 101 are located on the same layer and electrically connected. The first gate and the first active layer are separated by an insulating layer. The first source is electrically connected to the first data line 102, and the first drain is electrically connected to the first pixel electrode 121 through a contact hole.

[0045] The electronic ink screen 20 includes a counter substrate 21, a second array substrate 22 disposed opposite to the counter substrate 21, and ink capsules 23 located between the counter substrate 21 and the second array substrate 22. The counter substrate 21 is on the side of the electronic ink screen 20 close to the bistable liquid crystal cell 10, and the second array substrate 22 is on the side of the electronic ink screen 20 far from the bistable liquid crystal cell 10. In all the ink capsules 23, there are black ink particles 231 and white ink particles 232 with opposite polarities. By providing electric fields in different directions to the ink capsules 23, the black ink particles 231 and the white ink particles 232 can move towards the corresponding directions. For example, the black ink particles 231 are negatively charged and the white ink particles 232 are positively charged, so that the white ink particles 232 move towards the direction of the electric field and the black ink particles 231 move towards the opposite direction of the electric field. If an upward electric field is provided, the white ink particles 232 move upward and the black ink particles 231 move downward; if a downward electric field is provided, the white ink particles 232 move downward and the black ink particles 231 move upward. Of course, it can also be that the black ink particles 231 are positively charged and the white ink particles 232 are negatively charged, so that the black ink particles 231 move towards the direction of the electric field and the white ink particles 232 move towards the opposite direction of the electric field.

[0046] On the second array substrate 22, there are second pixel electrodes 221 corresponding to the second pixel units P2 one by one, and on the counter substrate 21, there is a second common electrode 211 cooperating with the second pixel electrodes 221. The second pixel electrodes 221 are block electrodes corresponding to the second pixel units P2, and the second common electrode 211 is a planar electrode covering the entire counter substrate 21. By controlling the voltage polarity on the second pixel electrodes 221, the direction of the electric field between the second pixel electrodes 221 and the second common electrode 211 is controlled, so as to control the switching of the ink capsules 23 between the black state (light absorption state) and the second color state. For example, a 0V common voltage is applied to the second common electrode 211. If a positive-polarity voltage is applied to the second pixel electrodes 221, the direction of the electric field between the second pixel electrodes 221 and the second common electrode 211 is upward; if a negative-polarity voltage is applied to the second pixel electrodes 221, the direction of the electric field between the second pixel electrodes 221 and the second common electrode 211 is downward.

[0047] As Figure 3As shown, a plurality of second scanning lines 201, a plurality of second data lines 202, and a plurality of second thin film transistors 203 are provided on the second array substrate 22. The second array substrate 22 is provided with a second pixel electrode 221 and a second thin film transistor 203 in the area corresponding to each second pixel unit P2. The second pixel electrode 221 is electrically connected to the second scanning line 201 and the second data line 202 adjacent to the second thin film transistor 203 through the second thin film transistor 203. Among them, the second thin film transistor 203 includes a second gate, a second active layer, a second drain, and a second source. The second gate is located on the same layer as the second scanning line 201 and is electrically connected. The second gate and the second active layer are separated by an insulating layer. The second source is electrically connected to the second data line 202, and the second drain is electrically connected to the second pixel electrode 221 through a contact hole.

[0048] Among them, the color filter substrate 11, the first array substrate 12, the counter substrate 21, and the second array substrate 22 can be made of transparent substrates such as glass, acrylic, and polycarbonate. The materials of the first common electrode 111, the first pixel electrode 121, the second common electrode 211, and the second pixel electrode 221 can be made of transparent electrodes such as indium tin oxide (ITO) or indium zinc oxide (IZO). A conductive structure (such as a gold ball) can be provided between the color filter substrate 11 and the first array substrate 12, and between the counter substrate 21 and the second array substrate 22. The first common electrode 111 is electrically connected to the first array substrate 12 through the conductive structure, and the second common electrode 211 is electrically connected to the second array substrate 22 through the conductive structure.

