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Light source control method for back projection TV

A light source control and TV technology, applied to color TV parts, TV system parts, TVs, etc., can solve the problem of long time and achieve the effect of reducing power consumption and time required

Inactive Publication Date: 2005-09-14
LEIJIN ELECTRONIC SHENYANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, as the above-mentioned control process of the traditional LCD rear-projection TV light source is due to the fact that when the power is introduced, the light source is introduced into the power supply to drive after the machine is set in a fully cooled state, so there is time required to display the LCD rear-projection TV image. the long question

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  • Light source control method for back projection TV
  • Light source control method for back projection TV
  • Light source control method for back projection TV

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Embodiment Construction

[0016] A typical example of the light source control method of the rear-projection television of the present invention having the above-mentioned features will be described in detail as follows with reference to the drawings.

[0017] image 3 It is a block diagram of the execution device for the light source control method of the rear projection TV of the present invention, which is composed of the following structure: a control unit 10 that performs comprehensive control on the control signals output by each unit; the control received from the control unit 10 drives the above-mentioned light source 30 and after checking whether the drive is checked, the light source detection (TETECT) signal is output to the safety device 20 of the control unit 10; during the control signal received from the above-mentioned control unit 10 to maintain the power-on state, in order to make the cooling fan 50 continue to drive the light source , a cooling fan power supply unit 60 that supplies ...

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Abstract

This invention discloses a light source control method for a rear projection TV, which can reduce the light source drive time when driving LCD rear projection TV so as to display broadcast signals from outside quickly. It is composed of the following steps: a storage step storing said rear projection TV closing time information in above mentioned storage, a computing stage computing time difference value Ts=A2-A1 of input broadcast signals time information A2 and the time information stored in the storage part, comparing the above time difference Ts and the machine set time T1, if T1 is greater than Ts, then the above mentioned light source is cooled to form the drive stage in said difference period T1-Ts, which not only reduces time necessary for displaying image but also reduces unnecessary power consumption.

Description

technical field [0001] The invention relates to a rear-projection television, in particular to a method for controlling a light source of a rear-projection television. When driving an LCD rear-projection television, the driving time of the light source can be shortened, thereby quickly displaying broadcast signals input from the outside. Background technique [0002] Generally, LCD (Liquid Crystal Display) (Liquid Crystal Display) rear-projection TVs, LCD projectors, etc., as projection displays using light sources, mostly use metal halide (Metal Halide) system light sources, because metal halide system lamps A light source whose lifetime or light spectrum characteristics are good. [0003] figure 1 It is a block diagram of the relevant parts of traditional LCD rear projection TV and light source control; The signal drives the above-mentioned light source 30, and after checking whether it is driven, the light source detection (TETECT) signal is output to the safety device ...

Claims

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Application Information

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IPC IPC(8): H04N5/74
Inventor 金东烨
Owner LEIJIN ELECTRONIC SHENYANG CO LTD
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