CN110764643A - Display panel with touch feedback - Google Patents
Display panel with touch feedback Download PDFInfo
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- CN110764643A CN110764643A CN201910959133.4A CN201910959133A CN110764643A CN 110764643 A CN110764643 A CN 110764643A CN 201910959133 A CN201910959133 A CN 201910959133A CN 110764643 A CN110764643 A CN 110764643A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
Abstract
The invention provides a display panel with touch feedback, which is characterized in that a light sensing circuit is integrated on a pixel array layer to obtain the smoothness of a display object corresponding to a touched pixel unit, and a feedback circuit which is stacked and in communication connection with the light sensing circuit is arranged, wherein the feedback circuit generates a corresponding feedback signal according to the smoothness of the display object corresponding to the touched pixel unit obtained by the light sensing circuit, so that different feedback signals are generated aiming at different display objects, different touch senses are given to a user, and the user experience is improved.
Description
Technical Field
The invention relates to the field of display panels, in particular to a display panel with touch feedback.
Background
At present, electronic products with touch control functions are widely applied to various industries and fields, however, in order to better protect internal components, the surfaces of the electronic products with touch control functions are mostly made of hard glass cover plates, although some electronic products with flexible cover plates are also provided, when the electronic products are touched, no matter what display objects are touched by fingers, the touch feeling of the electronic products is the same, and no real touch feeling exists, for example, a piece of sponge or an iron block is displayed, and the touch feeling of the fingers is not different.
Disclosure of Invention
In view of the above, embodiments of the present invention are directed to provide a display panel with touch feedback, in which a light sensing circuit is integrated on a pixel array layer to obtain smoothness of a display object corresponding to a touched pixel unit, and a feedback circuit is disposed and stacked on and communicatively connected to the light sensing circuit, and the feedback circuit generates a corresponding feedback signal according to the smoothness of the display object corresponding to the touched pixel unit obtained by the light sensing circuit, so as to generate different feedback signals for different display objects, thereby giving different touch sensations to a user and improving user experience.
An embodiment of the present invention provides a display panel with touch feedback, including: a light sensing circuit integrated on the pixel array layer; the feedback circuit is stacked with the light sensing circuit and is in communication connection with the light sensing circuit; the light sensing circuit acquires the smoothness of a display object corresponding to a touched pixel unit; the feedback circuit generates a corresponding feedback signal according to the smoothness.
In an embodiment, the light sensing circuit obtains the smoothness of the display object corresponding to the touched pixel unit according to a tangent slope of a brightness curve of the touched pixel unit.
In one embodiment, the light sensing circuit includes a plurality of light sensing units, each of the light sensing units corresponds to one of the pixel units in the pixel array layer, and is used for obtaining the brightness of the pixel unit.
In one embodiment, the light sensing unit includes a photodiode and a storage capacitor, an anode of the photodiode is connected to a power supply, and a cathode of the photodiode is connected to the storage capacitor, wherein the pixel unit irradiates the photodiode to charge the storage capacitor.
In one embodiment, the light sensing circuit includes a detection unit electrically connected to the storage capacitors, and the detection unit detects the amount of electricity stored in each storage capacitor.
In an embodiment, the light sensing unit further includes a switch tube disposed between the detection unit and the storage capacitor, and the switch tube is periodically opened and closed.
In one embodiment, the switching tube includes a thin film transistor.
In one embodiment, the feedback circuit includes a plurality of feedback units, each of the feedback units corresponding to one pixel unit in the pixel array layer.
In an embodiment, the feedback unit comprises a vibration unit, and the vibration unit generates vibration with corresponding frequency and/or amplitude according to the smoothness.
In an embodiment, the display panel further includes a control circuit, and the control circuit is electrically connected to the light sensing circuit and the feedback circuit, respectively.
According to the display panel with touch feedback provided by the embodiment of the invention, the smoothness of the display object corresponding to the touched pixel unit is obtained by integrating the light sensing circuit on the pixel array layer, and the feedback circuit which is stacked and in communication connection with the light sensing circuit is arranged, and generates the corresponding feedback signal according to the smoothness of the display object corresponding to the touched pixel unit obtained by the light sensing circuit, so that different feedback signals are generated aiming at different display objects, different touch senses are given to a user, and the user experience is improved.
