Light emitting display device and driving method thereof

By introducing a bias stress (OBS) voltage calculator into the light-emitting display device, the OBS voltage is dynamically adjusted based on the driving conditions, which solves the problem of poor flicker characteristics and improves the stability of the gate-source voltage of the driving transistor and the display quality.

CN116266445BActive Publication Date: 2026-05-26LG DISPLAY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LG DISPLAY CO LTD
Filing Date
2022-07-15
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing light-emitting display devices suffer from poor flicker characteristics during the driving process, especially in maintaining a stable gate-source voltage of the driving transistor under different driving conditions.

Method used

By introducing a bias stress (OBS) voltage calculator, the optimal OBS voltage is calculated based on driving conditions such as refresh rate, data signal, and gamma value. Multiple OBS voltages are applied in different driving cycles to stabilize the gate-source voltage of the driving transistor, including dynamic adjustment of the first to fourth OBS voltages.

Benefits of technology

It effectively improves the flicker characteristics of the display device and maintains the gate-source voltage of the driving transistor at the optimal level, thereby improving the display quality.

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Abstract

A light emitting display apparatus and a driving method thereof, the light emitting display apparatus including a display panel configured to display an image, a timing controller including an offset stress (OBS) voltage calculator configured to calculate an optimal OBS voltage value based on a refresh rate of the display panel and a data signal to be provided to the display panel, and a power supply configured to generate the optimal OBS voltage to be provided to the display panel based on the OBS voltage value.
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