Three-dimensional Touch Screen and Touch Foil Structure

• US 20180275792A1
• Filed: 12/25/2015
• Published: 09/27/2018
• Est. Priority Date: 12/25/2015
• Status: Abandoned Application

• Current Assignee: Whu Lunfeng Electronic Technology Co., Ltd.
• Original Assignee: Whu Lunfeng Electronic Technology Co., Ltd.
• Inventors: Hu, Chuan
• Application Number:
  US15/763,835
• Publication Number:
  US 20180275792A1
• Time in Patent Office: Days
• CPC Class Codes: G06F 1/1643 the display being associated to a digitizer, e.g. laptops that can be used as penpads details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615
• CPC Class Codes: G06F 1/1656 Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories mounting of accessories to a computer display G06F1/1607; display hoods G06F1/1603; cooling arrangements for portable computers G06F1/203
• CPC Class Codes: G06F 2203/04104 Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
• CPC Class Codes: G06F 2203/04105 Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells

Abstract

A three-dimensional touch screen and a touch foil structure are provided, wherein the three-dimensional touch screen comprises a display screen; a touch foil structure adhered to an upper surface of the display screen; and a glass cover plate covering an upper surface of the touch foil structure; wherein the touch foil structure comprises a first conductive layer, a second conductive layer and a third conductive layer in sequence from bottom to top, and an insulating particulate layer is arranged between the first conductive layer and the second conductive layer. The three-dimensional touch screen of the present invention has a reduced thickness and a higher sensitivity and thus a better user experience. The present invention is fully compatible with multi-touch two-dimensional capacitive screen. It realizes three-dimensional touch and uses a hard cover at the same time, which can further improve reliability and user experience.

Claims

1. A three-dimensional touch screen, characterized in that the three-dimensional touch screen comprises:

a display screen;

a touch foil structure adhered to an upper surface of the display screen; and

a glass cover plate covering an upper surface of the touch foil structure;

wherein the touch foil structure comprises a first conductive layer, a second conductive layer and a third conductive layer in sequence from bottom to top, and an insulating particulate layer is arranged between the first conductive layer and the second conductive layer;

wherein whether there is a pressure signal or not is determined by measuring a change in capacitance or a short circuit between the first conductive layer and the second conductive layer, and a location where the touch signal is generated is determined by scanning capacitance between the second and third conductive layers and a surrounding.

2. The three-dimensional touch screen according to claim 1, characterized in that the three-dimensional touch screen further comprises a first substrate and a second substrate, wherein the first conductive layer is disposed on an upper surface of the first substrate, the second conductive layer is disposed on a lower surface of the second substrate, and the third conductive layer is disposed on an upper surface of the second substrate.

3. The three-dimensional touch screen of claim 1, characterized in that the three-dimensional touch screen further comprises a first substrate, a second substrate and a third substrate, wherein the first conductive layer is disposed on an upper surface of the first substrate, the second conductive layer is disposed on an upper surface of the second substrate, and the third conductive layer is disposed on an upper surface of the third substrate.

4. The three-dimensional touch screen according to claim 1, characterized in that the three-dimensional touch screen further comprises a first substrate, a second substrate and a third substrate, wherein the first conductive layer is disposed on an upper surface of the first substrate, the second conductive layer is disposed on a lower surface of the second substrate, and the third conductive layer is disposed on an upper surface of the third substrate.

5. The three-dimensional touch screen according to claim 1, characterized in that a conductive pattern of the first conductive layer and a conductive pattern of the second conductive layer each is in the form of a plurality of bar-shaped blocks arranged in parallel, and the conductive pattern of the first conductive layer is parallel or perpendicular to the conductive pattern of the second conductive layer.

6. The three-dimensional touch screen according to claim 1, characterized in that a conductive pattern of the first conductive layer is in the form of a plurality of bar-shaped blocks arranged in parallel, and a conductive pattern of the second conductive layer is in the form of a plurality of independent conductive blocks.

7. The three-dimensional touch screen according to claim 1, characterized in that the insulating particle layer comprises a plurality of insulating particles, wherein each of the insulating particles has a thickness of 5 to 50 μ

m, and a distance between adjacent insulating particles is 2 to 7 mm.

8. The three-dimensional touch screen of claim 7, characterized in that the insulating particles have a thickness of 15 to 25 μ

m.

9. The three-dimensional touch screen according to claim 1, characterized in that the conductive patterns of the first conductive layer and the second conductive layer are made of ITO or nano-silver material.

10. The three-dimensional touch screen according to claim 1, characterized in that the display screen and the touch foil structure as well as the touch foil structure and the glass cover plate are bonded by an OCA Adhesive.

11. The three-dimensional touch screen according to claim 2, characterized in that the so called substrates are made of PET material.

12. The three-dimensional touch screen according to claim 1, characterized in that when the pressure exerted by a user on the three-dimensional touch screen is greater than or equal to 300 g, the first conductive layer and the second conductive layer come into contact with each other and are short-circuited, and when the pressure exerted by a user on the three-dimensional touch screen is in the range of 50 to 300 g, the capacitance values of the first conductive layer and the second conductive layer change.

13. A touch foil structure, characterized in that the touch foil structure comprises a first conductive layer, a second conductive layer and a third conductive layer in sequence from bottom to top, wherein insulating particles are disposed between the first conductive layer and the second conductive layer, wherein a conductive pattern of the first conductive layer is parallel or perpendicular to a conductive pattern of the second conductive layer, and wherein whether there is a pressure signal or not is determined by measuring a change in capacitance or a short circuit between the first conductive layer and the second conductive layer, and a location where the touch signal is generated is determined by scanning capacitance between the second and third conductive layers and a surrounding.

14. The touch foil structure as claimed in claim 13, characterized in that the three-dimensional touch screen further comprises a first substrate and a second substrate, wherein the first conductive layer is disposed on an upper surface of the first substrate, the second conductive layer is disposed on a lower surface of the second substrate, and the third conductive layer is disposed on an upper surface of the second substrate.

15. The touch foil structure as claimed in claim 13, characterized in that the three-dimensional touch screen further comprises a first substrate, a second substrate and a third substrate, wherein the first conductive layer is disposed on an upper surface of the first substrate, the second conductive layer is disposed on an upper surface of the second substrate, and the third conductive layer is disposed on an upper surface of the third substrate.

16. The touch foil structure as claimed in claim 13, characterized in that the three-dimensional touch screen further comprises a first substrate, a second substrate and a third substrate, wherein the first conductive layer is disposed on an upper surface of the first substrate, the second conductive layer is disposed on a lower surface of the second substrate, and the third conductive layer is disposed on an upper surface of the third substrate.

17. The touch foil structure according to claim 13, characterized in that a conductive pattern of the first conductive layer and a conductive pattern of the second conductive layer each is in the form of a plurality of bar-shaped blocks arranged in parallel.

18. The touch foil structure according to claim 13, characterized in that a conductive pattern of the first conductive layer is in the form of a plurality of bar-shaped blocks arranged in parallel, and a conductive pattern of the second conductive layer is in the form of a plurality of independent conductive blocks.

19. The touch foil structure according to claim 14, characterized in that a conductive pattern of the first conductive layer is in the form of a plurality of bar-shaped blocks arranged in parallel, and a conductive pattern of the second conductive layer is in the form of a plurality of independent conductive blocks.

20. The touch foil structure according to claim 15, characterized in that a conductive pattern of the first conductive layer is in the form of a plurality of bar-shaped blocks arranged in parallel, and a conductive pattern of the second conductive layer is in the form of a plurality of independent conductive blocks.