Electronic paper display panel, driving method thereof and display device

Abstract

The invention discloses an electronic paper display panel, a driving method thereof and a display device, and mainly relates to the technical field of display, a first pixel unit comprises a first upper driving electrode, a first electrophoresis accommodating cavity and a first lower driving electrode, and the first upper driving electrode and the first lower driving electrode are arranged on the two sides of the first electrophoresis accommodating cavity respectively; the first pixel unit further comprises first light absorbing particles, second light absorbing particles and first light reflecting particles which are arranged in the first electrophoresis accommodating cavity; the charge quantity of the first light absorbing particles, the charge quantity of the first light reflecting particles and the charge quantity of the second light absorbing particles are sequentially reduced, the polarities of the first light absorbing particles and the second light absorbing particles are the same, and the polarities of the first light absorbing particles and the first light reflecting particles are opposite. Therefore, the electronic paper display panel can be switched between double-sided display and single-sided display, and the image resolution during single-sided display is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to an electronic paper display panel, a driving method thereof and a display device. BACKGROUND

[0002] With the increasing demand for reading quality, the technology of electronic paper display panel has been rapidly developed, and many novel electronic paper display panels have been continuously developed. Compared with ordinary paper reading, electronic paper display panel reading can greatly save ecological resources, and has many advantages such as low power consumption, thinness, long service life, and flexibility.

[0003] However, the current electronic paper display panel cannot meet the demand of switching between single-sided display and double-sided display. SUMMARY

[0004] The purpose of the present application is to provide an electronic paper display panel, a driving method thereof and a display device, so that the electronic paper display panel can switch between double-sided display and single-sided display, and the picture resolution when displaying on one side is improved.

[0005] The present application discloses an electronic paper display panel, which further comprises a first substrate, a plurality of first pixel units, a plurality of second pixel units and a second substrate, the first pixel units and the second pixel units are located between the first substrate and the second substrate, the plurality of first pixel units and the plurality of second pixel units are arranged in a matrix, and the plurality of first pixel units and the plurality of second pixel units are arranged at intervals. The first pixel unit comprises a first upper driving electrode, a first electrophoretic containing cavity and a first lower driving electrode, the first upper driving electrode and the first lower driving electrode are respectively arranged on both sides of the first electrophoretic containing cavity, and the first pixel unit further comprises first light-absorbing particles, second light-absorbing particles and first light-reflecting particles arranged in the first electrophoretic containing cavity. The charge amount of the first light-absorbing particles, the charge amount of the first light-reflecting particles and the charge amount of the second light-absorbing particles decrease in turn, the polarity of the first light-absorbing particles is the same as that of the second light-absorbing particles, and the polarity of the first light-absorbing particles is opposite to that of the first light-reflecting particles.

[0006] Optionally, the second pixel unit comprises a second upper driving electrode, a second electrophoretic containing cavity and a second lower driving electrode, the second upper driving electrode and the second lower driving electrode are respectively arranged on both sides of the second electrophoretic containing cavity, and the second pixel unit further comprises third light-absorbing particles, fourth light-absorbing particles and second light-reflecting particles arranged in the second electrophoretic containing cavity. The charge amount of the third light-absorbing particle, the charge amount of the second light-reflecting particle, and the charge amount of the fourth light-absorbing particle decrease in turn, the third light-absorbing particle and the fourth light-absorbing particle have the same polarity, and the third light-absorbing particle and the second light-reflecting particle have opposite polarities.

[0007] Optionally, the electronic paper display panel further comprises a light shielding layer, the light shielding layer is arranged on the first substrate, and a projection of the light shielding layer on the first substrate covers a projection of the second pixel unit on the first substrate. The second pixel unit comprises a second upper driving electrode, a second electrophoretic containing cavity, and a second lower driving electrode, the second upper driving electrode and the second lower driving electrode are arranged on two sides of the second electrophoretic containing cavity respectively, the second pixel unit further comprises a multi-stable liquid crystal arranged in the second electrophoretic containing cavity, and a side of the second substrate away from the first substrate is a side of a display surface of the second pixel unit.

[0008] Optionally, the electronic paper display panel further comprises a first driving unit, a second driving unit, a third driving unit, and a fourth driving unit. The first driving unit is connected with the first upper driving electrode, the second driving unit is connected with the first lower driving electrode, the third driving unit is connected with the second upper driving electrode, and the fourth driving unit is connected with the second lower driving electrode. The second driving unit, the fourth driving unit, the first lower driving electrode, and the second lower driving electrode are arranged on the first substrate; the first driving unit, the third driving unit, the first upper driving electrode, and the second upper driving electrode are arranged on the second substrate. The second driving unit and the fourth driving unit are located in a projection of the light shielding layer on the first substrate, and the first driving unit and the third driving unit are located in a projection of the first pixel unit on the second substrate.

[0009] Optionally, the electronic paper display panel further comprises a magnetic layer, the magnetic layer is arranged on the second substrate, and the magnetic layer is located between the first pixel unit and the second substrate, and the second light-absorbing particle has magnetism.

[0010] Optionally, the magnetic layer is located on a side of the first lower driving electrode facing the first upper driving electrode, and a material of the magnetic layer comprises a carbon-based magnetic material.

[0011] Optionally, the first substrate is defined as a first direction towards the second substrate, the width of the first electrophoretic containing cavity gradually decreases along the first direction, and the width of the second electrophoretic containing cavity gradually increases along the first direction.

[0012] Optionally, the number of the second light-absorbing particles is less than the number of the first light-absorbing particles, and the number of the second light-absorbing particles is less than the number of the first light-reflecting particles.

[0013] The application further discloses a control method of the electronic paper display panel, which is used for controlling the electronic paper display panel and includes the following steps. When the display surfaces of the first pixel unit and the second pixel unit are switched to different sides, the first upper driving electrode and the first lower driving electrode are used to drive the second light-absorbing particles to be located at the side of the first light-reflecting particles close to the display surface of the second pixel unit.

