Image display device and display apparatus
First Claim
Patent Images
1. An image display device, comprising:
- an image forming section comprising a light source configured to generate light, wherein the light source comprises a GaN-based semiconductor laser element;
an optical section configured to input and output light that is output from the image forming section, the optical section comprising;
a light guide plate configured to output light after input light is propagated inside the light guide plate by total reflection,a first deflector configured to deflect at least part of the light input to the light guide plate, to totally reflect the light input to the light guide plate inside the light guide plate, anda second deflector including a diffraction grating member configured to deflect the light propagated inside the light guide plate by total reflection, to output, from the light guide plate, the light propagated inside the light guide plate by total reflection;
a temperature measuring section configured to measure a temperature of the image forming section; and
control circuitry configured to modify;
based on a result of a temperature measurement by the temperature measurement section, a display position encoded in an image signal provided to the image forming section when the result of the temperature measurement is outside of a predetermined range; and
control a current supplied to the semiconductor laser element to thus control a wavelength of the semiconductor laser element based on the temperature measurement.
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Abstract
An image display device includes an image forming unit, an optical unit, a temperature measuring unit, and a control unit. The optical unit is configured to input and output light that is output from the image forming unit. The temperature measuring unit is configured to measure a temperature of the image forming unit. The control unit is configured to control an operation of the image forming unit based on a result of a temperature measurement by the temperature measuring unit.
77 Citations
14 Claims
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1. An image display device, comprising:
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an image forming section comprising a light source configured to generate light, wherein the light source comprises a GaN-based semiconductor laser element; an optical section configured to input and output light that is output from the image forming section, the optical section comprising; a light guide plate configured to output light after input light is propagated inside the light guide plate by total reflection, a first deflector configured to deflect at least part of the light input to the light guide plate, to totally reflect the light input to the light guide plate inside the light guide plate, and a second deflector including a diffraction grating member configured to deflect the light propagated inside the light guide plate by total reflection, to output, from the light guide plate, the light propagated inside the light guide plate by total reflection; a temperature measuring section configured to measure a temperature of the image forming section; and control circuitry configured to modify;
based on a result of a temperature measurement by the temperature measurement section, a display position encoded in an image signal provided to the image forming section when the result of the temperature measurement is outside of a predetermined range; and
control a current supplied to the semiconductor laser element to thus control a wavelength of the semiconductor laser element based on the temperature measurement. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display apparatus, comprising:
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a frame mounted onto a head of an observer; and an image display device attached to the frame, the image display device including an image forming section comprising a light source configured to generate light, wherein the light source comprises a GaN-based semiconductor laser element, an optical section configured to input and output light that is output from the image forming section, the optical section comprising; a light guide plate configured to output light after input light is propagated inside the light guide plate by total reflection, a first deflector configured to deflect at least part of the light input to the light guide plate, to totally reflect the light input to the light guide plate inside the light guide plate, and a second deflector including a diffraction grating member configured to deflect the light propagated inside the light guide plate by total reflection, to output, from the light guide plate, the light propagated inside the light guide plate by total reflection a temperature measuring section configured to measure a temperature of the image forming section, and control circuitry configured to modify;
based on a result of a temperature measurement by the temperature measurement section, a display position encoded in an image signal provided to the image forming section when the result of the temperature measurement is outside of a predetermined range; and
control a current supplied to the semiconductor laser element to thus control a wavelength of the semiconductor laser element based on the temperature measurement.
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9. An image display device, comprising:
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an image forming section including a liquid crystal display section, and a light source configured to generate light, wherein the light source comprises a GaN-based semiconductor laser element; an optical section configured to input and output light that is output from the image forming section, the optical section comprising; a light guide plate configured to output light after input light is propagated inside the light guide plate by total reflection, a first deflector configured to deflect at least part of the light input to the light guide plate, to totally reflect the light input to the light guide plate inside the light guide plate, and a second deflector including a diffraction grating member configured to deflect the light propagated inside the light guide plate by total reflection, to output, from the light guide plate, the light propagated inside the light guide plate by total reflection; a temperature measuring section configured to measure a temperature of the light source; and control circuitry configured to;
modify, based on a result of a temperature measurement by the temperature measurement section, a display position encoded in an image signal provided to the image forming when the result of the temperature measurement is outside of a predetermined range; and
control a current supplied to the semiconductor laser element to thus control a wavelength of the semiconductor laser element based on the temperature measurement. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification