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

• US 9,140,899 B2
• Filed: 06/10/2014
• Issued: 09/22/2015
• 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:
  US14/301,117
• Publication Number:
  US 20140320949A1
• Time in Patent Office: 469 Days
• Field of Search: 353/98
• US Class Current: 1/1
• 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 light source that emits light;

a mirror device that modulates incident light from the light source;

a projecting device that projects the modulated light;

a reflecting plate disposed between the light source and the projecting device;

a measuring device that measures an intensity of light transmitted from the reflecting plate;

a controller that controls the projection-type display apparatus based on the intensity of light measured by the measuring device;

a parameter storing unit that stores correction parameter based upon the intensity of light measured by the measuring device; and

a light source controller that controls the light source,

wherein the controller generates a modulation control signal based upon a video signal inputted to the projection-type display apparatus and the correction parameter stored in the correction parameter storing unit,

wherein the controller generates a light control signal based upon the video signal inputted to the projection-type display apparatus and the correction parameter stored in the correction parameter storing unit,

wherein the mirror device modulates the incident light from the light source based upon the modulation control signal, and

wherein the light source controller controls the light source based upon the light control signal.

2. The projection-type display apparatus according to claim 1, wherein the light source is a solid-state light source array.

3. The projection-type display apparatus according to claim 2, wherein the solid-state light source array includes solid-state light sources emitting lights of different colors.

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

the mirror device is formed by an arrangement of micro-mirrors that reflect the incident light.

5. The projection-type display apparatus according to claim 1, wherein:

the reflecting plate reflects modulated light emitted from the mirror device to the projecting device, between the mirror device and the projecting device,

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

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

6. A control method for a projection-type display apparatus that includes a light source that emits light, a mirror device that modulates incident light from the light source, and a projecting device that projects the modulated light, the method comprising:

measuring an intensity of light transmitted a reflecting plate, the reflecting plate being disposed between the light source and the projection device;

controlling the projection-type display apparatus based upon the intensity of light measured,

storing a correction parameter based upon the intensity of light measured by the measuring device; and

controlling the light source,

generating a modulation control signal based upon a video signal inputted to the projection-type display apparatus and the stored correction parameter,

generating a light control signal based upon the video signal inputted to the projection-type display apparatus and the stored correction parameter,

modulating the incident light from the light source based upon the modulation control signal, and

controlling the light source based upon the light control signal.