67results about How to "Compensate brightness" patented technology

The embodiment of the invention provides a luminance compensation method and a self-illumination display device, and relates to the technical field of display devices. According to the luminance compensation method and the self-illumination display device, attenuation difference of self-illumination elements in all areas after the self-illumination display device works for a long time can be reduced, and the lumpy mura phenomenon occurring after a displayer of the self-illumination display device works for a ling time can be avoided. The luminance compensation method comprises the steps of obtaining a pre-stored compensation factor table of the self-illumination display device, wherein the compensation factor table comprises compensation factors of N areas, the compensation factor of the area with the temperature higher than the temperature of a standard area is smaller than G, and the compensation factor of the area with the temperature lower than the temperature of the standard area is larger than G; compensating for the luminance of images displayed in all the N areas according to the compensation factor table. The luminance compensation method is used for compensating for the luminance of the self-illumination display device.

The invention discloses a display device pixel brightness compensation control method and device. The method and device are used for the compensation for backlight brightness of a liquid crystal display panel through white sub pixels and improving display quality of images. The display device pixel brightness compensation control method includes the steps that the white sub pixels in a pixel unit are driven to compensate the pixel unit where the white sub pixels are located for brightness according to the pixel unit with brightness to be compensated for in a pre-determined display device and compensation gray scale voltage corresponding to compensation brightness of the pixel unit.

A drive circuit of a liquid crystal display device performs line inversion drive based on a correction video signal V. A look-up table (12) includes two types of tables having stored therein correction values for use in overshoot drive. Based on a current-frame video signal X, a previous-frame video signal Y stored in a frame memory (11), and a polarity-reversing signal REV, a correction process portion (13) reads a correction value from the look-up table (12), and outputs the correction value being read as the correction video signal V. In such a manner, a correcting circuit (10) is used to control the degree of overshoot in accordance with the polarity-reversing signal REV. Thus, it is possible to suitably control the change in pixel brightness regardless of the polarity of the applied voltage, thereby preventing any fringes from being generated while displaying moving images.

The invention relates to an energy saving lamp box control circuit which comprises a PWM pulse formation module used for generating a PWM pulse signal and an LED constant current driving module which is controlled by the PWM pulse signal and drives LED operation. The control circuit also comprises an adaptive light modulation module which comprises a first light-sensitive device. The adaptive light modulation module is connected with the PWM pulse formation module and is used for sensing environment light intensity, and generating a light modulation voltage signal to control a duty ratio of the PWM pulse signal generated by the PWM pulse formation module so as to carry out light modulation. In the invention, through additionally adding the adaptive light modulation module, a lamp box has an adaptive light modulation function, the darker an environment, the brighter the lamp box, and vice versa, thus an effect of an advertisement is optimized. The control circuit also has a light control function (when ambient brightness reaches a set value, a lamp box is closed automatically), a sound control function (when ambient sound reaches a set value, the lamp box is lighted) and an LED light decay compensation function.

The invention discloses a method for driving a pixel circuit of an active organic electroluminescence displayer. The method comprises a plurality of major cycles and each major cycle comprises N frames. In the first frame, programming is conducted through an initialization stage, a threshold voltage latching stage, a data loading stage and an organic light-emitting diode lighting stage, wherein the threshold voltage latching stage is separated from a signal scanning stage; in the second frame to the Nth frame, programming is conducted only through an data loading stage and an organic light-emitting diode lighting stage. In terms of a whole pixel array, when an initialization step of pixels on the ith row is completed, the initialization step of pixels on the i+1th row is conducted. According to the method for driving the pixel circuit of the active organic electroluminescence displayer, threshold voltage drift of a driving transistor and degeneration of an organic light-emitting diode can be made up, the display quality is guaranteed, the power consumption can also be reduced, and the programming speed is effectively improved.

