Classifications

• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
  • G06F1/16—Constructional details or arrangements
  • G06F1/1613—Constructional details or arrangements for portable computers
  • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
  • G06F1/1662—Details related to the integrated keyboard
• • 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
  • H01H13/04—Cases; Covers
  • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
• • G—PHYSICS
  • G06—COMPUTING OR CALCULATING; COUNTING
  • G06F—ELECTRIC DIGITAL DATA PROCESSING
  • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
  • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
  • G06F3/02—Input arrangements using manually operated switches, e.g. using keyboards or dials
  • G06F3/0202—Constructional details or processes of manufacture of the input device
• • 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
  • H01H13/04—Cases; Covers
• • 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
  • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
• • 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
  • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
  • H01H13/7006—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard comprising a separate movable contact element for each switch site, all other elements being integrated in layers
• • 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
  • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
  • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
  • H01H13/79—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the form of the contacts, e.g. interspersed fingers or helical networks
• • 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
  • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
  • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
  • H01H13/80—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the manner of cooperation of the contacts, e.g. with both contacts movable or with bounceless contacts
• • 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
  • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
  • H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
  • H01H13/803—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the switching function thereof, e.g. normally closed contacts or consecutive operation of contacts
• • 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
  • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
  • H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
• • 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
  • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
  • H01H13/86—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the casing, e.g. sealed casings or casings reducible in size
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H3/00—Mechanisms for operating contacts
  • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
  • H01H3/12—Push-buttons
  • H01H3/122—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor
  • H01H3/125—Push-buttons with enlarged actuating area, e.g. of the elongated bar-type; Stabilising means therefor using a scissor mechanism as stabiliser
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
  • H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
  • H10H20/80—Constructional details
  • H10H20/85—Packages
  • H10H20/851—Wavelength conversion means
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2203/00—Form of contacts
  • H01H2203/004—Rivet
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2203/00—Form of contacts
  • H01H2203/036—Form of contacts to solve particular problems
  • H01H2203/038—Form of contacts to solve particular problems to be bridged by a dome shaped contact
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2203/00—Form of contacts
  • H01H2203/056—Cuts or depressions in support, e.g. to isolate contacts
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2205/00—Movable contacts
  • H01H2205/016—Separate bridge contact
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2205/00—Movable contacts
  • H01H2205/016—Separate bridge contact
  • H01H2205/024—Means to facilitate positioning
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2207/00—Connections
  • H01H2207/04—Details of printed conductors
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2211/00—Spacers
  • H01H2211/026—Spacers without separate element
  • H01H2211/028—Contacts in depressions of layers
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2213/00—Venting
  • H01H2213/01—Venting with internal pressure of other switch sites
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2213/00—Venting
  • H01H2213/016—Venting in adhesive layer
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2215/00—Tactile feedback
  • H01H2215/034—Separate snap action
  • H01H2215/038—Resilient conductive tracks
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2219/00—Legends
  • H01H2219/036—Light emitting elements
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2219/00—Legends
  • H01H2219/036—Light emitting elements
  • H01H2219/052—Phosphorescence
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2219/00—Legends
  • H01H2219/054—Optical elements
  • H01H2219/06—Reflector
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2219/00—Legends
  • H01H2219/054—Optical elements
  • H01H2219/062—Light conductor
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2221/00—Actuators
  • H01H2221/076—Protruding in cavity covered by membrane
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2227/00—Dimensions; Characteristics
  • H01H2227/026—Separate dome contact
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2229/00—Manufacturing
  • H01H2229/044—Injection moulding
  • H01H2229/046—Multi-colour or double shot injection moulding
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H2239/00—Miscellaneous
  • H01H2239/004—High frequency adaptation or shielding

Definitions

• the disclosure relates generally to a keyboard assembly for an electronic device and, more particularly, to a light-emitting assembly positioned within a switch housing of a keyboard assembly for an electronic device.
