Canon Kabushiki Kaisha

Masahiro Funada

Yoichi Takaragi

Eiji Ohta

Ken-ichi Ohta

Michio Kawase

Yoshiyuki Suzuki

Toshiyuki Kitamura

Yutaka Udagawa

Shinobu Arimoto

Mitsuru Kurita

Koichi Ishimoto

Kenichi Outa

Yukari Toda

Yasumichi Suzuki

Katsuyoshi Maeshima

Mitsuhiro Yamamoto

Ken-ich Ohta

Shokyo Koh

Toshiaki Yagasaki

Junichi Yamakawa

Akiko Kanno

Yushi Matsukubo

Takashi Suzuki

Yukio Sato

Takeshi Aoyagi

Mamoru Sato

Shigeo Fukuoka

Hiroyuki Takahashi

Tadashi Takahashi

Masanori Yamada

Masanori Sakai

Hiroyuki Yaguchi

Hiroyuki Ichikawa

Makoto Takaoka

Tomotoshi Kanatsu

Ryosuke Miyamoto

Akihiro Usami

Kiyohisa Sugishima

Hideaki Shimizu

Koji Kajita

Tatsuhito Kataoka

Kenichi Ohta

Yasuhiro Takiyama

Rieko Akiba

Ken-Ichi Ohta

An image display apparatus includes a display, an input unit configured to receive input data including an input image in which a first dynamic range is defined and including information relating to luminance of the input image, and at least one processor or circuit for executing tasks of converting the first dynamic range into a second dynamic range having a maximum luminance lower than that of the first dynamic range, acquiring a user set maximum luminance of the second dynamic range, acquiring a maximum display luminance when the display unit displays the maximum luminance of the second dynamic range under a display condition set for the display unit, and generating a setting screen for a user setting. The setting screen displays information indicating a relative relation among the information relating to luminance acquired from the data, the user set maximum luminance and the maximum display luminance.

Image display apparatus

To facilitate selection of a display manner in a display device capable of displaying an image(s) based on a plurality of image signals, the display device according to the present invention includes: a video inputter including a plurality of input terminals configured to acquire a plurality of image signals including image data to be displayed by a display unit; a detector configured to detect characteristics of the image signals; a group determinator configured to classify the image signals into at least one group based on the characteristics detected by the detector; and an output control unit configured to output information indicating a display mode of the display unit associated with at least one group.

Electronic device that classifies image signals, display device, and display control method

A display apparatus includes an image input unit capable of inputting an image in a first format in which a first resolution in a first direction is higher than a second resolution in a second direction and an image in a second format in which the second resolution is higher than the first resolution, a determination unit configured to determine whether a format of the image input via the image input unit is the first format or the second format, a rotation unit configured to rotate the image such that the first and second directions are replaced with each other, a rotation controller configured to control the rotation unit depending on the format of the image, and a display unit configured to display an output image from the rotation unit.

Display apparatus and method of controlling the same

A projection-type display apparatus includes a setting unit configured to set a vertical keystone correction value used to correct a vertical distortion of a projection image and a horizontal keystone correction value used to correct a horizontal distortion of the projection image, and an image generator configured to generate an image representing a current vertical keystone correction value and a current horizontal keystone correction value that are set by the setting unit, and a settable range of each of the vertical keystone correction value and the horizontal keystone correction value from the current vertical keystone correction value and the current horizontal keystone correction value.

Projection-type display apparatus with a keystone correction feature for correcting keystone distortion in a projection image

When an image signal suitable for performing automatic adjustment of an effective image area and a dot clock is not output, the adjustment may be unsuccessfully performed. An effective image area detector detects an effective image area and determines whether an image in the effective image area is a blank image. If a synchronization signal detector determines that there exists a synchronization signal and if the effective image area detector determines that the image is not a blank image, a controller adjusts an area captured as image data by an input signal processor.

Display apparatus, method and computer readable medium that avoids failure in an automatic adjustment of an effective image area and dot clock

A display apparatus, equipped with a common input terminal inputting different video signals, can discriminate the type of an input video signal entered from the common input terminal. The display apparatus includes the common input terminal inputting different video signals. A synchronizing signal separation unit separates a synchronizing signal from a video signal entered from the common input terminal. A frequency measurement unit measures a frequency of the synchronizing signal. An input signal discrimination unit discriminates the video signal entered from the common input terminal based on a type of the synchronizing signal separated by the synchronizing signal separation unit and a measurement result obtained by the frequency measurement unit.

