Light emitting diode switch device and array

• US 9,851,826 B2
• Filed: 09/29/2016
• Issued: 12/26/2017
• Est. Priority Date: 01/21/2011
• Status: Active Grant

• Current Assignee: Peter Sui Lun Fong
• Original Assignee: Peter Sui Lun Fong
• Inventors: Fong, Peter Sui Lun
• Primary Examiner(s): EURICE, MICHAEL
• Application Number:
  US15/280,619
• Publication Number:
  US 20170024045A1
• Time in Patent Office: 453 Days
• CPC Class Codes: A61L 2/10 Ultraviolet radiation
• CPC Class Codes: A61L 2202/11 Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
• CPC Class Codes: G05B 19/409 characterised by using manual data input [MDI] or by using control panel, e.g. controlling functions with the panel; characterised by control panel details or by setting parameters G05B19/408, G05B19/4093 take precedence
• CPC Class Codes: G05B 2219/35412 Special interface for manual input to pc
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G09G 3/14 Semiconductor devices, e.g. diodes
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 25/167 comprising optoelectronic devices, e.g. LED, photodiodes
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/12041 LED
• CPC Class Codes: H01L 2924/19041 being a capacitor
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 47/115 by determining the presence or movement of objects or living beings
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

An LED switch device and a matrix thereof are disclosed. There is an electroluminescent semiconductor element with a first polarity contact and a second polarity contact. There is also a first polarity LED lead frame, to which the electroluminescent semiconductor element is mounted. The first polarity contact of the electroluminescent semiconductor element is electrically connected to the first polarity LED lead frame. The LED switch device has a second polarity LED lead frame electrically connected to the second polarity contact of the electroluminescent semiconductor element. The LED switch device also has a touch sensor lead frame that is electrically connected to a touch sensor lead.

Claims

1. A combination light emitting diode and electrical switch device, comprising:

at least one electroluminescent semiconductor element with a first electrode and a second electrode;

a first lead electrically connected to the first electrode of the electroluminescent semiconductor element;

a second lead electrically connected to the second electrode of the electroluminescent semiconductor element and connectible to a light emitting diode driver circuit;

a first touch sensor lead connectible to an input port of a touch input controller;

a first touch sensor contact electrically connected to the first touch sensor lead, the first touch sensor contact being responsive to a capacitance change thereof from a touch input; and

a case encapsulating the electroluminescent semiconductor element and the first touch sensor contact, light emitted from the at least one electroluminescent semiconductor element being at least partially unobstructed by the first touch sensor contact.

2. The combination light emitting diode and electrical switch device of claim 1, further comprising:

at least one touch input transmission line electrically connected to the first touch sensor contact; and

a touch input controller with an input port that is in electrical communication with the first touch sensor contact over a first one of the at least one touch input transmission line, the capacitance change of the first touch sensor contact being passed to the input port of the touch input controller over the touch input transmission line.

3. The combination light emitting diode and electrical switch device of claim 1, wherein the first touch sensor lead is disconnected from the at least one electroluminescent semiconductor element.

4. The combination light emitting diode and electrical switch device of claim 1, wherein:

the first lead is a cathode to which a negative power supply voltage is applied as a negative common; and

the second lead is an anode.

5. The combination light emitting diode and electrical switch device of claim 1, wherein:

the first lead is an anode to which a positive power supply voltage is applied as a positive common; and

the second lead is a cathode.

6. The combination light emitting diode and electrical switch device of claim 1, wherein the case is a through-hole package.

7. The combination light emitting diode and electrical switch device of claim 6, wherein the case is at least partially translucent.

8. A surface mount device (SMD) package light emitting diode switch device, comprising:

an SMD package carrier with an open top and an interior defined by a plurality of sidewalls and an interior floor opposed to the open top;

a plurality of leads extending outwardly from the SMD package carrier;

a first lead frame in electrical communication with a first one of the plurality of leads and extending in the interior of the SMD package carrier;

a second lead frame in electrical communication with a second one of the plurality of leads and extending in the interior of the SMD package carrier;

a first electroluminescent semiconductor element with a first electrode and a second electrode, the first electroluminescent semiconductor element being mounted on the first lead frame with the first electrode being electrically connected thereto, and the second electrode being electrically connected to the second lead frame;

a first touch sensor lead frame electrically connected to a third one of the plurality of leads and extending in the interior of the SMD package carrier;

a first touch sensor contact electrically connected to the first touch sensor lead frame, the first touch sensor contact being positioned at least partially inside the SMD package carrier; and

an at least partially translucent case enclosing the open top of the SMD package carrier, the electroluminescent semiconductor element being unexposed on an outer surface of the case.

9. The SMD package light emitting diode switch device of claim 8, wherein the first electroluminescent semiconductor element and the first touch sensor contact are at least partially visibly unobstructed from the exterior of the case.

10. The SMD package light emitting diode switch device of claim 8, wherein the plurality of sidewalls includes a first sidewall and an opposed second sidewall.

11. The SMD package light emitting diode switch device of claim 8, wherein at least a part of the first touch sensor lead frame extends in a parallel relationship to the interior floor of the SMD package carrier.

