LIGHT-EMITTING APPARATUS AND METHOD OF MANUFACTURING LIGHT-EMITTING APPARATUS

• US 20130193862A1
• Filed: 05/11/2011
• Published: 08/01/2013
• Est. Priority Date: 09/30/2010
• Status: Active Grant

• Current Assignee: Nichia Corporation
• Original Assignee: Nichia Corporation
• Inventors: Sasano, Haruaki
• Granted Patent: US 9,497,827 B2
• Time in Patent Office: Days
• US Class Current: 315/192
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
• CPC Class Codes: H05B 47/10 Controlling the light source

Abstract

Provided is a light-emitting apparatus, wherein a plurality of light-emitting elements that emit the same type of color are arranged in a plurality of row directions and column directions, the plurality of light-emitting elements arranged in the row direction are connected in series in the row direction, and the rows having the plurality of light-emitting elements connected in series are connected in parallel. The plurality of light-emitting elements comprise first light-emitting elements, and second light-emitting elements having smaller outputs than the first light-emitting elements, and the first light-emitting elements and the second light-emitting elements are arranged alternately in each of the row directions.

Claims

1. A light-emitting apparatus, comprising:

a plurality of light-emitting devices emitting light having the same hue,

wherein the light-emitting devices are arranged in a plurality of row and column directions;

the light-emitting devices arranged in the row direction are serially connected in the row direction; and

each row having the serially connected light-emitting devices is connected in parallel,

the light-emitting devices comprises

a first and a second light-emitting devices,

wherein the second light-emitting device has a lower output than that of the first light-emitting device; and

the first and the second light-emitting devices are alternately disposed in each row direction.

2. The light-emitting apparatus according to claim 1, wherein at least one row does not have the same average of forward voltages of the light-emitting devices as that of another row.

3. The light-emitting apparatus according to claim 1, wherein the first and the second light-emitting devices are continuously disposed in the column direction.

4. The light-emitting apparatus according to claim 1, wherein the first and the second light-emitting devices are alternately disposed in the column direction.

5. The light-emitting apparatus according to claim 1, wherein the numbers of the first and the second light-emitting devices which are alternately disposed in each row direction are the same.

11. The light-emitting apparatus according to claim 1, comprising:

a substrate on which the plurality of light-emitting devices are arranged;

an anode and a cathode to apply a voltage on the plurality of light-emitting devices, the anode and the cathode being formed on the substrate; and

a light-reflecting resin formed on the substrate, the resin surrounding the plurality of light-emitting devices.

6. A light-emitting apparatus, comprising:

a plurality of light-emitting devices emitting light having the same hue,

wherein the light-emitting devices are arranged in a plurality of row and column directions;

the light-emitting devices arranged in the row direction are serially connected in the row direction; and

each row having the serially connected light-emitting devices is connected in parallel,

the light-emitting devices comprises

a first, a second, and a third light-emitting device;

wherein the second light-emitting device has a lower output than that of the first light-emitting device;

the third light-emitting device has a lower output than that of the second light-emitting device; and

the first, the second, and the third light-emitting devices are disposed in each row direction in a predetermined order.

7. The light-emitting apparatus according to claim 6, wherein at least one row does not have the same average of forward voltages of the light-emitting devices as that of another row.

8. The light-emitting apparatus according to claim 6, wherein the first, the second, and the third light-emitting devices are continuously disposed in the column direction.

9. The light-emitting apparatus according to claim 6, wherein the first, the second, and the third light-emitting devices are disposed in the column direction in a predetermined order.

10. The light-emitting apparatus according to claim 6, wherein the numbers of the first, the second, and the third light-emitting devices which are disposed in each row direction in the predetermined order are the same.

18. The light-emitting apparatus according to claim 6, comprising:

a substrate on which the plurality of light-emitting devices are arranged;

an anode and a cathode to apply a voltage on the plurality of light-emitting devices, the anode and the cathode being formed on the substrate; and

a light-reflecting resin formed on the substrate, the resin surrounding the plurality of light-emitting devices.

12. A light-emitting apparatus, comprising:

a plurality of light-emitting devices emitting light having the same hue, the light-emitting devices being arranged in a plurality of row and column directions;

a substrate having the light-emitting devices thereon;

an anode wiring section and a cathode wiring section electrically connected to the light-emitting devices, the sections being formed on the substrate; and

an anode and a cathode between which a voltage is applied via the anode wiring section and the cathode wiring section,

wherein the same number of the light-emitting devices is serially connected; and

each end of the serially connected light-emitting devices is arranged in a column direction and is electrically connected to either the anode wiring section or the cathode wiring section to be connected in parallel,

the light-emitting devices comprises a first and a second light-emitting devices,

wherein the second light-emitting device has a lower output than that of the first light-emitting device; and

the first and the second light-emitting devices are alternatively disposed in each row direction.

13. The light-emitting apparatus according to claim 12, wherein the first and the second light-emitting devices are continuously disposed in the column direction.

14. The light-emitting apparatus according to claim 12, wherein the first and the second light-emitting devices are alternately disposed in the column direction.

15. The light-emitting apparatus according to claim 12, wherein the numbers of the first and the second light-emitting devices which are alternately disposed in each row direction are the same.

16. A method for manufacturing a light-emitting apparatus, comprising:

a plurality of light-emitting devices emitting light having the same hue,

wherein the light-emitting devices are arranged in a plurality of row and column directions;

the light-emitting devices arranged in the row direction are serially connected in the row direction; and

each row having the serially connected light-emitting devices is connected in parallel, the method comprising;

a light-emitting device classification step of classifying the plurality of light-emitting devices emitting light having the same hue into a first and a second groups, the second group having a lower output than that of the first group; and

a light-emitting device arrangement step comprising;

arranging first light-emitting devices selected from the first group and second light-emitting devices selected from the second group in the row and column directions on a substrate having an anode and a cathode so that the first and the second light-emitting devices are alternately disposed in the row and column directions;

serially connecting the light-emitting devices disposed in each row direction;

connecting each row in parallel; and

electrically connecting the light-emitting devices to the anode and the cathode.

17. The method according to claim 16, wherein the light-emitting device arrangement step further comprises:

a first step of arranging the first light-emitting devices in a column direction; and

a second step of arranging the second light emitting devices in a column direction adjacent to the first light-emitting devices arranged in the first step.