CN109616020B - Flexible display panel and display device - Google Patents
Flexible display panel and display device Download PDFInfo
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- CN109616020B CN109616020B CN201910091953.6A CN201910091953A CN109616020B CN 109616020 B CN109616020 B CN 109616020B CN 201910091953 A CN201910091953 A CN 201910091953A CN 109616020 B CN109616020 B CN 109616020B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
Abstract
The invention provides a flexible display panel, which comprises a flexible substrate, wherein the flexible display panel comprises at least one deformation detection module arranged on the flexible substrate, and the deformation detection module can detect the deformation state of the flexible display panel and output a corresponding detection signal according to the deformation state. The invention also provides a display device, and the flexible display panel still has a good display effect when deformed.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display panel and a display device comprising the same.
Background
The organic electroluminescent display panel gradually becomes the mainstream of the display field by virtue of the properties of low power consumption, high color saturation, wide viewing angle, thin thickness, flexibility and the like. Among them, as the flexible process is developed, the user demand of the flexible display device is also increasing. After the existing flexible organic electroluminescent display panel is bent, the display area has bad conditions of moire (mura), figure distortion and figure distortion, and the display effect is influenced.
Therefore, how to provide a flexible display panel with good display effect when deformed is an urgent problem to be solved.
Disclosure of Invention
The invention aims to provide a flexible display panel and a display device comprising the flexible display panel, wherein the flexible display panel still has a good display effect when being deformed.
To solve the above technical problem, as a first aspect of the present invention, a flexible display panel is provided, which includes a flexible substrate, wherein the flexible display panel includes at least one deformation detection module disposed on the flexible substrate, and the deformation detection module is capable of detecting a deformation state of the flexible display panel and outputting a corresponding detection signal according to the deformation state.
Preferably, the flexible substrate includes a first sub-flexible substrate and a second sub-flexible substrate which are stacked, and the deformation detection module is disposed between the first sub-flexible substrate and the second sub-flexible substrate.
Preferably, the flexible substrate comprises a first edge extending along a first direction, a second edge extending along a second direction, and a preset deformation region, wherein the first direction intersects with the second direction, the extension direction of the deformation region is consistent with the second direction,
the deformation detection module comprises a first input end, a second input end, a first output end, a second output end, a first detection line, a second detection line, a first resistor and a second resistor,
wherein the first probe line extends along a first direction, the second probe line extends along a second direction, the first input terminal is configured to receive a detection driving signal, the second input terminal is configured to receive a reference driving signal, the detection signal includes a first detection signal and a second detection signal, the first output terminal is configured to output the first detection signal, and the second output terminal is configured to output the second detection signal,
one end of the first probe line is formed as the first input end, one end of the second probe line is electrically connected to the first input end, the other end of the second probe line is formed as the first output end, one end of the first resistor is electrically connected to the first output end, the other end of the first resistor is formed as the second input end, one end of the second resistor is electrically connected to the second input end, the other end of the second resistor is formed as the second output end, and the other end of the first probe line is electrically connected to the second output end.
Preferably, the flexible display panel includes a plurality of the deformation detection modules,
the first detection lines of the deformation detection modules are arranged at intervals in an insulating manner;
and the second detection lines of the plurality of deformation detection modules are arranged at intervals in an insulating manner.
Preferably, the plurality of first detection lines are arranged in parallel at intervals, or the plurality of first detection lines are arranged along the same straight line at intervals;
many the second detection line parallel interval sets up, perhaps, many the second detection line sets up along same straight line interval.
As a second aspect of the present invention, a display device is provided, which includes a flexible display panel, where the flexible display panel is the flexible display panel provided in the present invention, and the display device includes a deformation determining module, where the deformation determining module is configured to determine a deformation state of the flexible display panel according to the detection signal.
Preferably, the display device further comprises a flexible driving circuit, the flexible driving circuit comprises a detection driving module and a reference driving module,
the detection driving module is used for providing a detection driving signal for a first input end of the deformation detection module, and the reference driving module is used for providing a reference driving signal for a second input end of the deformation detection module.
Preferably, the display device further includes a control module, a brightness adjustment module and a display area adjustment module, the flexible display panel includes a fixed portion and a bent portion, the bent portion can be bent with respect to the fixed portion, and when the bent portion is bent, the fixed portion is fixed, the deformation state includes a bent included angle between the bent portion of the flexible display panel and the fixed portion, the deformation determination module is configured to determine the bent included angle according to the detection signal and determine a relationship between the bent included angle and a preset angle;
when the bending included angle is smaller than the preset angle: the brightness adjusting module can increase the brightness of the bent part, and/or the display area adjusting module can control the bent part not to display, and the fixing part displays the whole picture to be displayed.
