CN214311229U - Display module assembly and display device - Google Patents

Abstract

The embodiment of the application relates to a display module assembly and display device, display module assembly includes: the active display screen comprises a display area and a non-display area; the electronic ink screen is arranged on the light emitting side of the active display screen and comprises an electronic ink layer, a plurality of first electrode groups and a plurality of second electrode groups, wherein the first electrode groups and the second electrode groups are arranged in a plane parallel to the active display screen at intervals; the orthographic projection of each first electrode group on the active display screen is located in the non-display area, and the orthographic projection of each second electrode group on the active display screen is located in the display area. In this application, set up first electrode group through the region that corresponds at the non-display area to set up the second electrode group in the region that the display area corresponds, can realize that total pixel is more, the higher electron ink screen of pixel density, thereby effectively improved display module's resolution ratio.

Description

Display module assembly and display device

Technical Field

The embodiment of the application relates to the technical field of display, in particular to a display module and display equipment.

Background

Along with the continuous development of display technology, more and more double-screen display equipment have come into production, and double-screen display technology has realized abundanter display function, and the user can select the display screen that is used for showing voluntarily to display equipment's use flexibility has been promoted greatly. However, the resolution of the display screen in the current dual-screen display device is low, and the use requirement of the user cannot be met.

Disclosure of Invention

The embodiment of the application provides a display module assembly and display equipment, and the resolution ratio of the display module assembly can be improved.

A display module, comprising:

the active display screen comprises a display area and a non-display area;

the electronic ink screen is arranged on the light emitting side of the active display screen and comprises an electronic ink layer, a plurality of first electrode groups and a plurality of second electrode groups, and the first electrode groups and the second electrode groups are arranged in a plane parallel to the active display screen at intervals;

the orthographic projection of each first electrode group on the active display screen is located in the non-display area, and the orthographic projection of each second electrode group on the active display screen is located in the display area.

A display device comprises the display module.

Above-mentioned display module assembly and display device, display module assembly includes: the active display screen comprises a display area and a non-display area; the electronic ink screen is arranged on the light emitting side of the active display screen and comprises an electronic ink layer, a plurality of first electrode groups and a plurality of second electrode groups, and the first electrode groups and the second electrode groups are arranged in a plane parallel to the active display screen at intervals; the orthographic projection of each first electrode group on the active display screen is located in the non-display area, and the orthographic projection of each second electrode group on the active display screen is located in the display area. In this application, through setting up a plurality of first electrode group and a plurality of second electrode group each other at interval, make and all not switch on each other between each first electrode group and the second electrode group, can avoid taking place signal interference between the different electrode groups, thereby control every pixel of electronic ink screen more accurately, and the display effect is improved, moreover, set up first electrode group through the region that corresponds at the non-display area, and set up the second electrode group in the region that the display area corresponds, can realize that total pixel quantity is more, the higher electronic ink screen of pixel density, thereby the resolution ratio of display module assembly has effectively been improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view illustrating a display module according to an embodiment;

FIG. 2 is a partial enlarged view of an active display screen according to an embodiment;

FIG. 3 is a second schematic cross-sectional view of a display module according to an embodiment;

FIG. 4 is a third cross-sectional view of a display module according to an embodiment;

FIG. 5 is a fourth cross-sectional view of a display module according to an embodiment.

Element number description:

an active display screen: 100, respectively; a non-display area: 101, a first electrode and a second electrode; a display area: 102, and (b); a backlight assembly: 110; a liquid crystal device: 120 of a solvent; a pixel electrode layer: 121, a carrier; a liquid crystal layer: 122; a common electrode layer: 123; color resistance layer: 130, 130; black matrix: 140 of a solvent; an active light emitting device: 150; electronic ink screen: 200 of a carrier; a first electrode group: 210; first upper electrode layer: 211; a first lower electrode layer: 212; a second electrode group: 220, 220; a second upper electrode layer: 221; a second lower electrode layer: 222, c; electronic ink layer: 230.

Detailed Description

To facilitate an understanding of the embodiments of the present application, the embodiments of the present application will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. The embodiments of the present application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application belong. The terminology used herein in the description of the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the embodiments of the present application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on methods or positional relationships shown in the drawings, and are only used for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, should not be construed as limiting the embodiments of the present application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first preset signal may be referred to as a second preset signal, and similarly, a second preset signal may be referred to as a first preset signal, without departing from the scope of the present application. Both the first preset signal and the second preset signal are preset signals, but they are not the same preset signal.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.

