Data Driver and Display Device including the same

The driving unit with a voltage selection and offset voltage adjustment mechanism stabilizes data voltage resolution and reduces color coordinate dispersion, addressing gamma resolution issues and improving display quality.

KR102990968B1Active Publication Date: 2026-07-15LG DISPLAY CO LTD
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Patent Information

Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
LG DISPLAY CO LTD
Filing Date
2021-12-29
Publication Date
2026-07-15

AI Technical Summary

Technical Problem

Existing display technologies fail to address the challenges of gamma resolution degradation and color coordinate dispersion during optical compensation, thereby reducing the dispersion of color coordinates during optical compensation and increasing the probability of producing good quality products.

Method used

The proposed solution involves a driving unit comprising a voltage selection unit, an offset voltage selection unit, and a voltage addition unit to stabilize and output data voltage, with a voltage generation unit that generates multiple grayscale voltages and an offset voltage selection unit that adjusts in response to changes in high potential voltage, ensuring consistent data voltage resolution and reducing color coordinate dispersion.

Benefits of technology

The solution improves gamma resolution degradation by maintaining consistent data voltage resolution and reducing color coordinate dispersion, enhancing the quality of display products.

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Abstract

The present invention may provide a light-emitting display device comprising: a display panel for displaying an image; and a driving unit for driving the display panel, wherein the driving unit comprises a voltage selection unit for selecting and outputting one of a plurality of grayscale voltages, an offset voltage selection unit for outputting one of internally set voltages as an offset voltage corresponding to a register value applied from the outside, and a voltage addition unit for adding the grayscale voltage output from the voltage selection unit and the offset voltage output from the offset voltage selection unit to output a data voltage.
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