[0049] In this embodiment, a driving method for a color electronic paper display is also provided for driving the color electronic paper display as described above. Taking the black ink particles 231 being negatively charged and the white ink particles 232 being positively charged as an example, the driving method includes: When the pixel is in the bright state, controlling the bistable liquid crystal layer 13 in the corresponding area of the pixel to be in the reflective state and reflect light of the first color, and controlling the black ink particles 231 in the ink capsule 23 in the corresponding area of the pixel to concentrate on the side close to the second common electrode 211; or, controlling the bistable liquid crystal layer 13 in the corresponding area of the pixel to be in the fog state or the light-transmitting state, and controlling the white ink particles 232 in the ink capsule 23 in the corresponding area of the pixel to concentrate on the side close to the second common electrode 211; or, controlling the bistable liquid crystal layer 13 in the corresponding area of the pixel to be in the reflective state and reflect light of the first color, and controlling the white ink particles 232 in the ink capsule 23 in the corresponding area of the pixel to concentrate on the side close to the second common electrode 211.

[0050] When the pixel is in the dark state, the bistable liquid crystal layer 13 corresponding to the pixel area is controlled to be in a fog state or a transparent state, and the black ink particles 231 in the ink capsule 23 corresponding to the pixel area are controlled to concentrate on the side close to the second common electrode 211.

[0051] Figure 6 It is one of the schematic structural diagrams of the color electronic paper display in the bright state in the first embodiment of the present invention. Figure 7 It is the second of the schematic structural diagrams of the color electronic paper display in the bright state in the first embodiment of the present invention. Figure 8 It is the third of the schematic structural diagrams of the color electronic paper display in the bright state in the first embodiment of the present invention. Figure 9 It is the fourth of the schematic structural diagrams of the color electronic paper display in the bright state in the first embodiment of the present invention. Figure 10 It is the fifth of the schematic structural diagrams of the color electronic paper display in the bright state in the first embodiment of the present invention. Figure 11 It is the schematic structural diagram of the color electronic paper display in the black state in the first embodiment of the present invention. As Figures 6 to 11 shown, in this embodiment, the first color is taken as cyan for example: As Figure 6 , Figure 8 and Figure 9 shown, when the red pixel unit is in the bright state, the bistable liquid crystal layer 13 corresponding to the red pixel unit area is controlled to be in a fog state, a light-transmitting state or a reflective state, and the white ink particles 232 in the ink capsule 23 corresponding to the red pixel unit area are controlled to concentrate on the side close to the second common electrode 211. As Figure 11 shown, when the red pixel unit is in the dark state, the bistable liquid crystal layer 13 corresponding to the red pixel unit area is controlled to be in a fog state, a light-transmitting state or a reflective state, and the black ink particles 231 in the ink capsule 23 corresponding to the pixel area are controlled to concentrate on the side close to the second common electrode 211. Since the bistable liquid crystal layer 13 does not reflect red light in the reflective state, the bright state and the dark state of the red pixel unit are controlled by the electronic ink screen 20. As Figure 7 and Figure 10 shown, when the red pixel unit is in grayscale display, it is controlled by the electronic ink screen 20, and by controlling the driving waveform on the second pixel electrode 221 corresponding to the red pixel unit, the distribution ratio of the black ink particles 231 and the white ink particles 232 in the ink capsule 23 corresponding to the red pixel unit on the side of the second common electrode 211 is controlled.

[0052] When the blue / green pixel unit is in the bright state, as Figure 6 shown, the bistable liquid crystal layer 13 corresponding to the blue / green pixel unit area is controlled to be in a reflective state and reflect the light of the first color, and the white ink particles 232 in the ink capsule 23 corresponding to the blue / green pixel unit area are controlled to concentrate on the side close to the second common electrode 211; or, asFigure 8 As shown, when the blue / green pixel unit is in the bright state, the bistable liquid crystal layer 13 in the corresponding area of the blue / green pixel unit is in the reflective state and reflects light of the first color, and the black ink particles 231 in the ink capsules 23 in the corresponding area of the blue / green pixel unit are concentrated on the side close to the second common electrode 211; or, as Figure 9 shown, the bistable liquid crystal layer 13 in the corresponding area of the blue / green pixel unit is controlled to be in the mist state or the light-transmitting state, and the white ink particles 232 in the ink capsules 23 in the corresponding area of the blue / green pixel unit are concentrated on the side close to the second common electrode 211. As Figure 7 and Figure 10 shown, when the blue / green pixel unit is in grayscale display, it can be controlled separately by the electronic ink screen 20, or separately by the bistable liquid crystal cell 10, or jointly by the bistable liquid crystal cell 10 and the electronic ink screen 20 to achieve a high number of gray levels and a high color gamut display. Among them, the bistable liquid crystal cell 10 controls the driving waveform on the corresponding first pixel electrode 121 of the blue / green pixel unit to control the light reflectance of the bistable liquid crystal layer 13 corresponding to the blue / green pixel unit, thereby realizing the gray level control of the first pixel unit P1. The electronic ink screen 20 controls the driving waveform on the corresponding second pixel electrode 221 of the blue / green pixel unit to control the distribution ratio of the black ink particles 231 and the white ink particles 232 in the ink capsules 23 corresponding to the blue / green pixel unit on the side of the second common electrode 211, thereby realizing the gray level control of the second pixel unit P2.

