CN106647069B - Double-sided display device - Google Patents
Double-sided display device Download PDFInfo
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- CN106647069B CN106647069B CN201611207341.1A CN201611207341A CN106647069B CN 106647069 B CN106647069 B CN 106647069B CN 201611207341 A CN201611207341 A CN 201611207341A CN 106647069 B CN106647069 B CN 106647069B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1345—Conductors connecting electrodes to cell terminals
- G02F1/13458—Terminal pads
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133342—Constructional arrangements; Manufacturing methods for double-sided displays
Abstract
The invention discloses a double-sided display device, which comprises a first display panel and a second display panel, wherein the first display panel and the second display panel are mutually attached, the first display panel comprises a flexible array substrate, the flexible array substrate is provided with a flexible extending part, the second display panel comprises a rigid array substrate, the tail end of the flexible extending part is connected to the rigid array substrate, the first display panel and the second display panel can be electrically associated, and a bonding pad is further arranged on a circuit formed by mutually connecting the rigid array substrate and the flexible extending part; the double-sided display device further comprises a driving module, wherein the driving module is connected to the bonding pad through a flexible printed circuit board, and driving signals are respectively provided for the first display panel and the second display panel through connection of the bonding pad. Therefore, two display panels in the double-sided display device share one group of printed circuit board and driving module, which is beneficial to the simplification of a driving system and the reduction of cost.
Description
Technical Field
The invention relates to the technical field of panel display, in particular to a double-sided display device.
Background
At present, the forms of electronic products tend to be diversified, and the double-sided display function becomes an important feature of new generation electronic products. For example, a double-sided display device inside a mobile phone can display a main function window of the mobile phone on one side and display time on the other side; for example, the use of a dual-sided display in public places allows the various contents of the display to be viewed by persons on either side of the display. The double-sided display device produced in the industry at present is usually formed by attaching two single-sided display panels, and may be a liquid crystal display panel and an organic electroluminescent panel arranged back to back, or two liquid crystal display panels arranged back to back. Fig. 1 is a schematic structural diagram of a conventional dual-sided display device, which includes a first display panel 1a and a second display panel 1b that are disposed back to back and are attached to each other, where the first display panel 1a is connected to a driving module 3a through a flexible printed circuit board 2a, and the second display panel 1b is connected to another driving module 3b through another flexible printed circuit board 2b, that is, two display panels disposed back to back are respectively provided with a corresponding printed circuit board and a corresponding driving module, and two signal input terminals are required for performing dual-sided display. This is disadvantageous in terms of simplification of the drive system, reduction in cost, and development of light weight and thin electronic products.
Disclosure of Invention
In view of the shortcomings of the prior art, the present invention provides a dual-sided display device, in which two display panels share one set of printed circuit board and driving module, which is beneficial to the simplification of the driving system and the reduction of the cost, and can make the electronic product including the dual-sided display device thinner and lighter.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-sided display device comprises a first display panel and a second display panel which are attached to each other, wherein the display surfaces of the first display panel and the second display panel are arranged oppositely, the first display panel comprises a flexible array substrate, the flexible array substrate is provided with a flexible extending part extending out from the side surface of the first display panel, and a plurality of first signal lines are arranged in the flexible extending part; the second display panel comprises a rigid array substrate, a plurality of second signal lines and a binding region are arranged in the rigid array substrate, the binding region is provided with a connecting end, and the connecting end comprises a plurality of connecting wires; the tail end of the flexible extension part is connected to the binding area, the first signal wires are connected to the connecting wires in a one-to-one correspondence mode, and a bonding pad is further arranged on a circuit formed by the binding area and the flexible extension part in an interconnection mode; the double-sided display device further comprises a driving module, wherein the driving module is connected to the bonding pad through a flexible printed circuit board, and driving signals are respectively provided for the first display panel and the second display panel through connection of the bonding pad.
Preferably, the pad is disposed in the bonding region, and the plurality of second signal lines are connected to the pad; the first signal lines are connected to one ends of the connection traces in a one-to-one correspondence, and the other ends of the connection traces are connected to the pads.
