Beam-Splitting Film and Diffuser Layout for Uniform Display Brightness
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Solution Overview
Problem
Electronic devices face challenges in achieving high display quality due to non-uniform brightness and inefficient light utilization, particularly in compact and thin designs where light distribution is uneven.
Innovation Solution
Incorporating a beam splitting film with specific transmittance characteristics between a light emitting module and a diffuser plate, which filters and reflects light to improve utilization efficiency and uniformity, while the diffuser plate scatters light to enhance brightness consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional light emitting module is used without a beam splitting film, then the structure is simple, but the brightness is non-uniform and light utilization efficiency is low
Solution Approach 1:
A beam splitting film is introduced as an intermediary component between the light emitting module and the diffuser plate. This film has wavelength-selective transmittance characteristics that split the light spectrum, allowing different wavelengths to be directed to different regions. The beam splitting film acts as a mediator that redistributes light energy to achieve uniform brightness without requiring complex structural modifications to the light emitting module itself.
Solution Approach 2:
The beam splitting film exhibits spatially varying optical properties with different transmittance for different wavelength bands at different locations. This local quality variation allows specific regions to receive appropriate wavelengths for optimal brightness, creating a non-uniform light distribution pattern that compensates for the inherent non-uniformity of the light emitting module and achieves overall uniformity.
2Illumination intensity
If the light emitting module operates at high intensity to improve display quality, then the brightness increases, but the light utilization efficiency decreases due to uneven distribution
Solution Approach 1:
The beam splitting film segments the light spectrum into different wavelength bands and directs each band to specific regions. This segmentation allows the light energy to be distributed more efficiently across the display area, ensuring that each region receives the appropriate amount of light energy. By dividing the light distribution task into wavelength-specific channels, the system achieves better overall utilization of the light source energy.
Solution Approach 2:
The beam splitting film utilizes wavelength-dependent transmittance parameters to control light distribution. By changing the optical parameters (transmittance) based on wavelength, the film optimizes the distribution of light energy across different spatial regions. This parameter-based control allows high-intensity operation of the light emitting module while maintaining efficient energy utilization through selective wavelength routing.
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 improves the display quality by reducing brightness differences and increasing the utilization rate of the light source, resulting in more uniform and efficient light distribution, thus addressing issues of poor visual quality.
Implementation Method 1
the beam splitting film has a first transmittance for a first waveband, and the beam splitting film has a second transmittance for a second waveband other than the first waveband
Implementation Method 2
the beam splitting film is arranged between the light emitting module and the diffuser plate
Implementation Method 3
the diffuser plate scatters light to enhance brightness consistency
Data Source
AI summary
An electronic device includes a light emitting module, a beam splitting film and a diffuser plate. The light emitting module provides a light having a first waveband. The beam splitting film is arranged on the light emitting module. The diffuser plate is arranged on the light emitting module, wherein the beam splitting film is arranged between the light emitting module and the diffuser plate. The beam splitting film has a first transmittance for the first waveband, and the beam splitting film has a second transmittance for a second waveband other than the first waveband, where the first transmittance is greater than the second transmittance.