| 摘要 |
<p>PROBLEM TO BE SOLVED: To realize a display panel which has unexpectedness and attractiveness as a product, by stereoscopically projecting a frame and switches as hologram images. SOLUTION: The display panel 1 for audio equipment or on-vehicle apparatus, etc., comprises a display 2 which performs operation display; a hologram film 3 which produces virtual images 3a and 3b of the frame, key switch, etc., in arbitrary positions on the front of the display panel 1, by reflecting or diffracting the light emitted from a light source 4; a transparent touch panel 6 for outputting a control signal to the apparatus described, by detecting that the key switch position of the virtual images projected by the hologram film 3 is pressed; and an optical shutter 5, which is interposed between the hologram film 3 and the touch panel 6 and is capable of changing over a transparent state and a light-shielding state.</p> |
