Lamp bulb with integrated bulb control circuitry and method of manufacture

• US 5,126,634 A
• Filed: 09/25/1990
• Issued: 06/30/1992
• Est. Priority Date: 09/25/1990
• Status: Expired due to Term

• Current Assignee: Beacon Light Products, Inc.
• Original Assignee: Beacon Light Products, Inc.
• Inventors: Johnson, Samuel A.
• Primary Examiner(s): LaRoche, Eugene R.
• Assistant Examiner(s): Neyzari, Ali
• Application Number:
  US07/587,997
• Time in Patent Office: 644 Days
• Field of Search: 315/71, 315/70, 315/208, 315/360, 315/293, 315/297, 315/32, 315/72, 315/209 R, 315/205, 315/200 R, 315/64, 323/321
• US Class Current: 315/71
• CPC Class Codes: H01K 1/46 supported by a separate part, e.g. base, cap
• CPC Class Codes: H01K 1/62 One or more circuit elements structurally associated with the lamp

Abstract

An incandescent light bulb or the like and process for manufacturing same wherein an electronic control module (ECM) is installed, such as by press fitting into a dielectric insulating material at the socket end of the bulb, after the high temperature bulb fabrication steps have been completed. In this manner, the solid state and associated circuitry of the electronic contorl module are not subjected to the high temperature processing used in lamp bulb fabrication. The electronic control module is especially well suited and adapted for integration into the lamp bulb housing and is constructed using a minimum number of reliably constructed and connected electrical components in a hybrid-type circuit module assembly which is economical to manufacture. In one embodiment of the invention, this module is operative by rotational adjustment to provide lighting function control and selectivity for the bulb, and in both embodiments described herein it is in direct contact with the copper center terminal of an adjoining electrical socket. This feature provides excellent heat sinking for and cooling of the module.

Claims

1. A process for manufacturing an externally controllable light bulb which includes the steps of:

a. providing a light bulb having a filament wire therein and a dielectric insulator with a recessed cavity adjacent to an opening in said dielectric insulator extending into an interior section of said bulb,

b. providing an electronic control module having a diameter which is substantially coextensive with the diameter of said recessed cavity and being operative functionally to control one of a plurality of lighting functions of said light bulb, said electronic control module having a microprocessor therein connected to a TRIAC having a control gate, said control gate being connected to receive output signal from said microprocessor, and responsive to the on/off state of a power supply to receive control signal from said microprocessor to control the conductive state of said TRIAC,

c. mechanically and removably securing said electronic control module in said recessed cavity, and

d. connecting said electronic control module through said opening in said dielectric insulator to said filament wire for controlling one or a plurality of bulb lighting functions in response to the operation of said electronic control module, whereby said electronic control module may be removably secured into said cavity to aid in module interchangeability without requiring that said module be exposed to life testing and temperature cycling of said bulb during the manufacture thereof.

2. The process defined in claim 1 which further includes rotating said electronic control module or an electronic assembly therein to a predetermined angular position to thereby select a chosen lighting control function for said light bulb.

3. An externally controllable light bulb and article of manufacture including, in combination:

a. a light bulb housing having a filament wire therein and a dielectric insulator at one end of said bulb housing having a recessed cavity therein adjacent to an opening in said insulator which extends into an interior section of said bulb housing,

b. an electronic control module removably mounted in said recessed cavity and having a diameter which is substantially coextensive with the diameter of said recessed cavity and being operative functionally to control one or a plurality of lighting functions of said light bulb, said electronic control module having a microprocessor therein connected to a TRIAC having a control gate, said control gate being connected to receive output signal from said microprocessor, and responsive to the on/off state of a power supply to receive control signal from said microprocessor to control the conductive state of said TRIAC, and

c. means extending through said opening in said dielectric insulator and connected between said electronic control module and said filament for transmitting signals from said electronic control module to said filament for controlling one or a plurality of bulb lighting functions in response to the operation of said electronic control module, whereby said control module may be removably secured into said cavity to aid in module interchangeability without requiring that said module be exposed to life testing and temperature yielding of said bulb during the manufacture thereof.

4. The bulb defined in claim 3 which further includes means for rotating said electronic control module or an electronic assembly therein to a predetermined angular position to thereby select a chosen lighting control function for said light bulb.

5. The light bulb and article of manufacture defined in claim 3 wherein said electronic control module further includes:

a. a metal housing having a base member surrounded by an upstanding wall member defining an opening for said housing,

b. a substrate mounted on said base member,

c. bulb lighting control circuitry mounted on said substrate and having a conductive bridge member connected thereto for transmitting control signals from said bulb lighting control circuitry to a filament wire within said light bulb,

d. the TRIAC mounted on said substrate and connected to said conductive bridge, and

e. an integrated circuit control chip mounted on said substrate and connected to said TRIAC.

6. The light bulb and article of manufacture defined in claim 5 wherein said bulb lighting control circuitry includes:

a. data storage means therein containing lighting function control data for controlling one or more lighting functions of said bulb, and

b. a plurality of function-select lines and terminals connected between said data storage means and a plurality of separate contact pads on said electronic control module, whereby said electronic control module may be rotated within said dielectric material to a predetermined angular position and thereby connect one of said contact pads to an operating voltage sufficient to activate a chosen lighting function control data within said data storage means.

7. The light bulb and article of manufacture defined in claim 3 wherein said electronic control module includes:

a. data storage means therein containing lighting function control data for controlling one or more lighting functions of said bulb, and

b. a plurality of function-select lines and terminals connected between said data storage means and a plurality of separate contact pads on said electronic control module, whereby said electronic control module may be rotated within said dielectric material to a predetermined angular position and thereby connect one of said contact pads to an operating voltage sufficient to activate a chosen lighting function control data within said data storage means.