69results about How to "Compensate brightness" patented technology

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.

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 camera shooting method achieved through camera shooting elements. The camera shooting elements include a three-primary-color projector, a camera and a regulating module, wherein the three-primary-color projector can emit illumination light of various colors and various kinds of brightness, and the illumination light emitted from the three-primary-color projector is shot on a detected object; the camera is used for shooting the detected object to form an image; the regulating module is used for analyzing the image and regulating the color or the brightness of the illumination light emitted from the three-primary-color projector to carry out light compensation on a local area of the detected object. The image is transmitted to the regulating module, the regulating module presets a threshold value of a grey value of a graphic primitive of the image, the grey value of the graphic primitive in the image of the detected object and the threshold value are compared and analyzed, the regulating module regulates a light-emitting area of a corresponding block in the three-primary-color projector for the local area where the grey value of the image of the detected object is not within the range of the threshold value, and accordingly the clear image of the detected object is shot by means of matching of the method and the camera.

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.

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.

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.

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.