CN115019635A - a foldable electronic device - Google Patents

Abstract

The present application relates to a foldable electronic device, including a bendable display screen assembly and a driver chip. The display screen assembly includes an inner screen, at least one outer screen, and a first bendable portion connecting the inner screen and the outer screen. The outer screen It can be bent on the back of the inner screen; along the width direction of the foldable electronic device, the driver chip is arranged at one end of the display screen assembly, the driver chip includes signal lines, and at least part of the signal lines extend along the width direction of the foldable electronic device, and Passing through the inner screen, the first bendable part and the outer screen; the signal line includes a first part passing through the inner screen, a second part passing through the outer screen and a third part passing through the first bendable part, the third The perimeter of the portion is greater than the width of the first bendable portion. The signal wires pass through the inner screen, the first bendable portion and the outer screen, which can simplify the arrangement of the signal wires inside the display screen assembly. The perimeter of the third portion is greater than the width of the first bendable portion, which can reduce the stretching of the signal line during bending and reduce the risk of being broken.

Description

A foldable electronic device

technical field

The present application relates to the technical field of electronic products, and in particular, to a foldable electronic device.

Background technique

With the improvement of people's demand, foldable electronic devices have attracted more and more people's attention and favor. However, the existing foldable electronic device generally includes an outer screen and an inner screen, and the outer screen is located on the back of the inner screen, and is attached to the middle frame on one side to function as a back cover. The inner screen and the outer screen are two independent screens, each with its own independent drive system and device area, which makes the foldable electronic device have many components, complex structure and high cost.

SUMMARY OF THE INVENTION

The present application provides a foldable electronic device, in which the inner screen and the outer screen share one driver chip, which can simplify the wiring structure and thus reduce the production cost.

The present application provides a foldable electronic device, the foldable electronic device includes a bendable display screen assembly and a driver chip, the display screen assembly includes an inner screen, at least one outer screen, and a connection between the inner screen and the the first bendable part of the outer screen, the outer screen can be bent on the back of the inner screen;

Along the width direction of the foldable electronic device, the driver chip is disposed at one end of the display screen assembly, the driver chip includes a signal line, and at least part of the signal line is along the width direction of the foldable electronic device extending through the inner screen, the first bendable portion and the outer screen;

Wherein, the signal line includes a first part passing through the inner screen, a second part passing through the outer screen, and a third part passing through the first bendable part, and the circumference of the third part is The length is greater than the width of the first bendable portion.

In this solution, the signal lines pass through the inner screen, the first bendable portion and the outer screen, so that the inner screen and the outer screen can share one driver chip, and it is beneficial to simplify the arrangement of the signal lines inside the display screen assembly, thereby improving the Production efficiency, reduce production costs. At the same time, the perimeter of the third part of the signal line is larger than the width of the first bendable part. When the first bendable part is bent, the third part has enough margin to bend the signal line, which can reduce bending When the signal line is stretched, the risk of the signal line being broken is reduced.

In a possible design, along the thickness direction of the foldable electronic device, the display screen assembly includes a base substrate and a protective layer, and the signal line is located between the base substrate and the protective layer, and concave toward the direction of the base substrate to form the third portion.

In this solution, the signal line is located between the base substrate and the protective layer, the display screen assembly only includes the third base substrate and the third protective layer at the first bendable portion, and the outer screen area is between the second base substrate and the third protective layer. Other layers are also arranged between the second protective layers, and other layers are also arranged between the first substrate and the first protective layer in the inner screen area. Therefore, the signal lines located in the first bendable portion are located in the third substrate. The base substrate and the third protective layer can be bent. In this embodiment, the third portion is recessed toward the base substrate to form the third portion of the signal line. The perimeter of the recessed third portion is greater than the first bendable portion. Therefore, the design can realize that the perimeter of the third part is larger than the width of the first bendable part, and the design is simple and easy to implement.

In a possible design, the inner screen and the outer screen further include a display layer located between the base substrate and the protective layer, and the first part and the second part are inserted through the display layer.

