Flat illumination device having edge lighting

• US 10,641,949 B2
• Filed: 04/18/2018
• Issued: 05/05/2020
• Est. Priority Date: 06/23/2017
• Status: Active Grant

• Current Assignee: Yuriy Borisovich Sokolov
• Original Assignee: Yuriy Borisovich Sokolov
• Inventors: Sokolov, Yuriy Borisovich
• Primary Examiner(s): Raabe, Christopher M
• Application Number:
  US16/343,635
• Publication Number:
  US 20190293862A1
• Time in Patent Office: 748 Days
• Field of Search: 362612
• CPC Class Codes: F21S 8/00 Lighting devices intended for fixed installation F21S9/00, F21S10/00 take precedence; using a string or strip of light sources F21S4/00
• CPC Class Codes: F21V 15/01 Housings, e.g. material or assembling of housing parts F21V15/02 takes precedence housings forming signs or letters G09F13/04
• CPC Class Codes: F21V 17/00 Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages of light sources or light holders F21V19/00
• CPC Class Codes: F21V 23/007 enclosed in a casing
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 7/00 Reflectors for light sources characterised by cooling arrangements F21V29/505
• CPC Class Codes: F21Y 2103/10 comprising a linear array of point-like light-generating elements
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02B 6/0081 Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
• CPC Class Codes: G02B 6/0083 Details of electrical connections of light sources to drivers, circuit boards, or the like
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02B 6/0091 of the light source relative to the light guide G02B6/0021 takes precedence

Abstract

The solution relates to lighting engineering, namely to thin illumination devices having a lateral arrangement of LEDs, which are intended for use as immovably fixed ceiling and wall lights. The technical result of the claimed solution is increased structural strength and improved compactness on account of a monoblock design. The device comprises a housing formed by successively connected plastic profiles, a flat light guide, a U-shaped metallic LED board which is mounted in a cavity of a profile having an open cavity, and a power source arranged in a profile having a closed cavity.

Claims

1. An edge-lit flat panel unit comprising:

a planar light guide having multiple end surfaces and comprising an optical plate of at least one of glass and plastic;

an LED card mounted on at least one of the end surfaces of the planar light guide; and

multiple extruded profiles that are connected in series and that are coupled together with connection elements to form a frame,

wherein each of the extruded profiles defines a first open cavity that receives one of the end surfaces of the planar light guide,

wherein a first of the extruded profiles defines a second open cavity that comprises a printed circuit board comprising an LED, the LED being configured to deliver light to one of the end surfaces of the planar light guide,

wherein a second of the extruded profiles defines a closed cavity comprising at least one of;

(a) a power supply of the LED and (b) a light control circuit of the LED,

wherein the extruded profiles and the connection elements comprise an insulating plastic;

wherein the LED card has a U-shaped profile comprising a middle section and lateral sections,

wherein the lateral sections are installed along walls of the second cavity to provide reinforcement and heat exchange to the first of the extruded profiles that defines the second open cavity and that houses the LED card,

wherein the lateral sections of the LED card comprise a light reflective material, and

wherein the LED card comprises a limiter that is configured to space the planar light guide not closer than 0.1 mm of an LED of the LED card.

2. The edge-lit flat panel unit of claim 1, wherein an end of at least one of the extruded profiles is fitted with an end plug that is attached to at least one of the connection elements to connect two of the extruded profiles.

3. The edge-lit flat panel unit of claim 1, wherein the LED power supply is not isolated from a network.

4. The edge-lit flat panel unit of claim 1, wherein a portion of at least one of the extruded profiles comprises a projection that contacts a face of the planar light guide to prevent parasitic illumination.

5. The edge-lit flat panel unit of claim 1, wherein a first and a second wall of the first open cavity each comprise a protrusion that is configured to prevent parasitic illumination.

6. The edge-lit flat panel unit of claim 1, wherein the closed cavity comprises the power supply of the LED.