CN111508358A - Display device - Google Patents
Display device Download PDFInfo
- Publication number
- CN111508358A CN111508358A CN202010340802.2A CN202010340802A CN111508358A CN 111508358 A CN111508358 A CN 111508358A CN 202010340802 A CN202010340802 A CN 202010340802A CN 111508358 A CN111508358 A CN 111508358A
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- CN
- China
- Prior art keywords
- display panel
- force
- resistor
- display device
- display
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
Abstract
The embodiment of the application provides a display device, which comprises a display panel, a flexible circuit board and a state judgment unit, wherein the display panel comprises a bending area, a force-sensitive sensor is arranged on the bending area, and the force-sensitive sensor is provided with a resistor which changes in response to pressure; the flexible circuit board is electrically connected with the display panel, a signal generating unit is arranged on the flexible circuit board, and the signal generating unit is used for generating corresponding electric signals according to the resistors; the state judging unit is electrically connected with the signal generating unit and used for detecting the magnitude of the electric signal and judging the current state of the display panel according to the magnitude of the electric signal so as to enable the display panel to perform corresponding display according to the current state. The scheme can improve the judgment accuracy of the display device on the folding state of the display device.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device.
Background
With the continuous development of display technology, portable display devices such as mobile phones and tablet computers are visible everywhere in life. The large-area display panel can improve the visual experience of a user, but the display device is inconvenient to carry due to the expansion of the display panel, so that the foldable display device is produced.
In the application scenario of the foldable display device, the display device needs to adjust its display condition according to its folded state. At present, the folding state of the display device is usually judged by the electromagnetic conversion principle of the hall sensor. However, this method is easily interfered by external factors, resulting in erroneous judgment.
Disclosure of Invention
The embodiment of the application provides a display device, can improve display device to its fold condition's judgement accuracy.
An embodiment of the present application provides a display device, including:
a display panel including a bending region on which a force sensitive sensor having a resistance that changes in response to pressure is disposed;
the flexible circuit board is electrically connected with the display panel, and is provided with a signal generation unit which is used for generating a corresponding electric signal according to the resistor;
and the state judgment unit is electrically connected with the signal generation unit and is used for detecting the magnitude of the electric signal and judging the current state of the display panel according to the magnitude of the electric signal so as to enable the display panel to perform corresponding display according to the current state.
In the display device provided by the embodiment of the application, the force-sensitive sensor comprises a first force-sensitive resistor and a second force-sensitive resistor, the first force-sensitive resistor is arranged on one side of the bending area, and the second force-sensitive resistor is arranged on the other side of the bending area.
In the display device provided by the embodiment of the application, the bending region includes a folding axis, a geometric center of the first force-sensitive resistor coincides with the folding axis, and a geometric center of the second force-sensitive resistor coincides with the folding axis.
In the display device provided by the embodiment of the application, the signal generating unit comprises a first matching resistor and a second matching resistor, the first force sensitive resistor and the first matching resistor are connected in series, and the second force sensitive resistor and the second matching resistor are connected in series.
In the display device provided by the embodiment of the application, the first force sensitive resistor and the first matching resistor are connected in parallel with the second force sensitive resistor and the second matching resistor.
In the display device provided in the embodiment of the application, the magnitude of the electrical signal is equal to a voltage difference between a voltage across the first matching resistor and a voltage across the second matching resistor.
In the display device provided in the embodiment of the application, the state determination unit is configured to determine the current state of the display panel according to a voltage difference between a voltage across the first matching resistor and a voltage across the second matching resistor.
In the display device provided in the embodiment of the application, the state determination unit is configured to determine that the display panel is in a folded state when the voltage difference is greater than or equal to a threshold value; or for determining that the display panel is in the unfolded state when the voltage difference is less than the threshold value.
In the display device provided by the embodiment of the application, when it is determined that the display panel is in the folded state, the state judgment unit is used for controlling the turning-off of one folded surface of the display panel and concentrating the display content of the display panel to another folded surface of the display panel for displaying.
