Sanyo Electric Co., Ltd.

Sanyo Telecommunications Co., Ltd.

Susumu Tanase

Masutaka Inoue

Yukio Mori

Haruhiko Murata

Atsuhiro Yamashita

Shigeo Kinoshita

Takaaki Abe

Akihiro Maenaka

Toshiya Iinuma

Masahiro Haraguchi

Yoshinao Hiranuma

Toshiyuki Okino

Seiji Tsuchiya

Takashi Yabukawa

Hiroyuki Goya

Hidekazu Uchida

Seiji Okada

Yuichi Taneya

Syugo Yamashita

Shugo Yamashita

Kazuo Nakamoto

Masae Ichino

Takashi Ikeda

Ken Mashitani

Goro Hamagishi

Atsushi Kinoshita

Minoru Takahashi

Kazunobu Mameno

Eiji Nakayama

Tomoya Terauchi

Koji Marumo

Masahiko Yoshiyama

Kanzi Ihara

A projection display apparatus includes an imager that modulates light emitted from a light source and a projection unit that projects light emitted from the imager on a projection surface. The projection display apparatus includes: an imager controller that controls the imager to display a test pattern image in which a characteristic point is defined by at least three adjacent regions; an acquisition unit that acquires a captured image of the test pattern image from an imaging element configured to capture the test pattern image projected on the projection surface; and an adjustment unit that identifies the characteristic point included in the captured image on the basis of the captured image acquired by the acquisition unit and adjusts an image to be projected on the projection surface on the basis of the identified characteristic point. The at least three adjacent regions surround the characteristic point and are adjacent to the characteristic point.

Projection display apparatus

A projection display apparatus includes: a light amount sensor which detects an amount of light emitted from an array light source; a deterioration rate calculator which acquires an amount of light of a measurement target light source from the amount of light detected by the light amount sensor; a reference light amount storage which stores a reference amount of light of an amount of light emitted from plurality of solid state light sources, for each of the solid state light sources; and a light source controller which controls the amount of light emitted from the plurality of solid state light sources for each of the solid state light sources, and the deterioration rate calculator determines whether the measurement target light source has deteriorated, in accordance with a result of a comparison between the amount of light detected by the light amount sensor, and the reference amount of light.

Projection display apparatus with a device to measure deterioration in an array light source

The image signal converting apparatus is used in a lighting unit. The lighting unit includes a liquid crystal panel modulating a red component light according to a red image signal, a liquid crystal panel modulating a green component light according to a green image signal, and a liquid crystal panel modulating a blue component light according to a blue image signal. Yellow component light is superimposed on any of the red component light, the green component light and the blue component light. The image signal converting apparatus includes a controlling unit which controls a superimposition amount of yellow component light based on a specific image signal among a red image signal, a green image signal, and a blue image signal. A color corresponding to the specific image signal has a hue adjacent to a hue corresponding to the yellow component light. The controlling unit controls a reduction amount of the specific image signal based on the superimposition amount.

Image signal converting apparatus and image display apparatus

An image signal processor includes a controller configured to generate a red output signal, a green output signal, a blue output signal and a fourth color output signal in accordance with image input signals. A fourth color light component enables to reproduce a color outside the range of a color reproducible by the red light component, the green light component and the blue light component. The controller generates the fourth color output signal on the basis of a reference signal corresponding to a color different from a complementary color of a color reproduced by the fourth color light component.

Image signal processor and image display device

A technology for reducing the so-called 'phosphor burn-in' phenomenon where the variation of luminance arises by reducing display luminance of a certain pixel caused by deterioration in a display apparatus constituted by an organic electro luminescence element is provided. In the display apparatus, when displaying an image acquired by an image acquiring unit, luminance substantially same as average luminance of the acquired image is set to a non-display area where the image is not displayed.

Organic electro luminescense display apparatus and application thereof

An illumination apparatus includes: a solid-state light source; a Peltier element configured to cool the solid-state light source; a light amount sensor configured to detect an amount of a light emitted from the solid-state light source; a power consumption monitor configured to monitor power consumptions of the solid-state light source and the Peltier element; and a power controller configured to control powers supplied to the solid-state light source and the Peltier element. The power controller controls the powers supplied to the solid-state light source and the Peltier element, on the basis of the light amount detected by the light amount sensor and a sum of the power consumptions of the solid-state light source and the Peltier element.

