Display Device Attenuating Plate Reflection Plate Luminance Uniformity
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Solution Overview
Problem
Conventional display devices with light source units on inner surfaces face issues where luminance on the display panel can either increase excessively or decrease locally due to the attenuation by semitransparent plates, leading to uneven luminance.
Innovation Solution
A display device configuration that includes a light source unit with an optical lens, an attenuating plate to reduce light intensity, and a reflection plate to redirect light, both integrally formed to maintain even luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a semitransparent plate is used to attenuate light intensity, then luminance increase on the display panel is suppressed, but luminance decreases excessively locally
Solution Approach 1:
The light control function is segmented into multiple components: the semitransparent plate for attenuation, the reflection plate for redirecting light, and the light diffusion plate for uniform distribution. This segmentation allows each component to perform its specific function optimally, preventing excessive luminance decrease while maintaining uniformity.
Solution Approach 2:
The reflection plate acts as an intermediary between the light source and the display panel, capturing light that would otherwise be lost and redirecting it toward the display panel. This mediator component recovers attenuated light and redistributes it, preventing local luminance decreases.
2Manufacturing precision
If light diffusion plate is used to diffuse light, then uniform illumination is achieved, but light intensity is reduced excessively
Solution Approach 1:
The reflection plate ensures continuity of useful action by capturing and redirecting light that passes through the diffusion plate back toward the display panel. This creates a continuous light path that maintains intensity while preserving the uniforming effect of the diffusion plate.
Solution Approach 2:
Different regions of the optical system are assigned different qualities: the diffusion plate provides uniforming in areas where light distribution is needed, while the reflection plate provides high reflectivity in areas where light recovery is needed. This local differentiation optimizes both uniformity and intensity.
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 effectively suppresses both excessive luminance increases and decreases on the display panel, ensuring uniform illumination by diffusing and reflecting light efficiently.
Implementation Method 1
an optical lens covering the light source
Implementation Method 2
an attenuating plate that is disposed between the light source unit and the display panel, and attenuates an intensity of light irradiated from the light source unit
Implementation Method 3
a light diffusion plate that diffuses light
Implementation Method 4
a reflection plate that reflects the light having passed through the attenuating plate toward the display panel
Data Source
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AI summary
A display device includes: a display panel (1); a housing (2) that comprises a front face in which the display panel is disposed; a light source unit (3) that is disposed on an inner surface of the housing (2), and comprises a light source (3a) and an optical lens (3b) covering the light source; an attenuating plate (4) that is disposed between the light source unit (3) and the display panel (1), and attenuates an intensity of light irradiated from the light source unit, the light passing through the attenuating plate (4) toward the display panel (1); and a reflection plate (5) that reflects the light having passed through the attenuating plate (4) toward the display panel (1).