In the display device provided by the embodiment of the application, the first force-sensitive resistor and the second force-sensitive resistor are formed by winding wires on a substrate of the display panel by using a force-sensitive material.
In summary, the display device provided in the embodiment of the present application includes a display panel, a flexible circuit board, and a state determination unit, where the display panel includes a bending region, and a force sensor is disposed on the bending region, and the force sensor has a resistance that changes in response to a pressure; the flexible circuit board is electrically connected with the display panel, a signal generating unit is arranged on the flexible circuit board, and the signal generating unit is used for generating corresponding electric signals according to the resistors; the state judging unit is electrically connected with the signal generating unit and used for detecting the magnitude of the electric signal and judging the current state of the display panel according to the magnitude of the electric signal so as to enable the display panel to perform corresponding display according to the current state. The scheme can improve the judgment accuracy of the display device on the folding state of the display device.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application.
Fig. 2 is an equivalent circuit schematic diagram of a display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Embodiments of the present application provide a display device, which will be described in detail below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. The display device 100 may include a display panel 10, a flexible circuit board 20, and a state determination unit 30.
The display panel 10 may include a display region 11 and a non-display region 12. Wherein the display panel 10 may include a bending region 13. The bending zone 13 has a folding axis 131. The display panel 10 may be folded about the folding axis 131. Wherein the bending area 13 is provided with a force sensor 14. The force sensitive sensor 14 has a resistance that changes in response to pressure. That is, when the display panel 10 is folded, the resistance of the force sensor 14 changes accordingly.
In some embodiments, the force sensitive sensor 14 may include a first force sensitive resistor 141 and a second force sensitive resistor 142. The first force-sensitive resistor 141 is disposed at one side of the bending region 13, and the second force-sensitive resistor 142 is disposed at the other side of the bending region 13. It should be noted that the geometric center of the first force-sensitive resistor 141 and the geometric center of the second force-sensitive resistor 142 are both coincident with the folding axis 131.
It should be noted that the first force-sensitive resistor 141 and the second force-sensitive resistor 142 are both located in the non-display area 12 of the display panel 10. In some embodiments, the first force-sensitive resistor 141 and the second force-sensitive resistor 142 may be formed by winding a force-sensitive material on a substrate of the display panel 10.
Wherein the flexible circuit board 20 may be electrically connected with the display panel 10. The flexible circuit board 20 is provided with a signal generating unit 21. The signal generating unit 21 may be used to generate a corresponding electrical signal according to the resistance of the force sensitive sensor 14. In some embodiments, the signal generating unit 21 may include a first matching resistor 211 and a second matching resistor 212. The signal generating unit 21 may further include a system power supply and the like.
The state determination unit 30 may be electrically connected to the signal generation unit 21. The state determining unit 30 may be configured to detect a magnitude of the electrical signal, and determine a current state of the display panel 10 according to the magnitude of the electrical signal, so that the display panel 10 can perform corresponding display according to the current state. In some embodiments, the magnitude of the electrical signal may be equal to the voltage difference between the voltage across the first matching resistor 211 and the voltage across the second matching resistor 212.
That is, the state determination unit 30 may be configured to determine the current state of the display panel 10 according to a voltage difference between the voltage across the first matching resistor 211 and the voltage across the second matching resistor 212. Specifically, the state determination unit 30 may be configured to determine that the display panel 10 is in a folded state when the voltage difference is greater than or equal to the threshold; or for determining that the display panel 10 is in the unfolded state when the voltage difference is less than the threshold value.
It is understood that the threshold is the maximum voltage difference between the voltage across the first matching resistor 211 and the voltage across the second matching resistor 212. That is, when the voltage difference between the voltages at the two ends of the first matching resistor 211 and the second matching resistor 212 is the maximum voltage difference, the state determination unit 30 may determine that the display panel 10 is in the folded state. When the voltage difference is less than the maximum voltage difference, it may be determined that the display panel 10 is in the unfolded state.
