Dual-sided display device

Abstract

The application relates to a double-sided display device, which comprises a main part and a display part connected by a hinge, the display part comprises a back plate and a first display module and a second display module located on the opposite sides of the back plate; the first display module comprises a first backlight module and a first display panel, the first display panel comprises a first display area and a first binding area, the first binding area is located on the side of the first display area close to the main part, and the first binding area is provided with a first source electrode driving chip; the second display module comprises a second backlight module and a second display panel, the second display panel comprises a second display area and a second binding area, the second binding area is located on the side of the second display area away from the main part, and the second binding area is provided with a second source electrode driving chip; in a first direction, the side of the back plate close to the main part is provided with a PCB plate, a first flexible circuit board is arranged between the PCB plate and the first binding area, and a second flexible circuit board is arranged between the PCB plate and the second binding area.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display product manufacturing, and in particular to a double-sided display device. BACKGROUND

[0002] With the progress of semiconductor technology, portable electronic devices such as mobile phones or notebook computers have become thinner, lighter and more powerful.

[0003] Ultra-thin and ultra-light are the main development direction of current notebook computers, but this does not affect the improvement of performance and the richness of functions. At the same time, its portability and backup power make mobile office possible. The display screen is one of the key hardware of the notebook, but the current display screen is single-sided display, and the display surface is located on the side close to the host, that is, only in the open state, it can be used, and the display function is single. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a double-sided display device to solve the problem of single-sided display and single function of electronic devices.

[0005] In order to achieve the above purpose, the technical scheme adopted by the embodiments of the present application is: a double-sided display device, comprising a host part and a display part connected with the host part, the display part comprising a back plate and a first display module and a second display module located on the opposite sides of the back plate;

[0006] Along the direction away from the back plate, the first display module comprises a first backlight module and a first display panel, the light emitting surface of the first display panel is arranged towards the host part, along the first direction, the first display panel comprises a first display area and a first binding area located on one side of the first display area, the first binding area is located on the side of the first display area close to the host part, and the first binding area is provided with a first source electrode driving chip;

[0007] Along the direction away from the back plate, the second display module comprises a second backlight module and a second display panel, the light emitting surface of the second display panel is arranged away from the host part, along the first direction, the second display panel comprises a second display area and a second binding area located on one side of the second display area, the second binding area is located on the side of the second display area away from the host part, and the second binding area is provided with a second source electrode driving chip;

[0008] In the first direction, the side of the back plate close to the host part is provided with a PCB board, a first flexible circuit board is arranged between the PCB board and the first binding area, and a second flexible circuit board is arranged between the PCB board and the second binding area.

[0009] Optionally, the second flexible circuit board comprises, in sequence in a direction away from the PCB, a first portion, a second portion, a third portion, and a fourth portion.

[0010] The first portion is connected to the PCB at an end away from the second portion, the second portion is located between the back plate and the second backlight film group, the third portion is located on a side of the second display module away from the PCB, and the fourth portion covers a light-out surface of the second display panel to be bound and connected with the second binding area.

[0011] Optionally, in a light-out direction of the first display module, the PCB has opposite first and second sides, the first side is provided with a third binding area bound and connected with the first binding area, and the second side is provided with a fourth binding area bound and connected with the second binding area.

[0012] Optionally, the first side of the PCB is provided with a first backlight connector, and the first backlight connector is connected with a light bar in the first backlight module through a flexible flat cable; the second side of the PCB is provided with a second backlight connector, and the second backlight connector is connected with a light bar in the second backlight module through a flexible flat cable.

[0013] Optionally, the PCB is provided with a timing control circuit and a backlight control circuit.

[0014] The timing control circuit is configured to output the backlight signal according to a preset rule.

[0015] The backlight control circuit is configured to control the first backlight module and the second backlight module to be lit in time according to the backlight signal.

[0016] Optionally, the side of the back plate close to the PCB is provided with a locking lug, the locking lug is provided with a first threaded hole, and the PCB is provided with a second threaded hole matched with the first threaded hole.

[0017] Optionally, the back plate comprises a bottom plate, the periphery of the bottom plate is provided with a first side plate extending towards the first display module, and the bottom plate and the first side plate enclose a containing cavity for containing the first display module; the periphery of the bottom plate is provided with a second side plate extending towards the second display module, and the bottom plate and the second side plate enclose a containing cavity for containing the second display module.

[0018] Optionally, the back plate further comprises a first lug extending inwardly from part of the first side plate, the first lug is parallel to the bottom plate, and a second lug extending inwardly from part of the second side plate, the second lug is parallel to the bottom plate.