Preferably, the first display panel and the second display panel have the same resolution or pixel size, and the plurality of second signal lines and the plurality of connecting traces are connected to each other on the pad in a one-to-one correspondence manner, so that the first display panel and the second display panel receive the same set of driving signals.
Preferably, the first display panel and the second display panel have the same or different resolutions or pixel sizes, and the plurality of second signal lines and the plurality of connecting traces are staggered on the pad one by one, so that the first display panel receives a first group of driving signals and the second display panel receives a second group of driving signals.
Preferably, the plurality of first signal lines are connected to one ends of the plurality of connection traces in a one-to-one correspondence, and the other ends of the plurality of connection traces are connected to the plurality of second signal lines in a one-to-one correspondence; the bonding pad is connected on the flexible extension part, the position of the bonding pad is taken as a dividing point, the plurality of first signal lines are divided into a first part and a second part which are respectively connected to the bonding pad, the first part of the plurality of first signal lines are electrically connected to the first display panel, and the second part of the plurality of first signal lines are electrically connected to the second display panel through the plurality of connecting wiring lines; wherein the pad is disposed on an upper surface of the flexible extension; or, the pad is arranged on the lower surface of the flexible extension part, a first via hole is arranged on the flexible extension part, a conductive material is deposited in the first via hole, and the pad is electrically connected with the plurality of first signal lines through the first via hole; wherein the upper surface of the flexible extension portion is a surface on which the plurality of first signal lines are disposed.
Preferably, the first display panel and the second display panel have the same resolution or pixel size, and a first portion of the plurality of first signal lines and a second portion of the plurality of first signal lines are connected to each other on the pad in a one-to-one correspondence, so that the first display panel and the second display panel receive the same set of driving signals.
Preferably, the first display panel and the second display panel have the same or different resolutions or pixel sizes, and a first portion of the plurality of first signal lines and a second portion of the plurality of first signal lines are arranged on the pad in a staggered manner one by one, so that the first display panel receives a first set of driving signals and the second display panel receives a second set of driving signals.
Preferably, the end of the flexible extension portion is folded back to face the upper surface to the bonding region, and the upper surface is connected to the bonding region through an anisotropic conductive adhesive, so that the first signal line on the upper surface and the connection trace on the bonding region are electrically connected to each other; or the lower surface of the flexible extension part is connected to the binding region through anisotropic conductive adhesive, a second via hole is formed in the tail end of the flexible extension part, conductive material is deposited in the second via hole, and the first signal line on the upper surface and the connection wiring on the binding region are electrically connected with each other through a conductive channel formed by the anisotropic conductive adhesive and the second via hole.
Preferably, the first display panel is a transmissive liquid crystal display panel or a reflective liquid crystal display panel, and the second display panel is a transmissive liquid crystal display panel or a reflective liquid crystal display panel.
Preferably, the first display panel and the second display panel are both transmissive liquid crystal display panels; the first display panel comprises a first backlight module, a first substrate, a flexible array substrate and a first color film substrate which are sequentially arranged in a laminated manner, and the second display panel comprises a second backlight module, a rigid array substrate and a second color film substrate which are sequentially arranged in a laminated manner; the second backlight module is attached to the first backlight module towards the first backlight module; or the first display panel and the second display panel have a common backlight module, the first display panel comprises a first substrate, a flexible array substrate and a first color film substrate which are sequentially arranged on the common backlight module in a laminated manner, and the second display panel comprises a rigid array substrate and a second color film substrate which are sequentially arranged on the common backlight module in a laminated manner; the common backlight module is a backlight module with double-sided light emission.
Has the advantages that:
in the double-sided display device provided by the embodiment of the invention, one display panel comprises a flexible array substrate, the flexible array substrate is connected to a rigid array substrate of the other display panel in an extending manner, a bonding pad is further arranged on a circuit for connecting the flexible array substrate and the rigid array substrate, and a driving module of the double-sided display device is connected to the bonding pad through a flexible printed circuit board. Therefore, the two display panels share one group of printed circuit board and one driving module, which is beneficial to the simplification of a driving system and the reduction of cost, and can lead the electronic product comprising the double-sided display device to be thinner and lighter.
