Single-Side Electroluminescent Display Driving with Segmented Gate Lines
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Solution Overview
Problem
Existing electroluminescent displays face challenges in reducing bezel width and maintaining image quality, especially at the right-bottom portion, due to increased data rate and deviation in threshold voltages of transistors, which degrades image quality and lacks sufficient charging time.
Innovation Solution
The implementation of a single-side driving method for electroluminescent displays, where the data driver and gate driver are positioned on the same side of the panel, using a digital driving method that controls light emission time for grayscale representation, and grouping gate lines to reduce data rate and secure charging time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the data driver and gate driver are positioned on opposite sides of the panel, then the signal transmission is stable, but the bezel width increases
Solution Approach 1:
The gate lines are divided into multiple groups (first gate line group, second gate line group, third gate line group) that are driven by different gate drivers. This segmentation allows the gate drivers to be positioned on the same side of the panel while still covering the entire display area, reducing bezel width without compromising signal transmission stability through proper signal routing to each segment.
2Measurement precision
If the data rate is increased to improve resolution, then the image quality improves, but the charging time becomes insufficient and threshold voltage deviation increases
Solution Approach 1:
By segmenting the gate lines into multiple groups driven by different gate drivers, the data rate requirement for each driver is reduced. This allows sufficient charging time to be maintained while still achieving high overall image quality through the combined operation of multiple drivers working in parallel on different segments.
Solution Approach 2:
The patent employs periodic scanning of gate lines in groups, where each gate line group is activated in sequence rather than simultaneously. This periodic action allows the system to maintain high resolution image quality while providing adequate charging time for each segment during its active period, preventing threshold voltage deviation.
3Productivity
If the gate lines are activated simultaneously to improve scanning speed, then the productivity increases, but the threshold voltage deviation increases and image quality degrades
Solution Approach 1:
The gate lines are segmented into multiple groups that are activated in a coordinated sequential manner rather than all simultaneously. This maintains high scanning speed through parallel processing of segments while preventing threshold voltage deviation by ensuring each segment receives proper charging time, thus preserving image quality.
4Ease of manufacture
If the digital driving method is used to simplify the IC structure, then the ease of manufacture improves, but the threshold voltage deviation increases
Solution Approach 1:
The digital driving method is implemented with segmented gate line groups, where each group is driven by a separate gate driver. This maintains the simplicity of digital IC structure while improving threshold voltage consistency by reducing the data rate and charging requirements for each individual driver, thereby minimizing voltage deviation across the display panel.
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 approach reduces bezel width, improves image quality by stabilizing grayscale representation, and optimizes charging time by simultaneously activating multiple gate lines, thereby enhancing the overall performance of the electroluminescent display.
Implementation Method 1
An electroluminescent display can be driven with quick response speed and reduced power consumption, using light-emitting diodes (LEDs) or organic light-emitting diodes (OLEDs) that emit light through recombination of electrons and holes
Data Source
AI summary
An electroluminescent display and a method of driving the same are disclosed. In one aspect, the display includes a display panel including a plurality of pixel units electrically connected to a plurality of data lines and a plurality of gate lines. The pixel units are arranged in a matrix of a plurality of rows and a plurality of columns, the pixel units in the same column are connected to the same data line, and the pixel units in the same diagonal line of the matrix are connected to the same gate line. The display also includes a data driver located at a first side of the display panel, the data driver being configured to drive the data lines, and a gate driver located at the first side of the display panel and configured to drive the gate lines.