[0014] The application further discloses a display device, which includes a driving circuit and an electronic paper display panel.

[0015] Compared with the prior art, the application sets the first pixel unit and the second pixel unit between the first substrate and the second substrate, sets the first light-absorbing particles, the second light-absorbing particles and the first light-reflecting particles in the first electrophoretic containing cavity of the first pixel unit, and sequentially reduces the charge amount of the first light-absorbing particles, the charge amount of the first light-reflecting particles and the charge amount of the second light-absorbing particles, so that the first upper control electrode and the first lower control electrode can control the second light-absorbing particles to be located at the side of the first light-reflecting particles close to the display surface of the second pixel unit, the electronic paper display panel can realize the switching between the double-side display and the single-side display, and the applicability of the electronic paper display panel is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is to be understood that the drawings are solely for purposes of illustration and that they are not limiting of the application. In the drawings: Figure 1 is a schematic diagram of a display device according to an embodiment of the present application; Figure 2 is a schematic diagram of a first pixel unit absorbing light when the display surfaces of the first pixel unit and a second pixel unit are on different sides in an electronic paper display panel according to a first embodiment of the present application; Figure 3 is a schematic diagram of a first pixel unit reflecting light when the display surfaces of the first pixel unit and a second pixel unit are on different sides in an electronic paper display panel according to a first embodiment of the present application; Figure 4 is a schematic diagram of a first pixel unit absorbing light when the display surfaces of the first pixel unit and a second pixel unit are on the same side in an electronic paper display panel according to a first embodiment of the present application; Figure 5 is a schematic diagram of a first pixel unit reflecting light when the display surfaces of the first pixel unit and a second pixel unit are on the same side in an electronic paper display panel according to a first embodiment of the present application; Figure 6 is a schematic diagram of a first pixel unit and a second pixel unit arranged apart from each other according to a first embodiment of the present application; Figure 7 is a schematic diagram of a first pixel unit and a second pixel unit arranged apart from each other according to a first embodiment of the present application; Figure 8 is a schematic diagram of a driving unit according to a first embodiment of the present application; Figure 9 is a schematic diagram of a second driving unit and a fourth driving unit in another driving unit according to a first embodiment of the present application; Figure 10 is a schematic diagram of a first driving unit and a third driving unit in another driving unit according to a first embodiment of the present application; Figure 11 is a schematic diagram of a magnetic layer according to a first embodiment of the present application; Figure 12 is a schematic diagram of an electromagnetic unit according to a first embodiment of the present application; Figure 13 is a schematic diagram of a first electrophoretic accommodating cavity and a second electrophoretic accommodating cavity according to a first embodiment of the present application; Figure 14 is a schematic diagram of an electronic paper display panel of a second embodiment of the present application; Figure 15 is a schematic diagram of a control method of an electronic paper display panel of an embodiment of the present application.

[0017] wherein 10, display device; 20, driving circuit; 30, electronic paper display panel; 110, first substrate; 120, second substrate; 200, first pixel unit; 210, first upper driving electrode; 220, first electrophoretic containing cavity; 230, first lower driving electrode; 240, first light-absorbing particle; 250, second light-absorbing particle; 260, first light-reflecting particle; 300, second pixel unit; 310, second upper driving electrode; 320, second electrophoretic containing cavity; 330, second lower driving electrode; 340, third light-absorbing particle; 350, fourth light-absorbing particle; 360, second light-reflecting particle; 370, multi-stable liquid crystal; 410, first driving unit; 420, second driving unit; 430, third driving unit; 440, fourth driving unit; 510, light-shielding layer; 520, magnetic layer; 600, electromagnetic unit; 610, electromagnetic electrode plate; 620, electromagnetic control active switch. DETAILED DESCRIPTION

[0018] It needs to be understood that the terms used herein, the specific structures and functional details disclosed, are only for the purpose of describing specific embodiments, and are representative, but the present application can be embodied in many alternative forms, and should not be interpreted as being limited to the embodiments set forth herein.

[0019] In the description of the present application, the terms "first", "second" are only for the purpose of description, and should not be understood as indicating relative importance, or implying the number of the indicated technical features. Therefore, unless otherwise specified, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; the meaning of "multiple" is two or more. The term "comprise" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof can exist or be added.

[0020] In addition, the terms indicating the orientation or positional relationship of "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are described based on the orientation or relative position relationship shown in the drawings, and are only for the convenience of the simplified description of the present application, and should not be understood as indicating that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0021] In addition, unless specifically stated and limited otherwise, the terms "mounting", "connected", "connecting" should be interpreted broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0022] The application will be described in detail below with reference to the accompanying drawings and optional embodiments.

[0023] Figure 1 is a schematic diagram of a display device according to an embodiment of the application, as Figure 1 As shown in the figure, the application discloses a display device 10, which comprises a driving circuit 20 and an electronic paper display panel 30, the driving circuit 20 is connected with the electronic paper display panel 30, and is used for controlling the electronic paper display panel 30 to display a picture.

[0024] For example, the driving circuit 20 is used for charging the first upper driving electrode 210, the first lower driving electrode 230, the second upper driving electrode 310 and the second lower driving electrode 330 in the electronic paper display panel 30 with a required voltage, so that an electric field is formed between the first upper driving electrode 210 and the first lower driving electrode 230, and the first light-absorbing particles 240, the second light-absorbing particles 250 and the first light-reflecting particles 260 are controlled to move in the electric field; an electric field is formed between the second upper driving electrode 310 and the second lower driving electrode 330, and the third light-absorbing particles 340, the fourth light-absorbing particles 350 and the second light-reflecting particles 360 are controlled to move in the electric field, or the multi-stable liquid crystal 370 is controlled to deflect.