In this solution, the first part and the second part of the signal line are inserted into the first display layer and the second display layer, and the first bendable part does not include the display layer, that is, the display layer is broken in the area of the first bendable part. open, so the signal line is located between the third base substrate and the third protective layer in the region of the first bendable portion. Here, the signal line extends from the inner screen to the outer screen and passes through the display screen assembly as an example. The side wall where the display layer of the outer screen is disconnected extends between the second display layers and continues to extend until the outer edge of the outer screen. The first bendable portion does not include a display layer, so that the region of the first bendable portion has enough space to accommodate the bent signal lines, and the structure is simple and easy to implement.

In a possible design, the protective layer includes a raised portion, and the raised portion is filled in the third portion.

In this solution, the protruding part and the third protective layer are integrated into one structure, the third part of the signal line is concave in the direction of the base substrate, and the protruding part can fill the concave, limit the swing of the signal line, and improve the connection stability of the signal line to ensure the stable transmission of the signal line.

In another possible design, a filling block is provided between the protective layer and the third part.

In this solution, the structural dimensions of the first protective layer, the second protective layer and the third protective layer are the same, and in the region of the first bendable portion, there is a certain gap between the third protective layer and the third base substrate. The filling block is used to fill the gap, and has a fixed effect on the signal line, thereby limiting the swing of the signal line, improving the connection stability of the signal line, and ensuring the stable signal transmission of the signal line. The design can simplify the structure of the protective layer and simplify the processing technology.

In a possible design, the third part includes a side edge and a bottom edge, and the included angle between the side edge and the bottom edge is an obtuse angle.

In this solution, the third part recessed toward the base substrate includes a side edge and a bottom edge, and the angle α between the side edge and the bottom edge is an obtuse angle, which can reduce the bending degree of the signal line and reduce the excessive bending degree of the signal line. and risk of being broken.

In a possible design, the signal line includes a data driving signal line and a gate driving signal line, and the data driving signal line passes through the inner screen, the first and second screens along the width direction of the foldable electronic device. a bendable part and the outer screen.

In order to further simplify the arrangement of the signal lines, in this example, the data driving signal lines pass through the inner screen, the first bendable portion and the outer screen along the width direction of the foldable electronic device. The data driving signal line passes through the inner screen, the first bendable portion and the outer screen along the width direction of the foldable electronic device, so that the outer screen and the inner screen are electrically connected to the driving chip respectively through the same data driving signal line, which is convenient for passing The same driver chip controls the display of the external screen and the internal screen. Therefore, the data driving signal line passing through the inner screen, the first bendable portion and the outer screen can simplify the connection mode of the driving chip with the inner screen and the outer screen, and reduce the setting of the driving chip.

In a possible design, the gate driving signal line includes a first gate driving signal line and a second gate driving signal line, and the first gate driving signal line is arranged on the edge of the inner screen. On one side or both sides of the foldable electronic device in the length direction, the first gate driving signal line is used to control the display or non-display of the inner screen; the second gate driving signal line is arranged on the display screen assembly Along one side or both sides of the length of the foldable electronic device, the second gate driving signal line is used to control the display or non-display of the external screen.

In this solution, the first gate driving signal line can be set on one side of the inner screen, and the second gate driving signal line can be set on one side of the outer screen. At this time, the gate driving signal line can only drive the inner screen or For external screen display, unilateral driving can reduce the setting of gate driving signal lines. The first gate driving signal line can also be set on both sides of the inner screen, and the second gate driving signal line is also set on both sides of the outer screen. At this time, the gate driving signal line can simultaneously drive the inner screen or the external screen display on both sides. , or both sides of the gate drive signal line alternately drive the display on the inner screen or the outer screen. Bilateral simultaneous driving or bilateral alternate driving can shorten the response time of the internal and external screen displays and reduce the display afterimage effect.

In a possible design, the first gate driving signal line and the second gate driving signal line can control the inner screen and the outer screen to display independently or simultaneously.

