Method, system, driver chip, and control card for solving dynamic screen line darkening phenomenon
A technology for driving chips and control cards, applied in static indicators, instruments, etc., can solve problems such as uneven spacing and dark lines, and achieve the effect of improving uniformity and avoiding dark lines on dynamic screens.
Active Publication Date: 2016-03-23
SHENZHEN SUNMOON MICROELECTRONICS
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[0007] The purpose of the embodiments of the present invention is to provide a method for solving the phenomenon of darkening dynamic screen lines, aiming to solve the problem of the existing LED dynamic screen due to the gap between adjacent frames of grayscale data and adjacent sub-periods of one frame of grayscale data. Between, the interval between the time when the last scan line displays valid grayscale data and the time when the first scan line displays valid grayscale data is uneven, resulting in the problem of line darkening
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] Aiming at the problems existing in the prior art, the present invention proposes a method for solving the phenomenon of darkening dynamic screen lines. This method is to change the time when the existing driver chip acquires the grayscale data from the control card or inside the driver chip, or disperse the display time of the grayscale data in each sub-cycle under the condition of maintaining the acquisition time, so as to even out the grayscale data of each sub-cycle. A scan line displays the time interval of valid grayscale data.
[0027] In detail, the method for solving the dynamic scr...
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The invention belongs to the technical field of display drive of a dynamic screen and provides a method for solving a dynamic screen row dark phenomenon, a system thereof, a driving chip, and a control card. According to the method and the system, through changing an existing driving chip, the time of grey data is obtained from the internal part of the control card or the driving chip, or the display time of the grey data in each sub period is scattered in the condition of maintaining obtainment time to homogenize the time interval of displaying effective grey data by each scanning row, thus the homogenization of displaying grey data between dynamic screen scanning rows is improved. Thus, in the display process of each frame of grey data, when each scanning row is started, the starting voltage started at the output port of the driving chip is consistent, and the dynamic screen row dark phenomenon caused by the influence of a port suspended state by output port parasitic capacitor is avoided.
Description
technical field [0001] The invention belongs to the technical field of display driving of a dynamic screen, and in particular relates to a method, a system, a driving chip, and a control card for solving the phenomenon of dark lines on a dynamic screen. Background technique [0002] According to different display control methods, LED display screens can be divided into static screens and dynamic screens: static screens mean that when the display screen displays text, images and videos, the LED lights on the display screen are illuminated at the same time. One LED light corresponds to the constant current control port one by one; the dynamic screen uses the characteristics of human visual persistence to display only a certain line at a certain time, and the next line at the next time until all lines are displayed, and then display the first line. Lines, and so on, cycle display, display the whole picture. Compared with static screens, dynamic screens require fewer constant c...
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IPC IPC(8): G09G3/32
Inventor 石磊吕苏谊符传汇李照华陈克勇方曙
Owner SHENZHEN SUNMOON MICROELECTRONICS