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Utilization method of automatic luminance adjustment type projecting device

A projection device and automatic adjustment technology, applied in the field of projection, can solve problems such as inconvenience and achieve low cost

Inactive Publication Date: 2018-09-28
CHENGDU YATUSHIJIE CULTURAL COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the brightness generated by the light source of the projection device requires the user to manually adjust the brightness by touching the button according to the actual situation, which is very inconvenient

Method used

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  • Utilization method of automatic luminance adjustment type projecting device

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Embodiment Construction

[0014] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0015] Such as figure 1 As shown, a method for using a projection device with automatic brightness adjustment includes a power conversion circuit, a brightness detection control circuit, and a brightness adjustment circuit. The output end of the power conversion circuit is connected to the brightness detection control circuit, and the brightness detection control circuit The output terminal is connected to the brightness adjustment circuit;

[0016] The power conversion circuit includes a power plug P1, a transformer, a full-bridge rectifier circuit, a resistor R1 and a Zener diode DW, wherein the power plug P1 inputs 220V mains, and the L and N ends of the power plug P1 are respectively connected to two terminals of the transformer. The i...

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Abstract

The invention discloses a utilization method of an automatic luminance adjustment type projecting device. The device comprises a power switching circuit, a luminance detection control circuit and a luminance adjusting circuit. An output end of the power switching circuit is connected with the luminance detection control circuit, and an output end of the luminance detection control circuit is connected with the luminance adjusting circuit. The power switching circuit comprises a power plug P1, a transformer, a full bridge rectifier, a resistor R1 and a voltage-stabilizing diode DW. The luminance adjusting circuit comprises a resistor R2, a resistor R3, a resistor R4, a resistor R5, a triode Q1 and a photosensitive resistor RL. The luminance adjusting circuit comprises a first light source L1s, a second light source L2s, a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a triode Q2 and a triode Q3. By a superimposed current and superimposed light source controlmode, detection of light sources around the projecting device is realized, luminance of the light sources generated by the projection device can be controlled automatically, and low cost is realized.

Description

technical field [0001] The invention relates to the field of projection, in particular to a method for using a projection device with automatic brightness adjustment. Background technique [0002] Projection device (also known as projector) is an optical amplifier developed on the basis of slide projector, which is composed of power supply, light source, optical part, cooling fan, dimmer, chassis, other additional devices and other parts. Physical reflection projectors and micro projectors are also a kind of projectors, which use optical principles to enlarge and project the lecture objects on the screen through the optical system, so as to achieve the purpose of expanding communication, clear demonstration, and strengthening understanding. In the prior art, the brightness generated by the light source of the projection device requires the user to manually adjust the brightness by touching a button according to the actual situation, which is very inconvenient. Contents of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00
CPCG09G3/001G09G2320/0626
Inventor 孙子昂
Owner CHENGDU YATUSHIJIE CULTURAL COMM CO LTD
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