Lg Display Co., Ltd.

Korea Advanced Institute of Science and Technology

Silicon Works Co., Ltd.

Woo Suk Ha

Mun Churl Kim

Yong Woo Kim

Dae Eun Kim

Sang Yeon Kim

The present invention provides a technology that separates a low-contrast-ratio image into sublayer images, classifies each sublayer image into several categories in accordance with the characteristics of each sublayer image, and learns a transformation matrix representing a relationship between the low-contrast-ratio image and a high-contrast-ratio image for each category. In addition, the present invention provides a technology that separates an input low-contrast-ratio image into sublayer images, selects a category corresponding to each sublayer image, and applies a learned transformation matrix to generate a high.

Inverse tone mapping method

This invention relates to a liquid crystal display device that minimizes picture quality deterioration caused by signal distortion. The present invention selects an area within an image, which has a rapidly increasing or decreasing gamma voltage, identifies a border delineating two different intensity regions within the area, computes an average intensity within the area, and weights the gamma voltage for each pixel within the area based on the average intensity. A liquid crystal display device according to the present invention includes: a liquid crystal display panel; an analyzer analyzing a brightness characteristic of data in an area within an image; an average video signal voltage generator calculating an average brightness value in the area; a bordering value processing part calculating a bordering brightness value in the area; and a weighting part adjusting a pixel voltage according to the average brightness value and the bordering brightness value.

Liquid crystal display apparatus and driving method thereof

Growing community of inventors

Yongin-si, South Korea

Woo Suk Ha