In this solution, the main board of the foldable electronic device can send an instruction to the first gate driving line through the driver chip to make the inner screen area controlled by the first gate driving signal line energized, and at the same time, it is electrically connected to the first gate driving signal line. The connected data drive signal line controls the display on the internal screen. The main board of the foldable electronic device can also send an instruction to the second gate driving signal line through the driving chip to make the outer screen area controlled by the second gate driving signal line energized, and at the same time, the second gate driving signal line is electrically connected The data driving signal line controls the display of the external screen area. The above operations can realize the independent display of the inner screen and the outer screen. The judgment condition for the independent display of the inner screen and the outer screen can be set as the opening angle of the inner screen, that is, the inner screen is controlled for display or the outer screen is used for display according to the opening angle of the inner screen. When the opening angle of the inner screen is 180° , the main board sends an instruction to the driver chip to control the inner screen for display. When the opening angle of the inner screen is less than 180°, the main board sends an instruction to the driver chip to control the outer screen for display. The main board of the foldable electronic device can also send instructions to the first gate driving signal line and the second gate driving signal line simultaneously through the driving chip, so that the inner screen area controlled by the first gate driving line and the second gate driving signal The line-controlled outer screen area is energized, and at the same time, the data driving signal lines electrically connected to the first gate driving signal line and the second gate driving signal line control the display of both the inner screen and the outer screen, that is, the inner screen and the outer screen are realized. displayed at the same time.

In another possible design, the inner screen is connected to N outer screens, and the signal lines include N+ gate driving signal lines connected to the inner screen and the N outer screens, each of which is connected to the inner screen and the N outer screens. The gate driving signal lines respectively control the corresponding inner screen and the outer screen to display or not to display.

In this solution, the data driving signal lines pass through the inner screen, the N outer screens, and the N first bendable parts between the inner screen and the outer screen, so the main board sends out the N+ gate driving signal lines respectively through the driving chip. At the same time, the data driving signal lines electrically connected with the N+ gate driving signal lines can respectively control the inner screen and the N outer screens to display or not display respectively.

In yet another possible design, the outer screen and the inner screen have different sizes along the length direction.

In this solution, along the length direction of the foldable electronic device, the size of the outer screen is different from the size of the inner screen, that is, the outer screen and the inner screen can be made into special-shaped screens, which saves the materials of the display screen components, reduces the cost, and meets the customer's requirements. different needs.

It is to be understood that the foregoing general description and the following detailed description are exemplary only and do not limit the application.

Description of drawings

FIG. 1 is a schematic structural diagram of a foldable electronic device provided by the application in one embodiment;

FIG. 2 is a schematic diagram of the internal structure of the foldable electronic device in FIG. 1 in one embodiment;

FIG. 3 is a cross-sectional view of the display screen assembly in FIG. 2 along the direction A-A in one embodiment;

FIG. 4 is a schematic diagram of the dimensioning of the bendable portion area in FIG. 3;

5 is a cross-sectional view of the display screen assembly in FIG. 2 along the direction A-A in another embodiment;

6 is a schematic structural diagram of the foldable electronic device provided by the application in another embodiment;

FIG. 7 is a schematic structural diagram of the foldable electronic device provided by the present application in yet another embodiment.

Reference number:

1- Display assembly;

11-Inner screen;

111—the first base substrate;

112 - the first protective layer;

113 - the first display layer;

114 - body part;

115 - extension;

116 - the second bendable part;

12-External screen;

121—the second base substrate;

122 - the second protective layer;

123 - the second display layer;

13- the first bendable part;

131—the third base substrate;

132 - the third protective layer;

132a - raised part;

132b - padding block;

2- driver chip;

21-signal line;

211 - data drive signal line;

211a - Part I;

211b - Part II;

211c - Part III;

211c1 - side;

211c2 - bottom edge;

212—the first gate drive signal line;

213 - the second gate drive signal line;

3-Flexible circuit board;

4-back cover;

C - perimeter;

S - the width of the first bendable part;

α-Included angle.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

Detailed ways

In order to better understand the technical solutions of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

An embodiment of the present application provides a foldable electronic device. An embodiment of the present application provides an electronic device as shown in FIG. 1 . The foldable electronic device includes, for example, a mobile phone, a tablet computer, a personal digital assistant (PDA), a notebook Computers, in-vehicle computers, foldable display devices, foldable displays, wearable devices, and any other device that has a foldable screen function. The embodiments of the present application do not specifically limit the specific form of the above-mentioned foldable electronic device. For the convenience of description, the following description takes the foldable electronic device as a mobile phone as an example, and the electronic device of the present application is described below with specific embodiments.

