ELECTROPHORESIS DISPLAY HAVING TOUCH SCREEN AND METHOD FOR DRIVING THE TOUCH SCREEN

• US 20120113031A1
• Filed: 10/27/2011
• Published: 05/10/2012
• Est. Priority Date: 11/10/2010
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: LEE, Sunghoon, SON, Howon
• Granted Patent: US 8,711,117 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

An electrophoresis display having a touch screen and a method for driving the touch screen are disclosed. The electrophoresis display includes an electrophoresis panel, an electrophoresis driving circuit, which is drives the electrophoresis panel and write an image to the electrophoresis panel, a touch screen panel mounted on the electrophoresis panel, a touch screen driving circuit which outputs coordinate data of a touch position on the touch screen panel based on a signal received from the touch screen panel, and a host system configured which recognize the coordinate data during a non-operation period of the electrophoresis panel as available data and recognize the coordinate data during an operation period of the electrophoresis panel as unavailable data.

Claims

1. An electrophoresis display comprising:

an electrophoresis panel;

an electrophoresis driving circuit configured to drive the electrophoresis panel and write an image to the electrophoresis panel;

a touch screen panel mounted on the electrophoresis panel;

a touch screen driving circuit configured to output coordinate data of a touch position on the touch screen panel based on a signal received from the touch screen panel; and

a host system configured to recognize the coordinate data during a non-operation period of the electrophoresis panel as available data and recognize the coordinate data during an operation period of the electrophoresis panel as unavailable data.

2. The electrophoresis display of claim 1, wherein a state change interrupt signal, a serial interface clock, and serial interface data including the coordinate data are transferred between the host system and the touch screen driving circuit,

wherein the host system controls the state change interrupt signal at a low logic level during the operation period of the electrophoresis panel and controls the state change interrupt signal at a high logic level during the non-operation period of the electrophoresis panel.

3. The electrophoresis display of claim 2, wherein the host system ignores data received from the touch screen driving circuit when the state change interrupt signal is at the low logic level.

4. The electrophoresis display of claim 2, wherein the touch screen driving circuit transfers the coordinate data to the host system only when the state change interrupt signal is at the high logic level.

5. The electrophoresis display of claim 3, wherein the touch screen driving circuit transfers the coordinate data to the host system irrespective of a logic level of the state change interrupt signal.

6. The electrophoresis display of claim 2, further comprising a timing controller configured to transfer image data to the electrophoresis driving circuit and control an operating timing of the electrophoresis driving circuit and an operating timing of the touch screen driving circuit,

wherein the host system transfers the image data to the timing controller, and at the same time, toggles the state change interrupt signal at the low logic level.

7. A method for driving a touch screen of an electrophoresis display including an electrophoresis panel, an electrophoresis driving circuit which drives the electrophoresis panel and writes an image to the electrophoresis panel, a touch screen panel mounted on the electrophoresis panel, and a touch screen driving circuit which outputs coordinate data of a touch position on the touch screen panel based on a signal received from the touch screen panel, the method comprising:

deciding whether or not the electrophoresis panel is driven;

recognizing the coordinate data during a non-operation period of the electrophoresis panel as available data; and

recognizing the coordinate data during an operation period of the electrophoresis panel as unavailable data.

8. The method of claim 7, further comprising:

generating a state change interrupt signal indicating whether or not the coordinate data is available; and

controlling the state change interrupt signal at a high logic level during the non-operation period of the electrophoresis panel.