DISPLAY DEVICES

• US 20090146921A1
• Filed: 11/18/2008
• Published: 06/11/2009
• Est. Priority Date: 12/11/2007
• Status: Active Grant

• Current Assignee: Nichia Corporation
• Original Assignee: Nichia Corporation
• Inventors: TAKAHASHI, Tsuzuki
• Granted Patent: US 9,704,421 B2
• Time in Patent Office: Days
• US Class Current: 345/55
• CPC Class Codes: G09F 13/22 electroluminescent electroluminescent light sources per se H05B33/00
• CPC Class Codes: G09F 2013/222 with LEDs
• CPC Class Codes: G09F 27/008 Sun shades, shades, hoods or louvres on electronic displays to minimise the effect of direct sun light on the display
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes

Abstract

A display device in which pixels constituted by light emitting elements arranged on a substrate are arranged in a matrix, the substrate comprises: a canopy disposed at the upper or lower end of the pixels; and at least two kinds of anti-reflective components that are formed at a peripheral edge of the light emitting element and with different reflection angles with respect to incident light.

Claims

1. A display device in which pixels constituted by light emitting elements arranged on a substrate are arranged in a matrix, the substrate comprising:

a canopy disposed at the upper or lower end of the pixels; and

at least two kinds of anti-reflective components that are formed at a peripheral edge of the light emitting element and with different reflection angles with respect to incident light.

2. The display device according to claim 1, wherein two kinds of anti-reflective components comprises a first anti-reflective component disposed on the side near an upper end canopy, and a second anti-reflective component disposed on the side far the upper end canopy,

the first and second anti-reflective components comprises a first slanted face disposed on the side near the upper end canopy, and a second slanted face disposed on the side far the upper end canopy, respectively,

an angle of inclination (θ

₁₁) of the first slanted face with respect to the surface of the substrate on the first anti-reflective component is less than an angle of inclination (θ

₁₂) of the second slanted face with respect to the surface of the substrate.

3. The display device according to claim 1, wherein an angle of inclination (θ

₂₁) of the first slanted face with respect to the surface of the substrate on the second anti-reflective component is greater than an angle of inclination (θ

₂₂) of the second slanted face with respect to the surface of the substrate.

4. The display device according to claim 1,

the angle of inclination (θ

₁₁) of the first slanted face with respect to the surface of the substrate on the first anti-reflective component is the same as the angle of inclination (θ

₂₂) of the second slanted face with respect to the surface of the substrate on the second anti-reflective component, and

the angle of inclination (θ

₁₂) of the second slanted face with respect to the surface of the substrate on the first anti-reflective component is the same as the angle of inclination (θ

₂₁) of the first slanted face with respect to the surface of the substrate on the second anti-reflective component.

5. The display device according to claim 2, wherein the first anti-reflective component is formed in a region adjacent to the upper end canopy, and the length n from the base of the upper end canopy in the region satisfies the equation:

n=m·

tan α

°

where m is the height of the upper end canopy, and cc is the incidence angle of incoming light that produces reflected light when incident on the display device.

6. The display device according to claim 1, wherein the substrate further comprises a light blocking component that is lower than the canopy and higher than the anti-reflective components, on the lower end side within the pixels and the lower side of the light emitting elements.

7. The display device according to claim 2, wherein the substrate has a track-shaped flat portion between the light emitting elements and the first anti-reflective component or the second anti-reflective component.

8. The display device according to claim 1, wherein the substrate is subjected the surface thereof to machining or processing of delustering or pore formation.