In order to describe the foldable electronic device in this application more clearly, define the width direction of the foldable electronic device as W, the length direction of the foldable electronic device as L, and the thickness direction of the foldable electronic device as H. Meanwhile, the width direction W, the length direction L and the thickness direction H of the above-mentioned foldable electronic device all refer to the directions when the foldable electronic device is in the unfolded state.

As shown in FIG. 1 , the foldable electronic device includes a bendable display screen assembly 1 , and the display screen assembly 1 includes an inner screen 11 , at least one outer screen 12 , and a first bendable portion connecting the inner screen 11 and the outer screen 12 13. The outer screen 12 can be bent on the back of the inner screen 11; as shown in FIG. At one end, the driver chip 2 includes a signal line 21, and at least part of the signal line 21 extends along the width direction of the foldable electronic device and passes through the inner screen 11, the outer screen 12 and the first bendable portion 13; wherein, as shown in FIG. 3 4, the signal line 21 includes a first portion 211a passing through the inner screen 11, a second portion 211b passing through the outer screen 12 and a third portion 211c passing through the first bendable portion 13, the third portion 211c The perimeter C of is greater than the width of the first bendable portion 13 .

The foldable electronic device further includes a back cover 4, which can improve the sealing performance of the foldable electronic device, reduce the risk of moisture, dust, etc.

It should be noted that when the display screen assembly 1 includes an inner screen 11 and a plurality of outer screens 12, the inner screen 11 and the outer screen 12 are connected through the first bendable portion 13, and the plurality of outer screens 12 can be arranged on the inner screen 11 on the same side or both sides, when multiple outer screens 12 are arranged on the same side of the inner screen 11, the outer screen 12 and the inner screen 11 are connected by the first bendable portion 13, and the outer screen 12 and the outer screen 12 are connected. They are also connected by the first bendable portion 13 . The following only describes in detail the case where the foldable electronic device includes an outer screen 12 .

The inner screen 11 itself can be bent, so that the inner screen 11 has two states of being folded or unfolded. The outer screen 12 is bent on the back of the inner screen 11 through the first bendable portion 13 . When the inner screen 11 is folded, the volume of the foldable electronic device can be reduced, which is convenient for storage and carrying, and the outer screen is located on the back of the inner screen 11 . 12 can be used to display images or video information, etc., to meet the needs of users; when the inner screen 11 is unfolded, the display area of the inner screen 11 is larger than the outer screen 12, so the inner screen 11 can be used to display images or video information, etc., to increase the user's viewing experience.

It should be noted that, along the width direction of the foldable electronic device, the driving chip 2 is arranged at one end of the display screen assembly 1, and when the driving chip 2 is arranged at one end of the inner screen 11, the passing order of the signal lines 21 is: The inner screen 11, the first bendable portion 13 and the outer screen 12; when the driver chip 2 is arranged at one end of the outer screen 12, the passing sequence of the signal lines 21 is: pass through the outer screen 12, the first bendable portion part 13 and inner screen 11.

As shown in FIG. 2 , the portion of the signal line 21 passing through the inner screen 11 is defined as the first portion 211 a , the portion of the signal line 21 passing through the outer screen 12 is defined as the second portion 211 b , and the signal line 21 passing through the first bendable portion 13 The part is the third part 211c. As shown in FIG. 4 , the perimeter C of the third part 211c is the sum of the lengths C1 and C2 of the two sides 211c1 and the length C3 of the bottom edge 211c2. The width is S. Obviously, the perimeter C of the third portion 211c is greater than the width of the first bendable portion 13 . When the first bendable portion 13 is bent, the third portion 211c has enough margin to allow the signal line 21 Bending can reduce the stretching of the signal line 21 during bending, and reduce the risk of the signal line 21 being broken.

As shown in FIG. 2 , the signal lines 21 drawn from the driving chip 2 generally include data driving signal lines 211 and gate driving signal lines, and at least part of the signal lines 21 pass through the inner screen 11 , the first bendable portion 13 and the outer screen 12, refers to one of the gate driving signal line and the data driving signal line 211 passing through the inner screen 11, the first bendable portion 13 and the outer screen 12 along the width direction of the foldable electronic device. The signal wire 21 passes through the inner screen 11 , the first bendable portion 13 and the outer screen 12 , so that the inner screen 11 and the outer screen 12 can share one driver chip 2 , and it is beneficial to simplify the signal wire 21 inside the display screen assembly 1 . Arrangement, thereby improving production efficiency and reducing production costs.

