Projection display device
A projection display device including a first panel that generates a first image, a second panel that generates a second image, a prism that combines the first image with the second image shifted in a horizontal direction with respect to a first pixel and outputs a combination image, a light path shift element, and a display control circuit. The display control circuit supplies data signals of odd-numbered rows to the first panel and supplies data signals of even-numbered rows to the second panel in an odd-numbered field period, and supplies data signals of even-numbered rows to the first panel and supplies data signals of even-numbered rows to the second panel in an even-numbered field period, and controls the light path shift element so that a light path of the combination image is shifted in a vertical direction.
1 . A projection display device comprising:
a first image light emission device configured to emit first image light;
a second image light emission device configured to emit second image light;
an optical combination system configured to combine the first image light with the second image light in a state in which the second image light is shifted in a first direction relative to the first image light, and emit combination light,
a light path shift element configured to shift a light path for the combination light emitted from the optical combination system; and
a display control circuit configured to control the first image light emission device, the second image light emission device, and the light path shift element, wherein
one frame period includes a first field period and a second field period,
the display control circuit
supplies a data signal of a video pixel aligned in the first direction at an odd-numbered position in a second direction intersecting the first direction in video pixel data among data signals corresponding to gradation levels designated by the video pixel data arranged in a matrix to the first image light emission device, supplies a data signal of the video pixel aligned in the first direction at an even-numbered position in the second direction in the video pixel data to the second image light emission device, and controls the light path shift element so that the light path is set as a reference position in the first field period, and
supplies a data signal of the video pixel aligned in the first direction at an even-numbered position in the second direction in the video pixel data to the first image light emission device, supplies a data signal of the video pixel aligned in the first direction at an odd-numbered position in the second direction in the video pixel data to the second image light emission device, and controls the light path shift element so that the light path is shifted in the second direction intersecting the first direction in the second field period, and
the first image light emission device emits the first image light based on the supplied data signal, and the second image light emission device emits the second image light based on the supplied data signal.
2 . The projection display device according to claim 1 , wherein
in the optical combination system, an amount of shift of the second image light in the first direction relative to the first image light is 0.5 pixels of the pixel in the first image light or the second image light, and
an amount of shift of the light path in the light path shift element is 0.5 pixels.
3 . The projection display device according to claim 2 , wherein
the first image light emission device includes
a first liquid crystal panel,
a first light source configured to emit light toward the first liquid crystal panel, and
a first polarization conversion member configured to convert the light emitted by the first light source into first polarized light,
the first polarized light is incident on the first liquid crystal panel,
the second image light emission device includes
a second liquid crystal panel,
a second light source configured to emit light toward the second liquid crystal panel, and
a second polarization conversion member configured to convert the light emitted by the second light source into second polarized light, and
the second polarized light is incident on the second liquid crystal panel.
4 . The projection display device according to claim 3 , wherein
each of the first light source and the second light source is a laser light source that emits first light including a wavelength range of red, second light including a wavelength range of green, and third light including a wavelength range of blue.
5 . The projection display device according to claim 3 , wherein
the first liquid crystal panel in the first image light emission device generates images of light components of a first color, a second color, and a third color in positive polarity writing and negative polarity writing, and
the second liquid crystal panel in the second image light emission device generates the images of the light components of the first color, the second color, and the third color in positive polarity writing and negative polarity writing.
6 . The projection display device according to claim 5 , wherein
when the first liquid crystal panel generates image light of the light component of the first color, the second liquid crystal panel generates image light of the light component of the second color,
and when the first liquid crystal panel generates the image light of the light component of the second color, the second liquid crystal panel generates the image light of the light component of the first color.
7 . The projection display device according to claim 3 , wherein
in the first field period and the second field period,
the first image light emission device generates a light component of a first color, a light component of a second color, and a light component of a third color having different wavelengths in the first image light in a time-division manner, and
the second image light emission device generates a light component of the first color, a light component of the second color, and a light component of the third color in the second image light in a time-division manner.
8 . The projection display device according to claim 2 , wherein
the first image light emission device includes
a first self-emitting panel including sub-pixels corresponding to a first color, a second color, and a third color having different wavelengths, and configured to emit the first image light; and
a first polarization conversion member configured to convert the light emitted from the first self-emitting panel into the first polarized light, and
the second image light emission device includes
a second self-emitting panel including sub-pixels of the first color, the second color, and the third color, and configured to emit the second image light; and
a second polarization conversion member configured to convert the light emitted from the second self-emitting panel into the second polarized light.