375results about How to "Reduce brightness difference" patented technology

The present invention provides a liquid crystal display device which can reduce the difference in brightness between an image obtained from a reflection region and an image obtained from a transmission region. The liquid crystal display device includes a pixel electrode and a counter electrode in each pixel region on a liquid-crystal-side surface of one substrate out of respective substrates which are arranged to face each other with liquid crystal therebetween. The pixel region includes a transmission region and a reflection region. A gap between the pixel electrode and the counter electrode in the reflection region is set larger than the gap between the pixel electrode and the counter electrode in the transmission region.

The invention discloses a display panel, a display method thereof and a display device. During display, sub-pixels in a second display area are controlled to perform display according to brightness higher than brightness corresponding to initial grayscale values corresponding to the sub-pixels, which is equivalent to a condition that the brightness of the second display area is appropriately improved, and therefore, brightness difference between a first display area and the second display area is decreased; alternatively, the brightness of sub-pixels in the preset ranges of the first display area which are adjacent to the second display area is decreased, which is equivalent to a condition that the brightness of sub-pixels in the first display area which are adjacent to the boundaries of the second display area is decreased, and therefore, brightness difference between the first display area and the second display area at the boundaries can be decreased; and alternatively, the increaseof the brightness of the second display area and the decrease of the brightness of the sub-pixels in the first display area which are adjacent to the boundaries of the second display are combined, sothat brightness difference between the first display area and the second display area at the boundaries can be decreased.

A control section divides a single frame so that a ratio of a period corresponding to a latter sub-frame and a period corresponding to a former sub-frame ranges from 1:3 to 1:7. A divisional point of the frame is a point which allows each of the latter sub-frame and the former sub-frame to minimize a difference between an actual brightness and an expected brightness. The frame may thus be divided at the point where the difference is largest in the normal hold display, so that it is possible to minimize the difference at this point. On this account, it is possible to reduce the difference in a single frame substantially by half as compared with an arrangement for carrying out the normal hold display, and thereby suppress the excess brightness caused by the difference.

Disclosed is a backlight assembly and an LCD apparatus having uniform brightness and low power consumption. The backlight assembly has a plurality of lamps for providing light to the LCD panel. Each of the plurality of lamps has two or more sub-lamps connected to each other in series. The backlight assembly has a brightness control unit disposed between the sub-lamps to reduce a brightness difference.

In a method for driving a liquid crystal display apparatus in which in each field, scan lines are successively scanned in order to display an image, the scanning sequence or the polarity of a signal voltage is reversed between a first field and a second field. A liquid crystal display apparatus driven by the method is also disclosed. It is possible to provide a high contrast, high brightness liquid crystal display apparatus which is not affected by electrical asymmetry.

An electronic endoscope system, which is adapted to observe a fluorescence image of autofluorescence emitted from a body cavity wall irradiated with excitation light as well as a normal image of the body cavity wall illuminated with white light on a display device, includes a brightness control system configured to adjust brightness of at least one of the normal image and the fluorescence image to reduce brightness difference between the normal image and the fluorescence image to be displayed.

The invention discloses an image synthetizing method and an image processing device. The brightness of the image to be synthesized is unified before the image synthesis, so that the synthesized image has the advantages of small brightness difference and natural picture effect as compared with the image obtained by using the traditional synthesis modes in the prior art.

In a method for driving a liquid crystal display apparatus in which in each field, scan lines are successively scanned in order to display an image, the scanning sequence or the polarity of a signal voltage is reversed between a first field and a second field. A liquid crystal display apparatus driven by the method is also disclosed. It is possible to provide a high contrast, high brightness liquid crystal display apparatus which is not affected by electrical asymmetry.

The invention relates to a method for improving the partitioned halation of an LED (Light Emitting Diode) backlight source and a control device thereof; the method comprises the following steps: carrying out partitioned statistics according to RGB (Red, Green and Blue) image data, and extracting the calculated value of the partitioned backlight brightness; carrying out neighborhood smooth processing on the calculated value of each partitioned backlight to generate the output value of the backlight brightness; and transmitting the output value of the backlight brightness to a backlight drive module, and driving the LED to be lightened. The device comprises a partitioned backlight value extracting module, a backlight value processing module and a backlight source driving module which are in communication connection in sequence so as to realize the method. In the invention, overlarge brightness difference between adjacent backlight zones is prevented through the smoothing processing on the backlight partition so that the brightness transition of the backlight zone is gentler; therefore, the partitioned halation problem of an LED backlight liquid crystal television can be effectively improved. Simultaneously, the scheme has less influence on the decreasing of brightness without influencing the display effect.

The embodiment of the invention provides a crosstalk compensation method of a display panel and a display device of the crosstalk compensation method. The crosstalk compensation method includes the following steps that firstly, a gray scale compensation range is set, wherein the gray scale compensation range includes gray scales ranging between the lowest gray scale and the highest gray scale; secondly, a lookup table is established to record a plurality of compensation values which correspond to the gray scales in the gray scale compensation range respectively; thirdly, whether the gray scale of first-color sub-pixels on the display panel is within the gray scale compensation range or not is judged, if yes, a corresponding compensation value is selected from the lookup table to adjust the initial gray scale of second-color sub-pixels to a corrected gray scale, and otherwise the initial gray scale of the second-color sub-pixels is maintained, wherein the first-color sub-pixels are adjacent to the second-color sub-pixels.

A tiled display panel and a tiled display device are disclosed. The tiled display panel includes: at least first and second adjacent display areas; a splice area disposed between the first and second adjacent display areas; a first optical element and a second optical element respectively disposed on the first and second display areas and located on two sides of the splice area; and a reflective element disposed on the splice area. Each of the first optical element and the second optical element is configured to direct at least a portion of light emitted from its respective display area to the reflective element, such that the at least a portion of light is reflected by the reflective element and then emitted out from the splice area.

The invention provides a pixel circuit, a display panel and a display device and belongs to the technical field of display. The pixel circuit comprises an adjustment sub-circuit and a drive sub-circuit. The adjustment sub-circuit is connected with a target power end and a drive power end of the drive sub-circuit. The adjustment sub-circuit is used for providing a second drive voltage for the drivepower end of the drive sub-circuit according to a first drive voltage provided by the target power end. The drive sub-circuit is also connected with a data signal end and a light emitting element. The drive sub-circuit is used for outputting a drive current to the light emitting element under the drive of a data voltage provided by the data signal end and the second drive voltage. According to the pixel circuit provided by the invention, light emitting brightness of each pixel in a first display area can be improved, brightness difference between the first display area and a second display area is reduced, and brightness uniformity of the display panel is improved.

An LCD module includes an LCD panel, and a polarizing plate formed on each of the upper and lower surfaces of the LCD panel. The polarizing plate includes a polarizer and a polyester film formed on at least one surface of the polarizer. The polyester film has a difference between the index of refraction in the x-axis direction and the index of refraction in the z-axis direction (nx−nz) of about 0.1 to about 0.18, where nx and nz are the indices of refraction in the x-axis and z-axis directions, respectively, at a wavelength of 550 nm. The LCD module has a CR 45° and a CR 135° of about 1.0% or greater.

Embodiments of the present invention provide an organic light emitting display device including: a plurality of light emitting elements on a first substrate, each of the plurality of light emitting elements including a first electrode and an organic light emitting layer, and a second electrode on the plurality of light emitting elements; a second substrate facing the first substrate with the plurality of light emitting elements therebetween; spacers on the second substrate corresponding to portions of the second electrode, the portions located on spaces between the plurality of light emitting elements; and an auxiliary electrode on the spacers and contacting the second electrode.

A method and apparatus for driving a liquid crystal panel in a line-inversion system is disclosed. In the method, at least one pixel block each of which includes at least two data lines within the liquid crystal panel is set. The adjacent pixels in a gate line direction within the pixel block respond to data signals having the same polarity. The pixels within the other pixel areas except for the pixel block respond to data signals having a polarity contrary to the adjacent pixels at the left and right sides thereof. Accordingly, a current amount charged in the adjacent pixels having a large brightness difference is supplied always equally, so that the brightness difference between the adjacent pixels can be reduced to eliminate a noise pattern in the vertical direction.

