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Luminous efficacy is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power, measured in lumens per watt in the International System of Units (SI). Depending on context, the power can be either the radiant flux of the source's output, or it can be the total power (electric power, chemical energy, or others) consumed by the source. Which sense of the term is intended must usually be inferred from the context, and is sometimes unclear. The former sense is sometimes called luminous efficacy of radiation, and the latter luminous efficacy of a source or overall luminous efficacy.

Backlight system containing free-form surface reflector

ActiveCN101782203AUniform illuminationReduce thicknessPoint-like light sourceLighting device detailsIlluminanceFree form

The invention relates to a backlight system containing a free-form surface reflector. The backlight system comprises light sources (1) and a backlight cavity (3), wherein the bottom of the backlight cavity (3) is a free-form surface reflecting plane (2) with high reflectivity, the backlight cavity (3) is formed by a side wall, the bottom free-form surface reflecting plane (2) and a diffusion barrier (5) arranged on the top of the backlight cavity (3), a brightness enhancement film and other optical film layers and a LCD panel are arranged on the diffusion barrier (5); the light sources (1) are arranged on the bottom of the backlight cavity (3), positioned in line and installed on the axis of the free-form surface reflecting plane (2); and a transflective optic plate (4) is arranged just above the light sources (1) in the backlight cavity (3). The backlight system of the invention has the advantages that the illuminance is uniform, the overall thickness of the system is thin, the luminous efficacy is high, and the system has the advantage of being convenient to install and cool.

Backlight system containing free-form surface reflector

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Owner:GUANGDONG REAL FAITH LIGHTING TECH

1 results about "Luminous efficacy" patented technology

Backlight system containing free-form surface reflector

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