Seiko Epson Corporation

Hiroshi Yoshimoto

Tadashi Yamada

Hirosada Horiguchi

Keiji Fukuhara

A control circuit () performs a first process in which it is controlled so that power is supplied to a liquid crystal panel (AA) from a power generation circuit (), and a second process in which it is controlled so that the liquid crystal panel (AA) is driven based on an internal vertical synchronizing signal (Vs) of which a frequency is higher than that of an external vertical synchronizing signal (Vs), and a video center voltage (Dref) is applied to each pixel electrode () of the liquid crystal panel (AA), and performs a control so that the liquid crystal panel (AA) is driven based on the external vertical synchronizing signal (Vs), after repeatedly performing the second process with respect to a plurality of the internal vertical synchronizing signals (Vs), when a display control signal which instructs displaying of an image on the liquid crystal panel (AA) is supplied.

Driving control device of electro-optical panel, electro-optical device, imaging apparatus, and driving control method of electro-optical panel

A projector includes a lamp that emits projection light to project 3D picture, in which a right eye image and a left eye image are represented in a time division manner, to an object, a synchronization signal transmission section which transmits shutter synchronization signal to glasses having a right eye shutter and a left eye shutter to control the opened state or the closed state of the right eye shutter and the left eye shutter, based on the signal indicating a displaying period of the right eye image and the left eye image of 3D picture, and a lamp drive section that supplies AC current having peak overlapping with a period when the right eye shutter of the glasses is in the opened state and peak overlapping with a period when the left eye shutter of the glasses is in the opened state to the lamp, based on the signal.

Method for controlling a tree-dimensional projector

Projector for displaying a 3-dimensional stereoscopic image

Projector for displaying a three-dimensional picture

A projector which includes a light source, liquid crystal light valves, a dimming mechanism, an illumination optical system, a control circuit which determines an input light amount which is caused to be input to the liquid crystal light valve on the basis of an input image signal, outputs an output image signal which is decompressed according to the input light amount, and generates a first control signal which designates a first dimming rate of a high pressure mercury lamp and a second control signal which designates a second dimming rate of the dimming mechanism based on the input light amount, an illumination driving circuit which drives the light source on the basis of the first control signal, and a douser driving circuit which drives the douser on the basis of the second control signal.

Projection type display device and control method thereof

Projector having a lamp that emits projection light to project a 3D picture

Provided is an electro-optical device including a first pixel group in which is written into each pixel electrode of the first pixel group via a first wiring in a first path, a second pixel group in which is written into each pixel electrode of the second pixel group via a second wiring in a second path, an common electrode that is common to the first pixel group and the second pixel group, and a compensation unit performing compensation on at least one of a voltage supplied to the first pixel group via the first wiring and a voltage supplied to the second pixel group via the second wiring, in such a manner as to reduce a difference between an optimal voltage of the common electrode with respect to the first pixel group and an optimal voltage of the common electrode with respect to the second pixel group.

Electro-optical device and electronic apparatus having compensation unit for performing voltage compensation

Projector with three-dimensional display

A display control circuit includes: a frame memory; a first correction image data generation unit that generates first correction image data that corrects a response characteristic of an electro-optical element; a second correction image data generation unit that generates second correction image data that corrects the intermixing of a right-eye image and a left-eye image; a selection unit that selects the first correction image data in a first field and the second correction image data in a second and subsequent fields; and a correction unit that generates output image data by correcting the first image data.

Stereoscopic electro-optical device and electronic apparatus with cross-talk correction

A signal processing circuit supplies a gradation signal specifying a gradation to be displayed on pixels comprising; a conversion unit that extracts a extraction signal specifying a gradation to be displayed on a predetermined number of pixels including a certain pixel for each RGBW, from the video signal specifying a gradation to be displayed on a pixel for each RGBW, a storage unit that stores a predetermined number of coefficients for each RGBW, a first selection unit that selects a single color signal specifying a gradation to be displayed on a block with regard to a display color of a certain pixel, from the extraction signal, a second selection unit that acquires a predetermined number of coefficients corresponding to the display color of a certain pixel and a calculation unit that generates a gradation signal based on the outputs from the first selection unit and the second selection unit.

Signal processing circuit, display device and electronic apparatus

When a single pixel is displayed by four color sub-pixels, or R (red), G (green), B (blue), and G, in a Bayer array, this invention sets the scaling rate of a scaling process to 3/2 times when executing the scaling process on image data having three color components, or R, G, and B, and then executes a color conversion process for finding four color components from the three color components; after this, a decimation process for reducing the number of pixels is carried out. Setting the scaling rate of the scaling process to an integer proportion, moir&#xe9;s caused by the scaling process can be made less noticeable. Note that it is desirable for the scaling rate of the scaling process to be close to &#x221a;2 and for the denominator of the integer proportion to be lower.

Image processing apparatus, display apparatus, and image processing method

A control device that controls a video signal to be input to a display device and controls the luminance of a light source that causes light to be incident on the display device includes: a light source luminance control section that controls the luminance of the light source by means of a light source luminance control signal; a storage section that stores relationships between light source luminance control signals and video correction amounts; a video correction signal generating section that generates, on the basis of the video correction amount that is stored in the storage section and corresponds to the generated light source luminance control signal, a video correction signal that is used to correct the video signal; and a video signal correcting section that corrects the video signal by means of the video correction signal.

Control device and electronic device

A liquid-crystal-device control circuit includes pixels corresponding to intersections between scanning lines in rows and data lines in columns, a counter that counts the number of horizontal lines included in a video signal supplied correspondingly to a region broader than pixels corresponding to the scanning lines in the rows, a determination circuit that determines which is greater between the number of horizontal lines counted by the counter and a value stored in a predetermined register, an addition/subtraction circuit that, depending on a result of determination by the determination circuit, adds a predetermined number to or subtracts the predetermined number from the value stored in the register, and a scanning control circuit which stores the value obtained by the addition/subtraction circuit in the register, and which defines start timing of the second field on the basis of the value stored in the register.

Liquid crystal device, control circuit therefor, and electronic apparatus

A driving circuit for an electro-optical device drives an electro-optical device an image display region driven by a scanning line driving circuit that drives a plurality of scanning lines. The image display region is divided into a plurality of partial regions. The scanning line driving circuit supplies scanning signals alternately to the partial regions and sequentially to a plurality of scanning lines in the respective partial regions, and an image signal supply circuit supplies image signals to a plurality of data lines such that each of the plurality of partial regions is subjected to horizontal scanning in a 1/n horizontal scanning period. The scanning line driving circuit supplies the scanning signals such that a scanning line, which is disposed at an edge of one side in the image display region, is the last for each field period.

Growing community of inventors

Suwa, Japan

Hiroshi Yoshimoto