The invention discloses a brightness compensation method and device of a display panel and a display module, the display panel comprises at least two display areas, and the first display area is connected with a feedback circuit. The brightness compensation method comprises the following steps: calculating a brightness attenuation value of a first display area according to equivalent working timeof the first display area; calculating the gray scale variation of the first display area according to the brightness attenuation value; and according to the gray scale variation, performing inverse proportion amplification on the input voltage of the first display area by using a feedback circuit to reach a preset voltage value. Brightness attenuation value according to equivalent working time ofthe first display area is calculated. The gray scale variation is calculated according to the brightness attenuation value, and the input voltage of the first display area is amplified in inverse proportion by using the feedback circuit, so that the voltage input quantity is increased, the purpose of increasing the light-emitting current of the first display area is achieved, and the brightness of the first display area is compensated and is consistent with the brightness of the second display area.

The embodiment of the invention discloses a display device, a driving method thereof and an electronic device. The display device comprises a backlight module and a display panel. The display panel comprises a display area. The display area comprises a plurality of pixels, each pixel at least comprises a first color sub-pixel, and the display area comprises a first display area and an edge displayarea surrounding the first display area. The driving method comprises the steps of receiving a to-be-displayed image and obtaining an input gray scale P1i of each first color sub-pixel located in anedge display area in the to-be-displayed image; according to the brightness offset parameter and the input gray scale P1i of the first color sub-pixel, adjusting the output gray scale P1o of the firstcolor sub-pixel according to the following formula, k being a color offset degree value, and the brightness offset parameter being smaller than 1. In the embodiment of the invention, the phenomenon of darkening of the edge display area in the display stage is improved, and the display effect is optimized.

A regional dimming driving method for a display device is provided. The display device includes multiple backlight sources respectively corresponding to multiple display regions of the display device. The regional dimming driving method includes acquiring a brightness value of each display region according to input image data, processing and adjusting the brightness value of each display region to acquire an adjusted brightness value of regional dimming of each display region, and respectively driving the backlight sources according to the adjusted brightness values of regional dimming of the corresponding display regions. By processing and adjusting the brightness values of the display regions, display effects can be effectively provided.

For improving the brightness decay of a display due to its aging, a non-volatile memory such as Flash can be used to store a brightness accumulation value of each point of the display, and each point can be compensated for its brightness accordingly. However, the non-volatile memory suffers from incorrect write-in data or temporary power disconnection, and thus the error will exist all the time to make the display non-even. Hence, the present invention uses a multiple data backups and CRC error detection, plus new/old data comparison to protect data the non-volatile memory from incorrect brightness compensation value so as to uniform the brightness of the display.

The invention provides a brightness compensation method, a brightness compensation device and a brightness compensation system of a display panel, relates to the technical field of display, and is used for solving the technical problem of color cast of an auxiliary screen area. The brightness compensation method of the display panel comprises the following steps: acquiring at least two of the actual temperature, the actual frame rate and the actual display brightness value of the display panel and the working time of the display panel; according to at least two of the acquired actual temperature, the actual frame rate and the actual display brightness value, the working time and a pre-stored corresponding relation of brightness compensation coefficients along with time, acquiring a brightness compensation coefficient corresponding to a secondary screen area; and performing brightness compensation on the secondary screen area according to the brightness compensation coefficient. By comprehensively considering a plurality of factors influencing brightness attenuation, such as temperature, frame rate, display brightness value and the like, and reflecting the factors in the brightness compensation coefficient, the brightness of the auxiliary screen area is compensated more comprehensively and accurately, the color cast degree of the auxiliary screen area is reduced, and the brightness uniformity of the display panel is improved, so that the display effect is improved.

A light source control apparatus and a method for controlling light source are provided. The light source control apparatus is used to controlling N light-emitting devices connected in series. N+1 nodes are sequentially defined at two terminals of each light-emitting device mentioned above, where N is a natural number. The light source control apparatus includes a testing circuit and a compensation circuit. The testing circuit is coupled to the nodes to transmit a testing current to light-emitting devices between Ith node and Jth node, where I and J are natural numbers, and N+1>=J>I>=1. The compensation circuit is coupled to the nodes to measure a brightness of light-emitting devices between Ith node and Jth node, decide a value of a compensation current according to an intensity of the brightness, and provide the compensation current to light-emitting devices between Ith node and Jth node.

