The present application relates to a virtual reality display device and a control method thereof. The method comprises: acquiring time required for three-dimensional scene rendering when three-dimensional scene rendering is performed on a frame of image to be displayed (S11); and selecting a mode of local backlight dimming according to the time required for three-dimensional scene rendering and a predetermined screen refresh rate, wherein the greater the time required for three-dimensional scene rendering, the less the time required for the selected mode of the local backlight dimming (S12).

An adjustment value holding unit holds an adjustment value selected for displaying medical image data on a medical image display device with a predetermined image quality. An image attribute detector detects an attribute of the medical image data. A determiner determines whether or not the adjustment value held in the adjustment value holding unit matches an adjustment value corresponding to the attribute detected by the image attribute detector. A notification unit visually or audibly notifies that the adjustment value held in the adjustment value holding unit does not match the adjustment value suitable for the medical image to be displayed on the medical image display device, when the determiner determines that the adjustment value held in the adjustment value holding unit does not match the adjustment value corresponding to the attribute detected by the image attribute detector.

A display device includes a backlight unit comprising a plurality of blocks so as to be driven for each divided block, each block including a plurality of light source packages, a display panel disposed above the backlight unit, a controller which outputs local dimming data corresponding to a brightness of some blocks among the plurality of blocks, according to an image displayed on the display panel and a backlight unit (BLU) driver which generates additional local dimming data corresponding to a brightness of each of the remaining blocks adjacent to the some blocks, among the plurality of blocks, using the local dimming data, thus the same number of LEDs as the related art is used, but more detailed control is possible so that the display quality is improved.

A method to project content from a moving projector. The method includes analyzing an object to identify a projection surface; determining a first position of a projector relative to the projection surface; modifying a first frame of a content for projection onto the projection surface based on the projection surface and the first position of the projector; projecting the first frame of the content from the projector onto the projection surface; determining a second position of the projector relative to the projection surface; modifying a second frame of the content based on the projection surface and the second position; and projecting the second frame of the content from the projector onto the projection surface.

Described herein are methods and a system to correct environmental light reflecting onto a surface of a display. An image is captured by camera which is processed as an image digital map. Light sources on the image digital map are determined based on correlated camera pixel map and display map. Light sources are on the image digital map are augmented by one or more ambient light sensors (ALS) placed on the periphery of the display. Image correction is performed based on the light sources of the image digital map.

An exercise instruction apparatus for guiding a user to perform a fitness exercise includes a control unit and a display device. The control unit is configured to control a video imagery displayed by the display device. The video imagery shows an instructor image and a user image simultaneously. The instructor image demonstrates movements of the fitness exercise and the user image presented in a mirror image is a real-time image of the user standing in front of the display device. The control unit is configured to adjust at least one image parameters such as brightness, transparency or contrast of at least one of the instructor image and the user image. The image parameter that is adjusted for the instructor image may be a different parameter than the image parameter that is adjusted for the user image. The instructor image may be overlapped on the user image, and the user can adjust the transparency of at least one of the first image and the second image.

It is an object to provide a display device in which a problem of light leakage from a liquid crystal element in black display is reduced or overcome and the contrast is improved. It is another object to provide a pixel circuit having a function to control a lighting state of a backlight based on each pixel. These objects are achieved by turning off a light-emitting element in display of a black gray scale, and by providing a light-emitting element in each pixel and providing, in a pixel circuit, a function to individually control lighting and non-lighting of the light-emitting element depending on a gray scale to perform display. When a backlight is provided in each pixel, a light-emitting element that is a backlight is turned off when a black gray scale is displayed, whereby reduction in contrast due to light leakage from a liquid crystal element can be prevented.

An electronic apparatus includes a memory configured to store first output luminance information corresponding to a first bit image, and second output luminance information corresponding to a second bit image; a display panel; a backlight including a plurality of backlight blocks configured to provide light to the display panel; a driver configured to individually drive each backlight block of the plurality of backlight blocks; and a processor configured to, based on receiving the first bit image, identify brightness information of the first bit image, and based on the brightness information being less than a threshold value, control the driver to drive at least one backlight block, from among the plurality of backlight blocks, based on the second output luminance information, wherein a number of bits of the second bit image is greater than a number of bits of the first bit image.

A display device includes a control circuit. By setting an intermediate point between a start point and an end point of a lighting period as a start point of the lighting cycle, and setting an intermediate point between a start point and an end point of a lighting period of the next lighting period as an end point of the lighting cycle, the control circuit controls a backlight such that an absolute value of a difference value between a first ratio of a sum of a length of a first lighting period in the first lighting cycle and a length of the next second lighting period in the first lighting cycle to a length of the first lighting cycle and the target duty ratio is 0.1 or less.

A light source driving circuit and a method for driving a light source are provided. The light source driving circuit includes a filter. The filter is configured to receive a pixel signal. The filter selects one filter parameter from multiple filter parameters according to a gray level value of the pixel signal. The filter performs a filter operation on the pixel signal according to the selected filter parameter, so as to output a driving signal to drive a light source module. The filter parameters include a first filter parameter, a second filter parameter, and a third filter parameter. The second filter parameter is obtained by performing an interpolation operation on the first filter parameter and the second filter parameter via the filter.