Fig. 1 is a schematic cross-sectional view of a display module according to an embodiment, where the schematic cross-sectional view in each embodiment of the present application refers to a schematic cross-sectional view formed by cutting along a thickness direction of the display module, and in other embodiments, the definition of the schematic cross-sectional view is not repeated. Referring to fig. 1, in the present embodiment, the display module includes an active display screen 100 and an electronic ink screen 200.

The active display screen 100 includes a non-display area 101 and a display area 102. Specifically, fig. 1 shows a non-display area 101 and a display area 102 in an active display screen 100, as shown in fig. 1, the non-display area 101 and the display area 102 are adjacently disposed, the display area 102 refers to an area capable of emitting light in the active display screen 100, an area other than the display area 102 in the active display screen 100 is the non-display area 101, and structures such as circuit traces may be formed in the non-display area 101 to support the display area 102 to display or improve the display quality of each display area 102.

Fig. 2 is a partial enlarged view of the active display panel 100 according to an embodiment, fig. 2 is a top view taken along a thickness direction of the active display panel, and referring to fig. 2, fig. 2 shows four display pixels in the active display panel 100, and each display pixel includes three sub-pixels. Illustratively, one sub-pixel may be taken as one display region 102, and a region between the sub-pixels may be taken as a non-display region 101. As another example, that is, as an example provided in fig. 2, for an active display panel 100 with a small pitch between adjacent sub-pixels, one display pixel formed by three sub-pixels together may be used as one display area 102, and an area between the display pixels may be used as a non-display area 101.

With continued reference to fig. 1, an electronic ink screen 200 is disposed on the light-emitting side of the active display screen 100. Illustratively, the surface of the electronic ink screen 200 facing the active display screen 100 may be disposed adjacent to the surface of the light-emitting side of the active display screen 100, that is, the distance between the two surfaces is zero, so as to avoid light leakage of the active display screen 100. For another example, a surface of the electronic ink screen 200 facing the active display screen 100 may also have a certain distance from a surface of the light-emitting side of the active display screen 100, and a filling material having specific optical characteristics is disposed between the two surfaces to implement a desired optical adjustment function. It is understood that the above examples are for illustration only, and are not intended to specifically limit the distance between the electronic ink screen 200 and the active display screen 100, as long as the electronic ink screen 200 is disposed on the light emitting side of the active display screen 100, which falls within the protection scope of the present application.

The electronic ink screen 200 includes an electronic ink layer 230, a plurality of first electrode sets 210, and a plurality of second electrode sets 220. The electronic ink layer 230 includes light-shielding ink particles and reflective ink particles, for example, the light-shielding ink particles may be black charged particles, the reflective ink particles may be white charged particles, the types of charges carried by the black charged particles and the white charged particles are different, and the charged particles are encapsulated in a plurality of transparent microcapsules, each of which contains an equal number of the black charged particles and the white charged particles. Based on the structure of the electronic ink layer 230, an external electric field may be applied through the first electrode group 210 and the second electrode group 220 to control the movement of the black charged particles and the white charged particles, and finally form a stable arrangement, thereby enabling the electronic ink screen 200 to have different reflective properties. The electronic ink screen 200 has low power consumption, low refresh rate, better effect under strong light, similar reading effect to paper reading materials, and good eye protection function.

Each of the first electrode groups 210 and each of the second electrode groups 220 are disposed at intervals in a plane parallel to the active display panel 100, and it should be noted that, in fig. 1, only one of the first electrode groups 210 and one of the second electrode groups 220 are shown for simplifying the drawing. Specifically, the first electrode group 210 and the second electrode group 220 are disposed at an interval, that is, any first electrode group 210 is not communicated with any adjacent electrode group, but the embodiment does not specifically limit whether the first electrode group 210 or the second electrode group 220 is disposed adjacent to the first electrode group 210, that is, the first electrode group 210 may be disposed adjacent to the first electrode group 210 or may be disposed adjacent to the second electrode group 220, but only needs to be electrically isolated from the adjacent electrode groups. It is understood that the second electrode set 220 is disposed in a manner similar to that of the first electrode set 210, and thus, the description thereof is omitted. In this embodiment, the plurality of first electrode groups 210 and the plurality of second electrode groups 220 are disposed at intervals, so that the first electrode groups 210 and the second electrode groups 220 are not electrically connected to each other, and signal interference between different electrode groups can be avoided, so that each electronic ink pixel of the electronic ink screen 200 is more accurately controlled, and the display effect is improved.

