LCD Panel Sub Gate-Line Segmentation for Crosstalk Reduction
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Solution Overview
Problem
Existing liquid crystal display (LCD) devices face issues with horizontal and vertical crosstalk, as well as high power consumption, due to inversion methods like dot, line, column, frame, Z-inversion, and active level shift (ALS) methods, which cause various problems such as crosstalk, power inefficiency, and image quality degradation.
Innovation Solution
The proposed solution involves an LCD panel with a unique configuration of sub gate-lines, gate-lines, odd, and even data-lines, where data signals of the same polarity are applied to odd and even column row-pixels with an interval of one horizontal period in a row direction, and alternate polarities are applied to column-pixels in a column direction, utilizing a charge-sharing control circuit to manage electric charges and reduce pulse repetition frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional inversion methods (dot, line, column, frame, Z-inversion, ALS) are used to periodically invert polarities of data signals, then liquid crystal capacitor deterioration due to polarization is reduced or prevented, but horizontal crosstalk, vertical crosstalk, and unnecessary power consumption occur
Solution Approach 1:
The display panel is divided into two independent scanning systems: an odd field scanning system for odd-numbered data lines and an even field scanning system for even-numbered data lines. These two systems operate alternately, with each system completing its scanning period before the other begins. This segmentation prevents simultaneous scanning of adjacent lines, thereby eliminating horizontal crosstalk while maintaining the polarity inversion benefits for liquid crystal capacitor durability.
Solution Approach 2:
The patent implements periodic alternation between the odd field scanning system and the even field scanning system. Each system operates for a complete scanning period, then alternates to the other system. This periodic action ensures that polarity inversion is maintained over time (protecting against capacitor deterioration) while preventing simultaneous operations that would cause horizontal crosstalk.
2Reliability
If conventional inversion methods are used to periodically invert polarities of data signals, then liquid crystal capacitor deterioration due to polarization is reduced or prevented, but unnecessary power consumption occurs
Solution Approach 1:
By segmenting the scanning into two separate fields (odd and even) that operate alternately rather than simultaneously, the patent reduces the overall scanning activity and associated power consumption while still achieving the necessary polarity inversion for capacitor protection.
Solution Approach 2:
The periodic alternation between odd and even field scanning systems allows the display to maintain polarity inversion benefits while reducing continuous scanning operations, thereby lowering unnecessary power consumption compared to conventional methods that scan all lines continuously.
3Productivity
If data signals are applied to all data lines simultaneously, then scanning efficiency is high, but horizontal crosstalk occurs between adjacent data lines
Solution Approach 1:
The patent segments the data lines into two distinct groups (odd-numbered and even-numbered) and assigns separate scanning periods to each group. This segmentation ensures that adjacent data lines are never scanned simultaneously, eliminating horizontal crosstalk while maintaining acceptable scanning efficiency through the alternating field approach.
Solution Approach 2:
The patent employs periodic alternation between scanning odd data lines and scanning even data lines. Each scanning period is dedicated to one field, ensuring that no two adjacent lines are active simultaneously. This periodic structure eliminates horizontal crosstalk while preserving overall scanning efficiency through systematic alternation.
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 effectively reduces or prevents horizontal and vertical crosstalk while efficiently reducing power consumption, leading to improved image quality and extended panel lifespan by minimizing deterioration of liquid crystal capacitors.
Implementation Method 1
A liquid crystal display (LCD) device displays an image by forming an electric field (i.e., an electric potential difference) between a pixel electrode and a common electrode of a liquid crystal capacitor included in each pixel
Implementation Method 2
a liquid crystal layer is placed between the pixel electrode and the common electrode so that light transmittance of the liquid crystal layer is controlled by an intensity of the electric field formed between the pixel electrode and the common electrode
Data Source
AI summary
A liquid crystal display (LCD) panel is disclosed. The LCD panel includes a plurality of pixels arranged in rows and columns, a first sub gate-line coupled to first row-pixels that are adjacent to a lower side of the first sub gate-line, a second sub gate-line coupled to second row-pixels that are adjacent to an upper side of the second sub gate-line, a plurality of gate-lines between the first sub gate-line and the second sub gate-line, a plurality of even data-lines coupled to first column-pixels that are adjacent to the even data-lines, and a plurality of odd data-lines coupled to second column-pixels that are adjacent to the odd data-lines. Here, each gate-line of the plurality of gate lines is coupled to first row-pixels that are adjacent to a lower side of the gate-line and second row-pixels that are adjacent to an upper side of the gate-line.