Preferably, the display device further comprises a camera and a viewpoint determining module, the camera is used for acquiring an image in a space right opposite to the display surface of the display panel, and the viewpoint determining module is used for determining the position coordinates of human eyes according to the image acquired by the camera;
the brightness adjusting module is used for adjusting the display brightness of each part of the display panel according to the position coordinates of human eyes.
Preferably, the display device further comprises a command receiving module and a mechanical driving module,
the command receiving module is used for analyzing the received voice control command and outputting an analysis result; and the control module controls the mechanical driving module to drive the display device to deform according to the analysis result.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a flexible display panel according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a flexible display panel according to a second embodiment of the present invention;
fig. 3a to 3b are schematic structural diagrams of a flexible display panel according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a fourth embodiment of a flexible display panel provided in the present invention;
fig. 5 is a schematic diagram of an equivalent circuit structure of the deformation detection module of the flexible display panel provided by the present invention;
FIG. 6 is a schematic structural diagram of a display device according to a first embodiment of the present invention;
FIG. 7 is a schematic view of the cross-sectional structure A-A of FIG. 1;
FIG. 8 is a schematic view of a display device according to the present invention in a deformed state;
fig. 9 is a driving display flow diagram of the display device provided by the present invention;
FIG. 10 is a schematic flow chart of a method for manufacturing a flexible display panel according to the present invention;
fig. 11 is a detailed flowchart of step S1 in fig. 10.
Description of the reference numerals
100: flexible display panel 110: flexible substrate
111: first sub-flexible substrate 112: second sub-flexible substrate
120: first probe line 130: second detection line
140: bending area 150: display structure
160: outer land 200: display device
210: display area 220: rims
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The inventor of the present invention finds that the reason why the display area has the bad conditions of moire, figure distortion and figure distortion after the existing flexible organic electroluminescent display panel is bent is that:
when the display panel is bent, different areas in the display area can generate different visual angles relative to consumers, and the bad conditions of display moire, figure distortion and the like are caused due to the difference between the different display areas and the original visual angles.
For this reason, the inventor considers that the above display defects of the display panel can be reduced or even eliminated by detecting the bending angle of the flexible organic electroluminescent display panel and adjusting the display area or the display brightness of the flexible organic electroluminescent display panel according to the bending angle, and then how to detect the bending angle of the display panel becomes a key for solving the problem.
In view of this, as an aspect of the present invention, there is provided a flexible display panel, as shown in fig. 1, the flexible display panel 100 includes a flexible substrate 110, wherein the flexible display panel 100 includes at least one deformation detection module disposed on the flexible substrate 110, and the deformation detection module is capable of detecting a deformation state of the flexible display panel 100 and outputting a corresponding detection signal according to the deformation state.
As described above, by providing the deformation detection module in the flexible substrate 110, when the display panel is bent, for example, along the bending region 140, the deformation detection module can detect the bending state of the flexible display panel 100 and output a detection signal corresponding to the bending state, which can reflect the bending state of the flexible display panel 100.
Generally, a display device including the display panel includes a deformation determining module and a control module (e.g., a CPU), where the deformation determining module can determine a deformation state of the flexible display panel according to the detection signal, and the control module can adjust a display effect of the display panel according to the deformation state, so as to reduce or even eliminate a bad situation of moire, distortion and distortion of a display area.
In the present invention, as a preferred embodiment, as shown in fig. 7, the flexible substrate 110 includes a first sub flexible substrate 111 and a second sub flexible substrate 112 which are stacked, and the deformation detection module is disposed between the first sub flexible substrate 111 and the second sub flexible substrate 112.
The arrangement of the detection module in the embodiment shown in fig. 7 is easy to manufacture, for example, the deformation detection module may be formed on the first sub-flexible substrate 111 first, then the display structure of the display panel, such as a transistor layer, an organic light emitting function film layer, etc., is formed on the second sub-flexible substrate 112, and finally the first flexible substrate 111 and the second sub-flexible substrate 112 are attached to form the flexible display panel 100, so as to avoid adverse effects on the deformation detection module due to different preparation processes of different film layers in a layer-by-layer preparation manner.
In the above embodiment, the deformation detection module is provided on the flexible substrate, and can have a good detection sensitivity.
