31results about How to "Luminance of image is decreased" patented technology

In a display device including a backlight and a display panel, the area of the backlight is divided into a plurality of unit regions; the display panel includes pixels which are larger in number than the unit regions; a frame rate of image data input to the device is converted to perform display while part of the unit regions in which black is displayed is in a non-light emission state; and the driving frequency of the backlight is converted in accordance with the display.

To provide a hold-type display device without a problem of motion blur and a driving method thereof. The length of a period for displaying a blanking image in one frame period is controlled in accordance with a control parameter showing the degree of motion blur, and the level of a signal supplied to a display element is changed in accordance with the length of the period for displaying the blanking image. Accordingly, the hold-type display device without a problem of motion blur and the driving method thereof can be provided.

In a period Tin, p-th input image data (p is a positive integer) and (p+1)th input image data are input to a liquid crystal display device. In a period T, i-th original image data (i is a positive integer) and (i+1)th original image data are generated based on the input image data. J number of sub-images (J is an integer equal to or more than 3) are generated based on the i-th original image data. In the period T, the J number of sub-images are sequentially displayed. At least one of the i-th original image data and the (i+1)th original image data is in an intermediate state between the p-th input image data and the (p+1)th input image data. Each of the sub-images exhibits one of first brightness and second brightness. At least one sub-image among the J number of sub-images is different from the other sub-images.

A display device includes: an average value calculating section which inputs video signals having linear property and calculates an average value of levels of the video signals in each pixel; an average value memory section which sequentially stores the average values calculated by the average value calculating section; a still image determining section which determines whether a still image is displayed on a present screen based on a difference between the average value stored in the average value memory section and a last average value; a coefficient calculating section which, when the determination is made that a still image is displayed on the present screen as a result of the determination in the still image determining section, calculates coefficients for lowering luminance of an image displayed on the display device; and a coefficient multiplying section which multiplies the video signals by the coefficients calculated by the coefficient calculating section.

To provide a hold-type display device without a problem of motion blur and a driving method thereof. The length of a period for displaying a blanking image in one frame period is controlled in accordance with a control parameter showing the degree of motion blur, and the level of a signal supplied to a display element is changed in accordance with the length of the period for displaying the blanking image. Accordingly, the hold-type display device without a problem of motion blur and the driving method thereof can be provided.

Disclosed is a display device capable of achieving a high definition imaging without depending on micronization of display cells. The display device includes: a display panel in which display cells capable of being independently driven are two-dimensionally arranged; and a drive circuit that decomposes an original image that includes plural pixels into plural sub-sampling images that include the pixels which are respectively intermittent in a row direction and a column direction, and sequentially displays the plural sub-sampling images on the display panel. The drive circuit drives a display cell group including plural display cells that are two-dimensionally arranged to be adjacent to each other, corresponding to the respective pixels. The display cell groups respectively corresponding to two arbitrary sub-sampling images are overlapped and are disposed to be mutually shifted.

A method for operating an electronic device with lower power consumption is provided. The electronic device includes a display device and a touch sensor. In the case where the touch sensor senses no touch, the touch sensor is brought into a resting state or operated so as to perform a sensing operation at a reduced drive frequency. Also in the case where the touch sensor constantly senses touches and an image on the display device is not changed, the touch sensor is brought into the resting state or operated so as to perform the sensing operation at a reduced drive frequency.

A display unit has R, G, and B light-emitting pixels arranged in a predetermined sequence. The R pixels and the B pixels each have a G-light-absorbing filter at the image display side (light output side or external-light incident side) thereof. The G pixels have no filters. The R and B light-emitting pixels each have a composite structure including a reflective layer, an organic EL layer, and a translucent reflective layer. The translucent reflective layer and the reflective layer constitute an optical resonator that causes multiple interference of light. The transmittance of the G-light-absorbing filter is minimized at the G wavelength, at which the sensitivity of the naked eye is high, and maximized at the R and B wavelengths. Furthermore, the external light reflectance of each pixel is minimized at the G wavelength. This display unit significantly suppresses a decrease in contrast caused by external light without a decrease in luminance of an image.

In a projection image displaying device which projects imaging light emitted from a projection lens 2 by being reflected by a projection mirror 3, an air inlet 4d for sucking external air is provided at the position of a sealing mechanism 3a of the projection mirror 3. Air blown off through openings 2a, 2b provided around the projection lens 2 is sucked into a case through this air inlet 4d. When a cooling operation of cooling components within the case is to be performed by sealing the projection mirror 3, a sucking operation through the air inlet 4d is stopped. This prevents dust in the external air from adhering to a reflective surface of the projection mirror regardless of the installation state of the projection image displaying device.

