Abstract: This invention relates to an automatic detection method and apparatus for tuning the frequency and phase of displaying clock of a display to match the frequency and phase of pixel clock of a PC's display interface card. Based on the synchronized displaying clock, the image shown by digital display will be stable and bright in color. The automatic detection apparatus of invention includes a clock generation unit, a sampling unit, a data processing unit, an accumulation unit, and a decision unit. The clock generation unit creates a plurality of sampling clocks and according to these sampling packet sequences, the sampling unit samples and holds the pixel signals of image frames based on the pixel clock of display interface card, and then stores these data in its registers.

Abstract: An LCD projector includes: a light source assembly for supplying light source required for the LCD projector; an image generating mechanism for generating image to be projected, having an LCD panel; a projection objective lens assembly for projecting the image generated by the image generating mechanism onto a screen; and a cooling mechanism for cooling off the surface of the LCD panel of which the temperature is raised due to the radiation of the light source. A thermal diffusion film having good transparency and thermal diffusivity is attachd to the surface of the LCD panel on the one side nearer to the light source assembly so as to facilitate homogeneous thermal diffusion in the surface of the LCD panel, and thus prevent deterioration of quality of projected image due to thermal shimmering caused by cooling air flow coming from the cooling mechanism.

Abstract: A backlighting system for liquid crystal display (LCD) panels is disclosed to comprise at least a light source and a light pipe for receiving the light generated by the light source to provide the backlighting for the LCD panel. The light pipe consists of a flat front surface facing the LCD panel, a back surface facing the opposite direction to the LCD panel, and an end surface adjacent to the light source. The front surface extends toward the longitudinal direction away from the light source. The back surface consists of a plurality of parallel sections in parallel with the front surface, and connecting sections connecting adjacent parallel sections. The gap between the parallel section and the front surface decreases as the distance between the parallel section and the light source in the longitudinal direction increases.