METHOD FOR MANUFACTURING TOUCH INPUT DEVICE AND TOUCH INPUT DEVICE

• US 20190025970A1
• Filed: 07/11/2018
• Published: 01/24/2019
• Est. Priority Date: 07/18/2017
• Status: Active Grant

• Current Assignee: HiDeep Inc.
• Original Assignee: HiDeep Inc.
• Inventors: Kim, Bonkee, Kim, Seyeob
• Granted Patent: US 10,817,091 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/133351 Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133528 Polarisers
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• 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 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0414 using force sensing means to determine a position
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/126 Shielding, e.g. light-blocking means over the TFTs
• CPC Class Codes: H10K 59/131 : Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/40 : OLEDs integrated with touch screens
• CPC Class Codes: H10K 71/18 : using non-liquid printing techniques, e.g. thermal transfer printing from a donor sheet
• CPC Class Codes: H10K 71/80 : using temporary substrates
• CPC Class Codes: H10K 77/111 : Flexible substrates

Abstract

A method for manufacturing a touch input device may be provided. The method includes: a display forming step of forming a flexible display for a plurality of display devices on one carrier substrate, cutting the flexible display into individual pieces, and separating the flexible display from the carrier substrate; a pressure sensor forming step of forming a pressure sensor for the plurality of display devices on one substrate for the pressure sensor and cutting the substrate for the pressure sensor into individual pieces; and an adhering step of adhering the separated flexible display to the substrate for the pressure sensor, which has been cut into individual pieces. According to the embodiment of the present invention, the pressure sensor can be easily implemented on the flexible display.

Claims

1. A method for manufacturing a touch input device, the method comprising:

a display forming step of forming a flexible display for a plurality of display devices on one carrier substrate, cutting the flexible display into individual pieces, and separating the flexible display from the carrier substrate;

a pressure sensor forming step of forming a pressure sensor for the plurality of display devices on one substrate for the pressure sensor and cutting the substrate for the pressure sensor into individual pieces; and

an adhering step of adhering the separated flexible display to the substrate for the pressure sensor, which has been cut into individual pieces.

2. The method of claim 1, wherein the substrate for the pressure sensor is not relatively easily bent as compared to the flexible display.

3. The method of claim 1, wherein the display forming step comprises:

forming a second substrate layer on the carrier substrate;

forming an organic material layer on the second substrate layer;

forming a first substrate layer on the organic material layer;

cutting the flexible display comprising the first substrate layer, the organic material layer, and the second substrate layer into individual pieces; and

separating the cut flexible display from the carrier substrate by irradiating laser.

4. The method of claim 1, wherein the pressure sensor comprises a pressure electrode capable of detecting a touch pressure on the basis of a capacitance change amount according to the touch pressure on the touch input device.

5. The method of claim 1, wherein the pressure sensor comprises a strain gauge capable of detecting a touch pressure on the basis of a change of a resistance value due to the touch pressure on the touch input device.

6. The method of claim 1, further comprising disposing a light shielding layer for shielding the pressure sensor from light.

7. A touch input device comprising:

a cut flexible display which is cut into individual pieces for a plurality of display devices and is separated from a carrier substrate;

a cut substrate for a pressure sensor, which is cut into individual pieces for the plurality of display devices and has the pressure sensor formed thereon; and

an adhesive which adheres the separated cut flexible display to the substrate for the pressure sensor, which is cut into individual pieces.

8. The touch input device of claim 7, wherein the cut substrate for the pressure sensor is not relatively easily bent as compared to the flexible display.

9. The touch input device of claim 7, wherein the cut flexible display is formed by

forming a second substrate layer on the carrier substrate;

forming an organic material layer on the second substrate layer;

forming a first substrate layer on the organic material layer;

cutting the flexible display comprising the first substrate layer, the organic material layer, and the second substrate layer into individual pieces; and

separating the cut flexible display from the carrier substrate by irradiating laser.

10. The touch input device of claim 7, wherein the pressure sensor comprises a pressure electrode capable of detecting a touch pressure on the basis of a capacitance change amount according to the touch pressure on the touch input device.

11. The touch input device of claim 7, wherein the pressure sensor comprises a strain gauge capable of detecting a touch pressure on the basis of a change of a resistance value due to the touch pressure on the touch input device.

12. The touch input device of claim 7, further comprising a light shielding layer for shielding the pressure sensor from light.

13. A method for manufacturing a touch input device, the method comprising:

a step of forming a flexible display for a plurality of display devices on one carrier substrate;

a step of separating the flexible display from the carrier substrate;

a step of forming a pressure sensor for the plurality of display devices on one substrate for the pressure sensor;

a step of adhering the separated flexible display to the substrate for the pressure sensor; and

a step of cutting the substrate for the pressure sensor and the flexible display which have been adhered to each other into individual pieces.

14. The method of claim 13, wherein the substrate for the pressure sensor is not relatively easily bent as compared to the flexible display.

15. The method of claim 13, wherein the pressure sensor comprises a pressure electrode capable of detecting a touch pressure on the basis of a capacitance change amount according to the touch pressure on the touch input device.

16. The method of claim 13, wherein the pressure sensor comprises a strain gauge capable of detecting a touch pressure on the basis of a change of a resistance value due to the touch pressure on the touch input device.

17. The method of claim 13, further comprising disposing a light shielding layer for shielding the pressure sensor from light.