Linear dimming system based on brightness perceived by human eyes

A linearization and brightness technology, applied in the field of indoor lighting, can solve problems such as nonlinearity, eye discomfort or fatigue, and achieve uniform dimming process and high lighting efficiency

Inactive Publication Date: 2012-05-02
FUDAN UNIV
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Problems solved by technology

The perception of brightness brought by this adjustment to the human eye is often sudden and non-l

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  • Linear dimming system based on brightness perceived by human eyes
  • Linear dimming system based on brightness perceived by human eyes
  • Linear dimming system based on brightness perceived by human eyes

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[0031] The principle and process of the present invention will be described in detail below in conjunction with the accompanying drawings. According to Fechner's law, the relationship between psychological perception and physical stimulus intensity is logarithmic , where is the absolute threshold, The Weber score is a constant, and the psychological perception is , is the absolute value of the physical stimulus. Apply the above formula to vision, and then feel the brightness vs actual brightness is a logarithmic relationship. Therefore, if the actual brightness is adjusted according to the exponential curve, the perceived brightness will change linearly, such as figure 2 , image 3 shown.

[0032] According to Fechner's law, a linear dimming system can be established according to the following steps. It is composed of a photoelectric characteristic collector 1, a dimming target setter 2, a dimming curve calculation generator 3 and a dimming actuator 4, where...

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Abstract

The invention relates to a visual-ergonomics-based linear dimming system, and aims to provide a linear dimming system based on brightness perceived by human eyes. By the system, a dimming curve can be calculated according to current brightness, target brightness and dimming time. A linear dimming principle is based on research results of visual ergonomics and psychophysics, namely the perceived brightness and actual brightness are logarithmically changed. A corresponding relationship among a dimming electrical parameter, the actual brightness and the perceived brightness is established, the variation curve of the electrical parameter is calculated by taking the linear variation of the perceived brightness as a target and according to the parameter setting of a user and then linear dimming is realized by directly controlling the electrical parameter according to the curve vibration. By the system, the perceived brightness can be linearly changed along with time in a dimming process which is more uniform and softer. The system can be used in places such as cabins and the like with relatively higher illumination requirements and in the field of indoor illumination.

Description

technical field [0001] The invention relates to a linear dimming system based on perceived brightness, which can be applied to occasions with high lighting requirements such as engine cabins and the field of indoor lighting. Background technique [0002] Vision is one of the most important senses of the human body. With the advancement of science and technology and the improvement of people's living standards, people's requirements for lighting have gradually increased from the single focus on illuminance in the past to focus on illuminance, comfort, efficiency, and non-biological safety effects. comprehensive factors. [0003] Poor lighting conditions can make the human eye less adaptable. If the lighting system cannot be effectively controlled and adjusted, it will easily cause visual fatigue and even cause serious consequences. The study of visual ergonomics shows that in addition to providing the light environment required to meet the user's functional visual tasks, li...

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Application Information

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IPC IPC(8): H05B37/02
CPCY02B20/42Y02B20/40
Inventor 孙耀杰林燕丹王玮童立青苏晓萌
Owner FUDAN UNIV
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