Further, the orthographic projection of each first electrode group 210 on the active display screen 100 is located in the non-display area 101, and the orthographic projection of each second electrode group 220 on the active display screen 100 is located in the display area 102. The orthographic projections of the second electrode groups 220 may be located in the same display area 102, or the orthographic projections of the second electrode groups 220 may be located in each display area 102 in a one-to-one correspondence, and the correspondence between the display area 102 and the second electrode groups 220 may be determined according to the pixel size and the resolution of the active display screen 100 and the electronic ink screen 200. It is understood that the first electrode set 210 is disposed in a manner similar to that of the second electrode set 220, and thus, the description thereof is omitted. In the present embodiment, each first electrode group 210 corresponds to one electronic ink pixel, and each second electrode group 220 also corresponds to one electronic ink pixel. Therefore, by arranging the first electrode group 210 in the area corresponding to the non-display area 101 and the second electrode group 220 in the area corresponding to the display area 102, the number of electronic ink pixels in the electronic ink screen 200 can be greatly increased without reducing the size of the electronic ink pixels, thereby effectively improving the resolution of the electronic ink screen 200.

In this embodiment, the display module includes: an active display screen 100 including a display area 102 and a non-display area 101; the electronic ink screen 200 is arranged on the light emitting side of the active display screen 100, the electronic ink screen 200 comprises an electronic ink layer 230, a plurality of first electrode groups 210 and a plurality of second electrode groups 220, and each first electrode group 210 and each second electrode group 220 are arranged at intervals in a plane parallel to the active display screen 100; the orthographic projection of each first electrode group 210 on the active display screen 100 is located in the non-display area 101, and the orthographic projection of each second electrode group 220 on the active display screen 100 is located in the display area 102. In this embodiment, through above-mentioned structure, realized a better, the higher display module assembly of overall resolution of display effect.

In one embodiment, with reference to fig. 1, the first electrode group 210 includes a first upper electrode layer 211 and a first lower electrode layer 212, which are oppositely disposed, that is, the first lower electrode layer 212, the electronic ink layer 230, and the first upper electrode layer 211 are sequentially stacked, and when the first lower electrode layer 212 is closer to the active display 100, the first upper electrode layer 211 is farther from the active display 100. Preferably, the first upper electrode layer 211 and the first lower electrode layer 212 have the same size, and the projections of the first upper electrode layer 211 and the first lower electrode layer 212 in the thickness direction of the electronic ink screen 200 completely overlap, so that the state of the electronic ink layer 230 in the sandwiched region can be accurately controlled by the smaller sizes of the first upper electrode layer 211 and the first lower electrode layer 212, and the electronic ink screen 200 can display a target picture.

The second electrode group 220 includes a second upper electrode layer 221 and a second lower electrode layer 222 which are oppositely disposed, wherein the first upper electrode layer 211, the first lower electrode layer 212, the second upper electrode layer 221 and the second lower electrode layer 222 may have the same size, and projections of the second upper electrode layer 221 and the second lower electrode layer 222 in the thickness direction of the electronic ink screen 200 are also completely overlapped, so that the electronic ink screen 200 with uniform pixel size and uniform pixel distribution is realized. It is understood that in other embodiments, a specific shape or a specific size of the display pixel may be realized by providing electrode layers with different sizes. Further, the electronic ink layer 230 is sandwiched between the first upper electrode layer 211 and the first lower electrode layer 212, and between the second upper electrode layer 221 and the second lower electrode layer 222, that is, the electronic ink layers 230 of the pixels are penetrated to form a complete film structure. It can be understood that, with the above structure, the complete electronic ink layer 230 can be formed in a one-time preparation manner on the premise of not affecting the display effect of the electronic ink screen 200, and the electronic ink pixels are directly defined by the electrode structures arranged at intervals, so that the preparation difficulty of the electronic ink screen 200 can be reduced.

