Display Device Sub-Pixel Common Electrode Circuit
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Solution Overview
Problem
Liquid crystal display devices have a narrow viewing angle due to optical anisotropy of liquid crystal molecules, and existing multi-domain region display devices have complex circuitry and high crosstalk between lines.
Innovation Solution
The display device is designed with a first and second substrate having sub-pixels arranged in a matrix, where each sub-pixel includes a first and second subordinate sub-pixel, with different common electrodes and electrode lines connected to different external voltage signals, forming at least two domain regions for wide viewing angles and simplifying the circuit structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multi-domain region structure is used to achieve wide viewing angle, then viewing angle is improved, but circuit complexity increases and crosstalk between lines increases
Solution Approach 1:
The invention divides each sub-pixel into multiple subordinate sub-pixels (first, second, third, fourth) with different orientation directions. Each subordinate sub-pixel is controlled by separate common electrode lines, creating multiple domain regions within a single sub-pixel. This segmentation approach achieves wide viewing angle by controlling liquid crystal molecules in different orientations while maintaining relatively simple circuit structure through shared electrode connections.
Solution Approach 2:
The invention merges the control of multiple common electrodes into a unified structure where adjacent common electrode lines are electrically connected through connection electrodes. Multiple common electrodes (first, second, third, fourth) are combined into groups that share control signals, reducing the number of independent control lines and simplifying the overall circuit architecture while still enabling multi-domain control.
2Manufacturing precision
If multiple common electrodes are used to control different domain regions, then domain control precision is improved, but number of wirings increases
Solution Approach 1:
The invention makes common electrode lines serve multiple functions by having adjacent lines electrically connected through connection electrodes. A single common electrode line can control multiple subordinate sub-pixels across different sub-pixels, and multiple common electrode lines can be controlled by a single external signal line. This multi-functionality reduces the number of external wirings needed while maintaining precise domain control capability.
Solution Approach 2:
The invention introduces connection electrodes as intermediary elements between common electrode lines. These connection electrodes electrically connect adjacent common electrode lines, acting as mediators that allow control signals to be distributed to multiple electrodes through shared lines. This intermediary structure enables precise control of multiple domain regions while reducing the number of external control wirings.
3Manufacturing precision
If complex circuit structure is used to achieve multi-domain control, then domain region control is improved, but crosstalk between lines increases
Solution Approach 1:
The invention segments the display into multiple subordinate sub-pixels with distinct orientation directions, where each segment is controlled by dedicated common electrode lines. This segmentation allows independent control of different domain regions, improving domain control precision while the modular structure helps isolate crosstalk to local areas rather than affecting the entire display.
Solution Approach 2:
The invention uses connection electrodes as intermediary elements that electrically connect adjacent common electrode lines. These intermediaries provide controlled electrical pathways that reduce impedance and signal interference between lines, thereby reducing crosstalk while still enabling coordinated control of multiple domain regions.
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 achieves a wide viewing angle with a simplified circuit structure by reducing the number of wirings and crosstalk, enabling effective control of liquid crystal molecule deflection and improving display performance.
Implementation Method 1
the common electrodes corresponding to the first subordinate sub-pixel and the second subordinate sub-pixel of the same sub-pixel are respectively connected to different external common voltage signals... the common electrode lines corresponding to the first subordinate sub-pixel and the second subordinate sub-pixel of the same sub-pixel are electrically connected to the common electrodes
Implementation Method 2
the pixel electrode and the common electrode line form storage capacitance, for retaining display of a picture of a previous frame when the picture is switched between two frames. The color film substrate includes a common electrode thereon for forming electrical field with the pixel electrode to control the deflection of the liquid crystal molecules
Data Source
AI summary
A display device is disclosed. The display device includes a first substrate (S1) and a second substrate (S2) provided oppositely, and a plurality of sub-pixels (P) arranged in a matrix, wherein the sub-pixels at least include first subordinate sub-pixels and second subordinate sub-pixels; the first substrate is provided with a plurality of common electrodes (Com1, Com2), the first subordinate sub-pixel and the second subordinate sub-pixel of a same sub-pixel (P) respectively correspond to different common electrodes, and the common electrodes corresponding thereto are respectively connected with different external common voltage signal (H); and the second substrate is provided with a plurality of common electrode lines (Com′1, Com′2), the first subordinate sub-pixel and the second subordinate sub-pixel of a same sub-pixel respectively correspond to different common electrode lines, and the common electrode lines corresponding thereto are electrically connected with the common electrodes corresponding thereto, respectively.