TOUCH SCREEN PANEL

• US 20120313866A1
• Filed: 04/24/2012
• Published: 12/13/2012
• Est. Priority Date: 06/10/2011
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Ha, Sang-Kwon, Lee, Joo-Hyung, Pak, Sang-Jin, Lee, Ji-Gong, Hwang, Hee-Chul
• Granted Patent: US 9,189,100 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• 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: G09G 3/3692 suitable for passive matrices only
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

Abstract

A touch screen panel is disclosed. The touch screen panel includes a pixel unit, a touch sensing unit, and a data driver configured to provide data voltages to the pixel unit and to provide driving signals to the touch sensing unit.

Claims

1. A touch screen panel, comprising:

a pixel unit including pixels coupled to scan lines and data lines;

a touch sensing unit including driving electrodes and sensing electrodes;

a scan driver configured to supply scan signals to the pixels through the scan lines;

a data driver comprising;

a data voltage outputting unit configured to;

receive a plurality of gray level voltages,

generate data voltages based on the gray level voltages and corresponding to image data, and

supply the data voltages to the pixels through the data lines, and

a driving signal outputting unit configured to supply driving signals to the driving electrodes; and

a touch controller configured to detect sensing signals output from the sensing electrodes.

2. The touch screen panel as claimed in claim 1, wherein the touch controller supplies first control signals and second control signals to the driving signal outputting unit when a touch synchronizing signal is supplied to the touch controller.

3. The touch screen panel as claimed in claim 2, wherein the driving signal outputting unit comprises:

a voltage varying unit configured to vary voltage levels of the first control signals to generate the driving signals; and

a distributing unit configured to provide the driving signals to the driving electrodes according to the second control signals.

4. The touch screen panel as claimed in claim 3, wherein the data driver further comprises a gray level voltage generator configured to receive an uppermost voltage and to generate the plurality of gray level voltages based on the uppermost voltage and to supply the generated gray level voltages to the data voltage outputting unit.

5. The touch screen panel as claimed in claim 4, wherein the voltage varying unit boosts voltage levels of the first control signals to be substantially the same voltage level as the voltage level of the uppermost voltage.

6. The touch screen panel as claimed in claim 4, wherein the data voltage outputting unit comprises:

a shift register unit configured to sequentially generate sampling signals;

a sampling latch unit configured to sequentially store the image data according to the sampling signals;

a holding latch unit configured to temporarily store the image data stored in the sampling latch unit;

a digital-to-analog (DA) converter configured to;

select gray level voltages corresponding to image data supplied from the holding latch unit, gray level voltages being selected from a plurality of gray level voltages output from the gray level voltage generating unit, and

output the selected gray level voltages as data voltages; and

a buffer unit configured to transmit the data voltages to the data lines.

7. The touch screen panel as claimed in claim 2, further comprising a timing controller configured to control the scan driver and the data driver.

8. The touch screen panel as claimed in claim 7, wherein the image data are supplied from the timing controller.

9. The touch screen panel as claimed in claim 7, wherein the touch synchronizing signal is supplied from the timing controller.

10. The touch screen panel as claimed in claim 2, wherein a duration of the second control signals is larger than a duration of the first control signals.

11. The touch screen panel as claimed in claim 1, wherein the pixel unit and the touch sensing unit overlap.

12. The touch screen panel as claimed in claim 1, wherein the driving electrodes and the sensing electrodes are formed in different layers.

13. The touch screen panel as claimed in claim 1, wherein the driving electrodes and the sensing electrodes are formed in the same layer.

14. The touch screen panel as claimed in claim 1, wherein the driving electrodes and the sensing electrodes cross each other.

15. A touch screen panel, comprising:

a pixel unit configured to display an image according to image data;

a touch sensing unit comprising driving electrodes and sensing electrodes;

a data driver configured to provide image data to the pixel unit and to provide control signals to the driving electrodes;

a touch controller configured to detect sensing signals from the sensing electrodes,

wherein timing of both the image data and the control signals is based on a synchronizing signal.

16. The touch screen panel as claimed in claim 15, wherein the touch controller provides first control signals and second control signals to the data driver according to the synchronizing signal.

17. The touch screen panel as claimed in claim 16, wherein the data driver comprises:

a voltage varying unit configured to receive the first control signals and to generate the driving signals based on the first control signals; and

a distributing unit configured to receive the second control signals and to provide the driving signals to the driving electrodes according to the second control signals.

18. The touch screen panel as claimed in claim 17, wherein the first control signals determine a frequency of the driving signals.

19. The touch screen panel as claimed in claim 17, wherein the second control signals determine which driving electrodes receive the driving signals.

20. The touch screen panel as claimed in claim 17, wherein the voltage varying unit boosts the first control signals C1 to a power voltage to generate the driving signals.