WO2005091321A1 - Programmable dichromatic legend lighted switches - Google Patents
Programmable dichromatic legend lighted switches Download PDFInfo
- Publication number
- WO2005091321A1 WO2005091321A1 PCT/IB2005/000664 IB2005000664W WO2005091321A1 WO 2005091321 A1 WO2005091321 A1 WO 2005091321A1 IB 2005000664 W IB2005000664 W IB 2005000664W WO 2005091321 A1 WO2005091321 A1 WO 2005091321A1
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- WO
- WIPO (PCT)
- Prior art keywords
- light emitting
- emitting diodes
- color
- diodes
- illuminated
- Prior art date
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- 238000005286 illumination Methods 0.000 claims abstract description 51
- 239000003086 colorant Substances 0.000 claims abstract description 34
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 238000003618 dip coating Methods 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 230000003595 spectral effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 3
- 230000004297 night vision Effects 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/18—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
- H01H9/181—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks using a programmable display, e.g. LED or LCD
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/023—Light-emitting indicators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/023—Light-emitting indicators
- H01H2013/026—Light-emitting indicators with two or more independent lighting elements located inside the push button switch that illuminate separate zones of push buttons
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S362/00—Illumination
- Y10S362/80—Light emitting diode
Definitions
- the present invention is directed, in general, to voltage-controlled dimming illuminated displays and, more specifically, to programmable dichromatic displays illuminated by voltage-controlled dimming light emitting diodes .
- the illumination may be optically filtered to produce a wide range of human visible or night vision imaging system (NVIS) colors, including blue, green, yellow, red and white or the NVIS colors of NVIS blue, NVIS white, NVIS green A (blue-green) , NVIS green B (green) , NVIS yellow (yellow) and NVIS red (orange-red) .
- NVIS human visible or night vision imaging system
- multiple lamps are used within the same display to illuminate different regions of the display separately, providing, for example, four separate legends, each individually illuminated, on the same display for a single illuminated pushbutton switch, indicator or annunciator.
- the legend is typically illuminated to indicate a first condition or state, and non-illuminated to indicate a second condition or state. For instance, illumination of the legend indicates actuation of the switch to a "closed” state, while the hidden or non-illuminated legend indicates that the switch is in an "open” state.
- Color filters are often employed to adjust the spectral radiance of the illumination source (s) to meet the desired chromaticity coordinates and luminance levels at maximum rated voltage (s) . By combining multiple illumination sources and different color filters, displays can have multiple legends that each light in a different color.
- programmable dichromatic illumination for a single display region which in the present invention is achieved by utilizing an array of white light emitting diodes to produce illumination optically filtered by separate filters to produce the two or more desired output illumination colors at a desired luminance when the full rated voltage is applied to the light emitting diodes.
- Programmability of illumination color for a dedicated legend display area is achieved by controlling application of the driving voltage to one of two or more different groups of interleaving LEDs alternately illuminating the same display area.
- Each of the different LED groups illuminates the display area with a different color, produced by different color LEDs, filtering of individual LEDs within each group, or dip- coating the LEDs.
- Application of the driving voltage to different switch input pins causes the same legend region to be illuminated by different LED groups in different colors, reflecting different conditions.
- FIGURES 1A through IF depict a perspective assembled view, a perspective exploded view, and an exploded side view of a programmable dichromatic illuminated display pushbutton switch, together with front views of various components thereof, according to one embodiment of the present invention
- FIGURES 2A through 2C are schematic diagrams illustrating connection of interleaved half-display and/or quadrant groups of light emitting diodes within a programmable dichromatic illuminated display pushbutton switch according to one embodiment of the ' present invention
- FIGURE 3 is a circuit diagram for a voltage- controlled dimming light emitting diode driver employed within a programmable dichromatic illuminated display according to one embodiment of the present invention.
- FIGURES 1A-1F, 2A-2C and 3, discussed below, and the various embodiments used to describe the principles of the present invention in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the invention. Those skilled in the art will understand that the principles of the present invention may be implemented in any suitably arranged device.
