Light Guide Plate Random Pixel Tone Control
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Solution Overview
Problem
Conventional display devices using light guide plates struggle to naturally express stereoscopic effects and continuous tone changes, with existing techniques being ineffective or limited in their application range.
Innovation Solution
A display device featuring a light guide plate with pixel regions that include light exit structures capable of changing the direction of incident light, where the amount of light emitted from each pixel region is randomly set to a first or second light amount value, allowing for more natural image expression by dividing the tone range into partial ranges and adjusting light amounts accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional light guide plate techniques are used to display images with tone changes, then the manufacturing process is simple, but the stereoscopic effect and natural image expression are insufficient
Solution Approach 1:
The light guide plate is divided into multiple pixel regions, each containing light exit structures with specific patterns. By segmenting the plate into discrete controllable units, the patent achieves precise tone expression through random light amount variation in each pixel region, thereby improving stereoscopic effect and natural image expression.
Solution Approach 2:
Different pixel regions are assigned different light exit structures with varying patterns and light amounts. Each local region has optimized properties for its specific tone requirement, allowing continuous tone changes and natural image expression while maintaining manufacturing feasibility through localized structure variation.
2Manufacturing precision
If the amount of light emitted from each pixel region is randomly set to first or second light amount values, then continuous gradation and natural image expression are achieved, but the manufacturing precision requirement increases
Solution Approach 1:
Instead of attempting to precisely control continuous light amounts which would be difficult to manufacture, the patent uses discrete light amount levels (first and second light amount values) with random selection. This partial action approach achieves perceived continuous gradation through statistical averaging while remaining manufacturable with standard precision.
Solution Approach 2:
The patent changes the light amount parameter by randomly selecting between discrete values (first or second light amount) for each pixel region. This parameter variation strategy achieves continuous tone perception through randomization while avoiding the manufacturing complexity of continuous precision control.
3Manufacturing precision
If light exit structures are provided in each pixel region to control light direction, then image quality and tone expression are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The light exit structures serve multiple functions: they control light direction, define pixel region boundaries, and enable tone expression through their patterns. By making the structures multi-functional, the patent improves image quality without proportionally increasing device complexity, as the same structural elements accomplish multiple objectives.
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 approach enables more natural image expression by blurring tone boundaries and achieving continuous gradation, even with limited manufacturing accuracy, resulting in a more effective and natural display of images with varying tones.
Implementation Method 1
a light guide plate configured to guide light incident from the light source and emits a part of the light from a light exit surface
Implementation Method 2
light exit structures configured to change a direction of the incident light and emit the incident light from the light exit surface
Data Source
AI summary
To achieve more natural image expression. A display device (1) is provided with a light guide plate (4) which displays a predetermined image having a tone caused by changing the amount of light emitted from each of pixel regions including one or more light exit structures (43), and the amount of light emitted from the pixel regions displaying the tone in a predetermined range is randomly set so as to be a first light amount value or a second light amount value greater than the first light amount value.