Display Panel Optics for Higher Frontal Brightness in Thin Panels
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Solution Overview
Problem
Existing display panels face challenges in achieving high frontal brightness while maintaining low power consumption and reducing thickness.
Innovation Solution
A display panel design incorporating a light-converging layer with light-transmitting holes and a light-filtering layer with parts having different refractive indices, which reduces light divergence and enhances frontal brightness without increasing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the display panel is increased to meet high brightness requirements, then the frontal brightness is improved, but the power consumption increases
Solution Approach 1:
The patent segments the light management function into two distinct layers: a light-converging layer that collects and directs light, and a light-filtering layer that selectively filters wavelengths. This segmentation allows each layer to optimize light efficiency independently, improving frontal brightness without requiring increased power consumption from the light-emitting devices.
Solution Approach 2:
The patent changes the optical parameters of the light-filtering layer by selecting materials with specific refractive indices and absorption characteristics. The light-filtering layer uses materials whose refractive index is higher than the light-converging layer, creating total internal reflection at interfaces to redirect light toward the frontal viewing angle, thereby enhancing brightness without additional power consumption.
2Length of stationary object
If conventional light management structures are used, then the display panel maintains simple structure, but the thickness cannot be reduced
Solution Approach 1:
The patent merges multiple functions into the light-filtering layer: it serves as both a wavelength-selective filter and a light-redirection element through its refractive index properties. Additionally, the light-converging layer combines light collection and directional control functions. This merging reduces the need for separate thick structural layers, enabling thickness reduction while maintaining functional complexity.
Solution Approach 2:
The patent employs composite material structures where the light-converging layer and light-filtering layer are made of different materials with complementary optical properties. The light-filtering layer uses materials with higher refractive indices than the light-converging layer, creating a composite structure that achieves both thinness and complex light management functionality through material property optimization rather than structural bulk.
3Object-affected harmful factors
If conventional light management structures are used, then the display panel maintains simple structure, but ambient light reflection is not reduced
Solution Approach 1:
The patent converts the harmful effect of ambient light reflection into a beneficial function. The light-filtering layer, designed with specific refractive indices, creates total internal reflection at its interfaces with the light-converging layer. This mechanism redirects both emitted light and reflected ambient light toward the frontal viewing angle, transforming unwanted reflections into enhanced display visibility without adding complex anti-reflection coatings or additional layers.
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 design improves frontal brightness by reducing light divergence through total reflection at the interface of the light-filtering parts, while also reducing thickness and ambient light reflection.
Implementation Method 1
the light-filtering part has a greater refractive index than the light-converging layer; some light with large divergence angles can undergo total reflection at the interface where the light-filtering part contacts the side wall of the light-transmitting hole
Implementation Method 2
a light-converging layer, arranged at a side of the display substrate, and provided with a plurality of light-transmitting holes
Implementation Method 3
a light-filtering layer, covering the light-converging layer, and including a plurality of light-filtering parts, where at least some of the light-filtering parts have different colors
Data Source
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AI summary
The present disclosure relates to the technical field of display and relates to a display panel and a display apparatus. The display panel comprises a display substrate (PNL), a light condensing layer (LL) and a light filter layer (CL), the display substrate being provided with a plurality of light emitting devices (LD) distributed in an array. The light condensing layer (LL) is arranged on one side of the display substrate and is provided with a plurality of light transmission holes (LH), each light transmission hole (LH) overlapping one light emitting device (LD), and the light condensing layer (LL) being made of a light transmitting material. The light filter layer (CL) covers the light condensing layer and comprises a plurality of light filtering parts (CF), at least some of the light filtering parts (CF) having different colors. Each light filtering part (CF) fills one light transmission hole (LH), the refractive index of the light filtering parts (CF) being greater than the refractive index of the light condensing layer (LL). The light transmission holes (LH) expand in the direction away from the display substrate (PNL). Front brightness can be increased without an increase in power consumption, and thickness can be reduced.