Operating Device Light Guide Member for Position Detection
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Solution Overview
Problem
Existing operating devices for information processing apparatuses face challenges in accurately detecting their position due to interference from room lighting, and achieving even light emission is difficult with a limited number of light sources.
Innovation Solution
The operating device features a central section with a light emitting surface at its front, a light source positioned rearward, and a light guide member with inclined side surfaces to ensure balanced light distribution and reduce interference from external lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a light emitting section is provided to enable position detection by an information processing apparatus, then the position detection function is achieved, but room lighting reflection interferes with the accuracy of position detection
Solution Approach 1:
A light guide member is introduced as an intermediary component between the light source and the external environment. This light guide member conducts light from the light source to the light emitting surface while controlling the light path, thereby mediating between the internal light source and external detection, and reducing the impact of room lighting reflection on detection accuracy
Solution Approach 2:
The light guide member has inclined side surfaces with different orientations. The first side surface is inclined at a first angle while the second side surface is inclined at a second angle different from the first. This creates local quality differences in light emission direction and intensity across different regions of the light guide member, optimizing light distribution and reducing reflection interference from various directions
2Device complexity
If the number of light sources is reduced to simplify the structure, then device complexity is decreased, but it becomes difficult to achieve even light emission across the light emitting surface
Solution Approach 1:
The light guide member serves as an intermediary that redistributes light from a limited number of light sources. Through its inclined side surfaces, it spreads and evens out the light distribution across the light emitting surface, achieving uniform illumination without requiring multiple light sources
Solution Approach 2:
The light guide member transforms the light distribution from a point-source or limited-source configuration into a surface-level uniform emission. By using inclined surfaces at different angles, it distributes light across multiple spatial dimensions, achieving even illumination across the entire light emitting surface
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 enhances the accuracy of position detection by minimizing external light interference and maintaining even brightness across the light emitting surface, improving user experience and device interaction.
Implementation Method 1
a light guide member extending from the light source toward a back surface of the light emitting panel
Implementation Method 2
The light guide member has left and right side surfaces so inclined that the width of the light guide member in a left-right direction gradually increases along a forward direction
Data Source
AI summary
In order to reduce influences of light from indoor lighting equipment or the like on the accuracy in detecting the position of an operating device, an operating device (301) includes: left and right hold sections to be held by a user, each of which is provided with an operating member at an upper surface thereof; a central section (321) which is a section between the left and right hold sections; and a light emitting surface (328c) adapted to emit light to be captured by an information processing apparatus through a camera, the light emitting surface (328c) provided at a front surface of the central section (321). The central section (321) includes a portion which is located over the light emitting surface (328c) and is located on a more forward side than the light emitting surface (328c).