Display Device Light Direction Control for Brightness
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Solution Overview
Problem
Current electronic display products, such as reflective liquid crystal display devices, suffer from low light utilization rates due to the reduction in light transmittance caused by polarizers and other structural limitations, leading to increased power consumption and inadequate brightness, which hinders their development in transparent display applications.
Innovation Solution
A display device comprising a light guide module, a polarization layer, a light direction control section, and a reflective layer, where the light guide module has defined regions, the polarization layer is positioned to create a first polarization direction, and the light direction control section adjusts the light direction to optimize light passing through the reflective layer, ensuring it has a second polarization direction perpendicular to the first, thereby enhancing light transmittance and allowing for improved brightness and transparent display capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If light passes twice through polarizers in reflective liquid crystal display devices, then the display function is achieved, but light transmittance is reduced and light utilization rate becomes low
Solution Approach 1:
The patent segments the light path into two separate channels: one for display information (passing through polarizers) and one for backlight (passing through non-display regions). This segmentation allows the backlight to bypass the polarizers entirely, eliminating the twice-through loss while maintaining display functionality.
Solution Approach 2:
The patent introduces a spatial dimension solution by using a light guide plate with distinct first regions (display areas) and second regions (non-display areas). Light can pass through the second regions without encountering polarizers, creating a three-dimensional light path optimization that resolves the contradiction between display function and light efficiency.
2Ease of operation
If polarizers are used to control light polarization direction, then display function is achieved, but light transmittance is reduced
Solution Approach 1:
The patent introduces a light direction control section as an intermediary component that uses liquid crystal grating to redirect light paths. This intermediary allows light to be steered toward non-display regions where it can pass through without encountering polarizers, thus maintaining display control while improving transmittance.
Solution Approach 2:
The patent changes the propagation direction parameter of light using the light direction control section. By adjusting the light angle through liquid crystal grating, the system redirects light paths to optimize transmission efficiency while maintaining the necessary polarization control for display function.
3Reliability
If light passes through multiple structural layers including polarizers, then display capability is achieved, but power consumption increases
Solution Approach 1:
The patent segments the light guide plate into display regions and non-display regions, allowing backlight to pass through non-display regions without energy loss to polarizers. This reduces the overall energy required for backlight transmission while maintaining full display capability in the first regions.
Solution Approach 2:
The patent enables continuous useful action of light by allowing backlight to pass through non-display regions without being blocked or absorbed by polarizers. This continuous transmission path maintains display capability while minimizing energy waste, thereby reducing power consumption.
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 increases light transmittance by controlling the light direction and polarization, improving the brightness of displayed images and enabling transparent display by reducing the need for light to pass through polarizers twice, thus enhancing the overall display performance.
Implementation Method 1
the polarizers are configured to make transmitted light have a first polarization direction
Implementation Method 2
the light direction control section is configured to control direction of light to adjust a passing amount of the light reflected by the reflective layer
Implementation Method 3
the reflective layer is located on a side of the light direction control section away from the polarizing layer
Implementation Method 4
the light direction control section is configured to make the light reflected by the reflective layer have a second polarization direction substantially perpendicular to the first polarization direction
Data Source
AI summary
A display device and a display method thereof are disclosed. The display device includes a light guide module and a polarization layer, a light direction control section, a reflective layer sequentially disposed on a side of the light guide module. The light guide module includes a first major surface and a second major surface that are opposite to each other, and the first major surface includes first regions for emitting light and second regions, the polarization layer includes polarizers corresponding to the first regions, and the polarizers have a first polarization direction, and the light direction control section is configured to control light direction to adjust a passing amount of the light reflected by the reflective layer in the non-light exiting regions and make the light have a second polarization direction substantially perpendicular to the first polarization direction after passing through the light direction control section.