Display apparatus capable of discriminating the type of video signal input from a common terminal

A display apparatus includes a first determiner configured to determine a terminal into which a video signal inputs and to determine a terminal into which a synchronizing signal type inputs, a frequency measuring unit, a switch configured to connect one of first and second input terminals to the frequency measuring unit, and a second determiner configured to determine a video signal type input into the input terminal which is connected by the switch to the frequency measuring unit on the basis of a determination result of the synchronizing signal type in the first determiner and a measurement result of the frequency in the frequency measuring unit and to determine a video signal type input into the input terminal which is not connected by the switch to the frequency measuring unit on the basis of the determination result of the synchronizing signal type in the first determiner.

Display apparatus

A display apparatus includes an image processor commonly provided to a plurality of channels, and configured to provide processing to an image signal of a selected channel selected by a channel switch in accordance with a parameter, a parameter acquirer commonly provided to the plurality of channels, and configured to obtain the parameter in accordance with a format of the image signal of the selected channel, a memory controller configured to hold the parameter for a first channel in a memory while a detector detects the image signal in the first channel even after the channel switch switches from the first channel to a second channel, and to delete the parameter when the detector detects no image signal in the first channel, and an image processing controller configured to set the parameter to the image processor without acquiring a new parameter from the parameter acquirer.

A display apparatus is configured to control a clock generator so that a phase of a clock can maximize an integrated evaluation value that is an integrated value of a differential absolute value between adjacent pixels in an image display unit over one frame of a plurality of digital video signals corresponding to a plurality of clocks having different phases generated by the clock generator when a value made by dividing a maximum value of the integrated evaluation value by a minimum value of the integrated evaluation value is larger than a threshold, and to control the clock generator so that the phase of the clock can correspond to an intermediate position in a phase range in which the position becomes constant relative to the phase of the clock when the value made by dividing the maximum value by the minimum value is equal to or smaller than the threshold.

Display apparatus and display method

The display apparatus includes an image display element being driven based on a digital video signal, a quantizing part converting an input analog image signal into the digital video signal based on a quantization phase and a quantization frequency, and a converting part converting an input value into an output value, the input value being a difference value of signal values of pixels adjacent to each other in the digital video signal. The apparatus includes an accumulating part accumulating the output values from the converting part that converts the difference values obtained over entire pixels in one frame of the digital video signal to produce an accumulation evaluation value, and a controller adjusting the quantization phase in the quantizing part such that the accumulation evaluation value becomes maximum. The output values a(m) for the input values k1, k2 and k3 satisfy conditions of a(k1+1)&#x2212;a(k1)&#x3c;a(k2+1)&#x2212;a(k2), a(k2+1)&#x2212;a(k2)=a(k3+1)&#x2212;a(k3) and k1&#x3c;m&#x2266;k2&#x3c;k3&#x3c;m.

The display apparatus includes an AD converter converting an analog video signal into a digital video signal, a phase adjuster and a horizontal start position detector. The detector detects a horizontal start position where an output value of the AD converter becomes a minimum value that exceeds a threshold level in a video horizontal direction. The phase adjuster acquires a start position change phase where the horizontal start position is changed. The phase adjuster calculates a first phase period where the analog video signal starts its transition from a first level to a second (higher) level and then ends the transition. The phase adjuster sets a phase not included in the first phase period as an adjusted phase of the quantization clock.

Display apparatus for automatically adjusting quantization clock phase according to different threshold values in a display apparatus

Display method and apparatus for discriminating between an RGB and a component video input signal

The method adjusts the phase of a quantization clock signal for a video signal automatically based on a received analogue video signal. The method includes a step of determining a horizontal start position and a horizontal end position of a pixel-level transition within the analogue video signal, a step of determining a stable-period start position and a stable-period end position at each transition by sequentially changing an adjustable phase of the quantization clock signal, a step of calculating an appropriate phase of the quantization clock signal based on the determined timings of the beginning and end of the stable periods within the analogue signal, and a step of setting the phase of the quantization clock signal to the calculated appropriate phase.

Automatic quantization clock phase adjustable display apparatus

An image display apparatus includes a memoryhaving a first mode and a second mode in which image data are sequentially written and read per frame and per sub-frame area respectively, a compressorcapable of switching a compression output state and an uncompressed output state in which a compression image data and an uncompressed image data are outputted respectively, and a decompressorcapable of switching a decompression output state and a non-decompression output state. A controllerswitches the compressor from the uncompressed output state to the compression output state during a first input vertical blanking period, switches the decompressor from the non-decompression output state to the decompression output state during a first output vertical blanking period immediately after the first input vertical blanking period, and switches the memory from the second mode to the first mode during a first output vertical blanking period.

Image display apparatus and control method thereof

Growing community of inventors

Yokohama, Japan

Masahiro Funada