Hong Kong Applied Science and Technology Research Institute Company, Limited

Chen-Jung Tsai

Ying Liu

Wei Zhang

Huajun Peng

Danding Huang

Shou Lung Chen

Chun-Kit Hung

An image display device is presented to solve problems of high power consumption, insufficient contrast, image flicker, and distortion of image display devices. The image display device includes an image display management module which includes a backlight control unit. The backlight control unit includes an image brightness analyzer, generating a brightness value according to an input image data; a weight generator, generating a weight according to the brightness value; an image variation analyzer, analyzing the input image data to generate an image variance; and a backlight factor generator, coupled to the weight generator and the image variation analyzer to generate a backlight adjusting signal according to the weight and the image variance. By the backlight adjusting signal, the image display device achieves the power-saving and contrast enhancement effects.

Image display device and method

A method of increasing the dynamic range of an image comprising a plurality of pixels each having a luminance value within a first luminance dynamic range. The method includes determining a background luminance value for each pixel of the image and determining a minimum and a maximum of the background luminance values. A conversion factor is then determined for each pixel of the image based on the minimum and maximum of the background luminance values. The image id converted from the first luminance dynamic range to a second luminance dynamic range by multiplying the luminance value of each pixel of the image by its conversion factor.

Method of displaying a low dynamic range image in a high dynamic range

The present invention discloses a coupling lens system, which comprises a collimation lens for collimating light from light source to a first direction; a first lens surface for total internal reflecting light from light source to the first direction; and a second lens surface for total internal reflecting light from the first direction to a second direction. Wherein an angle between the first direction and the second direction can be larger than, smaller than or equal to 90 degrees, and preferably between 70 to 100 degrees. Additionally, the system further comprises at least one extra surface parallel to the second lens surface, wherein at least one extra surface has a length L and is parallel to each other. At the same time, each surface and another surface has a distance D in between, and the length L can be equaled to or larger than the distance D according to purposes and further modifies a shape of the coupling lens system.

Total internal reflection side emitting coupling device

A light guiding strip and a backlight module and display using the same are provided. The light guiding strip of the present invention includes a plurality of light reflecting surfaces and a plurality of light emergent surfaces. Each of the light reflecting surfaces has a light diffusion pattern. The light guiding strip of the present invention has the advantages of light weight, wide LED pitch, low cost, thickness and so on.

Light guiding strip and backlight module and display using the same

A light-emitting assembly for conditioning the light output of at least one light-emitting source for light guide coupling, comprising a lens and at least one light-emitting source, the light-emitting source having an optical output axis and the lens comprising a beam diverging portion for diverging or spreading light about the output axis, wherein the beam diverging portion of the lens is along the optical output axis and forward of the light-emitting source, and at least one beam converging portion for converging or compressing light away from the optical axis is adjacent the beam diverging portion.

Growing community of inventors

Hong Kong, China

Chen-Jung Tsai