Electronic Viewfinder Housing Light Shielding Design
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Solution Overview
Problem
The display quality of electronic viewfinders is degraded due to reflection of display light by the inner edge of the overlap portion, leading to visual recognition of the inner edge and contrast degradation.
Innovation Solution
An electronic viewfinder design featuring a housing with an overlap portion and a light shielding portion, where the distance between the peripheral portion and the light shielding portion is greater than the distance between the peripheral portion and the overlap portion, ensuring that light beams within a certain angle from the normal do not enter the overlap portion but are instead directed to the light shielding portion, thereby preventing reflection and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the overlap portion is positioned close to the display portion to suppress external light reflection, then light shielding performance is improved, but display light is reflected by the inner edge of the overlap portion causing visual recognition and display quality degradation
Solution Approach 1:
A light shielding portion is introduced as an intermediary element positioned between the display portion and the overlap portion. This light shielding portion intercepts display light at controlled angles, preventing it from reaching the inner edge of the overlap portion where it would cause unwanted reflection. The light shielding portion acts as a mediator that manages light paths without requiring the overlap portion to be positioned far from the display portion.
Solution Approach 2:
The light shielding portion is strategically positioned to affect only specific light paths - specifically those emitted at angles not less than a predetermined angle from the normal. This localized light management allows the overlap portion to maintain its light shielding function for external light while preventing self-reflection of display light. The solution applies different light control strategies to different angular regions.
2Object-generated harmful factors
If the overlap portion is positioned far from the display portion to avoid visual recognition of reflections, then display quality is improved, but external light reflection suppression capability is reduced
Solution Approach 1:
The light shielding portion serves as an intermediary that enables the overlap portion to be positioned optimally for both functions. By placing the light shielding portion between the display and overlap portions, the system achieves external light suppression without requiring the overlap portion to be distant from the display portion, thus maintaining both light shielding effectiveness and display quality.
Solution Approach 2:
The solution transitions from a one-dimensional positioning problem (distance between overlap and display portions) to a two-dimensional spatial arrangement by introducing the light shielding portion at a different position. This allows independent optimization of both the overlap portion position for external light suppression and the light shielding portion position for preventing inner edge reflection visibility.
3Object-generated harmful factors
If a light shielding portion is added to prevent display light reflection, then display quality is improved, but device complexity increases
Solution Approach 1:
The light shielding portion is merged with the housing structure, integrating the light control function into the existing housing rather than adding a separate component. This integration approach minimizes additional complexity while achieving the desired light management. The light shielding portion can be formed as part of the housing or as a closely integrated component.
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 effectively suppresses the visual recognition of reflections, enhancing display quality by ensuring that light beams are properly directed away from the observer, thus preventing display quality degradation caused by external light reflection.
Implementation Method 1
a light beam, of the light beams emitted from the end of the display portion, which has an angle not less than the predetermined angle from the normal of the first surface and is reflected by the overlap portion enters the light shielding portion
Data Source
AI summary
A viewfinder comprising a display device which comprises a surface including a display portion and a peripheral portion, a lens and a housing is provided. In an orthogonal projection with respect to the surface, the housing comprises an overlap portion and a shielding portion that overlap at least a part of the peripheral portion, respectively. A distance between the peripheral portion and the shielding portion is larger than a distance between the peripheral portion and the overlap portion. A light beam emitted from an end of the display portion which has an angle less than a predetermined angle from a normal of the surface enters the lens, and a light beam emitted from the end which has an angle not less than the predetermined angle from the normal of the surface and is reflected by the overlap portion enters the shielding portion.