Touch Pad Colorful Backlighting via Segmented Filter Layer
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Solution Overview
Problem
Existing touch pads lack interactivity due to monochromatic backlighting, which affects user experience and sensitivity, as adding color options increases thickness and reduces accuracy.
Innovation Solution
A touch pad design incorporating a capacitive sensor, light guiding plate, filter layer with non-overlapping regions, and an RGB light emitting module, allowing light to pass through different filters to produce varying shades, enabling colorful identification without increasing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple colors are configured for the backlight of the touch pad, then the identification becomes more colorful and interactive, but the thickness of the touch pad increases
Solution Approach 1:
The filter layer is divided into multiple non-overlapping filter regions, each containing filters of different colors. This segmentation allows multiple colors to be achieved in a single layer without stacking multiple backlight units, thus maintaining thin profile while providing colorful identification.
Solution Approach 2:
Instead of adding color through the thickness dimension (stacking multiple colored backlight units), the patent transitions to the planar dimension by arranging different color filters in separate regions within the same layer. This dimensional shift enables colorful display without increasing overall thickness.
2Adaptability or versatility
If multiple colors are configured for the backlight of the touch pad, then the identification becomes more colorful and interactive, but the sensitivity and accuracy of the touch pad are affected
Solution Approach 1:
By segmenting the filter layer into non-overlapping filter regions, each region maintains independent optical path without interfering with the underlying capacitive sensor. This ensures that the sensor can accurately detect touch gestures while the filter layers provide colorful identification above them.
Solution Approach 2:
The light guiding plate acts as an intermediary that directs light from the backlight unit through specific filter regions while maintaining the structural integrity and sensitivity of the capacitive sensor below. This intermediary structure allows colorful display without compromising touch detection accuracy.
3Length of stationary object
If a single color backlight is used for the touch pad, then the thickness and sensitivity are maintained, but the identification becomes monotonous and lacks interactivity
Solution Approach 1:
Different regions of the filter layer are assigned different color filters, creating local quality variations. This allows specific areas of the touch pad to display different colors for different identification purposes, enhancing interactivity and information conveyance while maintaining overall thin structure.
Solution Approach 2:
The patent implements color changes by incorporating multiple colored filters in different regions of the filter layer. This enables the touch pad to display different colors for different functional areas or states, transforming the monotonous single-color display into a colorful and interactive identification system.
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 design enhances user experience by providing colorful backlighting without compromising sensitivity or accuracy, expanding application scenarios and improving touch pad interaction.
Implementation Method 1
a light emitting module having a light emitting surface, wherein the light emitting module is disposed at the periphery of the light guiding plate; wherein the light emitting surface provides light to the light guiding plate
Implementation Method 2
the light passes through the first filter region to be a first shade, and the light passes through the second filter region to be a second shade; the color of the first shade is different from the color of the second shade
Data Source
AI summary
A touch pad comprises a capacitive sensor for sensing a manipulation gesture; a light guiding plate arranged on the capacitive sensor; an identification layer having a pattern disposed on the light guiding plate; a filter layer disposed on the identification layer, the filter layer having a first filter region and a second filter region, wherein the first filter region and the second filter region do not overlap; and a light emitting module having a light emitting surface, wherein the light emitting module is disposed at the periphery of the light guiding plate; wherein the light emitting surface provides light to the light guiding plate; the light passes through the first filter region to be a first shade, and the light passes through the second filter region to be a second shade; the color of the first shade is different from the color of the second shade.