In the present invention, the material for manufacturing the flexible substrate is not limited, and for example, the material for manufacturing the flexible substrate may be preferably polyimide.
Further preferably, the thickness of each of the first sub flexible substrate and the second sub flexible substrate is 100nm to 10 μm.
In the present invention, as an alternative embodiment, as shown in fig. 1, the flexible substrate 110 includes a first edge extending along a first direction Y, a second edge extending along a second direction X, and a predetermined deformation region, where the first direction Y intersects the second direction X, and an extending direction of the deformation region coincides with the second direction.
In fig. 1 to 4 and 6, the hatched rectangular frame is the "preset deformation region".
In the embodiment shown in fig. 1, the first direction Y and the second direction X are only used for understanding the technical solution of the present invention, and do not limit the present invention.
Further, IN the present invention, the configuration of the deformation detection module is not particularly limited, for example, as a preferred embodiment, as shown IN fig. 5, the deformation detection module includes a first input terminal IN-1, a second input terminal IN-2, a first output terminal OUT-1, a second output terminal OUT-2, a first detection line 120, a second detection line 130, a first resistor R1 and a second resistor R2.
As shown in fig. 1, the first probe line 120 extends along a first direction Y, the second probe line 130 extends along a second direction X, the first input terminal is configured to receive a detection driving signal, and the second input terminal is configured to receive a reference driving signal; the detection signal output by the deformation detection module comprises a first detection signal and a second detection signal, a first output end is used for outputting the first detection signal, and a second output end is used for outputting the second detection signal.
Specifically, as shown IN FIG. 5, one end of the first probe line 120 is formed as a first input terminal IN-1, one end of the second probe line 130 is electrically connected to the first input terminal IN-1, the other end of the second probe line 130 is formed as a first output terminal OUT-1, one end of the first resistor R1 is electrically connected to the first output terminal OUT-1, the other end of the first resistor R1 is formed as a second input terminal IN-2, one end of the second resistor R2 is electrically connected to the second input terminal IN-2, the other end of the second resistor R2 is formed as a second output terminal OUT-2, and the other end of the first probe line 120 is electrically connected to the second output terminal OUT-2.
It should be noted that the first resistor R1 and the second resistor R2 are not limited in the present invention, for example, as a first alternative embodiment, the first resistor R1 and the second resistor R2 may be constant value resistors; as a second alternative, the first resistor R1 and the second resistor R2 may be the same material as the first probe line 120 or the second probe line 130.
In the second alternative embodiment, it is required to ensure that the first resistor R1 and the second resistor R2 are not bent when the flexible display panel is bent, so as to ensure that the resistance values of the first resistor R1 and the second resistor R2 are not changed.
In the embodiment shown in fig. 5, the first probe line 120, the second probe line 130, the first resistor R1 and the second resistor R2 are electrically connected to form an electrical bridge, and in combination with the distribution structure of the first probe line 120 and the second probe line 130 shown in fig. 1, when the flexible display panel 100 is bent along the bending region 140, the first probe line 120 is deformed, the second probe line 130 is not deformed, and due to the material characteristics of the first probe line 120 and the second probe line 130, the resistance value of the first probe line 120 is changed when the first probe line 120 is deformed.
Based on the principle of the change of the resistance of the detection line, when the flexible display panel of the bridge shown IN fig. 5 is powered on for displaying, the first input terminal IN-1 receives the detection driving signal, the second input terminal IN-2 receives the reference driving signal, and the first output terminal OUT-1 and the second output terminal OUT-2 are electrically connected to respective receiving terminals (e.g., signal receiving terminals of the amplifying circuit) for detecting the signal.
When the flexible display panel 100 is bent along the bending region 140, the first probe line 120 is deformed, so that the resistance value of the first probe line 120 is changed, and the resistance value of the second probe line 130, the resistance value of the first resistor R1, and the resistance value of the second resistor R2 are not deformed, so that the resistance values are not changed, at this time, the first output terminal OUT-1 of the deformation detection module outputs the first detection signal, and the second output terminal OUT-2 outputs the second detection signal.
Here, it should be noted that, in the non-deformed form of the flexible display panel 100, the difference between the first detection signal and the second detection signal is zero, and when the flexible display panel 100 is deformed, the difference between the first detection signal and the second detection signal is not zero,
and a deformation determining module of the display device determines the deformation state of the display panel based on the difference between the first detection signal and the second detection signal, and then a control module of the display device provides a corresponding control strategy for adjusting display according to the deformation state.
