Light emitting diode switch device and array

• US 9,471,181 B2
• Filed: 09/10/2014
• Issued: 10/18/2016
• 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:
  US14/482,909
• Publication Number:
  US 20150084932A1
• Time in Patent Office: 769 Days
• US Class Current: 1/1
• 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 touch input circuit, comprising:

a light emitting diode switch device including;

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

a first polarity lead electrically connected to the first polarity contact;

a second polarity lead electrically connected to the second polarity contact;

a first touch sensor structure of a unitary construction defined by a first touch sensor lead section, a first touch sensor contact section, and a first touch sensor lead frame section;

a case encapsulating the electroluminescent semiconductor element, the first touch sensor contact section, and the first touch sensor lead frame section;

wherein an entire structural contiguity of the first touch sensor lead frame section and the first touch sensor contact section are unexposed on an outer surface of the case, the first touch sensor contact section extending into the case with galvanic isolation of the first touch sensor lead frame section and the first touch sensor contact section being maintained relative to an exterior of the case while dielectric conduction from the exterior of the case to the first touch sensor lead frame section and the first touch sensor contact section is allowed;

at least one touch input transmission line electrically connected to the first touch sensor lead section of the light emitting diode switch device;

a touch input controller with an input that is singularly receptive to a capacitive touch input upon the light emitting diode switch device, a capacitive change to the first touch sensor contact section being conducted through an entire structural contiguity of the first touch sensor structure to the input of the touch input controller over the touch input transmission line.

2. The touch input circuit of claim 1, wherein the first touch sensor lead section is disconnected from the electroluminescent semiconductor element.

3. The touch input circuit of claim 1, wherein:

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

the second polarity lead is an anode.

4. The touch input circuit of claim 1, wherein:

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

the second polarity lead is a cathode.

5. The touch input circuit of claim 1, further comprising:

a second touch sensor structure defined by a second touch sensor lead section, a second touch sensor contact section, and a second touch sensor lead frame section, the second touch sensor structure being electrically connected to an independent capacitive touch sensor controller input and singularly receptive to the first capacitive touch input, a capacitance change to the second touch sensor contact section in response to the first capacitive touch input being conducted through an entire structural contiguity of the second touch sensor structure; and

wherein an entire structural contiguity of the second touch sensor lead frame section and the second touch sensor contact section are unexposed on an outer surface of the case, the second touch sensor contact section extends into the case with galvanic isolation of the second touch sensor lead frame section and the second touch sensor contact section being maintained relative to an exterior of the case while dielectric conduction from the exterior of the case to the second touch sensor lead frame section and the second touch sensor contact section is allowed.

6. The touch input circuit of claim 1, wherein the case is a through-hole package.

7. The touch input circuit of claim 6, wherein the case is at least partially translucent.

8. A combination input and output device, comprising:

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

a capacitive touch input controller integrated circuit including a plurality of independent input lines;

a plurality of touch input transmission lines electrically connected to a respective one of the plurality of independent input lines; and

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

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

a first polarity lead electrically connected to the first polarity contact;

a second polarity lead electrically connected to the second polarity contact;

a first touch sensor structure defined by a first touch sensor lead section, a first touch sensor contact section, and a first touch sensor lead frame section, the first touch sensor structure electrically connected to an independent capacitive touch sensor controller input and singularly receptive to a capacitive touch input, a capacitance change to the first touch sensor contact section in response to the capacitive touch input being conducted through an entire structural contiguity of the first touch sensor structure to a single one of the plurality of independent input lines of the capacitive touch input controller over a corresponding single one of the plurality of touch input transmission lines; and

a case encapsulating the electroluminescent semiconductor element, the first touch sensor contact section, and the first touch sensor lead frame section, the first touch sensor contact section and the first touch sensor lead frame section being unexposed on an outer surface of the case, with galvanic isolation of the first touch sensor lead frame section and the first touch sensor contact section being maintained relative to an exterior of the case while dielectric conduction from the exterior of the case to the first touch sensor lead frame section and the first touch sensor contact section is allowed;

wherein the first touch sensor structure detects capacitive touch input that at least partially corresponds to a position within the array of the one of the light emitting diode switch devices on which the capacitive touch input was detected.

