Abstract: The present invention provides a method to automatically regulate brightness of liquid crystal displays (LCDs), which resolves the overload and easy fatigue of human eyes and poor image contrast due to high brightness of the conventional LCD. The present invention includes use of four parts, including an image brightness regulating unit, an image brightness ratio computation and output controlling unit, an ambient light detection and brightness adaptation regulating unit and an image gray level expanding unit. The image signals of an LCD are processed in such a manner to enable automatic control of optical flux of LCD TV by regulating the gray level of output images. Also, optical flux of LCD TV can be automatically controlled with the change of images and ambient light, thus alleviating overburdening of human eyes and improving the contrast and comfort of images for a better visual effect.

Abstract: The method to reduce image sticking in a plasma display panel (PDP) includes four steps. There is converting a relationship between gray level and brightness of an input signal into a linear relation by a converter. Next, there is recording an image with a static image detector at time t using a frame buffer, and after a period of time ?t, comparing the image at time t with the image at time t+?t, thereby identifying static or dynamic images in the pixel. Then, there is recording a gain of every pixel by a brightness regulator using an image gains memory buffer zone, the gain being regulated according to detection results of the static image detector. Finally, there is improving gray level performance of output images by a gray level promoter and brightness converter. Thus, method actively detects static pixels and reduces brightness in the static region for minimized image sticking.

Abstract: The invention discloses a hue dividing and judging device including a memory unit, a calculation module, and a judgment module. The memory unit is used for storing a look-up table, and the look-up table records N boundaries, wherein the N boundaries includes j+1 operative boundaries for defining j color areas. The calculation module is used for calculating the hue of each pixel of an input image. According to the look-up table, the judgment module is used for judging where the hue of each pixel falls within two of the operative boundaries, so as to judge that the hue of the pixel of the input image falls into which one of the color areas. Accordingly, if there are more operative boundaries recorded in the look-up table, the hue will be divided into more color areas, and the user will have more choices for adjusting the color of the input image.

Abstract: A method for adjusting a degree of saturation of a target pixel is provided. In a first color space, the target pixel is represented by a brightness factor and a set of color factors. Based on the set of color factors, the method first generates an original saturation and a hue factor. Then, selectively according to the brightness factor, the hue factor, and the original saturation, an adjusting gain is generated. The method, according to this invention, multiplies the original saturation by the adjusting gain to generate a new saturation for the target pixel.

Abstract: A method for adjusting an image on the basis of characteristics of a display system is provided. The image includes M horizontal lines. Each of the M horizontal lines respectively includes N pixels. Each pixel has an original gray level. A look-up table previously stores a plurality of conversion coefficients related to the characteristics of the display system. The method first calculates an ith loading according to the N original gray levels of the N pixels in the ith horizontal line. Based on the ith loading, an ith conversion coefficient corresponding to the ith loading is selected from the plurality of conversion coefficients in the look-up table. The method respectively multiplies the N original gray levels of the N pixels in the ith horizontal line by the ith conversion coefficient to generate N new gray levels for the N pixels in the ith horizontal line, whereby the image is adjusted.

Abstract: The present invention is to provide a method of driving a high definition opposed discharge PDP comprising transversely disposing a barrier rib on a center of any elongate discharge cells of the opposed discharge PDP to divide the discharge cell into two sub-cells; disposing a sustain electrode on a front substrate corresponding to either sub-cell; causing a driving circuit to apply a sustaining pulse to each of the plurality of sustain electrodes in a sustaining period of each sub-field; and causing a phase of the sustaining pulse on the sustain electrode corresponding to one sub-cell to have a phase difference of 180 degrees relative to that of the sustaining pulse on the sustain electrode corresponding to the other adjacent sub-cell in order to effectively eliminate noise caused by vibration of the opposed discharge PDP in discharge, reducing peak current and electromagnetic interference, and greatly increase both light emitting efficiency and brightness of the opposed discharge PDP.

Abstract: The present invention is to provide a method of driving an opposed discharge PDP comprising causing a driving circuit of the PDP to apply a sustaining pulse to each of a plurality of sustaining electrodes thereof for showing each of a plurality of sub-fields wherein a phase of the sustaining pulse of any of the sustaining electrodes is 180 degrees different from that of the sustaining pulse of the adjacent sustaining electrode, i.e. a waveform of odd number pixels is 180 degrees different from that of even number pixels in a sustaining period, enabling two adjacent discharge cells discharge in opposite directions so as to eliminate noise caused by vibration of the PDP in discharge, lower peak current and greatly decrease load on sustaining circuit and resulting in prolonging useful life of the circuit and increasing reliability of the circuit.

Abstract: The present invention discloses a method and an apparatus for applying a dynamic contrast expansion technique to plasma display panels through performing a gamma conversion for the inputted image to convert the relationship of the brightness and gray level of the inputted image into a linear relation, performing a subtraction for the gray level value of the image to maintain the image at its smallest color deviation, analyzing the image property histogram to compute the maximum gray level and the minimum gray level required for carrying out the image contrast expansion and obtaining an image contrast expansion gain, and adopting an average of several previously inputted image contrast expansion gains and a current image contrast expansion gain as the contrast expansion gain used in the actual contrast expansion gain formula, so as to compute a new outputted gray level value after the image contrast expansion is performed.

Abstract: The invention discloses an apparatus for adjusting the brightness of the ith image of an inputted image sequence in a display system. The image sequence includes a plurality of images which each consists of a plurality of pixels. The apparatus includes a first calculating module for calculating a current brightness ratio, a second calculating module for calculating an averaged brightness ratio, a judging module for outputting one selected from the current brightness ratio or the averaged brightness ratio as an outputted brightness ratio, a determining module for storing a plurality of brightness ratios and the corresponding gains and for determining the gain corresponding to the outputted brightness ratio, and an adjusting module for multiplying the gray scale level of each pixel of the ith image by the gain corresponding to the outputted brightness ratio respectively, so as to adjust the brightness of the ith image.

Abstract: A conductive polyester-based alloy sheet having three layers laminated together by co-extrusion, which comprises one substrate layer and two surface layers, wherein the surface layers are conductive and comprise polyester, acrylonitrile-butadiene-styrene (abbreviated as ABS) and/or polystyrene (abbreviated as PS), a compatibilizer, and a toughening agent, wherein the surface layers have a surface conductivity of not more than 10.sup.8 ohms. The melt flow index of the material for the conductive layers during the extrusion step is not less than 5.0 g/min (loading, 10 Kg; temperature, 250.degree. C.). The substrate layer is made from acrylonitrile-butadiene-styrene and/or polystyrene.

Abstract: A conductive polyester sheet having three layers, comprising one substrate layer and two surface layers, laminated together by co-extrusion is provided. All the three layers are made from polyester and/or copolyester, and the surface layers further contain carbon black and thus are useful as conductive layers. The sheet has a surface conductivity of not more than 10.sup.8 ohms and the flow index of the material for the conductive layers during the extrusion step is not lower than 60 g/min (loading, 2160 g; temperature, 275.degree. C.).