OLED Gate Driver Integration for Narrow Bezel Design
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Solution Overview
Problem
The existing organic light emitting diode (OLED) display devices have a large bezel area due to the gate driver, which increases the non-display area and affects the appearance and efficiency of the display.
Innovation Solution
The OLED display device incorporates a gate driver with multiple stages, each stage having a first circuit block generating scan signals and a second circuit block generating emission signals, reducing the number of control signals and lines required, and forming the gate driver in a gate-in-panel (GIP) type within the display panel, thereby minimizing the area occupied by the gate driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the gate driver is formed as a separate unit with scan signal generating unit and emission signal generating unit, then the driving function is complete, but the bezel area increases and appearance is deteriorated
Solution Approach 1:
The patent merges the scan signal generating unit and emission signal generating unit into a single integrated gate driver structure. The gate driver is formed within the display panel area rather than as a separate external unit, combining multiple signal generation functions into one compact block that occupies minimal space in the non-display area.
Solution Approach 2:
The gate driver is designed to perform multiple functions simultaneously - generating scan signals for row selection and emission signals for pixel activation, all within a single integrated circuit block. This multi-functional design eliminates the need for separate dedicated units for each signal type.
2Area of stationary object
If the gate driver area is reduced to improve appearance, then the bezel becomes narrower, but the control signal lines and circuit complexity must be optimized
Solution Approach 1:
The gate driver is segmented into multiple stages, with each stage responsible for generating a specific scan signal and corresponding emission signal for a particular row or column segment. This segmentation allows the large gate driver area to be divided into smaller functional blocks, reducing the overall footprint while maintaining complete driving capability through coordinated operation of all stages.
Data Source
AI summary
An organic light emitting diode display device includes a display panel including a plurality of pixels; a data driver supplying a data signal to the plurality of pixels; a gate driver supplying a plurality of scan signals and a plurality of emission signals to the plurality of pixels, the gate driver including a plurality of stages, at least one of the plurality of stages having a first circuit block generating one of the plurality of scan signals and a second circuit block generating one of the plurality of emission signals using one of the plurality of scan signals; and a timing controller supplying a plurality of control signals to the data driver and the gate driver.