[0053] Among them, as Figures 9 to 11 shown, when the bistable liquid crystal layer 13 in the corresponding area of the blue / green pixel unit is in the mist state or the light-transmitting state, the light transmittance is denoted as c%, the light reflectance of the ink capsule 23 is denoted as d%, the light transmittance of the color resist layer 113 is denoted as a%, and the ambient light is denoted as 1, then the reflected brightness A of the blue / green pixel unit = 1×a%×c%×d%×c%×a%=(a%) 2 ×(c%) 2 ×d%, and as the electronic ink screen 20 changes from white to black, the reflectance decreases accordingly, and the brightness changes from high to low. As Figures 6 to 8 shown, when the bistable liquid crystal layer 13 in the corresponding area of the blue / green pixel unit is in the reflective state, the light transmittance is denoted as c%, the light reflectance is denoted as b%, the light reflectance of the ink capsule 23 is denoted as d%, the light transmittance of the color resist layer 113 is denoted as a%, and the ambient light is denoted as 1, then the reflected brightness A of the blue / green pixel unit = 1×a%×b%×a%+1×a%×(1 - b%)×c%×d%×c%×a%=(a%) 2 ×b%+(c%) 2 ×(a%) 2×d%×(1 - b%), the brightness is jointly controlled by the bistable liquid crystal cell 10 and the electronic ink screen 20.

[0054] When the color electronic paper display shows a color picture, the first pixel units P1 and the second pixel units P2 corresponding to the red sub-pixels, green sub-pixels, and blue sub-pixels respectively achieve the corresponding gray-scale brightness. Through the principle of color mixing of red, green, and blue light, various colors of light are formed to achieve color display. Among them, the number of gray scales that the bistable liquid crystal cell 10 can control is 2 5 , and the number of gray scales that the electronic ink screen 20 can control is 2 4 , therefore, after the bistable liquid crystal cell 10 and the electronic ink screen 20 are combined with each other, the minimum number of colors that can be achieved is 2 4 ×2 5 ×2 5 = 16384 colors, which is higher than the number of colors that can be achieved by existing color EPDs. When displaying in a high color gamut, the blue / green pixel units can achieve 2 4 ×2 5 gray-scale brightness levels. Therefore, the maximum number of colors that can be achieved is 2 4 ×2 4 ×2 5 ×2 4 ×2 5 = 4194304 colors, which is much higher than the number of colors that can be achieved by existing color EPDs.

[0055] [Embodiment 2] Figure 12 is a schematic structural diagram of the color electronic paper display in the initial state in Embodiment 2 of the present invention. Figure 13 is a schematic plan view of the first array substrate in Embodiment 2 of the present invention. Figure 14 is a schematic plan view of the second array substrate in Embodiment 2 of the present invention. As Figures 12 to 14 shown, the color electronic paper display and the driving method provided in Embodiment 2 of the present invention are basically the same as those in Embodiment 1 ( Figures 1 to 11 ), and the difference lies in: In this embodiment, the first pixel electrode 121 includes independent first sub-pixel electrode blocks 121a and second sub-pixel electrode blocks 121b, and the second pixel electrode 221 includes independent third sub-pixel electrode blocks 221a and fourth sub-pixel electrode blocks 221b. Thus, the first pixel units P1 and the second pixel units P2 can control more gray-scale brightness levels. The number of gray scales that the bistable liquid crystal cell 10 can control is 2 6 , and the number of gray scales that the electronic ink screen 20 can control is 2 5, compared with the first embodiment, the number of gray levels is greatly increased, and the color gamut of the display screen is increased. Of course, in other embodiments, it may also be that the first pixel electrode 121 includes independent first sub-pixel electrode blocks 121a and second sub-pixel electrode blocks 121b, or the second pixel electrode 221 includes independent third sub-pixel electrode blocks 221a and fourth sub-pixel electrode blocks 221b.

