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1112results about How to "Avoid flickering" patented technology

Method and apparatus for stereoscopic display using column interleaved data with digital light processing

The invention has two main embodiments, a first called column switching and blanking and a second embodiment called doubling. The first embodiment is a projector for displaying a stereoscopic image with projector using one or more digital micromirror devices positioned into a plurality of columns and rows. The projector itself includes a light source, an optical system, a video processing system and a data system for driving the micromirror devices. The data subsystem provides separate data to a plurality of column pairs of the micromirrors. The projector includes a stereoscopic control circuit having a first state of the control circuit for inputting a first eye view of the stereoscopic image and causing the micromirrors of a first column of each column pair to be in various on and off states during said first eye view of said stereoscopic image and for causing all of said micromirrors of a second column of each column pair to be in an off state during said first eye view of said stereoscopic image. A second state of the control circuit is used for inputting a second eye view of the stereoscopic image and causes the micromirrors of the second column of each column pair to be in various on and off states during the second eye view of the stereoscopic image and for causing all of the micromirrors of the first column of each column pair to be in an off state during the second eye view of said stereoscopic image. The second embodiment is a projector for displaying a stereoscopic image with the projector using one or more digital micromirror devices positioned into a plurality of columns and rows. The projector includes a light source, an optical system, a video processing system and a data system for driving said micromirror devices. The data subsystem provides separate data to a plurality of column pairs of the micromirrors. The projector includes a stereoscopic control circuit having a first state for inputting a first eye view of the stereoscopic image and causing each micromirror of each column pair to be in various but identical on and off states during said first eye view of said stereoscopic image. A second state of the control circuit for inputs a second eye view of the stereoscopic image and causes each micromirror of each column pair to be in various but identical on and off states during the second eye view of the stereoscopic image.
Owner:DIVELBISS ADAM W +1

Three-dimensional terrain model real-time smooth drawing method with combination of GPU technology

InactiveCN105336003ATroubleshoot preprocessing issuesEliminate noise3D modellingVideo memoryEngineering
The invention provides a three-dimensional terrain model real-time smooth drawing method with combination of a GPU technology, and belongs to the technical field of image processing. The objective of the invention is to provide the three-dimensional terrain model real-time smooth drawing method with combination of the GPU technology so that cache reuse in multiple times of drawing can be realized based on the current popular programmable GPU technology with a global digital elevation model acting as a data source, and load of computation space is effectively reduced. The method comprises the steps of construction of a multi-resolution pyramid model, elimination of image noise points, filtering of images, partitioning of planar projection of the earth according to equal latitude and longitude, and construction of different hierarchical levels of pyramid layers according to a mode from the top to the bottom. Acceleration and enhancement of terrain rendering are realized based on the programmable GPU technology, i.e. all phases of a graphical drawing pipeline are controlled by using shader languages, two and textures are respectively generated by vertex information and index information of elevation data to be stored in video memory for scheduling of whole terrain drawing; and vertex interpolation and migration are performed in the geometric phase by utilizing a curved surface subdivision and fractal technology so that procedural details are generated and the phenomenon of edges and corners of the terrain mesh when resolution is insufficient can be compensated.
Owner:PLA AIR FORCE AVIATION UNIVERSITY

Backlight driving method and backlight module as well as television

InactiveCN103050095AThe effect of small brightness changesAvoid the problem of backlight flickeringStatic indicating devicesNon-linear opticsGray levelComputer science
The invention provides a backlight driving method and a backlight module as well as a television. On regional backlight controlled display equipment, a plurality of backlight source units are respectively corresponded to multiple areas of a display panel, and each regional backlight can be independently controlled. The gray level values of the first many frames of image signals of a displayed image in each area are stored in a buffer, then the gray levels of the first many frames of image signals and the gray level of the current frame of an image signal in the area are subjected to weighted mean processing, and a first gray level value of the display area is obtained. The first gray level value is provided with a plurality of image signals subjected to the weighted mean processing, thus the gray level value change of the image signal of the current frame has less effect on the first gray level value with the weighted mean. Since the first gray level value is used for controlling the backlight brightness of the area, the effect on the backlight brightness of the area is less, and the problem that the blinking sensibility of backlight caused by that the backlight brightness changes greatly along with the great change of the gray level value on the images of the front frame and the rear frame is prevented.
Owner:HISENSE VISUAL TECH CO LTD
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