Seiko Epson Corporation

Toru Aoki

Kazuhisa Mizusako

Yusuke Komuro

Hiroyuki Hosaka

Keijiro Naito

Daigo Hokazono

Kenya Ishii

Shinichi Wakabayashi

Akihide Haruyama

Hiroaki Mochizuki

Noriaki Miyasaka

Masatoshi Ito

Chiharu Kaburagi

Mamoru Kobayashi

Sadasumi Uchiyama

Nobuyuki Shimotome

Yasuji Yamazaki

Ai Koike

A projection-type display apparatus includes a liquid crystal panel, an optical path shift element, and a display control circuit that controls the liquid crystal panel and the optical path shift element. When a difference in gray scale level between pixel data corresponding to a panel pixel pand pixel data corresponding to a panel pixel p, the panel pixel pand the panel pixel pbeing two adjacent pixels, is equal to or larger than a threshold in a unit period-for example, the display control circuit corrects at least one of a gray scale level of a video pixel corresponding to the panel pixel pin a previous unit period-or a gray scale level of a video pixel corresponding to the panel pixel pin a unit period-to reduce a difference in luminance between the panel pixels.

Projection-type display apparatus

A projection-type display apparatus including a liquid crystal panel including a plurality of panel pixels, an optical path shifting element configured to shift a position of a projection pixel for each of unit periods, included in one frame period, and a display control circuit configured to control the liquid crystal panel and the optical path shifting element. The display control circuit supplies a data signal to the plurality of panel pixels per the unit period, supplies a signal based on pixel data, as the data signal, to a peripheral panel pixel arranged at a periphery among the plurality of panel pixels in a unit period as a part in one frame period, and supplies a signal having a gray scale level equal to or less than a threshold value as the data signal in a unit period other than the unit period as the part in the one frame period.

Projection-type display apparatus and method for controlling projection-type display apparatus

A projection type display apparatus includes a liquid crystal panel including a first panel pixel, a liquid crystal panel including a second panel pixel, an optical path shift element that shifts projection positions of the first panel pixel and the second panel pixel, and a display control circuit that controls the liquid crystal panel and the optical path shift element. The display control circuit causes the optical path shift element to shift the projection position from a first unit period to a fourth unit period of one frame period for each unit period. A centroid of a path on which the first panel pixel is projected from the first unit period to the fourth unit period is different from a centroid of a path on which the second panel pixel is projected from the first unit period to the fourth unit period.

Projection type display apparatus

A projection-type display apparatus includes a liquid crystal panel including a panel pixel, an optical path shifting element that shifts a projected pixel projected from the panel pixel, and a display control circuit that controls the liquid crystal panel and the optical path shifting element. The display control circuit supplies, to the liquid crystal panel, the same data signal and controls the projected pixel to be at a same position in each of a unit period f-and a unit period f-, and controls the optical path shifting element to cause a shift direction from the projected pixel before the shift toward the projected pixel after the shift from a unit period f-to a unit period f-to be opposite to the shift direction from the projected pixel before the shift toward the projected pixel after the shift from a unit period f-to a unit period f-

A projection-type display apparatus includes a liquid crystal panel including a panel pixel, an optical path shifting element that shifts a projected pixel projected from the panel pixel, and a display control circuit that controls the liquid crystal panel and the optical path shifting element. The display control circuit supplies, to the liquid crystal panel, the same data signal and controls the projected pixel to be at a same position in a unit period f-and a unit period f-period, and controls the optical path shifting element to cause the position of the projected pixel in each of a unit period f-to a unit period f-, to be different from the position of the projected pixel in a respective one of a unit period f-to a unit period f-

A projector including an electro-optical panel in which a plurality of pixels are arrayed, an optical path shifting element configured to change an optical path of light emitted from the plurality of pixels, and a control circuit configured to control a state of the optical path shifting element such that light emitted from a predetermined pixel among the plurality of pixels reaches a first position on a display screen in the first unit period, control a state of the optical path shifting element such that light emitted from the predetermined pixel reaches a second position on the display screen in the second unit period, and control a state of the optical path shifting element in a transition period in which a unit period transitions from the first unit period to the second unit period based on a type of image indicated by an input image signal.

