Display Device Light Guide Plate Pattern Switching Control
Solution Overview
Problem
Existing display devices require complex control systems to switch display patterns, leading to increased load on high-order control devices when the turn-on order of light sources changes.
Innovation Solution
A display device with a light guide plate, storage for a reference table correlating turn-on state numbers with light source combinations, and a controller to simplify pattern switching by specifying and controlling light source combinations based on received turn-on control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a high-order control device generates turn-on order information according to the turn-on order of individual light sources, then the display device can dynamically switch display patterns, but the load on the high-order control device increases
Solution Approach 1:
The control system is segmented into two parts: a simplified controller in the display device that directly controls light sources based on simple turn-on state numbers, and a reference table that pre-defines light source combinations. This segmentation removes the need for complex control logic from the high-order control device, reducing its load while maintaining dynamic pattern switching capability.
Solution Approach 2:
Light source combinations are pre-defined and stored in a reference table before operation. When pattern switching is needed, the system simply retrieves a pre-prepared combination corresponding to a turn-on state number, rather than generating control information in real-time. This preliminary preparation of control data significantly reduces the computational load on the control device during operation.
2Adaptability or versatility
If the turn-on order of light sources is changed to switch display patterns, then different patterns can be displayed, but the control process becomes more complex
Solution Approach 1:
Instead of directly managing complex light source combinations, the system uses a reference table that copies and pre-organizes all possible light source configurations. The controller simply references this pre-copied data structure using a simple turn-on state number, making operation straightforward while still enabling access to multiple pattern variations.
3Manufacturing precision
If multiple light sources are controlled individually for pattern switching, then precise pattern control is achieved, but the control signal processing becomes more complex
Solution Approach 1:
All complex control signal combinations are pre-calculated and stored in the reference table before operation. The controller only needs to retrieve the appropriate pre-prepared control signals by indexing with a simple turn-on state number, maintaining precise control over multiple light sources while avoiding complex real-time signal processing.
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
The solution simplifies the control for switching display patterns, reducing the load on control circuits and enabling efficient dynamic pattern switching.
Implementation Method 1
a light guide plate made of a transparent material, capable of displaying a plurality of patterns, and including an incident surface
Implementation Method 2
a plurality of prisms arrayed on one of surfaces of the light guide plate along the plurality of patterns, the plurality of prisms reflecting light toward the other surface of the light guide plate
Data Source
AI summary
A display device includes a light guide plate 2 capable of displaying a plurality of patterns (21-1 to 21-9) and including an incident surface; a plurality of light sources (3-1 to 3-9) disposed opposite to the incident surface and corresponding to the plurality of patterns; a storage 5 configured to store a reference table that represents a relationship between a turn-on state number and a combination of light sources to be turned on among the plurality of light sources for each of a plurality of the turn-on state numbers; and a controller 7 configured to specify the combination of light sources to be turned on by referring to the reference table, the combination corresponding to the turn-on state number included in turn-on control information, and control turn-on and turn-off of each light source according to the combination of the light sources. The light guide plate 2 includes a plurality of prisms arrayed on one of surfaces of the light guide plate along the plurality of patterns, the plurality of prisms reflecting light toward the other surface of the light guide plate, the light being emitted from a light source corresponding to the pattern and being incident on the light guide plate from the incident surface.