[0056] As Figure 13 shown, a plurality of first scan lines 101, a plurality of first data lines 102, and a plurality of first thin film transistors 103 are provided on the first array substrate 12. The first array substrate 12 is provided with a first pixel electrode 121 and two first thin film transistors 103 in the area corresponding to each first pixel unit P1. The first sub-pixel electrode block 121a and the second sub-pixel electrode block 121b are each electrically connected to the first scan line 101 and the first data line 102 adjacent to the first thin film transistor 103 through a first thin film transistor 103. Among them, the first thin film transistor 103 includes a first gate, a first active layer, a first drain, and a first source. The first gate and the first scan line 101 are located on the same layer and are electrically connected. The first gate and the first active layer are separated by an insulating layer. The first source is electrically connected to the first data line 102, and the first drain is electrically connected to the first pixel electrode 121 through a contact hole.

[0057] As Figure 14 shown, a plurality of second scan lines 201, a plurality of second data lines 202, and a plurality of second thin film transistors 203 are provided on the second array substrate 22. The second array substrate 22 is provided with a second pixel electrode 221 and two second thin film transistors 203 in the area corresponding to each second pixel unit P2. The third sub-pixel electrode block 221a and the fourth sub-pixel electrode block 221b are each electrically connected to the second scan line 201 and the second data line 202 adjacent to the second thin film transistor 203 through a second thin film transistor 203. The third sub-pixel electrode block 221a and the fourth sub-pixel electrode block 221b are made independent of each other and corresponding voltages are applied separately through the second scan line 201, the second data line 202, and the second thin film transistor 203. Among them, the second thin film transistor 203 includes a second gate, a second active layer, a second drain, and a second source. The second gate and the second scan line 201 are located on the same layer and are electrically connected. The second gate and the second active layer are separated by an insulating layer. The second source is electrically connected to the second data line 202, and the second drain is electrically connected to the second pixel electrode 221 through a contact hole.

[0058] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of the first embodiment, and will not be described here again.

[0059] [Embodiment Three] Figure 15 This is a schematic structural diagram of the color electronic paper display in the initial state in Embodiment 3 of the present invention. As Figure 15 shown, the color electronic paper display and the driving method provided in Embodiment 3 of the present invention are basically the same as those in Embodiment 1 ( Figures 1 to 11 ), Embodiment 2 ( Figures 12 to 14 )) of the color electronic paper display and the driving method. The difference lies in that: In this embodiment, the first color is yellow, that is, the first color is the complementary color of blue, and all the bistable liquid crystal layers 13 reflect yellow light in the reflective state.

[0060] In this embodiment, a driving method for a color electronic paper display is also provided, which is used to drive the color electronic paper display as described above. Taking the case where the black ink particles 231 are negatively charged and the white ink particles 232 are positively charged as an example, the driving method includes: When the blue pixel unit is in the bright state, control the bistable liquid crystal layer 13 in the corresponding area of the blue pixel unit to be in the fog state, the light-transmitting state or the reflective state, and control the white ink particles 232 in the ink capsule 23 in the corresponding area of the blue pixel unit to concentrate on the side close to the second common electrode 211. When the blue pixel unit is in the dark state, control the bistable liquid crystal layer 13 in the corresponding area of the blue pixel unit to be in the fog state, the light-transmitting state or the reflective state, and control the black ink particles 231 in the ink capsule 23 in the corresponding area of the pixel to concentrate on the side close to the second common electrode 211. Since the bistable liquid crystal layer 13 does not reflect blue light in the reflective state, therefore, the bright state and the dark state of the blue pixel unit are controlled by the electronic ink screen 20. When the blue pixel unit is in grayscale display, it is controlled by the electronic ink screen 20, and by controlling the driving waveform on the corresponding second pixel electrode 221 of the blue pixel unit, to control the distribution ratio of the black ink particles 231 and the white ink particles 232 in the ink capsule 23 corresponding to the blue pixel unit on the side of the second common electrode 211.

