Computer Monitors

Most personal mobile devices use LCDs to get a thin, low-power display. Recently, many monitors are also touch-sensitive.

Liquid Crystal Display (LCD) Monitors
For LCD monitors, the image is composed of a matrix of picture elements, or pixels, which can be represented as a matrix of bits, called a bit map. A color display might use 8 bits for each of the three colors (red, blue, and green), for 24 bits per pixel, permitting millions of different colors to be displayed. A raster refresh buffer, or frame buffer, is used to store the bit map.

The image to be represented onscreen is stored in the frame buffer, and the bit pattern per pixel is read out to the graphics display at the refresh rate.

The frame buffer is with a simplified design of just 4 bits per pixel. Each coordinate in the frame buffer on the left determines the shade of the corresponding coordinate for the raster scan CRT display on the right.

Pixel (X0, Y0) contains the bit patter 0011, which is a lighter shade on the screen than the bit pattern 1101 in pixel (X1, Y1). The LCD is not the source of light; instead, it controls the transmission of light.

Review: Computer Monitors
Which statement is NOT true about computer LCD (liquid crystal display) monitors?
      The LCD controls the transmission of light.
      The LCD is the source of light.
      The image can be represented as a matrix of bits, called a bit map.
      The image to be represented onscreen is stored in the frame buffer.
Result:        




      Cindy was on cloud nine (ecstatic)    
      after her boyfriend proposed to her.