[0025] The application also discloses an electronic paper display panel 30, which can be used in the display device 10 described above, and the application provides the following design for the electronic paper display panel 30, and is specifically introduced through several embodiments: Embodiment 1 Figure 2 is a schematic diagram of the first pixel unit absorbing light when the display surfaces of the first pixel unit and the second pixel unit are different sides in an electronic paper display panel according to the first embodiment of the application, Figure 3 is a schematic diagram of the first pixel unit reflecting light when the display surfaces of the first pixel unit and the second pixel unit are different sides in an electronic paper display panel according to the first embodiment of the application.

[0026] Figure 4is a schematic view of a first pixel unit absorbing light when display surfaces of the first pixel unit and a second pixel unit are on the same side in an electronic paper display panel according to a first embodiment of the present application, Figure 5 is a schematic view of a first pixel unit reflecting light when display surfaces of the first pixel unit and a second pixel unit are on the same side in an electronic paper display panel according to the first embodiment of the present application, as shown in Figures 2-5

[0027] The absorption of light can be understood as displaying black, and the reflection of light can be understood as reflecting white or the color of the particles themselves, such as displaying white when the particles are white particles, and displaying red, green, or blue when the particles are red, green, or blue particles.

[0028] The present application also discloses an electronic paper display panel 30, which further comprises a first substrate 110, a plurality of first pixel units 200, a plurality of second pixel units 300, and a second substrate 120, the first pixel units 200 and the second pixel units 300 are located between the first substrate 110 and the second substrate 120, the plurality of first pixel units 200 and the plurality of second pixel units 300 are arranged in a matrix, and the plurality of first pixel units 200 and the plurality of second pixel units 300 are arranged at intervals.

[0029] The first pixel unit 200 comprises a first upper driving electrode 210, a first electrophoretic containing cavity 220, and a first lower driving electrode 230, the first upper driving electrode 210 and the first lower driving electrode 230 are respectively arranged on both sides of the first electrophoretic containing cavity 220, and the first pixel unit 200 further comprises first light-absorbing particles 240, second light-absorbing particles 250, and first light-reflecting particles 260 arranged in the first electrophoretic containing cavity 220.

[0030] The charge amount of the first light-absorbing particles 240, the charge amount of the first light-reflecting particles 260, and the charge amount of the second light-absorbing particles 250 decrease in turn, the first light-absorbing particles 240 and the second light-absorbing particles 250 have the same polarity, and the first light-absorbing particles 240 and the first light-reflecting particles 260 have opposite polarities.

[0031] ​It is possible that the first light-absorbing particles 240 and the second light-absorbing particles 250 are both negative, and the first light-reflecting particles 260 are positive; it is also possible that the first light-absorbing particles 240 and the second light-absorbing particles 250 are both positive, and the first light-reflecting particles 260 are negative; for the convenience of description, the first light-absorbing particles 240 and the second light-absorbing particles 250 are both positive, and the first light-reflecting particles 260 are negative.

[0032] For the convenience of description, the first light-absorbing particles 240 and the second light-absorbing particles 250 are black, and the first light-reflecting particles 260 are white; of course, the first light-reflecting particles 260 are red, green or blue, which are also within the protection scope of the present application.

[0033] For example, the first substrate 110 is taken as a base, the first pixel unit 200 and the second pixel unit 300 are arranged on the first substrate 110, the first lower driving electrode 230 is arranged on the first substrate 110, and the first upper driving electrode 210 is arranged on the side of the first electrophoretic containing cavity 220 away from the first substrate 110; thus, by charging the first upper driving electrode 210 and the first lower driving electrode 230 through the driving circuit 20, the first light-absorbing particles 240, the second light-absorbing particles 250 and the first light-reflecting particles 260 in the first electrophoretic containing cavity 220 can be driven to move to display a picture.

[0034] For example, when the display surfaces of the first pixel unit 200 and the second pixel unit 300 are different sides, the first upper driving electrode 210 and the first lower driving electrode 230 are used to drive the second light-absorbing particles 250 to be located on the side of the first light-reflecting particles 260 close to the display surface of the second pixel unit 300.

[0035] For example, when the display surface of the second pixel unit 300 is the side of the second substrate 120 away from the first substrate 110, the display surface of the first pixel unit 200 is the side of the first substrate 110 away from the second substrate 120.

[0036] When the first pixel unit 200 needs to display white, a negative voltage is loaded to the first upper driving electrode 210, so that the second light-absorbing particles 250 and the first light-absorbing particles 240 move upward; a positive voltage is loaded to the first lower driving electrode 230, so that the first light-reflecting particles 260 move downward; thus, the first pixel unit 200 displays white, and the side of the first pixel unit 200 facing the second substrate 120 is the second light-absorbing particles 250, which does not interfere with the display of the second pixel unit 300.

[0037] When the first pixel unit 200 needs to display black, a negative voltage is loaded to the first upper driving electrode 210, so that the second light-absorbing particles 250 and the first light-absorbing particles 240 move upward; a positive voltage is loaded to the first lower driving electrode 230, so that the first light-reflecting particles 260 move downward.

[0038] Then a negative voltage is loaded to the first lower driving electrode 230, and a positive voltage is loaded to the first upper driving electrode 210, and because the charge amount of the first light-absorbing particles 240 is greater than that of the second light-absorbing particles 250, and the movement of the second light-absorbing particles 250 needs to overcome the friction between the electrophoretic fluids.

[0039] Therefore, the magnitude of the negative voltage loaded to the first lower driving electrode 230 and the positive voltage loaded to the first upper driving electrode 210 can make the first light-absorbing particles 240 move, but not enough to make the second light-absorbing particles 250 move, so that the first light-reflecting particles 260 are located between the first light-absorbing particles 240 and the second light-absorbing particles 250, and the side of the first pixel unit 200 facing the second substrate 120 is the second light-absorbing particles 250, so that the side of the first pixel unit 200 facing the first substrate 110 and the side of the first pixel unit 200 facing the second substrate 120 both display black, and do not interfere with the display of the second pixel unit 300.

