Backlight module lens and backlight module lens comprising backlight module lens

Abstract

The invention discloses a backlight module lens. The lens comprises a substrate having a cubic structure as a whole; the substrate comprises a square bottom surface, a square top surface and a side surface, wherein a center of the bottom surface is recessed upward to form a light incident surface; the top surface upwardly bulges in order to form a main light-emitting surface, and the main light exiting surface comprises four free curved surfaces, and the four free curved surfaces have a combined center point and are symmetric about the center of the combined center point; and the combined center point is downward recessed toward to the light incident surface and is on the same center line as the center point of the light-incident surface, wherein the bottom surface of the substrate has a size smaller than the top surface size such that the side surface is inclined toward the inner side by an angle theta 1 to form an auxiliary light-emitting surface. The backlight module lens can outputa square spot with clear edges, and can achieve uniform illumination distribution in the projection area, and the overall illumination effect is excellent when combined into an array.

Description

technical field [0001] The invention relates to an optical lens for converting a point light source into a surface light source, which is suitable for general lighting, especially the technical field of backlight. Background technique [0002] With the development of large-size LCD TV technology, the backlight of LCD TV requires a large number of LEDs to be arranged in an array to illuminate the LCD panel. A lens is arranged in front of each LED chip, and the light from the LED is reconverted through the lens. Light distribution to reduce the thickness of the backlight module and the amount of LED used, while meeting the requirements of brightness and uniformity of the LCD backlight. Currently on the market, most of the LED lenses on the market have a circular outline in the top view projection of the optical structure, and the shape of the optical structure is mostly in the form of rotational symmetry. TV displays are generally square, and it would be more reasonable to us...

AI Technical Summary

Problems solved by technology

Taking a 75-inch panel as an example, the pixel density of the 4K panel is only 59ppi. If it is increased to 8K, the PPI can be increased to more than 110, and the fineness of the display screen will be greatly improved.

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