• Electronic devices typically include one or more input devices such as keyboards, touch pads, mice, touch screens, and the like to enable a user to interact with the device. These devices can be integrated into an electronic device or can stand alone. An input device can transmit signals to another device via a wired or wireless connection. For example, a keyboard can be integrated into the casing (e.g., housing) of a laptop computer. Touch pads and other input devices may likewise be integrated into associated electronic devices.
• input devices such as keyboards, touch pads, mice, touch screens, and the like to enable a user to interact with the device.
• These devices can be integrated into an electronic device or can stand alone.
• An input device can transmit signals to another device via a wired or wireless connection.
• a keyboard can be integrated into the casing (e.g., housing) of a laptop computer.
• Touch pads and other input devices may likewise be integrated into associated electronic devices.
• keyboards typically illuminate a perimeter and/or a glyph located on each keycap of the keyboard to aid in the visibility of the keyboard in low-light settings.
• conventional keyboards often include a variety of components including a group of lights, typically positioned on one or more light strips, a light guide panel for directing the light, and/or a reflective surface for redirecting stray light and enhancing the illumination of the lights.
• the variety of components may require additional space within the enclosure housing the keyboard, which may be counter to a desire to decrease the size of the keyboard.
• the light strip may be a fraction of the size of the entire keyboard and may include fewer lights than the total number of keycaps in the keyboard. As a result, the light strip may unevenly illuminate the keyboard.
• an undesirable amount of heat may be generated within the keyboard and/or electronic device.
• a light-emitting assembly for a keyboard assembly comprises a phosphor structure, a transparent material positioned on opposing side surfaces of the phosphor structure, and an epoxy layer positioned over an entire back surface of the phosphor structure and the transparent material.
• the light- emitting assembly also comprises a mask layer positioned over an entire top surface of: the phosphor structure, the transparent material, and the epoxy layer.
• the light-emitting assembly further comprises a light source positioned within the phosphor structure for emitting a light.
• a keyboard assembly may comprise a switch housing formed from a substantially transparent material.
• the switch housing comprises a switch opening and a light source recess positioned adjacent the switch opening.
• the keyboard assembly also comprises a keycap positioned above the switch housing and a light-emitting assembly positioned within the light source recess of the switch housing. Additionally, the light-emitting assembly comprises a phosphor structure, a transparent material positioned on opposing side surfaces of the phosphor structure, a mask layer positioned over an entire top surface of the phosphor structure, and the transparent material. The light-emitting assembly also comprises a light source positioned within the phosphor structure for emitting a light through the switch housing. [0008] Embodiments may take the form of a keyboard assembly comprising a keycap, a light source operably connected to the keycap and configured to illuminate the keycap, and a light source housing at least partially surrounding the light source.
• the light source housing is operative to block light from emanating out of the light source housing in a first direction and a second direction.
• the light source housing is also operative to pass light emanating in a third direction opposite the first direction, and the second direction is toward the keycap, as measured from the light source.
• FIG. 1 shows an electronic device including a low-travel keyboard assembly, according to embodiments.
• FIG. 2 shows a light-emitting assembly of a low-travel keyboard assembly, according to embodiments.
• FIG. 3 shows a cross-sectional front view of the LED assembly taken along line 3-
• FIG. 4 shows a cross-sectional side view of the LED assembly taken along line 4-
• FIG. 5 shows an exploded view of a single key of the low-travel keyboard assembly of FIG. 2, according to embodiments.
• FIG. 6 shows a cross-section view of a low-travel keyboard assembly including a switch housing taken along line CS-CS in FIG. 5, according to embodiments.
• FIG. 7 shows a top view of a switch housing of a low-travel keyboard assembly including light-emitting assembly of FIGs. 2-4, according to embodiments.
• FIG. 8 is a flowchart illustrating a sample method of illuminating an input surface.
• the following disclosure relates generally to a keyboard assembly for an electronic device and, more particularly, to a light-emitting structure positioned within a switch housing of a keyboard assembly for an electronic device.
• the light-emitting structure may be a light- emitting assembly formed from a number of different elements.
