| Patent application number | Description | Published |
|---|
| 20080198185 | DISPLAY DEVICE - A signal converter to make a display module conduct an n-ply display operation divides one frame period of input display data into n subframes to obtain n-ply display data, shifts the sampling position for each n-ply display data, samples the data to convert resolution thereof, rearranges in n ways a combination of subpixels included in each pixel of output display data resultant from the sampling, and varying the sampling position and the combination of subpixels for each subframe in a cooperative fashion. | 08-21-2008 |
| 20080272999 | DISPLAY DEVICE, DISPLAY DRIVER AND IMAGE DISPLAY METHOD - In a display device and a display driver, when a grayscale of a display image is equal to or lower than a specific grayscale value obtained from a histogram of the display image, a display grayscale is extended with a linear function. On the other hand, when a grayscale of a display image is equal to or higher than the specific grayscale value, histogram equalization of a part higher than the specific grayscale value is performed, and the display grayscale is extended with a non-linear function obtained from the histogram equalization. | 11-06-2008 |
| 20080316167 | DISPLAY DRIVER - A display driver driving a display panel according to inputted display data comprises: a first circuit changing brightness of a display image by conversion of the display data based on a first reference value and a second reference value, the first reference value being a display data value at a first position in an upper part of a histogram of the inputted display data, and the second reference value being a display data value at a second position in a lower portion of the histogram; a second circuit changing brightness of a illuminating device illuminating the display panel based on the first reference value; and a control circuit performing a processing of making the brightness of the display image high by the first circuit and a processing of making the brightness of the illuminating device low by the second circuit in correlation with the brightness of the display image. | 12-25-2008 |
| 20090015532 | DISPLAY DEVICE AND DRIVING CIRCUIT THEREOF - In a display device such as a liquid crystal display, a processing for compressing a range of display data (grayscale) to a low grayscale side (a grayscale range where response is fast) except for a high grayscale side (a grayscale range where response is slow) at a predetermined compression ratio to conduct display according to response characteristic of transition between grayscales and a temperature state and a processing for increasing a light amount of a backlight to compensate for luminance change due to the compression are performed, for example, in a liquid crystal panel of TN liquid crystal. Thereby, response can be made fast even at a low temperature time. | 01-15-2009 |
| 20090207182 | Display Device - The deterioration (darkness) of image quality due to a reduction in the brightness of a single color as a result of the conversion from RGB pixels to RGBW pixels is prevented and a reduction in the power is achieved. A processing portion for conversion from RGB to RGBW | 08-20-2009 |
| 20090289965 | LIQUID CRYSTAL DRIVING DEVICE - A liquid crystal driving device is provided, which can reduce the problem of contrast lowering of the liquid crystal display screen due to the decrease of the driving current of LED, by the control which is performed in order to cope with the decrease of the maximum rated current of LED as a light source of the backlight at a high temperature. The liquid crystal driving device includes a liquid crystal driving circuit, a backlight control unit, and display data expansion circuits. The liquid crystal driving circuit generates a liquid crystal driving signal to be supplied to a liquid crystal display panel in response to display data. The backlight control unit reduces driving current of the light emitting diode as a light source of the backlight module to illuminate the liquid crystal display panel, in response to the temperature rise of the liquid crystal display panel. The display data expansion circuit, in response to the temperature rise of the liquid crystal display panel, performs the data expansion of the display data, and compensates the contrast lowering of the liquid crystal display panel due to the dimming of the backlight module with the temperature rise of the liquid crystal display panel. | 11-26-2009 |
| 20090303264 | LIQUID CRYSTAL DRIVING DEVICE - A liquid crystal driving device includes a liquid crystal controller and specific color expansion circuits. The liquid crystal controller generates a liquid crystal drive signal to be supplied to a liquid crystal display panel in response to display data. The specific color expansion circuits generate an image output signal from a low-intensity image input signal corresponding to a specific color by intensifying a gradation using a specified factor. The specific color expansion circuits generate an image output signal from a high-intensity image input signal corresponding to a specific color by intensifying a gradation using another small factor. The image output signal is appropriately intensified by the specific color expansion circuits and is supplied as display data to the liquid crystal controller. | 12-10-2009 |
| 20100079479 | DISPLAY DRIVE CIRCUIT - A display drive circuit of the invention has: an initial-color-gamut-apex-coordinate-storing unit capable of storing initial color gamut apex coordinates; a user-target-color-gamut-apex-coordinate-storing unit capable of storing user target color gamut apex coordinates; a saturation-expansion-coefficient-deciding unit for deciding expansion coefficients of saturation data based on the initial and user target color gamut apex coordinates; and an expansion unit for expanding saturations of display data based on the saturation expansion coefficients. The expansion coefficients of saturation data are decided based on the initial and user target color gamut apex coordinates, and saturations of display data are expanded according to the expansion coefficients. Thus, the degree of expanding the saturations can be controlled for each color gamut or each of R, G and B color properties of an LC display panel. | 04-01-2010 |
| 20100295872 | DISPLAY DRIVER AND DRIVING METHOD - The present invention is directed to improve efficiency in use of a memory for storing display data which is used for an overdrive process. A display driver for driving a display device compresses image display data, stores the compressed data into a memory, and generates a preceding frame by decompressing the data read from the memory. A setting unit divides a display screen of the display device into, for example, a first region as a center part and a second region as a peripheral part. An overdrive computing unit generates overdrive display data in response to a present-time frame and the preceding frame, compresses the image display data in the first and second regions at first and second data compression ratios of small and large values, respectively, and stores the compressed data into the memory. By saving the space of the memory, the picture quality in the first region is improved. | 11-25-2010 |
| 20100302287 | DISPLAY DRIVING DEVICE AND DISPLAY DRIVING SYSTEM - Overdrive over multiple frames is made more efficient in a display device drive circuit that drives a display device so slow in response that target brightness is not reached even after overdrive is performed for one frame. When a display gray scale is changed from a first gray scale to a second gray scale, a display driving device varies overdrive driving voltage according to the number of frames since the point of time of the change. This makes it possible to obtain high-speed luminance response. When the number of frames for which an identical image is continuously displayed is known beforehand, the number of frames is set in a display pattern setting register and a function of detecting timing of a change of images is provided. This enables efficient overdrive. At low temperature, further, a display image is updated once for several frames according to temperature information. This enhances the visibility of the image. | 12-02-2010 |
