Lighting device

Patent metadata

Field	Value
Publication number	US-11974367-B2
Application number	US-202217937785-A
Country	US
Kind code	B2
Filing date	Oct 4, 2022
Priority date	Apr 13, 2022
Publication date	Apr 30, 2024
Grant date	Apr 30, 2024

Abstract

A lighting device includes a light board and a light dimmer circuit. The light board includes multiple first light emitting elements and second light emitting elements. The first light emitting elements are disposed in a first area of the light board. The second light emitting elements are disposed in a second area of the light board. The light dimmer circuit is configured to drive the second light emitting elements to generate flickering lights from the second area of the light board, and is configured to drive the first light emitting elements to generate non-flickering lights from the first area of the light board.

First claim

What is claimed is:

1. A lighting device, comprising:
a light board, comprising:
a plurality of first light emitting elements, disposed in a first area of the lighting device; and
a plurality of second light emitting elements, disposed in a second area of the lighting device; and
a light dimmer circuit, configured to drive the second light emitting elements to generate flickering lights from the second area of the lighting device, and configured to drive the first light emitting elements to generate non-flickering lights from the first area of the lighting device, and wherein the light dimmer circuit comprises:
a pure DC current generating circuit, configured to generate a pure DC current to directly drive the first light emitting elements to emit the non-flickering lights; and
a pulse DC current generating circuit, configured to generate a pulse DC current to directly drive the second light emitting elements to emit the flickering lights, wherein a pulse frequency of the pulse DC current corresponds to a flicker frequency of the flickering lights, wherein a difference between high logic level and low logic level of the pulse DC current is less than ½ times of an amplitude of the pure DC current.

2. The lighting device of claim 1 , wherein the flickering lights have the flicker frequency, wherein the flicker frequency is a frequency perceptible by human visual system.

3. The lighting device of claim 1 , wherein the first area is surrounded around the second area.

4. The lighting device of claim 1 , wherein a difference between high logic level and low logic level of the pulse DC current is less than ¼ times of an amplitude of the pure DC current.

5. The lighting device of claim 1 , wherein logic level of the pulse DC current is set in a range of 0˜1 times of an amplitude of the pure DC current.

6. The lighting device of claim 1 , wherein the flicker frequency is set in a range of 1 Hz-80 Hz.

7. The lighting device of claim 1 , wherein the first light emitting elements have a specification same with the second light emitting elements.

8. The lighting device of claim 1 , wherein the non-flickering lights comprise a non-visible-flicker, wherein the non-visible-flicker is hard to be perceptible by human visual system.

9. A lighting device, comprising:
a light board, comprising a plurality of first light emitting elements and a plurality of second light emitting elements; and
a light dimmer circuit, configured to drive the first light emitting elements by a pure DC current, and configured to drive the second light emitting elements by a pulse DC current, wherein the light dimmer circuit comprises: a pure DC current generating circuit, configured to generate the pure DC current to directly drive the first light emitting elements to emit non-flickering lights; and a pulse DC current generating circuit, configured to generate the pulse DC current to directly drive the second light emitting elements to emit flickering lights, wherein a pulse frequency of the pulse DC current corresponds to a flicker frequency of the flickering lights, and wherein a difference between high logic level and low logic level of the pulse DC current is less than ½ times of an amplitude of the pure DC current.

10. The lighting device of claim 9 , wherein the light dimmer circuit is configured to drive the first light emitting elements with the pure DC current to emit non-flickering lights, and the light dimmer circuit is configured to drive the second light emitting elements with the pulse DC current to emit flickering lights.

11. The lighting device of claim 10 , wherein the flickering lights have a flicker frequency, wherein the flicker frequency is perceptible by human visual system.

12. The lighting device of claim 9 , wherein a difference between high logic level and low logic level of the pulse DC current is less than ¼ times of an amplitude of the pure DC current.

13. The lighting device of claim 9 , wherein logic level of the pulse DC current is set in a range of 0˜1 times of an amplitude of the pure DC current.

14. The lighting device of claim 9 , wherein the flicker frequency is set in a range of 1 Hz-80 Hz.

15. The lighting device of claim 9 , wherein the first light emitting elements have a specification same with the second light emitting elements.

16. The lighting device of claim 9 , the non-flickering lights comprises non-visible-flicker, wherein the non-visible-flicker is hard to be perceptible by human visual system.

Assignees

• Delta Electronics Inc

Inventors

• Wang Chih-Hsien
• Cheng Ming-Chieh
• Chen Po-Yen
• Chang Shih-Chieh
• Tu Kuan-Hsien
• Lin Xiu-Yi
• Wang ling-chun

Classifications

• H05B45/10 Primary

  Controlling the intensity of the light · CPC title

• H05B45/32

  Pulse-control circuits · CPC title

• H05B47/155

  Coordinated control of two or more light sources · CPC title

• F21S2/00 Primary

  Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction · CPC title

• H05B45/385 Primary

  using flyback topology · CPC title