36results about How to "Reduce brightness deviation" patented technology

A driving circuit of a liquid crystal display device and a method for driving the same, which are capable of reducing manufacturing cost of the liquid crystal display device and reducing a luminance deviation so as to improve image quality, are disclosed. The driving circuit of the liquid crystal display device includes an LED backlight which includes a plurality of LED modules arranged in a plurality of division areas and generates light, an internal photosensor which is mounted in any one of the plurality of division areas, for detecting a luminance value, a controller which generates and outputs a plurality of control signals for changing respective luminance values of the plurality of division areas according to the luminance value detected by the internal photosensor, and a plurality of LED drivers which drive the plurality of LED modules according to the plurality of control signals.

Discussed herein are an OLED display device and a method of driving the same. The OLED display device includes according to an embodiment an organic light-emitting diode; a driving transistor involved in driving the organic light-emitting diode and including a bottom gate electrode, an oxide semiconductor layer, a source electrode, a drain electrode and a top gate electrode; a first switching transistor electrically connected to the bottom gate electrode of the driving transistor and involved in transmitting a data voltage to control the driving transistor; a storage capacitor electrically connected to the bottom gate electrode and involved in charging the data voltage; a second switching transistor configured to store a threshold voltage in the storage capacitor; a compensating transistor directly connected to the top gate electrode of the driving transistor to compensate for a deviation in the threshold voltage of the driving transistor; and a compensating capacitor disposed between the source electrode of the driving transistor and a source electrode of the compensating transistor and storing the threshold voltage therein.

A light source module includes a light guide plate having a light incident surface receiving light and a light emitting surface emitting the received light, a board arranged adjacent to the light guide plate and having a light source mounting surface, at least one first light source disposed on the light source mounting surface of the board to provide a first light to the light incident surface of the light guide plate, and at least one second light source disposed on both sides of the light source mounting surface adjacent to the first light source to provide a second light toward the first light source.

The present invention relates to a backlight device and control method thereof, including a case (100); a base substrate (120) installed inside the case (100), and a plurality of LED units (110) modularized and mounted on the base plate (120). In case a part of the plurality of LED units mounted on the base plate is in trouble, a local replacement of an LED unit is possible, so the repair and maintenance are simple and time consuming is short. Further, each of the plurality of modularized LED units is individually controlled in brightness. Therefore, brightness is uniformized among the plurality of LED units to advance the detection precision and the product reliability. In the modularized LED units which can be controlled respectively, the LED units arranged on the substrate fringe have higher brightness, so the brightness deviation is reduced. In addition, the LED units are small in themselves so a plurality of LED units are adjacently arranged to reduce the brightness deviation. Further, a reflecting plate is disposed integrally on the massive substrate of a plurality of LED units of the arranged units, which can simplify the component parts.

A flat panel display, more particularly, a PAM flat panel display featuring low power-consumption is disclosed. The flat panel display includes a current reference generator for generating a data drive current reference for providing a drive current proportional to the size of an input data from outside, and a charge/discharge current reference according to a difference of the data size between the scan lines; and a data driver output for providing directly to the display panel a current corresponding to each of the current references. The flat panel display can be advantageously used in that it reduces the amount or the discharge current that has no effective contribution towards the emission of light by regulating the charge and discharge current of the data drive according to the size of an input data, consequently reducing the total power consumption.

The invention discloses a display panel, a light-emitting control circuit of the display panel, a driving method and a display device, and relates to the technical field of display. The light-emittingcontrol circuit comprises a plurality of light-emitting control circuit sets; and each light-emitting control circuit set comprises at least two light-emitting control sub-circuits. The at least twolight-emitting control circuits can be connected with sub-pixels in the same row, and the colors of the sub-pixels connected with any two light-emitting control sub-circuits are different. In the way,different light-emitting control sub-circuits can be used for providing light-emitting control signals with different duty ratios for the sub-pixels with different colors, and light-emitting durations of light-emitting units in the sub-pixels with the different colors in a display process of a frame of image can be adjusted, so that voltages of data signals output for the sub-pixels with the different colors by a source driving circuit can be adjusted on the premise that the brightness is not changed, the service life of the light-emitting unit with relatively low light-emitting efficiency isprolonged, and the brightness deviation of the light-emitting unit with relatively high light-emitting efficiency, caused by threshold voltage drift is reduced.

