# US 2017/0254484 A1 · Retrofit lamp

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- Number: US 2017/0254484 A1
- Document ID: US20170254484A1
- Status: Published application
- Kind: A1
- Application number: 15/451,762
- Filed: 2017-03-07
- Published: 2017-09-07
- Earliest claimed: 2016-03-07
- Assignees: OSRAM GmbH
- Applicants: OSRAM GmbH
- Inventors: Lambert Frye; Klaus Eckert; Isabell Sklorz
- Web page: https://patentgrep.com/patent/US20170254484A1

## CPC

- F21K 9/237: Details of housings or cases, i.e. the parts between the light-generating element and the bases; Arrangement of components within housings or cases (F21K9/238 takes precedence)
- F21K 9/232: specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
- F21K 9/238: Arrangement or mounting of circuit elements integrated in the light source
- F21K 9/69: Details of refractors forming part of the light source
- F21K 9/90: Methods of manufacture
- F21V 5/04: of lens shape
- F21V 5/10: comprising photoluminescent material
- F21V 19/003: {Fastening of light source holders, e.g. of circuit boards or substrates holding light sources}
- F21V 19/004: {by deformation of parts or snap action mountings, e.g. using clips}
- F21V 29/70: characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21K 9/235: Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps (F21K9/238 takes precedence)
- F21V 17/16: by deformation of parts; Snap action mounting
- F21V 29/89: Metals
- F21Y 2105/10: comprising a two-dimensional [2D] array of point-like light-generating elements
- F21Y 2115/10: Light-emitting diodes [LED]
- Y02B 20/30: Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
- F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS

## Abstract

A retrofit lamp (1) comprises a heat sink (8), a light source module (10) with a circuit board (11), whose rear side lies two-dimensionally on the heat sink (8) and at the front side of which at least one semiconductor light source (12) is arranged, and a ring (6) partially covering the front side of the light source module (10), wherein the ring (6) presses the light source module (10) onto the heat sink (8). A method serves for producing a retrofit lamp (1), wherein the rear side of the circuit board (11) of the light source module (10) is laid on the heat sink (8) and the ring (6) is put on the retrofit lamp (1) from the front such that it presses the light source module (10) onto the heat sink (8). The invention is particularly applicable to LED retrofit lamps for replacing conventional light bulbs or halogen lamps.

## Claims

### Claim 1

A retrofit lamp, comprising
a heat sink,
a light source module with a circuit board whose rear side lies two-dimensionally on the heat sink and at the front side of which at least one semiconductor light source is arranged, and
a ring partially covering the front side of the light source module, wherein
the ring presses the light source module onto the heat sink

### Claim 2 (depends on 1)

The retrofit lamp according to claim 1, wherein the ring is locked with the heat sink.

### Claim 3 (depends on 1)

The retrofit lamp according to claim 1, wherein the ring comprises inwardly directed, elastically flexible pressing tabs resting on the front side of the light source module.

### Claim 4 (depends on 3)

The retrofit lamp according to claim 3, wherein the pressing tabs, at their side facing the light source module, comprise at least one projection resting on the front side of the light source module.

### Claim 5 (depends on 3)

The retrofit lamp according to claim 3, wherein the pressing tabs are uniformly arranged in an angle-offset manner in circumferential direction.

### Claim 6 (depends on 3)

The retrofit lamp according to claim 3, wherein the ring has a vertical sidewall to which the pressing tabs are joined protruding inwards at the front.

### Claim 7 (depends on 1)

The retrofit lamp according to claim 1, wherein the ring consists of fiber reinforced plastics.

### Claim 8 (depends on 1)

The retrofit lamp according to claim 1, wherein the ring is configured for locking with at least one optical element.

### Claim 9 (depends on 1)

The retrofit lamp according to claim 1, wherein the light source module is connected with the heat sink without an adhesive.

### Claim 10 (depends on 1)

A method for producing a retrofit lamp according to claim 1, wherein the rear side of the circuit board of the light source module is laid on the heat sink and then the ring is put on the retrofit lamp from the front such that it presses the light source module onto the heat sink.