CN212781586U - Dual display module and dual display device - Google Patents

Abstract

The embodiment of the utility model discloses dual display module assembly and dual display device. The liquid crystal panel of the dual display module comprises a first sub-pixel unit group and a second sub-pixel unit group; the upper polaroid comprises a plurality of first upper polaroids and a plurality of second upper polaroids, and the lower polaroid comprises a plurality of first lower polaroids and a plurality of second lower polaroids; the vertical projections of the first upper polaroid and the first lower polaroid on the plane of the liquid crystal panel are at least partially overlapped with the sub-pixel units in the first sub-pixel unit group; the vertical projections of the second upper polarizer and the second lower polarizer on the plane of the liquid crystal panel are at least partially overlapped with the sub-pixel units in the second sub-pixel unit group; the transmission axes of the first upper polarizer and the second lower polarizer are vertical to the transmission axes of the second upper polarizer and the first lower polarizer. The embodiment of the utility model provides an usable first sub-pixel unit group and second sub-pixel unit group form independent picture respectively, guarantee two pictures mutually noninterference.

Description

Dual display module and dual display device

Technical Field

The embodiment of the utility model provides a relate to and show technical field, especially relate to a dual display module assembly and dual display device.

Background

Liquid Crystal Display (LCD) devices have many advantages such as being light and thin, saving energy, and having no radiation, and thus have gradually replaced conventional Cathode Ray Tube (CRT) displays. Liquid crystal displays are widely used in high definition digital televisions, desktop computers, Personal Digital Assistants (PDAs), notebook computers, mobile phones, digital cameras, and other electronic devices.

However, in the conventional display device, the display mode of the display panel is mostly single-screen display. When a plurality of people want to watch different display screens on the same display device, multi-screen display can be realized only in a split screen or picture-in-picture mode. The display mode limits the display size of the picture and influences the display effect of the two display pictures in the display panel to a certain extent.

SUMMERY OF THE UTILITY MODEL

The utility model provides a dual display module assembly and dual display device to realize two pictures of simultaneous display in same display panel, and guarantee that two display pictures do not interfere with each other.

In a first aspect, an embodiment of the present invention provides a dual display module, including a backlight module and a liquid crystal panel, where the liquid crystal panel is disposed on a light emitting side of the backlight module, the liquid crystal panel includes a plurality of first sub-pixel unit groups and a plurality of second sub-pixel unit groups, each of the first sub-pixel unit groups and the second sub-pixel unit groups includes a plurality of sub-pixel units, and the sub-pixel units in the first sub-pixel unit groups and the second sub-pixel unit groups are uniformly distributed in a cross manner;

the dual display module further comprises an upper polarizer and a lower polarizer, the upper polarizer is positioned on the light emergent side of the liquid crystal panel, and the lower polarizer is positioned between the backlight module and the liquid crystal panel;

the upper polaroid comprises a plurality of first upper polaroids and a plurality of second upper polaroids, and the lower polaroid comprises a plurality of first lower polaroids and a plurality of second lower polaroids; the vertical projections of the first upper polaroid and the first lower polaroid on the plane of the liquid crystal panel are at least partially overlapped with the sub-pixel units in the first sub-pixel unit group; the vertical projections of the second upper polarizer and the second lower polarizer on the plane of the liquid crystal panel are at least partially overlapped with the sub-pixel units in the second sub-pixel unit group;

the transmission axes of the first upper polarizer and the second lower polarizer extend along a first direction, the transmission axes of the second upper polarizer and the first lower polarizer extend along a second direction, and the first direction is perpendicular to the second direction.

Further, the backlight module comprises a backlight polarizer and a plurality of backlight light sources, wherein the backlight polarizer is positioned at the light emergent side of the plurality of backlight light sources; the plurality of backlight light sources comprise a first backlight light source group and a second backlight light source group;

the backlight polaroids comprise a plurality of first backlight polaroids and a plurality of second backlight polaroids, and the vertical projection of the first backlight polaroids on the plane where the backlight light sources are located is at least partially overlapped with the backlight light sources in the first backlight light source group; the vertical projection of the second backlight polaroid on the plane where the backlight light source is located is at least partially overlapped with the backlight light source in the second backlight light source group;

the transmission axis of the first backlight polaroid extends along the first direction, and the transmission axis of the second backlight polaroid extends along the second direction.

Further, the liquid crystal panel sequentially comprises a first substrate, a liquid crystal layer and a second substrate along a light emitting direction, wherein the liquid crystal layer comprises liquid crystal molecules; a first alignment layer is arranged on the surface of one side, facing the liquid crystal layer, of the first substrate; a second alignment layer is arranged on the surface of one side, facing the liquid crystal layer, of the second substrate;

an alignment direction of the first alignment layer in the sub-pixel cells of the first sub-pixel cell group is perpendicular to an alignment direction of the first alignment layer in the sub-pixel cells of the second sub-pixel cell group; an alignment direction of the second alignment layer in the sub-pixel unit of the first sub-pixel unit group is perpendicular to an alignment direction of the second alignment layer in the sub-pixel unit of the second sub-pixel unit group.

