US 6,320,322 B1 · Light emitting appliance

Abstract

A blue light emitting element B and green light emitting element G are coupled in series with each other to constitute a ring. The coupling points of these elements are used as a first connecting point 24 and a second connecting point 26. The one electrode of a red light emitting element R is connected to the first input terminal 24 and the other electrode thereof is used as a third terminal. By adjusting the voltages to be applied to the input terminals 24, 26 and 28, the light emitting state of each light emitting element is adjusted. Therefore, it is only required that wiring is made for these three input terminals. With the input state of the input terminal 24 being fixed, only the input states of the input terminals 26 and 28 are changed using switches SW1 and SW2 so that the light emitting state of each light emitting element can be adjusted. Thus, the device structure inclusive of its wiring can be further simplified, thereby realizing high density display of the light emitting device.

Claims18

Dependent claims

A light emitting appliance comprising unit light emitting devices each composed of at least three light emitting elements which are caused to emit light by application of a voltage between respective pairs of anodes and cathodes and have substantially different emitted light colors, wherein

a first light emitting element and a second light emitting element are coupled in series with each other to constitute a ring and coupling points of these elements are used as a first connecting point and a second connecting point, and
a first electrode of a third light emitting element is connected to a first input terminal and a second electrode of the third light emitting element is used as a third input terminal.

Dependencies are inferred from the claim text.

Light emitting appliance

Life of this patent

Light emitting appliance

Life of this patent

Abstract

Claims18