Illumination apparatus, display apparatus and projection display apparatus

A projection-type image display device has a solid light source and a light valve, and causes light emitted from the solid light source to perform scanning on the light valve along a predetermined scanning line. The projection-type image display device is provided with a modulation amount controller configured to control a modulation amount of the light valve according to an input video signal which is a video signal inputted to the projection-type image display device, and an output controller configured to determine a reference output according to the input video signal. The output controller controls an output of the solid light source according to the reference output.

Projection-type image display device having illuminance improving coefficient calculator

A display apparatus includes an RGB-RGBX signal converter having a variable RGB-RGBX conversion ratio and configured to convert an RGB signal into an RGBX signal. An RGBX type self light-emitting display is configured to display video, based on the RGBX signal obtained by the RGB-RGBX signal converter. A controller is configured to control the RGB-RGBX conversion ratio utilized for converting the RGB signal into the RGBX signal, in accordance with a display position of the RGB signal.

Display apparatus

A display device has: an RGB-RGBW conversion circuit that converts RGB signals fed thereto into RGBW signals; a display panel that has a plurality of dots each composed of four, namely R, G, B, and W, unit pixels and that displays an image based on the RGBW signals; a defect position specifier that specifies, if a unit pixel is found defective, a position of the defective pixel on the display panel; and a conversion rate controller that controls the rate at which, when the RGB signals are converted into the RGBW signals, the RGB signals are converted into a W signal according to the position of the defective pixel. If the defective pixel is a W pixel, the conversion rate for pixels adjacent thereto is made lower than the standard conversion rate set for the entire display panel.

Display device

An uneven display correction method including a first step of dividing a display area of a display panel into a plurality of unit areas, the first step setting one arbitrary unit area among the unit areas at a reference area, the first step previously determining a value as a correction parameter in each unit area, the value corresponding to a difference between a light-emission start gradation level of the unit area and the light-emission start gradation level of the reference area; and a second step of correcting an input video signal based on the correction parameter determined in each unit area.

Method of correcting uneven display

When an input detection unit has detected that no user operation has been performed to an organic EL display apparatus for a predetermined period of time or when a processing detection unit has detected that a predetermined processing is being performed, the input detection unit or the processing detection unit outputs an instruction to a reference voltage adjusting unit to modify a reference voltage referenced by a DAC unit upon conversion to an analog output signal.

Display apparatus, mobile terminal and luminance control method in the mobile terminal

The invention provides an organic LED display device of the digital drive type which has a display panel comprising a plurality of pixels. Each of the pixelscomprises an organic EL element, a drive transistor TRfor effecting or interrupting the passage of current through the EL elementin response to the input of an on/off control signal, a write transistor TRto be brought into conduction upon receiving scanning voltage applied thereto from a scanning driver, a capacitance element C to be supplied with data voltage from a data driver by the write transistor TRconducting, and a comparatorfor comparing a predetermined ramp voltage with the output voltage of the capacitance element C and supplying the result of comparison to the drive transistor TRas the on/off control signal.

Display device of digital drive type

A luminance control method for an organic EL display comprises a first step of calculating a luminance accumulation value for each screen on the basis of a video input signal, and a second step of controlling the amplitude of the video input signal on the basis of the luminance accumulation value calculated in the first step and feeding to the organic EL display the video signal whose amplitude has been controlled.

Organic EL display luminance control method and luminance control circuit

In a motion detecting device, with respect to a target pixel for which detection of motion is going to be performed, the threshold value to be used by comparator circuitsandis varied based on the difference of image data between two pixels vertically adjacent to the target pixel. The comparator circuitcompares the difference, between two fields, of the image data of the target pixel with the threshold value, and the comparator circuitcompares the differences, between two fields, of the image data of the two pixels vertically adjacent to the target pixel with the threshold value. An adder circuitadds together the comparison results with weights assigned thereto, and the detection of motion is performed based on the resulting sum.

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Kadoma, Japan

Susumu Tanase