Provided are an apparatus and a method for generating a high quality SDR image without significant reduction in image average luminance by matrix conversion for an HDR image. An image signal processing unit that converts the HDR image into the SDR image converts a pixel value of the HDR image into a pixel value of the SDR image, applying one conversion matrix to low luminance region pixels having luminance that is a prescribed threshold or less among constituent pixels of the HDR image. A high luminance region pixel having higher luminance than the prescribed threshold is set as a highest output pixel of the SDR image after conversion. The conversion matrix to be applied is a matrix having setting in which a change rate of a memory color set in a Macbeth color chart becomes smaller.

An image processing method and a display device thereof are provided. The method is adapted to a display panel with a display area. The image processing method includes the following steps. Whether original images to be displayed on a plurality of sub-areas of the display area are still is analyzed and determined. When the original image in a current sub-area is still, a time length of the original image being still is recorded. The current sub-area is one of the sub-areas. Processing levels corresponding to a plurality of image processing schemes are determined based on the time length. Overall or partial luminance (luma) of the original image in the current sub-area is gradually reduced by the image processing schemes with the determined processing levels, and a corresponding luma-reduced image is displayed on the current sub-area.

An optical system includes: a first panel including a plurality of first electrodes extending in a first direction; a second panel facing the first panel and including a plurality of second electrodes extending in a second direction crossing the first direction; an optical conversion layer between the first panel and the second panel; and a first insulating layer between the first electrodes and the second electrodes, the first insulating layer including an organic material, wherein, in a touch mode, one or more of the first electrodes and one or more of the second electrodes crossing each other form a touch sensing capacitor, and wherein, in a multi-view mode, the first electrodes and the second electrodes apply an electric field to the optical conversion layer, the electric field depending on a voltage difference between the first electrode and the second electrode, to generate different phase differences.

An image display apparatus includes: a light source; a spatial light modulation element modulating light from the light source based on a video signal; light quantity adjustment section adjusting the light quantity of light from the light source based on luminance information in the video signal; image correction section correcting luminance level of the video signal in accordance with light quantity adjustment by the light quantity adjustment section, and supplying a corrected video signal to the spatial light modulation element; and re-adjustment section performing re-adjustment such that a light quantity adjustment target is re-adjusted to a lower value, in a case that a final display luminance level, representing a luminance of the light modulated by the spatial modulation element, is lower than a predetermined first luminance level, where the light quantity adjustment target represents a adjustment target value in the light quantity, employed by the light quantity adjustment section.

In a period Tin, p-th input image data (p is a positive integer) and (p+1)th input image data are input to a liquid crystal display device. In a period T, i-th original image data (i is a positive integer) and (i+1)th original image data are generated based on the input image data. J number of sub-images (J is an integer equal to or more than 3) are generated based on the i-th original image data. In the period T, the J number of sub-images are sequentially displayed. At least one of the i-th original image data and the (i+1)th original image data is in an intermediate state between the p-th input image data and the (p+1)th input image data. Each of the sub-images exhibits one of first brightness and second brightness. At least one sub-image among the J number of sub-images is different from the other sub-images.

An image photographing apparatus and an image photographing method thereof are provided. The image photographing method includes determining an illuminance of a photograph environment during image photographing; and controlling a resolution of a captured image according to the determined illuminance.

An electronic mirror device for displaying an image captured by a camera mounted to a vehicle includes a liquid crystal display having a display surface, a retarder, and a cholesteric liquid crystal layer. The retarder is disposed opposite the display surface of the liquid crystal display, and circularly polarizes a liquid crystal image emitted from the liquid crystal display. The cholesteric liquid crystal layer is disposed on the opposite side of the retarder from the liquid crystal display. The liquid crystal image circularly polarized by the retarder passes through the cholesteric liquid crystal layer.

A display control device includes: an input unit that receives environmental information on a vehicle; and a controller that outputs to an image generator a first control signal for generating a first specific image representing a presentation image to be displayed on a display medium. When decreasing the luminance of the presentation image based on the environmental information, the controller outputs to the image generator a second control signal for generating a second specific image representing the presentation image with a hue changed to decrease a blue component in a display color.

A display apparatus that displays an image implements a correction to reduce a luminance of the image. Next, the display apparatus determines an amount of light of a backlight including a plurality of light sources lighting a screen, based on the reduced luminance of the image. Then, the display apparatus controls the backlight to conform to the amount of light determined based on the reduced luminance. Thus, the amount of light of the backlight is reduced. As a result, the display apparatus can reduce current consumption.

A display control device includes: an input unit that receives environmental information on a vehicle; and a controller that outputs to an image generator a first control signal for generating a first specific image representing a presentation image to be displayed on a display medium. When decreasing the luminance of the presentation image based on the environmental information, the controller outputs to the image generator a second control signal for generating a second specific image representing the presentation image with a hue changed to decrease a blue component in a display color.

