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Huajun Peng
Huajun Peng, Hong Kong CN
| Patent application number | Description | Published |
|---|---|---|
| 20080238336 | Back-Light Devices and Displays Incorporating Same - A back-light arrangement for providing back-light to a display panel such as a liquid crystal video display panel, includes a plurality of light emitting devices arranged and distributed for providing back-light to the display panel, and electronic circuitry arranged for driving the plurality of light emitting devices to produce the back-light. The electronic circuitry contains a plurality of drivers, each of which is arranged to individually drive a corresponding one of the plurality of light emitting devices to emit light upon receipt of an actuating signal. A controller is arranged to multiplex an intensity signal to each one of the plurality of drivers for individually driving each one of the plurality of light emitting devices. | 10-02-2008 |
| 20080297460 | Method of displaying a low dynamic range image in a high dynamic range - 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. | 12-04-2008 |
| 20090122001 | Method and apparatus for image display with backlight illumination - An LCD display apparatus arranged to display image on an image display surface at an image frame rate of M image frames per second, the apparatus including a backlight arrangement comprising an LED backlight device for providing backlight illumination to said image display surface and a backlight controller for controlling the generation of backlight and intensity distribution of backlight illumination on said image display surface; wherein the backlight controller comprises a processor configured to generate a set of backlight illumination data with reference to the intensity distribution characteristics of the image content of said image frame according to a predetermined relationship, wherein said set of backlight illumination data contains information on the required intensity distribution of backlight on said image display surface for said image frame; and to generate a plurality of backlight illumination frames for each said image frame during the duration of said image frame based on said set of backlight illumination data; wherein the intensity aggregate of said plurality of backlight illumination frames generated during the duration of said image frame is equivalent to the required intensity distribution of backlight on said image display surface for said image frame. | 05-14-2009 |
| 20100046852 | Digital Image Enhancement - Enhancement of an image includes adjusting its brightness and then adjusting the contrast of the brightness adjusted image. Adjusting the brightness uses an estimation of real world luminance. Contrast adjustment involves extracting background and contrast information, adjusting the contrast information by an adjustment factor based on the background information and combining the background corrected contrast information to obtain an output image. | 02-25-2010 |
Huajun Peng, Hong Kong HK
| Patent application number | Description | Published |
|---|---|---|
| 20080291153 | IMAGE DISPLAY DEVICE AND METHOD - 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. | 11-27-2008 |
| 20090295705 | LCD Backlight Dimming, LCD / Image Signal Compensation and method of controlling an LCD display - A method of reducing power consumption in a liquid crystal display illuminated by a backlight device includes dimming the backlight and adjusting the intensity of the image to compensate for the dimmed backlight. A dimming factor for the backlight is based on a clipping point determining from the pixel intensity distribution of the image signal. The intensity of the image is adjusted based on the dimming factor, wherein a first tone mapping function is used to adjust pixel intensities below an intensity threshold and a second tone mapping function is used to adjust pixel intensities above the intensity threshold | 12-03-2009 |
Huajun Peng, Tai Po HK
| Patent application number | Description | Published |
|---|---|---|
| 20090051642 | Backlight assembly, method of driving the same and display system having the same thereof - The present invention provides a backlight assembly and a display system having the same, characterized in that the backlight assembly comprises: a plurality of light emission units and a control unit. Each unit having M kinds of emission components, each of the M kinds of emission components emitting light of a spectrum which is different from each other, wherein M is a positive integer equal to or greater than two. The control unit receives a first signal and determines a second signal according to the color information of the first signal, and individually controls light emission of each emission component of the plurality of light emission units based on the second signal, wherein the light emissions from the plurality of light emission units generate a spatially-dependent spectrum distribution, and the light emission of each light emission unit forms a color gamut in a color space which is individually different from others. | 02-26-2009 |
| 20090160877 | METHOD AND APPARATUS FOR ENHANCING AN IMAGE DISPLAYED ON AN LCD DEVICE - A method and apparatus for image enhancement in a display illuminated by a lighting device. Enhancement is via use of a non-linear mapping function. An illumination level for the lighting device is determined and used with the mapping function to find a compensation factor for each pixel of the image. The brightness property of each pixel is adjusted by its compensation factor. | 06-25-2009 |
| 20090167670 | METHOD OF DETERMINING LUMINANCE VALUES FOR A BACKLIGHT OF AN LCD PANEL DISPLAYING AN IMAGE - A controller for a backlight for a liquid crystal display (LCD) panel has at least two methods for determining illumination value for the backlight. The controller selects between the two methods based on properties of the image being displayed. The properties of the image include its color and its intensity. | 07-02-2009 |
| 20090263037 | Method and Apparatus for Enhancing the Dynamic Range of an Image - A method of converting an image signal from an original dynamic range to a target dynamic range includes dividing the original dynamic range and the target dynamic range in to a plurality of corresponding sub-ranges and mapping each original sub-range to its corresponding target sub-range. One of the dynamic ranges is divided into a plurality of sub-ranges having equal size and the other dynamic range is divided into the corresponding sub-ranges each having a size based on a characteristic of the corresponding equal size sub-ranges. The invention may be employed in display, capture and image processing apparatus. | 10-22-2009 |