The specific arrangement of the signal lines 21 in the display screen assembly 1 will be described in detail below. Along the thickness direction of the foldable electronic device, as shown in FIGS. 3 and 5 , the display screen assembly 1 includes a substrate substrate and a protective layer. The signal lines 21 The third portion 211c is formed between the base substrate and the protective layer and is recessed toward the base substrate.

As shown in FIG. 3 and FIG. 5 , the base substrate includes a first base substrate 111 located in the area of the inner screen 11 , a second base substrate 121 located in the area of the outer screen 12 , and a third substrate located in the area of the bendable portion Substrate 131 . Similarly, the protective layer includes a first protective layer 112 in the area of the inner screen 11 , a second protective layer 122 in the area of the outer screen 12 , and a third protective layer 132 in the area of the bendable portion.

In this embodiment, the signal line 21 is located between the base substrate and the protective layer, the display screen assembly 1 only includes the third base substrate 131 and the third protective layer 132 in the first bendable portion 13 , and the outer screen 12 area Other layers are also arranged between the second base substrate 121 and the second protective layer 122, and other layers are also arranged between the first base substrate 111 and the first protective layer 112 in the area of the inner screen 11. The signal line 21 of a bendable portion 13 can be bent between the third base substrate 131 and the third protective layer 132. In this embodiment, the third portion 211c is recessed toward the base substrate to form the signal line 21. For the third portion 211c, the perimeter C of the recessed third portion 211c is greater than the width of the first bendable portion 13, so this design can realize that the perimeter C of the third portion 211c is greater than the width of the first bendable portion 13 , and the design is simple and easy to implement.

Specifically, as shown in FIG. 3 and FIG. 5 , the inner screen 11 and the outer screen 12 further include a display layer between the base substrate and the protective layer, and the first part 211a and the second part 211b are inserted into the display layer.

As shown in FIGS. 3 and 5 , the display layer includes a first display layer 113 located in the area of the inner screen 11 and a second display layer 123 located in the area of the outer screen 12 .

In this embodiment, the first portion 211a and the second portion 211b of the signal line 21 are inserted into the first display layer 113 and the second display layer 123, and the first bendable portion 13 does not include the display layer, that is, the display layer is in the first display layer 113 and the second display layer 123. The area of the bendable portion 13 is disconnected, so the signal line 21 is located between the third base substrate 131 and the third protective layer 132 in the area of the first bendable portion 13 . Here, the signal line 21 extends from the inner screen 11 to the outer screen 12 and passes through the display screen assembly 1 as an example for illustration. The third portion 211c may continue to extend along the side wall where the display layer of the inner screen 11 is disconnected to connect with the third lining. The bottom substrate 131 contacts and then extends between the second display layers 123 along the sidewall where the display layer of the outer screen 12 is disconnected and continues to extend until the outer edge of the outer screen 12 . The first bendable portion 13 does not include a display layer, so that the area of the first bendable portion 13 has enough space to accommodate the bent signal line 21 , and the structure is simple and easy to implement. The display layer generally includes a pixel unit composed of an anode layer, an organic material functional layer and a cathode layer, and the first bendable portion 13 does not include a display layer, so the first bendable portion 13 cannot be used for displaying images.

Of course, the first bendable portion 13 can also be displayed, that is, the position of the first bendable portion 13 also includes a pixel unit composed of an anode layer, an organic material functional layer and a cathode layer.

It should be noted that the substrate substrate includes a substrate and an organic film or inorganic film deposited on the substrate. The substrate can be plexiglass, resin, quartz, metal and other materials. ), the organic film or inorganic film deposited on the substrate can be a thin film transistor (Thin Film Transistor, TFT). The protective layer is generally a planarizing layer (Planarizing, PLN layer for short), and the protective layer can be made of acrylic material. The display layer is located between the base substrate and the protective layer, and the protective layer covers the display layer and plays the role of insulating and sealing the display layer.

In one embodiment, as shown in FIG. 3 , the third protective layer 132 includes a raised portion 132a, and the raised portion 132a is filled in the third portion 211c.