Projector and control method for projector

In an electro-optical device, a first polarizing element, a first phase difference element, a transmissive liquid crystal panel, a second phase difference element, and a second polarizing element are sequentially arranged. Here, when a phase difference of the first phase difference element and the second phase difference element is λ/4, an influence of orientation disorder of liquid crystal molecules can be alleviated, but a contrast ratio is reduced. Therefore, when a wavelength of incident light is λ, a phase difference R of the first phase difference element and the second phase difference element satisfies the following condition that 0<R<λ/4, preferably λ/12<R<λ/6. For example, it is assumed that the phase difference R is λ/8.

Electro-optical device, electronic apparatus, and projector

A projector includes: an electro-optical panel including a plurality of pixels; an optical-path shift element configured to change an optical path of light emitted from the plurality of pixels; and an image processing circuit configured to, in a unit period, supply an image signal to the plurality of pixels in an order, the unit period being included in one frame period for displaying an image of one frame indicated by an input image signal, the image signal corresponding to the plurality of pixels and being generated on a basis of the input image signal, in which the image processing circuit includes an adjustment circuit configured to adjust a response velocity of the plurality of pixels when the image displayed by the electro-optical panel is switched, on a basis of an order of supply of the image signal or of a position of a pixel at the electro-optical panel.

Projector having adjustment circuit and method of controlling projector

When, in a liquid crystal projector, optical responsiveness of a liquid crystal panel corresponding to G is better than optical responsiveness of a liquid crystal panel corresponding to R, a display control circuit performs a tr correction and a tf correction of overdrive processing for R, and performs only the tr correction of the overdrive process for G, and does not perform the tf correction for G. The display control circuit performs a black floating process for R, G, and B.

Liquid crystal projector

A liquid crystal projector includes a liquid crystal panel configured to generate a modulated image, a sensor configured to detect a temperature of the liquid crystal panel, an optical shift element configured to shift an emission optical path of the modulated image generated by the liquid crystal panel, and a control circuit configured to control a velocity of a shift in the optical shift element according to the temperature detected by the sensor.

Liquid crystal projector and method for controlling liquid crystal projector

A liquid crystal projector includes a red liquid crystal panel, a green liquid crystal panel, a blue liquid crystal panel, a green liquid crystal panel, an optical shift element configured to shift an emission optical path of a synthesized image of each liquid crystal panel, and a control circuit configured to control these. The control circuit controls the optical shift element to set a projection position to a projection position (A) in a subframe fand to a projection position (B) in a subframe f. The control circuit causes a resolution of the liquid crystal panel expressed in the subframes fand fto be lower than the resolution of the liquid crystal panel expressed in the subframes fand f

In a liquid crystal projector, in a first liquid crystal panel corresponding to a first color, a gray scale level specified by video data specifies a first value in a first field, and a second value in a second field subsequent to the first field, and in a second liquid crystal panel corresponding to a second color, a gray scale level specified by the video data specifies the first value in the first field, and the second value in the second field. When optical responsiveness of the first liquid crystal panel is better than optical responsiveness of the second liquid crystal panel, in the second field, a liquid crystal voltage applied to the first liquid crystal panel is smaller than a liquid crystal voltage applied to the second liquid crystal panel.

An electro-optical device includes a display panel including a liquid crystal layer interposed between a pair of substrates, and in the electro-optical device, a normal display mode and a refresh mode serving as a specific display mode in which the display panel is set to have a predefined temperature higher than ordinary temperature and lower than an Ni point of the liquid crystal layer and is energized in display where brightness becomes homogeneous in a screen are selectable.

Electro-optical device, and projection-type display apparatus

An electro-optical device includes configuration to apply, to a plurality of the data lines through capacitors, inverted data signals that are generated by inverting voltage levels of data signals supplied to image signal lines with respect to a predetermined electric potential.

Electro-optical device and electronic apparatus

An electro-optical device includes a plurality of scanning lines that extends in a row direction, a plurality of data lines that extends in a column direction, a plurality of pixels which are provided at intersections of the scanning lines and the data lines and whose gray-scale levels are designated by data signals supplied through the data lines, a common electrode that is provided so as to be opposite to pixel electrodes, a shift register that outputs sampling signals to sequentially select a plurality of blocks each composed of a plurality of the data lines, in a period where the scanning lines are selected, a sampling circuit that samples the data signals to the plurality of data lines belonging to the block selected by the sampling signal, respectively, a data signal supply circuit that changes the potential of the data signal into a higher level and a lower level than a predetermined potential in every predetermined period and then alternately outputs the potentials, and a correction circuit that superimposes, on the data signals, correction signals for correcting potential errors that are generated in the data lines belonging to each of the blocks, corresponding to the potentials of the data lines.

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Shiojiri, Japan

Toru Aoki