OLED Display Panel Signal Line Reduction for Screen-to-Body Ratio
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Solution Overview
Problem
The existing AMOLED display technology has a sophisticated unit test circuit design that uses multiple thin-film transistors (TFTs) and signal lines, which reduces the screen-to-body ratio due to increased space occupation.
Innovation Solution
The proposed OLED display device reduces the number of unit test inputting signal lines in the pixel driving circuit from six to four, utilizing a configuration with a data signal line, scanning signal line, pixel array, inputting unit circuit, controlling unit circuit, and outputting unit circuit, where the first and third pixel columns include red and blue subpixels arranged alternately, and the second and fourth pixel columns include green subpixels, with specific clock signals and voltage levels used to control TFTs for image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plurality of thin-film transistors (TFTs) and a plurality of signal lines are adopted in the unit test circuit, then the testing functionality is improved, but the screen-to-body ratio is reduced due to increased space occupation
Solution Approach 1:
The patent merges the unit test circuit functionality into the existing pixel driving circuit by sharing TFTs and signal lines. Specifically, the same TFTs that drive pixel circuits are used to drive unit test circuits, and the same data signal lines and scanning signal lines are used for both pixel driving and unit testing, thereby eliminating the need for separate dedicated test circuit components and improving the screen-to-body ratio while maintaining testing functionality
Solution Approach 2:
The patent implements multi-functionality where the pixel driving circuit serves dual purposes: driving pixel circuits for normal display operation and driving unit test circuits for testing operations. The data signal lines, scanning signal lines, and TFTs are designed to accommodate both functions, making the circuit universal and reducing overall circuit complexity and space requirements
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 effective image detection by red, green, and blue subpixels while increasing the screen-to-body ratio by reducing the number of signal lines, resulting in a display effect comparable to traditional OLED panels.
Implementation Method 1
When an electric current flows by, the organic material emits light
Data Source
AI summary
An organic light-emitting diode (OLED) display device includes a first pixel column, a second pixel column, a third pixel column, a fourth pixel column, and an outputting unit circuit comprising a first outputting signal line, a second outputting signal line, and a third outputting signal line. The first outputting signal line is connected to the first pixel column. The second outputting signal line is connected to the third pixel column. The third outputting signal line is connected to the second pixel column and the fourth pixel column.