Light diffusion layer and light diffusion sheet

Abstract

The invention discloses a light diffusion layer and a light diffusion sheet. The light diffusion layer contains resin and diffusion particles dispersed in the resin, wherein the proportion of the diffusion particles to the solid content of the resin is 0.05: 1 to 3: 1, and the difference between the refractive index of the diffusion particles and the refractive index of the resin is 0.05-1; the particle size of the diffusion particles is 1-30 microns; the thickness of the light diffusion layer is 20-200 microns. According to the invention, the light diffusion layer and the light diffusion sheet can convert a light source into an ideal Lambert light-emitting body, so that the influence of large-angle incident light on a signal can be effectively inhibited.

Description

technical field [0001] The invention belongs to the field of light diffusion, and in particular relates to a light diffusion layer and a light diffusion sheet. Background technique [0002] At present, the requirements for the accuracy of automatic detection and judgment of instrumentation equipment are getting higher and higher, which requires that the equipment can still receive and detect ambient light under the condition of large angle. [0003] For example, the RGBW four-channel sensor currently used, the traditional RGB sensor perceives the light intensity signal through the fitting of the three primary colors by software, and the degree of restoration cannot reach the accuracy of direct detection. Compared with the traditional RGB three-channel sensor, the RGBW four-channel sensor The addition of a white light sensing channel (W channel) enhances the sensor's detection of the light intensity signal I. Therefore, the RGBW four-channel sensor is required to effectively ...

AI Technical Summary

Problems solved by technology

[0003] For example, the RGBW four-channel sensor currently used, the traditional RGB sensor perceives the light intensity signal through the fitting of the three primary colors by software, and the degree of restoration cannot reach the accuracy of direct detection. Compared with the traditional RGB three-channel sensor, the RGBW four-channel sensor The white light sensing channel (W channel) is added to enhance the detection of the light intensity signal I by the sensor. Therefore, the RGBW four-channel sensor is required to effectively suppress noise and improve the signal-to-noise ratio (SNR) in low-light environments.

Currently commonly used diffusers have a large dependence on the angle of incident light, which cannot meet the requirements of RGBW four-channel sensors and other devices.

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