In this embodiment, the protruding portion 132a and the third protective layer 132 are integral structures, the third portion 211c of the signal line 21 is recessed toward the base substrate, and the protruding portion 132a can fill the recess and limit the swing of the signal line 21 , to improve the connection stability of the signal line 21 and ensure the stable signal transmission of the signal line 21 .

In another embodiment, as shown in FIG. 5 , a filling block 132b is provided between the third protective layer 132 and the third portion 211c.

In this embodiment, the structural dimensions of the first protective layer 112 , the second protective layer 122 and the third protective layer 132 are the same, and in the region of the first bendable portion 13 , the third protective layer 132 and the third base substrate 131 There is a certain gap between them, and the filling block 132b is used to fill the gap and play a fixed role on the signal line 21, thereby limiting the swing of the signal line 21, improving the connection stability of the signal line 21, and ensuring the stable transmission of the signal line 21. Signal. The design can simplify the structure of the protective layer and simplify the processing technology.

Specifically, as shown in FIGS. 3 and 4 , the third portion 211c includes a side edge 211c1 and a bottom edge 211c2 , and the included angle α between the side edge 211c1 and the bottom edge 211c2 is an obtuse angle.

In this embodiment, the third portion 211c recessed toward the base substrate includes a side edge 211c1 and a bottom edge 211c2, and the included angle α between the side edge 211c1 and the bottom edge 211c2 is an obtuse angle, which can reduce the bending degree of the signal line 21 and reduce the There is a risk that the signal line 21 is bent too much and is broken.

In order to make the angle α between the side edge 211c1 and the bottom edge 211c2 an obtuse angle, as shown in FIG. 4 , on the premise that the bottom edge 211c2 , that is, the plane where the third base substrate 131 is located, remains horizontal, the side edge 211c1 may have a certain inclination Therefore, the section of the display layer between the inner screen 11 and the first bendable portion 13 and between the outer screen 12 and the first bendable portion 13 can be designed as inclined planes, so the signal lines 21 can be arranged along the inclined planes. The included angle α with the bottom edge 211c2 is kept as an obtuse angle.

As shown in FIG. 2 , the signal line 21 includes a data driving signal line 211 and a gate driving signal line. The data driving signal line 211 passes through the inner panel 11 , the first bendable portion 13 and the outer panel 12 .

In order to further simplify the arrangement of the signal lines 21 , in this example, the data driving signal lines 211 pass through the inner screen 11 , the first bendable portion 13 and the outer screen 12 along the width direction of the foldable electronic device. The data driving signal line 211 passes through the inner screen 11 , the first bendable portion 13 and the outer screen 12 along the width direction of the foldable electronic device, so that the outer screen 12 and the inner screen 11 pass through the same data driving signal line 211 and are respectively connected to the driver. The chip 2 is electrically connected, so that the display of the outer screen 12 and the inner screen 11 can be controlled conveniently through the same driving chip 2 . Therefore, the data driving signal line 211 passing through the inner panel 11 , the first bendable portion 13 and the outer panel 12 can simplify the connection of the driver chip 2 to the inner panel 11 and the outer panel 12 and reduce the arrangement of the driver chip 2 .

As shown in FIG. 2 , there are also gate driving signal lines drawn from the driving chip 2 , and the gate driving signal lines include a first gate driving signal line 212 and a second gate driving signal line 213 , and the first gate driving signal line 213 . The line 212 is arranged on one side or both sides of the inner screen 11 along the length direction of the foldable electronic device. The first gate driving signal line 212 is used to control the display or non-display of the inner screen 11; the second gate driving signal line 213 is arranged on the On one side or both sides of the display screen assembly 1 along the length direction of the foldable electronic device, the second gate driving signal line 213 is used to control the display or non-display of the external screen 12 .