A display apparatus includes a plurality of pixels, each of the pixels including a high pixel and a low pixel, a first data driver disposed on a first side of the display panel and applying first data voltages to the high pixels through first data lines, a second data driver disposed on a second side opposite the first side of the display panel and applying second data voltages to the low pixels through second data lines, and a first gate driver formed on a third side of the display panel between the first side and the second side, and sequentially applying gate signals to the plurality of pixels connected to gate lines. The first data voltages are sequentially supplied to the high pixels from the first side of the display panel and the second data voltages are sequentially supplied to the low pixels from the second side of the display.

A liquid crystal display device is disclosed which includes first, second and third data lines arranged in one direction, a data driver for alternately supplying a data signal of a first polarity and a data signal of a second polarity to each of the first, second and third data lines during an interval of two horizontal periods, first and second gate lines arranged to cross the first to third data lines, a gate driver for sequentially driving the first and second gate lines, and first red, first green, first blue, second red, second green and second blue pixels located between the first gate line and the second gate line and arranged in order along the first and second gate lines. The first red pixel cell is connected to one side of the first data line and the second gate line. The first green pixel cell is connected to the other side of the first data line and the first gate line. The first blue pixel cell is connected to one side of the second data line and the first gate line. The second red pixel cell is connected to the other side of the second data line and the second gate line. The second green pixel cell is connected to one side of the third data line and the first gate line. The second blue pixel cell is connected to the other side of the third data line and the second gate line.

The illumination device includes a light source unit having a plurality of LEDs arranged in a linear shape, a light-emergent face extending to one side from the vicinity of an area straightly under the light source unit, and a first reflective body extending to the same side to which the light-emergent face extends from the vicinity of an area straightly over the light source unit, wherein the first reflection body has a first reflection face configured to get close to the light-emergent face as the first reflective body extends from the vicinity of an area straightly over the light source unit, and the light source unit is provided such that an optical axis of the LED is inclined to the first reflective face side with respect to a direction parallel to the light-emergent face.

The invention discloses an array substrate and relates to the technical field of displaying. The array substrate comprises a substrate, grid lines, data lines and pixel units, wherein the grid lines and the data lines are formed on the substrate; each pixel unit is driven by the same grid line and the same data line, and comprises a thin film transistor structure and at least two display regions; and the thin film transistor structure drives pixel electrodes in the at least two display regions simultaneously to enable voltages applied to the pixel electrodes in the at least two display regions to be different. The invention further discloses a display device comprising the array substrate. In the array substrate, each pixel unit is divided into at least two independent display regions and different voltages are applied to the pixel electrodes in the at least two regions, so that liquid crystal molecules in each pixel unit have at least two deflection angles, the luminance difference of a liquid crystal display is reduced and the color difference is further reduced.

The invention provides a display panel and a display device. The display panel comprises a first display area and a second display area, wherein the first display area comprises display units distributed in arrays; each display unit comprises a first pixel unit and a light transmitting unit; the second display area comprises second pixel units distributed in arrays; the light emitting area of eachfirst pixel unit is larger than that of each second pixel unit. Overall luminance of the first display area or a transparent display area is improved by increasing an effective light emitting area ofthe first display area, so that luminance difference between the transparent area and the normal display area is reduced.

A control section divides a single frame so that a ratio of a period corresponding to a latter sub-frame and a period corresponding to a former sub-frame ranges from 1:3 to 1:7. A divisional point of the frame is a point which allows each of the latter sub-frame and the former sub-frame to minimize a difference between an actual brightness and an expected brightness. The frame may thus be divided at the point where the difference is largest in the normal hold display, so that it is possible to minimize the difference at this point. On this account, it is possible to reduce the difference in a single frame substantially by half as compared with an arrangement for carrying out the normal hold display, and thereby suppress the excess brightness caused by the difference.

