OLED Shift Register Circuit Reducing Bezel Area
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Solution Overview
Problem
The complexity and size of the gate-in-panel (GIP) circuit in OLED displays increase due to the large number of scan signals required, leading to a larger bezel area in the display panel.
Innovation Solution
The OLED display employs a shift register configuration that supplies scan signals and emission control signals to pixels on adjacent horizontal lines, reducing the number of emission control signal stages and thereby decreasing the size of the bezel area by half.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a gate-in-panel (GIP) circuit is implemented to generate scan signals and emission control signals, then the display function is enabled, but the circuit complexity and bezel area increase due to the large number of scan signals required
Solution Approach 1:
The patent merges the generation of first scan signals and second scan signals into a single shift register circuit. The shift register sequentially outputs first scan signals to first scan lines and second scan signals to second scan lines, combining what would traditionally require separate GIP circuits into one integrated unit, thereby reducing overall circuit complexity and bezel area
Solution Approach 2:
The shift register is designed to perform multiple functions: it generates both first scan signals and second scan signals, and also generates emission control signals. This multi-functional approach replaces what would traditionally require multiple dedicated circuits, reducing the overall GIP circuit complexity while maintaining full display functionality
2Adaptability or versatility
If a gate-in-panel (GIP) circuit is implemented to generate scan signals and emission control signals, then the display function is enabled, but the bezel area increases due to the large number of scan signals required
Solution Approach 1:
The patent merges the generation of first scan signals and second scan signals into a single shift register circuit. The shift register sequentially outputs first scan signals to first scan lines and second scan signals to second scan lines, combining what would traditionally require separate GIP circuits into one integrated unit, thereby reducing overall circuit complexity and bezel area
Solution Approach 2:
The shift register is designed to perform multiple functions: it generates both first scan signals and second scan signals, and also generates emission control signals. This multi-functional approach replaces what would traditionally require multiple dedicated circuits, reducing the overall GIP circuit complexity while maintaining full display functionality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for a reduction in the total area of the shift register and the bezel area, enhancing the compactness of the display panel without compromising the driving of pixels on multiple horizontal lines.
Implementation Method 1
an organic light emitting diode (OLED) display includes organic light emitting diodes (OLEDs) capable of emitting light by themselves
Data Source
AI summary
An organic light emitting diode display is discussed. The organic light emitting diode display includes a display area, in which first scan lines, second scan lines, and emission lines are disposed to intersect data lines, and pixels are disposed in a matrix, a data driver supplying a data voltage to the data lines, and a shift register supplying a first scan signal to the first scan lines, supplying a second scan signal to the second scan lines, and supplying an emission control signal to the emission lines. The shift register includes first scan signal stages sequentially supplying the first scan signal to pixels arranged on two adjacent horizontal lines, second scan signal stages sequentially supplying the second scan signal to the pixels, and an emission control signal stage simultaneously supplying the emission control signal to the pixels.