In this embodiment, the first gate driving signal line 212 can be arranged on one side of the inner screen 11, and the second gate driving signal line 213 can be arranged on one side of the outer screen 12. In this case, only a single gate driving signal line can be arranged. While driving the inner panel 11 or the outer panel 12 to display, the unilateral driving can reduce the setting of gate driving signal lines. The first gate driving signal lines 212 can also be arranged on both sides of the inner screen 11, and the second gate driving signal lines 213 are also arranged on both sides of the outer screen 12. At this time, the gate driving signal lines can simultaneously drive the inner screen on both sides. 11 or the outer screen 12 to display, or alternately drive the inner screen 11 or the outer screen 12 to display on both sides of the gate drive signal line. Bilateral simultaneous driving or bilateral alternate driving can shorten the display response time of the inner screen 11 and the outer screen 12 and reduce the display afterimage effect.

Specifically, as shown in FIG. 2 , the first gate driving signal line 212 and the second gate driving signal line 213 can control the inner screen 11 and the outer screen 12 to display independently or simultaneously.

It should be noted that the gate driving signal line and the data driving signal line 211 are electrically connected, and the two work together to control the display of the inner screen 11 and the outer screen 12 .

In this embodiment, the main board of the foldable electronic device can send an instruction to the first gate driving line through the driving chip 2 to make the area of the inner screen 11 controlled by the first gate driving signal line 212 energized, and at the same time communicate with the first gate driving line. The data driving signal line 211 electrically connected to the driving signal line 212 controls the display of the internal screen 11 . The main board of the foldable electronic device can also send an instruction to the second gate driving signal line 213 through the driving chip 2 to make the area of the outer screen 12 controlled by the second gate driving signal line 213 energized, and at the same time, the second gate driving signal line 213 is powered on. The data driving signal line 211 electrically connected to the line 213 controls the area display of the external screen 12 . The above operations can realize the independent display of the inner screen 11 and the outer screen 12 . The judgment condition for the independent display of the inner screen 11 and the outer screen 12 can be set as the opening angle of the inner screen 11, that is, the inner screen 11 is controlled for display or the outer screen 12 is used for display according to the opening angle of the inner screen 11. When the inner screen 11 When the opening angle is 180°, the mainboard sends an instruction to the driver chip 2 to control the inner screen 11 for display; when the opening angle of the inner screen 11 is less than 180°, the mainboard sends an instruction to the driver chip 2 to control the outer screen 12 for display. The main board of the foldable electronic device can also send instructions to the first gate driving signal line 212 and the second gate driving signal line 213 through the driver chip 2 at the same time, so that the area of the inner screen 11 controlled by the first gate driving line and the second gate driving signal line 213 The area of the outer screen 12 controlled by the gate driving signal line 213 is energized, and at the same time, the data driving signal line 211 electrically connected to the first gate driving signal line 212 and the second gate driving signal line 213 controls the inner screen 11 and the outer screen 12 are displayed, that is, the inner screen 11 and the outer screen 12 are displayed at the same time.

It should be noted that, as shown in FIG. 2 , FIG. 6 and FIG. 7 , the inner screen 11 includes a body portion 114 and an extension portion 115 , and the body portion 114 and the extension portion 115 are connected by the second bendable portion 116 , so that the The extension portion 115 can be bent on the back of the main body portion 114 . The structure of the second bendable portion 116 is the same as that of the first bendable portion 13 . The setting of the bending portion 13 is also the same, and details are not repeated here. The driver chip 2 is arranged on the extension part 115 , the extension part 115 is electrically connected to the main board through the flexible printed circuit board 3 (FPC), and is electrically connected to the main board through the extension part 115 bent on the back of the main body part 114 , which is beneficial to realize the Narrow edge design of foldable electronic devices. The electrical connection method between the extension portion 115 and the main board is not limited to the flexible circuit board 3 , and may also be other electrical connection methods such as industrialized liquid crystal polymer (Liquid Crystal Polymer, LCP).

The above embodiment mainly discusses the case where the inner screen 11 is connected to an outer screen 12. By extension, as shown in FIG. 6, the inner screen 11 can be connected with N outer screens 12, and the signal lines 21 include N+1 and the inner screen 12. The gate driving signal lines connecting the screen 11 and the N outer screens 12, each gate driving signal line respectively controls the corresponding inner screen 11 and the outer screen 12 to display or not to display.

In this embodiment, the data driving signal line 211 passes through the inner screen 11 , the N outer screens 12 , and the N first bendable portions 13 between the inner screen 11 and the outer screen 12 , so the main board drives the chip 2 to the N first bendable portion 13 . The +1 gate driving signal lines respectively issue commands, and at the same time, the data driving signal lines 211 electrically connected to the N+1 gate driving signal lines can respectively control the inner screen 11 and the N outer screens 12 to display or not display respectively. .