[0040] When the display surfaces of the first pixel unit 200 and the second pixel unit 300 are the same side, the first pixel unit 200 and the second pixel unit 300 can be used to display a picture, for example, when the display surface of the second pixel unit 300 is the side of the second substrate 120 facing away from the first substrate 110, the side of the first substrate 110 facing away from the second substrate 120 is not used for picture display, so even if the first light-reflecting particles 260 move to the side of the first substrate 110, it does not matter and does not affect the picture display on the side of the second substrate 120 facing away from the first substrate 110.

[0041] At this time, when the first pixel unit 200 and the second pixel unit 300 both need to display black, a positive voltage is loaded to the first upper driving electrode 210, so that the first light-reflecting particles 260 move upward, and a negative voltage is loaded to the first lower driving electrode 230, so that the first light-absorbing particles 240 and the second light-absorbing particles 250 move downward.

[0042] When the first pixel unit 200 and the second pixel unit 300 both need to display white color, a negative voltage is loaded to the first upper driving electrode 210, so that the first light-absorbing particle 240 moves upward or both the first light-absorbing particle 240 and the second light-absorbing particle 250 move upward, and a positive voltage is loaded to the first lower driving electrode 230, so that the first light-reflecting particle 260 moves downward.

[0043] Compared with the existing electronic paper display panel scheme, the scheme of the present application can realize double-face display and single-face display switching of an electronic paper display panel 30 by arranging a first pixel unit 200 and a second pixel unit 300 between a first substrate 110 and a second substrate 120, and then arranging a first light-absorbing particle 240, a second light-absorbing particle 250 and a first light-reflecting particle 260 in a first electrophoretic containing cavity 220 of the first pixel unit 200, and sequentially reducing the charge amount of the first light-absorbing particle 240, the charge amount of the first light-reflecting particle 260 and the charge amount of the second light-absorbing particle 250, and making the polarity of the first light-absorbing particle 240 same as that of the second light-absorbing particle 250 and opposite to that of the first light-reflecting particle 260; so that the first upper control electrode and the first lower control electrode can control the second light-absorbing particle 250 to be located at a side of the first light-reflecting particle 260 close to a display surface of the second pixel unit 300, realizing switching of double-face display and single-face display of an electronic paper display panel 30 and improving the applicability of the electronic paper display panel 30; when switching to single-face display, the first pixel unit 200 and the second pixel unit 300 jointly display a picture, which can improve the picture resolution of the electronic paper display panel 30 in single-face display.

[0044] Figure 6 is a schematic view of interval arrangement of a first pixel unit and a second pixel unit in the first embodiment of the present application, Figure 7 is another schematic view of interval arrangement of a first pixel unit and a second pixel unit in the first embodiment of the present application, which is combined with Figure 6 and Figure 7 As shown in the figures, since the electronic paper display panel 30 includes a plurality of first pixel units 200 and a plurality of second pixel units 300, it can be that a first pixel unit 200 and a second pixel unit 300 are arranged at intervals, i.e., the first pixel unit 200 is located between two adjacent second pixel units 300, and the second pixel unit 300 is located between two adjacent first pixel units 200.

[0045] Exemplarily, the three first pixel units 200 and the three second pixel units 300 are arranged in sequence, that is, the three first pixel units 200 are located between the two adjacent second pixel units 300, and the three second pixel units 300 are located between the two adjacent first pixel units 200, in other words, the three first pixel units 200 form a group, the three second pixel units 300 form a group, and in the horizontal direction, the group of first pixel units 200 is located between the two adjacent groups of second pixel units 300, and the group of second pixel units 300 is located between the two adjacent groups of first pixel units 200.

[0046] Exemplarily, one first pixel unit 200 forms a group, and three second pixel units 300 form a group, and the group of first pixel units 200 is located between the two adjacent groups of second pixel units 300, and the group of second pixel units 300 is located between the two adjacent groups of first pixel units 200.

[0047] The interval arrangement combination of the first pixel unit 200 and the second pixel unit 300 should belong to the protection scope of the present application.

[0048] Referring to Figures 2-5 In the embodiment, the display surface of the second pixel unit 300 is fixed, and the electronic paper display panel 30 further comprises a light shielding layer 510, which is arranged on the first substrate 110, and the orthographic projection of the light shielding layer 510 on the first substrate 110 covers the orthographic projection of the second pixel unit 300 on the first substrate 110.

[0049] The second pixel unit 300 comprises a second upper driving electrode 310, a second electrophoretic containing cavity 320 and a second lower driving electrode 330, the second upper driving electrode 310 and the second lower driving electrode 330 are arranged on the two sides of the second electrophoretic containing cavity 320 respectively, and the second pixel unit 300 further comprises a multi-stable liquid crystal 370 arranged in the second electrophoretic containing cavity 320, and the side of the second substrate 120 away from the first substrate 110 is one side of the display surface of the second pixel unit 300.

[0050] The display surface of the second pixel unit 300 is fixed to the side of the second substrate 120 away from the first substrate 110, and then the light shielding layer 510 arranged on the first substrate 110 can reduce the control difficulty, and when the display surfaces of the first pixel unit 200 and the second pixel unit 300 display on different sides, the side of the second pixel unit 300 close to the first substrate 110 will not emit light, which will not affect the normal display of the first pixel unit 200, and the light shielding layer 510 can be prepared by using a black matrix material.

[0051] The display surface of the second pixel unit 300 is fixed to the side of the second substrate 120 facing away from the first substrate 110. Of course, the display surface of the second pixel unit 300 can also be fixed to the side of the first substrate 110 facing away from the second substrate 120. It is only necessary to adjust the light shielding layer 510 to the second substrate 120.

