Multi-point touch panel

Abstract

The invention provides a multi-point touch screen, which is a rectangular frame structure. The surrounding area of the frame is matched with the display screen area for installing the touch screen; an illuminating belt matched with the side length of the frame is arranged beside the frame to be as a reference; the illuminating belt reference surrounds an identification area, a sensor component is arranged on the corner of the frame; the sensor component includes an image sensor, an optical lens and a light filter. With 90-degree visual angle of the senor paralleling above the direction of the recognized area, the sensor covers the whole identification area; the visual angle vertical to the direction of the identification area ensures that the reference is in the visual angle of the sensor and the object entering the identification area to be captured by the sensor. The sensor is connected with a controller; the controller is provided with a communication port connected with an upper computer for data communication; the controller includes data for controlling a code reading sensor and the controller or the upper computer includes data processing code for handling the sensor data. The position and the size of the touch object are calculated according to the data. The touch screen achieves a large-size multi-point touch screen at low cost.

Description

technical field [0001] The invention relates to a touch screen for a human-computer interaction interface. Background technique [0002] According to the working principle of the touch screen and the medium for transmitting information, we divide the touch screen into four types, which are resistive, infrared, capacitive inductive, and surface acoustic wave. There are also some technical solutions with less applications, such as (optical image Identification method (publication number CN 1635541A, hereinafter referred to as scheme A)). Resistive, infrared, capacitive sensing and surface acoustic wave touch screens all have an Achilles’ heel, that is, the cost increases geometrically with the increase in size. Large-size touch screens are hardly used in civilian applications. Although Solution A can solve the cost of large-size touch screens This problem, but there are many limitations in practical applications, and the practical value is low. The premise of plan A is that ...

AI Technical Summary

Problems solved by technology

Due to the structural limitations of scheme A, accurate recognition of touch actions cannot be made

According to the number of recognized touch points, it is divided into single-point touch screen and multi-point touch screen. Single-point touch screen can only recognize one touch point, and multi-point touch screen can recognize multiple touch points. Compared with single-point touch screen, the structure of multi-point touch screen is more complicated. The price is also more expensive. At present, almost all large-size multi-touch screens are in the experimental stage

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