• the light-emitting assembly may be formed from a light source positioned within a phosphor structure adjacent, touching, or at least partially surrounded by various layers or materials, including: sidewalls (which may be formed from a transparent material or opaque material); epoxy (which may form a sidewall and may be either opaque or transparent); a mask layer; and/or a heat dissipation layer.
• the light- emitting assembly generates and/or transmits light in certain directions, such as through one or more of the phosphor structure and layers.
• the various layers may restrict light to traveling through only three sides of the assembly, in certain embodiments.
• Light exiting the light-emitting assembly generally has a common wavelength and thus common color. Where the wavelengths and colors of light traveling through all light- transmissible sides of the assembly are equal, that light may illuminate an input surface such as a keycap. Accordingly, the keycap is substantially uniformly illuminated and has reduced or no dim spots and/or color shifts. Additionally, because of the configuration of the various layers and materials forming the light-emitting assembly, the light-emitting assembly may be a parallelepiped and compact, thereby reducing the space occupied within the keyboard assembly. Finally, where each key of the keyboard assembly includes an individual light- emitting assembly, keys and/or keycaps may be illuminated individually or selectively.
• FIG. 1 shows an electronic device 100 including a low-travel keyboard assembly 200 that may incorporate a light-emitting assembly for illuminating keyboard assembly 200, as described in more detail below with respect to FIGs. 2-4.
• electronic device 100 may be a laptop computer.
• electronic device 100 may be configured as any suitable electronic device that may utilize low-travel keyboard assembly 200.
• Other embodiments can implement electronic device 100 differently, such as, for example, a desktop computer, a tablet computing device, a telephone, a gaming device, a display, a digital music player, a wearable computing device or display, a health monitoring device, and so on.
• Electronic device 100 may include a top case 102.
• Top case 102 may take the form of an exterior, protective casing or shell for electronic device 100 and the various internal components (for example, low-travel keyboard assembly 200) of electronic device 100.
• Top case 102 may be formed as a single, integral component, or may have a group of distinct components that may be configured to be coupled to one another, as discussed herein. Additionally, top case 102 may be formed from any suitable material(s) that provides a protective casing or shell for electronic device 100 and the various components included in electronic device 100.
• top case 102 may be made from metal, a ceramic, a rigid plastic or another polymer, a fiber-matrix composite, and so on.
• Low-travel keyboard assembly 200 may be included within electronic device 100 to allow a user to interact with electronic device 100. As shown in FIG. 1 , low-travel keyboard assembly 200 is positioned within and/or may be received by top case 102 of electronic device 100. Low-travel keyboard assembly 200 may include a set of keycaps 300 positioned within and partially protruding through and/or surrounded by top case 102 of electronic device 100. As discussed herein, keycaps 300 are depressed and displaced to at least partially collapse a dome switch of low-travel keyboard assembly 200, which in turn forms an electrical signal or input to electronic device 100.
• keycap 300 of low-travel keyboard assembly 200 can be illuminated by a light-emitting assembly.
• the light-emitting assembly of low-travel keyboard assembly 200 is positioned in a switch housing surrounding a dome switch, where the switch housing and dome switch are positioned below keycap 300. That is, each individual keycap 300 includes an individual switch housing, which includes an individual light-emitting assembly positioned therein. As a result, a single light-emitting assembly illuminates each corresponding keycap 300. This can improve brightness and light uniformity for each keycap, and between keycaps.
• each keycap 300 is illuminated by a single, corresponding light-emitting assembly
• keycaps 300 of keyboard assembly 200 can be illuminated individually or selectively.
• other illumination schemes may be used.
• adjacent of keys can be lit by a single light-emitting assembly (e.g., one light- emitting assembly for each group of keys).
• a row or column of keys may be illuminated by a single light-emitting assembly.
• light source assemblies may be located at different points under a keyboard so that a relatively small number of assemblies may illuminate an entire keyboard (or all keycaps of the keyboard).
