Automatic dimming table lamp

A technology for automatic dimming and table lamps, which is applied in the direction of light source, electric light source, electric lamp circuit layout, etc. It can solve the problems of affecting students' eyesight, how difficult to adjust the brightness of table lamps, and the inability to automatically adjust the brightness of lights, etc., so as to protect eyesight, Stabilize light brightness and reduce troublesome effects

Inactive Publication Date: 2012-11-28
刘昭利
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The dimmable desk lamps commonly used in the market have an obvious shortcoming when reading and studying, namely: the brightness of the desk lamp can only be adjusted manually, and it is not easy to control the brightness of the desk lamp. Especially for students, the light is too strong or too bright. Weakness will affect the students' eyesight, and the desk lamp itself cannot automatically adjust the brightness of the light as the brightness of the surrounding environment changes.

Method used

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  • Automatic dimming table lamp

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Embodiment Construction

[0016] According to attached figure 1 The present invention can be realized by implementing the working principle diagram of the circuit of the automatic dimming desk lamp and the description of the drawings and the technical requirements of the components described below.

[0017] Selection of components and their technical parameters

[0018] D1~D4 are silicon rectifier diodes, choose 4 silicon rectifier diodes of model IN4007;

[0019] DW is a Zener diode, and the selected technical parameters are 9V, 1W Zener diodes of any type;

[0020] All resistors are 1 / 4W metal film resistors, the resistance value of resistor R1 is 30kΩ, the resistance value of resistor R2 is 2kΩ, the resistance value of resistor R3 is 100kΩ, and the resistance value of resistor R4 is 100Ω;

[0021] The power of the trimmer potentiometer RP is 1W, and its resistance is 47kΩ;

[0022] RG is a photoresistor, the selected model is MG45;

[0023] Capacitor C1 is a polyester capacitor with a capacity o...

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Abstract

The invention provides an automatic dimming table lamp. The automatic dimming table lamp is composed of a 220V alternating current power supply, a full-bridge rectifying circuit, a 9V voltage stabilizing circuit, a light-sensitive circuit, an optical signal amplification circuit, a bidirectional thyristor trigger circuit and a bidirectional thyristor control circuit, and is characterized in that the type of a unijunction transistor VT2 in the bidirectional thyristor trigger circuit is BT33. According to the automatic dimming table lamp provided by the invention, a light-sensitive resistor is placed in a proper position of a table lamp, and the intensity of illumination around the table lamp can be automatically adjusted to a proper value, thereby reducing the trouble of manual dimming and protecting the eyesight of students. Simultaneously, the automatic dimming table lamp also has a function of stabilizing the light brightness, thus when 220V alternating voltage fluctuates, the brightness of the table lamp is kept unchanged. The brightness of the dimming table lamp can be changed by only changing the distance between the light-sensitive resistor and the bulb of the table lamp, thereby being very convenient to use. The automatic dimming table lamp is suitable for factories to develop a novel table lamp with a function of automatically controlling illumination.

Description

technical field [0001] The invention belongs to the field of electronic technology application and lighting technology, and relates to an automatic dimming desk lamp. Background technique [0002] The dimmable desk lamps commonly used in the market have an obvious shortcoming when reading and studying, namely: the brightness of the desk lamp can only be adjusted manually, and it is not easy to control the brightness of the desk lamp. Especially for students, the light is too strong or too bright. Weakness will affect the students' eyesight, and the desk lamp itself cannot automatically adjust the brightness of the light as the brightness of the surrounding environment changes. The invention is an automatic dimming desk lamp, which consists of a photoresistor placed in a proper position of the desk lamp, and the illuminance around the desk lamp can be automatically adjusted to a suitable value, which can reduce the trouble of manual dimming and protect the eyesight of student...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 刘昭利
Owner 刘昭利
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