Organic Light Emitting Device Region-Specific Wavelength Emission
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Solution Overview
Problem
As display devices increase in size and resolution, the alignment of large metal masks for organic light emitting members becomes difficult, and the Inkjet printing method results in decreased light emitting characteristics compared to deposition methods.
Innovation Solution
The organic light emitting device incorporates a substrate with distinct regions for different color filters and light emitting members, where the first light emitting member has a maximum value in the 500 nm to 800 nm wavelength range and the second in the 400 nm to 500 nm range, with specific sub-members for enhanced light emission, and a common electrode for improved alignment and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of the display device is increased and the resolution is improved, then the display quality is enhanced, but the metal mask becomes bent and difficult to align with the small pixels
Solution Approach 1:
The patent replaces the mechanical mask alignment system with a direct deposition method where the organic light emitting member is deposited without requiring precise mechanical alignment of large metal masks. This substitution eliminates the mechanical alignment problem while maintaining the ability to form patterned light emitting members on high-resolution displays.
2Ease of manufacture
If the Inkjet printing method is used to form the light emitting member, then the manufacturing process is simplified, but the light emitting characteristics are decreased
Solution Approach 1:
The patent changes the physical state parameter of the organic light emitting material from solution state (required for Inkjet printing) to vapor state (used in deposition). This parameter change enables the material to be deposited in a form that maintains high light emitting characteristics while still allowing for simplified manufacturing processes.
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 maintains high light emitting characteristics and display quality while simplifying the manufacturing process by allowing easier alignment of masks and potentially improving light emission efficiency across different wavelengths.
Implementation Method 1
a first light emitting member formed on the first region and the second region, and a second light emitting member disposed on the third region, wherein the first light emitting member has a maximum light emitting value in a wavelength range of about 500 nm to 800 nm
Implementation Method 2
the second light emitting member has a maximum light emitting value in a wavelength range of about 400 nm to 500 nm
Data Source
AI summary
An organic light emitting device according to an exemplary embodiment of the present invention includes: a substrate including a first region, a second region, and a third region; a thin film structure disposed on the substrate; a first color filter, a second color filter, and a third color filter formed on the thin film structure, and respectively corresponding to the first region, the second region, and the third region; a first light emitting member formed on the first region and the second region; and a second light emitting member disposed on the third region, wherein the first light emitting member has a maximum light emitting value in a wavelength range of about 500 nm to 800 nm, and the second light emitting member has a maximum light emitting value in a wavelength range of about 400 nm to 500 nm.