Drawings
Fig. 1 is a schematic structural diagram of a conventional double-sided display device;
fig. 2 is a schematic structural diagram of a dual-sided display device provided in embodiment 1 of the present invention;
fig. 3 is an exemplary illustration of interconnection of a pad and a signal line in embodiment 1 of the present invention;
fig. 4 is an exemplary illustration of interconnection of a pad and a signal line in embodiment 2 of the present invention;
FIGS. 5a and 5b are illustrations of the interconnection of the flexible extension and the binding in example 3 of the present invention;
fig. 6 is a schematic structural diagram of a dual-sided display device provided in embodiment 4 of the present invention;
fig. 7 is a schematic structural diagram of a dual-sided display device provided in embodiment 5 of the present invention;
fig. 8 is an exemplary illustration of interconnection of a pad and a signal line in embodiment 5 of the present invention;
fig. 9 is an exemplary illustration of interconnection of a pad and a signal line in embodiment 6 of the present invention;
fig. 10 is a schematic structural view of a double-sided display device provided in embodiment 7 of the present invention;
fig. 11 is a diagram showing interconnection of the pad and the flexible extension in embodiment 7 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described in accordance with the drawings are exemplary only, and the invention is not limited to these embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.
Example 1
The embodiment provides a double-sided display device, as shown in fig. 2, the double-sided display device includes a first display panel 10 and a second display panel 20 attached to each other, and display surfaces of the first display panel 10 and the second display panel 20 are arranged opposite to each other.
The array substrate of the first display panel 10 is a flexible array substrate, and the array substrate of the second display panel 20 is a rigid array substrate. The first display panel 10 may be a transmissive liquid crystal display panel or a reflective liquid crystal display panel, and the second display panel 20 may be a transmissive liquid crystal display panel or a reflective liquid crystal display panel. In some other embodiments, the first display panel 10 and the first display panel 20 may be selected to be OLED display panels.
In the present embodiment, the first display panel 10 and the second display panel 20 are both selected as transmissive liquid crystal display panels. Specifically, as shown in fig. 2, the first display panel 10 includes a first backlight module 11, a first substrate 12, a flexible array substrate 13, and a first color film substrate 14, which are sequentially stacked, the second display panel 20 includes a second backlight module 21, a rigid array substrate 22, and a second color film substrate 23, which are sequentially stacked, and the second backlight module 21 is attached to the first backlight module 11.
In the first display panel 10, an array structure (e.g., thin film transistors, scan lines, data lines, pixel electrodes, common electrodes, etc.) is disposed on the flexible array substrate 13, and the first substrate 12 is a rigid substrate, such as a glass substrate, which is mainly used to support the flexible array substrate 13 and maintain a uniform cell thickness of the first display panel 10. The material of the flexible array substrate 13 may be any suitable flexible material, and may be formed by a polymer material such as Polyimide (PI), Polycarbonate (PC), Polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyarylate (PAR), or glass Fiber Reinforced Plastic (FRP), and the thickness of the flexible array substrate 13 may be selected to be 5 to 500 micrometers. Further, as shown in fig. 2, the flexible array substrate 13 has a flexible extension portion 15 extending from a side surface of the first display panel 10, and a plurality of first signal lines (not shown in fig. 2) are disposed in the flexible extension portion 15, and the plurality of first signal lines include traces connected to signal line inputs such as scan lines, data lines, and common electrodes in the first display panel 10. The flexible extension portion 15 may have a smaller thickness than the flexible array substrate 13 through a thinning process, so as to increase the bending performance of the flexible extension portion 15. It should be noted that the thinning of the flexible extension 15 is an alternative preferred solution and is not essential.