Drawings
Fig. 1 is a schematic structural diagram of a display panel with touch feedback according to an embodiment of the present disclosure.
Fig. 2 is a schematic cross-sectional structure view of a display panel with touch feedback along a plane of a pixel array layer according to an embodiment of the present disclosure.
Fig. 3 is a schematic circuit diagram of a light sensing unit according to an embodiment of the present disclosure.
Fig. 4 is a schematic block diagram illustrating a display panel with touch feedback according to another embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of a display panel with touch feedback according to another embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Further, in the exemplary embodiments, since the same reference numerals denote the same components having the same structure or the same steps of the same method, if an embodiment is exemplarily described, only a structure or a method different from the already described embodiment is described in other exemplary embodiments.
Throughout the specification and claims, when one element is described as being "connected" to another element, the one element may be "directly connected" to the other element or "electrically connected" to the other element through a third element. Furthermore, unless explicitly described to the contrary, the term "comprising" and its corresponding terms should only be taken as including the stated features, but should not be taken as excluding any other features.
Touch control operation is a commonly used technique in current electronic devices, and has been widely applied to various electronic devices or products, such as smart phones, computers, and various display screens. However, the surface of these electronic devices is usually rigid, such as a glass cover plate, etc., and the surface shape thereof does not change with the touch of a finger, and does not generate feedback; although some electronic devices have used a flexible cover plate, i.e. the surface shape of the cover plate can be changed along with the touch of the finger, the shape is only changed, and there is no other feedback information, i.e. the touch feeling of the finger touching any position or any display object is the same or similar, and the user cannot distinguish the display object touched by the user according to the touch feeling, obviously, the experience effect needs to be further improved.
In order to implement touch feedback to distinguish between touched display objects, it may be considered to provide different feedback according to different display objects touched by a finger, however, how to distinguish between touch parameters of the display objects touched by the finger (i.e. information such as smoothness or roughness of the display objects touched by the finger), how to give corresponding feedback effects according to the touch parameters, and the like, are all problems to be solved.
In order to solve the above-mentioned problem of distinguishing the touch parameter of the display object touched by the finger and how to give the corresponding feedback effect according to the touch parameter, the embodiments of the present application provide a display panel with touch feedback, by providing a light sensing circuit and a feedback circuit, and using the light sensing circuit to obtain the light emitting brightness of each pixel unit (i.e. the display effect of the display object corresponding to the pixel unit at the pixel unit), since the region touched by the finger is a continuous pixel unit region, usually the continuous pixel unit region corresponds to a display object (which may be a stone, sponge, or other object with different smoothness or roughness), therefore, the smoothness or roughness of the continuous pixel unit region can be known according to the change rate between the brightness of the pixel units in the continuous pixel unit region (i.e. the brightness difference between adjacent pixel units), then obtaining the smoothness or roughness of the corresponding display object; the feedback circuit generates corresponding feedback signals to the touch finger according to the obtained smoothness or roughness, so that the display objects with different smoothness correspond to different feedback signals, namely different touch senses of different display objects are realized.
The following describes a specific structure and an implementation of the display panel with touch feedback provided in the embodiments of the present application in detail with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a display panel with touch feedback according to an embodiment of the present disclosure. As shown in fig. 1, the display panel includes a light sensing circuit 2 and a feedback circuit 3, wherein the light sensing circuit 2 is integrated in a pixel array layer 1, and the feedback circuit 3 and the light sensing circuit 2 are stacked and communicatively connected; the light sensing circuit 2 obtains smoothness of a display object corresponding to the touched pixel unit 11, and the feedback circuit 3 generates a corresponding feedback signal according to the smoothness. The light sensing circuit 2 is integrated in the pixel array layer 1, the smoothness of a display object corresponding to the pixel unit 11 is obtained through the light sensing circuit 2 according to the display effect of the pixel unit 11 in the touched area, and the feedback circuit 3 generates a corresponding feedback signal according to the smoothness of the display object, so that different tactile feedback is realized for different display objects. It should be understood that the feedback circuit 3 may be integrated in the pixel array layer 1, or a feedback film layer may be separately disposed, and the feedback film layer is disposed on one side of the pixel array layer 1 (as shown in fig. 1), as long as the feedback circuit 3 is electrically connected to the light sensing circuit 2, and a corresponding feedback signal may be provided at a corresponding position according to the smoothness of a display object corresponding to the touched pixel unit 11, and the embodiment of the present application is not limited to a specific position of the feedback circuit 3.
