Touch panel based on triboelectrification, a display device and a controlling method therefor
The present disclosure provides a touch panel based on triboelectrification, a display device and a controlling method therefor. The touch panel based on triboelectrification includes a cover plate; a touch sensing electrode, provided at one side of the cover plate; a transparent friction layer, provided at a side of the touch sensing electrode opposite to the cover plate, and arranged to contact with the touch sensing electrode; an elastic component layer, provided at a side of the transparent friction layer opposite to the touch sensing electrode and arranged to contact with the transparent friction layer, and including a plurality of elastic components spaced apart from each other; and a touch driving electrode, provided at a side of the elastic component layer opposite to the transparent friction layer, and arranged to contact with the elastic component layer. The plurality of elastic components in the elastic component layer vibrate in response to touch actions on the cover plate, so that the transparent friction layer becomes in contact with the touch driving electrode by means of friction, and thus a touch driving voltage is generated between the touch sensing electrode and the touch driving electrode. The touch panel based on triboelectrification can achieve the touch display of the display device without power supply.
1. A touch panel based on triboelectrification, comprising:
a cover plate;
a touch sensing electrode, provided at one side of the cover plate;
a transparent friction layer, provided at a side of the touch sensing electrode opposite to the cover plate, and arranged to contact with the touch sensing electrode;
an elastic component layer, provided at a side of the transparent friction layer opposite to the touch sensing electrode and arranged to contact with the transparent friction layer, wherein the elastic component layer comprises a plurality of elastic components spaced apart from each other; and
a touch driving electrode, provided at a side of the elastic component layer opposite to the transparent friction layer, and arranged to contact with the elastic component layer;
wherein the plurality of elastic components in the elastic component layer are configured to vibrate in response to touch actions on the cover plate, so that the transparent friction layer frictionally contacts with the touch driving electrode, and thus a touch driving voltage is generated between the touch sensing electrode and the touch driving electrode;
wherein the elastic components are mainly composed of a photo resist material; and
wherein the photo resist material comprises 50-90% ether or ester solvent, 5-20% acrylic ester monomers, 5-7% acrylic ester polymer, 0.1-2% disperser, and 0.1-5% initiator.
2. The touch panel based on triboelectrification according to claim 1 , wherein a material of the transparent friction layer comprises Fluorinated Ethylene Propylene copolymer.
3. The touch panel based on triboelectrification according to claim 1 , wherein a deformation rate of the elastic components is 10-15%, and a rebound ratio thereof is larger than or equal to 95%.
4. The touch panel based on triboelectrification according to claim 1 , wherein the photo resist material further comprises at least one of acrylic particles and inorganic filler particles.
5. The touch panel based on triboelectrification according to claim 4 , wherein the inorganic filler particles comprise calcium carbonate having a grain size of 1-11 μm, ultra-fine ceramic having a grain size of 0.09 μm, or a silastic sphere having a grain size of 3-10 μm.
6. The touch panel based on triboelectrification according to claim 3 , wherein the elastic components have a thickness in a range of 5-40 μm.
7. The touch panel based on triboelectrification according to claim 3 , wherein a cross-section of the elastic components parallel to the cover plate has a shape of a circle, rectangle or triangle, and a longitudinal cross-section of the elastic components perpendicular to the cover plate has a shape of a trapezoid.
8. The touch panel based on triboelectrification according to claim 1 , wherein the touch sensing electrode comprises a plurality of strip-like sub-electrodes arranged along a first direction, and the touch driving electrode comprises a plurality of strip-like sub-electrodes arranged along a second direction, wherein the first direction intersects with the second direction.
9. The touch panel based on triboelectrification according to claim 1 , wherein a material for forming the touch sensing electrode and the touch driving electrode comprises a transparent conductive material.
10. The touch panel based on triboelectrification according to claim 1 , wherein a material for forming the cover plate is a glass or resin material having a dielectric constant of 3.5-3.7.
11. A display device, comprising a display panel and the touch panel based on triboelectrification according to claim 1 , the touch panel based on triboelectrification being provided at a display side of the display panel.
12. The display device according to claim 11 , wherein the display device further comprises a pressure sampler, a driver and a vibrator; wherein:
the pressure sampler is connected with the touch panel based on triboelectrification and the driver, and is configured to sample touch pressures on the touch panel based on triboelectrification and send a sampling signal to the driver;
the driver is also connected to the vibrator, and configured to drive the vibrator to vibrate according to the sampling signal; and
the vibrator is also connected to the touch panel based on triboelectrification, and configured to drive the elastic components in the touch panel based on triboelectrification to vibrate.
13. The display device according to claim 11 , wherein the touch panel based on triboelectrification is bonded to the display panel at a periphery thereof by an adhesive layer, and the adhesive layer has a thickness in a range of 0.4-0.6 mm.
14. The display device according to claim 13 , wherein an insulation layer and a shielding layer which contact with each other, are provided between the touch panel based on triboelectrification and the display panel, wherein the insulation layer contacts with the touch panel based on triboelectrification, and the shielding layer contacts with the adhesive layer.
15. The display device according to claim 11 , wherein the display panel is a LCD display panel, wherein a polarizer is provided between the cover plate and the touch sensing electrode of the touch panel based on triboelectrification.
16. The display device according to claim 11 , wherein the display panel is a LCD display panel, wherein an antireflection layer is provided between the cover plate and the touch sensing electrode of the touch panel based on triboelectrification.
17. A controlling method for a display device according to claim 12 , wherein the controlling method comprises:
receiving a touch signal by the touch panel based on triboelectrification;
sampling touch pressures on the touch panel based on triboelectrification by the pressure sampler according to the touch signal, and sending the sampling signal to the driver;
driving the vibrator to vibrate by the driver according to the sampling signal; and
making the elastic components in the touch panel based on triboelectrification vibrate under driving of the vibrator, so that the transparent friction layer in the touch panel based on triboelectrification and the touch driving electrode frictionally interact with each other and charges are generated, thereby generating a touch driving voltage between the touch driving electrode and the touch sensing electrode.