Brightness adjusting method of OLED display device and OLED display device

Abstract

The invention provides a brightness adjusting method of an OLED display device and an OLED display device. A static pattern is divided into a central region and a gradual changing region encircling the central region; and the brightness of the central region is reduced directly to needed static brightness and the brightness of the gradual changing region is reduced uniformly and gradually from brightness in a normal mode to static brightness from a position far away from the central region to a position close to the central region. Therefore, aging of an OLED display panel due to long-time static pattern displaying can be delayed and abnormal displaying caused by sudden changing of edge brightness of the static pattern can be avoided.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method for adjusting brightness of an OLED display device and the OLED display device. Background technique [0002] The flat panel display device has many advantages such as thin body and power saving, and has been widely used. Existing flat panel display devices mainly include liquid crystal display devices (Liquid Crystal Display, LCD) and organic light emitting diode display devices (Organic Light Emitting Display, OLED). [0003] OLED display devices generally include: a substrate, an anode disposed on the substrate, a hole injection layer disposed on the anode, a hole transport layer disposed on the hole injection layer, a light emitting layer disposed on the hole transport layer, a device An electron transport layer on the light emitting layer, an electron injection layer on the electron transport layer, and a cathode on the electron injection layer. The light-emittin...

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Problems solved by technology

[0004] The brightness of the OLED display device decays with the prolongation of the light-emitting time, so when the OLED panel displays a static pattern for a long time, it is easy to produce afterimage due to the different degrees of aging in different areas

At present, there is a method to delay the afterimage of the OLED panel, which is to detect the static pattern displayed and reduce its brightness, thereby slowing down the aging speed of the OLED in this area. When there are dynamic patterns and static patterns on the screen at the same time, it may cause abnormal display, for example, the common scrolling news or advertisements under the TV, such as figure 1 As shown, this kind of scrolling news usually includes: text 100 scrolling in the middle part, and solid-color borders 200 on both sides, wherein the text 100 is judged as a dynamic pattern because it is always scrolling, and the border 200, The system will judge it as a static pattern. If the brightness of the border 200 is directly reduced at this time, a sudden change in brightness will occur at the junction of the text 100 and the border 200, which will affect the display effect.

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