[0061] When the red / green pixel unit is in the bright state, it controls the bistable liquid crystal layer 13 in the corresponding area of the red / green pixel unit to be in the reflective state and reflect light of the first color, and controls the white ink particles 232 in the ink capsule 23 in the corresponding area of the red / green pixel unit to concentrate on the side close to the second common electrode 211; or, when the red / green pixel unit is in the bright state, it controls the bistable liquid crystal layer 13 in the corresponding area of the red / green pixel unit to be in the reflective state and reflect light of the first color, and controls the black ink particles 231 in the ink capsule 23 in the corresponding area of the red / green pixel unit to concentrate on the side close to the second common electrode 211; or, it controls the bistable liquid crystal layer 13 in the corresponding area of the red / green pixel unit to be in the fog state or the light-transmitting state, and controls the white ink particles 232 in the ink capsule 23 in the corresponding area of the red / green pixel unit to concentrate on the side close to the second common electrode 211. When the red / green pixel unit is in grayscale display, it can be controlled separately by the electronic ink screen 20, or separately by the bistable liquid crystal cell 10, or jointly by the bistable liquid crystal cell 10 and the electronic ink screen 20 to achieve a high number of grayscales and a high color gamut display. Among them, the bistable liquid crystal cell 10 controls the driving waveform on the first pixel electrode 121 corresponding to the red / green pixel unit to control the light reflectivity of the bistable liquid crystal layer 13 corresponding to the red / green pixel unit, thereby realizing the grayscale control of the first pixel unit P1. The electronic ink screen 20 controls the driving waveform on the second pixel electrode 221 corresponding to the red / green pixel unit to control the distribution ratio of the black ink particles 231 and the white ink particles 232 in the ink capsule 23 corresponding to the red / green pixel unit on the side of the second common electrode 211, thereby realizing the grayscale control of the second pixel unit P2.

[0062] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be described in detail here.

[0063] [Embodiment 4] Figure 16 is a schematic structural diagram of the color electronic paper display in the initial state in Embodiment 4 of the present invention. As Figure 16 shown, the color electronic paper display and the driving method provided in Embodiment 4 of the present invention are basically the same as those of Embodiment 1 ( Figures 1 to 11 ), Embodiment 2 ( Figures 12 to 14 ), and the differences are as follows: In this embodiment, the first color is magenta, that is, the first color is the complementary color of green, and all the bistable liquid crystal layers 13 reflect magenta light in the reflective state.

[0064] In this embodiment, a driving method for a color electronic paper display is also provided for driving the color electronic paper display as described above. Taking the case where the black ink particles 231 are negatively charged and the white ink particles 232 are positively charged as an example, the driving method includes: When the green pixel unit is in the bright state, the bistable liquid crystal layer 13 in the corresponding area of the green pixel unit is controlled to be in the fog state, the light-transmitting state or the reflective state, and the white ink particles 232 in the ink capsule 23 in the corresponding area of the green pixel unit are controlled to concentrate on the side close to the second common electrode 211. When the green pixel unit is in the dark state, the bistable liquid crystal layer 13 in the corresponding area of the green pixel unit is controlled to be in the fog state, the light-transmitting state or the reflective state, and the black ink particles 231 in the ink capsule 23 in the corresponding area of the pixel are controlled to concentrate on the side close to the second common electrode 211. Since the bistable liquid crystal layer 13 does not reflect green light in the reflective state, the bright state and the dark state of the green pixel unit are controlled by the electronic ink screen 20. When the green pixel unit performs grayscale display, it is controlled by the electronic ink screen 20. By controlling the driving waveform on the corresponding second pixel electrode 221 of the green pixel unit, the distribution ratio of the black ink particles 231 and the white ink particles 232 in the ink capsule 23 corresponding to the green pixel unit on the side of the second common electrode 211 is controlled.