A plasma display panel comprising: a front panel comprising a first substrate, a first electrode, a first dielectric layer and a protective layer wherein the first electrode is formed on the first substrate, the first dielectric layer is formed over the first substrate so as to cover the first electrode, and the protective layer is formed on the first dielectric layer; and a rear panel comprising a second substrate, a second electrode, a second dielectric layer and a phosphor layer wherein the second electrode is formed on the second substrate, the second dielectric layer is formed over the second substrate so as to cover the second electrode, the phosphor layer is formed on the second dielectric layer, wherein the front panel and the rear panel are disposed so that the protective layer and the phosphor layer are opposed to each other, and thereby a discharge space is formed between the front panel and the rear panel; characterized in that at least the first dielectric layer has a carbon concentration of from 10³ ppm to 10⁵ ppm. According to the present invention, there is no cracking or yellowing in the first dielectric layer of the plasma display panel.

The invention discloses a pixel structure, a display screen and a method for adjusting luminance uniformity of the display screen. The pixel structure comprises a white-light backboard, an optical sensor and an optical filter, wherein the white-light backboard is used for emitting white light; the side, from which the white light is emitted, of the white-light backboard is regarded as a front side; a plurality of white-light sub-pixel layers, which are arranged side by side, are arranged on the front side of the white-light backboard, and the white-light sub-pixel layers are used for offeringwhite-light sub-pixels; the optical sensor is arranged on the front side of the white-light backboard; the optical sensor is used for acquiring luminance of the various white-light sub-pixels; the optical filter is arranged in a mode of being opposite to the front side of the white-light backboard; the optical filter comprises a plurality of sub-pixel layers which are arranged side by side; each sub-pixel layer is opposite to the position of each white-light sub-pixel layer; and the plurality of sub-pixel layers are different in color. According to the invention, the luminance uniformity of the display screen is improved.

A backlight module, suitable for supplying a plane light source. The backlight module has a light guide plate, a reflection mask and a light compensator. The light source is disposed next to a side surface of the light guide plate, such that the light generated thereby is incident on the side surface of the light guide plate, transmitted through the bottom surface, and projecting from the top surface of the light guide plate. The reflection mask is disposed next to the sidewall of the light guide plate to cover the light source. The light compensator is disposed in the reflection mask. By disposing the light compensator with multiple reflection planes in the reflection mask or forming multiple reflection surfaces of the reflection mask, the brightness at the two comers of the light guide plate near the two sides of the light source can be compensated.

In a method and apparatus for improving the brightness uniformity in an image, signals are acquired using a radio frequency receiving coil, and noise in the acquired signals is normalized so as to produce an image, then the brightness of various pixels in the image is determined according to the sensitivity of the radio frequency receiving coil. The brightness of the image is then made uniform by compensating the brightness of the various pixels in the image.

A planar light source including a transflective film, a plurality of cold cathode fluorescence flat lamps and at least one reflective component to provide a uniform light source is described. A portion of the light emitted from the emitting areas of the cold cathode fluorescence flat lamps passes through the transflective film, and the other portion of the light is reflected to the reflective component by the transflective film. Then, the light is reflected to the dark areas between the emitting areas to compensate the brightness of the dark areas. When the brightness of the dark areas is compensated, the planar light source provides a uniform light without dark stripes.

A luminance compensating method of compensating a de-interlaced pixel in a current block of a current frame with reference to a reference block of a reference frame is provided. First, calculate an average luminance of the current block and an average luminance of the reference block. Next, adjust the luminance of the de-interlaced pixel by a luminance difference between the average luminance of the current block and the average luminance of the reference block, such that the luminance of the de-interlaced pixel is more appropriate and the display quality is improved.

Embodiments of the invention disclose a brightness compensation method, a display and a computer storage medium. The brightness compensation method is applied to the display; a pixel back plate of thedisplay is provided with holes; and a substrate of the display is provided with a detection device. The brightness compensation method comprises the following steps: after a driving current is accessed, reflected light corresponding to light-emitting pixels is detected through the detection device to obtain reflected light parameters corresponding to the reflected light; real-time parameters corresponding to the light-emitting pixels are obtained according to size parameters corresponding to the holes and the reflected light parameters; and the driving current is adjusted according to the real-time parameters so as to carry out brightness compensation.