OLED display device and luminance compensation method thereof

A display device and brightness compensation technology, which is applied to static indicators, instruments, etc., can solve problems such as changes in screen brightness and uneven overall display of the screen, and achieve the effect of improving brightness uniformity

Inactive Publication Date: 2016-11-16
KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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Problems solved by technology

[0011] The purpose of the present invention is to provide an OLED display device and its brightness compe

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  • OLED display device and luminance compensation method thereof
  • OLED display device and luminance compensation method thereof
  • OLED display device and luminance compensation method thereof

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Embodiment Construction

[0039]The applicant found that in OLED display devices, affected by the magnitude of the current and the impedance of the power supply wiring, the voltage drop synchronous with the change of the screen current will directly affect the positive power supply voltage (ie, the ELVDD voltage) provided to the pixel unit. As a result, the current changes and affects the brightness of the OLED display device. In different positions of the display area of ​​the screen, the voltage difference caused by the impedance of the power supply wiring is different, which will cause the overall display of the screen to be uneven.

[0040] Based on this, the present application provides an OLED display device and a brightness compensation method thereof. A plurality of detection traces are provided, and each detection trace is connected to a power supply trace at a predetermined position through several switching elements to detect Measure the actual positive power supply voltage of the pixel unit...

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Abstract

The invention provides an OLED display device and a luminance compensation method thereof. The OLED display device is provided with a plurality of detection lines, which are connected to a driving chip. Each detection line is connected to a power supply line arranged on a predetermined position through a plurality of switch elements so as to detect the actual positive power supply voltage of pixel units on the predetermined position. The driving chip obtains a data voltage compensation value of at least part of pixel units according to the detected actual positive power supply voltage and one reference positive power supply voltage, and then provides a data voltage to at least part of pixel units according to the data voltage compensation value so as to improve the luminance uniformity of a whole panel.

Description

technical field [0001] The invention relates to the display field, in particular to an OLED display device and a brightness compensation method thereof. Background technique [0002] Organic Light Emitting Display (OLED) panels, also known as organic electro-laser display devices, have self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, and use It has many advantages such as wide temperature range, flexible display and large-area full-color display, and is recognized by the industry as the display device with the most development potential. [0003] OLED display devices can be divided into two types according to driving methods: passive driving and active driving, namely, direct addressing and thin film transistor (Thin Film Transistor, TFT) matrix addressing. Among them, the active-driven OLED display device is also called an active matrix organic light emitting diode (Active Matrix...

Claims

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Application Information

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IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/0626
Inventor 向东张志华
Owner KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD
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