• light source assemblies may be located within or outside of switch housings, under keycaps, or under portions of the casing. Further, light source assemblies described herein may be used with other input devices, including mice, track pads, buttons, switches, touch-sensitive and/or force-sensitive surfaces, and so on. [0028]
• the light source assemblies of low-travel keyboard assembly 200 are formed from a light source positioned within a phosphor structure surrounded by various layers or materials that may include one or more transparent materials, one or more epoxy layers and one or more mask layers. The various layers to allow light to be emitted from only three sides of the assembly. Further, the emitted light has identical wavelengths and color.
• keycap 300 of low-travel keyboard assembly 200 is illuminated by the light-emitting assembly with a consistent visible light color and does not have discrepancies in illuminating light color or intensity.
• the light-emitting assembly can be a parallelepiped.
• the parallelepiped shape of the light-emitting assembly of low-travel keyboard assembly may reduce the overall size of light-emitting assembly and/or makes light-emitting assembly substantially compact. With a reduced size, the required amount of space occupied by light-emitting assembly within keyboard assembly 200 may also be reduced.
• low-travel keyboard assembly 200 may be positioned within and/or may be received by electronic device 100.
• low-travel keyboard assembly 200 may be a distinct, standalone component and may be in electronic communication, whether wired or wireless, with electronic device 100.
• Low-travel keyboard assembly 200 may be configured to allow a user to interact with electronic device 100.
• FIG. 2 shows a light-emitting assembly 201 of low-travel keyboard assembly 200 (see, FIGs. 1 and 5-7).
• Light-emitting assembly 201 may emit a light that travels from the assembly, into a switch housing, and is redirected by the switch housing to illuminate keycap 300.
• light-emitting assembly 201 may be configured to fit in light source recess 404 and provide light to keycap 300, including during operation of low-travel keyboard assembly 200.
• Light-emitting assembly may have a phosphor structure 202 and transparent material 204 positioned on opposing sides surfaces of phosphor structure 202.
• the transparent material may be positioned on or otherwise abutting the phosphor material, either wholly or partially.
• the phosphor structure may be a phosphor- doped material and may overlay a light source 220.
• the phosphor structure may alter a wavelength of a light emitted by the light source, thereby altering its color.
• the phosphor structure may luminesce (e.g., emit light) when the light source is active.
• the phosphor structure may be a luminescent structure.
• phosphor structure 202 and transparent material 204 may allow light from a light source of light-emitting assembly 201 to be emitted through the respective portions.
• the transparent material 204 may permit light to travel therethrough. Any suitable material may be used as the transparent material, including various plastics, polymers, ceramics, glasses, and so on.
• Light source 220 of light-emitting assembly 201 may be positioned within phosphor structure 202. As shown in the cross-sectional views of FIGs. 3 and 4, light source 220 may be positioned substantially in the center of, and substantially encompassed within, phosphor structure 202 of light-emitting assembly 201 . Light source 220 may emit a light through phosphor structure 202 and transparent material 204 and, ultimately, through switch housing 400 of low-travel keyboard assembly 200, as discussed herein with respect to FIGs. 5-7. In some embodiments, the light source 220 may be off-center with respect to the phosphor structure 202 and/or light-emitting assembly 201 .
• the light source 220 may be a light-emitting diode, an organic light- emitting diode, a quantum dot, a cold cathode fluorescent lamp, and so on. Further, the light source may emit multiple colors of light in some embodiments. As an example, the light source may be a multicolor LED and the color emitted by the LED may change based on a user input, operating state, software or firmware command, and so on. Some embodiments may also employ multiple light sources 220 in a single light-emitting assembly 201 .
• Light-emitting assembly 201 may also have an epoxy layer 210 placed over an entire back surface 212 of phosphor structure 202 and transparent material 204.
• epoxy layer 210 may be substantially larger in one or more dimension than phosphor structure 202 and transparent material 204, although this may vary between embodiments. More specifically, as shown in FIG. 2, epoxy layer 210 may be substantially wider than phosphor structure 202 and transparent material 204 an example of this is shown in FIG. 4. [0037] Returning to FIG. 2, epoxy layer 210 may be adjacent or abutting back surface 212 of phosphor structure 202 and transparent material 204, which may substantially waterproof light-emitting assembly 201 and its components.