In addition, the material of the first and second probe lines 120 and 130 is not limited in the present invention, and for example, as a preferred embodiment, the material of the first and second probe lines 120 and 130 may be copper and/or molybdenum.
In the present invention, the number of the deformation detection modules provided in the flexible display panel is not limited.
For example, in order to improve the detection accuracy, it is convenient for the control module of the display device to make an optimal control decision according to the detection signal.
As an optional implementation manner, the flexible display panel includes a plurality of the deformation detection modules, and the first detection lines of the plurality of the deformation detection modules are arranged at intervals in an insulated manner; and the second detection lines of the plurality of deformation detection modules are arranged at intervals in an insulating manner.
As described above, the plurality of first detection lines are arranged at an insulation interval therebetween, and the plurality of second detection lines are arranged at an insulation interval therebetween, so that the plurality of deformation detection modules can be arranged independently from each other, thereby avoiding mutual influence, and the deformation detection modules are distributed in different regions of the flexible display panel, thereby improving the accuracy of deformation detection.
Further preferably, the plurality of first detection lines are arranged in parallel at intervals, or the plurality of first detection lines are arranged along the same straight line at intervals; the plurality of second detection lines are arranged in parallel at intervals, or the plurality of second detection lines are arranged along the same straight line at intervals.
It should be noted that, in the present invention, "a plurality of the first detection lines are arranged in parallel at intervals; the plurality of second detection lines are arranged in parallel at intervals.
For example, in the embodiment shown in fig. 3a, the plurality of first detection lines 120 are arranged along the first direction and spaced along the second direction, and at the same time, the plurality of first detection lines 120 are projected with an overlap along the second direction.
In the embodiment shown in fig. 3b, the plurality of first detection lines 120 are arranged along the first direction and spaced along the second direction, and at the same time, the projections of the plurality of first detection lines 120 along the second direction do not overlap.
In addition, the invention is characterized in that' a plurality of first detection lines are arranged at intervals along the same straight line; or a plurality of the second detection lines are spaced along the same straight line, "and is not limited, for example, as an alternative embodiment, as shown in fig. 4, a plurality of the first detection lines 120 are spaced along the same straight line parallel to the first direction, and a plurality of the second detection lines 130 are spaced along the same straight line parallel to the second direction.
Of course, in order to save cost, as an alternative embodiment, as shown in fig. 1, the flexible display panel 100 includes one of the deformation detection modules, specifically, the first detection line 120 is disposed along the first direction Y, the second detection line 130 is disposed along the second direction, and the bending region 140 is disposed parallel to the second direction X.
Alternatively, as another alternative embodiment, as shown in fig. 2, the embodiment is different from the embodiment shown in fig. 1 in that the bending region 140 is parallel to the first direction Y, and when the flexible display panel is bent, the resistance value of the second probe line 130 is changed, and the resistance value of the first probe line 120 is not changed.
Comparing the two embodiments shown in fig. 1 and 2, when one of the first and second detection lines 120 and 130 has a changed resistance value, the other resistance value is not changed, and thus, the two are compared with each other, when the flexible display panel is bent, the detection line is used as the detection line with the changed resistance value, and the contrast line is used as the contrast line with the unchanged resistance value.
In the invention, the flexible display panel further comprises a transistor layer arranged on the flexible substrate, the transistor layer comprises a plurality of thin film transistors, the flexible display panel comprises a plurality of leads arranged on the same layer with the source and the drain of the thin film transistor, one of the leads is electrically connected with the first input end through a via hole penetrating through the transistor layer, and the other lead is electrically connected with the second input end through a via hole penetrating through the transistor layer.
As described above, the first input terminal and the second input terminal of the deformation detection module are electrically connected through the lead, so that a driving module (e.g., a flexible driving circuit) for providing a driving signal to the deformation detection module can be electrically connected to the first input terminal and the second input terminal of the deformation detection module through the lead, and the implementation of the connection through the lead can improve a signal-to-noise ratio (SNR) of the deformation detection module.
As a second aspect of the present invention, as shown in fig. 8, a display apparatus is provided, where the display apparatus includes a flexible display panel, where the flexible display panel is the flexible display panel provided in the present invention, and the display apparatus includes a deformation determining module, where the deformation determining module is configured to determine a deformation state of the flexible display panel according to the detection signal.