Further, the sub-pixel units in the first sub-pixel unit group and the second sub-pixel unit group are alternately arranged in sequence in both the first direction and the second direction;

or, each of the first and second sub-pixel unit groups includes a plurality of sub-pixel unit columns extending along the first direction or the second direction, and the sub-pixel unit columns in the first and second sub-pixel unit groups are alternately arranged in sequence along the second direction or the first direction.

Furthermore, the backlight module is a direct type backlight module;

the backlight light sources in the first backlight light source group and the second backlight light source group are sequentially and alternately arranged in the first direction and the second direction; or, each of the first backlight light source group and the second backlight light source group includes a plurality of backlight light source columns extending along the first direction or the second direction, and the backlight light source columns in the first backlight light source group and the second backlight light source group are alternately arranged along the second direction or the first direction in sequence.

Furthermore, the backlight module further comprises a light guide plate, the light guide plate is positioned on the light emergent side of the backlight polarizer, and the vertical projection of the light guide plate on the plane where the backlight light source is positioned covers the area where the backlight light source is positioned.

Furthermore, the backlight module is a side-in type backlight module, the backlight module comprises a light guide plate, and the light incident surface and the light emergent surface of the light guide plate are adjacent;

the backlight source and the backlight polaroid are positioned on one side of the light incident surface of the light guide plate, and the liquid crystal panel is positioned on one side of the light emergent surface of the light guide plate.

Further, the backlight light source comprises a mini-LED, a micro-LED or an LED.

Furthermore, a pixel driving circuit layer is arranged on one side, facing the liquid crystal layer, of the first substrate, and a colored resist layer is arranged on the second substrate;

the pixel driving circuit layer comprises pixel driving circuits which correspond to the sub-pixel units one by one; the color resistance layer comprises color resistances corresponding to the sub-pixel units one to one.

In a second aspect, the embodiment of the present invention further provides a dual display device, which includes the dual display module set as in any one of the first aspect.

The embodiment of the utility model provides a dual display module and dual display device, through set up backlight unit and liquid crystal display panel in the reality module, liquid crystal display panel sets up the light-emitting side at backlight unit, and liquid crystal display panel includes a plurality of sub pixel units that the array was arranged, and a plurality of sub pixel units include first sub pixel unit group and second sub pixel unit group, and the sub pixel unit in first sub pixel unit group and the second sub pixel unit group is even cross distribution; the liquid crystal display panel further comprises an upper polarizer and a lower polarizer, wherein the upper polarizer comprises a plurality of first upper polarizers and a plurality of second upper polarizers, the lower polarizer comprises a plurality of first lower polarizers and a plurality of second lower polarizers, the first upper polarizers and the first lower polarizers respectively vertically project on the plane of the liquid crystal panel and are at least partially overlapped with the sub-pixel units in the first sub-pixel unit group, and the second upper polarizers and the second lower polarizers respectively vertically project on the plane of the liquid crystal panel and are at least partially overlapped with the sub-pixel units in the second sub-pixel; the transmission axis of the first upper polarizer and the second lower polarizer extends along the first direction, the transmission axis of the second upper polarizer and the first lower polarizer extends along the second direction, the first direction and the second direction are mutually perpendicular, so that the emergent light of the sub-pixel units in the first sub-pixel unit group and the second sub-pixel unit group is linearly polarized light, the polarization directions are mutually perpendicular, the display pictures can be respectively and independently formed by utilizing the first sub-pixel unit group and the second sub-pixel unit group, two display pictures can be respectively observed by adopting corresponding polarized lenses, and the two pictures are mutually not interfered.

Drawings

Fig. 1 is a schematic structural diagram of a dual display module according to an embodiment of the present invention;

FIG. 2 is a top view of the dual display module of FIG. 1;

FIG. 3 is a top view of the backlight module of the dual display module shown in FIG. 1;

fig. 4 is a schematic structural diagram of another dual display module according to an embodiment of the present invention

Fig. 5 is a schematic structural diagram of another dual display module according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another dual display module according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a backlight module of another dual display module according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another dual display module according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a dual display device according to an embodiment of the present invention.

Wherein, 1-double display module, 10-backlight module, 11-backlight polarizer, 111-first backlight polarizer, 112-second backlight polarizer, 12-backlight source, 121-first backlight source group, 122-second backlight source group, 120-backlight light source row, 20-liquid crystal panel, 21-sub-pixel unit, 210-sub-pixel unit row, 211-first sub-pixel unit group, 212-second sub-pixel unit group, 22-upper polarizer, 221-first upper polarizer, 222-second upper polarizer, 23-lower polarizer, 231-first lower polarizer, 232-second lower polarizer, 241-first substrate, 242-second substrate, 243-liquid crystal layer, 2430-liquid crystal molecule, 100-first direction, 200-second direction.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a dual display module according to an embodiment of the present invention, fig. 2 is a top view of the dual display module shown in fig. 1, fig. 3 is a top view of a backlight module in the dual display module shown in fig. 1, referring to fig. 1 to fig. 3, the dual display module includes a backlight module 10 and a liquid crystal panel 20, the liquid crystal panel 20 is disposed on a light emitting side of the backlight module 10, the liquid crystal panel 20 includes a plurality of first sub-pixel unit groups 211 and a plurality of second sub-pixel unit groups 212, and the first sub-pixel unit groups 211 and the second sub-pixel unit groups 212 both include a plurality of sub-pixel units 21, and sub-pixel units 21 in the first sub-pixel unit groups 211 and the second sub-pixel unit groups 212 are uniformly distributed in a crossing manner.