In the second display panel 20, an array structure (e.g., thin film transistors, scan lines, data lines, pixel electrodes, common electrodes, etc.) is disposed on the rigid array substrate 22, and the rigid array substrate 22 may be a commonly used glass substrate. The rigid array substrate 22 is provided therein with a plurality of second signal lines (not shown in fig. 2) including traces connected to signal line inputs such as scan lines, data lines, and common electrodes in the second display panel 20, and a bonding area 24, where the bonding area 24 is provided with a connection terminal 24a, and the connection terminal 24a includes a plurality of connection traces (not shown in fig. 2).
The end 15a of the flexible extension 15 is connected to the bonding region 24, and the first signal lines are connected to the connection traces in a one-to-one correspondence manner, so that the first display panel 10 and the second display panel 20 can be electrically associated with each other. Further, a bonding pad 40 is further disposed on a line connecting the bonding region 24 and the flexible extension portion 15, and the dual-sided display device further includes a driving module 50, wherein the driving module 50 is connected to the bonding pad 40 through a flexible printed circuit board 60, and driving signals are respectively provided to the first display panel 10 and the second display panel 20 through the connection of the bonding pad 40.
Based on the above structure, the two display panels 10 and 20 in the dual-sided display device share one set of the printed circuit board 60 and one driving module 50, which is beneficial to the simplification of the driving system and the reduction of the cost, and can make the electronic product including the dual-sided display device thinner and lighter.
Further, in this embodiment, as shown in fig. 2 and fig. 3, the bonding pad 40 is disposed in the bonding region 24, the plurality of second signal lines 25 in the rigid array substrate 22 are connected to the bonding pad 40, the plurality of first signal lines 16 of the flexible extension portion 15 are connected to one ends of the plurality of connection traces 241 in the connection end 24a in a one-to-one correspondence manner, and the other ends of the plurality of connection traces 241 are connected to the bonding pad 40.
More specifically, in the present embodiment, the first display panel 10 and the second display panel 20 have the same resolution or pixel size, and the areas of the first display panel 10 and the second display panel 20 may be set to be equal or unequal. At this time, as shown in fig. 3, the plurality of second signal lines 25 and the plurality of connecting traces 241 are connected to each other on the pad 40 in a one-to-one correspondence manner, that is, the plurality of second signal lines 25 are also connected to the plurality of first signal lines 16 in a one-to-one correspondence manner, so that the first display panel 10 and the second display panel 20 receive the same set of driving signals, and the driving module 50 can drive the first display panel 10 and the second display panel 20 to display the same image by only providing one set of driving signals.
Further, in this embodiment, as shown in fig. 2, since the display surfaces of the first display panel 10 and the second display panel 20 are disposed opposite to each other, and the upper surface (the surface on which the plurality of first signal lines are disposed) of the flexible extension portion 15 is opposite to the upper surface (the surface on which the plurality of connection traces 2 are disposed) of the rigid array substrate 22, when the end 15a of the flexible extension portion 15 is connected to the bonding region 24, the end 15a of the flexible extension portion 15 is folded back to face the upper surface of the bonding region 24, and the upper surface of the flexible extension portion 15 is connected to the bonding region 24 through an anisotropic conductive adhesive (not shown), so that the first signal lines and the connection traces are electrically connected to each other. The anisotropic conductive adhesive is adopted for interconnection, so that the stability of electric connection can be kept, the different signal wires can be insulated from each other, and short circuit is avoided.
It should be noted that, the first display panel 10 and the second display panel 20 only respectively show the backlight module, the array substrate and the color film substrate, and these structural layers only briefly describe some structures and components of the display panel, but are not limited to these: for example, the color filter substrate includes a Black Matrix (BM), an RGB color resist layer, and the array substrate includes a TFT switch, a scan line, a data line, a pixel electrode, a common electrode, and the like. The liquid crystal display panel further includes other display components, such as an alignment film, a liquid crystal layer, and sealant between the array substrate and the color film substrate, which can be implemented with reference to the prior art and are not described herein again.
