PROJECTING DEVICE

• US 20170164449A1
• Filed: 12/06/2016
• Published: 06/08/2017
• Est. Priority Date: 12/07/2015
• Status: Abandoned Application

• Current Assignee: Funai Electric Co., Ltd. (Funai Electric Holdings Company Limited)
• Original Assignee: Funai Electric Co., Ltd. (Funai Electric Holdings Company Limited)
• Inventors: SHIMIZU, SHINYA
• Application Number:
  US15/371,175
• Publication Number:
  US 20170164449A1
• Time in Patent Office: Days
• CPC Class Codes: B60K 2360/27 using semi-transparent optical elements
• CPC Class Codes: B60K 2360/31 Virtual images
• CPC Class Codes: B60K 2360/33 Illumination features
• CPC Class Codes: B60K 2360/333 Lasers
• CPC Class Codes: B60K 2360/334 Projection means
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/213 Virtual instruments
• CPC Class Codes: B60K 35/81 for controlling displays
• CPC Class Codes: G02B 2027/0112 comprising device for genereting colour display
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• CPC Class Codes: G03B 21/008 using micromirror devices
• CPC Class Codes: G03B 21/2033 LED or laser light sources
• CPC Class Codes: G03B 21/2053 Intensity control of illuminating light controlled by video signal processing H04N5/74 or H04N9/31
• CPC Class Codes: G03B 33/12 using beam-splitting or beam-combining systems, e.g. dichroic mirrors
• CPC Class Codes: H01S 5/005 Optical components external to the laser cavity, specially adapted therefor, e.g. for homogenisation or merging of the beams or for manipulating laser pulses, e.g. pulse shaping H01S5/026, H01S5/18388 take precedence
• CPC Class Codes: H01S 5/06216 Pulse modulation or generation
• CPC Class Codes: H01S 5/06835 Stabilising during pulse modulation or generation
• CPC Class Codes: H01S 5/4012 Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms
• CPC Class Codes: H01S 5/4093 Red, green and blue [RGB] generated directly by laser action or by a combination of laser action with nonlinear frequency conversion
• CPC Class Codes: H04N 9/3135 Driving therefor
• CPC Class Codes: H05B 47/105 : in response to determined parameters

Abstract

A projecting device is provided, including a light source and a controller. The light source includes a plurality of light-emitting parts each of which outputs a light beam of a color component different from each other. The controller controls an output of the light source. In addition, the controller pulse-drives the light-emitting part having a lowest output among the light-emitting parts based on that the light beams are respectively driven with a predetermined output.

Claims

1. A projecting device, comprising:

a light source, including a plurality of light-emitting parts each of which outputs a light beam of a color component different from each other; and

a controller, controlling an output of the light source,

wherein the controller pulse-drives the light-emitting part having a lowest output among the light-emitting parts based on that the light beams are respectively driven with a predetermined output.

2. The projecting device according to claim 1, wherein the controller continuously drives at least one of the plurality of the light-emitting parts other than the light-emitting part having the lowest output.

3. The projecting device according to claim 1, wherein the controller pulse-drives the light-emitting parts respectively having the lowest output and a second lowest output among the light-emitting parts based on that the light beams are respectively driven to have the predetermined output.

4. The projecting device according to claim 3, wherein the controller pulse-drives the light-emitting parts respectively having the lowest output and the second lowest output with different duty ratios.

5. The projecting device according to claim 3, wherein the controller pulse-drives the light-emitting parts respectively having the lowest output and the second lowest output with different duty ratios in a manner that a ratio of a maximum value and a minimum value of an average output is approximately equal.

6. The projecting device according to claim 1, wherein the controller makes minimum values of usable outputs of the plurality of light-emitting parts closer.

7. The projecting device according to claim 1, wherein each of the plurality of light-emitting parts comprises a sensor detecting a temperature thereof.

8. The projecting device according to claim 7, wherein the controller changes a peak power and a duty ratio of the at least one of the plurality of the light emitting parts based on the temperature detected by the sensor.

9. The projecting device according to claim 8, wherein the controller changes the peak power and the duty ratio every a predetermined time.

10. The projecting device according to claim 8, wherein the controller changes the peak power and the duty ratio by a look-up table.

11. The projecting device according to claim 8, wherein the controller controls average outputs of the plurality of the light emitting parts to be the same as average outputs at a predetermined temperature.

12. The projecting device according to claim 11, wherein the average output comprises a maximum average output and a minimum average output.

13. The projecting device according to claim 1, wherein the color components are a red component, a green component and a blue component.

14. The projecting device according to claim 13, wherein the light-emitting part having the lowest output is the light-emitting part of the blue component.

15. The projecting device according to claim 13, wherein the light-emitting part having the second lowest output is the light-emitting part of the green component.