[0052] Figure 8 is a schematic diagram of a driving unit of the first embodiment of the present application, referring to Figure 8 As shown, the electronic paper display panel 30 further includes a first driving unit 410, a second driving unit 420, a third driving unit 430, and a fourth driving unit 440.

[0053] The first driving unit 410 is connected with the first upper driving electrode 210, the second driving unit 420 is connected with the first lower driving electrode 230, the third driving unit 430 is connected with the second upper driving electrode 310, and the fourth driving unit 440 is connected with the second lower driving electrode 330.

[0054] The second driving unit 420, the fourth driving unit 440, the first lower driving electrode 230, and the second lower driving electrode 330 are all arranged on the first substrate 110; and the first driving unit 410, the third driving unit 430, the first upper driving electrode 210, and the second upper driving electrode 310 are all arranged on the second substrate 120.

[0055] The second driving unit 420 and the fourth driving unit 440 are located within the orthographic projection of the light shielding layer 510 on the first substrate 110, and the first driving unit 410 and the third driving unit 430 are located within the orthographic projection of the first pixel unit 200 on the second substrate 120.

[0056] Among them, the first driving unit 410, the second driving unit 420, the third driving unit 430, and the fourth driving unit 440 are all double-gate active switches. Since the area of the double-gate active switch is large, the second driving unit 420 and the fourth driving unit 440 are arranged below the light shielding layer 510, so that when the display surfaces of the first pixel unit 200 and the second pixel unit 300 are on different sides, the effective display area, i.e., the aperture ratio, of the first pixel unit 200 can be improved.

[0057] Figure 9 is a schematic diagram of the second driving unit and the fourth driving unit in another driving unit of the first embodiment of the present application, Figure 10 is a schematic diagram of the first driving unit and the third driving unit in another driving unit of the first embodiment of the present application, combined withFigures 9-10 As shown, the first driving unit 410 is connected to the first upper driving electrode 210, the second driving unit 420 is connected to the first lower driving electrode 230, the third driving unit 430 is connected to the second upper driving electrode 310, and the fourth driving unit 440 is connected to the second lower driving electrode 330.

[0058] The first driving unit 410, the second driving unit 420, the third driving unit 430, the fourth driving unit 440, the first lower driving electrode 230 and the second lower driving electrode 330 are all disposed on the first substrate 110; the first upper driving electrode 210 and the second upper driving electrode 310 are both disposed on the second substrate 120.

[0059] The first driving unit 410, the second driving unit 420, the third driving unit 430, and the fourth driving unit 440 are located within the orthogonal projection of the light-shielding layer 510 onto the first substrate 110.

[0060] The first driving unit 410, the second driving unit 420, the third driving unit 430, and the fourth driving unit 440 are all disposed on the first substrate 110, and are all located below the light-shielding layer 510. The second driving unit 420 and the fourth driving unit 440 can be directly connected to the first lower driving electrode 230 and the second lower driving electrode 330. The first driving unit 410 and the second driving unit 420 are connected to the first upper driving electrode 210 and the second upper driving electrode 310 on the other side by a connecting line provided in the second electrophoresis receiving cavity 320. In this way, whether it is a single-sided display or a double-sided display, the first driving unit 410, the second driving unit 420, the third driving unit 430, and the fourth driving unit 440 will not affect the effective display area of ​​the electronic paper display panel 30, i.e., the aperture ratio.

[0061] Figure 11 This is a schematic diagram of a magnetic layer according to the first embodiment of this application. See also: Figure 11As shown, when the display surfaces of the first pixel unit 200 and the second pixel unit 300 are on different sides, for example, the display surface of the second pixel unit 300 is on the side of the second substrate 120 facing away from the first substrate 110, the display surface of the first pixel unit 200 is on the side of the first substrate 110 facing away from the second substrate 120; the first upper driving electrode 210 needs to drive the second light-absorbing particles 250 to move towards the second substrate 120, and then the first lower driving electrode 230 drives the first light-reflecting particles 260 and the first light-absorbing particles 240 to display the picture.

[0062] In particular, when the first pixel unit 200 displays black, the first upper driving electrode 210 needs to be loaded with a negative voltage to make the second light-absorbing particles 250 and the first light-absorbing particles 240 move upwards; the first lower driving electrode 230 is loaded with a positive voltage to make the first light-reflecting particles 260 move downwards; then the first lower driving electrode 230 is loaded with a negative voltage and the first upper driving electrode 210 is loaded with a positive voltage, because the charge amount of the first light-absorbing particles 240 is greater than that of the second light-absorbing particles 250, the size of the negative voltage of the first lower driving electrode 230 and the positive voltage of the first upper driving electrode 210 can make the first light-absorbing particles 240 move, but not the second light-absorbing particles 250.

[0063] Then the first light-reflecting particles 260 are located between the first light-absorbing particles 240 and the second light-absorbing particles 250, so that the first pixel unit 200 displays black on the side facing the first substrate 110 and on the side facing the second substrate 120, and the side of the first pixel unit 200 facing the second substrate 120 is the second light-absorbing particles 250, which does not interfere with the display of the second pixel unit 300.

[0064] However, there is still a little repulsive force between the positive voltage of the first upper driving electrode 210 and the second light-absorbing particles 250. In order to avoid the repulsive force causing the second light-absorbing particles 250 to move towards the first substrate 110, causing the first pixel unit 200 to leak light in the direction of the second substrate 120 away from the first substrate 110, the application further provides a magnetic layer 520 on the second substrate 120, and the second light-absorbing particles 250 are provided with magnetic material; in particular: The electronic paper display panel 30 further comprises a magnetic layer 520, the magnetic layer 520 is arranged on the second substrate 120, and the magnetic layer 520 is located between the first pixel unit 200 and the second substrate 120, and the second light-absorbing particles 250 have magnetism.