- FIGURE 1A depicts a perspective, assembled view of a programmable dichromatic illuminated display pushbutton switch according to one embodiment of the present invention.
- FIGURE IB depicts a perspective, exploded view of a portion of the same programmable dichromatic illuminated display pushbutton switch
- FIGURE 1C depicts an exploded side view of the same programmable dichromatic illuminated display pushbutton switch.
- the programmable dichromatic illuminated display is implemented within an illuminated pushbutton switch in the exemplary embodiment, although skilled artisans will recognize that the present invention may be employed in conjunction with other types of illuminated displays, including but not limited to indicators and annunciators.
- the complete structure and operation of an illuminated pushbutton switch is not depicted or described herein. Instead, only so much of the structure and operation of a pushbutton switch as is unique to the present invention or necessary for an understanding of the present invention is depicted and described .
- Illuminated pushbutton switch 100 includes a switch housing 101 receiving a switch cap 109 having a display surface 110 on which illuminated legends are visible or hidden, and which is pressed to actuate the switch.
- Pushbutton switch cap housing 102 receives an array of light emitting diode (LED) or incandescent lamp light sources 104 within a lamp mount 103, which also contains the driver circuits for voltage-controlled dimming of the light sources 104, with input pin contacts 105 provided for making electrical connection to receive a voltage for driving the light sources 104 and common or ground contacts 111 for completing the driving circuit.
- LED light emitting diode
- incandescent lamp light sources 104 within a lamp mount 103, which also contains the driver circuits for voltage-controlled dimming of the light sources 104, with input pin contacts 105 provided for making electrical connection to receive a voltage for driving the light sources 104 and common or ground contacts 111 for completing the driving circuit.
- legend plate 106 in the exemplary embodiment may contain as many as four separate visible legends ("NAV”, “TAC”, “MLS” AND “GPS” in the example depicted) on the display surface 110, one in each of four quadrants.
- two legends, each in one half (divided horizontally or vertically) of the display surface 110, or three legends (one in one half and two each in one of the remaining two quadrants) are employed. In either case, at least one of the legends visible on the display surface 110 is programmably illuminated in different colors.
- the array 104 of light sources 104 is, in the exemplary embodiment, a 4X4 array of sixteen light emitting diodes.
- the light emitting diodes within at least two adjacent quadrants are driven as part of two interleaved groups, as described in further detail below.
- the light emitting diodes may optionally be driven as a single group, so that all light emitting diodes within that quadrant are either on or off.
- Each interleaved group of light emitting diodes for a display area half, or the light emitting diodes for a quadrant employs a separate voltage-controlled dimming driver circuit as described in further detail below.
- FIGURES 2A through 2C are schematic diagrams illustrating connection of interleaved half-display and/or quadrant groups of light emitting diodes within a programmable dichromatic illuminated display pushbutton switch according to one embodiment of the present invention.
- FIGURE 2A illustrates a single circuit configuration with one common--that is, the entire display area is either not illuminated, illuminated in a first color, or illuminated in a second color.
- the input pins labeled "A,” “B,” “C, “ and “D” each correspond to one of the contacts 105 depicted in FIGURE 1C, while the pin labeled "G" is the common or ground connection 111.
- the LEDs represented by circles, are connected and driven together by groups, with the letter assigned to a corresponding input pin used to designate the group to which each LED in the array belongs.
- all of the LEDs labeled "B" are driven by applying a voltage to input pin B, completing a circuit through common or ground connection G.
- the LEDs in each half are interleaved, with adjacent LEDs belonging to different groups.
- pairs of input pins e.g., A/B and C/D
- pairs of input pins are driven in tandem to illuminate the entire display area using the LEDs in both of two groups, one in the top half and one in the bottom.
- the display is illuminated in a first color or set of colors by applying an input voltage to input pins for one group in each half (e.g., A/B, A/C, or B/D) and illuminated in a second color or set of colors by applying the input voltage to the input pins for the remaining two groups .