• epoxy layer 210 may be substantially transparent to allow light from light source 220 to pass through epoxy layer 210.
• epoxy layer 210 may be opaque epoxy and prevent light from passing through epoxy layer 210.
• the transparent material 204 may be formed on the phosphor structure; likewise in some embodiments the epoxy may be directly formed on the back surface (e.g., rear). In other embodiments, the transparent material and/or epoxy layer may be deposited or layered, rather than formed, on their corresponding surfaces.
• Light-emitting assembly 201 may also incorporate a mask layer 218.
• Mask layer 218 may be positioned over phosphor structure 202, transparent material 204 and/or epoxy layer 210 of light-emitting assembly 201 .
• phosphor structure 202, transparent material 204 and epoxy layer 210 of light-emitting assembly 201 may have top surfaces that may be in planar alignment and may be substantially covered by mask layer 218.
• Mask layer 218 may be formed from an opaque material to prevent light of light source 220 from being emitted through mask layer 218.
• FIGs. 3 and 4 show cross-section views of LED assembly 201 .
• FIG. 3 shows a cross-sectional front view of LED assembly 201 taken along line 3-3 in FIG. 2
• FIG. 4 shows a cross-sectional side view of LED assembly 201 taken along line 4-4 in FIG. 2.
• light source 220 may have one or more electrical leads 222 electrically coupled to light source 220 and a substrate 228, such as a printed circuit board (PCB) 500 of low travel keyboard assembly 200 (see, FIGs. 5-7), to provide power to light source 220.
• PCB printed circuit board
• the electrical leads 222 electrically couple light source 220 to substrate 228, such that substrate 228 may provide power to light source 220, as discussed herein.
• the electrical leads 222 may be positioned in phosphor structure 202 and may extend toward back surface 212 of phosphor structure 202. Portions of the leads 222 of light source 220 may also extend through or be positioned within epoxy layer 210, so that epoxy layer 210 seals (e.g., waterproofs) the electrical leads 222 and, ultimately, light source 220, to prevent light source 220 from undesirably shorting due to moisture exposure.
• epoxy layer 210 seals (e.g., waterproofs) the electrical leads 222 and, ultimately, light source 220, to prevent light source 220 from undesirably shorting due to moisture exposure.
• Light-emitting assembly 201 may also have a heat dissipation layer 226 over mask layer 218.
• Heat dissipation layer 226 may be formed from a heat resistant material that may dissipate the heat generated by light source 220 and the light generated by light source 220. As light is emitted from light source 220, light may contact mask layer 218, but may not be emitted through opaque mask layer 218. However, the light and light source 220 may generate heat on or in mask layer 218.
• Heat dissipation layer 226 may be positioned on mask layer 218 to dissipate the heat exposed to mask layer 218, which in turn reduce or prevent chemical and/or physical changes to mask layer 218.
• the mask layer and heat dissipation layer may be the same layer, or formed from the same material.
• a thermally conductive mask layer may be used.
• the transparent material(s) 204, mask layer 218, heat dissipation layer 226, and/or epoxy layer 210 may be affixed to the phosphor structure 202. This may be accomplished by any or all of an additional element such as an adhesive or fastener, an inherent property of one or more parts of the light-emitting assembly 201 , or the method of manufacture for the assembly. It should be appreciated that the various parts of the light-transmitting assembly 201 need not be affixed to one another. For example, they may be affixed to substrate 228 such as a printed circuit board 500 or to a switch housing 400 (see, FIGs. 5 and 6) instead.
• FIGs. 2-4 show light rays, labeled L 1-3 , emanating from light source 220. These rays are examples and are not intended to illustrate any limiting angle for emitted light.
• the light source 220 may emit light at any angle and direction, including out-of-plane with the illustrated light rays.