According to the display panel with touch feedback provided by the embodiment of the invention, the smoothness of the display object corresponding to the touched pixel unit is obtained by integrating the light sensing circuit on the pixel array layer, and the feedback circuit which is stacked and in communication connection with the light sensing circuit is arranged, and generates the corresponding feedback signal according to the smoothness of the display object corresponding to the touched pixel unit obtained by the light sensing circuit, so that different feedback signals are generated aiming at different display objects, different touch senses are given to a user, and the user experience is improved.
In an embodiment, the light sensing circuit 2 may obtain the smoothness of the display object corresponding to the touched pixel unit 11 according to a tangent slope of the luminance curve of the touched pixel unit 11. The pixel units 11 display various shapes of display objects through pixel colors and pixel luminances thereof, and the pixel luminances among the pixel units 11 of the same color can be expressed as the smoothness of corresponding positions of the display objects, for example, the pixel luminances among the pixel units 11 corresponding to iron blocks with smooth surfaces are similar or change smoothly, and the pixel luminances among the pixel units 11 corresponding to sponges with rough surfaces have large differences or change violently, so that the relative smoothness of the display objects can be known according to the change rate of the pixel luminances among the pixel units 11 corresponding to the display objects (i.e., the smoothness of the iron blocks is known to be larger than that of the sponges). In the embodiment of the present application, the light sensing circuit 2 obtains the brightness of the touched pixel unit 11, and draws the obtained brightness of each pixel unit 11 into a brightness curve, and obtains the smoothness of the display object corresponding to the touched pixel unit 11 according to the tangent slope of the brightness curve (i.e. the brightness change rate between adjacent pixel units 11).
Fig. 2 is a schematic cross-sectional structure view of a display panel with touch feedback along a plane of a pixel array layer according to an embodiment of the present disclosure. As shown in fig. 2, the light sensing circuit 2 may include a plurality of light sensing units 21, and each light sensing unit 21 corresponds to one pixel unit 11 in the pixel array layer 1 for obtaining the brightness of the pixel unit 11. By arranging the plurality of light sensing units 21, each light sensing unit 21 corresponds to one pixel unit 11, that is, each pixel unit 11 corresponds to one light sensing unit 21, wherein the light sensing units 21 can be arranged below or above the pixel units 11 along the film layer stacking direction, the plurality of light sensing units 21 are utilized to respectively obtain the brightness of each pixel unit 11, so as to obtain an accurate brightness curve of the touched pixel unit 11, and then obtain the accurate smoothness of the display object corresponding to the touched pixel unit 11. It should be understood that the number and the arrangement positions of the light sensing units 21 may be selected according to different application scenarios, as long as the number and the arrangement positions of the light sensing units 21 are selected to accurately obtain the brightness of each pixel unit 11, and the embodiment of the present application is not limited to the specific number and the specific arrangement positions of the light sensing units 21.
Fig. 3 is a schematic circuit diagram of a light sensing unit according to an embodiment of the present disclosure. As shown in fig. 3, the photo sensing unit 21 includes a photodiode 211 and a storage capacitor 212, wherein the anode of the photodiode 211 is connected to a power source 213, and the cathode of the photodiode 211 is connected to the storage capacitor 212, and the pixel unit 11 illuminates the photodiode 211 to charge the storage capacitor 212.