[0065] This allows the second light-absorbing particles 250 to adhere more closely to the side of the first electrophoresis containment cavity 220 closest to the second substrate 120. When the display surfaces of the first pixel unit 200 and the second pixel unit 300 are on different sides, and the first pixel unit 200 displays black, the first pixel unit 200 will not reflect light in the direction away from the first substrate 110 on the second substrate 120, thus not affecting the normal picture when the electronic paper display panel 30 is displayed on both sides.

[0066] Furthermore, the magnetic layer 520 is located on the side of the first upper driving electrode 210 facing the first lower driving electrode 230, and the material of the magnetic layer 520 includes a carbon-based magnetic material. The fact that the magnetic layer 520 is made of a carbon-based magnetic material ensures that it does not affect the electric field between the first upper driving electrode 210 and the first lower driving electrode 230, thus preventing the uncontrollable situation where the first light-absorbing particle 240, the second light-absorbing particle 250, and the first light-reflecting particle 260 cannot be controlled.

[0067] Figure 12 This is a schematic diagram of an electromagnetic unit according to the first embodiment of this application. See also: Figure 12 As shown, the electronic paper display panel 30 further includes an electromagnetic unit 600, which includes an electromagnetic electrode plate 610 and an electromagnetic control active switch 620. The electromagnetic electrode plate 610 and the electromagnetic control switch are both disposed on the second substrate 120, and the electromagnetic electrode plate 610 is located between the first upper driving electrode 210 and the second substrate 120. The electromagnetic electrode plate 610 is used to generate a controllable magnetic field to control the movement of the second light-absorbing particles 250.

[0068] The gate of the electromagnetic active switch is connected to the first upper driving electrode 210. When the first pixel unit 200 needs to display black, the first upper driving electrode 210 needs to be loaded with a positive voltage. At the same time, the electromagnetic active switch 620 can be turned on, so that external current can pass through the electromagnetic active switch, causing the electromagnetic electrode plate 610 to generate magnetism.

[0069] When the first pixel unit 200 needs to display white, the first upper driving electrode 210 needs to be loaded with a negative voltage, preventing the electromagnetic control active switch 620 from opening. This prevents external current from passing through the electromagnetic active switch, causing the second light-absorbing particle 250 to move, thus avoiding affecting the movement of the first light-absorbing particle 240 and the first light-reflecting particle 260. This reduces the difficulty of control.

[0070] Furthermore, the intensity of the electromagnetic electrode plate 610 increases as the gray level of the first pixel unit 200 decreases, in order to prevent the second light-absorbing particles 250 from moving downward toward the first substrate 110.

[0071] Figure 13 is a schematic diagram of a first electrophoretic containing cavity and a second electrophoretic containing cavity of a first embodiment of the present application, referring to Figure 13 As shown, the direction of the first substrate 110 towards the second substrate 120 is defined as the first direction, the width of the first electrophoretic containing cavity 220 gradually decreases along the first direction, and the width of the second electrophoretic containing cavity 320 gradually increases along the first direction. In this way, both the first pixel unit 200 and the second pixel unit 300 have a larger effective display area when displaying on both sides.

[0072] Moreover, after such arrangement, the number of the second light-absorbing particles 250 is less than the number of the first light-absorbing particles 240, and the number of the second light-absorbing particles 250 is less than the number of the first light-reflecting particles 260.

[0073] By gradually decreasing the width of the first electrophoretic containing cavity 220 along the first direction, the smaller number of the second light-absorbing particles 250 is sufficient to cover the side of the first electrophoretic containing cavity 220 close to the second substrate 120, which can reduce the number of the second light-absorbing particles 250, so that the total amount of the second light-absorbing particles 250 and the first light-absorbing particles 240 is close to the total amount of the first light-reflecting particles 260, and the total charge amount of the second light-absorbing particles 250 and the first light-absorbing particles 240 is equal to the total charge amount of the first light-reflecting particles 260, so as to avoid uneven migration distribution of the first light-absorbing particles 240 and the first light-reflecting particles 260, which leads to color deviation or abnormal gray scale in local screen, for example, the white area appears dull due to insufficient first light-reflecting particles 260.

[0074] Embodiment 2: Figure 14 is a schematic diagram of an electronic paper display panel of a second embodiment of the present application, referring to Figure 14 As shown, different from the first embodiment, the second pixel unit 300 in the present embodiment is provided with third light-absorbing particles 340, fourth light-absorbing particles 350 and second light-reflecting particles 360 in the second electrophoretic containing cavity 320, the second pixel unit 300 includes a second upper driving electrode 310, a second electrophoretic containing cavity 320 and a second lower driving electrode 330, the second upper driving electrode 310 and the second lower driving electrode 330 are respectively arranged on both sides of the second electrophoretic containing cavity 320, and the second pixel unit 300 further includes the third light-absorbing particles 340, the fourth light-absorbing particles 350 and the second light-reflecting particles 360 arranged in the second electrophoretic containing cavity 320.

[0075] The charge amount of the third light-absorbing particles 340, the charge amount of the second light-reflecting particles 360, and the charge amount of the fourth light-absorbing particles 350 decrease in turn, the third light-absorbing particles 340 have the same polarity as the fourth light-absorbing particles 350, and the third light-absorbing particles 340 have the opposite polarity to the second light-reflecting particles 360.

[0076] Exemplarily, the first substrate 110 can be taken as a base, the second lower driving electrode 330 is arranged on the first substrate 110, and the second upper driving electrode 310 is arranged on the side of the first electrophoretic containing cavity 220 away from the first substrate 110. Thus, the first light-absorbing particles 240, the second light-absorbing particles 250, and the first light-reflecting particles 260 in the first electrophoretic containing cavity 220 can be driven to move to display a picture by charging the second upper driving electrode 310 and the second lower driving electrode 330 through the driving circuit 20.