The dual display module further includes an upper polarizer 22 and a lower polarizer 23, the upper polarizer 22 is located on the light emitting side of the liquid crystal panel 20, and the lower polarizer 23 is located between the backlight module 10 and the liquid crystal panel 20.

The upper polarizer 22 includes a plurality of first upper polarizers 221 and a plurality of second upper polarizers 222, and the lower polarizer 23 includes a plurality of first lower polarizers 231 and a plurality of second lower polarizers 232; the vertical projections of the first upper polarizer 221 and the first lower polarizer 231 respectively formed on the plane of the liquid crystal panel 20 at least partially overlap with the sub-pixel units 21 in the first sub-pixel unit group 211; the vertical projections of the second upper polarizer 222 and the second lower polarizer 232 on the plane of the liquid crystal panel 20 at least partially overlap with the sub-pixel units 21 in the second sub-pixel unit group 212.

The transmission axes of the first upper polarizer 221 and the second lower polarizer 232 extend in a first direction 100, the transmission axes of the second upper polarizer 222 and the first lower polarizer 231 extend in a second direction 200, and the first direction 100 is perpendicular to the second direction 200.

The sub-pixel unit 21 controls the deflection of the liquid crystal by controlling and driving the electric signal, thereby deflecting the polarization state of the backlight light. The upper and lower sides of the sub-pixel unit 21 are respectively provided with an upper polarizer 22 and a lower polarizer 23, the transmission axes of which are perpendicular to each other, wherein the lower polarizer 23 is used for polarizing the backlight, at this time, the light passing through the lower polarizer 23 is linearly polarized, and then the sub-pixel unit 21 deflects the light, so that the polarized state of the linearly polarized light can be deflected by 90 degrees in the plane where the liquid crystal panel is located, and the linearly polarized light can be emitted through the upper polarizer 22, and the sub-pixel unit 21 emits light in a bright state. When the sub-pixel unit 21 does not deflect the light, the linearly polarized light is not emitted because the polarization state is perpendicular to the polarization direction of the upper polarizer 22, so that the sub-pixel unit 21 is in a dark state.

The embodiment of the utility model provides an among the dual display module, liquid crystal display panel 20's subpixel unit 21 divide into first subpixel unit group 211 and second subpixel unit group 212, the income light side of first subpixel unit group 211 and second subpixel unit group 212 corresponds respectively and sets up first polaroid 231 and second polaroid 232 down, the light-emitting side corresponds respectively and sets up first polaroid 221 and second polaroid 222 on, the transmission axis of polaroid 222 all extends along first direction 100 on first polaroid 231 and the second, and the transmission axis of polaroid 221 extends along second direction 200 on second polaroid 232 and the first polaroid 221 down, first direction 100 and second direction 200 mutually perpendicular, the essence means, subpixel unit 21 in first subpixel unit group 211 and the second subpixel unit group 212, the transmission axis of polaroid 222 is perpendicular on corresponding first polaroid 221 and the second polaroid. At this time, the polarization states of the linearly polarized light emitted by the sub-pixel cells 21 in the first and second sub-pixel cell groups 211 and 212 are perpendicular to each other. For the same group of sub-pixel units 21, the transmission axes of the lower polarizer 23 disposed on the light incident side and the upper polarizer 22 disposed on the light emergent side are perpendicular to each other, and the sub-pixel units 21 are used to control whether the linear polarization light incident from the lower polarizer is polarized or not, so as to control the emission of the backlight. For example, as shown in fig. 1, the transmission axis of the first upper polarizer 221 corresponding to the first sub-pixel unit group 211 is taken as a parallel direction, and the transmission axis of the second upper polarizer 222 corresponding to the second sub-pixel unit group 212 is taken as a perpendicular direction; meanwhile, the transmission axis of the first lower polarizer 231 corresponding to the first sub-pixel unit group 211 is a vertical direction, and the transmission axis of the second lower polarizer 232 corresponding to the second sub-pixel unit group 212 is a parallel direction. As can be seen from this, the sub-pixel cells 21 in the first sub-pixel cell group 211 and the second sub-pixel cell group 212 are individually driven and controlled to be turned on or off, so that the first sub-pixel cell group 211 and the second sub-pixel cell group 212 can respectively display images.