- the illumination colors for the top and bottom halves may differ (e.g., green/red for the top half and white/amber for the bottom) .
- FIGURE 2B illustrates a split circuit with two commons configuration, in which illumination of the upper and lower halves of the display area may be separately controlled.
- the display area could alternatively be vertically divided by appropriately connecting and interleaving the LEDs) .
- Each half of the display area is either not illuminated, illuminated in a first color, or illuminated in a second color, each independently of the other half.
- the top half of the display is illuminated in a first color by applying an input voltage to either of input pins B or C, and in a second color by applying the input voltage to the other input pin, completing a circuit through common or ground connection G in both cases.
- bottom half of the display is illuminated in a first color by applying an input voltage to either of input pins A or D, and in a second color by applying the input voltage to the other input pin, completing a circuit through common or ground connection F in both instances.
- FIGURE 2C illustrates a split circuit with two commons configuration in which illumination for one half of the display area is controlled by individual quadrants.
- the top half of the display may be illuminated in one of two colors.
- the bottom left and bottom right quadrants may each be either not illuminated or illuminated in a single color (although the illumination color for the bottom left quadrant may differ from the color for the bottom right quadrant) .
- both quadrants may be separately controlled and illuminated concurrently or individually.
- each interleaved group or quadrant contains the same type of light emitting diode, having the same bandgap voltage (and voltage- luminance) characteristic.
- Light emitting diodes emitting a broad spectral radiance with a single bandgap are commercially available, and produce a narrow spectral radiance (typically blue) utilized to excite a broad spectral radiance fluorescence from a rare earth phosphor deposited within the light emitting diode package (i.e., "white” light emitting diodes) .
- the combined spectral radiances of the light emitting diode and the phosphor emissions produce the appearance of a high color temperature white light source, with broad spectral radiance capable of producing a wide variety of colors including red, yellow, blue, green and white.
- each light emitting diode within array 104 is such a white light emitting diode.
- filters 107 disposed between light emitting diode array 104 and the legend plate 106, comprised of acrylic, polycarbonate, or glass materials, or a combination thereof.
- Filters 107 are selected to produce a specific chromaticity, as well as a desired luminance at one or more specific voltages.
- white light emitting diodes 104 may be employed to produce all colors desired.
- the color of each filter piece is selected to achieve the desire illumination color when the LEDs of a given group are switched on.
- each filter piece disposed between an LED in group B and the legend plate 106 is the same color, as is each filter piece disposed between any LED in group A and the legend plate 106, any LED in group C and the legend plate 106, and any LED in group D and the legend plate 106.
- the colors for each of groups A-D may all be different .
- Optical filters 107 contain colorants, dyes and/or pigments known in the art which selectively remove white light emitting diode spectral radiance to match specific chromaticity requirements for illuminated pushbutton switch 100 (e.g., red, yellow, white, green or blue) .
- filters 107 may optionally also contain specialized dyes for absorption of non-visible red or near infra-red spectral emissions from the white light emitting diodes 104 for the purpose of producing night vision imaging system (NVIS) compatible red, yellow, blue, green or white colors.
- filters 107 may be formed of glass or plastic with suitable thin-film optical (interference) coatings to remove the red or near-infrared spectral emissions.
- white light emitting diodes 104 may be filtered to produce any lighted legend color, including the standard aircraft illumination colors of blue, green, yellow, red and white or the NVIS colors of NVIS blue, NVIS white, NVIS green A (blue-green) , NVIS green B (green) , NVIS yellow (yellow) and NVIS red (orange-red) .
- Filters 107 are also designed to control the output luminance emitting from the display surface 110 of pushbutton cap 109 so that colored lighting produced from the white light emitting diodes will have approximately the same luminance at a specific voltage, such as 200-500 foot-lamberts (sunlight readable) at the maximum or full rated operating voltage.
- FIGURE 3 is a circuit diagram for a voltage- controlled dimming light emitting diode driver employed within a programmable dichromatic display illuminated pushbutton switch according to one embodiment of the present invention.