Further, the first upper electrode layer 211 and the second upper electrode layer 221 may be both transparent electrodes, such as Indium Tin Oxide (ITO), metal mesh, silver nanowires, etc., and by providing the transparent upper electrodes, the display brightness of the electronic ink screen 200 may be improved and the aperture ratio may be improved, thereby providing the electronic ink screen 200 with better display quality. Still further, the first lower electrode layer 212 and the second lower electrode layer 222 may also be transparent electrodes, such as Indium Tin Oxide (ITO), metal grids, silver nanowires, etc., and by providing the transparent lower electrodes, the proportion of light emitted by the active display screen 100 that is absorbed or reflected by the electronic ink screen 200 may be reduced, so as to reduce the influence of the electronic ink screen 200 on the light emitted by the active display screen 100, thereby providing a display module with better display quality.

In one embodiment, ink particles of multiple colors may be disposed in the electronic ink layer 230, and each color of ink particles may carry charges with different quantities and different conductivities, so that by controlling the voltages applied to the first lower electrode layer 212 and the first upper electrode layer 211, the electric field between the two electrodes is controlled, thereby controlling the movement of the ink particles in the electronic ink layer 230, and displaying the target picture of the corresponding color.

In one embodiment, the electronic ink screen 200 may further have a color filter formed thereon. Specifically, the color filter is disposed on a surface of the first upper electrode layer 211 on a side away from the electronic ink layer 230, and a surface of the second upper electrode layer 221 on a side away from the electronic ink layer 230. By arranging the color filter, the electronic ink screen 200 can realize the display of three primary colors of red, green and blue, thereby realizing the color display of the electronic ink screen 200. Further, the display color of three adjacent electronic ink pixels can be adjusted, so that the electronic ink screen 200 can display a picture with richer colors.

Alternatively, the electronic ink layer 230 may be formed between the first lower electrode layer 212 and the first upper electrode layer 211, and between the second lower electrode layer 222 and the second upper electrode layer 221 using a coating or a potting process. Further, the electronic ink screen 200 further includes two pieces of encapsulation glass (not shown), the encapsulation glass is disposed parallel to the electronic ink screen 200, and is encapsulated by an encapsulation adhesive or the like to form a closed cavity structure, so as to accommodate the plurality of first electrode groups 210, the plurality of second electrode groups 220, and the electronic ink layer 230, thereby preventing the influence of environmental factors on the electronic ink screen 200, and ensuring the reliability of the electronic ink screen 200.

Fig. 3 is a second schematic cross-sectional view of the display module according to an embodiment, referring to fig. 3, a distance between the first upper electrode layer 211 and the first lower electrode layer 212 is greater than a distance between the second upper electrode layer 221 and the second lower electrode layer 222. Specifically, the area corresponding to the second electrode group 220 is the non-display area 101, but the non-display area 101 is not used for displaying and generally has structures such as circuit traces, and taking the circuit traces made of metal as an example, the circuit traces in the non-display area 101 may have phenomena such as light reflection, thereby affecting the display quality of the display module. In the present embodiment, the liquid electronic ink material is automatically filled in the closed cavity formed by the packaging glass, and the electrode layer is usually disposed on the packaging glass, i.e. the distance between the two electrode layers can directly determine the thickness of the electronic ink layer 230 sandwiched therebetween. Therefore, by setting the distance between the first upper electrode layer 211 and the first lower electrode layer 212 and the distance between the second upper electrode layer 221 and the second lower electrode layer 222, the electronic ink layer 230 with a corresponding thickness can be formed, and by setting the electronic ink layer 230 with a larger thickness in the area corresponding to the non-display area 101, the electronic ink layer 230 can have a stronger shielding effect in the non-display area 101, thereby avoiding the light leakage and light reflection problems of the non-display area 101, and further improving the display quality of the display module.

With continued reference to fig. 1, the distance between the first upper electrode layer 211 and the first lower electrode layer 212 may also be equal to the distance between the second upper electrode layer 221 and the second lower electrode layer 222. Specifically, based on the above structure, the first lower electrode layer 212 and the second lower electrode layer 222 can be prepared by the same process, and the first upper electrode layer 211 and the second upper electrode layer 221 can also be prepared by the same process, so that the number of process steps can be greatly reduced, the preparation period can be shortened, the material loss in the preparation process can be reduced, and the preparation cost can be reduced.

Based on the display module shown in fig. 1 and 3, the first electrode set 210 may be configured to apply a first preset signal to the electronic ink layer 230 to control the electronic ink layer 230, which is orthographically projected in the non-display area 101, to be displayed as black, and control the electronic ink layer 230, which is orthographically projected in the display area 102, to be displayed as transparent. Specifically, when the display driver chip controls the active display screen 100 to display the target image, the display driver chip also generates a first preset signal and transmits the first preset signal to the first electrode group 210. The target screen may be, but is not limited to, an interface screen of each software in the display device, and the active display screen 100 is generally used to display a target screen with a high refresh rate, such as a game screen, a chat screen, a video screen, and the like.

