Lamp having illumination modules with different percentage of luminance adjustment

Patent metadata

Field	Value
Publication number	US-9826592-B2
Application number	US-201615003807-A
Country	US
Kind code	B2
Filing date	Jan 22, 2016
Priority date	Apr 28, 2015
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A lamp having a first illumination module, a second illumination module and a control circuit is provided. The first illumination module has a first light-emitting surface, and the second illumination module has a second light-emitting surface connected to the first light-emitting surface. The control circuit is coupled to the first illumination module and the second illumination module. When the control circuit increases the luminance of the first illumination module and the luminance of the second illumination module, a percentage of increasing the luminance of the first illumination module is less than a percentage of increasing the luminance the second illumination module.

First claim

What is claimed is:

1. A lamp comprising:
a first illumination module comprising a first light-emitting surface;
a second illumination module comprising a second light-emitting surface connected to the first light-emitting surface; and
a control circuit coupled to the first illumination module and the second illumination module;
wherein a percentage of luminance increasing of the first illumination module is less than a percentage of luminance increasing of the second illumination module when the control circuit increases the luminance of the first illumination module and the luminance of the second illumination module; and
wherein the lamp is used on a desktop comprising an information-device-use area corresponding to the first light-emitting surface and a reading-writing area corresponding to the second light-emitting surface.

2. The lamp of claim 1 , wherein the first light-emitting surface and the second light-emitting surface are of a same flat surface, and the second light-emitting surface comprises a luminance enhancement structure.

3. The lamp of claim 1 , wherein the first light-emitting surface and the second light-emitting surface are adjacent curved surfaces, and a curvature of the second light-emitting surface is greater than a curvature of the first light-emitting surface.

4. The lamp of claim 1 , wherein a length of the first light-emitting surface is greater than a length of the second light-emitting surface.

5. The lamp of claim 1 , further comprising:
a substrate comprising:
a first portion corresponding to the first light-emitting surface; and
a second portion corresponding to the second light-emitting surface;

wherein a plurality of luminaries of the first illumination module are disposed on the first portion in a first density, and a plurality of luminaries of the second illumination module are disposed on the second portion in a second density.

6. The lamp of claim 5 , wherein the first density is less than the second density, and an identical increasing amount of power is provided to each of luminaries on the substrate when increasing the luminance of the first illumination module and the luminance of the second illumination module.

7. The lamp of claim 5 , wherein the first density is equal to the second density, and an increasing amount of power provided to each luminary on the first portion is less than an increasing amount of power provided to each luminary on the second portion when increasing the luminance of the first illumination module and the luminance of the second illumination module.

8. The lamp of claim 5 , wherein length of the substrate is between thirty centimeters to fifty centimeters, and width of the substrate is between five centimeters to fifteen centimeters.

9. The lamp of claim 5 , wherein the substrate is an arcuate structure, and a tangent plane being tangent to an apex of the first light-emitting surface and a tangent plane being tangent to an apex of the second light-emitting surface form a first angle being between ten degrees to thirty degrees.

10. The lamp of claim 5 , wherein
the plurality of luminaries of the first illumination module comprises a plurality of first color light-emitting diodes and a plurality of second color light-emitting diodes;
the plurality of luminaries of the second illumination module comprises a plurality of first color light-emitting diodes and a plurality of second color light-emitting diodes;
the control circuit adjusts a color temperature of the first illumination module by controlling currents of the plurality of first color light-emitting diodes and the plurality of second color light-emitting diodes of the first illumination module; and
the control circuit adjusts a color temperature of the second illumination module by controlling currents of the plurality of first color light-emitting diodes and the plurality of second color light-emitting diodes of the second illumination module.

11. The lamp of claim 1 , further comprising a photography module configured to photograph the desktop to get an image so that the control circuit determines the information-device-use area according to the image.

12. The lamp of claim 11 , further comprising a motor coupled to the first illumination module and configured to drive the first illumination module to correspond to the information-device-use area.

13. The lamp of claim 11 , wherein the control circuit determines positions of the first light-emitting surface and the second light-emitting surface according to the image, such that the first light-emitting surface is corresponding to the information-device-use area and the second light-emitting surface is corresponding to the reading-writing area.

14. The lamp of claim 1 , wherein
the lamp operates under a normal mode or a scenario mode selectively;
the information-device-use area and the reading-writing area are of a same illuminance when the lamp operates under the normal mode; and
the percentage of increasing luminance of the first illumination module is less than the percentage of increasing luminance the second illumination module when the lamp operates under the scenario mode.

15. The lamp of claim 14 , further comprising a universal serial bus (USB) interface configured to be coupled to an information device for providing electrical power to the lamp, wherein the information device provides an instruction to command the lamp to operate under the normal mode or the scenario mode.

16. The lamp of claim 1 , further comprising:
a distance sensor coupled to the control circuit, configured to sense a distance between an object and the first illumination module when the lamp illuminates a surface of the object; and
an indicative light coupled to the control circuit;
wherein when the distance between the object and the first illumination module is in a specific range, the control circuit controls the indicative light to emit light;
wherein when the distance between the object and the first illumination module is out of the specific range, the control circuit controls the indicative light to stop emitting.

17. The lamp of claim 1 , further comprising a position indicative light configured to project a point of light in a direction being perpendicular to a tangent plane being tangent to an apex of the first light-emitting surface.

18. A lamp comprising:
a first illumination module comprising a first light-emitting surface;
a second illumination module comprising a second light-emitting surface;
a third illumination module comprising a third light-emitting surface, wherein the first light-emitting surface, the second light-emitting surface and the third light-emitting surface form a continuous curved surface, the first light-emitting surface is placed between the second light-emitting surface and the third light-emitting surface, a tangent plane being tangent to an apex of the second light-emitting surface and a tangent plane being tangent to an apex of the first light-emitting surface form a first angle, and a tangent plane being tangent to an apex of the third light-emitting surface and the tangent plane being tangent to the apex of the first light-emitting surface form a second angle; and
a control circuit coupled to the first illumination module, the second illumination module and the third illumination module, configured to control the lamp to operate under a normal mode or a scenario mode selectively;
wherein when the lamp operates under the normal mode, the first illumination module, the second first illumination module and the third illumination module gen

Assignees

• Qisda (Suzhou) Co Ltd
• Qisda Corp
• Qisda (Suzhou) Co Ltd

Inventors

• Tsai Chang-Yu
• Tsai Teng-Yi
• Pan Jiung-Cheng

Classifications

• H05B45/00 Primary

  Circuit arrangements for operating light-emitting diodes [LED] · CPC title

• H05B45/10

  Controlling the intensity of the light · CPC title

• H05B33/0872 Primary

  Electricity · mapped topic

• H05B33/0854

  Electricity · mapped topic

• H05B45/20 Primary

  Controlling the colour of the light · CPC title