[0077] Compared with the existing electronic paper display panel scheme, the scheme of the present application can drive the first light-absorbing particles 240, the second light-absorbing particles 250, and the first light-reflecting particles 260 in the first electrophoretic containing cavity 220 of the first pixel unit 200 to move to display a picture by arranging the first pixel unit 200 and the second pixel unit 300 between the first substrate 110 and the second substrate 120, and then arranging the first light-absorbing particles 240, the second light-absorbing particles 250, and the first light-reflecting particles 260 in the first electrophoretic containing cavity 220 of the first pixel unit 200, and sequentially decreasing the charge amount of the first light-absorbing particles 240, the charge amount of the first light-reflecting particles 260, and the charge amount of the second light-absorbing particles 250, and making the first light-absorbing particles 240 have the same polarity as the second light-absorbing particles 250 and the opposite polarity to the first light-reflecting particles 260. Thus, the first upper control electrode and the first lower control electrode can control the second light-absorbing particles 250 to be located on the side of the first light-reflecting particles 260 close to the display surface of the second pixel unit 300, so that the electronic paper display panel 30 can switch between double-sided display and single-sided display, and the applicability of the electronic paper display panel 30 is improved. When switching to single-sided display, the first pixel unit 200 and the second pixel unit 300 can display a picture together, so that the picture resolution of the electronic paper display panel 30 in single-sided display can be improved.

[0078] And relative to the scheme of the first embodiment, the embodiment sets the third light-absorbing particles 340, the fourth light-absorbing particles 350 and the second light-reflecting particles 360 in the second electrophoretic containing cavity 320, the charge amount of the third light-absorbing particles 340, the charge amount of the second light-reflecting particles 360 and the charge amount of the fourth light-absorbing particles 350 decrease in turn, the polarity of the third light-absorbing particles 340 is same as that of the fourth light-absorbing particles 350, and the polarity of the third light-absorbing particles 340 is opposite to that of the second light-reflecting particles 360, so there is no need to set the light-blocking layer 510 on the first substrate 110, and when switching to single-side display, the side of the first substrate 110 away from the second substrate 120 can be used as the side of the display panel, and the side of the second substrate 120 away from the first substrate 110 can also be used as the side of the display panel.

[0079] Figure 15 is a schematic diagram of a control method of an electronic paper display panel according to an embodiment of the present application, referring to Figure 15 It is also disclosed a control method of an electronic paper display panel 30, which is used for controlling the electronic paper display panel 30, and includes the steps of: S1: when switching to a mode in which the display surfaces of the first pixel unit and the second pixel unit are different sides, the first upper driving electrode and the first lower driving electrode are used to drive the second light-absorbing particles to be located on the side of the first light-reflecting particles close to the display surface of the second pixel unit.

[0080] The S1: when switching to a mode in which the display surfaces of the first pixel unit and the second pixel unit are different sides, the first upper driving electrode and the first lower driving electrode are used to drive the second light-absorbing particles to be located on the side of the first light-reflecting particles close to the display surface of the second pixel unit, further includes: S11: when switching to a mode in which the display surfaces of the first pixel unit and the second pixel unit are different sides, and when the first pixel unit needs to display black, a negative voltage is loaded to the first upper driving electrode to make the second light-absorbing particles and the first light-absorbing particles move upward, and a positive voltage is loaded to the first lower driving electrode to make the first light-reflecting particles move downward; S12: a negative voltage is loaded to the first lower driving electrode, and a positive voltage is loaded to the first upper driving electrode, the first light-absorbing particles move downward, and the first light-reflecting particles are located between the first light-absorbing particles and the second light-absorbing particles; The negative voltage loaded to the first lower driving electrode 230 is insufficient to make the second light-absorbing particles 250 move against the resistance.

[0081] S13: when the first pixel unit needs to display white, the first upper driving electrode is loaded with a negative voltage, so that the second light-absorbing particles and the first light-absorbing particles move upward; the first lower driving electrode is loaded with a positive voltage, so that the first light-reflecting particles move downward.

[0082] The control method of the electronic paper display panel 30 further includes the following steps: S2: when switching to a mode in which the display surfaces of the first pixel unit and the second pixel unit are on the same side, the first upper driving electrode and the first lower driving electrode are used to drive the second light-absorbing particles to be located on a side away from the display surface of the first pixel unit of the first light-reflecting particles; The S2: when switching to a mode in which the display surfaces of the first pixel unit and the second pixel unit are on the same side, the first upper driving electrode and the first lower driving electrode are used to drive the second light-absorbing particles to be located on a side away from the display surface of the first pixel unit of the first light-reflecting particles; step includes: S21: when switching to a mode in which the display surfaces of the first pixel unit and the second pixel unit are on the same side, when the first pixel unit needs to display black, the first upper driving electrode is loaded with a negative voltage, so that the second light-absorbing particles and the first light-absorbing particles move upward; the first lower driving electrode is loaded with a positive voltage, so that the first light-reflecting particles move downward; S22: when the first pixel unit needs to display white, the first upper driving electrode is loaded with a positive voltage, so that the first light-reflecting particles move upward; the first lower driving electrode is loaded with a negative voltage, so that the second light-absorbing particles and the first light-absorbing particles move downward; By setting the first pixel unit 200 and the second pixel unit 300 between the first substrate 110 and the second substrate 120, then the first electrophoretic containing cavity 220 of the first pixel unit 200 is provided with the first light absorbing particles 240, the second light absorbing particles 250 and the first light reflecting particles 260, and the charge amount of the first light absorbing particles 240, the charge amount of the first light reflecting particles 260 and the charge amount of the second light absorbing particles 250 decrease in turn, the polarity of the first light absorbing particles 240 is the same as that of the second light absorbing particles 250, and the polarity of the first light absorbing particles 240 is opposite to that of the first light reflecting particles 260; so that the first upper control electrode and the first lower control electrode can control the second light absorbing particles 250 to be located on the side of the first light reflecting particles 260 close to the display surface of the second pixel unit 300, realizing that the double-sided display and the single-sided display of the electronic paper display panel 30 can be switched, and improving the applicability of the electronic paper display panel 30; when switched to single-sided display, the first pixel unit 200 and the second pixel unit 300 display a picture together, which can improve the picture resolution of the electronic paper display panel 30 when displaying on the single side.