As described above, when the display device issues a deformation, the deformation determining module receives the detection signal output by the deformation detecting module, and determines the deformation state of the flexible display panel according to the detection signal. The deformation determining module can generate a deformation signal corresponding to the deformation state according to the deformation state of the flexible display panel and transmit the deformation signal to the control module of the display device, so that the control module of the display device can adjust the display effect according to the deformation state, the bad conditions of display area moire, graphic distortion and graphic distortion are reduced or even eliminated, and the user experience is improved.
In the invention, how the control module adjusts the display effect according to the deformation state is not specially limited. For example, the test may be performed first, the display defect types corresponding to different deformations are recorded, then the display parameters corresponding to the elimination of various display defects are determined by a method of continuous adjustment, and the deformation state, the display defects, and the display parameters corresponding to the elimination of the display defects are stored in the display device. When the deformation signal is received, the display defect corresponding to the deformation signal is determined, then the display parameter corresponding to the elimination display defect is determined, and the existing display signal of the display panel is adjusted.
The present invention is not limited to how the display device is deformed, and for example, as an embodiment, as shown in fig. 8, the display device 200 is in a bent state, in which the first detection line 120 is deformed and the second detection line 130 is not deformed.
In the invention, the display device further comprises a flexible driving circuit, wherein the flexible driving circuit comprises a detection driving module and a reference driving module, the detection driving module is used for providing a detection driving signal to the first input end of the deformation detection module, and the reference driving module is used for providing a reference driving signal to the second input end of the deformation detection module.
As an embodiment, as shown in fig. 6 and 8, the flexible display panel includes an external connection region 160, and the flexible driving circuit is disposed in the external connection region 160, so that the external connection region 160 is not used for displaying, and after the flexible display panel is packaged into the display device 200, the external connection region 160 may be located on the frame 220 without affecting the display of the display region 210.
In the present invention, the detection driving module and the reference driving module are not limited, for example, preferably, both the detection driving module and the reference driving module can be voltage sources, wherein the detection driving signal output by the detection driving module is a positive voltage signal, and the reference driving module outputs a 0V or negative voltage signal.
Furthermore, it should be noted that, in the flexible display panel shown in fig. 6, an output interface is reserved on a side corresponding to the external connection area 160, and lead wires electrically connected to the first input end and the second input end of the deformation detection module may be electrically connected to the detection driving module and the reference driving module of the corresponding flexible driving circuit through the output interface, and the signal-to-noise ratio (SNR) of the deformation detection module may be improved through the lead wire connection.
In the invention, the display device further comprises an amplifying circuit, and the first output end of the deformation detection module is electrically connected with the first signal receiving end of the amplifying circuit; and the second output end of the deformation detection module is electrically connected with the second signal receiving end of the amplifying circuit.
The amplifying circuit is used for amplifying the detection signal output by the deformation detection module so as to facilitate the processing of the control module.
It should be noted that, in the present invention, the arrangement of the amplifying circuit is not limited, for example, as an optional implementation, the amplifying circuit may be integrated in the flexible display panel, and specifically, may be arranged in the same layer as the transistor layer and located at the edge of the transistor layer.
As another optional implementation manner, the amplifying circuit may be an external amplifier, and in this case, the first output end and the second output end of the deformation detection module may also be electrically connected to the external amplifier through the output interface.
In the invention, the display device further comprises a control module, a brightness adjusting module and a display area adjusting module, the flexible display panel comprises a fixed part and a bent part, the bent part can be bent relative to the fixed part, when the bent part is bent, the fixed part is fixed, the deformation state comprises a bent included angle between the bent part of the flexible display panel and the fixed part, and the deformation determining module is used for determining the bent included angle according to the detection signal and judging the relation between the bent included angle and a preset angle.
When the bending included angle is smaller than the preset angle: the brightness adjusting module can increase the brightness of the bent part, and/or the display area adjusting module can control the bent part not to display, and the fixing part displays the whole picture to be displayed.
As described above, when the display device is deformed, the display effect can be adjusted by adjusting the display brightness of the display device and/or adjusting the display area, so as to reduce the display failure to the maximum extent and improve the user experience.
It should be noted that the bending portion and the fixing portion of the flexible display panel are determined according to the user viewing angle, and specifically, when the display device is bent, the side of the flexible display panel that is not changed with respect to the user viewing angle is the fixing portion, and the side of the flexible display panel that is changed with respect to the user viewing angle is the bending portion.
The invention does not limit the relation between the bending included angle and the preset angle.
For example, as an optional implementation manner, the display device includes a storage module, the storage module stores the preset angle, and further, the deformation determining module obtains the preset angle by querying the storage module, and compares the preset angle with the bending included angle to determine a relationship between the preset angle and the bending included angle.