[0065] When the red / blue pixel unit is in the bright state, it controls the bistable liquid crystal layer 13 in the corresponding area of the red / blue pixel unit to be in the reflective state and reflect light of the first color, and controls the white ink particles 232 in the ink capsules 23 in the corresponding area of the red / blue pixel unit to concentrate on the side close to the second common electrode 211; or, when the red / blue pixel unit is in the bright state, it controls the bistable liquid crystal layer 13 in the corresponding area of the red / blue pixel unit to be in the reflective state and reflect light of the first color, and controls the black ink particles 231 in the ink capsules 23 in the corresponding area of the red / blue pixel unit to concentrate on the side close to the second common electrode 211; or, it controls the bistable liquid crystal layer 13 in the corresponding area of the red / blue pixel unit to be in the fog state or the light-transmitting state, and controls the white ink particles 232 in the ink capsules 23 in the corresponding area of the red / blue pixel unit to concentrate on the side close to the second common electrode 211. When the red / blue pixel unit is in grayscale display, it can be controlled separately by the electronic ink screen 20, or separately by the bistable liquid crystal cell 10, or jointly controlled by the bistable liquid crystal cell 10 and the electronic ink screen 20 to achieve a high number of gray levels and a high color gamut display. Among them, the bistable liquid crystal cell 10 controls the driving waveform on the corresponding first pixel electrode 121 of the red / blue pixel unit to control the light reflectance of the bistable liquid crystal layer 13 corresponding to the red / blue pixel unit, thereby realizing the gray level control of the first pixel unit P1. The electronic ink screen 20 controls the driving waveform on the corresponding second pixel electrode 221 of the red / blue pixel unit to control the distribution ratio of the black ink particles 231 and the white ink particles 232 in the ink capsules 23 corresponding to the red / blue pixel unit on the side of the second common electrode 211, thereby realizing the gray level control of the second pixel unit P2.

[0066] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be elaborated here.

[0067] [Embodiment 5] Figure 17 is a schematic structural diagram of the color electronic paper display in the initial state in Embodiment 5 of the present invention. As Figure 17 shown, the color electronic paper display and the driving method provided in Embodiment 5 of the present invention are basically the same as those in Embodiment 1 ( Figures 1 to 11 ), Embodiment 2 ( Figures 12 to 14 ). The differences are as follows: In this embodiment, the first color is white, that is, all the bistable liquid crystal layers 13 reflect white light in the reflective state. Of course, in other embodiments, all the bistable liquid crystal layers 13 can also reflect non-visible light in the reflective state, with a wavelength range <400nm or >800nm, such as infrared light or ultraviolet light.

[0068] In this embodiment, a driving method for a color electronic paper display is further provided for driving the color electronic paper display as described above. Taking the black ink particles 231 being negatively charged and the white ink particles 232 being positively charged as an example, the driving method includes: For the red / green / blue pixel units, controlling the bistable liquid crystal layer 13 in the corresponding area of the red / green / blue pixel units to be in a reflective state and reflect light of the first color, and controlling the white ink particles 232 in the ink capsules 23 in the corresponding area of the red / green / blue pixel units to concentrate on the side close to the second common electrode 211; or, when the red / green / blue pixel units are in the bright state, controlling the bistable liquid crystal layer 13 in the corresponding area of the red / green / blue pixel units to be in a reflective state and reflect light of the first color, and controlling the black ink particles 231 in the ink capsules 23 in the corresponding area of the red / green / blue pixel units to concentrate on the side close to the second common electrode 211; or, controlling the bistable liquid crystal layer 13 in the corresponding area of the red / green / blue pixel units to be in a fog state or a light-transmitting state, and controlling the white ink particles 232 in the ink capsules 23 in the corresponding area of the red / green / blue pixel units to concentrate on the side close to the second common electrode 211. When the red / green / blue pixel units are in grayscale display, they can be controlled separately by the electronic ink screen 20, or separately by the bistable liquid crystal cell 10, or jointly by the bistable liquid crystal cell 10 and the electronic ink screen 20 to achieve a high number of gray levels and a high color gamut display. Among them, the bistable liquid crystal cell 10 controls the driving waveform on the corresponding first pixel electrode 121 of the red / green / blue pixel units to control the light reflectivity of the bistable liquid crystal layer 13 corresponding to the red / green / blue pixel units, thereby achieving gray level control of the first pixel unit P1. The electronic ink screen 20 controls the driving waveform on the corresponding second pixel electrode 221 of the red / green / blue pixel units to control the distribution ratio of the black ink particles 231 and the white ink particles 232 in the ink capsules 23 corresponding to the red / green / blue pixel units on the side of the second common electrode 211, thereby achieving gray level control of the second pixel unit P2.