- individual but identical driver circuits each implemented by circuit 300, are separately employed for each interleaved group or quadrant of the array 104--that is, one instance of the circuit 300 for the LEDs in group A, one instance for group B, etc.
- Circuit 300 includes four white light emitting diodes L1-L4 from one of the interleaved groups or quadrants A-D, series-connected in pairs L1/L2 and L3/L4 within two LED sub-groups 301a and 301b.
- a switching circuit 302 is connected between LED sub-groups 301a and 301b to switch LED groups 301a and 301b from series- connection between input and output ports 304a and 304b to parallel-connection, or vice-versa, as the input voltage applied across input and output ports 304a-304b is varied across a threshold or "kickover" value.
- Switching circuit 302 includes a switching diode Dl connected in series between LED groups 301a and 301b, a first resistor R3 connected in parallel with both LED group 301a and switching diode Dl, and a second resistor R4 connected in parallel with both LED group 301b and switching diode Dl.
- the cathode of switching diode Dl is connected to the anode of the last light emitting diode L2 (in the direction of the forward voltage drop across the LEDs) within LED group 301a and to one end of resistor R4 ; the anode of switching diode Dl is connected to the cathode of the first light emitting diode L3 with LED group 301b and to one end of resistor R3.
- An opposite end of resistor R3 is connected to the cathode of the first light emitting diode LI within LED group 301a, and an opposite end of resistor R4 is connected to the anode of the last light emitting diode L4 within LED group 301b.
- LED groups 301a and 301b (comprising light emitting diode pairs L1/L2 and L3/L4) are connected by switching circuit 302 either in series or in parallel between input and output ports 304a-304b, depending on the voltage applied across the input and output ports 304a-304b.
- Switching circuit 232 provides kickover from parallel-connection to series-connection, and vice-versa, of LED groups 301a-301b as the input voltage crosses a switching threshold.
- Switching diode Dl and resistors R3 and R4 enable the switching mechanism.
- circuit 300 operates in two modes: high luminance mode above the kickover point, where the applied input voltage across ports 304a-304b is greater than the combined forward voltage drops (turn-on voltages) of light emitting diodes L1-L4 and switching diode Dl; and low luminance mode below the kickover point, where the applied input voltage across ports 304a- 304b is less than the combined forward voltage drops of light emitting diodes L1-L4 and switching diode Dl (but greater than the combined forward voltage drops of either of light emitting diode pairs 11/L2 or L3/L4) .
- switching diode Dl conducts, and most of the current between ports 304a-304b passes through the series connected path of light emitting diode pair L1/L2, switching diode Dl, and light emitting diode L3/L4.
- the primary current path for high luminance control is established by the high luminance resistor R2.
- switching diode Dl stops conducting and the current passes through the two parallel paths comprising: light emitting diode pair L1/L2 and resistor R4 ; and resistor R3 and light emitting diode pair L3/L4.
- Low luminance mode therefore results when the applied input voltage is insufficient to allow forward current to flow through switching diode Dl .
- the primary current path for low luminance control is established by low luminance resistors R3-R4.
- Resistor Rl provides a quiescent current path to prevent false or unintentional illumination at low current levels, which otherwise may produce detectable illumination at levels of as low as a few microamperes ( ⁇ A) .
- Resistor Rl is located to allow the rise in current across the resistor with applied voltage to halt at the combined forward voltage drops of light emitting diodes L1-L4 and switching diode Dl, reducing unnecessary power dissipation at higher input voltages.
- Zener diodes Zl and Z2 in conjunction with high luminance resistor R2 , provide circuit protection against transients, conducted electromagnetic susceptibility, or an electrostatic discharge event.
- zener diodes Zl and Z2 also prevent failure of the entire quadrant should a single light emitting diode L1-L4 fail in an electrically open state, by providing an alternate current path to maintain quadrant circuit integrity with two light emitting diodes still illuminating under such a catastrophic failure condition.