As shown in fig. 2, the equivalent circuit diagram of the display device 100 according to the embodiment of the present disclosure may include a first force-sensitive resistor 141 connected in series with a first matching resistor 211, and a second force-sensitive resistor 142 connected in series with a second matching resistor 212. Also, the first force sensitive resistor 141 and the first matching resistor 211 are connected in parallel with the second force sensitive resistor 142 and the second matching resistor 212. Wherein point a may be connected to a system power supply of the display device 100, and point C may be connected to a cathode of the display panel 10, thereby forming a circuit input voltage Vin (V)A-VC). The voltage at point D is equal to the voltage across the first matching resistor 211. The voltage at point B is equal to the voltage across the second matching resistor 212. The first matching resistor 211 has a resistance value of R1, the first thermistor 141 has a resistance value of R2, the second matching resistor 212 has a resistance value of R3, and the second thermistor 142 has a resistance value of R4.
For the equivalent circuit diagram of the display device 100, when the input voltage Vin is constant, the voltage V at the point B is constantABCan be that
Voltage V at point DADCan be that
It can be understood that, when the display panel 10 is in the unfolded state, the first and second force sensitive resistors 141 and 142 are initial resistance values, and thus, the voltage V at the point DADVoltage V at point BABThe voltage difference V1 may be:
when the display panel 10 is in the folded state, the first and second force- sensitive resistors 141 and 142 are pressed by the folding, so as to change their resistances, for example, the resistance is △ R, and the voltage V at point D isADVoltage V at point BABThe voltage difference V2 may be:
therefore, the voltage difference △ V before and after the display panel 10 is folded may be:
since the resistance change △ R before and after folding is small, i.e., △ R1/R2/R3/R4, the above expression of △ V can be simplified as:
from the above, the circuit can convert the change of the resistance values of the first and second force- sensitive resistors 141 and 142 into the change of the voltage difference between the points B and D, thereby determining the current state of the display panel 10. That is, the state determination unit 30 only needs to detect the voltage difference between the voltages at the two ends of the first matching resistor 211 and the second matching resistor 212 to determine the current state of the display panel 10.
The state determination unit 30 may be disposed on the display panel 10 or on the flexible circuit board 20.
In some embodiments, the state determination unit 30 may be a control chip (IC). When determining the current state of the display panel 10, the state determination unit 30 may control the display panel 10 to perform corresponding display. For example, when the display panel 10 is in the folded state, one of the folding surfaces of the display panel 10 may be controlled to be turned off, and the display content of the display panel 10 may be concentrated on the other folding surface of the display panel 10 for display. It is understood that the display panel 10 normally displays when the display panel 10 is in the unfolded state. That is, the two folded surfaces of the display panel 10 cooperate to display.
When the display panel 10 is a multi-fold display panel, the state determining unit 30 may determine the current state of the display panel 10 according to the voltage difference between the two ends of the first matching resistor 211 and the voltage between the two ends of the second matching resistor 212. for example, when the display panel 10 includes two folding regions, the voltage difference between the two ends of the first matching resistor 211 and the voltage between the two ends of the second matching resistor 212 is △ V1 when the first folding region is folded, and when the second folding region is folded, the voltage difference between the two ends of the first matching resistor 211 and the voltage between the two ends of the second matching resistor 212 is △ V2. therefore, when the first folding region and the second folding region are both folded, the voltage difference between the two ends of the first matching resistor 211 and the voltage between the two ends of the second matching resistor 212 is △ V1+ △ V2.
