Display Panel Light Adjustment Layers for Uniform TFT Response
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Solution Overview
Problem
Existing display panels face issues with display uniformity due to different light intensities affecting thin-film transistors in photosensitive and normal display regions, leading to phenomena like white or black masses, which are caused by varying light intensities impacting the characteristics of thin-film transistors.
Innovation Solution
Incorporating a first light adjustment layer with a higher refractive index and a second light adjustment layer with a lower refractive index on the substrate, positioned such that the first layer faces away from the substrate, to increase reflectance at their interface and reduce light intensity reaching thin-film transistors, while maintaining sufficient light transmittance for optical functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the light transmittance of the photosensitive region is increased to implement optical functions, then the optical function performance is improved, but the light intensity reaching thin-film transistors becomes uneven causing display uniformity deterioration
Solution Approach 1:
The patent applies local quality by differentiating the treatment of light adjustment layers between the photosensitive region and normal display regions. The photosensitive region includes a first light adjustment layer with specific light transmittance to ensure optical function performance, while normal display regions include second light adjustment layers with different structural configurations. This localized differentiation allows each region to have optimized light properties suitable for its specific function, resolving the contradiction between optical performance and display uniformity.
Solution Approach 2:
The patent segments the light adjustment mechanism into multiple distinct layers: a first light adjustment layer in the photosensitive region and second light adjustment layers in normal display regions. Each segment has independently optimized properties - the first layer uses a single-layer structure with high transmittance for optical functions, while the second layers use multi-layer structures with lower transmittance for display uniformity. This segmentation allows simultaneous optimization of both optical function performance and display uniformity without compromise.
2Adaptability or versatility
If the subpixel density of the photosensitive region is adjusted to increase light transmittance, then optical functions are enabled, but the light intensity difference between regions causes thin-film transistor characteristic drift
Solution Approach 1:
The patent introduces light adjustment layers as intermediary structures between the display panel and the thin-film transistors. These intermediary layers actively manage and regulate the light intensity reaching the transistors - allowing high transmittance in the photosensitive region for optical functions while simultaneously blocking excessive light in normal display regions. This intermediary mechanism protects thin-film transistors from harmful light exposure that would cause characteristic drift, while still enabling optical function capability.
3Device complexity
If a single-layer light adjustment structure is used, then the device complexity is reduced, but the light intensity control precision is insufficient to achieve both optical functions and display uniformity
Solution Approach 1:
The patent segments the light adjustment function into multiple distinct layers with different properties and positions. The first light adjustment layer in the photosensitive region and the second light adjustment layers in normal display regions are structurally differentiated. This segmentation enables precise control of light intensity in different regions - the single-layer first structure allows high transmittance for optical functions, while the multi-layer second structures provide fine-tuned light blocking for display uniformity, achieving high light intensity control precision without excessive overall complexity.
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 reduces the intensity of light reaching thin-film transistors, minimizing the drift in their characteristics and improving display uniformity, allowing for both effective optical functions and display performance.
Implementation Method 1
The refractive index of the first light adjustment layer is greater than the refractive index of the second light adjustment layer
Implementation Method 2
the reflectance of the light at the interface between the first light adjustment layer and the second light adjustment layer can be appropriately increased
Data Source
AI summary
Provided are a display panel and a display apparatus. The display panel includes a first display region and a second display region. The light transmittance of the first display region is greater than the light transmittance of the second display region. The display panel also includes a substrate and at least one light adjustment layer disposed on one side of the substrate. Each light adjustment layer includes a first light adjustment layer and a second light adjustment layer. The first light adjustment layer is disposed on the side of the second light adjustment layer facing away from the substrate. The refractive index of the first light adjustment layer is greater than the refractive index of the second light adjustment layer.