In the above embodiments, as shown in FIGS. 2 and 6 , the dimensions of the outer screen 12 and the inner screen 11 along the length direction of the foldable electronic device are the same, or the dimensions of the outer screen 12 and the inner screen 11 may be exactly the same. The size of the outer screen 12 is not limited. As shown in FIG. 7 , the size of the outer screen 12 and the inner screen 11 along the length direction of the foldable electronic device may also be different.

In the embodiment shown in FIG. 7 , along the length direction of the foldable electronic device, the size of the outer screen 12 is different from the size of the inner screen 11 , that is, the outer screen 12 and the inner screen 11 can be made into special-shaped screens to save the display screen The material used for component 1 can reduce costs and meet the different needs of customers.

In addition, the present application does not limit the shapes of the outer screen 12 and the inner screen 11, which may be in various shapes such as square and circle.

It should be noted that a part of this patent application file contains content protected by copyright. Except for making copies of the patent files of the Patent Office or the contents of the recorded patent files, the copyright owner reserves the right to copyright.

Claims (11)

1. A foldable electronic device, characterized in that the foldable electronic device comprises a bendable display screen assembly and a driver chip, and the display screen assembly comprises an inner screen, at least one outer screen and a connection to the inner screen and the first bendable portion of the outer screen, the outer screen can be bent on the back of the inner screen; Along the width direction of the foldable electronic device, the driver chip is disposed at one end of the display screen assembly, the driver chip includes a signal line, and at least part of the signal line is along the width direction of the foldable electronic device extending through the inner screen, the first bendable portion and the outer screen; Wherein, the signal line includes a first part passing through the inner screen, a second part passing through the outer screen, and a third part passing through the first bendable part, and the circumference of the third part is The length is greater than the width of the first bendable portion. 2 . The foldable electronic device according to claim 1 , wherein, along the thickness direction of the foldable electronic device, the display screen assembly comprises a base substrate and a protective layer, and the signal line is located on the base plate. 3 . The third portion is formed between the base substrate and the protective layer and is recessed in the direction of the base substrate. 3 . The foldable electronic device according to claim 2 , wherein the inner screen and the outer screen further comprise a display layer located between the base substrate and the protective layer, and the first part and the second portion is interspersed in the display layer. 4 . The foldable electronic device according to claim 2 , wherein the protective layer comprises a protruding portion, and the protruding portion is filled in the third portion. 5 . 5. The foldable electronic device according to claim 2, wherein a filling block is provided between the protective layer and the third part. 6 . The foldable electronic device according to claim 2 , wherein the third part comprises a side edge and a bottom edge, and an included angle between the side edge and the bottom edge is an obtuse angle. 7 . 7 . The foldable electronic device according to claim 1 , wherein the signal lines comprise data driving signal lines and gate driving signal lines, and the data driving signal lines are along a width direction of the foldable electronic device. 8 . Pass through the inner screen, the first bendable portion, and the outer screen. 8 . The foldable electronic device according to claim 7 , wherein the gate driving signal line comprises a first gate driving signal line and a second gate driving signal line, and the first gate driving signal line The line is arranged on one side or both sides of the inner screen along the length direction of the foldable electronic device, and the first gate driving signal line is used to control the display or non-display of the inner screen; The second gate drive signal line is arranged on one side or both sides of the display screen assembly along the length direction of the foldable electronic device, and the second gate drive signal line is used to control the external screen display or Do not show. 9 . The foldable electronic device according to claim 8 , wherein the first gate driving signal line and the second gate driving signal line can control independent display of the inner screen and the outer screen. 10 . or both. 10 . The foldable electronic device according to claim 1 , wherein the inner screen is connected with N outer screens, and the signal line includes N+1 and the inner screen. 11 . The gate driving signal lines connected to the screen and the N outer screens, each of the gate driving signal lines respectively controls the corresponding inner screen and the outer screen to display or not to display. 11. The foldable electronic device according to any one of claims 1-10, wherein the outer screen and the inner screen have different sizes along the length direction.

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