The rotating type electric sign board and method for driving thereof

Abstract

A rotary electronic display board and a method for driving the same. The rotary electronic display board switches individual LEDs on or off at their correct positions irrespective of a variation in rotation speed of a drive motor, and correctly and sharply indicates text and image data without using a high-priced encoder, such that it can reduce its own production cost and increase the price competitiveness of a product. The rotary electronic display board includes: a drive motor for rotating a rotary shaft at a predetermined speed; a revolution solid connected to the rotary shaft, which rotates with a predetermined turning radius; an LED array arranged on the revolution solid; an origin pulse generator for generating an origin pulse whenever the revolution solid rotates once; a line pulse generator for calculating a rotation period of the revolution solid using the origin pulse, and generating a plurality of line pulses each having a period corresponding to a division result value which is acquired by dividing the rotation period of the revolution solid by the number of virtual areas separated along the turning radius of the revolution solid; and a controller for generating a control signal to selectively switch on or off the LED array so that desired text and image data is displayed at each line pulse generation time.

Description

technical field [0001] The present invention relates to an electronic display board (also known as an electronic signage board), and more particularly to a method for displaying text and image data more clearly and significantly reducing product manufacturing costs by selectively turning on or off LED (Light Emitting Diode) arrays. A rotary electronic display panel and a method for driving the electronic display panel. Background technique [0002] Generally, electronic display boards are used to display images or text information. Recently, various electronic display panels composed of optical fibers, LEDs, LCDs, etc. have been proposed. In particular, due to the wide application of large-scale high-brightness and multi-color LEDs, various electronic display boards have been commercially developed, such as large-size electronic display boards, subway-guided electronic display boards, and other electronic display boards for advertising. display board and more. [0003] Ho...

AI Technical Summary

Problems solved by technology

[0011] However, the aforementioned conventional rotary electronic display panel has the disadvantage that required text or image data cannot be correctly displayed due to the non-constant rotational speed of the driving motor, so a driving motor controller is required to maintain a constant rotational speed of the driving motor, thereby resulting in increased cost and increased size of the electronic display board

Also, another rotary electronic display panel using an encoder including a disc and a photocoupler is very expensive, thereby inevitably increasing the manufacturing cost and reducing the price competitiveness of the product in the market

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