A tactile touch screen

Abstract

The invention relates to a tactile touch screen, which acquires a real-time scene image through a camera, and processes it into a dot-matrix grayscale image in real time, and then transforms the grayscale signal of each pixel of the dot-matrix grayscale image into a The current, voltage, infrared or light intensity signal dot matrix of the controller is output to the tactile touch screen, and the displacement of the touch rod of each pixel of the display screen will change according to the corresponding control signal output. All points on the tactile touch screen The height of the surface formed by the combination of array touch sticks also changes accordingly, and the scene image is reproduced in the form of relief. Moreover, as the scene changes, the corresponding "grayscale" touch stick display components of the display device also change accordingly in real time , allowing the blind to perceive real-time external scene changes through the tactile touch screen. The size of the display screen of the present invention is relatively small, which is similar to the size of general mahjong, so that blind people can use the thumb or other finger pulps to cover the entire tactile touch screen.

Description

technical field [0001] The invention relates to a touch screen for visual image display, which belongs to the category of auxiliary identification equipment or auxiliary tools for visually impaired people. Background technique [0002] Blind people can recognize Braille or information on the surface of objects through touch. Traditional Braille is statically "written" on various papers. Later, various electronic dynamic Braille systems were developed. The principle is to simulate the movement of dot matrix touch sticks. Braille, such as figure 1 The electronic Braille system panel developed by the Institute of Electrical Engineering, Chinese Academy of Sciences (IEE CAS) in 2008 is shown. On this basis, a tactile touch screen has been developed. figure 2 It is a large-screen tactile image display developed by researchers in the United States and Japan. [0003] The existing tactile display device uses the executive switch to complete the movement of the touch stick array...

AI Technical Summary

Problems solved by technology

[0010] (1) It is large in size, similar to the size of the current computer monitor screen, and needs to be touched with two hands. The blind person has to touch the entire screen to have a screen of information concept. The speed of obtaining information is relatively slow, and they cannot carry it with them.

[0011] (2) There are generally only two working positions of the touch stick of the existing tactile touch screen, the touch stick or the original position, that is, only images of "black and white" can be displayed, or corresponding to Braille or text characters, while objects in nature The formed images are often in color or grayscale, and the light and shadow changes are continuous. The existing tactile touch screens are extremely poor in restoring real images;

[0012] (3) It can only display pre-stored content, which is generally used as a viewing display, and can only obtain the content input into the display storage unit in advance on fixed occasions. The refresh rate of the display itself is relatively slow, and it takes a few seconds to update a screen of images. Tens of seconds, unable to obtain real-time surrounding information

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