- resistor R2 serves to limit the current of a transient or overvoltage event and also serves to limit the operating current to safe levels in order to prevent a catastrophic failure of the display circuitry.
- programmable dichromatic display 100 may be dimmed using voltage-controlled dimming circuit 300 while maintaining the desired luminance uniformity from sunlight readability to night flying luminance levels regardless of what illumination color is employed.
- Component values for voltage-controlled dimming circuit 300 are also independent of the output illumination color since only one bandgap and voltage-luminance characteristic need be considered. The component values may differ for interleaved groups and quadrant group.
- Uniform voltage-controlled dimming of multiple illumination colors utilizing a single control voltage is enabled for light emitting diode illumination sources in the present invention.
- Standardized luminance levels are achieved from light emitting diode illumination sources at approximately the same voltages at which the desired luminance is achieved under industry standards which have evolved with respect to incandescent lamps (e.g., sunlight readable luminance of at least 150-500 foot- lamberts at the full rated voltage of 28VDC, commercial night flying luminance of about 10-30 foot-lamberts at approximately 14 VDC, military night-flying luminance of about 1 foot-lambert at approximately 7.2 VDC, and NVIS- compatible luminance of about 0.1 foot-lamberts at approximately 6.55 VDC).
- incandescent lamps e.g., sunlight readable luminance of at least 150-500 foot- lamberts at the full rated voltage of 28VDC, commercial night flying luminance of about 10-30 foot-lamberts at approximately 14 VDC, military night-flying luminance of about 1 foot-lambert at approximately 7.2 VDC, and NVIS- compatible luminance of about 0.1 foot-lamberts at approximately 6.55 VDC
- FIGURE 3 also provides electrostatic discharge (ESD) protection for the light emitting diodes which is comparable to the inherent electrostatic discharge capabilities of incandescent lamps.
- ESD electrostatic discharge
- Electrical transients within aircraft circuitry frequently spikes up to 600 VDC, with up to a 24 ampere (A) peak current for 10 microseconds.
- incandescent lamps are essentially immune to those types of electrical transients encountered in aircraft circuitry, light emitting diodes are extremely susceptible to electrical transients, often failing when exposed to voltages of as low as 50 VDC.
- Circuit 300 provides electrical transient tolerance comparable to that exhibited by incandescent lamps while employing light emitting diodes instead.
- the four individual driver circuits for pushbutton switch 100 are preferably formed on a flex circuit in accordance with the known art, which may then be folded and fit within pushbutton cap 109.
- the four drivers on the flex circuit are separate, without interconnection.
- the input and output ports may be connected in either a common anode or common cathode configuration, with input port 304a for each circuit separately connected to one of input pins A, B, C or D, and output port 304b for all four circuits connected to one of common ground connections G or F (all four to G or two to G and two to F) , or vice versa.
- the filter elements within the pushbutton cap 109 may be selected to produce different illumination colors, so that adjacent legends are illuminated in different colors on legend plate 106 and at least half of the legend plate may be selectively illuminated in either of two colors. Since all of the light emitting diodes 104 are of the same type and have the same bandgap voltage characteristics and the same voltage-luminance characteristics, all illumination colors will dim uniformly when the control voltage (a single control voltage, independent of illumination color) applied to light emitting diodes 104 in each interleaved group or quadrant is decreased to reduce luminance.
- Filters 107 in the exemplary embodiment are held by filter mount 108, which has openings therethrough for each filter in the exemplary embodiment and essentially serves as a frame holding the sixteen filters (or fewer filters for different arrangements of legends on display surface 110) .
- the switch housing 101 will contain the pushbutton cap 109, including the pushbutton cap housing 102, the legend plate 106, filters 107, filter mount 108, and light emitting diode array 104, as well as the driver circuitry 300 for each interleaved group or quadrant.
