Abstract: The present invention discloses a method for compensating a brightness error of a flat panel display that compensates the input gray levels under a fixed sustain frequency by an error diffusion compensation circuit. After the gray levels are inputted to the flat panel display, the brightness will be outputted and measured to obtain an actual output brightness, and an ideal output brightness corresponding to the input gray level is calculated according to the linear proportional relation between the input gray level and its ideal output brightness, and then a look up table is created according to the actual output brightness and the ideal output brightness, such that the look up table can be used to overcome the gray level error as well as the error between the actual output brightness and the ideal output brightness of the flat panel display.

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: A plasma display panel with color space transformation device is described. The plasma display panel with color space transformation device has a digital board, a display control circuit and a color plasma display panel. The digital board has a color space transformation device to transform the color space of the color plasma display panel into a new color space according to a video specification of images or into a new color space according to a user requirement. The digital board further modifies the images to fit the new color space. The color plasma display panel shows the modified images in the new color space.

Abstract: A method for adjusting an input image on the basis of the characteristics of a display system is provided. The input image includes N color elements and the display system is capable of displaying P second gray levels. P sets of first conversion coefficients related to the characteristics of the display system are beforehand stored in a look-up table. The method according to this invention first calculates an estimated gray level according to the input image and a set of predetermined second conversion coefficients. Then, a set of third conversion coefficients corresponding to the estimated gray level is selected from the look-up table. A final gray level is calculated on the basis of the set of third conversion coefficients. Finally, the final gray level and the N color components are combined into an adjusted image to replace the input image, whereby the input image is adjusted.

Abstract: The invention provides an apparatus for dynamically adjusting the saturation of an image signal consisting of a plurality of pixels. The apparatus includes a first transformation module, an operation module, a gain module, an adjustment module and a second transformation module. The first transformation module transforms the pixels of the image signal into a plurality of intermediate signals, where each of the intermediate signals has a respective saturation value. The intermediate signals are adjusted in accordance with a gain signal determined by a histogram relative to the saturation distribution of the intermediate signals. The adjusted intermediate signals are transformed back into the pixels of the image signal, thereby the saturation of the image signal is adjusted.

Abstract: This invention provides a dynamic image adjusting apparatus for dynamically adjusting the contrast of a first image signal which includes a plurality of pixels. The adjusting apparatus includes a first transformation module, an operation module, and a second transformation module. The first transformation module receives the first image signal for generating a plurality of adjusting signals, wherein each pixel of the first image signal corresponds to one of the plurality of adjusting signals. The oepration module is coupled to the first transformation module and receives a first set of adjusting signals of the plurality of adjusting signals to generate a first gain curve. The second transformation module is coupled to the operation module and the first transformation module, and generates a second image signal according to the first gain curve and the plurality of adjusting signals.

Abstract: A color adjustment device and method for the plasma display panel. The color adjustment device comprises a look up table and an error diffusion circuit. Wherein, the look up table is used to store a plurality of gray scale data, select one corresponding data from the plurality of gray scale data according to a received gray scale input value as an output. The error diffusion circuit receives the gray scale data output from the look up table, and achieves the objective of improving the color adjustment precision by using an error diffusion compensation method.

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.

Abstract: A plasma display panel with a gray level white balance device is described. The plasma display panel with a gray level white balance device has a digital board, a display control circuit and a color plasma display panel. The digital board utilizes the gray level white balance device to modify gray levels of the image to fit the gray levels of the color plasma display panel according to a gray level lookup table. The gray level lookup table is established by measuring the color temperature and color deviation of the color plasma display panel at different gray levels. Curve fitting or linear regression techniques further utilize to enhance the resolution of the gray level lookup table.

Abstract: An electrode structure with white balance adjustment for plasma display panel is described. The electrode structure has a comb electrode, a first transparent electrode and a second transparent electrode. The first transparent electrode and the second transparent electrode are separated from the comb electrode, respectively. Changing the profile of the first transparent electrode and the second transparent electrode increases the flexibility of the transparent electrodes. Further, the width of the first electrodes responsive to the luminous regions is adjusted to control the luminance through the first transparent electrode so that white balance of the plasma display panel is precisely corrected.

Abstract: A plasma display panel with a gray level white balance device is described. The plasma display panel with a gray level white balance device has a digital board, a display control circuit and a color plasma display panel. The digital board utilizes the gray level white balance device to modify gray levels of the image to fit the gray levels of the color plasma display panel according to a gray level lookup table. The gray level lookup table is established by measuring the color temperature and color deviation of the color plasma display panel at different gray levels. Curve fitting or linear regression techniques further utilize to enhance the resolution of the gray level lookup table.

