METHOD FOR DRIVING TOUCH PANEL

• US 20140240282A1
• Filed: 02/25/2014
• Published: 08/28/2014
• Est. Priority Date: 02/28/2013
• Status: Abandoned Application

• Current Assignee: Dongbu HiTek Co., Ltd. (DB HiTek Co., Ltd.)
• Original Assignee: Dongbu HiTek Co., Ltd. (DB HiTek Co., Ltd.)
• Inventors: HWANG, Tae Ho
• Application Number:
  US14/189,592
• Publication Number:
  US 20140240282A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: F21K 9/60 Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
• CPC Class Codes: F21K 9/61 using light guides
• CPC Class Codes: F21K 9/62 using mixing chambers, e.g. housings with reflective walls
• CPC Class Codes: F21S 4/20 with light sources held by or within elongate supports
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02F 1/133603 with LEDs
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 1/133611 including means for improving the brightness uniformity
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/181 Encapsulation

Abstract

A method for driving a touch panel including driving lines, sensing lines, and node capacitors between neighboring and/or overlapping driving lines and sensing lines is disclosed. The method includes selecting two or more of the driving lines, and simultaneously driving the selected driving lines with driving signals. Each driving signal has three or more voltages of different levels.

Claims

1. A method for driving a touch panel including driving lines, sensing lines, and node capacitors between neighboring and/or overlapping driving lines and sensing lines, comprising:

selecting two or more of the driving lines; and

simultaneously driving the selected driving lines with driving signals,

wherein each driving signal has three or more voltages of different levels.

2. The method according to claim 1, wherein each driving signal is a periodic signal, and has three voltages of different levels during each period.

3. The method according to claim 2, wherein:

each driving signal comprises;

a first signal portion or time period having a first voltage level,

a second signal portion or time period having a second voltage level, and

a third signal portion or time period having a third voltage level; and

the first voltage level, the second voltage level, and the third voltage level are different from each other.

4. The method according to claim 3, wherein the first voltage level is higher than the second voltage level, and the second voltage level is higher than the third voltage level.

5. The method according to claim 4, wherein the first voltage level is a positive (+) voltage, the second voltage level is 0 or a ground potential, and the third voltage level is a negative (−

) voltage.

6. The method according to claim 4, wherein the first signal portion or time period and the third signal portion or time period alternate, and the second signal portion or time period is between the first signal portion or time period and the third signal portion or time period.

7. The method according to claim 3, wherein:

each driving signal has a duty ratio within a range of more than 0.25, but less than 1; and

the duty ratio of each driving signal is a ratio or percentage of a sum of a length of the first period and a length of the third signal portion or time period in each period of the driving signal.

8. The method according to claim 1, wherein the driving signals have a same phase.

9. The method according to claim 1, wherein the driving signal applied to at least one of the selected driving lines has a phase different from the driving signals applied to remaining driving lines.

10. The method according to claim 3, wherein the first signal portion or time period and the third signal portion or time period of each driving signal have equal lengths.

11. The method according to claim 6, wherein the second signal portion or time period is before the first signal portion or time period and/or after the third signal portion or time period.

12. A method for driving a touch panel including driving lines, sensing lines, and node capacitors between neighboring and/or overlapping driving lines and sensing lines, comprising:

selecting two or more of the driving lines; and

simultaneously driving the selected driving lines with driving signals,

wherein each driving signal is a periodic signal having a period comprising a first portion or time period in which the driving signal has a first voltage level, a second portion or time period in which the driving signal has a second voltage level lower than the first voltage level, and a third period in which the driving signal has a portion or time third voltage level lower than the second voltage level.

13. The method according to claim 12, wherein:

each driving signal has a duty ratio within a range of more than 0.25, but less than 1; and

the duty ratio of each driving signal is a ratio or percentage of a sum of a length of the first portion or time period and a length of the third portion or time period in each period of the driving signal.

14. The method according to claim 12, wherein at least a portion of the second portion or time period is between the first portion or time period and the third portion or time period.

15. The method according to claim 14, wherein a length of the first portion or time period and a length of the third portion or time period are equal.

16. The method according to claim 14, wherein the portion of the second portion or time period between the first portion or time period and the third portion or time period is shorter than the first portion or time period or the third portion or time period.

17. The method according to claim 12, wherein the driving signals have a same phase.

18. The method according to claim 12, wherein the driving signal applied to at least one of the selected driving lines has a phase different from the driving signals applied to remaining driving lines.

19. A method for driving a touch panel including driving lines, sensing lines, and node capacitors between neighboring and/or overlapping driving lines and sensing lines, comprising:

selecting two or more of the driving lines;

simultaneously driving the selected driving lines with driving signals having two voltages of different levels; and

receiving an overlapped or combined signal of the simultaneously-driven driving signals,

wherein the overlapped or combined signal is a periodic signal having three or more voltages of different levels.

20. The method according to claim 19, wherein the overlapped or combined signal has a period sequentially comprising a first portion or time period in which the overlapped or combined signal has a first voltage level, a second portion or time period in which the overlapped or combined signal has a second voltage level lower than the first voltage level, a third portion or time period in which the overlapped or combined signal has a third voltage level lower than the second voltage level, and a fourth portion or time period in which the overlapped or combined signal has the second voltage level.