Preferably, the preset angle is 135 °. When the bending part rotates 45 degrees, so that the included angle between the bending part and the fixing part is 135 degrees, the brightness of the bending part can be adjusted.
In addition, the invention does not limit that the brightness adjusting module can increase the brightness of the bending part.
For example, as a preferred embodiment, the display device further includes a camera and a viewpoint determining module, the camera is configured to acquire an image in a space directly opposite to the display surface of the display panel, and the viewpoint determining module is configured to determine position coordinates of human eyes according to the image acquired by the camera; the brightness adjusting module is used for adjusting the display brightness of each part of the display panel according to the position coordinates of human eyes.
Specifically, as shown in fig. 8, during the bending process of the display device 200, the brightness of the bending portion changing towards the user viewing angle is associated with the bending included angle, so that the overall brightness of the bending half-screen is increased during the bending process; because the visual angle of the bending part and the visual angle of the user continuously change, the position of the eyes of the user can be determined through the camera and the viewpoint determining module, meanwhile, the deformation determining module determines the bending included angle of the display area of the display device according to the detection signal output by the deformation detecting module, the control module performs trigonometric function calculation according to the position of the eyes of the user and the bending included angle, and adjusts the brightness of the bending part at different positions according to the calculation result, so that the screen display brightness received by the eyes of the user is consistent with that of the display device when the display device is not bent, thereby reducing the bad conditions of display moire, figure distortion and the like caused by the difference of the visual angles caused by bending, and improving the user experience.
In an adjustment mode of the display area adjustment module being capable of controlling the bending part not to display and the fixing part to display the whole to-be-displayed picture, because the visual angle of the bending part and the visual angle of the user are changed, poor display effects such as moire and the like are easily generated visually, the display picture is controlled to be displayed on the fixing part of the flexible display panel, so that the problem of poor display caused by bending of the display device is reduced, and the user experience is improved.
The above embodiments are all for adjusting the display effect according to the bending angle of the display device, the invention is not limited to this,
therefore, as another optional implementation manner, in the present invention, the display device further includes a command receiving module and a mechanical driving module, where the command receiving module is configured to parse a received instruction (e.g., a voice instruction) and output a parsing result; and the control module controls the mechanical driving module to drive the display device to deform according to the analysis result.
Specifically, a user can perform human-computer instruction interaction with the display device, specifically, the user sends a user instruction to the display device, the user instruction includes an expected bending angle of the display device, and the control module controls the mechanical driving module to bend the display device to the angle expected by the user according to the user instruction.
The command receiving module is not limited in the present invention, and for example, the command receiving module may preferably be a voice recognition module.
For example, when a user sends a voice command of "please open to 125 °, i need to watch a movie", the voice recognition module may recognize the voice and send a recognition result to the control module, the control module generates a corresponding operation command and sends the operation command to the mechanical driving module, and after receiving the operation command, the mechanical driving module drives the bending part to rotate relative to the fixing part, so that an angle between the bending part and the fixing part reaches 125 °.
Of course, the present invention is not limited to this, and the state of the display device may be controlled by a remote controller. The remote control may send out different mode signals, and the command receiving module parses the received mode signals (i.e., commands).
Based on the above adjustment manner of the display effect, the working process of the display device is described with reference to fig. 9:
the display device is powered on to work, and the deformation detection module detects the deformation state of the display device and detects the state at regular time; the amplifying circuit amplifies and transmits the detection signal detected by the state detection circuit; the control module is matched with other functional modules to execute processing and display functions, specifically, the deformation determining module is used for determining the deformation state of the flexible display panel according to the detection signal, the control module determines the eye position of a user by using a camera and a viewpoint determining module, and further, the control module controls the brightness adjusting module and/or the display area adjusting module to adjust the display effect of the display device according to the eye position and the deformation state, so that the adverse conditions of displaying moire, graphic distortion and graphic distortion are reduced or even eliminated, and the user experience is improved.
In addition, the display device also comprises a voice recognition module and a mechanical driving module, wherein the voice recognition module analyzes the instruction of the user and does not output the analysis result, and the control module controls the mechanical driving module to execute mechanical driving according to the analysis result, namely, the display device is driven to deform to the expected state of the user instruction.
The display device is not limited in the invention, and for example, the display device may be a smart phone, a Pad, or the like.
