Light emitting diode switch device and array

• US 8,866,708 B2
• Filed: 01/21/2011
• Issued: 10/21/2014
• Est. Priority Date: 01/21/2011
• Status: Expired due to Fees

• Current Assignee: Peter Sui Lun Fong
• Original Assignee: Peter Sui Lun Fong
• Inventors: Fong, Peter Sui Lun
• Primary Examiner(s): EURICE, MICHAEL
• Application Number:
  US13/011,745
• Publication Number:
  US 20120188172A1
• Time in Patent Office: 1,369 Days
• Field of Search: 345/173, 345/174, 345/175, 345/176, 345/204, 345/82, 257/79, 257 81- 82, 257/84, 257/95, 257 99-100, 257/298, 257300-311, 257/316, 257/415, 257500-501, 257/503, 257/508, 257/660, 257/128, 257/175, 257/232, 257/235, 257/E31.105, 362/84, 362/249.05, 362/249.12, 36231102-31115, 362362-368, 362/394, 362/800, 438/69
• US Class Current: 345/82
• 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 light emitting diode switch device, comprising:

a first polarity lead;

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

a first polarity LED lead frame with the at least one electroluminescent semiconductor element mounted thereto with the first polarity contact thereof electrically connected to the first polarity lead;

a second polarity lead;

a second polarity LED lead frame electrically connected to the second polarity lead, the second polarity lead being electrically connected to the second polarity contact of the electroluminescent semiconductor element;

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, wherein the first touch sensor contact section and the first touch sensor lead frame section are each electrically connected to and structurally integral with the first touch sensor lead section, an entire structural contiguity of the first touch sensor structure independently detecting a capacitive touch input and independently correlated with an independent capacitive touch sensor controller input; and

a second touch sensor structure of a unitary construction defined by a second touch sensor lead section, a second touch sensor contact section and a second touch sensor lead frame section, wherein the second touch sensor contact section and the second touch sensor lead frame section are each electrically connected to and structurally integral with the second touch sensor lead section, an entire structural contiguity of the second touch sensor structure independently detecting a capacitive touch input and independently correlated with another independent capacitive touch sensor controller input;

an at least partially translucent case encapsulating the electroluminescent semiconductor element, the first polarity LED lead frame, the second polarity LED lead frame, the first touch sensor lead frame section, and the second touch sensor lead frame section;

wherein the entire structural contiguity of the first touch sensor lead frame section and the first touch sensor contact section is unexposed on an outer surface of the case, the first touch sensor contact section extends partially around a first subsection of an internal circumference of the at least partially translucent case and galvanic isolation being maintained while dielectric conduction is allowed;

wherein the entire structural contiguity of the second touch sensor lead frame section and the second touch sensor contact section is unexposed on an outer surface of the case, the second touch sensor contact section extends partially around a second subsection of the internal circumference of the at least partially translucent case and galvanic isolation being maintained while dielectric conduction is allowed.

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

3. The light emitting diode switch device of claim 1, wherein the first touch sensor lead frame section is disconnected from the electroluminescent semiconductor element.

4. The light emitting diode switch device of claim 1, wherein a first one of the electroluminescent semiconductor elements corresponds to a first visible spectrum wavelength emission and a second one of the electroluminescent semiconductor elements corresponds to a second visible spectrum wavelength emission different from the first visible spectrum wavelength emission.

5. The light emitting diode switch device 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.

6. The light emitting diode switch device 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.

7. The light emitting diode switch device of claim 1, wherein the second polarity lead is connected to a light emitting diode driver output, and the first touch sensor lead section is independently connected to the capacitive touch sensor controller input.

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; and

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

a first polarity lead;

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

a first polarity LED lead frame with the at least one electroluminescent semiconductor element mounted thereto with the first polarity contact thereof electrically connected to the first polarity lead;

a second polarity lead;

a second polarity LED lead frame electrically connected to the second polarity lead, the second polarity lead being electrically connected to the second polarity contact of the electroluminescent semiconductor element;

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, wherein the first touch sensor contact section and the first touch sensor lead frame section are each electrically connected to and structurally integral with the first touch sensor lead section, the first touch sensor contact section is electrically connected to and structurally integral with the first touch sensor lead frame section, an entire structural contiguity of the first touch sensor structure independently detecting a capacitive touch input and independently correlated with an independent capacitive touch sensor controller input; and

a second touch sensor structure of a unitary construction defined by a second touch sensor lead section, a second touch sensor contact section and a second touch sensor lead frame section, wherein the second touch sensor contact section and the second touch sensor lead frame section are each electrically connected to and structurally integral with the second touch sensor lead section, an entire structural contiguity of the second touch sensor structure independently detecting a capacitive touch input and independently correlated with an independent capacitive touch sensor controller input;

an at least partially translucent case encapsulating the electroluminescent semiconductor element, the first polarity LED lead frame, the second polarity LED lead frame, the first touch sensor lead frame section and the second touch sensor lead frame section;

wherein the entire structural contiguity of the first touch sensor lead frame section and the first touch sensor contact section is unexposed on an outer surface of the case, the first touch sensor contact section extends partially around a first subsection of an internal circumference of the at least partially translucent case and galvanic isolation being maintained while dielectric conduction is allowed;

wherein the entire structural contiguity of the second touch sensor lead frame section and the second touch sensor contact section is unexposed on an outer surface of the case, the second touch sensor contact section extends partially around a second subsection of the internal circumference of the at least partially translucent case and galvanic isolation being maintained while dielectric conduction is allowed;

wherein each of the first touch sensor structure and the second touch sensor structure independently and simultaneously detecting capacitive touch input without any cooperation with a respective other one of the first touch sensor structure and the second touch sensor structure, with a specific combination of the first-axis matrix coordinate position corresponding to the first touch sensor structure and the second-axis matrix coordinate position corresponding to the second touch sensor structure uniquely identifying a specific one of the light emitting diode switch devices in the array.

9. The combination input and output device of claim 8, wherein each of the light emitting diode switch device includes:

a first polarity LED lead frame with the first electroluminescent semiconductor element mounted thereto;

a plurality of second polarity LED lead frames, a one of a first subset of the plurality of second polarity LED lead frames being electrically connected to the one of the plurality of independent output lines of the light emitting diode driver integrated circuit; and

wherein the one of the first subset of the plurality of first polarity LED lead frames is electrically connected to the first electroluminescent semiconductor element.

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

a second electroluminescent semiconductor element mounted to the first polarity LED lead frame.

11. The combination input and output device of claim 8, wherein a touch input corresponds to a changing capacitance value of the first touch sensor lead as detected by the capacitive touch input controller integrated circuit.

12. 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.