9. The combination input and output device of claim 8, further comprising:

a data processing device electrically connected to the capacitive 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 capacitive touch input controller integrated circuit.

10. 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 sidewalls of the SMD package carrier;

a first lead frame structurally contiguous and in electrical communication with a first one of the plurality of leads and laterally extending in the interior of the SMD package carrier in a parallel relationship to the interior floor and fixed at least partially within the SMD package carrier;

a second lead frame structurally contiguous and in electrical communication with a second one of the plurality of leads and laterally extending in the interior of the SMD package carrier in a parallel relationship to the interior floor and fixed at least partially within the SMD package carrier;

a first electroluminescent semiconductor element with a first polarity electrode and a second polarity electrode, the first electroluminescent semiconductor element being mounted on the first lead frame with the first polarity electrode being in electrical communication therewith, and a second polarity electrode being electrically connected to the second lead frame with the second polarity electrode being in electrical communication therewith;

a first touch sensor lead frame structurally contiguous and in electrical communication with a third one of the plurality of leads and laterally extending in the interior of the SMD package carrier in a parallel relationship to the interior floor and fixed at least partially within the SMD package carrier;

a first touch sensor contact in electrical communication with the first touch sensor lead frame, the first touch sensor contact extending in a substantially orthogonal relationship to the first touch sensor lead frame and the interior floor;

a partially translucent case enclosing the open top of the SMD package carrier, the first touch sensor contact and the electroluminescent semiconductor element being unexposed on an outer surface of the case, with galvanic isolation of the first touch sensor contact being maintained relative to an exterior of the case while dielectric conduction from the exterior of the case to the first touch sensor contact is allowed.

11. The SMD package light emitting diode switch device of claim 10, wherein the first electroluminescent semiconductor element and the first touch sensor contact are at least partially visibly unobstructed from the exterior of the case.

12. The SMD package light emitting diode switch device of claim 10, further comprising:

a bond wire electrically connecting the second polarity electrode to the second lead frame.

13. The SMD package light emitting diode switch device of claim 10, further comprising:

a third lead frame structurally contiguous and in electrical communication with a fourth one of the plurality of leads and laterally extending in the interior of the SMD package carrier, the third lead frame being in a parallel relationship to the interior floor and fixed at least partially within the SMD package carrier; and

a second electroluminescent semiconductor element with a first polarity electrode and a second polarity electrode, the second electroluminescent semiconductor element being mounted on the third lead frame with the first polarity electrode being in electrical communication therewith, and a second polarity electrode being electrically connected to the second lead frame with the second polarity electrode being in electrical communication therewith;

wherein the first electroluminescent semiconductor element emits a different color than the second electroluminescent semiconductor element.

14. The SMD package light emitting diode switch device of claim 10, 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 a first independent capacitive touch sensor controller input.

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

17. The SMD package light emitting diode switch device of claim 16, wherein:

the first lead frame extends from an inner portion of the interior toward the first sidewall;

the first one of the plurality of leads, with which the first lead frame is contiguous, extends outwardly from the first sidewall.

18. The SMD package light emitting diode switch device of claim 17, wherein:

the second lead frame extends from an inner portion of the interior toward the second sidewall in an opposed relation to the first lead frame;

the second one of the plurality of leads, with which the second lead frame is contiguous, extends outwardly from the second sidewall.

19. The SMD package light emitting diode switch device of claim 17, wherein:

the touch sensor lead frame extends from an inner portion of the interior toward the second sidewall in an opposed relation to the first lead frame;

the third one of the plurality of leads, with which the touch sensor lead frame is contiguous, extends outwardly from the second sidewall.