| 摘要 |
PURPOSE:To recognize a back light source by color display and external light by monochromatic display by using three primary color filters consisting of red, green and blue and selecting the relation between the absorbing spectrums of the filters and the light emitting spectrum of the back light. CONSTITUTION:The light emitting spectrum of the back light source is a fluorescent lamp having sharp bright lines of blue, green and red. The 1st color filter absorbs at least green and red bright line spectrums, and 2nd and 3rd color filters absorb at least blue and red bright line spectrums and at least blue and green bright line spectrums respectively. Therefore, the spectrums of the light passing through the three kinds of filters are improved at both color purity and display color range. Thus, full color display having high chroma saturation is available at the use of the light source, and at the use of external light without using the light source, monochromatic display is executed. Consequently, full color display of high quality can be enjoyed. |
