Reversal displaying device

Abstract

The invention relates to a reversal displaying device. The reversal displaying device comprises a strip-shaped displaying board body; the strip-shaped displaying board body is provided with two displaying faces, a rotary shaft which is fixedly connected with the two displaying faces separately, a motor and a controller; the displaying faces are provided with LED lamps and driving modules; the controller controls displaying of the two displaying faces separately, and when any displaying face of the two displaying faces is controlled to display and it is judged that the displaying face reaches preset conditions, the motor is controlled to drive the rotary shaft to reverse the strip-shaped displaying board body to transform the positions of the two displaying faces. When one displaying face of the strip-shaped displaying board reaches the preset conditions, the other displaying face is automatically controlled to be replaced for displaying, the displaying face which is 'tired' due to workor is in a 'sub-health state' is allowed to have a rest, the two displaying faces take turns to work for displaying, thus the normal service life of the two displaying faces is prolonged, and then through various preset conditions, the two displaying faces can have various 'rest opportunities' which conform to actual needs.

Description

technical field [0001] The invention relates to the field of LED display, in particular to a flip display device. Background technique [0002] Light-emitting diodes, referred to as LEDs for short, are made of compounds containing gallium (Ga), arsenic (As), phosphorus (P), nitrogen (N), and the like. Visible light can be radiated when electrons and holes recombine, so they can be used to make light-emitting diodes. It is used as an indicator light in circuits and instruments, or as a text or number display. Gallium arsenide diodes emit red light, gallium phosphide diodes emit green light, silicon carbide diodes emit yellow light, and gallium nitride diodes emit blue light. Due to chemical properties, it is divided into organic light-emitting diode OLED and inorganic light-emitting diode LED. [0003] The reason why LED has been widely valued and developed rapidly is inseparable from its own advantages. These advantages are summarized as follows: high brightness, low ope...

AI Technical Summary

Problems solved by technology

[0004] However, as the amount of LEDs increases, the problem of heat dissipation is more serious. The problem of heat dissipation of LEDs is now more and more valued by people. This is because the light decay or life of LEDs is directly related to its junction temperature, and the heat dissipation is not good The higher the temperature, the shorter the lifespan. According to the Arrhenius law, the lifespan will be extended by 2 times for every 10°C decrease in temperature.

It can be seen from the relationship between light decay and junction temperature released by Cree that if the junction temperature can be controlled at 65°C, the life of its LED products with light decay to 70% can be as high as 100,000 hours. The environment often cannot provide good heat dissipation conditions, resulting in the service life of LEDs often less than 20,000 hours, and the service life of some LEDs integrated with high-power LED lighting devices is even less than 5,000 hours

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