OLED display panel

Abstract

The invention provides an OLED display panel. The OLED display panel comprises a plurality of sub-pixels arranged in an array, a plurality of scanning signal lines, a plurality of light-emitting signal lines, a plurality of first driving voltage lines, a plurality of data signal lines, at least one second driving voltage line and at least one third driving voltage line, wherein the scanning signallines, the light-emitting signal lines and the first driving voltage lines extend in the horizontal direction, and the data signal lines, the second driving voltage lines and the third driving voltage lines extend in the vertical direction, wherein each scanning signal line is connected with a row of sub-pixels, each light-emitting signal line is connected with a row of sub-pixels, each first driving voltage line is connected with a row of sub-pixels, and each data signal line is connected with a column of sub-pixels; the first driving voltage line corresponding to each row of sub-pixels is connected with the second driving voltage line through a first thin film transistor; and the first driving voltage line corresponding to each row of sub-pixels is connected with the third driving voltage line through a second thin film transistor, so that brightness deviation or color deviation of the sub-pixels during light emitting can be avoided.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED display panel. Background technique [0002] Organic Light Emitting Display (OLED) display panel, referred to as OLED panel, has self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, and wide operating temperature range. It can realize many advantages such as flexible display and large-area full-color display, and is recognized by the industry as a display device with the most development potential. [0003] The OLED is a current-driven device. When a current flows through the OLED, the OLED emits light, and the brightness of the light is determined by the current flowing through the OLED itself. Such as figure 1 As shown, the existing OLED display panel includes: a plurality of sub-pixels 10' arranged in an array, a plurality of scanning signal lines 200' extending in the horizon...

AI Technical Summary

Problems solved by technology

However, in actual situations, there is a voltage drop in the vertical direction of the driving voltage lines 60 ′, that is, each driving voltage line 60 ′ provides a driving voltage for a column of sub-pixels 10 ′, and the pixel driving current will flow through the driving voltage lines 60 ′. There is resistance in the voltage line 60' itself, so the driving voltage corresponding to a column of sub-pixels 10' will gradually decrease along the vertical direction, resulting in a certain deviation in the voltage of the data signal actually written into the pixel driving circuit, which in turn causes the display screen Have brightness deviation or color deviation

In addition, a plurality of driving voltage lines 60' are connected through a driving voltage connecting line 61' extending in the horizontal direction, so there is also a voltage drop in the driving voltage in the horizontal direction.

The driving voltage connection line 61' is arranged in the non-display area of ​​the OLED display panel. In order to minimize the voltage drop in the horizontal direction and reduce the resistance of the driving voltage connection line 61', it is necessary to use a wider driving voltage connection line 61'. This layout is not conducive to the design of narrow bezel displays

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