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Patent Information & Production OptionsDesk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet · Patent CN118167961B

Patent CN118167961B: bibliographic data, legal status, family, a plain-language reading of the claims, plus customization, US compliance points and how a manufacturing project runs.

At a glance

Patent numberCN118167961B (application CN202410282897)
TypeChina invention patent (发明专利) - protects technical solution and structure
Original titleDesk lamp capable of adjusting light-emitting angle (一种调节出光角度的台灯)
Patent ownerShenzhen Deled Led Co ltd
InventorsMin Changwei, Min Xuanhaolan, Hu Aibin, Li Xiong, Tang Jinlong, Duan Xinnan, Yan Wei
Filing date2024-03-12
Grant date2024-12-17
Status (China)In force - valid until at most 2044-03-12, provided annual fees are paid
Patent familyChinese filings only - no US, European, Japanese, PCT or other filings listed
Cited by0 later documents
SourceGoogle Patents (search for CN118167961B)

What the claims cover, in plain language

Claim 1 defines a desk lamp comprising a base, a hinged lamp post, and a lamp cap. The cap contains a housing, a sleeve, and an optical module. The module includes an annular lamp belt, a light guide plate, a reflecting film, a diffusion film, and a prism sheet. The key structural limitation is that the prism sheet is slidably connected between the light guide plate and the diffusion film. The prism sheet has arc-shaped curved side surfaces with an initial included angle of 135-175 degrees. Adjusting the distance between the prism and diffusion film changes the refraction angle of the emitted light.

Claim 2 specifies the lamp belt as a flexible strip with spaced LED beads, forming an annulus that abuts the inner wall of the sleeve, with light entering the cylindrical guide plate radially.

Claim 3 details the orientation: the guide plate has second and third emitting surfaces; the prism’s input face faces the second surface; the reflecting film faces the third surface to bounce light back into the guide.

Claim 4 states the reflecting film is attached to the third surface and has a radial distance greater than the guide plate.

Claim 5 adds a flexible gasket between the reflecting film and the sleeve bottom for axial support.

Claims 6-8 cover further structural details of the housing shells and attachment mechanisms.

This is a simplified reading for orientation only. The legal scope is defined by the exact claim wording in the official Chinese document.

What this means for US production

This patent was filed only in China and is currently in force. Making or selling products that infringe these claims in China requires permission from the patent owner. For production outside China, this specific patent does not restrict sales in the US or Europe.

Two points to settle early:

  • Other patents may exist. Optical adjustments in LED lamps are a crowded field. While no foreign citations are listed for this specific document, major lighting companies hold broad patents on variable optics, lens positioning, and anti-glare structures. A freedom-to-operate (FTO) review is recommended before tooling to ensure your implementation of the sliding prism mechanism does not conflict with existing US utility patents.
  • Mechanical Tolerance. The performance relies heavily on the precise gap distance L and the arc radius R. Manufacturing tolerances for the sliding track and prism sheet thickness must be tight to maintain the optical effect described in the claims.

Customization and manufacturing

What can be customized

AreaOptions
Beam Angle RangeAdjusted by changing the travel limit of the prism slider (e.g., 30° to 60° spread).
Color TemperatureStandard 2700K-6500K tunable white or single CCT options for the LED belt.
MaterialPC or PMMA for the prism and guide plates; aluminum or ABS for the housing.
Control MechanismManual slide knob, motorized adjustment via remote/app, or preset positions.
Form FactorDiameter of the lamp head and length of the post can be scaled.

Things to plan for (US market)

  • FCC Part 15: Electronic ballasts/drivers and wireless modules (if smart-controlled) must meet EMC standards.
  • UL/ETL Listing: Safety certification for electrical components is standard for US retail entry.
  • ENERGY STAR: If targeting energy efficiency labels, strict lumen maintenance and power factor requirements apply.
  • California Title 20: Appliance efficiency regulations may apply depending on wattage and standby power.

How a project runs

  1. Inquiry - Define target beam angle range, lumens, and physical dimensions.
  2. Design - CAD modeling of the optical stack, specifically the prism groove geometry and slider interface.
  3. Prototype - 3D printed housings and CNC-machined or molded optical components for light testing.
  4. Pilot Run - Injection mold trials for prism/guide plates; verify angle consistency across units.
  5. Production - Mass molding, LED assembly, driver integration, and aging tests.

Quantities & timeline

Precision injection molds for the prism sheet are critical due to the complex arc-shaped grooves. Tooling lead time typically ranges from 6-8 weeks. Optical alignment fixtures are needed for assembly to ensure the prism stays parallel to the diffusion film. Send us your target beam angles, lumens, color temperature, and estimated quantity and we will reply with options.

Patent drawings

Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 1
Fig. 1 - Perspective view of the desk lamp.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 2
Fig. 2 - Exploded view of the lamp cap assembly.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 3
Fig. 3 - Cross-sectional view of the optical module.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 4
Fig. 4 - Structural diagram of the prism sheet.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 5
Fig. 5 - Enlarged view of the prism sheet grooves.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 6
Fig. 6 - Diagram of light refraction paths.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 7
Fig. 7 - Alternative embodiment of the slider mechanism.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 8
Fig. 8 - Detail of the housing connection.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 9
Fig. 9 - Circuit schematic of the LED drive.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 10
Fig. 10 - Flowchart of the angle adjustment logic.
Desk Lamp with Adjustable Light-Emitting Angle via Sliding Prism Sheet - Patent Fig. 11
Fig. 11 - Comparison of light distribution curves.

Drawings reproduced from the public patent document for reference.

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This page is based on the public patent document CN118167961B, assigned to Shenzhen Deled Led Co ltd. IP2M is an independent manufacturing service and is not affiliated with, endorsed by or licensed by the patent owner. Images marked as concept renderings are illustrations, not photos of an existing product. Patent status information is provided for reference only and is not legal advice; confirm freedom to operate for your market before production. Full disclaimer.