Display Device Light Guide Plate External Light Utilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices, such as OLEDs, face increased current consumption and reduced battery life when adjusting luminance in high external illuminance environments, as they increase driving current to enhance visibility.
Innovation Solution
A display device design incorporating a light condensing element, a light guide plate, and a reflective plate that utilizes external light to increase luminance without boosting current consumption, featuring a color conversion layer and a liquid crystal display panel to manage light transmittance and emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the driving current of the display panel is increased to improve visibility in high external illuminance environments, then the display luminance is improved, but the current consumption increases and battery use time is reduced
Solution Approach 1:
The patent introduces a light guide plate as an intermediary component that captures external light from the environment and guides it to the display panel. This mediator allows the display to utilize ambient light resources rather than relying solely on internally generated light from high current consumption, thereby improving display luminance while maintaining lower current consumption levels.
Solution Approach 2:
The display device utilizes external light from the environment to supplement its own illumination needs. The light guide plate and reflective plate work together to capture, guide, and reflect external light back through the display panel, enabling the system to serve itself by using ambient light resources rather than exclusively relying on power-consuming internal light sources.
2Illumination intensity
If the driving current of the display panel is increased to improve visibility in high external illuminance environments, then the display luminance is improved, but the battery use time is reduced
Solution Approach 1:
The light guide plate acts as an intermediary that captures external light and guides it to the display panel, enabling the display to utilize ambient light resources. This reduces reliance on power-consuming internal light sources, thereby extending battery use time while maintaining display luminance in high external illuminance environments.
Solution Approach 2:
The display device utilizes external light from the environment to supplement its illumination needs through the light guide plate and reflective plate system. This self-service approach using ambient light resources reduces power consumption and extends battery operation duration.
3Illumination intensity
If a light guide plate and reflective plate structure is added to utilize external light, then the display luminance is improved without increasing current consumption, but the device complexity increases
Solution Approach 1:
The light guide plate serves multiple functions: it guides external light to the display panel, reflects light internally to enhance luminance, and potentially serves as a structural component of the display device. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving improved display luminance through external light utilization.
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 enhances display luminance using external light, improving visibility without increasing current consumption, thus extending battery life and optimizing energy usage.
Implementation Method 1
the light condensing element transmits external light to the light guide plate
Implementation Method 2
The protrusion part may receive the external light transmitted from the light condensing element, and reflect the external light toward the light guide plate
Implementation Method 3
The light transmittance of the second display panel may be changed corresponding to an electric field formed between the data line and the reflective plate
Data Source
AI summary
A display device includes a first display panel including a light emitting element; a light condensing element at a side portion of the first display panel; a light guide plate below the first display panel; The light condensing element transmits external light to the light guide plate.