OLED Display Light Transmittance Control via Solvent Dynamics
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Solution Overview
Problem
Current OLED displays lack effective control over external light transmittance, which affects their transparency and image clarity when external light is present, especially when not emitting images.
Innovation Solution
The OLED display design includes a structure with separate light-emitting and light-transmitting regions, featuring independently formed electrodes, an organic emission layer, and a solvent that adjusts light blocking based on an electric field, allowing for controlled light transmittance by varying the solvent's contact area with electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the OLED display uses a transmission region to allow external light to pass through, then transparency is improved, but image clarity deteriorates when external light is present
Solution Approach 1:
The patent applies the dynamics principle by making the light blocking capability of the transmission region dynamically controllable. The solvent's light blocking area is adjusted according to an electric field, allowing the display to switch between transparent and opaque states. This dynamic adjustment resolves the contradiction by enabling the transmission region to adapt its light transmittance based on operational requirements, thereby maintaining image clarity when needed while preserving transparency when not in use.
2Object-affected harmful factors
If the OLED display blocks external light to improve image clarity, then image clarity is improved, but transparency deteriorates
Solution Approach 1:
The patent implements dynamic control of light blocking in the transmission region through electric field adjustment of the solvent. This allows the display to switch between transparent and opaque states as needed, resolving the contradiction by making transparency conditional rather than fixed. The transmission region can be made opaque only when image clarity is required, otherwise it remains transparent.
3Object-affected harmful factors
If the solvent blocks light to improve image clarity, then image clarity is improved, but light transmittance control capability deteriorates
Solution Approach 1:
The patent applies the feedback principle by using an electric field to control the solvent's light blocking area. The electric field acts as a feedback mechanism that adjusts the solvent's position and light blocking capability based on operational requirements. This enhances adaptability by allowing precise control over light transmittance, enabling the display to optimize image clarity while maintaining versatile control over the transmission region's optical properties.
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 design enables the OLED display to effectively block external light when emitting images and allow transparency when not in use, enhancing image clarity and user experience by dynamically managing light transmittance.
Implementation Method 1
a solvent that is placed on the third electrode, blocks light, and adjusts a light blocking area according to an electric field
Data Source
AI summary
An organic light-emitting diode (OLED) display capable of controlling light transmittance is disclosed. In one aspect, the OLED display includes a plurality of pixels, each including a first region configured to emit light and a second region configured to transmit light therethrough and a plurality of first electrodes respectively formed in the first regions of the pixels. The OLED display also includes a plurality of organic layers respectively formed over the first electrodes, a second electrode formed over all of the organic layers, and a plurality of third electrodes each formed in the second regions of the pixels. The OLED display further includes a plurality of solvents respectively placed over the third electrodes, wherein each of the solvents is configured to selectively block light and a fourth electrode formed over the solvents for all of the pixels.