An image processing method and a display device thereof are provided. The method is adapted to a display panel with a display area. The image processing method includes the following steps. Whether original images to be displayed on a plurality of sub-areas of the display area are still is analyzed and determined. When the original image in a current sub-area is still, a time length of the original image being still is recorded. The current sub-area is one of the sub-areas. Processing levels corresponding to a plurality of image processing schemes are determined based on the time length. Overall or partial luminance (luma) of the original image in the current sub-area is gradually reduced by the image processing schemes with the determined processing levels, and a corresponding luma-reduced image is displayed on the current sub-area.

A display device includes a display panel including a plurality of pixels, a display panel driver, and a zone compensating circuit which divides the display panel into a plurality of unit blocks, obtains load values of input image data for the unit blocks, and generates corrected image data by correcting the input image data based on the load values. Each of the load values corresponds to one of the unit blocks. The display panel driver generates a data signal for displaying an image on the display panel based on the corrected image data. When grayscale values included in the input image data are the same, a luminance of the image displayed on the display panel is decreased moving away from a center of a reference block having a largest load value among the unit blocks based on the corrected image data.

In a projection image displaying device which projects imaging light emitted from a projection lens by being reflected by a projection mirror, an air inlet for sucking external air is provided at the position of a sealing mechanism of the projection mirror. Air blown off through openings provided around the projection lens is sucked into a case through this air inlet. When a cooling operation of cooling components within the case is to be performed by sealing the projection mirror, a sucking operation through the air inlet is stopped. This prevents dust in the external air from adhering to a reflective surface of the projection mirror regardless of the installation state of the projection image displaying device.

A method for operating an electronic device with lower power consumption is provided. The electronic device includes a display device and a touch sensor. In the case where the touch sensor senses no touch, the touch sensor is brought into a resting state or operated so as to perform a sensing operation at a reduced drive frequency. Also in the case where the touch sensor constantly senses touches and an image on the display device is not changed, the touch sensor is brought into the resting state or operated so as to perform the sensing operation at a reduced drive frequency.

Disclosed is a display device capable of achieving a high definition imaging without depending on micronization of display cells. The display device includes: a display panel in which display cells capable of being independently driven are two-dimensionally arranged; and a drive circuit that decomposes an original image that includes plural pixels into plural sub-sampling images that include the pixels which are respectively intermittent in a row direction and a column direction, and sequentially displays the plural sub-sampling images on the display panel. The drive circuit drives a display cell group including plural display cells that are two-dimensionally arranged to be adjacent to each other, corresponding to the respective pixels. The display cell groups respectively corresponding to two arbitrary sub-sampling images are overlapped and are disposed to be mutually shifted.

The present disclosure relates to an image processing apparatus, an image processing method, and a program which can suppress degradation of image quality when power consumption of a display unit is reduced by reducing luminance of an image. A determining unit determines a reduction amount of luminance of a pixel based on characteristics of each pixel of an input image. A reducing unit reduces the luminance of the pixel of the input image by the reduction amount determined by the determining unit. The present disclosure can be applied to, for example, an image processing apparatus, or the like, which reduces luminance of a pixel based on characteristics of each pixel of an input image and displays the input image whose luminance is reduced.

An image display apparatus may include a light source, a spatial light modulation element, light quantity adjustment section, image correction section and re-adjustment section. The re-adjustment section may perform re-adjustment such that, of a light quantity adjustment target and a luminance level correction target, at least the luminance level correction target is re-adjusted to a value in an opposite direction from a correction direction by the image correction section, in a case that a final display luminance level, representing a luminance of the light modulated by the spatial modulation element, is higher than a predetermined luminance level, where the luminance level correction target represents a correction target value in the luminance level of the video signal, employed by the image correction section, and the light quantity adjustment target represents a adjustment target value in the light quantity, employed by the light quantity adjustment section.

Provided are an apparatus and a method for generating a high quality SDR image without significant reduction in image average luminance by matrix conversion for an HDR image. An image signal processing unit that converts the HDR image into the SDR image converts a pixel value of the HDR image into a pixel value of the SDR image, applying one conversion matrix to low luminance region pixels having luminance that is a prescribed threshold or less among constituent pixels of the HDR image. A high luminance region pixel having higher luminance than the prescribed threshold is set as a highest output pixel of the SDR image after conversion. The conversion matrix to be applied is a matrix having setting in which a change rate of a memory color set in a Macbeth color chart becomes smaller.

An image processing method and a display device thereof are provided. The method is adapted to a display panel with a display area. The image processing method includes the following steps. Whether original images to be displayed on a plurality of sub-areas of the display area are still is analyzed and determined. When the original image in a current sub-area is still, a time length of the original image being still is recorded. The current sub-area is one of the sub-areas. Processing levels corresponding to a plurality of image processing schemes are determined based on the time length. Overall or partial luminance (luma) of the original image in the current sub-area is gradually reduced by the image processing schemes with the determined processing levels, and a corresponding luma-reduced image is displayed on the current sub-area.