Dynamic Optical Adjustment for Display Light Scattering Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices with light scattering layers suffer from impaired screen quality due to external light scattering when the light-emitting element is in a non-light emission state.
Innovation Solution
Incorporating a TFT substrate with a light-emitting element and an optical adjustment element that changes optical characteristics based on potential differences, along with light scattering bodies in the TFT substrate, light-emitting element, or optical adjustment element, to suppress external light scattering and enhance light usage efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a light scattering layer is added below the light-emitting element, then light extraction efficiency is improved, but screen quality deteriorates due to external light scattering in the non-light emission state
Solution Approach 1:
The patent applies the dynamics principle by making the optical adjustment element's optical characteristics changeable based on potential difference. The element transitions between different optical states (light blocking vs light transmitting) depending on the applied voltage, allowing the system to adapt its light scattering properties dynamically rather than having a fixed light scattering layer
Solution Approach 2:
The patent applies parameter changes by modifying the optical characteristics of the optical adjustment element through changes in potential difference. By controlling the electrical parameter (voltage), the optical parameter (light scattering/transmitting characteristics) is changed, enabling the element to block external light in non-emission states while transmitting light from the light-emitting element in emission states
2Productivity
If a light scattering layer is added below the light-emitting element, then light usage efficiency is improved, but screen quality deteriorates due to glare in the non-light emission state
Solution Approach 1:
The optical adjustment element dynamically changes its optical state based on the light emission state. In non-emission states, it adopts a light blocking state to prevent glare, while in emission states, it transitions to a light transmitting state to allow efficient light extraction, thus adapting to different operational conditions
Solution Approach 2:
By changing the potential difference parameter, the optical adjustment element's light blocking capability is controlled. This parameter change enables the element to switch between blocking external light (reducing glare) and transmitting light (improving light usage efficiency) based on the operational state
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 improves screen quality by blocking external light during non-light emission states and increasing light extraction efficiency during light emission states, reducing glare and enhancing overall display performance.
Implementation Method 1
an optical adjustment element overlapping the light-emitting layer in a plan view and having an optical characteristic that changes in accordance with a potential difference between the second electrode and the third electrode
Implementation Method 2
light scattering bodies included in at least one of the TFT substrate, the light-emitting element, and the optical adjustment element
Data Source
AI summary
A display device includes: a TFT substrate including a thin film transistor; a light-emitting element including a first electrode and a second electrode overlapping each other in a plan view, and a light-emitting layer placed between the first electrode and the second electrode; a third electrode capable of forming an electrical field between the second electrode and the third electrode; an optical adjustment element overlapping the light-emitting layer in a plan view and having an optical characteristic that changes in accordance with a potential difference between the second electrode and the third electrode; and light scattering bodies included in at least one of the TFT substrate, the light-emitting element, and the optical adjustment element.