Example 2
The present embodiment is different from embodiment 1 in that the connection structure of the pad and the signal line in the present embodiment is different from that in embodiment 1. Specifically, as shown in fig. 4, the plurality of second signal lines 25 and the plurality of connecting traces 241 are arranged on the pads 40 in a staggered manner, that is, the plurality of second signal lines 25 and the plurality of first signal lines 16 are also arranged in a staggered manner, so that the driving module needs to provide two sets of driving signals, the first display panel 10 receives a first set of driving signals, and the second display panel 20 receives a second set of driving signals.
In this embodiment, the first display panel 10 and the second display panel 20 may have the same resolution or pixel size, and when the first display panel 10 and the second display panel 20 are required to display the same image, the first group of driving signals and the second group of driving signals may be set as the same driving signals; if the first display panel 10 and the second display panel 20 are required to display different pictures, the first group of driving signals and the second group of driving signals are required to be set as different driving signals. Of course, the first display panel 10 and the second display panel 20 may also have different resolutions and pixel sizes, and the driving module needs to provide two sets of driving signals to respectively drive the first display panel 10 and the second display panel 20 for displaying.
Example 3
Different from the above embodiments, the connection structure of the flexible extension portion of the first display panel and the binding region of the second display panel in this embodiment is different. Specifically, as shown in fig. 5a and 5b, in this embodiment, the lower surface of the flexible extension portion 15 is connected to the bonding region 24 through an anisotropic conductive adhesive 70, a second via hole 152 is disposed at the end 15a of the flexible extension portion 15, a conductive material is deposited in the second via hole 152, the conductive material may be, for example, Ag paste or solder, and a conductive channel formed by the anisotropic conductive adhesive 70 and the second via hole 152 electrically connects the first signal line 16 on the upper surface of the flexible extension portion 15 and the connection trace 241 on the bonding region 24.
Example 4
Different from the above embodiments, in the present embodiment, the first display panel and the second display panel have a common backlight module. Specifically, as shown in fig. 6, the first display panel 10 includes a first substrate 12, a flexible array substrate 13 and a first color film substrate 14 sequentially stacked on the common backlight module 00, and the second display panel 20 includes a rigid array substrate 22 and a second color film substrate 23 sequentially stacked on the common backlight module 00. The common backlight module 00 is a backlight module capable of emitting light from both sides.
Example 5
The present embodiment is different from embodiment 1 in that the pad connection position in the present embodiment is different from that in embodiment 1. Specifically, in this embodiment, the plurality of first signal lines 16 in the flexible extension portion 15 are connected to one ends of the plurality of connection traces 241 in the connection end 24a in a one-to-one correspondence manner, and the other ends of the plurality of connection traces 241 are connected to the plurality of second signal lines 25 in the rigid array substrate 22 in a one-to-one correspondence manner. As shown in fig. 7 and 8, the bonding pad 40 is connected to the upper surface (surface provided with a plurality of first signal lines) of the flexible extension portion 15, the position of the bonding pad 40 is taken as a dividing point, the plurality of first signal lines 16 are divided into a first part and a second part which are respectively connected to the bonding pad 40, the first part of the plurality of first signal lines 16a is electrically connected to the first display panel 10, and the second part of the plurality of first signal lines 16b is electrically connected to the second display panel 20 through the plurality of connection traces 241.
More specifically, in the present embodiment, the first display panel 10 and the second display panel 20 have the same resolution or pixel size, and the areas of the first display panel 10 and the second display panel 20 may be set to be equal or unequal. At this time, as shown in fig. 8, a first portion of the plurality of first signal lines 16a and a second portion of the plurality of first signal lines 16b are connected to the pad 40 in a one-to-one correspondence manner, the driving signal accessed from the pad 40 is input to the first display panel 10 through the first portion of the plurality of first signal lines 16a, and is input to the second display panel 20 through the second portion of the plurality of first signal lines 16b sequentially connected to the connection trace 241 and the second signal line 25, so that the first display panel 10 and the second display panel 20 receive the same set of driving signals, and the driving module 50 can drive the first display panel 10 and the second display panel 20 to display the same picture by only providing one set of driving signals.
