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

• US 8,777,425 B2
• Filed: 09/07/2010
• Issued: 07/15/2014
• 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
• Primary Examiner(s): FULLER, RODNEY EVAN
• Application Number:
  US12/876,766
• Publication Number:
  US 20100328552A1
• Time in Patent Office: 1,407 Days
• Field of Search: 353/98
• US Class Current: 353/98
• 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 emits light;

a mirror device that controls an emitting intensity of the light incident from the solid-state light source array to thereby subject the incident light to temporal modulation, the mirror device including micro-mirrors arranged in a matrix shape;

a correction parameter storing unit that stores correction parameters, which control an effective reflection time of the micro-mirrors in a plurality of color lights emitted from the solid-state light source array;

a mirror device driver that drives the micro-mirrors based on a modulation control signal, the modulation control signal being based on a video signal and the correction parameters;

a power supply control unit that controls the turning on and off of the solid-state light source array based on the video signal and the correction parameters;

a projecting device that projects the modulated light; and

a measuring device that measures an intensity of emitted ineffective light from the mirror device, the measuring device being disposed on a light path between the solid-state light source array and the projecting device,

wherein

the solid-state light source array is configured to be turned on at a time after the micro-mirrors are turned on, and the modulation control signal is turned off at a predetermined time after the solid-state light source array is turned on, and the solid-state light source array is thereby turned off, and

the projecting device receives light other than the ineffective light.

2. A projection-type display apparatus according to claim 1,

the correction parameter storing unit calculating a correction coefficient to correct the intensity of emitted light to a predetermined intensity based on the intensity of the emitted light, and

the mirror device being driven based on the correction coefficient.

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

the correction parameters being determined based on ineffective light emitted by the micro-mirrors and incident on the measuring device.

4. A projection-type display apparatus, comprising:

a solid-state light source array that emits light;

a mirror device that controls an emitting intensity of the light incident from the solid-state light source array to thereby subject the incident light to temporal modulation, the mirror device includes micro-mirrors arranged in a matrix shape;

a correction parameter storing unit that stores correction parameters, which control an effective reflection time of the micro-mirrors in a plurality of color lights emitted from the solid-state light source array;

a control unit that outputs a modulation control signal based on a video signal and correction parameters to control the temporal modulation by the mirror device;

a mirror device driver that drives the plurality of micro-mirrors based on the outputted modulation control signal;

a power supply control unit that controls the turning on and off of the solid-state light source array based on the video signal and the correction parameters;

an A/D conversion unit that converts an analog signal into a digital signal;

a projecting device that projects the modulated light; and

a measuring device that measures an intensity of emitted ineffective light from the mirror device, the measuring device being disposed on a light path between the solid-state light source array and the projecting device,

wherein

the video signal is inputted to the control unit via the A/D conversion unit in the case the video signal is the analog signal, the video signal is inputted to the control unit directly in the case the video signal is the digital signal,

the solid-state light source array is configured to be turned on at a time after the micro-mirrors are turned on, and the modulation control signal is turned off at a predetermined time after the solid-state light source array is turned on, and the solid-state light source array is thereby turned off, and

the projecting device receives light other than the ineffective light.

5. A projection-type display apparatus according to claim 4, further comprising:

a decoder that decodes the video signal in the case the video signal is compressed data.

6. A projection-type display apparatus according to claim 4,

the correction parameter storing unit calculating a correction coefficient to correct the intensity of emitted light to a predetermined intensity based on the intensity of the emitted light, and

the mirror device being driven based on the correction coefficient.