• the light source may emit light in a hemispherical pattern, near-spherical pattern, conic pattern, and so on. Accordingly, the light rays are intended to show overall, sample directions of emitted light and particularly how light may pass through certain surfaces of the light-emitting assembly 201 .
• light may be emitted through three sides of light-emitting assembly 201 .
• light (L ⁇ may be emitted through a front face of light-emitting assembly 201 including phosphor structure 202.
• light (L 2 ) may be emitted through a first sidewall 230 defined by transparent material 204.
• light (L 3 ) may be emitted through a second sidewall 232 of light- emitting assembly 201 including transparent material 204.
• the second side surface 232 may be opposite first side surface 230.
• the first and second side surfaces may be sidewalls.
• Light (L ⁇ emitted through the front face of light-emitting assembly 201 may have a wavelength substantially equal to a wavelength of light (L 2 ) emitted through first transparent sidewall 230 and a wavelength of light (L 3 ) emitted through second transparent sidewall 232.
• the wavelengths of light (L 1 -3 ) being equal, the visible light color of the light (L ⁇ 3 ) may also be identical or substantially the same.
• the visible light color of the light (Li) emitted through the front face of light-emitting assembly 201 may be substantially identical to a visible light color of light (L 2 ) emitted through first transparent sidewall 230 and a visible light color of light (L 3 ) emitted through second transparent sidewall 232.
• light-emitting assembly 201 may be a parallelepiped, or substantially a parallelepiped. Further, phosphor structure 202 and transparent material 204 positioned on opposite sides of surfaces of phosphor structure 202 may be substantially parallelepiped-shaped. Other embodiments may employ light-emitting assemblies 201 of any suitable shape and/or size, including irregular shapes. Likewise, a shape of the phosphor structure 202 need not match a shape of the overall assembly.
• light-emitting assembly 201 may require less space in low-travel keyboard assembly 200, as discussed herein with respect to FIGs. 5-7.
• the aforementioned transparent material may form one or more transparent sidewalls of the light-emitting assembly.
• opposing sidewalls may be formed from the transparent material.
• a rear or back surface of the light-emitting assembly may be formed from epoxy or another suitable material, and may be opaque.
• a front face of the light-emitting assembly 201 may be formed by a front surface of the phosphor structure.
• a mask layer may overlay the phosphor structure and upper surfaces of the sidewalls, thereby defining a top of the assembly. As also shown in FIG.
• the phosphor structure may abut the sidewalls and the opaque material forming the rear, although other embodiments may include spaces between any or all of the foregoing. Further and as shown in FIGs. 2-4, the phosphor structure may fill an interior of the light-emitting assembly, as defined by the sidewalls, rear, and mask layer.
• the wavelength and, ultimately, the visible light color of the light emitted by light source 220 may be substantially identical on all sides of light-emitting assembly 201 . That is, the greater the thickness of phosphor structure 202 in which light from light source 220 must travel through, the more the wavelength of the light will change. However, a wavelength of light from light-emitting assembly 201 may be tuned by adding or removing more transparent material 204.
• FIGs. 5 and 6 show a sample key structure of low-travel keyboard assembly 200 that utilizes light-emitting assembly 201 (see, FIG. 6), according to non-limiting examples.
• FIG. 5 shows a detailed exploded view of a portion of top case 102 of electronic device 100 and a single key structure 502 that utilizes light-emitting assembly 201 , as discussed herein.
• FIG. 6 shows a cross-section view of the single key assembly 502, taken along line CS-CS of FIG. 5. It is understood that similarly named components or similarly numbered components may function in a substantially similar fashion, may include similar materials and/or may include similar interactions with other components. Redundant explanation of these components has been omitted for clarity.
• top case 102 of electronic device 100 may include one or more keyholes 104 formed therethrough.
• Top case 102 may also include ribs or other supports 106 between or about the keycaps 300, and may substantially surround and/or may be positioned within the space between the keycaps 300 of low-travel keyboard assembly 200.
• Low-travel keyboard assembly 200 may be made from a number of layers or components positioned adjacent to and/or coupled to one another.
