Grounded Shielding Layer for LCD White Line Elimination
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Solution Overview
Problem
Existing LCD panels with horizontal electric field configurations suffer from white lines due to induced charges during activation, which are not effectively addressed by current methods such as delaying backlight turn-on or increasing the periphery region width, as these solutions either prolong activation time or increase panel size and cost.
Innovation Solution
Incorporating a grounded and electrically conductive shielding layer in the periphery region to rapidly discharge induced charges, which are generated by the voltage change of gate leads, thereby preventing their dispersion into the display region and eliminating white lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the backlight source is delayed in turning on to avoid white lines, then display quality is improved, but activation time is prolonged
Solution Approach 1:
The patent converts the harmful induced electromagnetic field into a beneficial effect by using it to generate positive charges on the shielding layer, which then attract and neutralize the harmful negative induced charges at the display region edges, eliminating white lines without delaying activation
Solution Approach 2:
The shielding layer acts as an intermediary component between the gate leads and the display region, intercepting induced charges and preventing them from affecting the liquid crystal molecules, thus solving the white line problem without time delay
2Reliability
If the periphery region width is increased to prevent induced charges from dispersing into the display region, then display quality is improved, but panel size and manufacturing cost increase
Solution Approach 1:
The patent extracts the charge neutralization function from the periphery region structure and assigns it to the shielding layer, allowing the periphery region to maintain its original size while still preventing induced charges from affecting the display region
Solution Approach 2:
The shielding layer serves as an intermediary that actively neutralizes induced charges within the existing periphery region boundaries, eliminating the need to expand the periphery region width
3Reliability
If the distance between gate leads and display region is increased to reduce induced electromagnetic field intensity, then display quality is improved, but panel size increases
Solution Approach 1:
The patent converts the harmful induced electromagnetic field into a beneficial charging mechanism for the shielding layer, which then actively neutralizes induced charges, allowing gate leads to be positioned closer to the display region without compromising display quality
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 shielding layer effectively shields the induced electromagnetic field, preventing white lines without prolonging activation time or increasing panel size, thus enhancing display quality and reducing manufacturing costs.
Implementation Method 1
at least one shielding layer located in the periphery region, so as to shield an induced electromagnetic field caused by a voltage change of the gate leads
Implementation Method 2
which is grounded and electrically conductive... rapidly discharge induced charges
Data Source
AI summary
The present invention provides a liquid crystal display (LCD) panel and a LCD apparatus. The LCD panel has a display region and a periphery region and comprises an array substrate and a color filter substrate opposite to each other, the array substrate has a plurality of pixel regions defined by intersecting signal lines in the display region, each pixel region comprises a thin film transistor, and signal leads are connected to the signal lines and disposed in the periphery region. Wherein, the LCD panel further comprises at least one shielding layer located in the periphery region, which is grounded and electrically conductive. The LCD apparatus comprises the LCD panel.