The photodiode works under the action of reverse voltage, and when no light is emitted, reverse current is extremely weak, namely dark current; in the presence of light, the reverse current rapidly increases to tens of microamperes, referred to as photocurrent. The larger the intensity of light, the larger the reverse current, and the change of light causes the change of current of the photodiode, which can convert the optical signal into an electrical signal, and becomes an optoelectronic sensing device.
By providing the photodiode 211, when the pixel unit 11 emits light to irradiate the photodiode 211, the reverse current of the photodiode 211 is increased, so that the power source 213 charges the storage capacitor 212, and the larger the light emitting brightness of the pixel unit 11 is, the larger the reverse current is, the larger the charging current supplied by the power source 213 to the storage capacitor 212 is, so that the storage capacitor 212 can store more power, while when the pixel unit 11 does not emit light, the reverse current of the photodiode 211 is very weak, and the power source 213 cannot substantially charge the storage capacitor 212. Therefore, the brightness of the corresponding pixel unit 11 can be known according to the amount of electricity stored in the storage capacitor 212 of each light sensing unit 21.
In an embodiment, the optical sensing circuit 2 may further include a detection unit 22 electrically connected to the storage capacitors 212, and the detection unit 22 detects the amount of power stored in each storage capacitor 212. The detection unit 22 is configured to detect the electric quantity stored in each storage capacitor 212, so as to know the brightness of the corresponding pixel unit 11, and then know the smoothness of the display object corresponding to the touched pixel unit 11. The detecting unit 22 may scan the storage capacitors 212 one by one in a scanning manner to obtain the electric quantity stored in each storage capacitor 212, and the detecting unit 22 may also include a plurality of detecting units 22, where the plurality of detecting units 22 respectively detect the electric quantity stored in each storage capacitor 212, so as to further improve the detecting efficiency, avoid mutual interference between the storage capacitors 212, and improve the detecting accuracy.
In an embodiment, as shown in fig. 3, the light sensing unit 2 may further include a switch 23 disposed between the detection unit and the storage capacitor 212, and the switch 23 is periodically opened and closed. In a further embodiment, the switching tube 23 comprises a thin film transistor. By arranging the switch tube 23, and opening and closing the switch tube 23 periodically, the power supply 213 charges the storage capacitor 212 when the switch tube 23 is opened, and when the switch tube 23 is closed, the power supply 213 stops charging the storage capacitor 212 and the storage capacitor 212 is discharged to the detection unit 22 through the switch tube 23, so that the detection unit 22 detects the amount of electricity stored in the storage capacitor 212. It should be understood that the embodiment of the present application may select the type of the switch tube 23 according to different application scenarios, as long as the selected type of the switch tube 23 enables the detection unit 22 to detect the amount of electricity stored in the storage capacitor 212, and the embodiment of the present application is not limited to the specific type of the switch tube 23.
In an embodiment, as shown in fig. 1, the feedback circuit 3 may include a plurality of feedback units 31, each feedback unit 31 corresponding to one pixel unit 11 in the pixel array layer 1. By arranging the plurality of feedback units 31, each feedback unit 31 corresponds to one pixel unit 11 in the pixel array layer 1, and each feedback unit 31 can also correspond to one light sensing unit 21, so that only the feedback unit 31 in the touched area generates a corresponding feedback signal each time, accurate feedback is realized, and user experience is improved. It should be understood that, in the embodiment of the present application, the number and the setting positions of the feedback units 31 may be selected according to different application scenarios, because in general, the same display object is displayed in the touched region, and smoothness of the same display object is the same or similar, therefore, one feedback unit 31 may be set to correspond to a plurality of adjacent pixel units 11, as long as the number and the setting positions of the selected feedback units 31 can meet feedback experience of a user, and the specific number and the specific setting positions of the feedback units 31 are not limited in the embodiment of the present application.
In an embodiment, the feedback unit 31 may be a vibration unit, and the vibration unit generates vibration of corresponding frequency and/or amplitude according to the smoothness. The vibration unit generates vibrations with different frequencies or different vibration amplitudes to distinguish the display object touched by the user, and it should be understood that the feedback form may be selected according to different application scenarios, for example, the feedback form may be electrostatic feedback, as long as the selected feedback form can distinguish the display object touched by the user, and the specific feedback form is not limited in the embodiment of the present application. It should be further understood that, in the embodiment of the present application, other vibration parameters may be selectively changed to distinguish the touch-controlled display object, which is not limited in the embodiment of the present application.
