Silkscreen-Printed Dot Pattern Light Guide Plate
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Solution Overview
Problem
Conventional lighting apparatuses face issues with luminance nonuniformity and low light transmittance due to transparent or white pigment in substrates, reflection sheets, and pattern films on light guide plates.
Innovation Solution
A lighting apparatus featuring a light guide plate with a silkscreen-printed dot pattern on one surface, using special ink, and an LED light source positioned to face the end face of the plate, allowing for uniform light diffusion and emission with high transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transparent or white pigment is mixed in the substrate material to diffuse light, then light diffusion is improved, but luminance nonuniformity occurs and light transmittance degrades
Solution Approach 1:
The invention segments the light diffusion function from the substrate material by removing pigments from the bulk material and concentrating them only in specific surface regions (dot patterns). This allows the substrate to remain transparent while localized pigment regions provide controlled light diffusion, eliminating luminance nonuniformity caused by homogeneous pigment distribution.
Solution Approach 2:
The invention applies light-diffusing pigment only in specific local regions (dot patterns) on the light guide plate surface rather than uniformly throughout the entire substrate. This local application of pigment provides light diffusion exactly where needed while maintaining transparency and uniformity in other areas, resolving the contradiction between light diffusion and luminance uniformity.
2Illumination intensity
If transparent or white pigment is mixed in the substrate material to diffuse light, then light diffusion is improved, but light transmittance degrades
Solution Approach 1:
By segmenting the pigment distribution to only surface dot patterns rather than bulk mixing, the invention minimizes the total amount of pigment in the light path. This allows light diffusion to occur at the surface level while the bulk substrate remains transparent, preserving light transmittance while achieving the desired diffusion effect.
Solution Approach 2:
The localized dot pattern application of pigment ensures that light diffusion occurs only in specific regions rather than throughout the entire light path. This local quality approach maintains high light transmittance in areas without pigment while providing controlled diffusion where dots are present, resolving the contradiction between diffusion and transmittance.
3Illumination intensity
If a reflection sheet is provided on the light guide plate to improve light distribution, then light distribution is improved, but light transmittance becomes low
Solution Approach 1:
The invention extracts the light distribution function from a separate reflection sheet component and integrates it directly into the light guide plate surface through dot patterns. This eliminates the need for a separate reflection sheet that would block light transmission, achieving light distribution through surface-level dot patterns that do not impede overall light transmittance.
4Adaptability or versatility
If pattern films are provided on the light-emitting layers to create designs, then design functionality is improved, but light transmittance degrades
Solution Approach 1:
The invention merges the light diffusion function and the pattern design function into a single integrated dot pattern structure on the light guide plate surface. The same dot patterns that provide light diffusion also create the desired visual designs, eliminating the need for separate pattern films that would additional block light transmission.
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 maintains uniform brightness and achieves sufficient light transmittance, providing a brighter and more efficient lighting apparatus with improved light distribution.
Implementation Method 1
a silkscreen-printed dot pattern to diffuse light, the pattern provided only on one face of the pair of faces of the light guide plate and formed with a special ink
Data Source
AI summary
The lighting apparatus 10 includes a light guide plate 11 made of a transparent material and having a pair of faces 12a, 12b opposing each other and an end face adjoining the faces, a silkscreen-printed dot pattern 13 used to diffuse light, provided only on the face 12a of the light guide plate 11 and formed with a special ink, and an LED light source 20 disposed so as to face the end face of the light guide plate 11. The face 12a of the light guide plate 11 provided with the silkscreen-printed pattern 13 serves, as it is, as a light-emitting surface.