It should be noted that, in this embodiment, the connection structure of the flexible extension portion of the first display panel and the binding region of the second display panel may also be implemented by referring to the manner of embodiment 3; the backlight module of the first display panel and the second display panel can also be implemented in the manner described in embodiment 4.
Example 6
The present embodiment is different from embodiment 5 in that the connection structure of the pad and the signal line in the present embodiment is different from that in embodiment 5. Specifically, as shown in fig. 9, a first portion of the plurality of first signal lines 16a and a second portion of the plurality of first signal lines 16b are arranged on the pads 40 in a staggered manner, so that the driving module needs to provide two sets of driving signals, the first display panel 10 receives the first set of driving signals, and the second display panel 20 receives the second set of driving signals.
In this embodiment, the first display panel 10 and the second display panel 20 may have the same resolution or pixel size, and when the first display panel 10 and the second display panel 20 are required to display the same image, the first group of driving signals and the second group of driving signals may be set as the same driving signals; if the first display panel 10 and the second display panel 20 are required to display different pictures, the first group of driving signals and the second group of driving signals are required to be set as different driving signals. Of course, the first display panel 10 and the second display panel 20 may also have different resolutions and pixel sizes, and the driving module needs to provide two sets of driving signals to respectively drive the first display panel 10 and the second display panel 20 for displaying.
Example 7
The difference between this embodiment and embodiment 5 or embodiment 6 is that the connection manner of the pad and the flexible extension portion in this embodiment is different from that in embodiment 5 or embodiment 6. Specifically, referring to fig. 10 and 11, in this embodiment, the pad 40 is connected to the lower surface of the flexible extension portion 15, a first via 151 is disposed on the flexible extension portion 15, a conductive material is deposited in the first via 151, the conductive material may be Ag paste or solder, for example, and the pad 40 is electrically connected to the plurality of first signal lines 16 through the first via 151; the lower surface of the flexible extension portion 15 is the other surface opposite to the upper surface thereof, and the upper surface of the flexible extension portion 15 is the surface on which the plurality of first signal lines 16 are provided.
In summary, in the dual-sided display device provided in the embodiments of the present invention, one of the display panels includes a flexible array substrate, the flexible array substrate is connected to a rigid array substrate of the other display panel in an extending manner, a pad is further disposed on a circuit connecting the flexible array substrate and the rigid array substrate, and a driving module of the dual-sided display device is connected to the pad through a flexible printed circuit board. Therefore, the two display panels share one group of printed circuit board and one driving module, which is beneficial to the simplification of a driving system and the reduction of cost, and can lead the electronic product comprising the double-sided display device to be thinner and lighter.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (6)
1. A double-sided display device comprises a first display panel and a second display panel which are mutually attached, wherein the display surfaces of the first display panel and the second display panel are arranged oppositely,
the first display panel comprises a flexible array substrate, the flexible array substrate is provided with a flexible extension part extending out from the side surface of the first display panel, and a plurality of first signal lines are arranged in the flexible extension part;
the second display panel comprises a rigid array substrate, a plurality of second signal lines and a binding region are arranged in the rigid array substrate, the binding region is provided with a connecting end, and the connecting end comprises a plurality of connecting wires;
the tail end of the flexible extension part is connected to the binding area, the first signal wires are connected to the connecting wires in a one-to-one correspondence mode, and a bonding pad is further arranged on a circuit formed by the binding area and the flexible extension part in an interconnection mode;
the double-sided display device further comprises a driving module, the driving module is connected to the bonding pad through a flexible printed circuit board, driving signals are respectively provided for the first display panel and the second display panel through connection of the bonding pad, the plurality of first signal lines are connected to one ends of the plurality of connecting wires in a one-to-one correspondence manner, and the other ends of the plurality of connecting wires are connected to the plurality of second signal lines in a one-to-one correspondence manner;
the bonding pad is connected on the flexible extension part, the position of the bonding pad is taken as a dividing point, the plurality of first signal lines are divided into a first part and a second part which are respectively connected to the bonding pad, the first part of the plurality of first signal lines are electrically connected to the first display panel, and the second part of the plurality of first signal lines are electrically connected to the second display panel through the plurality of connecting wiring lines;
wherein the pad is disposed on an upper surface of the flexible extension; or, the pad is arranged on the lower surface of the flexible extension part, a first via hole is arranged on the flexible extension part, a conductive material is deposited in the first via hole, and the pad is electrically connected with the plurality of first signal lines through the first via hole; wherein the upper surface of the flexible extension portion is a surface on which the plurality of first signal lines are disposed.