[0019] Optionally, the backboard further comprises a first connecting plate extending outwardly from the first side plate, and a second connecting plate extending outwardly from the second side plate, the first side plate, the second side plate, the first connecting plate and the second connecting plate jointly enclose a receiving cavity for receiving the PCB.

[0020] Optionally, the first backlight module comprises a first light guide plate and a multilayer first optical film layer arranged on a light exit surface of the first light guide plate, and the second backlight module comprises a second light guide plate and a multilayer second optical film layer arranged on a light exit surface of the second light guide plate, the multilayer first optical film layer and the multilayer second optical film layer are symmetrically arranged relative to the backboard.

[0021] The beneficial effects of the present application are: the double-sided display device provided in the present application comprises a host part and a display part pivotally connected, the display part comprises a backboard and first and second display modules located on opposite sides of the backboard, realizing double-sided display of portable electronic devices such as notebook computers, i.e. display through the first display module in the open state and display through the second display module in the closed state, suitable for various use scenarios, and greatly improving product performance.

[0022] And along the first direction, the side of the backboard close to the host part is provided with a PCB, the display panel in the first display module comprises a first display area and a first binding area located on the side of the first display area close to the PCB, the first binding area is provided with a first source driving chip for transmitting signals to the first display area, so that when the host part and the display part are in the open state, the picture displayed by the first display area is forward, facilitating the user to watch. The display panel in the second display module comprises a second display area and a second binding area located on the side of the second display area away from the PCB, the second binding area is provided with a second source driving chip for transmitting signals to the second display area, so that when the host part and the display part are in the closed state, the picture displayed by the second display area is also forward, facilitating the user to watch. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A structural schematic diagram of a display module in the prior art is shown;

[0024] Figure 2 A structural schematic diagram of a display part in an embodiment of the present application is shown;

[0025] Figure 3 A display principle block diagram of the display part in an embodiment of the present application is shown;

[0026] Figure 4 This diagram illustrates the connection between the PCB board and the first and second display panels in an embodiment of the present invention. Figure 1 ;

[0027] Figure 5 This diagram illustrates the connection between the PCB board and the first and second display panels in an embodiment of the present invention. Figure 2 . Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0029] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0030] Current laptops consist of a main unit and a display unit. The display unit can be flipped open relative to the main unit, with the display side facing the main unit. The image displayed on the display unit can only be seen when it is open. When the display unit is closed on the main unit, the exposed shell part of the display unit cannot display anything. In other words, current laptops can only display from one side, resulting in limited functionality.

[0031] refer to Figures 2-5In view of the above problems, the embodiment provides a double-sided display device, which comprises a host part and a display part connected with the host part, the display part and the host part are pivotally connected, so that the display part can be opened and closed relative to the host part, the display part comprises a back plate 1 and first and second display modules located on opposite sides of the back plate 1.

[0032] In a direction away from the back plate 1, the first display module comprises a first backlight module 11 and a first display panel 12, the light exit surface of the first display panel 12 is arranged towards the host part, in a first direction (X direction, for reference Figure 2 The first display panel 12 comprises a first display area and a first binding area 18 located on one side of the first display area, the first binding area 18 is located on the side of the first display area close to the host part, and the first binding area 18 is provided with a first source driving chip 13 (for reference Figure 2 and Figure 4 );

[0033] In a direction away from the back plate 1, the second display module comprises a second backlight module 21 and a second display panel 22 stacked together, the light exit surface of the second display panel 22 is arranged away from the host part, in the first direction, the second display panel 22 comprises a second display area and a second binding area 25 located on one side of the second display area, the second binding area 25 is located on the side of the second display area away from the host part, and the second binding area 25 is provided with a second source driving chip 23 (for reference Figure 2 and Figure 5 );

[0034] In the first direction, the side of the back plate 1 close to the host part is provided with a PCB board 2, a first flexible circuit board 14 is arranged between the PCB board 2 and the first binding area 18, and a second flexible circuit board 24 is arranged between the PCB board 2 and the second binding area 25.

[0035] The double-sided display device provided by the embodiment realizes the double-sided display of portable electronic devices such as notebook computers through the arrangement of the first display module and the second display module, the light exit surface of the first display module is arranged towards the host part, and the light exit surface of the second display module is arranged away from the host part, that is, in the opened state, display can be realized through the first display module, and in the closed state, display can be realized through the second display module, which is suitable for various use scenarios and greatly improves the product performance.