An image-correction-amount detecting device includes an image signal generation unit, a luminance detecting unit, and a correction value calculation unit. The image signal generation unit generates and supplies image signals having inverted polarities to a display section in which pixels are formed so as to correspond to intersections of a plurality of scanning lines and a plurality of source lines which are arranged in a matrix and which performs pixel display by allowing an image signal supplied to a source line to be applied to a pixel electrode of each pixel via switching elements, the image signal being supplied to the source line by turning on a switching element disposed in the pixel with the scanning signal supplied to the scanning line. The luminance detecting unit detects the luminance of each pixel position of an image displayed by the display section. While changing the reference voltage which is set in the display section, the correction value calculation unit calculates the difference of the luminance between a positive polarity image signal and a negative polarity image signal in each pixel position, calculates the distribution of reference voltages in the display section which applies the minimum luminance difference, and outputs an image correction amount to obtain the optimal reference voltage that matches the effective value of the positive polarity image signal with the effective value of the negative polarity image signal.

A stereoscopic image display device includes a liquid crystal display panel on which frame data is addressed, a frame rate conversion unit that divides 3D input data into left eye image data and right eye image data, and inserts reset frame data including black grayscale data between the left eye image data and the right eye image data, and a luminance difference compensation unit that generates compensation values for compensating a luminance difference depending on positions in a screen of the liquid crystal display panel, wherein a compensation value added to the left eye image data and the right eye image data to be displayed on an upper part of the screen of the liquid crystal display panel is higher than a compensation value added to the left eye image data and the right eye image data to be displayed under the upper part of the screen.

A sequence of image frames are processed to determine if a pair of image frames in the sequence contain a same content, but have different global luminances. If the global luminances are different despite the content being the same, the global luminance of one of the image frames in the pair is adjusted to reduce the difference in the global luminances. The global luminance-adjusted image frames may be provided for further processing operations such as compression and global image stabilization. Reducing the global luminance difference may provide benefits such as improvements to compression and global image stabilization.

A liquid crystal device having a display section provided with a plurality of X electrodes and a plurality of Y electrodes, a master X driver IC and a slave X driver IC for driving the X electrodes, and a Y driver for driving the Y electrodes. The master IC has a display control signal generation section which generates a display control signal based on a signal from an external MPU and an output terminal (or input / output terminal) which outputs the display control signal. Each of the master IC and slave IC has an input terminal for receiving the display control signal from the master IC through an external wiring. This liquid crystal device can eliminate a luminance difference within the display screen driven by the master IC and the slave IC.

A display device can include a display panel comprising a first display area and a second display area that differ in the number of sub-pixels per unit area, a gamma part that generates a first area gamma voltage applied to the first display area and a second area gamma voltage applied to the second display area, and a data driver that generates data voltages by applying the first area gamma voltage to video data displayed in the first display area and applying the second area gamma voltage to video data displayed in the second display area and supplies the data voltages to the sub-pixels in the corresponding areas.

The invention discloses a display device used to improve brightness uniformity of a display product. An embodiment of the invention provides a display device, including a display panel and a backlightarranged on any side of the display panel. The display panel comprises an array substrate, and the array substrate comprises at least a hollow-out portion. The array substrate has a first display region and a second display region. The first display region surrounds the hollow-out portion. Distances between boundary lines of the first display region and the second display region and the edge of the hollow-out portion are smaller than a preset value. An axial lead along the hollow-out portion divides the first display region into a first sub-region and a second sub-region. The first sub-regionis on a far end of the backlight. The second sub-region is on a near end of the backlight. Pixel aperture ratio of the first sub-region is larger than pixel aperture ratio of the second sub-region, and / or, penetration rate of pixels in the first sub-region is larger than penetration rate of pixels in the second sub-region.

In a method of manufacturing a liquid crystal display using a divisional exposure for a substrate, an overlapping area at the boundary between adjacent shots is provided and the shots left and right to the boundary are exposed in a way that the areas of the shots gradually decreases and gradually increases, respectively, to reduce the brightness difference due to stitch errors between the two shots. For example, the number of unit stitch areas assigned to the left gradually decreases and the number of unit stitch areas assigned to the right shot gradually increases as it goes to the right along the transverse direction in the stitch area. A unit stitch includes an area obtained by dividing a pixel into at least two parts.

Disclosed is a backlight assembly and an LCD apparatus having uniform brightness and low power consumption. The backlight assembly has a plurality of lamps for providing light to the LCD panel. Each of the plurality of lamps has two or more sub-lamps connected to each other in series. The backlight assembly has a brightness control unit disposed between the sub-lamps to reduce a brightness difference.