It should be noted that, because the light beams emitted by the sub-pixel units in the first sub-pixel unit group 211 and the second sub-pixel unit group 212 are linearly polarized light, and the polarization directions of the linearly polarized light are perpendicular to each other, in order to independently view the picture displayed by the sub-pixel unit in the first sub-pixel unit group, the light beams need to be filtered by using a polarized lens. Taking the display image of the first sub-pixel unit group as an example, the transmission axis of the polarized lens should be the same as the transmission axis of the first upper polarizer 221, and the linearly polarized light emitted by the first sub-pixel unit group 211 can be transmitted, and the linearly polarized light emitted by the second sub-pixel unit group 212 can be blocked.

In addition, it should be noted that in order to ensure that the first sub-pixel unit group 211 and the second sub-pixel unit group 212 achieve uniform image display, and the display image tiles the whole display module, it is necessary to set the sub-pixel units 21 in the first sub-pixel unit group 211 and the second sub-pixel unit group 212 to be uniformly distributed in a crossing manner. Moreover, in order to ensure that the sub-pixel units 21 can be combined to form a color display screen after being turned on, in the sub-pixel units of the same group, adjacent sub-pixel units should be set to different colors, such as three primary colors of red, green and blue, so as to form a full-color screen by using the sub-pixel units of three colors in color matching.

The embodiment of the utility model provides a dual display module, through setting up backlight unit and liquid crystal display panel, liquid crystal display panel sets up the light-emitting side at backlight unit, and liquid crystal display panel includes a plurality of first sub-pixel unit groups and a plurality of second sub-pixel unit group, first sub-pixel unit group and the second sub-pixel unit group all include a plurality of sub-pixel units, the sub-pixel unit in first sub-pixel unit group and the second sub-pixel unit group is even cross distribution; the liquid crystal display panel further comprises an upper polarizer and a lower polarizer, wherein the upper polarizer comprises a plurality of first upper polarizers and a plurality of second upper polarizers, the lower polarizer comprises a plurality of first lower polarizers and a plurality of second lower polarizers, the first upper polarizers and the first lower polarizers respectively vertically project on the plane of the liquid crystal panel and are at least partially overlapped with the sub-pixel units in the first sub-pixel unit group, and the second upper polarizers and the second lower polarizers respectively vertically project on the plane of the liquid crystal panel and are at least partially overlapped with the sub-pixel units in the second sub-pixel; the transmission axis of the first upper polarizer and the second lower polarizer extends along the first direction, the transmission axis of the second upper polarizer and the first lower polarizer extends along the second direction, the first direction and the second direction are mutually perpendicular, so that the emergent light of the sub-pixel units in the first sub-pixel unit group and the second sub-pixel unit group is linearly polarized light, the polarization directions are mutually perpendicular, the display pictures can be respectively and independently formed by utilizing the first sub-pixel unit group and the second sub-pixel unit group, two display pictures can be respectively observed by adopting corresponding polarized lenses, and the two pictures are mutually not interfered.

With continuing reference to fig. 1-3, further optionally, the backlight module 10 includes a backlight polarizer 11 and a plurality of backlight light sources 12, where the backlight polarizer 11 is located at a light emitting side of the plurality of backlight light sources 12; the plurality of backlight light sources 12 includes a first backlight light source group 121 and a second backlight light source group 122; the backlight polarizer 11 includes a plurality of first backlight polarizers 111 and a plurality of second backlight polarizers 112, and a vertical projection of the first backlight polarizer 111 on a plane where the backlight light sources 12 are located at least partially overlaps with the backlight light sources 12 in the first backlight light source group 121; the vertical projection of the second backlight polarizer 112 on the plane of the backlight light sources 12 at least partially overlaps the backlight light sources 12 in the second backlight light source group 122; the transmission axis of the first backlight polarizer 111 extends along a first direction 100, and the transmission axis of the second backlight polarizer 112 extends along a second direction 200.

At this time, the backlight emitted from the backlight module 10 includes two polarized lights, the polarized directions of the two lights are the first direction 100 and the second direction 200, and obviously, for the lower polarizer 23 disposed between the backlight module 10 and the liquid crystal panel 20, the first lower polarizer 231 and the second lower polarizer 232 only transmit the linearly polarized backlight light consistent with the transmission axis direction thereof. Therefore, the backlight emitted from the backlight module 10 has no light in other polarization states, and the backlight incident through the lower polarizer 23 only includes two linearly polarized lights, one linearly polarized light can transmit through the lower polarizer 23, and the other linearly polarized light can be blocked. In other words, the light emitted from the backlight source 12 will pass through the two layers of the backlight polarizer and the lower polarizer for filtering, and the backlight light will not have other stray light when passing through the liquid crystal panel 20, and the sub-pixel unit 21 in the dark state can maintain a more pure dark state, thereby improving the contrast of the dual display image and improving the display effect of the dual display.