Therefore, according to the present invention, the force sensor 14 is disposed on the bending region 13 of the display panel 10, so that the change of the bending state of the bending region can be converted into the change of the resistance of the force sensor, the signal generating unit 21 can generate a corresponding electrical signal according to the change of the resistance, and the state determining unit 30 completes the detection of the current state of the display panel 10 through the electrical signal. According to the scheme, the external optical signal or magnetic signal is not needed, the deformation of the display panel 10 is completely detected when the display panel is bent, the interference of external factors on the detection result can be completely eliminated, the detection accuracy is greatly improved, and the misjudgment is avoided. That is, this scheme can improve the accuracy of the display device 100 in determining its folded state.
The display device provided by the embodiment of the present application is described in detail above, and the principle and the implementation of the present application are explained in the present application by applying specific examples, and the description of the above embodiment is only used to help understanding the technical solution and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A display device, comprising:
a display panel including a bending region on which a force sensitive sensor having a resistance that changes in response to pressure is disposed;
the flexible circuit board is electrically connected with the display panel, and is provided with a signal generation unit which is used for generating a corresponding electric signal according to the resistor;
and the state judgment unit is electrically connected with the signal generation unit and is used for detecting the magnitude of the electric signal and judging the current state of the display panel according to the magnitude of the electric signal so as to enable the display panel to perform corresponding display according to the current state.
2. The display device of claim 1, wherein the force-sensitive sensor comprises a first force-sensitive resistor and a second force-sensitive resistor, the first force-sensitive resistor disposed on one side of the inflection region, the second force-sensitive resistor disposed on another side of the inflection region.
3. The display device of claim 2, wherein the inflection region includes a fold axis, a geometric center of the first force-sensitive resistor coinciding with the fold axis, and a geometric center of the second force-sensitive resistor coinciding with the fold axis.
4. The display device according to claim 2, wherein the signal generation unit includes a first matching resistor and a second matching resistor, the first force sensitive resistor and the first matching resistor are connected in series, and the second force sensitive resistor and the second matching resistor are connected in series.
5. The display device of claim 4, wherein the first force sensitive resistor and the first matched resistor are in parallel with the second force sensitive resistor and the second matched resistor.
6. The display device according to claim 5, wherein the magnitude of the electrical signal is equal to a voltage difference between a voltage across the first matching resistor and a voltage across the second matching resistor.
7. The display device according to claim 6, wherein the state determination unit is configured to determine the current state of the display panel according to a voltage difference between a voltage across the first matching resistor and a voltage across the second matching resistor.
8. The display device according to claim 7, wherein the state determination unit is configured to determine that the display panel is in a folded state when the voltage difference is greater than or equal to a threshold value; or for determining that the display panel is in the unfolded state when the voltage difference is less than the threshold value.
9. The display device according to claim 8, wherein when it is determined that the display panel is in a folded state, the state determination unit is configured to control one folding surface of the display panel to be turned off, and concentrate display contents of the display panel on another folding surface of the display panel for display.
10. The display device of claim 2, wherein the first force-sensitive resistor and the second force-sensitive resistor are formed by winding a wire on a substrate of the display panel using a force-sensitive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010340802.2A CN111508358A (en) | 2020-04-26 | 2020-04-26 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010340802.2A CN111508358A (en) | 2020-04-26 | 2020-04-26 | Display device |
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| CN111508358A true CN111508358A (en) | 2020-08-07 |
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| CN202010340802.2A Pending CN111508358A (en) | 2020-04-26 | 2020-04-26 | Display device |
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| CN114141135A (en) * | 2020-09-04 | 2022-03-04 | 乐金显示有限公司 | Display device |
| CN114550586A (en) * | 2022-02-11 | 2022-05-27 | 京东方科技集团股份有限公司 | Flexible display panel, manufacturing method and monitoring method thereof, and folding display device |
| CN114706239A (en) * | 2022-03-30 | 2022-07-05 | 绵阳惠科光电科技有限公司 | Display device and binding state detection method |
| KR102655416B1 (en) * | 2022-12-28 | 2024-04-05 | 주식회사 현대케피코 | Foldable electronic control unit |
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