| 摘要 |
<p>PURPOSE:To obtain a compact projector free of image distortion and color aberration and capable of adjusting the size of the picture and white balance by providing plural transmitting liquid crystals that polarize the incident colored lights and the polarizing plates that transmit the polarized colored lights. CONSTITUTION:In the vicinity of liquid crystals 11, 15, and 18, detector elements 39-41 made of photoelectric elements are provided. These detector elements 39-41 detect the colored lights that passed through crystals 11, 15, and 18, and its detection signals are inputted to a white balance adjuster 36. The detector elements 39-41 are disposed so as to detect the colored lights that penetrate the areas other than the usual picture areas of the liquid crystals 11, 15, and 18. Thus, plural cathode rays are not used and the liquid crystal matrix is not deflected by a high voltage like CTR, therefore, the peripheral circuitries are minimized to provided a compact device.</p> |
