A mechanical dot matrix display

Abstract

A mechanical dot-matrix displayer comprises a computer control subsystem, a movement controller and a dot-matrix salient point display subsystem, wherein the computer control subsystem sends an instruction to the movement controller through a serial port; the movement controller outputs a power signal of a driver through a power cable after the movement controller receives the instruction; and the driver drives the dot-matrix salient point display subsystem to finish required movement. When a contact is required to be bulged, the computer control subsystem controls an XY mobile platform of the dot-matrix salient point display subsystem to move to a corresponding position, a Z-direction driver pushes a display pin by 0.2 mm-0.5 mm upwards, and a small pawl locks the display pin; when the contact is required to be in a flat stage, a reset driver drives a base of the small pawl to move, so that the small pawl is separated from the display pin, and the display pin returns to a flat state under the action of a reset spring; and the reset driver drives the base of the small pawl to move, so that the small pawl is recovered to lock the display pin. The mechanical dot-matrix displayer can be used in braille alphabet display equipment.

Description

technical field [0001] The invention relates to a braille reading tool, in particular to an electronic display device for reading braille and graphic display. Background technique [0002] The visually impaired mainly obtain external information through sound and touch. With the advent of the information age, a large amount of information is stored in computers and networks. At present, there are few low-cost and powerful blind electronic outputs connected to computers. device. [0003] At present, there are several devices that can convert digitally stored data into Braille characters. The invention principle includes using functional materials to make micro-actuators to realize the intensive display of Braille characters. For example, US patents 4,194,190 and 4,471,190 use magnetic materials, US Patents 4,044,350; 4,283,178; 4,473,356; 4,758,165 and 4,879,698 employ piezoelectric materials, among others. There are disadvantages such as complex manufacturing process and h...

AI Technical Summary

Problems solved by technology

Taking 40 squares per line and 25 lines of braille characters as an example (one side of the braille characters has 2 dots in the horizontal direction and 3 dots in the vertical direction), according to the control method of the patent US5,496,174, 6000 switch tubes are required, so that The equipment is not only expensive, but also bulky

Taking the braille character display of the single-line piezoelectric ceramic double chip existing on the market as an example, this kind of braille character display can solve the problem of being connected to a computer; however, it is limited by the cost of the core device piezoelectric ceramic double chip and the manufacturing process , the whole device is difficult to make a portable device with multi-line output in the case of limited space

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