Method for determining nonuniform-brightness pixel points in display screen
A determination method and display technology, applied in static indicators, instruments, etc., can solve problems such as inconsistent threshold voltage, different current values, and carrier mobility variation, and achieve the effect of eliminating background effects.
Active Publication Date: 2015-11-18
TRULY HUIZHOU SMART DISPLAY
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Problems solved by technology
However, at present, due to the limitation of the AMOLED process level, the threshold voltage of each pixel driving TFT is inconsistent, the carrier mobility changes, the power line IR-drop, the OLED threshold drift, etc., which leads to the input of the same data signal and the generation of TFT The current value is different, resulting in uneven brightness of the display
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[0021] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.
[0022] see figure 1 , which is a flowchart of a method for determining pixels with uneven brightness in a display screen in an embodiment.
[0023] A method for determining uneven brightness pixels (mura points) in a display screen, comprising the steps of:
[0024] S110: Obtain the lum...
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The invention discloses a method for determining nonuniform-brightness pixel points in a display screen. The method comprises the following steps: respectively obtaining the brightness value of each pixel point in an image output by the display screen to form an initial brightness matrix, and dividing the display screen into a plurality of pixel set areas; performing frequency domain filtering processing on the initial brightness matrix to obtain a background brightness matrix; and carrying out difference operation on the initial brightness matrix and the background brightness matrix, respectively counting pixel points with a difference between the initial brightness matrix and the background brightness matrix greater than zero and a quantity smaller than the difference and smaller than zero or pixel points with a difference smaller than zero ad a quantity smaller than the difference and greater than zero in each pixel set area to obtain the nonuniform-brightness pixel points in the display screen. According to the method for determining the nonuniform-brightness pixel points in the display screen, background influences are eliminated through subtraction of the background brightness matrix from the initial brightness matrix, and the nonuniform-brightness pixel points in the display screen can be quite accurately and directly obtained.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a method for determining pixels with uneven brightness in a display screen. Background technique [0002] OLED (Organic Light Emitting Diode) is an organic light-emitting diode. The principle of light emission is: use ITO transparent electrodes and metal electrodes as the anode and cathode of the device respectively, and under a certain voltage drive, electrons and holes are injected from the cathode and anode to the electron and hole transport respectively. layer, electrons and holes respectively migrate to the light-emitting layer through the electron and hole transport layer, and meet in the light-emitting layer to form excitons and excite light-emitting molecules. [0003] In the era of rapid update of modern display technology, AMOLED (ActiveMatrixOrganicLightEmittingDiode, Active Matrix Organic Light Emitting Diode) display technology has attracted more and more attention ...
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Inventor 常宏韬王月文胡君文苏君海李建华
Owner TRULY HUIZHOU SMART DISPLAY