The invention discloses a display panel and a display device. The display panel comprises a number of pixel units. Each pixel unit comprises a number of pixel groups. Each pixel group comprises at least one sub-pixel emitting light of one color. At least one side surface of at least one of the pixel groups comprises a solid surface. According to the embodiment of the invention, the pixel unit comprises a number of pixel groups; at least one surface of at least one of the pixel groups comprises a solid surface; and the problem of color cast of the display panel under a non-positive viewing angle is improved.

An organic EL display device (10) is provided with first and second drivers (1, 2), a multitude of switching circuits (US, DS) and a control circuit (5). The first and second drivers are provided with a multitude of output terminals (P). The multitude of switching circuits alternately connect n-number of the output terminal(s) of the first driver (1) (n is an integer of 1 or more) with one and the other of driving lines, which are of the 2n number of organic EL elements and are divided into two, and alternately connect n-number of the output terminal(s) of the second driver (2) with the remaining n-number of the other and the one of the driving lines. The control circuit (5) controls the multitude of switching circuits to switch at the same time by generating a control signal by m frame(s) (m is an integer of 1 or more) or by m horizontal line(s). Thus, brightness variation and brightness nonuniformity can be reduced.

An organic light emitting display apparatus comprises an organic light emitting display panel including a plurality of pixels each including an emission transistor that controls a timing in which an organic light emitting diode emits light; a gate driver outputting gate pulses to a plurality of gate lines provided in the organic light emitting display panel; an emission driver provided in the organic light emitting display panel and outputting an emission signal that controls turn-on and turn-off of the emission transistor to an emission line connected to the emission transistor; a data driver outputting data voltages to a plurality of data lines provided in the organic light emitting display panel; and a controller supplying a first signal and a second signal to the emission driver through one transfer line, wherein the first signal is generated for driving the emission driver when each frame starts, and the second signal is generated for driving the emission driver and has a period shorter than one frame period, and wherein the emission driver generates the emission signal through an emission start signal transferred through the one transfer line.

A display device includes: a substrate including a display area and a non-display area; and a plurality of sub-pixels arranged in the display area and including portions of an electrode disposed over the display area. The plurality of sub-pixels includes a first sub-pixel and a second sub-pixel to emit light of the same color, a first portion of the electrode of the first sub-pixel has a thickness different from a thickness of a second portion of the electrode of the second sub-pixel, and the first sub-pixel has a size different from a size of the second sub-pixel.

The invention discloses a spraying-free colored aluminum pigment and a preparation method thereof. The spraying-free colored aluminum pigment comprises the following components by weight: 50-65 partsof aluminum powder; 10-20 parts of polyacrylic resin; 5-10 parts of polycarbonate; 7-15 parts of an organic pigment; 1-2 parts of aziridine; 0.5-1 part of melamine; and 1-2 parts of a silane couplingagent. The spraying-free colored aluminum pigment has very excellent dispersity and fluidity when subjected to melt injection molding after being mixed with resin, so that the surface color of an obtained colored resin product is bright and uniform, small in brightness deviation and excellent in metal appearance, and flow marks and weld lines can be avoided. The preparation method of the spraying-free colored aluminum pigment provided by the invention is simple and practical, and low in implementation cost.

An electroluminescence display apparatus includes a display panel including a plurality of pixels connected to a first power line, a power circuit converting a final feedback driving voltage input through a first input terminal thereof to output a high level driving voltage to a first position of the first power line through a first output terminal thereof, and a feedback control circuit receiving the high level driving voltage as a first feedback driving voltage, receiving a second feedback driving voltage from a second position of the first power line, and supplying the first input terminal of the power circuit with the final feedback driving voltage adjusted based on a first output contribution rate of the first feedback driving voltage and a second output contribution rate of the second feedback driving voltage.