Fig. 4 is a schematic block diagram illustrating a display panel with touch feedback according to another embodiment of the present disclosure. As shown in fig. 4, the display panel may further include a control circuit 4, where the control circuit 4 is electrically connected to each of the light sensing units 21 in the light sensing circuit 2 and each of the feedback units 31 in the feedback circuit 3, respectively, and is configured to control the light sensing units 21 to obtain smoothness of the display object corresponding to the touched pixel unit 11, and the feedback units 31 generate corresponding feedback signals according to the smoothness. Through setting up control circuit 4, can unify the work of allotment light sense circuit 2 and feedback circuit 3, improve whole harmony and control accuracy. In an embodiment, the detecting unit 22 in the above embodiments may also be disposed in the control circuit 4, and the specific disposition position of the detecting unit 22 in the embodiment of the present application is not limited. It should be understood that fig. 4 is only a schematic circuit connection structure of the control circuit 4 and the light sensing circuit 2 and the feedback circuit 3, and does not represent a specific positional relationship between the control circuit 4 and the light sensing circuit 2 and the feedback circuit 3, and in an embodiment, the control circuit 4 may be disposed at a side of the pixel array layer 1 and the feedback film layer (as shown in fig. 5), but it should be understood that the control circuit 4 may also be disposed at other positions, for example, between the pixel array layer 1 and the feedback film layer, and the like, which is not limited in this embodiment of the present application.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (10)
1. A display panel with touch feedback, comprising:
a light sensing circuit integrated on the pixel array layer; and
the feedback circuit is stacked with the light sensing circuit and is in communication connection with the light sensing circuit;
the light sensing circuit acquires the smoothness of a display object corresponding to a touched pixel unit; the feedback circuit generates a corresponding feedback signal according to the smoothness.
2. The display panel of claim 1, wherein the light sensing circuit obtains smoothness of a display object corresponding to the touched pixel unit according to a slope of a tangent line of a luminance curve of the touched pixel unit.
3. The display panel of claim 2, wherein the light sensing circuit comprises a plurality of light sensing units, each of the light sensing units corresponds to one of the pixel units in the pixel array layer for obtaining the brightness of the pixel unit.
4. The display panel of claim 3, wherein the photo sensing unit comprises a photodiode and a storage capacitor, wherein an anode of the photodiode is connected to a power source, and a cathode of the photodiode is connected to the storage capacitor, and wherein the pixel unit illuminates the photodiode to charge the storage capacitor.
5. The display panel according to claim 4, wherein the photo sensing circuit comprises a detection unit electrically connected to the storage capacitors, and the detection unit detects the amount of power stored in each of the storage capacitors.
6. The display panel of claim 5, wherein the photo sensing unit further comprises a switch tube disposed between the detection unit and the storage capacitor, and the switch tube is periodically opened and closed.
7. The display panel according to claim 6, wherein the switching tube comprises a thin film transistor.
8. The display panel of claim 1, wherein the feedback circuit comprises a plurality of feedback units, each of the feedback units corresponding to one of the pixel units in the pixel array layer.
9. The display panel according to claim 8, wherein the feedback unit comprises a vibration unit that generates vibration of a corresponding frequency and/or magnitude according to the smoothness.
10. The display panel according to claim 1, further comprising a control circuit electrically connected to the light sensing circuit and the feedback circuit, respectively.
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| CN201910959133.4A CN110764643B (en) | 2019-10-10 | 2019-10-10 | Display panel with touch feedback |
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| CN201910959133.4A CN110764643B (en) | 2019-10-10 | 2019-10-10 | Display panel with touch feedback |
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| CN110764643B CN110764643B (en) | 2023-08-25 |
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Cited By (1)
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| CN113948028A (en) * | 2021-03-05 | 2022-01-18 | 友达光电股份有限公司 | Display and display method |
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