Illustratively, taking the example that the black charged particles are negatively charged and the white charged particles are positively charged, the first preset signal includes a positive voltage transmitted to the first upper electrode layer 211 and a negative voltage transmitted to the first lower electrode layer 212. Based on the first preset signal, the black charged particles in the non-display area 101 move upward, and the white charged particles move downward, so that the electronic ink layer 230 of the orthographic projection located in the non-display area 101 is displayed as black, and the first electrode group 210 can attract the charged particles of the electronic ink layer 230 of the orthographic projection located in the display area 102 to move in a direction parallel to the electronic ink screen 200 and stabilize near the first electrode group 210, thereby greatly reducing the charged particles of the electronic ink layer 230 of the orthographic projection located in the display area 102, so that the electronic ink layer 230 of the area is displayed as transparent, avoiding blocking the display area 102 of the active display screen 100, and improving the display quality of the active display screen 100.

In one embodiment, the first electrode set 210 and the second electrode set 220 are further configured to apply a second preset signal to the electronic ink layer 230, so as to control the electronic ink screen 200 to display a target frame corresponding to the second preset signal. The electronic ink screen 200 is generally used to display a target screen with a low refresh rate, such as an electronic book screen. Specifically, when the display driving chip controls the electronic ink panel 200 to display the target image, the display driving chip generates a second preset signal corresponding to the target image, where the second preset signal is a signal group including signals transmitted to each first electrode group 210 and each second electrode group 220, and each first electrode group 210 and each second electrode group 220 may respectively control corresponding electronic ink pixels to display a desired color based on the second preset signal, so that a plurality of electronic ink pixels are commonly used to display one target image. Further, when the electronic ink screen 200 is used to display a target image, the active display screen 100 may be further used to display a background image under the control of the display driver chip, so as to enrich the display effect, where the background image may be a pure color image with uniform brightness and uniform color, for example, a kraft paper color image or a light green image, so as to achieve a certain eye protection effect.

Fig. 4 is a third cross-sectional view of a display module according to an embodiment, referring to fig. 4, in the present embodiment, the active display panel 100 is a liquid crystal panel, and specifically includes a backlight assembly 110, a liquid crystal device 120, a color resist layer 130, and a light shielding layer.

The liquid crystal device 120 is disposed on the light emitting side of the backlight assembly 110, and includes a pixel electrode layer 121, a liquid crystal layer 122, and a common electrode layer 123 stacked on top of each other. The pixel electrode layer 121 is disposed in the display region 102, and includes a plurality of pixel electrodes spaced apart from each other, and the spaced pixel electrodes are used to define different liquid crystal sub-pixels. For example, taking the example that three sub-pixels in fig. 2 constitute one display pixel together, one pixel electrode layer 121 may include three pixel electrodes spaced apart from each other. The liquid crystal layer 122 includes a plurality of liquid crystal molecules that can be rotated by a voltage difference between the pixel electrode layer 121 and the common electrode layer 123, thereby changing the transmittance of the liquid crystal device 120. The color resistance layer 130 is disposed in the display area 102 on the light-emitting side surface of the liquid crystal device 120, and includes a plurality of color resistance blocks spaced apart from each other, the plurality of color resistance blocks are respectively disposed in a one-to-one correspondence with the plurality of pixel electrodes in a first direction, the first direction is the thickness direction of the active display screen 100, and the color resistance blocks are configured to filter the white light from the liquid crystal device 120, so that each sub-pixel in the same display pixel displays different colors, thereby realizing rich display colors.

