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Unformatted text preview: Digital Camera - LCD Image Display In addition to imaging optics, a camera requires a viewfinder system that al- lows the user to preview the scene to be recorded. This viewfinder system can be 1) an optical telescope (that may or may not use the imaging objective lens) or 2) a di- rect image display. Modern digital still cameras, TV cameras, and movie cameras typ- ically have a liquid crystal display (LCD) image display to allow direct viewing of the image. A typical technology for these displays utilizes low-temperature polycrystalline silicon thin-film transistor (TFT) LCDs. The image aspect ratio of these displays is AR = L WLCD /L HLCD . For the Canon models S230, SD550, and SD630 digital cameras, the aspect ratio is the same as the aspect ratio for the charge-coupled device (CCD) sen- sor. (See Digital Camera - CCD Image Sensor.) The quantities L WLCD and L HLCD are shown in the figure below....
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This note was uploaded on 04/29/2008 for the course ECE 4500 taught by Professor Gaylord during the Spring '08 term at Georgia Institute of Technology.
- Spring '08