12. The SMD package light emitting diode switch device of claim 8, further comprising a bond wire electrically connecting the second electrode of the first electroluminescent semiconductor element to the second lead frame.

13. The SMD package light emitting diode switch device of claim 8, further comprising:

a third lead frame in electrical communication with a fourth one of the plurality of leads and extending in the interior of the SMD package carrier; and

a second electroluminescent semiconductor element with a first electrode and a second electrode, the second electroluminescent semiconductor element being mounted on the third lead frame with the first electrode being in electrical communication therewith, and the second electrode being electrically connected to the second lead frame with the second electrode being in electrical communication therewith, the second electroluminescent semiconductor element emitting a different wavelength of light than that of the first electroluminescent semiconductor element.

14. The SMD package light emitting diode switch device of claim 8, wherein the first touch sensor contact, the first touch sensor lead frame, and the third one of the plurality of leads collectively define a single, unitary first touch sensor structure.

15. The SMD package light emitting diode switch device of claim 14, wherein the first touch sensor structure is electrically connected to an input port of a touch input controller.

16. A combination light emitting diode and electrical switch device, comprising:

at least one electroluminescent semiconductor element with a first electrode and a second electrode;

a first conductive element electrically connected to the first electrode of the electroluminescent semiconductor element;

a second conductive element electrically connected to the second electrode of the electroluminescent semiconductor element;

a first touch sensor conductive element;

a first touch sensor contact electrically connected to the first touch sensor conductive element, the first touch sensor contact being responsive to a capacitance change thereof from a touch input;

a touch input controller integrated circuit with an input port that is in electrical communication with the first touch sensor contact over a first one of the at least one touch input transmission line connected to the first touch sensor conductive element, the capacitance change of the first touch sensor contact being passed to the input port of the touch input controller integrated circuit over the touch input transmission line;

a printed circuit board on which the touch input controller integrated circuit is mounted; and

a case encapsulating the electroluminescent semiconductor element, the first touch sensor contact, and the printed circuit board, light emitted from the at least one electroluminescent semiconductor element being at least partially unobstructed by the first touch sensor contact.

17. The combination light emitting diode and electrical switch device of claim 16, further comprising:

a light emitting diode driver integrated circuit connected to the second conductive element and mounted to the printed circuit board, the light emitting diode driver integrated circuit being encapsulated within the case.

18. The combination light emitting diode and electrical switch device of claim 17, further comprising:

a data processing device with an input port and an output port, the input port of the data processing device being connected to the touch input controller integrated circuit and the output port of the data processing device being connected to the light emitting diode driver integrated circuit, the data processing device generating a predetermined electrical signal output to the light emitting diode driver integrated circuit in response to an electrical signal input from the touch input controller integrated circuit.

19. The combination light emitting diode and electrical switch device of claim 17, wherein the at least one electroluminescent semiconductor element is mounted to the printed circuit board.

20. A combination input and output device, comprising:

a light emitting diode driver integrated circuit including a plurality of output lines;

a touch input controller integrated circuit including a plurality of input lines; and

an array of light emitting diode switch devices, each device including;

at least one electroluminescent semiconductor element with a first electrode and a second electrode; and

a touch sensor contact responsive to a capacitance change thereof from a touch input;

a printed circuit board on which the touch input controller integrated circuit, the light emitting diode driver integrated circuit, and each of the light emitting diode switch devices of the array are mounted, the printed circuit board including a first set of traces each connected to the first electrode of each of the light emitting diode switch devices in the array to a respective one of the plurality of output lines of the light emitting diode driver integrated circuit, and a second set of traces each connected to the second electrode of each of the light emitting diode switches in the array to ground, a third set of traces each connected to the touch sensor contact of each of the light emitting diode switch devices in the array to a respective one of the plurality of input lines of the touch input controller integrated circuit; and

a case encapsulating the array of light emitting diode switch devices.

21. The combination input and output device of claim 20, wherein the case encapsulates the light emitting diode driver integrated circuit and the touch input controller integrated circuit.

22. The combination input and output device of claim 20, further comprising a plurality of wirebonds each interconnecting the first electrode of each of the light emitting diode switch devices to the respective one of the first set of traces on the printed circuit board.

23. The combination input and output device of claim 20, further comprising a plurality of wirebonds each interconnecting the second electrode of each of the light emitting diode switch devices to the respective one of the second set of traces on the printed circuit board.

24. The combination input and output device of claim 20, further comprising:

a data processing device electrically connected to the touch input controller integrated circuit and the light emitting diode driver integrated circuit, the data processing device being programmed with executable instructions for generating outputs to the light emitting diode driver integrated circuit in response to inputs from the touch input controller integrated circuit.

25. The combination input and output device of claim 20, wherein each of the light emitting diode switch devices includes a touch sensor conductive element to which the touch sensor contact is connected.

26. The combination input and output device of claim 25, further comprising a plurality of wirebonds each interconnecting the touch sensor conductive element of each of the light emitting diode switch devices to the respective one of the third set of traces on the printed circuit board.