The light shielding layer is arranged in the non-display area 101 on the light emitting side of the liquid crystal device 120 and used for isolating adjacent display pixels and avoiding the phenomenon of light mixing between the adjacent display pixels, so that the display quality and the display effect are improved. Specifically, in one embodiment, the light-shielding layer includes a black matrix 140, and the black matrix 140 is disposed in the non-display region 101 on the light-emitting side surface of the liquid crystal device 120 and filled between the adjacent color resist blocks, wherein the surface of the light-emitting side of the liquid crystal device 120 may be an inner surface or an outer surface. In another embodiment, the portion of the electronic ink screen 200, which is orthographically projected to the non-display area 101, is also used as the light shielding layer, and it can be understood that based on the structure of this embodiment, the conventional black matrix 140 is not required to be disposed, and the problem of light mixing between adjacent pixels can still be avoided, so that the manufacturing process of the active display screen 100 is greatly simplified on the premise of not reducing the display quality. Further, when the thickness of the electronic ink layer 230 in the non-display area 101 in the orthographic projection is greater than a thickness threshold, the thickness threshold may be 3mm, for example, and may be used as a light shielding layer.

Fig. 5 is a fourth cross-sectional view of a display module according to an embodiment, referring to fig. 5, in the embodiment, the active display panel 100 includes a circuit trace (not shown) and a plurality of active light emitting devices 150 spaced apart from each other.

The active light emitting devices 150 are disposed in the display area 102, and the circuit traces are disposed in the non-display area 101, and are respectively connected to the plurality of active light emitting devices 150, so as to transmit a third preset signal to each of the active light emitting devices 150, so as to control the active display screen 100 to display a target picture corresponding to the third preset signal. Specifically, the active light emitting device 150 includes, but is not limited to, an organic light emitting device, an inorganic light emitting device, and a Micro-LED device. It can be understood that the display module of this embodiment is similar to the embodiment of fig. 4 in display manner, and the description thereof is omitted here. In the embodiment, the active light emitting device 150 does not need backlight driving, and the displayed color saturation is better, so that, by combining with the active display screen 100, the embodiment can realize a display module with higher display resolution, better display quality, and lighter and thinner.

The embodiment of the application also provides a display device, which comprises the display module. Specifically, the display device includes, but is not limited to, a display, a tablet computer, a mobile phone, a smart wearable device, and the like. Based on aforementioned display module assembly, this embodiment provides one kind and has the double screen display function, and shows the higher display device of resolution ratio.

The embodiment of the application further provides a control method of the display module, which is applied to a display driving chip, wherein the display driving chip is respectively connected with the active display screen 100 and the electronic ink screen 200, and is used for generating a driving signal according to a target picture to be displayed, and sending the generated driving signal to the active display screen 100 and the electronic ink screen 200, and after the electrodes of the active display screen 100 and the electronic ink screen 200 receive the driving signal, the target picture can be displayed under the driving of the driving signal. Specifically, the display module provided in the embodiment of fig. 4 is taken as an example for description. The display driver chip is configured with an active display mode and an electronic ink mode.

When the active display mode is adopted, the display driver chip outputs a first predetermined signal to transmit a positive voltage to the first upper electrode layer 211 and not to transmit a voltage to the other electrode layers, so that the electronic ink screen 200 in the area corresponding to the non-display area 101 is displayed as black, and the electronic ink screen 200 in the area corresponding to the display area 102 is displayed as transparent.

When the electronic ink mode is adopted, taking the display text as an example for explanation, the driving chip is further configured with a black matrix white character mode with backlight, a black matrix white character mode without backlight, a white matrix black character mode with backlight and a white matrix black character mode without backlight. The mode with backlight can be applied to low-brightness environment, such as indoor environment at night, and the mode without backlight can be applied to high-brightness environment, such as outdoor environment with stronger illumination, so that the application scene of the display module in the embodiment is effectively expanded.

When the black-and-white-background mode is adopted, the liquid crystal display is controlled to display a pure-and-white picture, the display driving chip generates a second preset signal according to a target picture to be displayed, so that a negative voltage is transmitted to the first upper electrode layer 211 corresponding to an area to be displayed as white, a positive voltage is transmitted to the second upper electrode layer 221, and no voltage is transmitted to the first lower electrode layer 212 and the second lower electrode layer 222, so as to shield a part of the backlight, so that the electronic ink screen 200 displays the black-and-white-background picture. When the black-and-white-matrix mode without backlight is adopted, the liquid crystal screen is turned off, and the display driving chip generates a second preset signal according to a target picture to be displayed, so that a negative voltage is transmitted to the first upper electrode layer 211 and the second upper electrode layer 221 corresponding to the area to be displayed as white, and a positive voltage is transmitted to the first lower electrode layer 212, so that the black charged particles are prevented from being unevenly distributed, and the electronic ink screen 200 can display the black-and-white-matrix. When the white-background black-character mode with backlight is adopted, the liquid crystal display is controlled to display a pure white image, the display driving chip generates a second preset signal according to a target image required to be displayed, so that a positive voltage is transmitted to the first upper electrode layer 211 and the second upper electrode layer 221 corresponding to an area required to be displayed as black, a negative voltage is transmitted to the first lower electrode layer 212, uneven distribution of black charged particles is avoided, no voltage is transmitted to the second lower electrode layer 222, and the electronic ink screen 200 displays white-background black characters. When the white-background black-character mode without backlight is adopted, the liquid crystal screen is turned off, and the display driving chip generates a second preset signal according to a target picture to be displayed, so that a positive voltage is transmitted to the first upper electrode layer 211 and the second upper electrode layer 221 corresponding to the area needing to be displayed as black, and a negative voltage is transmitted to the remaining first upper electrode layer 211 and the remaining second upper electrode layer 221, so that the electronic ink screen 200 displays white-background black characters.

