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Energy saving lamp box control circuit and energy saving lamp box

A technology for controlling circuits and energy-saving light boxes, applied in the electrical field, can solve the problems of wasting electric energy, the light box does not have the function of self-adaptive adjustment of brightness, etc., and achieves good effects.

Inactive Publication Date: 2012-03-28
SHENZHEN NEW SUPER BRIGHT LCD DISPLAY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an energy-saving light box for the defect that the backlight of the existing light box does not have the brightness self-adaptive adjustment function and wastes electric energy

Method used

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  • Energy saving lamp box control circuit and energy saving lamp box
  • Energy saving lamp box control circuit and energy saving lamp box
  • Energy saving lamp box control circuit and energy saving lamp box

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Embodiment Construction

[0037] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0038]In view of the problems existing in the traditional light box, the present invention conceives and realizes a brand-new multifunctional energy-saving light box with LED as the light source and its control circuit. In addition to the superior performance of LED itself over lamp tubes, this energy-saving light box also has the characteristics of adaptive dimming of ambient light in terms of application functions. Furthermore, the energy-saving light box can also have the functions of light-activated switch, voice-activated switch, and light attenuation compensation.

[0039] see figure 1 , is a block diagram of the control circuit of the energy-saving light box according to the preferred embodiment of the present invention. Such as figure...

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Abstract

The invention relates to an energy saving lamp box control circuit which comprises a PWM pulse formation module used for generating a PWM pulse signal and an LED constant current driving module which is controlled by the PWM pulse signal and drives LED operation. The control circuit also comprises an adaptive light modulation module which comprises a first light-sensitive device. The adaptive light modulation module is connected with the PWM pulse formation module and is used for sensing environment light intensity, and generating a light modulation voltage signal to control a duty ratio of the PWM pulse signal generated by the PWM pulse formation module so as to carry out light modulation. In the invention, through additionally adding the adaptive light modulation module, a lamp box has an adaptive light modulation function, the darker an environment, the brighter the lamp box, and vice versa, thus an effect of an advertisement is optimized. The control circuit also has a light control function (when ambient brightness reaches a set value, a lamp box is closed automatically), a sound control function (when ambient sound reaches a set value, the lamp box is lighted) and an LED light decay compensation function.

Description

technical field [0001] The invention relates to the electrical field, and more specifically relates to an energy-saving light box control circuit and an energy-saving light box. Background technique [0002] Light box is a form of media advertising. Although it is not as popular as dynamic advertising, it is still widely used due to its low production cost, large or small area, safe and convenient use and other characteristics. [0003] According to the different types of light sources, light boxes can be divided into earlier fluorescent tubes, EEFL (external electrode fluorescent tubes) used later, and LED (light-emitting diode) light boxes that have gradually emerged in recent years. Because LED has the characteristics of high luminous efficiency, long life, energy saving and environmental protection, and easy realization of brightness control, it can come from behind and has a great development momentum to replace traditional light sources. [0004] However, the backligh...

Claims

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Application Information

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IPC IPC(8): H05B37/02
CPCY02B20/40
Inventor 付万钧池杭磁王雪芳龚为乐
Owner SHENZHEN NEW SUPER BRIGHT LCD DISPLAY
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