[0083] It should be noted that the steps involved in the present scheme are not limited to the order of execution, and the steps written in the front can be executed first, or executed later, or even executed simultaneously, as long as the scheme can be implemented, it should be considered as belonging to the protection scope of the present application.

[0084] It should be noted that the inventive concept of the present application can form a very large number of embodiments, but the length of the application file is limited and cannot be listed one by one, therefore, on the premise of not conflicting, the above described various embodiments or technical features can be combined to form new embodiments, and the combination of each embodiment or technical feature will enhance the original technical effect.

[0085] The above is a further detailed description of the present application in combination with specific optional embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as belonging to the protection scope of the present application.

Claims

1. An electronic paper display panel, characterized by, The electronic paper display panel further comprises a first substrate, a plurality of first pixel units, a plurality of second pixel units and a second substrate, the first pixel units and the second pixel units are located between the first substrate and the second substrate, the plurality of first pixel units and the plurality of second pixel units are arranged in a matrix manner, and the plurality of first pixel units and the plurality of second pixel units are arranged in a spaced manner. The first pixel unit comprises a first upper driving electrode, a first electrophoretic containing cavity and a first lower driving electrode, the first upper driving electrode and the first lower driving electrode are arranged on two sides of the first electrophoretic containing cavity respectively, and the first pixel unit further comprises first light-absorbing particles, second light-absorbing particles and first light-reflecting particles arranged in the first electrophoretic containing cavity. The charge quantity of the first light-absorbing particles, the charge quantity of the first light-reflecting particles and the charge quantity of the second light-absorbing particles decrease in turn, the polarity of the first light-absorbing particles is the same as that of the second light-absorbing particles, and the polarity of the first light-absorbing particles is opposite to that of the first light-reflecting particles.

2. The electronic paper display panel of claim 1, wherein, The second pixel unit comprises a second upper driving electrode, a second electrophoretic containing cavity and a second lower driving electrode, the second upper driving electrode and the second lower driving electrode are arranged on two sides of the second electrophoretic containing cavity respectively, and the second pixel unit further comprises third light-absorbing particles, fourth light-absorbing particles and second light-reflecting particles arranged in the second electrophoretic containing cavity. The charge quantity of the third light-absorbing particles, the charge quantity of the second light-reflecting particles and the charge quantity of the fourth light-absorbing particles decrease in turn, the polarity of the third light-absorbing particles is the same as that of the fourth light-absorbing particles, and the polarity of the third light-absorbing particles is opposite to that of the second light-reflecting particles.

3. The electronic paper display panel of claim 1, wherein, The electronic paper display panel further comprises a light-shielding layer, the light-shielding layer is arranged on the first substrate, and the orthographic projection of the light-shielding layer on the first substrate covers the orthographic projection of the second pixel unit on the first substrate. The second pixel unit comprises a second upper driving electrode, a second electrophoretic containing cavity and a second lower driving electrode, the second upper driving electrode and the second lower driving electrode are arranged on two sides of the second electrophoretic containing cavity respectively, and the second pixel unit further comprises third light-absorbing particles, fourth light-absorbing particles and second light-reflecting particles arranged in the second electrophoretic containing cavity.

4. The electronic paper display panel of claim 3, wherein, The electronic paper display panel further comprises a first driving unit, a second driving unit, a third driving unit and a fourth driving unit. The first driving unit is connected with the first upper driving electrode, the second driving unit is connected with the first lower driving electrode, the third driving unit is connected with the second upper driving electrode, and the fourth driving unit is connected with the second lower driving electrode. The second driving unit, the fourth driving unit, the first lower driving electrode and the second lower driving electrode are arranged on the first substrate; the first driving unit, the third driving unit, the first upper driving electrode and the second upper driving electrode are arranged on the second substrate. The second driving unit and the fourth driving unit are located in the orthographic projection of the light shielding layer on the first substrate, and the first driving unit and the third driving unit are located in the orthographic projection of the first pixel unit on the second substrate.

5. The electronic paper display panel of claim 3, wherein, The electronic paper display panel further comprises a magnetic layer, the magnetic layer is arranged on the second substrate, and the magnetic layer is located between the first pixel unit and the second substrate, and the second light-absorbing particles have magnetism.

6. The electronic paper display panel of claim 5, wherein, The magnetic layer is located on the side of the first lower driving electrode facing the first upper driving electrode, and the material of the magnetic layer comprises a carbon-based magnetic material.

7. The electronic paper display panel of claim 3, wherein, The direction of the first substrate facing the second substrate is defined as the first direction, the width of the first electrophoretic containing cavity gradually decreases along the first direction, and the width of the second electrophoretic containing cavity gradually increases along the first direction.

8. The electronic paper display panel of claim 7, wherein, The number of the second light-absorbing particles is less than the number of the first light-absorbing particles, and the number of the second light-absorbing particles is less than the number of the first light-reflecting particles. 9.A method for controlling an electronic paper display panel, characterized by, The control method of the electronic paper display panel is used for controlling the electronic paper display panel in any one of claims 1-8, and the control method of the electronic paper display panel comprises the steps of: When switching to a mode in which the display surfaces of the first pixel unit and the second pixel unit are different sides, the first upper driving electrode and the first lower driving electrode are used to drive the second light-absorbing particles to be located on the side of the first light-reflecting particles close to the display surface of the second pixel unit.

10. A display device, characterized by comprising: The display device comprises a driving circuit and the electronic paper display panel in any one of claims 1-8, the driving circuit is connected with the electronic paper display panel, and is used for controlling the electronic paper display panel to display a picture.

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