Projection-type display apparatus and control method for projection-type display apparatus as well as control program for projection-type display apparatus

• US 20070121077A1
• Filed: 01/30/2007
• Published: 05/31/2007
• Est. Priority Date: 02/04/2004
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Miyazawa, Yasunaga, Hasegawa, Hiroshi
• Granted Patent: US 7,377,654 B2
• Time in Patent Office: Days
• US Class Current: 353/30
• CPC Class Codes: G02B 26/0833 the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD G02B26/0825 takes precedence; micromechanical devices in general B81B
• CPC Class Codes: H04N 9/315 Modulator illumination systems general applications of lighting devices F21V; general optical systems G02B; lamp houses for projectors not peculiar to the presence of an electronic spatial light modulator G03B21/20
• CPC Class Codes: H04N 9/3197 using light modulating optical valves

Abstract

Exemplary embodiments provide a projection-type display apparatus, which can address or realize a reduction in weight and size, a reduction in power consumption, and a reduction in noise, and address or realize a reduction in price, and a control method for the projection-type display apparatus, as well as a control program for the projection-type display apparatus. The projection-type display apparatus includes a solid-state light source that emits light, a mirror device that controls an emitting direction of the incident light to thereby subject the incident light to temporal modulation, and a projecting device that projects the modulated light.

Claims

1. A projection-type display apparatus, comprising:

a solid-state light source array that includes solid-state light sources emitting light;

a mirror device that controls an emitting direction of the light incident from the solid-state light source array to thereby subject the incident light to temporal modulation; and

a projecting device that projects the modulated light.

2. The projection-type display apparatus according to claim 1, the solid-state light source array being a solid-state light source array including solid-state light sources emitting lights of different colors.

3. The projection-type display apparatus according to claim 1,

the projection-type display apparatus including a measuring device that measures an intensity of emitted light from the mirror device and calculates a correction coefficient to correct the intensity of emitted light to a predetermined intensity on the basis of the intensity of the emitted light measured by the measuring device, and

the mirror device being driven on the basis of the correction coefficient.

4. The projection-type display apparatus according to claim 3,

the mirror device being formed by an arrangement of micro-mirrors that reflect incident light,

a correction coefficient being calculated for each of the micro-mirrors, and

the mirror device being driven for each of the micro-mirrors on the basis of the correction coefficient.

5. The projection-type display apparatus according to claim 3, the measuring device being arranged detachably insertable on a light path between the mirror device and the projecting device.

6. The projection-type display apparatus according to claim 3,

the projection-type display apparatus including a light guiding device, which guides modulated light emitted from the mirror device to the projecting device, between the mirror device and the projecting device, and

the measuring device and the projecting device being arranged to be replaceable with each other.

7. The projection-type display apparatus according to claim 3,

the projection-type display apparatus including a reflecting plate, which reflects modulated light emitted from the mirror device to the projecting device, between the mirror device and the projecting device,

the reflecting plate being a light-transmissive reflecting plate that transmits a part of incident light, and

the measuring device being arranged in a position where the measuring device is capable of measuring the light transmitted through the reflecting plate.

8. The projection-type display apparatus according to claim 3,

the projection-type display apparatus including an absorbing member that absorbs emitted light not made incident on the projecting device in the emitted light from the mirror device, and

the measuring device and the absorbing member being arranged to be replaceable with each other.

9. The projection-type display apparatus according to claim 8, the measuring device also functioning as the absorbing member.

10. The projection-type display apparatus according to claim 3,

the projection-type display apparatus including an absorbing member that absorbs emitted light not made incident on the projecting device in the light emitted from the mirror device, and

the measuring device being arranged to be detachably insertable on a light path between the mirror device and the absorbing member.

11. A control method for a projection-type display apparatus that includes a solid-state light source array including solid-state light sources emitting light, a mirror device that controls an emitting direction of light made incident from the solid-state light source array to thereby subject the incident light to temporal modulation, and a projecting device that projects the modulated light, the method comprising:

measuring an intensity of the modulated light emitted from the mirror device;

calculating a correction coefficient to correct the intensity of the modulated light to a predetermined intensity; and

controlling to drive the mirror device on the basis of the calculated correction coefficient.