Furthermore, in the backlight mode, the liquid crystal display can be controlled to display pure-color pictures with other colors, so that the display effect is enriched. The control method based on the display module can learn that the display module can achieve the display function of high resolution and multiple application scenes.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express a few embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the concept of the embodiments of the present application, and these embodiments are within the scope of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the appended claims.

Claims (11)

1. A display module, comprising:

the active display screen comprises a display area and a non-display area;

the electronic ink screen is arranged on the light emitting side of the active display screen and comprises an electronic ink layer, a plurality of first electrode groups and a plurality of second electrode groups, and the first electrode groups and the second electrode groups are arranged in a plane parallel to the active display screen at intervals;

the orthographic projection of each first electrode group on the active display screen is located in the non-display area, and the orthographic projection of each second electrode group on the active display screen is located in the display area.

2. The display module of claim 1, wherein the first electrode set comprises a first upper electrode layer and a first lower electrode layer disposed opposite to each other, and the second electrode set comprises a second upper electrode layer and a second lower electrode layer disposed opposite to each other;

the electronic ink layer is sandwiched between the first upper electrode layer and the first lower electrode layer, and sandwiched between the second upper electrode layer and the second lower electrode layer.

3. The display module according to claim 2, wherein a distance between the first upper electrode layer and the first lower electrode layer is greater than a distance between the second upper electrode layer and the second lower electrode layer.

4. The display module according to claim 2, wherein a distance between the first upper electrode layer and the first lower electrode layer is equal to a distance between the second upper electrode layer and the second lower electrode layer.

5. The display module according to claim 3 or 4, wherein the first electrode set is configured to apply a first predetermined signal to the electronic ink layer to control the electronic ink layer in the non-display area to display black in the front projection mode, and to control the electronic ink layer in the display area to display transparent in the front projection mode.

6. The display module according to claim 3 or 4, wherein the first electrode set and the second electrode set are further configured to apply a second preset signal to the electronic ink layer to control the electronic ink screen to display a target image corresponding to the second preset signal.

7. The display module of claim 1, wherein the active display screen comprises:

the liquid crystal device comprises a pixel electrode layer, a liquid crystal layer and a common electrode layer which are arranged in a stacked mode, wherein the pixel electrode layer is arranged in the display area and comprises a plurality of pixel electrodes which are spaced from one another;

the color resistance layer is arranged in a display area on the light-emitting side surface of the liquid crystal device and comprises a plurality of color resistance blocks which are spaced from each other, the plurality of color resistance blocks are respectively arranged in one-to-one correspondence with the plurality of pixel electrodes in a first direction, and the first direction is the thickness direction of the active display screen;

and the shading layer is arranged in the non-display area on the light-emitting side of the liquid crystal device.

8. The display module as claimed in claim 7, wherein the light-shielding layer comprises a black matrix disposed in the non-display region on the light-emitting surface of the liquid crystal device and filled between the adjacent color resist blocks.

9. The display module of claim 7, wherein the portion of the electronic ink screen that is orthographically projected in the non-display area also serves as the light-shielding layer.

10. The display module of claim 1, wherein the active display screen comprises:

a plurality of active light emitting devices spaced from each other and disposed in the display region;

and the circuit wiring is arranged in the non-display area, is respectively connected with the plurality of active light-emitting devices and is used for transmitting a third preset signal to each active light-emitting device so as to control the active display screen to display a target picture corresponding to the third preset signal.

11. A display device comprising a display module according to any one of claims 1 to 10.

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