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: 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: The invention discloses a plasma display panel (PDP). The PDP grounds an exposed transparent conductive layer to the inner component thereof, so as to shield off electromagnetic interference (EMI). Accordingly, there is no metal structure in the second protective layer formed on the transparent conductive layer, such that the second protective layer can be easily attached onto the transparent conductive layer. Therefore, the manufacturing of PDP is getting much easier, and the yield rate will then increase.

Abstract: A method for adjusting a target gray level of a target pixel based on a spatial mask is provided. The target pixel is surrounded with N adjacent pixels; each of the N adjacent pixels respectively has an adjacent gray level. The method first multiplies the target gray level with a sharpness index to generate an amplified target gray level and respectively multiplies each of the adjacent gray level with an adjacent index to generate N modified adjacent gray levels. Then, the amplified target gray level and the N modified adjacent gray levels are added up to generate a first gray level sum. The method multiplies the first gray level sum with a multiplying parameter to generate a second gray level sum. At last, the method divides the second gray level sum by a dividing parameter to generate an adjusted gray level for the target pixel.

Abstract: The present invention is to provide a method for making a shadow mask for an opposed discharge plasma display panel by etching one lateral surface of a metal slab to produce a plurality of parallel and equidistant barrier ribs along the vertical and horizontal directions on the lateral surface and a discharging cell by enclosing every four adjacent barrier ribs. A shadow hole is formed at the middle of each discharging cell and etched through the metal slab, and at least one groove interconnected to the shadow holes is produced on another lateral surface of the metal slab by utilizing a rolling process or a stamping process. The adjacent grooves are interconnected with each other, and a plurality of air guide channels is formed on another lateral side, such that a shadow mask can be made in a simple and fast manner, chemical pollutions caused by a traditional double-sided etching can be minimized, and the product yield rate and the manufacturing cost can be effectively improved and lowered.

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 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: The invention provides an image adjusting apparatus for receiving a set of input signals transmitted from a video interface, which is used for receiving a plurality of sets of input signals. The image adjusting apparatus is further used for automatically adjusting the set of input signals to generate a set of output signals. The image adjusting apparatus includes an operation module, a storage module, an offset module and a gain module. The operation module receives a test image to generate a plurality of adjusting signals. The storage module stores the adjusting signals. The offset module transforms, according to the adjusting signals, the set of input signals into a set of temporary signals. Moreover, the gain module transforms, according to the plurality of adjusting signals, the set of temporary signals into the set of output signals.

Abstract: The invention discloses an apparatus for increasing the display gray levels. The apparatus includes a signal transformation circuit, an error diffusion circuit, and an operation circuit. According to a first predetermined manner, the signal transformation circuit transforms a set of image signals into a set of transformed signals. The error diffusion circuit receives the set of transformed signals and generates a set of diffused signals according to a judging rule. The operation circuit receives the set of diffused signals and generates a set of output image signals according to a second predetermined manner and a predetermined operational rule.