2. The dual-sided display device of claim 1, wherein the first and second display panels have the same resolution or pixel size, and a first portion of the plurality of first signal lines and a second portion of the plurality of first signal lines are connected to each other in a one-to-one correspondence on the pads such that the first and second display panels receive the same set of driving signals.
3. The dual-sided display device of claim 2, wherein the first and second display panels have the same or different resolutions or pixel sizes, and a first portion of the plurality of first signal lines and a second portion of the plurality of first signal lines are arranged on the pads in a staggered manner one by one so that the first display panel receives a first set of driving signals and the second display panel receives a second set of driving signals.
4. The dual-sided display device of any one of claims 1 to 3, wherein the end of the flexible extension portion is folded back to face the upper surface toward the bonding region, and the upper surface is connected to the bonding region through an anisotropic conductive adhesive, so that the first signal line on the upper surface and the connection trace on the bonding region are electrically connected to each other; or the lower surface of the flexible extension part is connected to the binding region through anisotropic conductive adhesive, a second via hole is formed in the tail end of the flexible extension part, conductive material is deposited in the second via hole, and the first signal line on the upper surface and the connection wiring on the binding region are electrically connected with each other through a conductive channel formed by the anisotropic conductive adhesive and the second via hole.
5. The dual-sided display device of claim 4, wherein the first display panel is a transmissive liquid crystal display panel or a reflective liquid crystal display panel, and the second display panel is a transmissive liquid crystal display panel or a reflective liquid crystal display panel.
6. The dual-sided display device of claim 5, wherein the first display panel and the second display panel are both transmissive liquid crystal display panels; wherein the content of the first and second substances,
the first display panel comprises a first backlight module, a first substrate, a flexible array substrate and a first color film substrate which are sequentially arranged in a laminated manner, and the second display panel comprises a second backlight module, a rigid array substrate and a second color film substrate which are sequentially arranged in a laminated manner; the second backlight module is attached to the first backlight module towards the first backlight module;
or the first display panel and the second display panel have a common backlight module, the first display panel comprises a first substrate, a flexible array substrate and a first color film substrate which are sequentially arranged on the common backlight module in a laminated manner, and the second display panel comprises a rigid array substrate and a second color film substrate which are sequentially arranged on the common backlight module in a laminated manner; the common backlight module is a backlight module with double-sided light emission.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107632475B (en) * | 2017-10-31 | 2020-11-03 | 武汉天马微电子有限公司 | Display panel and display device |
| CN108777114B (en) * | 2018-06-26 | 2021-05-14 | 上海中航光电子有限公司 | Display panel, manufacturing method thereof, display device and spliced screen |
| CN110320690B (en) * | 2019-08-09 | 2022-09-02 | 京东方科技集团股份有限公司 | Display device |
| CN110827696A (en) | 2019-10-28 | 2020-02-21 | 惠州市华星光电技术有限公司 | Double-sided display screen and display device |
| CN111179755A (en) | 2020-01-03 | 2020-05-19 | 京东方科技集团股份有限公司 | Chip packaging structure and display device |
| KR20220017043A (en) * | 2020-08-03 | 2022-02-11 | 삼성디스플레이 주식회사 | Display device |
| CN114170917B (en) * | 2022-01-12 | 2023-11-03 | 昆山国显光电有限公司 | Display module and display device |
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