Lg Display Co., Ltd.

Byoungchul Cho

Changkyun Park

Daeho Cho

Kyungjoon Kwon

HeeJung Hong

NamYong Gong

Heewon Ahn

Sangjae Park

Junghwan Lee

Seonggyun Kim

Homin Jeon

Jiwon Lee

Juneung Kim

Sihoon Lee

Embodiments of the present disclosure relate to a data driving circuit and a display device. In the process of a display device converting an image data received from an outside into a data signal supplied to a data driving circuit, a final color temperature target represented by the image is variably set based on a panel driving current, so that the power consumption of a display panel displaying an image can be minimized. In addition, since the final color temperature target is varied, the luminance of the image and the user's recognition level are maintained constant, thereby improving the efficiency of the display device.

Data driving circuit and display device

A display device and driving method thereof are provided. The display device comprises a display panel and a color compensation part. The display panel comprises a display area which has a flat portion and a bending portion. The color compensation part compensates for input data signals by applying data gains which are set differently for the flat portion and the bending portion.

Display device and driving method thereof

A local dimming method and a liquid crystal display using the same are provided. The local dimming method includes segmenting an input image into N&#xd7;M (where N and M are positive integer greater than n) blocks; determining representative values of the blocks, which define average luminance of the respective blocks; analyzing the input image; setting a spatial filter mask having a size of n&#xd7;n (where n is a positive integer greater than 3 and equal to or smaller than 10), increasing the number of coefficients greater than 0 in the spatial filter mask when the input image is determined as a dark image, and decreasing the number of coefficients greater than 0 in the spatial filter mask when the input image is determined as a bright image; and multiplying the block representative values by coefficients of the spatial filter mask to determine a dimming value for each block.

Local dimming method and liquid crystal display

An image processing method and apparatus using the image processing method are provided. The apparatus comprises a processor configured to scale color values of input image data, thereby simulating the optical characteristics of paper. The simulation takes into consideration varying ambient light conditions around the display to imitate the optical characteristics of physical paper in the same ambient light conditions.

Image processing method for display apparatus and image processing apparatus

A display apparatus includes a liquid crystal display (LCD) panel and a backlight coupled to the LCD panel. The LCD apparatus is capable of being operated in a plurality of modes. The gradation values of the image data is adjusted in accordance with gradation ranges, each gradation range having an upper limit gradation value and a lower limit gradation value. The first converted image data is then scaled by applying a scaling factor, followed by adjustment of backlight brightness. The frame rate of the LCD apparatus is also adjusted to implement the operation mode.

Display apparatus and display apparatus control method

There are provided an electronic device and a display controlling apparatus and method. The display controlling apparatus that is driven in a paper mode and includes a backlight includes an image processing device that first converts a gradation value of an input image so as to have image characteristics of the paper mode, and second converts the first converted gradation value of the input image so as to have a upper limit gradation value is scaled up to the maximum gradation value, and a backlight brightness determining unit that determines brightness of light irradiated by the backlight to be lowered in response to the second conversion of the gradation value.

Electronic device, display controlling apparatus and method thereof

A liquid crystal display includes a liquid crystal display panel, a backlight unit including a plurality of light sources, the backlight unit providing light to a back surface of the liquid crystal display panel, a backlight driving circuit that individually drives a plurality of previously determined blocks each including the light sources based on a dimming value of each of the blocks, and a local dimming control circuit that calculates a pixel gain value compensating for a luminance reduction resulting from the dimming value of each block and corrects the pixel gain value based on a grayscale saturation level of each block.

Liquid crystal display and local dimming control method thereof

An error diffusion method includes: simultaneously receiving first to nth (n is a positive integer of 2 or larger) pixel data at every clock; adding a quantization error stored in a memory to each of the first to (n&#x2212;1)th pixel data and quantizing them into data having a smaller number of bits than the number of input bits; adding the quantization error stored in the memory to the nth pixel data and quantizing it into data having a smaller number of bits than the number of input bits; diffusing the quantization errors of the first to (n&#x2212;1)th pixel data to nearby pixels excluding the first to nth pixels by using a first error diffusion mask, and storing the diffusion results of the quantization errors of the first to (n&#x2212;1)th pixel data in the memory; and diffusing the quantization error of the nth pixel data to pixels around the nth pixel by using a second error diffusion mask, and storing the diffusion results of the quantization error of the nth pixel data in the memory.

Error diffusion method and liquid crystal display using the same

A multiviewable stereoscopic image display device and a method for driving the same are provided. The stereoscopic image display device includes: a display panel that displays a 2D image in the 2D mode and displays a 3D image in the 3D mode; a control unit that receives first to m-th image data (m is a natural number greater than 2), and in the 3D mode time-divides and sequentially outputs the left-eye image data of each of the first to m-th image data, and then time-divides and sequentially outputs the right-eye image data of each of the first to m-th image data; and first to m-th liquid crystal shutter glasses that open and close the left-eye shutter and the right-eye shutter in synchronization with each of the first to m-th liquid crystal shutter glass control signals generated from the control unit.

Multiviewable stereoscopic image display device and method for driving the same

An image processing unit, a stereoscopic image display using the same, and an image processing method are disclosed. The image processing unit includes a data modulation unit, that receives 3D image data including left eye image data and right eye image data, compares a pixel data of the left eye image and a pixel data of the right eye image corresponding to the same coordinate of the previously set mask with each other, calculates the number of cases where a difference between the same pixel data of the left eye image data and the right eye image data is equal to or greater than a predetermined threshold value, and modulates the pixel data of the left eye image and the pixel data of the right eye image inside the mask using a first coefficient group of the mask when the number of cases is greater than a predetermined value.

Image processing unit, stereoscopic image display using the same, and image processing method

A liquid crystal display and a local dimming control method thereof are discussed. The liquid crystal display includes a liquid crystal display panel selectively displaying a 2D image and a 3D image in response to a mode signal, a backlight unit including a plurality of light sources, a backlight driving circuit individually driving a plurality of previously determined blocks each including the light sources based on a dimming value of each block, and a local dimming control circuit, that calculates a pixel gain value based on a dimming value of each block in a first frame, applies the pixel gain value to a data compensation for a second frame, which is arranged later than the first frame, and varies a time point when the pixel gain value for the data compensation is applied in response to the mode signal.

A stereoscopic image display includes a display panel, which displays a left eye image on odd-numbered lines and displays a right eye image on even-numbered lines, a patterned retarder including a first retarder passing through first polarized light of the left eye image and a second retarder passing through second polarized light of the right eye image, polarized glasses including a left eye polarizing filter and a right eye polarizing filter, and a 3D formatter, which receives 3D image data from a host system, assigns left eye image data of the 3D image data to the odd-numbered lines, and assign right eye image data of the 3D image data to the even-numbered lines.

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Seoul, South Korea

Byoungchul Cho