In the dual display module provided in the above embodiment, the sub-pixel units of the liquid crystal panel substantially utilize the control of the liquid crystal molecular orientation to realize the deflection of the light, so as to realize the switching between the dark state and the bright state of the sub-pixel units. Based on this, it can be understood that, for the sub-pixel cells in the first sub-pixel cell group and the second sub-pixel cell group, which can be provided with the same internal structure, the display of the double screen is realized by controlling the orientation of the liquid crystal molecules therein. Of course, considering that there is a certain relationship between the driving process of the actual liquid crystal molecules and the internal structure of the sub-pixel unit, the embodiment of the present invention is directed to this, and provides another dual display module.

Fig. 4 is a schematic structural diagram of another dual display module according to an embodiment of the present invention, referring to fig. 4, the liquid crystal panel sequentially includes a first substrate 241, a liquid crystal layer 243 and a second substrate 242 along a light emitting direction, the liquid crystal layer 243 includes liquid crystal molecules 2430; a first alignment layer 244 is disposed on a surface of the first substrate 241 facing the liquid crystal layer 243; a surface of the second substrate 242 facing the liquid crystal layer 243 is provided with a second alignment layer 245.

The alignment direction of the first alignment layer 244 in the sub-pixel unit 21 of the first sub-pixel unit group 211 is perpendicular to the alignment direction of the first alignment layer 244 in the sub-pixel unit 21 of the second sub-pixel unit group 212; the alignment direction of the second alignment layer 245 in the sub-pixel unit 21 of the first sub-pixel unit group 211 is perpendicular to the alignment direction of the second alignment layer 245 in the sub-pixel unit 21 of the second sub-pixel unit group 212.

As shown, for example, in the sub-pixel unit 21 of the first sub-pixel unit group 211, the alignment direction of the first alignment layer 244 is the second direction 200, and the alignment direction of the second alignment layer 245 is the first direction 100; in the sub-pixel unit 21 of the second sub-pixel unit group 212, the alignment direction of the first alignment layer 244 is the first direction 100, and the alignment direction of the second alignment layer 245 is the second direction 200.

The orientation direction of the liquid crystal molecules 2430 in the liquid crystal layer 243 is mainly determined by the orientation of an alignment film during the preparation of the liquid crystal panel and the direction of an electric field during driving, and the orientation of the liquid crystal molecules 2430 is matched with the upper and lower polarizers, so that the light transmission gating of the backlight can be realized. The following describes the specific operation principle and process of the display module shown in fig. 4. It is understood that the liquid crystal molecules 2430 are aligned in the same direction as the adjacent alignment film when no electric field is applied. As shown in fig. 4, when no electric field is applied, in the sub-pixel unit 21 of the first sub-pixel unit group 211, the alignment direction of the first alignment layer 244 is the second direction 200, the orientation of the adjacent liquid crystal molecules 2430 is the second direction 200, i.e., the alignment of the transmission axes of the first lower polarizer 231 corresponding to the sub-pixel unit 21 is consistent, and the alignment direction of the second alignment layer 245 is the first direction 100, i.e., the orientation of the adjacent liquid crystal molecules 2430 is the first direction 100, i.e., the alignment of the transmission axes of the first upper polarizer 221 corresponding to the sub-pixel unit 21 is consistent. In other words, in the sub-pixel unit 21 of the first sub-pixel unit group 211, the liquid crystal molecules 2430 are twisted along the light emitting direction according to the alignment directions of the first alignment layer 244 and the second alignment layer 245 in the region, and the twisted liquid crystal molecules 2430 deflect the linearly polarized light transmitted by the first lower polarizer 231, so that the polarization direction thereof is deflected from the second direction 200 to the first direction 100, and then the linearly polarized light is transmitted by the first upper polarizer 221. Therefore, when no electric field is applied, the sub-pixel units 21 of the first sub-pixel unit group 211 are transparent, i.e. in a bright state; by applying an electric field to the sub-pixel unit 21, the liquid crystal molecules 2430 can be driven to change the twisted arrangement state into a parallel arrangement state, and at this time, the liquid crystal molecules 2430 will not deflect the linear polarization light transmitted by the first lower polarizer 231, so that the part of the light is locked in the sub-pixel unit 21 and is in a dark state. Therefore, the first sub-pixel unit group 211 can display a screen by controlling the switching of the sub-pixel units 21 between the bright state and the dark state.

Similarly, for the second sub-pixel unit 212, when no electric field is applied, the liquid crystal molecules in the sub-pixel unit 21 are also twisted and aligned in the first direction 100 because the alignment direction of the first alignment layer 244 in the region is the same as the transmission axis direction of the second lower polarizer 232, and the adjacent liquid crystal molecules 2430 are aligned in the first direction 100; the alignment direction of the second alignment layer 245 in the region is the same as the transmission axis direction of the second upper polarizer 222, and is the second direction 200, so that the adjacent liquid crystal molecules 2430 are oriented in the second direction 200. Obviously, when no electric field is applied, the sub-pixel unit 21 of the second sub-pixel group 212 is in a bright state, and by applying the electric field, the sub-pixel unit 21 of the second sub-pixel group 212 can be controlled to be in a dark state, and by controlling the driving of each sub-pixel unit 21 of the second sub-pixel group 212, the display of the picture can be realized.

