Flat Display Panel CIL and Sensor Hole Appearance Uniformity
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Solution Overview
Problem
In liquid crystal display panels, the camera index light source (CIL) hole and ambient light sensor hole appear differently when camera light is turned off under normal luminance conditions due to variations in their sectional structures, causing an uneven viewed appearance at side viewing angles.
Innovation Solution
The CIL hole and ambient light sensor hole are configured with the same sectional structure by not forming or only forming a planarization film at these areas, eliminating the presence of a gate insulating layer, first passivation film, and second passivation film, which creates a uniform appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gate insulating layer, first passivation film, second passivation film are formed at CIL hole and ambient light sensor hole, then manufacturing process is complete, but appearance becomes uneven at side viewing angles
Solution Approach 1:
The patent applies local quality by differentiating the treatment of CIL hole/ambient light sensor hole regions from pixel regions. Specifically, the gate insulating layer, first passivation film, and second passivation film are selectively omitted only at the CIL hole and ambient light sensor hole positions, while maintaining these layers in pixel regions. This localized structural modification achieves uniform appearance at side viewing angles without compromising the functionality of pixel regions.
2Shape
If planarization film is formed at CIL hole and ambient light sensor hole, then surface flatness is improved, but appearance difference remains at side viewing angles
Solution Approach 1:
The patent applies local quality by selectively removing the planarization film at the CIL hole and ambient light sensor hole positions, while maintaining it in pixel regions. This creates a local structural difference that allows light to pass through uniformly from the liquid crystal layer, achieving consistent appearance at side viewing angles while preserving surface flatness in functional pixel areas.
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 ensures that the CIL hole and ambient light sensor hole appear the same when camera light is off, enhancing the display panel's quality by preventing differences in appearance at side viewing angles.
Implementation Method 1
The liquid crystals have optical anisotropy, in which the molecular structure of the liquid crystals is elongated and the liquid crystals are arranged while having directivity
Implementation Method 2
polarization characteristics, in which the direction in which liquid crystal molecules are arranged changes depending on the size of the liquid crystals when the liquid crystals are placed in an electric field
Implementation Method 3
A voltage is applied to an electric field generation electrode to generate an electric field in the liquid crystal layer, whereby the direction in which liquid crystal molecules in the liquid crystal layer are arranged is set
Data Source
AI summary
Disclosed are a flat display panel that is capable of preventing a different appearance between a camera index light source (CIL) and an ambient light sensor hole and a method of manufacturing the same. The flat display panel is configured such that, on a first substrate, partitioned into a pixel region of a display area and a CIL hole part and an ambient light sensor hole part of a non-display area, a gate insulating layer, a first passivation film, a planarization film, and a second passivation film are not present at the CIL hole part or at the ambient light sensor hole part or such that only the planarization film is present at the CIL hole part and the ambient light sensor hole part.