Controller for inhibiting display screen temperature

Abstract

The controller for inhibiting the temperature of display screen is used to maintain the environment temperature of the display screen in the preset temperature level and to avoid the display screen operating in abnormal temperature so as to ensure the service life. The control unit of the present invention is connected to one temperature sensing unit to detect the environment temperature and to output one temperature signal to the control unit, and compares the temperature signal and the preset value to determine the drive voltage to the cold cathode tube, so as to make the display screen operate in optimal environment temperature.

Description

technical field [0001] The invention relates to a control device for suppressing the temperature of a display screen, in particular to a control device for normally maintaining the display screen at a normal ambient temperature for operation. Background technique [0002] The light source required by the liquid crystal display (LCD) used in commercially available desktop and notebook computers, PDAs, and Webpads all uses a driving device to drive a high-voltage cold-cathode fluorescent lamp (CCFL), so that the light is projected to the backlight. In this way, the user can clearly see the displayed picture. [0003] In addition, most of the drive devices for cold cathode fluorescent lamps are currently required to be able to stabilize the brightness of the lamps on average. [0004] In Taiwan Patent Publication No. 383122, Japanese Patent Publication No. 09-102397, No. 2000-150191, No. 2000-292775, No. 2004-69907, No. 2004-39336, No. 2000-243586, No. 2000- Documents such as...

AI Technical Summary

Problems solved by technology

[0005] However, the most difficult problem of the display screen is that the light-emitting area of ​​the cold-cathode lamp is a closed space, and there is no good technology to dissipate the heat energy generated. In order to achieve the average brightness of the cold-cathode lamp, it is often necessary to It is necessary to increase the driving voltage and current, which will further increase the heat (for example, the brightness must be increased outdoors). In addition, if the display is placed in a place with a high ambient temperature, such as a living room exposed to sunlight, etc., It is also easy to cause the ambient temperature of the overall display screen to be overloaded, which will affect the service life of all electronic parts and liquid crystal display panels, cause damage to the cold cathode lamp tube, and the resin uniform light plate is easy to deteriorate due to high temperature and cause yellowing, etc. Cold-cathode lamps and uniform light panels are the most important components of the display screen. Once damaged, it is extremely difficult to replace them. Therefore, most consumers are forced to replace the entire display screen, which is not conducive to the service life and economic benefits of the display screen.

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