Vehicle Meter Display with Decorative Light-Discharging Color Filter
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Solution Overview
Problem
Conventional display devices for vehicle meters face challenges in achieving decorative illumination while maintaining display functionality, often resulting in increased complexity, component count, and limited design flexibility due to reliance on liquid crystal screens, light guides, and dedicated reflection components.
Innovation Solution
A display device incorporating a light-emitting unit with a color filter at the front, featuring a light-discharging surface and a reflecting surface to provide independent decorative illumination, reducing the need for additional components and simplifying the configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a long light guide lens is used to perform decorative illumination away from the liquid crystal screen, then decorative illumination is achieved, but it is difficult to incorporate the light guide lens in the limited space in the display device
Solution Approach 1:
Instead of using a long light guide lens to extend illumination away from the screen, the patent inverts the approach by placing a dedicated light source directly at the panel switch location. This eliminates the need for a long light guide lens while achieving the same decorative illumination effect, thereby resolving the space constraint issue.
2Illumination intensity
If the whole of the panel switches is illuminated by light from the liquid crystal panel, then the switches are illuminated, but an area for ensuring switch light is required in the liquid crystal screen, resulting in an increase in the whole of the liquid crystal display device in size
Solution Approach 1:
The patent extracts the illumination function for panel switches from the liquid crystal display screen system. By providing a dedicated light source for the switches, the patent eliminates the need to reserve area in the liquid crystal screen for switch illumination, thereby reducing the overall display device size while maintaining switch illumination.
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 allows for a high decorative effect with a simple configuration, independent of display illumination, and reduces the overall size and component count, while ensuring clear visibility of the vehicle driving state.
Implementation Method 1
a light guide lens is arranged between the liquid crystal panel and the panel switches. Light from the liquid crystal panel is guided to the panel switches via the light guide lens to illuminate the panel switches
Implementation Method 2
A corner portion between a front wall portion and a side wall portion of the transparent case has a reflection portion for reflecting external light (light of a head lamp) entering from an edge of the side wall portion outward without allowing the light to pass to the front wall portion
Implementation Method 3
light from a light source is reflected on two reflection portions through an air layer to allow a front panel of a meter to perform surface-emitting
Data Source
AI summary
Disclosed is a display device capable of achieving a decorative effect by utilizing a color filter at the front of a light-emitting display unit. Also disclosed is a meter device using the display device. Specifically disclosed is a display device comprising a light-emitting display unit and a color filter, which is arranged at the front of the light-emitting display unit. A light-emitting element for decoration is provided on the outside of the light-emitting display unit. The color filter is provided with a light-discharging surface for discharging the light from the light-emitting element for a decorative appearance in the forward direction.