Abstract: A plasma display panel with color space transformation device is described. The plasma display panel with color space transformation device has a digital board, a display control circuit and a color plasma display panel. The digital board has a color space transformation device to transform the color space of the color plasma display panel into a new color space according to a video specification of images or into a new color space according to a user requirement. The digital board further modifies the images to fit the new color space. The color plasma display panel shows the modified images in the new color space.

Abstract: A barrier rib structure for a plasma display panel is described. The barrier rib structure formed on a back substrate has a plurality of parallel barrier ribs. Each barrier rib has a plurality of discharge spaces therein divided by separate walls. Each of the discharge spaces is connected to a small gas channel beside the barrier rib through a small connect opening.

Abstract: A barrier rib structure for a plasma display panel is described. The barrier rib structure formed on a back substrate has a plurality of parallel barrier ribs. Each barrier rib has a plurality of nodes composed of two side-expanded trapezoid bulges. The barrier ribs are arranged according to the nodes to form a plurality of discharge spaces between the barrier ribs and a plurality of gas channels between the nodes to connect the discharge space.

Abstract: A barrier rib structure for a plasma display panel is described. The barrier rib structure formed on a back substrate has a plurality of parallel barrier ribs. Each barrier rib has a plurality of nodes composed of two side-expanded trapezoid bulges. The barrier ribs are arranged according to the nodes to form a plurality of discharge spaces between the barrier ribs and a plurality of gas channels between the nodes to connect the discharge space.

Abstract: A barrier rib structure for a plasma display panel is described. The barrier rib structure formed on a back substrate has a plurality of parallel barrier ribs. Each barrier rib has a plurality of discharge spaces therein divided by separate walls. Each of the discharge spaces is connected to a small gas channel beside the barrier rib through a small connect opening.

Abstract: A color adjustment device and method for the plasma display panel. The color adjustment device comprises a look up table and an error diffusion circuit. Wherein, the look up table is used to store a plurality of gray scale data, select one corresponding data from the plurality of gray scale data according to a received gray scale input value as an output. The error diffusion circuit receives the gray scale data output from the look up table, and achieves the objective of improving the color adjustment precision by using an error diffusion compensation method.

Abstract: In an alternating current discharge type plasma display panel (PDP) a plurality of parallel barrier walls are formed on a top surface of a back substrate of the PDP and barrier walls are disposed corresponding to cross-points of X electrodes and Y electrodes on a front substrate of the PDP. A structure includes a plurality of discharge cells between the adjacent barrier walls having smaller width corresponding to the X and Y electrodes for forming a large first space, a plurality of non-discharge cells each between the adjacent discharge cells for forming a small second space served as a gas channel between the adjacent discharge cells, and a junction between one discharge cell and the adjacent non-discharge cell, such that energy released from a gas discharge in the discharge cells is concentrated within the discharge cells for increasing discharge efficiency.

Abstract: A compensation process for improving color saturation and image quality of a plasma display panel (PDP) comprises the steps of a) calculating the brightness of a visible light generated by environment light on PDP through performing a numeric operation according to a color mixing theory, and the corresponding light ought to be generated by each of red, green, and blue discharge cells of each of a plurality of pixels on the PDP sufficient to exclude the visible light generated by environment light on PDP; b) increasing or decreasing strength of input image signals of each of said red, green, and blue discharge cells in accordance with the result of calculation; and c) generating light from each of said red, green, and blue discharge cells to eliminate said visible light from causing an adverse effect on said PDP. This can reduce manufacturing cost without modifying the construction of PDP or performing an additional processing thereon.

Abstract: In an alternating current discharge type plasma display panel (PDP) a plurality of parallel barrier walls are formed on top surface of a back substrate of the PDP and barrier walls are disposed corresponding to cross-points of X electrodes and Y electrodes on a front substrate the PDP. A structure comprises a plurality of discharge cells between the adjacent barrier walls having smaller width corresponding to the X and Y electrodes for forming a large first space, a plurality of non-discharge cells each between the adjacent discharge cells for forming a small second space served as a gas channel between the adjacent discharge cells, and a junction between one discharge cell and the adjacent non-discharge cell, whereby energy released from a gas discharge in the discharge cells is concentrated within the discharge cells for increasing discharge efficiency.