| 摘要 |
A display device comprises a light emitting picture element ( 120 ) and a contrast enhancing element ( 110 ). The contrast enhancing element comprises a plurality of wave guides ( 216 ) separated by interstitial regions ( 212 ) being formed as narrowing recesses. An interface between a wave guide ( 216 ) and an interstitial region ( 212 ) is provided with a reflective layer. The narrowing recesses form a dead end for incident ambient light which is efficiently absorbed by the contrast enhancing element. On the other hand, light emitted by the picture element ( 120 ) of the display device is transmitted through the wave guides ( 216 ). As a result, the display device has a relatively high contrast ratio, particularly under bright ambient light conditions.
|