- Pushbutton cap 109 is preferably designed and sized to fit within a switch housing for a pushbutton switch employing incandescent lamp illumination, and operable with control elements within such an incandescent lamp-illuminated switch housing. No components necessary for the present invention are required to be located outside the pushbutton cap 109 (within, for example, switch housing 101). In this manner, existing illuminated displays with incandescent illumination may be retrofitted by replacement only of the pushbutton cap containing incandescent lamps with pushbutton cap 109 according to the present invention. The existing switch body need not be replaced to properly receive pushbutton cap 109 or to operate the illumination source within pushbutton cap 109.
- each white light emitting diode within the array 104 is preferably a diffused top light emitting diode.
- Such diffused top white light emitting diodes are commercially available. Use of diffused top light emitting diodes improves both the viewing angle (the maximum angle from the perpendicular to the display surface 110 at which the illuminated legend is still visible) and the luminance uniformity across the illuminated legend. Reflectors (not shown) may also be provided within pushbutton cap 109 to further improve the viewing angle.
- a voltage-luminance characteristic for the switches illumination output from four LEDs may equal or at least approach the standards for sunlight readability, commercial and military night flying, and night vision imaging systems at the corresponding typical driving voltages (set according to incandescent bulbs) .
- the legend for the switch may be illuminated in different colors to indicate different states. Each of these different illumination states and colors may indicate a different condition. In this manner, different color illuminations may be programmed to indicated different states or conditions via a single dedicated legend.
- Different illumination colors may alternatively be achieved by using different color LEDs in each group, individually filtering LEDs for the different groups, or dip-coating the LEDs for the different groups.
- incandescent sources may be substituted for the LEDs.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05708750A EP1741115A1 (en) | 2004-03-15 | 2005-03-15 | Programmable dichromatic legend lighted switches |
AU2005224841A AU2005224841A1 (en) | 2004-03-15 | 2005-03-15 | Programmable dichromatic legend lighted switches |
CA002565158A CA2565158A1 (en) | 2004-03-15 | 2005-03-15 | Programmable dichromatic legend lighted switches |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US55326604P | 2004-03-15 | 2004-03-15 | |
US60/553,266 | 2004-03-15 |
Publications (1)
Publication Number | Publication Date |
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WO2005091321A1 true WO2005091321A1 (en) | 2005-09-29 |
Family
ID=34961690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2005/000664 WO2005091321A1 (en) | 2004-03-15 | 2005-03-15 | Programmable dichromatic legend lighted switches |
Country Status (5)
Country | Link |
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US (1) | US7453218B2 (en) |
EP (1) | EP1741115A1 (en) |
AU (1) | AU2005224841A1 (en) |
CA (1) | CA2565158A1 (en) |
WO (1) | WO2005091321A1 (en) |
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KR20080024323A (en) * | 2006-09-13 | 2008-03-18 | 삼성전자주식회사 | Liquid crystal display device and driving method of liquid crystal display device |
JP5476128B2 (en) * | 2007-02-22 | 2014-04-23 | クリー インコーポレイテッド | Illumination device, illumination method, optical filter, and light filtering method |
CN101688646B (en) * | 2007-06-14 | 2014-10-29 | 皇家飞利浦电子股份有限公司 | Led-based luminaire with adjustable beam shape |
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US20110134023A1 (en) * | 2009-12-03 | 2011-06-09 | Yu-Hsiung Feng | Liquid crystal display and dimming method and dimming device for backlight module |
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KR101881065B1 (en) * | 2011-12-21 | 2018-07-24 | 삼성전자주식회사 | Light source module and backlight unit |
