LCD Panel Capacitor Placement on Opaque Regions
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Solution Overview
Problem
Conventional LCD panels have a low aperture ratio due to metal common lines that obstruct light transmission, reducing the display's effectiveness.
Innovation Solution
Incorporating photo spacers and capacitors on opaque regions of the substrate, allowing storage capacitances to be formed above these regions without obstructing light, thus maintaining a high aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal common lines are used to form storage capacitance, then storage capacitance is provided, but light transmission is blocked and aperture ratio decreases
Solution Approach 1:
The patent moves the storage capacitance from the planar region (where it would block light) to the vertical dimension by placing capacitors on the side walls of the pixel electrode structure. This dimensional transition allows capacitance formation without compromising the light transmission area, effectively resolving the contradiction between reliability and illumination intensity.
Solution Approach 2:
The patent embeds the storage capacitance structure within the pixel electrode assembly by forming capacitors on the side walls of the pixel electrode. This nesting approach integrates the capacitance function into the existing pixel structure without requiring separate planar space, thereby maintaining high aperture ratio while ensuring reliable storage capacitance.
2Reliability
If common lines are disposed on the substrate, then storage capacitance is formed, but the metal lines obstruct light and reduce display effectiveness
Solution Approach 1:
The patent extracts the storage capacitance function from the traditional metal common line structure and relocates it to the side wall region of the pixel electrode. This extraction removes the harmful light-blocking metal lines from the light transmission path while preserving the essential storage capacitance function, thereby improving display effectiveness without sacrificing reliability.
Solution Approach 2:
By transitioning the capacitance formation from a two-dimensional planar arrangement to a three-dimensional vertical structure on the pixel electrode side walls, the patent eliminates light obstruction while maintaining capacitance functionality, thus resolving the contradiction between reliability and productivity.
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
The solution enhances the aperture ratio of LCD panels, improving image quality by allowing light to pass through while maintaining necessary storage capacitances for electromagnetic field control.
Implementation Method 1
photo spacers are disposed over the opaque region of the substrate
Implementation Method 2
a storage capacitance 140 is formed between the common line 118 and the pixel electrode 116
Implementation Method 3
The liquid crystal layer 130 is control by the electromagnetic field applied from the pixel electrode 116 and the common electrode layer 124, so that the light transmittance can be control
Data Source
AI summary
A liquid crystal display panel comprising a first substrate, a second substrate, a plurality of photo spacers and a plurality of capacitors are provided. The first substrate has a transparent region and an opaque region. The second substrate is disposed over the first substrate. The photo spacers are disposed between the first substrate and the second substrate and located on the opaque region. The capacitors are disposed between the first substrate and the photo spacers or disposed between the second substrate and the photo spacers. The liquid crystal layer is disposed between the first substrate and the second substrate.