[0036] And along the first direction, the backboard 1 is provided with a PCB board 2 near one side of the host part, the display panel in the first display module includes a first display area and a first binding area 18 located near one side of the first display area and the PCB board 2, the first binding area 18 is provided with a first source driving chip 13 for transmitting signals to the first display area, so that when the host part and the display part are in an open state, the picture displayed by the first display area is forward (the signal transmission direction of the first source driving chip 13 is from bottom to top), which is convenient for users to watch. The display panel in the second display module includes a second display area and a second binding area 25 located away from one side of the second display area and the PCB board 2, the second binding area 25 is provided with a second source driving chip 23 for transmitting signals to the second display area, relative to the direction of the user's line of sight, the second source chip is located below after the display part and the host part are closed, the signal transmission direction of the second source driving chip 23 is from bottom to top, so that when the host part and the display part are in a closed state, the picture displayed by the second display area is also forward, which is convenient for users to watch.

[0037] Reference Figure 2 In an exemplary embodiment, along the direction away from the PCB board 2, the second flexible circuit board 24 includes a first part, a second part, a third part and a fourth part in sequence;

[0038] The first part is connected with the PCB board 2 away from one end of the second part, the second part is located between the backboard 1 and the second backlight film group, the third part is located on one side of the second display module away from the PCB board 2, and the fourth part covers the light emitting surface of the second display panel 22 to be connected with the second binding area 25.

[0039] Since the second binding area 25 and the PCB board 2 are located on opposite sides of the second display area respectively, one end of the second flexible circuit board 24 needs to pass through between the backboard 1 and the second backlight module 21, then reversely bend and overlap on the second display panel 22 to be connected with the second binding area 25.

[0040] In an exemplary embodiment, along the light emitting direction of the first display module, the PCB board 2 has opposite first and second sides, the first side is provided with a third binding area 201 connected with the first binding area 18, and the second side is provided with a fourth binding area 202 connected with the second binding area 25.

[0041] The third binding area 201 and the fourth binding area 202 are located on opposite sides of the PCB board 2 and are located on opposite sides in the light-emitting direction of the first display module, so that a narrow frame can be achieved.

[0042] Reference Figure 4 And Figure 5 In an exemplary embodiment, a first backlight connector 17 is arranged on the first side of the PCB board 2, and the first backlight connector 17 is connected to the light bar in the first backlight module 11 through a flexible flat cable (FFC); a second backlight connector 26 is arranged on the second side of the PCB board 2, and the second backlight connector 26 is connected to the light bar in the second backlight module 21 through a flexible flat cable (FFC).

[0043] It should be noted that the flexible flat cable (FFC, Flexible Flat Cable) has the advantages of softness, random bending and folding, thin thickness, small volume, simple connection, convenient disassembly, easy electromagnetic shielding (EMI) and the like. Therefore, when performing light test, the flexible FFC wire is selected for connecting the wire between the PCB board 2 and the first display panel (or the second display panel).

[0044] Reference Figures 3-5 In an exemplary embodiment, a timing control circuit 102 and a backlight control circuit (including a first backlight control unit 15 for lighting the first backlight module 11 and a second backlight control unit 16 for lighting the second backlight module 21) are arranged on the PCB board 2.

[0045] The timing control circuit 102 is configured to output the backlight signal according to a preset rule.

[0046] The backlight control circuit is configured to control the first backlight module 11 and the second backlight module 21 to light up in time according to the backlight signal.

[0047] Taking the application of the double-sided display device in a notebook computer as an example, when the notebook computer is normally used, that is, the notebook computer B face (i.e. the first display module) normally displays, the B face (i.e. the second display module) backlight PWM signal is turned on, and the A face backlight PWM signal is turned off. At this time, only the B face can normally display the picture; when the lid is closed and the A face normally displays, the A face backlight PWM signal is turned on, and the B face backlight PWM signal is turned off. At this time, only the A face can normally display the picture, and since the second source drive chip is located on the DP (lower side) after the lid is closed, it is not necessary to rotate the computer direction to normally display the picture.

[0048] Figure 1A structural schematic diagram of a display part in a conventional technology. The conventional display part has only one display module and can only display on one side. The display module includes a back plate 11, a backlight module 2 and a display panel 3 arranged in layers, the display panel 3 includes a display area and a non-display area located at the periphery of the display area, and a PCB 24 is connected to the non-display area of the display panel through a flexible circuit board 5.

[0049] Figure 2 A structural schematic diagram of a display part in an embodiment of the present application. The display part includes a back plate 1 and first and second display modules located at opposite sides of the back plate 1, and the layer structure in the first display module and the layer structure in the second display module are symmetrically arranged relative to the back plate 1. The structure of the first display module is described in detail below.