It should be noted that, as described above, the first alignment layer 244 is disposed in different alignment directions in the regions of the first sub-pixel group 211 and the second sub-pixel group 212, and the orientations of the transmission axes of the polarizers adjacent to the first alignment layer are the same, so as to control the sub-pixel units 21 in the first sub-pixel group 211 and the second sub-pixel group 212 to be in a bright state when no electric field is applied, and to be in a dark state when an electric field is applied, that is, when the first sub-pixel group 211 and the second sub-pixel group 212 display a picture, the driving principles thereof are the same, and the adjacent sub-pixel units 21 belonging to different groups do not generate mutual interference and influence due to different working principles. In addition, in the driving display principle of the liquid crystal panel in this embodiment, the liquid crystal panel is in a bright state when no electric field is applied and in a dark state when an electric field is applied, so that the liquid crystal panel does not need to be driven to keep the bright state, thereby saving the driving power of the panel during display, reducing power consumption and saving electric energy consumption.

In addition, in addition to the alignment arrangement of the first alignment film and the second alignment film shown in fig. 4, the embodiment of the present invention further provides other alignment modes of the alignment films. Fig. 5 is a schematic structural diagram of another dual display module according to an embodiment of the present invention, referring to fig. 5, the alignment direction of the first alignment layer 244 in the sub-pixel unit 21 of the first sub-pixel unit group 211 is perpendicular to the alignment direction of the first alignment layer 244 in the sub-pixel unit 21 of the second sub-pixel unit group 212; the alignment direction of the second alignment layer 245 in the sub-pixel unit 21 of the first sub-pixel unit group 211 is perpendicular to the alignment direction of the second alignment layer 245 in the sub-pixel unit 21 of the second sub-pixel unit group 212. In the sub-pixel unit 21 of the first sub-pixel unit group 211, the alignment direction of the first alignment layer 244 is the second direction 200, and the alignment direction of the second alignment layer 245 is the second direction 200; in the sub-pixel unit 21 of the second sub-pixel unit group 212, the alignment direction of the first alignment layer 244 is the first direction 100, and the alignment direction of the second alignment layer 245 is the first direction 100.

Specifically, in the sub-pixel unit 21 of the first sub-pixel unit group 211, the liquid crystal molecules 2430 are aligned in parallel along the light emitting direction according to the alignment directions of the first alignment layer 244 and the second alignment layer 245 in the region, and the direction of the liquid crystal molecules 2430 is parallel to the second direction 200. At this time, the linear polarized light transmitted by the first lower polarizer 231 is not deflected, i.e., is not transmitted by the first upper polarizer 221. Under the condition of reasonably arranging the electrodes and applying a proper electric field, the liquid crystal molecules 2430 can be controlled to be arranged in a twisted manner along the light emitting direction, and at this time, the twisted liquid crystal molecules 2430 deflect the linearly polarized light transmitted by the first lower polarizer 231, so that the polarization direction of the linearly polarized light is deflected from the second direction 200 to the first direction 100, and then the linearly polarized light passes through the first upper polarizer 221. In other words, for the first sub-pixel unit group 211, when no electric field is applied, the sub-pixel units 21 of the first sub-pixel unit group 211 do not transmit light, i.e. are in a dark state; by applying an electric field to the sub-pixel unit 21, the liquid crystal molecules 2430 can be driven to change the parallel arrangement state into a twisted arrangement state, and at this time, the liquid crystal molecules 2430 deflect the linear polarization light transmitted by the first lower polarizer 231, so that the part of the light is transmitted through the sub-pixel unit 21 and is in a bright state. Therefore, the first subpixel unit group 211 can display a screen by controlling the switching of each subpixel unit 21 between the dark state and the bright state.

Similarly, for the second sub-pixel unit group 212, when no electric field is applied, the liquid crystal molecules in the sub-pixel unit 21 are also arranged in parallel, and the alignment direction of the second alignment layer 245 is perpendicular to the transmission axis direction of the second upper polarizer 222 in this region. Obviously, when no electric field is applied, the sub-pixel unit 21 of the second sub-pixel group 212 is also in a dark state. By applying an electric field, the sub-pixel unit 21 of the second sub-pixel group 212 can be controlled to be in a bright state, and the display of the picture can be realized by controlling the driving of each sub-pixel unit 21 of the second sub-pixel group 212.

In order to realize picture driving and color matching, those skilled in the art can understand that in the liquid crystal panel of the above embodiment, the first substrate is provided with a pixel driving circuit layer on the side facing the liquid crystal layer, and the second substrate is provided with a colored resist layer; the pixel driving circuit layer comprises pixel driving circuits which correspond to the sub-pixel units one by one; the color resistance layer comprises color resistances corresponding to the sub-pixel units one by one. The pixel driving circuit is responsible for providing an electric field for the corresponding sub-pixel units, so that the electric field is used for driving the deflection of the liquid crystal molecules, and the switching from a bright state to a dark state is realized. And the color resistor arranged in the second substrate is used for filtering emergent light and emitting light with specified color, and full-color picture display can be realized through color matching of the adjacent red, green and blue three-color sub-pixel units.

