LOW POWER PROJECTION DISPLAY DEVICES

• US 20070285344A1
• Filed: 04/27/2007
• Published: 12/13/2007
• Est. Priority Date: 07/16/2003
• Status: Active Grant

• Current Assignee: Transpacific Image LLC (Intellectual Ventures LLC)
• Original Assignee: Transpacific Image LLC (Intellectual Ventures LLC)
• Inventors: Plut, William
• Granted Patent: US 7,806,535 B2
• Time in Patent Office: Days
• US Class Current: 345/3.100
• CPC Class Codes: G03B 21/005 Projectors using an electronic spatial light modulator but not peculiar thereto
• CPC Class Codes: G03B 21/16 Cooling; Preventing overheating
• CPC Class Codes: H04N 9/3141 Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

Described herein are devices that provide projection-type video output in a portable design. The projection-type display devices include a battery that stores electrical energy. The battery increases display device portability and flexible usage by permitting display device operation in locations not serviceable by a fixed power supply. For example, inclusion of a battery extends projector-type display device usage into a car, library, remote environment, or any other setting where fixed power outlets are not readily available or within power cord reach. To increase device endurance from a finite battery power supply, the present invention may also implement one or more hardware designs that reduce power consumption.

Claims

1. A projection-type display device, comprising:

a light source for generating light;

an optical modulation device configured to selectively transmit light generated by the light source according to video data included in a video signal provided to the optical modulation device;

a projection lens system configured to output light, transmitted by the optical modulation device, along a projection path;

at least one battery that stores electrical energy; and

an electrical energy transport system configured to transmit electrical energy from the battery to the light source and to transmit electrical energy from the battery to the optical modulation device.

2. The display device of claim 1 wherein the at least one battery is rechargeable.

3. The display device of claim 1 further comprising an inlet power port adapted to receive a power cord that is configured to electrically couple the display device to an AC power source.

4. The display device of claim 1 wherein the at least one battery stores a maximum of 200 watt hours of electrical energy.

5. The display device of claim 4 wherein the at least one battery stores a maximum of 100 watt hours of electrical energy.

6. The display device of claim 1 wherein the light source comprises an array of diode lasers.

7. The display device of claim 6 wherein each diode laser in the array consumes less than about 10 watts when generating light.

8. The display device of claim 1 further comprising a fan that moves cooling air through internal portions of the display device and receives electrical energy from the battery via the electrical energy transport system.

9. The display device of claim 1 wherein the display device weighs less than 2.5 pounds.

10. The display device of claim 1 wherein the display device is configured to consume less than about 50 watt s when producing light and projecting an image.

11. A display device, comprising:

a base that includes a) a housing, b) a light source within the housing for generating light, and c) at least one battery within the housing that stores electrical energy;

a projection chamber that includes a) a projection chamber housing, b) an optical modulation device configured to selectively transmit light generated by the light source according to video data included in a video signal provided to the optical modulation device, and c) a projection lens system for outputting light, transmitted by the optical modulation device, along a projection path;

a positional interface, coupled to the base and coupled to the projection chamber, that allows the projection chamber to be moved relative to the base and allows the projection chamber to maintain a constant position relative to the base after being moved; and

an electrical energy transport system configured to transmit electrical energy from the at least one battery to the light source and to transmit electrical energy from the at least one battery in the base, through the positional interface, and to the optical modulation device in the projection chamber.

12. The display device of claim 11 wherein the at least one battery is rechargeable.

13. The display device of claim 11 further comprising an inlet power port adapted to receive a power cord that is configured to electrically couple the display device to an AC power source.

14. The display device of claim 11 wherein the at least one battery stores a maximum of 200 watt hours of electrical energy.

15. The display device of claim 14 wherein the at least one battery stores a maximum of 100 watt hours of electrical energy.

16. The display device of claim 11 wherein the light source comprises an array of diode lasers.

17. The display device of claim 16 wherein each diode laser in the array consumes less than about 10 watts when generating light.

18. The display device of claim 11 wherein the display device weighs less than 2.5 pounds.

19. The display device of claim 11 further comprising at least one fiber optic cable having a first end in the base and a second end in the projection chamber.

20. The display device of claim 11 wherein the display device is configured to consume less than about 50 watt s when producing light and projecting an image.