[0050] The first display module includes a first backlight module 11 and a first display panel 12 located at the light exit surface of the first backlight module 11. The first backlight module 11 includes a first light guide plate and a plurality of first optical film layers arranged at the light exit surface of the first light guide plate. The second display module includes a second backlight module 21 and a second display panel 22 located at the light exit surface of the second backlight module 21, and the second backlight module 21 includes a second light guide plate and a plurality of second optical film layers arranged at the light exit surface of the second light guide plate. The plurality of first optical film layers and the plurality of second optical film layers are symmetrically arranged relative to the back plate 1.

[0051] In a direction away from the first light guide plate, the plurality of first optical film layers include a diffusion sheet and a prism sheet, the first backlight module 11 includes a light bar, and the light bar is arranged towards a first light entrance surface of the first light guide plate, which is adjacent to or opposite to the light exit surface of the light guide plate.

[0052] When the first light entrance surface is adjacent to the light exit surface of the first light guide plate, the bottom surface of the first light guide plate (a surface opposite to the light exit surface of the first light guide plate) is provided with a reflective sheet, and the side surface of the circumferential surface of the first light guide plate other than the light entrance surface is provided with a reflective sheet.

[0053] When the first light entrance surface is opposite to the light exit surface of the first light guide plate, the circumferential surface of the first light guide plate is provided with a reflective sheet.

[0054] The first display panel 12 includes an array substrate and a color film substrate arranged oppositely, a liquid crystal layer is arranged between the array substrate and the color film substrate, and a frame sealant is arranged around the liquid crystal layer. The array substrate is provided with a gate line, a data line is arranged perpendicularly to the gate line, a pixel area is defined between the gate line and the data line, a thin film transistor and a pixel electrode are arranged in the pixel area. An alignment film and a lower polarizer are further arranged on a side of the array substrate close to the color film substrate. The color film substrate includes a black matrix and a color resin layer (including red resin, green resin and blue resin), and a common electrode corresponding to the pixel electrode on the array substrate. An alignment film and an upper polarizer are further arranged on a side of the common electrode facing the array substrate.

[0055] Figure 3 The display principle block diagram of the first display module or the second display module of the display part. After the image signal is converted into the signal required by the first display module by the system (the host part) through the PCB board 2, it flows to the first GOA unit 109 on the first source driving chip 13 and the first display panel 12 through the first flexible circuit board 14, drives the liquid crystal to flip and realizes image display. The principle of driving and displaying of the display part is specifically introduced below. Figures 3-5

[0056] ​Specifically, the PCB 2 includes a timing control circuit 102, a backlight control circuit, a level conversion circuit 104, and a power management circuit 103. After the host system 101 is powered on, the power management circuit 103 generates a driving voltage of the GOA unit (including a driving voltage of the first GOA unit 109 of the first display panel 12 and a driving voltage of the second GOA unit 110 of the second display panel 22), a logic voltage and an internal driving voltage of the timing control circuit 102, a liquid crystal flipping driving voltage, and a driving voltage of the first source driving chip 13. The host system 101 transmits image data and a PWM backlight signal to the timing control circuit 102 through an eDP interface (eDP (Embedded DisplayPort) is a standard protocol in the field of digital display technology, and the eDP interface is an interface based on the DP architecture and protocol). After receiving the image data, the timing control circuit 102 analyzes and processes the data and transmits the data to the third binding area 201 and the fourth binding area 202 on the opposite sides of the PCB 2, and transmits the GOA timing signal to the level conversion circuit 104 and the PWM backlight signal to the backlight control circuit (including the first backlight control unit 15 and the second backlight control unit 16) in the first backlight module 11 or the second backlight module 21 as needed. After the GOA timing signal is modulated by the power management circuit 103, the GOA unit driving voltage is transmitted to the third binding area 201 and the fourth binding area 202 of the PCB 2. The backlight control circuit modulates and converts the PWM backlight signal into the current of the light bar (including the first light bar 107 of the first backlight module 11 and the second light bar 108 of the second backlight module 21), and transmits the current to the corresponding light bar through the corresponding backlight connector to light the backlight. The signals of the third binding area are transmitted to the GOA unit and the first source driving chip 13 of the first display panel 12 through the first flexible circuit board 14 to control the liquid crystal flipping and realize image display. The signals of the fourth binding area are transmitted to the GOA unit and the second source driving chip 23 of the second display panel 22 through the second flexible circuit board 24 to control the liquid crystal flipping and realize image display.

[0057] In an exemplary embodiment, the back plate 1 is provided with a locking lug 200 close to one side of the PCB 2, the locking lug 200 is provided with a first threaded hole, and the PCB 2 is provided with a second threaded hole matched with the first threaded hole.