With continuing reference to fig. 1 and 2, optionally, each of the first and second sub-pixel cell groups 211 and 212 includes a plurality of sub-pixel cell columns 210 extending along the first direction 100 or the second direction 200, and the sub-pixel cell columns 210 in the first and second sub-pixel cell groups 211 and 212 are alternately arranged in sequence along the second direction 200 or the first direction 100. And in order to guarantee the homogeneity of the picture that this dual display module assembly shows, the embodiment of the utility model provides a dual display module assembly is still provided, fig. 6 is the embodiment of the utility model provides a structural schematic diagram of another dual display module assembly. Referring to fig. 6, alternatively, the sub-pixel cells 21 in the first and second sub-pixel cell groups 211 and 212 are alternately arranged in sequence in both the first and second directions 100 and 200. At this time, the pictures displayed by the first and second subpixel unit groups 211 and 212, respectively, can be more uniform.

In a similar way, when the backlight module is arranged, in order to ensure the uniform distribution of the light rays in two polarization states in the backlight, the structure of the backlight module and the distribution of the backlight light source in the backlight module can be reasonably designed. As shown in fig. 1 and 3, the backlight module 10 may be a direct-type backlight module; each of the first backlight light source group 121 and the second backlight light source group 122 includes a plurality of backlight light source columns 120 extending along the first direction 100 or the second direction 200, and the backlight light source columns 120 in the first backlight light source group 121 and the second backlight light source group 122 are alternately arranged along the second direction 200 or the first direction 100. Fig. 7 is a schematic structural diagram of a backlight module of another dual display module according to an embodiment of the present invention, referring to fig. 7, or backlight sources 12 in a first backlight source group 121 and a second backlight source group 122 may also be disposed, and the backlight sources are sequentially and alternately arranged in a first direction 100 and a second direction 200.

Taking the dual display module shown in fig. 1 and 4 as an example, the display module is a direct type backlight module, and the plane of the backlight source in the backlight module is parallel to the plane of the liquid crystal panel. At this time, in order to ensure uniform emission of the backlight, a light guide plate 13 may be further disposed in the backlight module, the light guide plate 13 is located on the light emitting side of the backlight polarizer 11, and the vertical projection of the light guide plate 13 on the plane where the backlight light source 12 is located covers the area where the backlight light source 12 is located. At this time, the light guide plate 13 can homogenize the light emitted from the backlight source 12, so as to ensure that the backlight in two polarization states can be uniformly distributed on the light emitting plane of the whole backlight module, thereby ensuring that the uniformity of the image displayed by the liquid crystal panel is better, and ensuring that the two display images have better display effect during dual display.

Certainly, to the backlight unit of side incidence, the embodiment of the utility model provides a dual display module assembly is provided equally. Fig. 8 is a schematic structural view of another dual display module according to an embodiment of the present invention, referring to fig. 8, in the dual display module, the backlight module is a side-in type backlight module, the backlight module includes a light guide plate 13, and the light incident surface 131 and the light emitting surface 132 of the light guide plate 13 are adjacent to each other; the backlight source 12 and the backlight polarizer 11 are located on the light incident surface 131 side of the light guide plate 13, and the liquid crystal panel 20 is located on the light emitting surface 132 side of the light guide plate 13. Similarly, although the backlight source 12 and the backlight polarizer 11 are disposed at the side of the light guide plate 13, the backlight beam emitted through the light guide plate 13 can be uniformly emitted by the light guide plate 13, so that the uniformity of two frames displayed on the liquid crystal panel can be maintained. As will be understood by those skilled in the art, a reflective plate is generally disposed on a side of the light guide plate 13 away from the light exit surface 132, and light incident on the light guide plate from a side surface is reflected by the reflective plate to change a light path direction, so as to exit from the front surface of the light guide plate 13.

Referring to the dual display module shown in fig. 1 and 8, the size and dimension of the backlight source can be reasonably designed according to the size and dimension of the sub-pixel unit to ensure the brightness of the sub-pixel unit. The size and the arrangement density of the backlight light source are direct factors of the backlight brightness. Based on this, in the embodiment of the present invention, the backlight source can be selectively set to use light emitting diodes with different dimensions. Specifically, the backlight source may be a mini-LED, micro-LED or LED, which is not limited herein.