The following describes a method for manufacturing a flexible display panel provided by the present invention, where as shown in fig. 10, the method includes:
step S1, providing a flexible substrate, wherein a deformation detection module is arranged on the flexible substrate, and the deformation detection module can detect the deformation state of the flexible display panel and output a corresponding detection signal according to the deformation state;
step S2, forming a display structure on the flexible substrate.
As described above, by providing the deformation detection module in the flexible substrate, when the display panel is bent, the deformation detection module can detect the bent state of the flexible display panel and output a detection signal corresponding to the bent state, and the detection signal can reflect the bent state of the flexible display panel.
The display device comprising the display panel further comprises a deformation determining module and a control module (for example, a CPU), wherein the deformation determining module can determine the deformation state of the flexible display panel according to the detection signal, and the control module can adjust the display effect of the display panel according to the deformation state, so that the adverse conditions of displaying moire, figure distortion and figure distortion are reduced or even eliminated.
In the present invention, as shown in fig. 11, the step S1 of providing a flexible substrate includes:
step S11, forming a first sub flexible substrate;
step S12, forming the deformation detection module;
and step S13, forming a second sub flexible substrate.
As described above, in step S11, the first sub flexible substrate is formed on a hard base. Preferably, the flexible substrate has a thickness of 100nm to 10000nm and is made of a Polyimide (PI) material. Preferably, the thickness of the first sub-flexible substrate is half of the thickness of the flexible substrate, and the thickness of the second sub-flexible substrate is half of the thickness of the flexible substrate.
In step S12, first probe lines and second probe lines are formed on the first flexible substrate layer by deposition and patterning, wherein the number of the first probe lines and the second probe lines is not limited and can be adjusted according to actual needs.
Preferably, the first and second probe lines may be made of at least one of copper and molybdenum.
In addition, it should be noted that the first resistor and the second resistor in the deformation detection module are not limited, for example, as an optional implementation, the first resistor and the second resistor are in a structure of a detection line, and in such an implementation, the first resistor and the second resistor are disposed in the same layer as the first detection line and the second detection line and are formed in a single patterning process.
As a second alternative, the first resistor and the second resistor may be integrated constant-value resistor elements, and are electrically connected to the first probe line and the second probe line through lead wires, so as to form a bridge structure of the deformation detection module.
In step S13, the second sub-flexible substrate is formed over the first sub-flexible substrate and the first and second probe lines to form a sandwich structure as shown in fig. 7, wherein the second sub-flexible substrate can ensure that the first and second probe lines are insulated from the display structure.
In the present invention, the method for manufacturing the flexible display panel further includes a step of forming a display structure, as shown in fig. 6, where the display structure 150 covers the second sub-flexible substrate 112.
Specifically, the step of forming the display structure includes:
and forming a barrier layer, wherein the thickness of the barrier layer is 100 nm-900 nm.
Forming a buffer layer;
forming a transistor layer;
and forming a light-emitting functional layer.
As described above, the normal display structure of the flexible display panel is manufactured through the above steps.
Further, the step of forming the transistor layer includes:
forming an active layer;
forming a grid electrode;
forming a source drain electrode;
as described above, in the step of forming the active layer, preferably, the material for fabricating the active layer may be a-Si.
The step of forming the gate electrode includes:
and depositing a grid electrode material layer, and patterning the grid electrode material layer to form the grid electrode, wherein the grid electrode is preferably a double-grid structure. In addition, a gate insulating layer is formed between the steps of forming the active layer and forming the gate electrode. The method comprises forming an interlayer insulating layer between the steps of forming the gate electrode and forming the source and drain electrodes.
The step of forming the source and drain electrodes comprises the following steps:
and depositing a source-drain metal material layer on the interlayer insulating layer, and patterning the source-drain metal material layer to form a source electrode and a drain electrode.
If it is desired to provide the amplifying circuit in the flexible display panel, it is preferable that the amplifying circuit is provided at an edge of the transistor layer while the transistor layer is formed. Otherwise, an output interface is arranged on one side, facing the external connection area, of the transistor layer, so that the output end of the deformation detection module is electrically connected with the input end of the external amplification circuit.
In addition, the output interface is also used for connecting a flexible driving circuit (such as an FPC or an IC) to drive the flexible display panel to work.
The external flexible driving circuit and the external amplifying circuit can simplify the manufacturing process of the flexible display panel.
The step of forming a light emitting function layer includes:
forming an anode layer;
forming a hole transport layer;
forming a light emitting functional layer;
forming an electron transport layer;
a cathode is formed.