[0058] In an exemplary embodiment, the backboard 1 comprises a bottom plate, a first side plate extending from the bottom plate towards the first display module, and a second side plate extending from the bottom plate towards the second display module.

[0059] In an exemplary embodiment, the backboard 1 further comprises a first lug extending from the first side plate towards the inside of the backboard 1, and a second lug extending from the second side plate towards the inside of the backboard 1.

[0060] In an exemplary embodiment, the backboard 1 further comprises a first connecting plate extending from the first side plate towards the outside of the backboard 1, and a second connecting plate extending from the second side plate towards the outside of the backboard 1.

[0061] It can be understood that the above embodiments are only exemplary embodiments adopted for illustrating the principles of the present application, and the present application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the present application, and these modifications and improvements are also considered as the protection scope of the present application.

Claims

1. A double-sided display device, characterized by The display part comprises a backboard and a first display module and a second display module located on opposite sides of the backboard; The first display module comprises a first backlight module and a first display panel in a direction away from the backboard, the light emitting surface of the first display panel is arranged towards the host part, the first display panel comprises a first display area and a first binding area located on one side of the first display area in a first direction, the first binding area is located on the side of the first display area close to the host part, and the first binding area is provided with a first source driving chip; The second display module comprises a second backlight module and a second display panel in a direction away from the backboard, the light emitting surface of the second display panel is arranged away from the host part, the second display panel comprises a second display area and a second binding area located on one side of the second display area in a direction parallel and opposite to the first direction, the second binding area is located on the side of the second display area away from the host part, and the second binding area is provided with a second source driving chip; The backboard is provided with a PCB board on the side close to the host part in the first direction, a first flexible circuit board is arranged between the PCB board and the first binding area, and a second flexible circuit board is arranged between the PCB board and the second binding area.

2. The dual-sided display device of claim 1, wherein, The second flexible circuit board comprises a first part, a second part, a third part and a fourth part in sequence in a direction away from the PCB board; The first part is connected with the PCB board at the end away from the second part, the second part is located between the backboard and the second backlight module, the third part is located on the side of the second display module away from the PCB board, and the fourth part covers the light emitting surface of the second display panel to be bound and connected with the second binding area.

3. The dual-sided display device of claim 1, wherein, The PCB board has opposite first and second sides in the light emitting direction of the first display module, the first side is provided with a third binding area bound and connected with the first binding area, and the second side is provided with a fourth binding area bound and connected with the second binding area.

4. The dual-sided display device of claim 3, wherein, The first side of the PCB board is provided with a first backlight connector connected with a light bar in the first backlight module through a flexible flat cable; The second side of the PCB board is provided with a second backlight connector connected with a light bar in the second backlight module through a flexible flat cable.

5. The dual-sided display device of claim 3, wherein, The PCB board is provided with a timing control circuit and a backlight control circuit; The timing control circuit is used for outputting a backlight signal according to a preset rule; The backlight control circuit is used for controlling the first backlight module and the second backlight module to be lit in time according to the backlight signal.

6. The dual-sided display device of claim 1, wherein, The backboard is provided with a locking lug on the side close to the PCB board, the locking lug is provided with a first threaded hole, and the PCB board is provided with a second threaded hole matched with the first threaded hole.

7. The dual-sided display device of claim 1, wherein, The back plate comprises a bottom plate, four sides of the bottom plate are provided with first side plates extending towards the first display module, the bottom plate and the first side plates enclose a containing cavity for containing the first display module, four sides of the bottom plate are provided with second side plates extending towards the second display module, the bottom plate and the second side plates enclose a containing cavity for containing the second display module.

8. The dual-sided display device of claim 7, wherein, The back plate further comprises a first lug extending inwardly from part of the first side plate, the first lug is parallel to the bottom plate, and a second lug extending inwardly from part of the second side plate, the second lug is parallel to the bottom plate.

9. The dual-sided display device of claim 7, wherein, The back plate further comprises a first connecting plate extending outwardly from part of the first side plate, and a second connecting plate extending outwardly from the second side plate, the first side plate, the second side plate, the first connecting plate and the second connecting plate enclose a containing cavity for containing the PCB.

10. The dual-sided display device of claim 1, wherein, The first backlight module comprises a first light guide plate and a multilayer first optical film layer arranged on the light emitting surface of the first light guide plate, the second backlight module comprises a second light guide plate and a multilayer second optical film layer arranged on the light emitting surface of the second light guide plate, the multilayer first optical film layer and the multilayer second optical film layer are symmetrically arranged with respect to the back plate.

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