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

[0070] [Embodiment 6] Figure 18 is a schematic structural diagram of the color electronic paper display in the initial state in Embodiment 6 of the present invention. As Figure 18 shown, the color electronic paper display and the driving method provided in Embodiment 6 of the present invention are the same as those in Embodiment 1 ( Figures 1 to 11 ), Embodiment 2 ( Figures 12 to 14 ), Embodiment 3 ( Figure 15 ), Embodiment 4 (Figure 16 ) Example Five Figure 17 ) The color electronic paper display and driving method in In this embodiment, among multiple first pixel units P1, there are white pixel units, and the color filter substrate 11 is in a transparent state in the area corresponding to the white pixel units. Among them, a column of green pixel units, a column of blue pixel units, a column of red pixel units, and a column of white pixel units are alternately arranged in sequence along the row direction.

[0071] This embodiment also provides a driving method for a color electronic paper display, which is used to drive the color electronic paper display as described above. Hereinafter, an example in which the black ink particles 231 are negatively charged and the white ink particles 232 are positively charged will be used for illustration. The driving method includes: When the white pixel unit is in the bright state, control the bistable liquid crystal layer 13 in the area corresponding to the white pixel unit to be in the fog state or the light-transmitting state, and control the white ink particles 232 in the ink capsules 23 in the area corresponding to the white pixel unit to concentrate on the side close to the second common electrode 211.

[0072] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment One, Embodiment Two, Embodiment Three, Embodiment Four, and Embodiment Five, and will not be elaborated here.

[0073] Figure 19 is a schematic diagram of the circuit control structure of the color electronic paper display of the present invention. As Figure 19 shown, in the present application, the color electronic paper display has a control unit, a driving voltage generator, a first driving chip, and a second driving chip. The control unit is used to control the driving voltage generator to generate the corresponding driving voltages in the bistable liquid crystal cell 10 and the electronic ink screen 20. The first driving chip transmits the first driving voltage in the driving voltage to the bistable liquid crystal cell 10, and the second driving chip transmits the second driving voltage in the driving voltage to the electronic ink screen 20, so that the bistable liquid crystal cell 10 and the electronic ink screen 20 respectively control the gray-scale brightness of their displays.

[0074] In this article, the orientation words such as up, down, left, right, front, and back are defined based on the positions of the structures in the drawings and the positions relative to each other, only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the orientation words should not limit the scope of protection requested by the present application. It should also be understood that the terms "first" and "second" used in this article are only for distinction in name and do not limit the quantity and order.

[0075] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications using the above-disclosed technical content within the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A color electronic paper display, characterized in that, It includes a bistable liquid crystal cell (10) and an electronic ink screen (20) laminated on the lower side of the bistable liquid crystal cell (10). The bistable liquid crystal cell (10) has a plurality of first pixel units (P1) distributed in an array, and the electronic ink screen (20) has second pixel units (P2) corresponding to the first pixel units (P1) one by one; The bistable liquid crystal cell (10) includes a color filter substrate (11), a first array substrate (12) disposed opposite to the color filter substrate (11), and a bistable liquid crystal layer (13) located between the color filter substrate (11) and the first array substrate (12). The bistable liquid crystal layer (13) reflects light of a first color in the reflective state. A first pixel electrode (121) corresponding to the first pixel unit (P1) one by one is provided on the first array substrate (12), a color filter layer (113) corresponding to the first pixel unit (P1) and a first common electrode (111) cooperating with the first pixel electrode (121) are provided on the color filter substrate (11); The electronic ink screen (20) includes a counter substrate (21), a second array substrate (22) disposed opposite to the counter substrate (21), and ink capsules (23) located between the counter substrate (21) and the second array substrate (22). Oppositely polarized black ink particles (231) and white ink particles (232) are provided in all the ink capsules (23). A second pixel electrode (221) corresponding to the second pixel unit (P2) one by one is provided on the second array substrate (22), and a second common electrode (211) cooperating with the second pixel electrode (221) is provided on the counter substrate (21).

2. The color electronic paper display according to claim 1, characterized in that, Among the plurality of first pixel units (P1), there are red pixel units, green pixel units, and blue pixel units. The color filter layer (113) includes a red color filter layer (113a), a green color filter layer (113b), and a blue color filter layer (113c). The red color filter layer (113a) corresponds to the red pixel unit, the green color filter layer (113b) corresponds to the green pixel unit, and the blue color filter layer (113c) corresponds to the blue pixel unit.