Fig. 9 is a schematic structural diagram of a dual display device provided in an embodiment of the present invention, referring to fig. 9, the dual display device includes an arbitrary dual display module 1 provided in an embodiment of the present invention. The dual display module 1 can be a mobile phone, a computer, a television, an advertisement screen, an intelligent wearable device and the like.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A dual display module comprises a backlight module and a liquid crystal panel, wherein the liquid crystal panel is arranged on the light emitting side of the backlight module, the dual display module is characterized in that the liquid crystal panel comprises a plurality of first sub-pixel unit groups and a plurality of second sub-pixel unit groups, the first sub-pixel unit groups and the second sub-pixel unit groups respectively comprise a plurality of sub-pixel units, and the sub-pixel units in the first sub-pixel unit groups and the second sub-pixel unit groups are uniformly distributed in a crossed manner;

the dual display module further comprises an upper polarizer and a lower polarizer, the upper polarizer is positioned on the light emergent side of the liquid crystal panel, and the lower polarizer is positioned between the backlight module and the liquid crystal panel;

the upper polaroid comprises a plurality of first upper polaroids and a plurality of second upper polaroids, and the lower polaroid comprises a plurality of first lower polaroids and a plurality of second lower polaroids; the vertical projections formed on the plane of the liquid crystal panel by the first upper polaroid and the first lower polaroid are at least partially overlapped with the sub-pixel units in the first sub-pixel unit group; the vertical projections formed on the plane of the liquid crystal panel by the second upper polarizer and the second lower polarizer are at least partially overlapped with the sub-pixel units in the second sub-pixel unit group;

the transmission axes of the first upper polarizer and the second lower polarizer extend along a first direction, the transmission axes of the second upper polarizer and the first lower polarizer extend along a second direction, and the first direction is perpendicular to the second direction.

2. The dual display module of claim 1, wherein the backlight module comprises a backlight polarizer and a plurality of backlight sources, the backlight polarizer is located at the light emitting side of the plurality of backlight sources; the plurality of backlight light sources comprise a first backlight light source group and a second backlight light source group;

the backlight polaroids comprise a plurality of first backlight polaroids and a plurality of second backlight polaroids, and the vertical projection of the first backlight polaroids on the plane where the backlight light sources are located is at least partially overlapped with the backlight light sources in the first backlight light source group; the vertical projection of the second backlight polaroid on the plane where the backlight light sources are located is at least partially overlapped with the backlight light sources in the second backlight light source group;

the transmission axis of the first backlight polaroid extends along the first direction, and the transmission axis of the second backlight polaroid extends along the second direction.

3. The dual display module of claim 1, wherein the liquid crystal panel comprises a first substrate, a liquid crystal layer and a second substrate in sequence along a light emitting direction, the liquid crystal layer comprising liquid crystal molecules; a first alignment layer is arranged on the surface of one side, facing the liquid crystal layer, of the first substrate; a second alignment layer is arranged on the surface of one side, facing the liquid crystal layer, of the second substrate;

an alignment direction of the first alignment layer in the sub-pixel cells of the first sub-pixel cell group is perpendicular to an alignment direction of the first alignment layer in the sub-pixel cells of the second sub-pixel cell group; an alignment direction of the second alignment layer in the sub-pixel unit of the first sub-pixel unit group is perpendicular to an alignment direction of the second alignment layer in the sub-pixel unit of the second sub-pixel unit group.

4. The dual display module of claim 1, wherein the sub-pixel units in the first sub-pixel unit group and the second sub-pixel unit group are alternately arranged in sequence in the first direction and the second direction;

or, each of the first and second sub-pixel unit groups includes a plurality of sub-pixel unit columns extending along the first direction or the second direction, and the sub-pixel unit columns in the first and second sub-pixel unit groups are alternately arranged in sequence along the second direction or the first direction.

5. The dual display module of claim 2, wherein the backlight module is a direct-type backlight module;

the backlight light sources in the first backlight light source group and the second backlight light source group are sequentially and alternately arranged in the first direction and the second direction; or, each of the first backlight light source group and the second backlight light source group includes a plurality of backlight light source columns extending along the first direction or the second direction, and the backlight light source columns in the first backlight light source group and the second backlight light source group are alternately arranged along the second direction or the first direction in sequence.

6. The dual display module of claim 5, wherein the backlight module further comprises a light guide plate, the light guide plate is located at a light exit side of the backlight polarizer, and a vertical projection of the light guide plate on a plane where the backlight light source is located covers an area where the backlight light source is located.

7. The dual display module of claim 2, wherein the backlight module is a side-in type backlight module, the backlight module comprises a light guide plate, and the light incident surface and the light emitting surface of the light guide plate are adjacent;

the backlight source and the backlight polaroid are positioned on one side of the light incident surface of the light guide plate, and the liquid crystal panel is positioned on one side of the light emergent surface of the light guide plate.

8. The dual display module of claim 2, wherein the backlight source comprises a mini-LED, micro-LED or LED.

9. The dual display module of claim 3, wherein a pixel driving circuit layer is disposed on a side of the first substrate facing the liquid crystal layer, and a color resist layer is disposed on the second substrate;

the pixel driving circuit layer comprises pixel driving circuits which correspond to the sub-pixel units one by one; the color resistance layer comprises color resistances corresponding to the sub-pixel units one to one.

10. A dual display device comprising the dual display module according to any one of claims 1 to 9.

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