FIPEL Backlight Panel Dual-Surface Emission
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Solution Overview
Problem
Display devices, such as televisions, often suffer from high contrast between the screen and the environment behind the device, leading to viewer fatigue due to the inability to easily manage the brightness of the content and the darkness of the backdrop, and existing solutions require additional circuitry for built-in light sources.
Innovation Solution
The use of a Field-Induced Polymer Electro-Luminescent (FIPEL) device as a backlight for both the light modulator and the area behind the display, emitting light from both surfaces, with a diffuser or color filter to soften the contrast, and a processor to control the operation based on video information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a built-in light source is added behind the display screen to reduce contrast, then the contrast between display and backdrop is improved, but the device complexity increases due to additional circuitry
Solution Approach 1:
The FIPEL backlight panel performs multiple functions: it provides backlight for the LCD light modulator and simultaneously emits light from its back surface to illuminate the backdrop area. This dual functionality eliminates the need for separate circuitry dedicated solely to backdrop lighting, as the same FIPEL device serves both purposes.
Solution Approach 2:
The FIPEL backlight panel serves itself by using its inherent light-emitting capability to provide both front illumination for the display and back illumination for the backdrop. The device's own light output is utilized to solve the contrast problem without requiring external or additional lighting systems.
2Object-affected harmful factors
If a diffuser is added to soften the backfilled light, then the contrast softening is improved, but the device complexity increases
Solution Approach 1:
The diffuser is applied selectively to the back surface of the FIPEL panel, affecting only the light emitted in the backward direction. This localized treatment softens the backdrop illumination without interfering with the front surface display quality, and the diffuser can be a simple frosted sheet rather than a complex optical system.
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 solution reduces viewer fatigue by providing balanced lighting that softens the contrast between the display screen and the backdrop, enhancing the viewing experience without the need for additional circuitry, and allows for color-balanced white light emission in two directions.
Implementation Method 1
The present invention uses a light emitting device referred to as Field-Induced Polymer Electro-Luminescent device
Implementation Method 2
a diffusor attached or bonded to the back surface of the FIPEL panel... The diffusor may be a frosted sheet more commonly found in front of typical LED backlight assemblies or it may consist of microstructures designed to steer or defuse light
Data Source
AI summary
A television formed of a FIPEL panel that creates light in both front and rear directions. The television system has a light modulator and a backlight layer for the light modulator. The backlight layer emits light both toward the light modulator to create a television display, and away from the light modulator to create a backlight for the television. The television can be in a housing, with a transparent back. The housing can also have a bezel that can be lit by the backlight layer.