3. The color electronic paper display according to claim 2, characterized in that, The first color is cyan, yellow, magenta, or white.

4. The color electronic paper display according to claim 2, wherein, Among the plurality of first pixel units (P1), there are white pixel units, and the color filter substrate (11) is in a transparent state in the area corresponding to the white pixel units.

5. The color electronic paper display according to claim 2, wherein A black matrix (112) is provided on the color filter substrate (11), and the black matrix (112) separates the plurality of first pixel units (P1) from each other.

6. The color electronic paper display according to any one of claims 1-5, characterized in that, The first pixel electrode (121) includes independent first sub-pixel electrode blocks (121a) and second sub-pixel electrode blocks (121b).

7. The color electronic paper display according to any one of claims 1-5, characterized in that, The second pixel electrode (221) includes independent third sub-pixel electrode blocks (221a) and fourth sub-pixel electrode blocks (221b).

8. A driving method for a color electronic paper display, characterized in that, For driving a color electronic paper display as described in any one of claims 1-7, the driving method includes: When the pixel is in the dark state, controlling the bistable liquid crystal layer (13) in the corresponding area of the pixel to be in a fog state or a transparent state, and controlling the black ink particles (231) in the ink capsule (23) in the corresponding area of the pixel to concentrate on the side close to the second common electrode (211); When the pixel is in the bright state, controlling the bistable liquid crystal layer (13) in the corresponding area of the pixel to be in a reflective state and reflect light of a first color, and controlling the black ink particles (231) in the ink capsule (23) in the corresponding area of the pixel to concentrate on the side close to the second common electrode (211); or, controlling the bistable liquid crystal layer (13) in the corresponding area of the pixel to be in a fog state or a light-transmitting state, and controlling the white ink particles (232) in the ink capsule (23) in the corresponding area of the pixel to concentrate on the side close to the second common electrode (211); or, controlling the bistable liquid crystal layer (13) in the corresponding area of the pixel to be in a reflective state and reflect light of a first color, and controlling the white ink particles (232) in the ink capsule (23) in the corresponding area of the pixel to concentrate on the side close to the second common electrode (211).

9. The driving method of the color electronic paper display according to claim 8, characterized in that, Among multiple first pixel units (P1), there are red pixel units, green pixel units, and blue pixel units. The color resist layer (113) includes a red color resist layer (113a), a green color resist layer (113b), and a blue color resist layer (113c). The red color resist layer (113a) corresponds to the red pixel unit, the green color resist layer (113b) corresponds to the green pixel unit, and the blue color resist layer (113c) corresponds to the blue pixel unit. The driving method includes: When the first color is cyan, when the red pixel unit is in the bright state, controlling the bistable liquid crystal layer (13) in the corresponding area of the red pixel unit to be in a fog state, a light-transmitting state, or a reflective state, and controlling the white ink particles (232) in the ink capsule (23) in the corresponding area of the red pixel unit to concentrate on the side close to the second common electrode (211); Or, when the first color is yellow, when the blue pixel unit is in the bright state, controlling the bistable liquid crystal layer (13) in the corresponding area of the blue pixel unit to be in a fog state, a light-transmitting state, or a reflective state, and controlling the white ink particles (232) in the ink capsule (23) in the corresponding area of the blue pixel unit to concentrate on the side close to the second common electrode (211); Or, when the first color is magenta, when the green pixel unit is in the bright state, controlling the bistable liquid crystal layer (13) in the corresponding area of the green pixel unit to be in a fog state, a light-transmitting state, or a reflective state, and controlling the white ink particles (232) in the ink capsule (23) in the corresponding area of the green pixel unit to concentrate on the side close to the second common electrode (211).

10. The driving method of the color electronic paper display according to claim 8, wherein Among the multiple first pixel units (P1), there are white pixel units. The color filter substrate (11) is in a transparent state in the area corresponding to the white pixel units. The driving method includes: When the white pixel unit is in the bright state, controlling the bistable liquid crystal layer (13) in the area corresponding to the white pixel unit to be in a fog state or a light-transmitting state, and controlling the white ink particles (232) in the ink capsules (23) in the area corresponding to the white pixel unit to concentrate on the side close to the second common electrode (211).

Images