JP2015187982A (en) * | 2014-03-13 | 2015-10-29 | 株式会社半導体エネルギー研究所 | Light-emitting element, light-emitting device, electronic apparatus, and lighting system |
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KR20210011411A (en) | 2018-05-18 | 2021-02-01 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Light-emitting elements, light-emitting devices, electronic devices, and lighting devices |
EP3837591A4 (en) | 2018-08-13 | 2022-04-20 | Applied Avionics, Inc. | Command interpreter or command parser based control architecture for aircraft control, interface units and/or illuminated pushbutton switches |
US11059418B2 (en) * | 2019-03-25 | 2021-07-13 | Goodrich Lighting Systems, Inc. | Multi-mode NVIS-compatible lighting system |
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EP0463285A1 (en) * | 1990-06-26 | 1992-01-02 | Nihon Kaiheiki Industrial Co., Ltd. | Push-button switch with liquid-crystal display |
DE10014221A1 (en) * | 2000-03-22 | 2001-10-04 | Bosch Gmbh Robert | Electrical equipment with illuminable operating devices, e.g. car radio, navigation system, mobile telephone etc. has illumination state of keys set based on assigned function |
US20030019733A1 (en) * | 2001-07-25 | 2003-01-30 | Teac Corporation | Switch device with indicator |
EP1523021A1 (en) * | 2003-10-06 | 2005-04-13 | Research In Motion Limited | Selective keyboard illumination |
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US3664248A (en) * | 1968-05-03 | 1972-05-23 | Technical Operations Inc | Optical processing of information including synthesis by complex amplitude addition of diffraction spectra |
US4131777A (en) * | 1977-02-18 | 1978-12-26 | Switchcraft, Inc. | Pushbutton electrical switches and pushbuttons therefor |
US6608332B2 (en) * | 1996-07-29 | 2003-08-19 | Nichia Kagaku Kogyo Kabushiki Kaisha | Light emitting device and display |
US20020113555A1 (en) * | 1997-08-26 | 2002-08-22 | Color Kinetics, Inc. | Lighting entertainment system |
US6016038A (en) * | 1997-08-26 | 2000-01-18 | Color Kinetics, Inc. | Multicolored LED lighting method and apparatus |
US6265984B1 (en) * | 1999-08-09 | 2001-07-24 | Carl Joseph Molinaroli | Light emitting diode display device |
US7053601B1 (en) * | 2001-10-26 | 2006-05-30 | E.O. Schweitzer Mfg. Co. | Microprocessor controlled fault indicator having high visibility LED fault indication |
US6876143B2 (en) * | 2002-11-19 | 2005-04-05 | John James Daniels | Organic light active devices and methods for fabricating the same |
US6726112B1 (en) * | 2003-03-07 | 2004-04-27 | Joseph Ho | Illuminating thermostat |
US7075423B2 (en) * | 2003-10-06 | 2006-07-11 | Joseph Edward Currie | Combination illuminating inverse function power indicator and a brake light |
-
2005
- 2005-03-15 WO PCT/IB2005/000664 patent/WO2005091321A1/en not_active Application Discontinuation
- 2005-03-15 EP EP05708750A patent/EP1741115A1/en not_active Withdrawn
- 2005-03-15 AU AU2005224841A patent/AU2005224841A1/en not_active Abandoned
- 2005-03-15 CA CA002565158A patent/CA2565158A1/en not_active Abandoned
- 2005-03-15 US US11/081,004 patent/US7453218B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0463285A1 (en) * | 1990-06-26 | 1992-01-02 | Nihon Kaiheiki Industrial Co., Ltd. | Push-button switch with liquid-crystal display |
DE10014221A1 (en) * | 2000-03-22 | 2001-10-04 | Bosch Gmbh Robert | Electrical equipment with illuminable operating devices, e.g. car radio, navigation system, mobile telephone etc. has illumination state of keys set based on assigned function |
US20030019733A1 (en) * | 2001-07-25 | 2003-01-30 | Teac Corporation | Switch device with indicator |
EP1523021A1 (en) * | 2003-10-06 | 2005-04-13 | Research In Motion Limited | Selective keyboard illumination |
Also Published As
Publication number | Publication date |
---|---|
EP1741115A1 (en) | 2007-01-10 |
US20050231946A1 (en) | 2005-10-20 |
AU2005224841A1 (en) | 2005-09-29 |
CA2565158A1 (en) | 2005-09-29 |
US7453218B2 (en) | 2008-11-18 |
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