Device and method for controlling light source in gradual brightness change manner
A light source control and brightness technology, applied in the direction of light sources, electric light sources, lighting devices, etc., can solve the problems of easily damaged lamps and affecting human eye health, and achieve the effects of reducing stimulation, stabilizing brightness, and protecting health
Active Publication Date: 2015-02-18
TAIZHOU LG ELECTRONICS REFRIGERATOR CO LTD
View PDF5 Cites 0 Cited by
- Summary
- 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 overcome the defects of the prior art that the light source brightens instantly, thereby affecting the health of the human eye and easily damaging the lamps, and provides a control device and method for a light source with gradually changing brightness. By making the light source slowly brighten or dimming, reducing eye irritation and extending lamp life
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0044] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to describe the technical solution of the present invention in detail.
[0045] 1. Embodiment of the light source control device with slow brightness change
[0046] figure 1Shown is a block diagram of the circuit structure of the brightness slowly changing light source control device of the present invention, wherein said brightness slowly changing light source control device includes a MCU1 (microcontroller), a light source driving unit 2, a light source 3, and a switch unit 4 , a brightness detection unit 5 , a first filter 7 and a second filter 8 .
[0047] Wherein the MCU1 is used to detect the switching action of the switch unit 4 and whether the light source 3 is turned on, calculate the duty ratio of the pulse and output the pulse to the light source drive unit 2, and detect the time length of the drive pulse output, and store The driving pulse duty...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a device and a method for controlling a light source in a gradual brightness change manner. The device for controlling the light source in the gradual brightness change manner comprises a light source, a light source driving unit, a switch unit, and an MCU (Microgrammed Control Unit), wherein the MCU is used for detecting a switching action of the switch unit and whether the light source is turned on, calculating the duty cycle of drive pulses, outputting the drive pulses to the light source driving unit, detecting the time span for outputting the drive pulses, and storing the duty cycle of the drive pulses, the variation step length of the duty cycles of the drive pulses, the duty cycle of the maximum drive pulse, the duty cycle of the minimum drive pulse and the variation time period of the duty cycle of the drive pulse. According to the invention, According to the invention, the gradual lighting of gradual dimming of a lamp is realized by controlling the duty cycle of the drive pulses of the drive light source, so that the service life of the lamp is prolonged, in addition, by addition of a brightness detection unit, the brightness of the light source is regulated based on ambient brightness, so that the brightness sensed by human eyes is stabilized, and the stimulations to the human eyes are reduced and the health of the human eyes is protected.
Description
technical field [0001] The invention relates to a control device and method for a light source with gradual brightness change, in particular to a control device and method for an LED light source with gradual brightness change. Background technique [0002] Today, with the continuous emergence of household lamps, businesses have launched "soft lights" and "comfortable lights" in order to enable users to obtain more comfortable and soft lights. However, no matter whether it is a soft light or an ordinary fluorescent lamp, the brightness of the lamp reaches the maximum brightness at the moment the switch is pressed, and the lamp goes out instantaneously when the switch is turned off. This sudden change in brightness makes it difficult for human eyes to adapt, and in severe cases, it may even cause dizziness. [0003] Moreover, when the existing household lamps are turned on each time, strong currents will repeatedly impact the lamps, thereby reducing the service life of the l...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
CPCY02B20/42Y02B20/40
Inventor 夏必聪季正飞
Owner TAIZHOU LG ELECTRONICS REFRIGERATOR CO LTD