Display Device
AssigneeTPO Hong Kong Holding Limited
InventorRalph Kurt
Life of this patent
Estimating the term…
Abstract
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.
Claims11
A display device (100), comprising:
- a light emitting picture element (120) and
- a contrast enhancing element (110), comprising a substrate provided with a plurality of wave guides (216) including a first material of a first refractive index, adjacent said picture element (120), and interstitial regions (212) including a second material of a lower refractive index than the first refractive index, the interstitial regions (212) being arranged between the wave guides (216) and formed narrowing in the direction of the picture element,
- an interface (214) between a wave guide (216) and an interstitial region (212) being provided with a reflective layer.
Dependencies are inferred from the claim text.