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Two-point detection method and equipment for resistive touch screen

A touch screen and resistive technology, which is applied in the field of multi-point detection of resistive touch screen, can solve the problems of high price and high cost of capacitive touch screen, and achieve the effect that multi-point detection cannot be solved

Active Publication Date: 2013-05-15
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, although some capacitive touch screens can achieve multi-point detection, the cost of capacitive touch screens is high, and their prices are more expensive than resistive touch screens

Method used

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  • Two-point detection method and equipment for resistive touch screen
  • Two-point detection method and equipment for resistive touch screen
  • Two-point detection method and equipment for resistive touch screen

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Embodiment Construction

[0021] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0023] The first embodiment of the present invention relates to a two-point detection method of a resistive touch screen, the specific process is as follows figure 2 shown.

[0024] In step 210, calculate the terminal voltage V of the series resistor when the electric field is applied to the y-axis and x-axis respectively ADC1_0 , V ADC1_1 , V...

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Abstract

The invention relates to a touch screen technique and discloses a two-point detection method and two-point detection equipment for a resistive touch screen. The two-point detection method comprises the following steps of: measuring voltage values VADC1_0, VADC1_1, VADC2_0 and VADC2_1 at the series resistor end by using series resistors; and if a difference value delta Vy of the VADC1_1 and the VADC1_0 is more than or equal to VTy which is a first preset threshold, or if a difference value delta Vx of the VADC2_1 and the VADC2_0 is more than or equal to VTx which is a second preset threshold, detecting that two points are pressed down, so that the problem that the resistive touch screen cannot perform multi-point detection is solved and the application to software operation can be enriched.

Description

technical field [0001] The invention relates to touch screen technology, in particular to multi-point detection technology of resistive touch screen. Background technique [0002] With the continuous development of science and technology, touch screens have been widely used in our daily life. For the technology of touch screens, please refer to US Patent No. 6072475. At present, there are several types of touch screens, namely: resistive, capacitive (surface capacitive and inductive capacitive), surface acoustic wave, infrared, bending wave, active digital converter and optical imaging. Among them, the resistive touch screen is controlled by using pressure sensing. Capacitive touchscreens work by utilizing the human body's current sensing. The infrared touch screen uses the dense infrared matrix in the X and Y directions to detect and locate the user's touch. Surface acoustic wave is a kind of ultrasonic wave, a mechanical energy wave that propagates shallowly on the surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/045
Inventor 梁旺平薛飞
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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