After the display structure 150 is formed, a peeling step is further included, specifically, the flexible display panel is peeled from the hard substrate.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (7)
1. A display device comprises a flexible display panel, wherein the flexible display panel comprises a flexible substrate, the flexible display panel comprises at least one deformation detection module arranged on the flexible substrate, the deformation detection module can detect the deformation state of the flexible display panel and output a corresponding detection signal according to the deformation state, the display device comprises a deformation determination module, the deformation determination module is used for determining the deformation state of the flexible display panel according to the detection signal,
the display device also comprises a camera and a viewpoint determining module, wherein the camera is used for acquiring images in a space right opposite to the display surface of the display panel, and the viewpoint determining module is used for determining the position coordinates of human eyes according to the images acquired by the camera;
the display device also comprises a control module, a brightness adjusting module and a display area adjusting module, wherein the brightness adjusting module is used for adjusting the display brightness of each part of the display panel according to the position coordinate of human eyes, the flexible display panel comprises a fixed part and a bent part, the bent part can be bent relative to the fixed part, the fixed part is fixed when the bent part is bent, the deformation state comprises a bending included angle between the bent part of the flexible display panel and the fixed part, the deformation determining module is used for determining the bending included angle according to the detection signal and judging the relation between the bending included angle and a preset angle, the control module performs trigonometric function calculation according to the positions of the eyes of a user and the bending included angle and adjusts the brightness of the bent part at different positions according to the calculation result, the screen display brightness received by the eyes of the user is consistent with that when the display device is not bent;
when the bending included angle is smaller than the preset angle: the brightness adjusting module can increase the brightness of the bent part, and/or the display area adjusting module can control the bent part not to display, and the fixing part displays the whole picture to be displayed.
2. The display device according to claim 1, wherein the flexible substrate comprises a first sub-flexible substrate and a second sub-flexible substrate which are stacked, and the deformation detection module is provided between the first sub-flexible substrate and the second sub-flexible substrate.
3. The display device according to claim 1, wherein the flexible substrate includes a first edge extending in a first direction, a second edge extending in a second direction, and a predetermined deformation region, the first direction intersects the second direction, the deformation region extends in a direction coincident with the second direction,
the deformation detection module comprises a first input end, a second input end, a first output end, a second output end, a first detection line, a second detection line, a first resistor and a second resistor,
wherein the first probe line extends along a first direction, the second probe line extends along a second direction, the first input terminal is configured to receive a detection driving signal, the second input terminal is configured to receive a reference driving signal, the detection signal includes a first detection signal and a second detection signal, the first output terminal is configured to output the first detection signal, and the second output terminal is configured to output the second detection signal,
one end of the first probe line is formed as the first input end, one end of the second probe line is electrically connected to the first input end, the other end of the second probe line is formed as the first output end, one end of the first resistor is electrically connected to the first output end, the other end of the first resistor is formed as the second input end, one end of the second resistor is electrically connected to the second input end, the other end of the second resistor is formed as the second output end, and the other end of the first probe line is electrically connected to the second output end.
4. The display device according to claim 3, wherein the flexible display panel includes a plurality of the deformation detection modules,
the first detection lines of the deformation detection modules are arranged at intervals in an insulating manner;
and the second detection lines of the plurality of deformation detection modules are arranged at intervals in an insulating manner.
5. The display device according to claim 4,
the plurality of first detection lines are arranged in parallel at intervals, or the plurality of first detection lines are arranged along the same straight line at intervals;
many the second detection line parallel interval sets up, perhaps, many the second detection line sets up along same straight line interval.
6. The display device according to claim 3,
the display device further comprises a flexible driving circuit, the flexible driving circuit comprises a detection driving module and a reference driving module,
the detection driving module is used for providing a detection driving signal for a first input end of the deformation detection module, and the reference driving module is used for providing a reference driving signal for a second input end of the deformation detection module.
7. The display device according to any one of claims 1 to 6, further comprising a command receiving module and a mechanical driving module,
the command receiving module is used for analyzing the received command and outputting an analysis result; and the control module controls the mechanical driving module to drive the display device to deform according to the analysis result.
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| CN110224009B (en) * | 2019-06-06 | 2021-04-23 | 京东方科技集团股份有限公司 | Substrate base plate, display panel, manufacturing method of display panel and display device |
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| CN111681550A (en) * | 2019-07-26 | 2020-09-18 | 友达光电股份有限公司 | Display method |
| CN110570771B (en) * | 2019-09-12 | 2022-01-25 | 云谷（固安）科技有限公司 | Flexible display device and display control method of flexible display device |
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