Light emitting diode array
US6252351A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 23, 1998 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Dec 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/84
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A contact layer having a low resistance in an LED is extended from an inside edge of a light take-out region in a light emitting dot to a central position thereof, whereby an input current in the light take-out region expands, while an electrode is extended from an inside edge of the light take-out region to the center of the light take-out region so as to shape like substantially a letter T with a length which is not over the center, whereby increase in an electrode covering ratio in the light take-out region can be suppressed. As a result, a uniform light output in the light take-out region can be attained, so that a light output can be remarkably improved. When electrodes in the light take-out regions in adjacent light emitting dots are staggered relative to the direction perpendicular to an aligned direction of the light take-out region (a reference straight line), the light take-out regions are arranged horizontally in substantially a straight line, so that a light emitting pattern in the aligned direction of the light take-out regions are not so staggered. Thus, an LED array having a high output and a uniform distribution of light intensity is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.