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Touch screen system in DDC (Display Data Channel) communication with computer and control method thereof

A touch screen, computer technology, applied in electrical digital data processing, data processing input/output process, instruments, etc., can solve the problem of large number of wires and high cost, and achieve the effect of reducing the number of wires, improving the response speed and reducing the cost.

Inactive Publication Date: 2012-10-10
TIANMA MICRO ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide a touch screen system for DDC communication with a computer, aiming to solve the problem of large number of wires and high cost caused by the USB interface communication between the current host and the touch screen controller

Method used

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  • Touch screen system in DDC (Display Data Channel) communication with computer and control method thereof
  • Touch screen system in DDC (Display Data Channel) communication with computer and control method thereof
  • Touch screen system in DDC (Display Data Channel) communication with computer and control method thereof

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Embodiment Construction

[0015] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0016] figure 1 The module structure of a touch screen system for DDC communication with a computer provided by the embodiment of the present invention is shown; for the convenience of description, only the part related to the embodiment of the present invention is shown, and the details are as follows:

[0017] The touch screen system includes: a host 1, a touch screen controller 2, a display interface 3, a display 4 and a touch screen 5; wherein, the display interface 3 is connected to the host 1 through the display data lines DDC SCL and DDC SDA, and the display 4 is connected to the di...

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Abstract

The invention is applied to the field of touch screens, and provides a touch screen system in DDC (Display Data Channel) communication with a computer and a control method thereof. The system comprises a host machine, a display interface, a display, a touch screen controller and a touch screen, wherein an IIC (Inter-Integrated Circuit) data transmission line of the touch screen controller is connected to a DDC of the display; when being touched, the touch screen can transmit detected information corresponding to an X coordinate axis and a Y coordinate axis to the touch screen controller, and the touch screen controller is used for converting the information of the X coordinate axis and the Y coordinate axis to position information of a touch point and storing to a register of a corresponding IIC interface; and the host machine acquires data in the register of the IIC interface, converts the data, and displays a touch position on the display or provides the position information of the touch point to other application programs. According to the invention, the communication between the host machine and a USB (Universal Serial Bus) interface of the touch screen controller is omitted, the quantity of wires for connecting the display with the host machine is reduced, the usage quantity of IC (Integrated Circuit) components can be reduced, a design is simplified, and the cost is reduced.

Description

technical field [0001] The invention belongs to the field of touch screens, and in particular relates to a touch screen system for DDC communication with a computer and a control method thereof. Background technique [0002] Touch screens are widely used in various fields of our daily life, such as mobile phones, media players, navigation systems, digital cameras, PDA displays, medical equipment, etc. Common touch screen technologies include resistive touch screens, capacitive touch screens, surface capacitive touch screens, surface Sonic touch screen, infrared touch screen. [0003] The capacitive touch screen is a transparent special metal conductive material pasted on the glass surface. When the finger touches the metal layer, the capacitance of the contact will change, so that the frequency of the oscillator connected to it will change. By measuring the frequency change, the touch position can be determined to obtain information. The capacitive touch screen is coated w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
Inventor 刘杰程松华吴韦建
Owner TIANMA MICRO ELECTRONICS CO LTD
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