WHITE FLASH GENERATION FROM A LIGHT EMITTING DIODE (LED) PROJECTOR

• US 20170219915A1
• Filed: 07/31/2014
• Published: 08/03/2017
• Est. Priority Date: 07/31/2014
• Status: Active Application

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Mueller, Robert L, Chousal, Ivan Dejesus, Wynne, Ben
• Application Number:
  US15/500,652
• Publication Number:
  US 20170219915A1
• Time in Patent Office: Days
• CPC Class Codes: F21V 23/0407 for flashing
• CPC Class Codes: F21V 33/0052 Audio or video equipment, e.g. televisions, telephones, cameras or computers; Remote control devices therefor
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G03B 15/05 Combinations of cameras with electronic flash apparatus; Electronic flash units
• CPC Class Codes: G03B 17/54 with projector
• CPC Class Codes: G03B 21/2013 Plural light sources
• CPC Class Codes: G03B 21/2033 LED or laser light sources
• CPC Class Codes: G03B 21/28 Reflectors in projection beam in illumination beam G03B21/2066

Abstract

A method for generating white flash from a Light Emitting Diode (LED) projector coupled to a computing system is described. The method includes receiving an input to switch projection mode of the LED projector to a white-light mode of projection, where the input is one of a direct user input and an indirect input. The method also includes switching the LED projector to the white-light mode of projection from a first projection mode based on the received input; and actuating, simultaneously, all LEDs of the LED projector to generate a white flash of light in the white-light mode of projection.

Claims

1. A method for generating white flash from a Light Emitting Diode (LED) projector coupled to a computing system, the method comprising:

receiving an input to switch projection mode of the LED projector to a white-light mode of projection, wherein the input is one of a direct user input and an indirect input;

switching the LED projector to the white-light mode of projection from a first projection mode based on the received input, wherein the LED projector operates on one or more projection modes; and

actuating, simultaneously, all LEDs of the LED projector to generate a white flash of light in the white-light mode of projection.

2. The method as claimed in claim 1, wherein the method further comprises switching the LED projector back to the first projection mode from the white-light mode of projection, after a predetermined time period.

3. The method as claimed in claim 1, wherein the method further comprises switching the LED projector back to the first projection mode from the white-light mode of projection, based on occurrence of a trigger.

4. The method as claimed in claim 1, wherein the indirect input is received through the computing system, and wherein the computing system receives the indirect input through a touch gesture made by the user on a projection surface of the LED projector.

5. The method as claimed in claim 1, wherein the white flash of light is generated in a pattern to form strobes of white light, wherein the pattern is based on predefined strobe parameters.

6. The method as claimed in claim 1, wherein the all LEDs of the LED projector includes at least one red LED, at least one green LED, and at least one blue LED.

7. A projection system for generation of white flash from a LED projector, the projection system comprising:

a computing system;

the LED projector coupled to the computing system comprising a white flash generation module to;

receive an input from the computing device to switch projection mode of the LED projector to a white-light mode of projection;

switch the LED projector to the white-light mode of projection from a first projection mode based on the received input, wherein the LED projector operates on a plurality of projection modes;

actuate, simultaneously, at least one red LED, at least one green LED, and at least one blue LED from amongst all LEDs of the LED projector to generate a white flash of light in the white-light mode of projection; and

switch the LED projector back to the first projection mode from the white-light mode of projection, based on occurrence of a trigger.

8. The projection system as claimed in claim 7, wherein actuation of the at least one red LED, the at least one green LED, and the at least one blue LED from amongst all the LEDs is to generate an increased illuminance of projected light by the LED projector.

9. The projection system as claimed in claim 7 further comprising an image capturing device coupled to the computing system to capture images during the white-light mode of projection.

10. The projection system as claimed in claim 7 further comprising a projection surface to project light emitted by the LED projector, wherein the projection surface is one of a passive projection surface and an active projection surface to receive the input.

11. The projection system as claimed in claim 7, wherein the trigger is an external input from the user.

12. A LED projector coupled to a computing system for generation of white flash, the LED projector comprising:

at least one red LED;

at least one green LED;

at least one blue LED;

a LED driving circuit coupled to the at least one red LED, the at least one green LED, and the at least one blue LED, comprising a white flash generation module to;

identify the LED projector to be operating in white-light mode of projection; and

actuate simultaneously, at least one red LED, at least one green LED, and at least one blue LED from amongst all LEDs of the LED projector to generate a white flash of light in the white-light mode of projection.

13. The LED projector as claimed in claim 12, wherein the white flash generation module further switches the LED projector to a first projection mode from the white-light mode of projection.

14. The LED projector as claimed in claim 13, wherein the switching is based on a predefined time period.

15. The LED projector as claimed in claim 12, wherein the white flash generation module actuates the at least one red LED, the at least one green LED, and the at least one blue LED in a pattern to generate strobe of white light, and wherein the pattern is based on predefined strobe parameters.