Touch input device

• US 8,587,531 B2
• Filed: 06/10/2009
• Issued: 11/19/2013
• Est. Priority Date: 06/10/2009
• Status: Active Grant

• Current Assignee: Chunghwa Picture Tubes Limited
• Original Assignee: Chunghwa Picture Tubes Limited
• Inventors: Hsieh, Ming-Ta, Lin, Chien-Ming, Liu, Chia-Lin, Chen, Chih-Chung, Yin, Hsueh-Fang
• Primary Examiner(s): Shalwala, Bipin
• Assistant Examiner(s): CHOWDHURY, AFROZA Y
• Application Number:
  US12/481,928
• Publication Number:
  US 20100315347A1
• Time in Patent Office: 1,623 Days
• Field of Search: 345/156, 345/173, 345/174, 345/76, 178 1801- 1803
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch input device includes a substrate, plural sensible conductive layers and plural first switch units. The substrate is provided with an upper surface, the sensible conductive layers are all configured on the upper surface and are arranged in columns and rows. The first switch units are configured on the substrate and are electrically connected with the sensible conductive layers. By the first switch units, same columns of the sensible conductive layers can conduct electrically with one another and same rows of the sensible conductive layers can conduct electrically with one another.

Claims

1. A touch input device, comprising:

a substrate which is provided with an upper surface;

a plurality of sensible conductive layers, all of which are configured on the upper surface of the substrate and are arranged in columns and rows; and

a plurality of first switch units, which are configured on the substrate and are electrically connected with the sensible conductive layers, such that one of a step A and a step B is completed by the first switch units, and the other one of the step A and the step B is not completed by the first switch units, wherein the step A is that the sensible conductive layers of same columns conduct electrically with one another, and the step B is that the sensible conductive layers of same rows conduct electrically with one another;

wherein each first switch unit includes;

two transistors, one of which is connected between two neighboring sensible conductive layers of a same column of the sensible conductive layers, and the other one of which is electrically connected between two neighboring sensible conductive layers of a same row of the sensible conductive layers, with each transistor being provided with an activation end, a first output end and a first input end; and

an inverter, which is provided with an output end and an input end, wherein the input end of the inverter is electrically connected with the activation end of one transistor and the output end of the inverter is electrically connected with the activation end of the other transistor.

2. The touch input device according to claim 1, wherein at least one transistor is a bipolar transistor.

3. The touch input device according to claim 1, further comprising a plurality of second switch units, and the upper surface of the substrate is provided with a column edge, with each second switch unit being electrically connected with one of the sensible conductive layers that are adjacent to the column edge, among each row of the sensible conductive layers.

4. The touch input device according to claim 3, further comprising a plurality of third switch units, and the upper surface of the substrate is further provided with a row edge connected to the column edge, with each third switch unit being electrically connected with one of the sensible conductive layers that are adjacent to the row edge, among each column of the sensible conductive layers.

5. The touch input device according to claim 4, further comprising:

a chip having a plurality of input-output contacts;

a plurality of first connecting wires, being electrically connected between the third switch units and the input-output contacts, respectively; and

a plurality of second connecting wires, being electrically connected between the second switch units and the first connecting wires, respectively.

6. The touch input device according to claim 5, wherein the chip is further provided with a clock generation end which is electrically connected with the input end of the inverter, and the chip outputs a clock signal from the clock generation end to the inverter.

7. The touch input device according to claim 1, further includes a protection layer configured on the upper surface of the substrate to cover the sensible conductive layers.

8. The touch input device according to claim 7, wherein the protection layer is transparent.

9. The touch input device according to claim 1, wherein each first switch unit is electrically connected between two neighboring sensible conductive layers in a same column of the sensible conductive layers, and is electrically connected between two neighboring sensible conductive layers in a same row of the sensible conductive layers.

10. The touch input device according to claim 9, wherein the first switch units are all configured on the upper surface of the substrate, are located between two neighboring sensible conductive layers in same columns of the sensible conductive layers, and are located between two neighboring sensible conductive layers in same rows of the sensible conductive layers.

11. The touch input device according to claim 10, wherein the sensible conductive layer is a transparent conducting film.

12. The touch input device according to claim 11, wherein the transparent conducting film is made by indium-tin oxide or indium-zinc oxide.

13. The touch input device according to claim 10, wherein the substrate is a transparent plate.

14. The touch input device according to claim 13, wherein the transparent plate is made by glass, aluminum oxide or a polymer.

15. The touch input device according to claim 9, wherein the substrate is further provided with a lower surface which is opposite to the upper surface, and the first switch units are all configured on the lower surface.

16. The touch input device according to claim 15, wherein the first switch units are integrated into at least one chip.

17. The touch input device according to claim 15, wherein the substrate and the sensible conductive layers are integrated into a circuit board.