Light Path Modulation Box for LCD Brightness Crosstalk
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Solution Overview
Problem
Conventional liquid crystal display devices experience a brightness crosstalk phenomenon due to non-perpendicular light incidence from the backlight module, affecting display performance.
Innovation Solution
A liquid crystal display device incorporating a light path modulation box with a liquid crystal layer, dielectric layer, and polarizers to modulate backlight emission, ensuring it enters the panel perpendicularly, thereby reducing crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional backlight module is used to provide illumination for the liquid crystal display panel, then the display device can achieve basic display capability, but brightness crosstalk phenomenon occurs due to non-perpendicular light incidence
Solution Approach 1:
A light path modulation box is introduced as an intermediary component between the backlight source and the liquid crystal display panel. This box contains a liquid crystal layer that acts as a mediator to refract and redirect oblique backlight rays, converting them into perpendicular incidence on the panel to eliminate brightness crosstalk while preserving illumination functionality
Solution Approach 2:
The refractive index of the liquid crystal layer is specifically selected and adjusted to match the abnormal refractive index of the liquid crystal display panel. By changing this optical parameter, the light path modulation box achieves precise control over light direction, transforming oblique incidence into perpendicular incidence to resolve the crosstalk issue
2Reliability
If the liquid crystal layer thickness is increased to improve light modulation capability, then light control performance improves, but the overall device thickness increases
Solution Approach 1:
Instead of increasing thickness, the invention optimizes the liquid crystal layer thickness by matching it with the dielectric layer thickness and adjusting the refractive index parameters. This parameter optimization achieves effective light modulation while maintaining a compact overall structure
Solution Approach 2:
The light path modulation box employs a composite structure combining the liquid crystal layer with a dielectric layer having a higher refractive index. This composite material approach enhances light modulation capability through synergistic optical effects without requiring increased thickness
3Object-affected harmful factors
If a light path modulation box with liquid crystal layer and dielectric layer is introduced to correct light incidence angle, then brightness crosstalk is reduced, but device complexity increases
Solution Approach 1:
The light path modulation box is designed to perform multiple functions within a single integrated structure: it serves as both a liquid crystal display panel and a light path modulation device. The same liquid crystal layer and electrode structure achieve both display functionality and light direction correction, eliminating the need for separate components
Solution Approach 2:
The invention merges the light path modulation function with the display function by integrating the liquid crystal layer, dielectric layer, and electrode structures into a unified device. This combination reduces structural complexity compared to having separate modulation and display components
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 effectively minimizes brightness crosstalk by aligning obliquely emitted light perpendicular to the panel, enhancing display quality.
Implementation Method 1
a refractive index of the dielectric layer is greater than a normal refractive index of the liquid crystal molecules, and the refractive index of the dielectric layer is equal to an abnormal refractive index of the liquid crystal molecules
Implementation Method 2
two polarizers are disposed respectively on a surface of the light path modulation box near the liquid crystal display panel and a surface of the light path modulation box near the backlight source
Implementation Method 3
The liquid crystal layer comprises a plurality of liquid crystal molecules, and the liquid crystal molecules are arranged in an array
Data Source
AI summary
A liquid crystal display device provided by the present invention includes a backlight source, a light path modulation box and a liquid crystal display panel. The light path modulation box is disposed on the backlight source. The light path modulation box is configured to modulate light emitted out from the backlight source such that backlight is emitted out along a direction perpendicular to the light path modulation box. The liquid crystal display panel is disposed on the light path modulation box. The backlight emitted by the backlight source passes through the light path modulation box and enters the liquid crystal display panel.