Projection display system and method of controlling projection display device

• US 10,011,177 B2
• Filed: 08/04/2017
• Issued: 07/03/2018
• Est. Priority Date: 02/23/2015
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Fujita, Koudai
• Primary Examiner(s): Chowdhury, Sultan
• Application Number:
  US15/668,702
• Publication Number:
  US 20170334291A1
• Time in Patent Office: 333 Days
• CPC Class Codes: B60K 2360/334 Projection means
• CPC Class Codes: B60K 2360/349 Adjustment of brightness
• CPC Class Codes: B60K 35/00 Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
• CPC Class Codes: B60K 35/23 Head-up displays [HUD] optical aspects of head-up displays G02B27/01
• CPC Class Codes: G02B 2027/0118 comprising devices for improving the contrast of the display / brillance control visibility
• CPC Class Codes: G02B 27/01 Head-up displays
• CPC Class Codes: G02B 27/0101 characterised by optical features G02B27/0172 takes precedence
• 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 21/206 Control of light source other than position or intensity
• CPC Class Codes: G03B 29/00 Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects combinations with flash apparatus G03B15/03
• CPC Class Codes: H04N 9/3147 Multi-projection systems displays in general H04N9/12; video walls G06F3/1446, G09G2300/026
• CPC Class Codes: H04N 9/3155 for controlling the light source light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406
• CPC Class Codes: H04N 9/3182 Colour adjustment, e.g. white balance, shading or gamut white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607
• CPC Class Codes: H04N 9/3194 including sensor feedback

Abstract

A projection display system and a control method of controlling a projection display device capable of preventing degradation of visibility or occurrence of a sense of discomfort at a boundary between respective projection areas due to dimming are provided. In a system including a plurality of projection display devices (100A, 100B, 100C) that project image light onto a plurality of areas in one projection surface, each of the plurality of projection display devices includes a brightness detection unit (47b), and a first control unit (52) that controls a projection condition for the image light that is projected on the basis of detected brightness information, and a second control unit (53) that performs control to cause a projection condition for the image light of the second projection display device (100B) to match a projection condition determined by the first control unit (52) of the first projection display device (100A).

Claims

1. A projection display system comprising:

a plurality of projection display devices that project image light onto each of a plurality of areas in one projection surface,

wherein each of the plurality of projection display devices includes a brightness detection unit that detects brightness of the area onto which the image light is projected, and a first control unit that controls a projection condition for the image light that is projected onto the area on the basis of brightness information detected by the brightness detection unit,

any one of the plurality of projection display devices is a first projection display device, and a projection display device other than the first projection display device among the plurality of projection display devices is a second projection display device,

a second control unit performs control to cause the projection condition for the image light of the second projection display device to match the projection condition determined by the first control unit of the first projection display device,

a switching unit that switches between enabling and disabling of control of the second control unit, and

a power supply control unit that individually controls power supplies of the plurality of projection display devices,

wherein the switching unit switches control of the second control unit to enabling only in a case where a power supply of the projection display device that projects image light onto an area adjacent to an area onto which the first projection display device projects image light is on by the power supply control unit.

5. The projection display system according to claim 1, wherein the projection condition includes a luminance of the image light.

8. The projection display system according to claim 1, wherein the projection condition includes a tint of the image light.

10. The projection display system according to claim 1, wherein the plurality of projection display devices includes the first projection display device, the second projection display device and a third projection display device.

12. A control method of controlling the plurality of projection display devices that project image light onto each of the plurality of areas in one projection surface of the projection display system according to claim 1, in which

each of the plurality of projection display devices includes the brightness detection unit that detects brightness of the area onto which the image light is projected, and the first control unit that controls the projection condition for the image light that is projected onto the area on the basis of brightness information detected by the brightness detection unit, and

any one of the plurality of projection display devices is the first projection display device, and the projection display device other than the first projection display device among the plurality of projection display devices is the second projection display device,

the control method comprising:

a control step of performing control to cause the projection condition for the image light of the second projection display device to match the projection condition determined by the first control unit of the first projection display device, and

a power supply control step of individually controlling power supplies of the plurality of projection display devices,

wherein the control step is executed only in a case where the power supplies of the first projection display device, and the projection display device that projects image light onto an area adjacent to an area onto which image light is projected by the first projection display device are on in the power supply control step.

15. The control method according to claim 12, wherein the projection condition includes a luminance of the image light.

17. The control method according to claim 12, wherein the projection condition includes a tint of the image light.

19. The control method according to claim 12, wherein the plurality of projection display devices includes the first projection display device, the second projection display device and a third projection display device.

2. A projection display system comprising:

a plurality of projection display devices that project image light onto each of a plurality of areas in one projection surface,

wherein the plurality of projection display devices are projection display devices mounted on a car,

each of the plurality of projection display devices includes a brightness detection unit that detects brightness of the area onto which the image light is projected, and a first control unit that controls a projection condition for the image light that is projected onto the area on the basis of brightness information detected by the brightness detection unit,

any one of the plurality of projection display devices is a first projection display device, and a projection display device other than the first projection display device among the plurality of projection display devices is a second projection display device,

a second control unit performs control to cause the projection condition for the image light of the second projection display device to match the projection condition determined by the first control unit of the first projection display device, and

the first projection display device is the projection display device that projects image light onto an area closest to a driver'"'"'s seat of the car among the plurality of areas in the projection surface.

3. The projection display system according to claim 2, further comprising:

a switching unit that switches between enabling and disabling of control of the second control unit.

4. The projection display system according to claim 3, further comprising:

a power supply control unit that individually controls power supplies of the plurality of projection display devices,

wherein the switching unit switches control of the second control unit to enabling only in a case where a power supply of a projection display device that projects image light onto an area adjacent to an area onto which the first projection display device projects image light is on by the power supply control unit.

6. The projection display system according to claim 2, wherein the projection condition includes a luminance of the image light.

7. The projection display system according to claim 3, wherein the projection condition includes a luminance of the image light.

9. The projection display system according to claim 2, wherein the projection condition includes a tint of the image light.

11. The projection display system according to claim 2, wherein the plurality of projection display devices includes the first projection display device, the second projection display device and a third projection display device.

13. A control method of controlling the plurality of projection display devices that project image light onto each of the plurality of areas in one projection surface of the projection display system according to claim 2, in which

the plurality of projection display devices are projection display devices mounted on a car, and

each of the plurality of projection display devices includes the brightness detection unit that detects brightness of the area onto which the image light is projected, and the first control unit that controls a projection condition for the image light that is projected onto the area on the basis of brightness information detected by the brightness detection unit, and

any one of the plurality of projection display devices is the first projection display device, and the projection display device other than the first projection display device among the plurality of projection display devices is the second projection display device,

the first projection display device is a projection display device that projects image light onto an area closest to the driver'"'"'s seat of the car among the plurality of areas in the projection surface,

the control method comprising:

a control step of performing control to cause the projection condition for the image light of the second projection display device to match the projection condition determined by the first control unit of the first projection display device.

14. The control method according to claim 13, further comprising:

a power supply control step of individually controlling power supplies of the plurality of projection display devices,

wherein the control step is executed only in a case where the power supplies of the first projection display device, and the projection display device that projects image light onto an area adjacent to an area onto which image light is projected by the first projection display device are on in the power supply control step.

16. The control method according to claim 13, wherein the projection condition includes a luminance of the image light.

18. The control method according to claim 13, wherein the projection condition includes a tint of the image light.

20. The control method according to claim 13, wherein the plurality of projection display devices includes the first projection display device, the second projection display device and a third projection display device.