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Luminance self-adjusting projector and method thereof

An automatic adjustment and projector technology, applied in the field of projectors, can solve the problems of high noise, inability to meet various use occasions, and reducing the brightness of the projector.

Inactive Publication Date: 2007-07-04
LENOVO (BEIJING) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For a projector, the higher the brightness of the projector bulb, the greater the heat generated inside and the higher the temperature. At the same time, in order to enhance the heat dissipation effect, the fan speed in the projector also increases and the noise becomes louder. Affect the life of the projector
[0005] In the method of manually adjusting the brightness of the projector, the essence is to adjust the brightness of the image displayed by the projector by controlling the image signal strength of the projector, and the brightness of the projector bulb is not adjusted. The power has not changed, but the energy leaving the projector body in the form of light energy has decreased, but the energy remaining in the projector body has increased, which will further affect the life of the projector
[0006] At present, such a projector has appeared, and two working modes are set on this projector, that is, the normal mode and the energy-saving mode, and the brightness of the projector is reduced by reducing the power of the projector bulb. Two working states are set for the lamp. Although the problem of heat accumulation in the projector is solved to a certain extent, it cannot meet various usage occasions. Moreover, this kind of projector needs to be adjusted manually. Adjustment is not accurate enough

Method used

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  • Luminance self-adjusting projector and method thereof
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  • Luminance self-adjusting projector and method thereof

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Embodiment Construction

[0025] There is a fixed correspondence between the contrast ratio of the projector, the ambient brightness, and the projection brightness of the projector. When the output brightness of the projector remains unchanged, if the ambient brightness increases, the contrast ratio of the projector projection will decrease, which will affect the projection effect. Therefore, only by increasing the brightness of the projection can the contrast of the projection be properly improved; when the ambient brightness is low, the projector does not need a high brightness to obtain a more suitable contrast. At this time, it is necessary to reduce the brightness of the projector.

[0026] The present invention obtains satisfactory contrast through the flexible adjustment of the brightness of the projector.

[0027] The present invention will be further described below in conjunction with the accompanying drawings of the description.

[0028] As shown in Figure 1 of the specification, the project...

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Abstract

The invention discloses a projector that can auto adjust the brightness and a method for adjusting the brightness automatically, said system includes center control module, lamp bulb of projector, display drive module, optical system, detection module and bulb power control module; the detection module is used to detect the parameters of the projecting image data; said center control module calculate the brightness of projector according to the parameters of the projecting image data; and said bulb power control module adjust the output power of bulb according to the brightness calculated by the center control module. Said method is: the projector detects the parameters of projecting images; the brightness of projector is calculated according to the parameters by the projector; and the projector projects according to the brightness.

Description

technical field [0001] The invention relates to a projector, in particular to a projector capable of automatically adjusting brightness and a method for automatically adjusting brightness of the projector. Background technique [0002] With the development of science and technology, various new electronic devices are applied to production and life. As a large-scale display output device, projectors are widely used in teaching, conferences, and home theaters. [0003] The performance of the projector is mainly reflected in its brightness index. In order to adapt to the change of the brightness of the projection environment, the projector has a brightness adjustment function, and the best projection effect can be obtained by manually adjusting the brightness of the projector. [0004] For a projector, the higher the brightness of the projector bulb, the greater the heat generated inside and the higher the temperature. At the same time, in order to enhance the heat dissipation ...

Claims

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Application Information

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IPC IPC(8): G03B21/20G03B21/00H05B39/04
CPCY02B20/14Y02B20/00
Inventor 王振华
Owner LENOVO (BEIJING) CO LTD
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