• the components positioned in layers may be positioned adjacent to and/or coupled to one another, and may be sandwiched between top case 102 and a bottom case (not shown) of electronic device 100.
• the keycaps 300 of low-travel keyboard assembly 200 may be positioned at least partially within keyholes 104 of top case 102.
• Each of the keycaps 300 may include a glyph 302 positioned on a top or exposed surface of the keycap 300.
• Each glyph 302 of keycap 300 may be substantially transparent to allow a light to be emitted through and/or illuminate keycap 300.
• keycap 300 may be substantially opaque, except for glyph 302, which may be transparent to allow light to be emitted through keycap 300.
• the perimeter of keycap 300 may be substantially illuminated by light emitted between the space between keycap 300 and skeletal ribs 106 of top case 102.
• keycap 300 of low-travel keyboard assembly 200 may include retaining members 304, 306 positioned on keycap 300. More specifically, keycap 300 may include at least one first retaining member 304 positioned on first side 308 and at least one second retaining member 306 positioned on a second side 310 of keycap 300, opposite first side 308. Retaining members 304, 306 may be formed, positioned, or retained on an underside 312 of keycap 300 adjacent a switch housing 400 of low-travel keyboard assembly 200. The retaining members 304, 306 may be utilized to couple keycap 300 within low-travel keyboard assembly 200 and, specifically, to couple keycap 300 to a hinge mechanism 322 coupled to PCB 500. Hinge mechanism 322, as shown in FIG.
• Hinge mechanism 322 may be coupled to and/or positioned within recess a 502 formed in PCB 500 of low-travel keyboard assembly 200.
• the keycaps 300 may be positioned above corresponding switch housings 400 of low-travel keyboard assembly 200, and may interact with a corresponding switch housing 400.
• Each switch housing 400 of low-travel keyboard assembly 200 may include a switch opening 402 extending completely through switch housing 400, and a light source recess 404 formed within each switch housing 400.
• Some switch housings 400 may define multiple light source recesses 404, each of which may house its own light-emitting assembly 201 or multiple assemblies. Further, the light source recess 404 may be sized such that one or more of its interior walls engage the exterior of the light-emitting assembly 201 , or gaps may exist between the interior walls of the light source recess and any or all parts of the light- emitting assembly's exterior.
• switch opening 402 may receive and/or house dome switch 406, which may be collapsed in response to keycap 300 translating.
• the dome switch collapses (or partially collapse) to generate an electrical connection acting as a signal to electronic device 100 (see, FIG. 1 ).
• light source recess 404 of switch housing 400 may receive light-emitting assembly 201 , which may emit a light through switch housing 400 to provide a light around the perimeter of keycap 300 and/or through transparent glyph 302 (see, FIG. 5) of keycap 300.
• light-emitting assembly 201 may emit light directly toward recess 502 to aid in illuminating the perimeter of keycap 300.
• switch opening 402 may receive or house different types of switches.
• switch housing 400 may include a body portion 410 and a top panel 412 formed integrally and molded to body portion 410.
• Body portion 410 of switch housing 400 may include switch opening 402 and light source recess 404 adjacent switch opening 402.
• Body portion 410 may be directly coupled to PCB 500, as shown in FIG. 6.
• Body portion 410 and top panel 412 of switch housing 400 may be formed from distinct materials. That is, body portion 410 may be formed from a first material having substantially rigid properties for supporting keycap 300 during operation of low-travel keyboard assembly 200 and/or protecting the various components (e.g., dome switch 406, light-emitting assembly 201 ) included within switch housing 400.
• the first material forming body portion 410 of switch housing 400 may also be transparent and/or reflective to direct light out of the switch housing and toward the keycap 300.
• light source 220 of light-emitting assembly 201 may emit light through transparent switch housing 400, and switch housing 400 may substantially reflect and/or allow light to be transmitted through the transparent material of switch housing 400 to illuminate glyph 302 on keycap 300 and/or the perimeter of keycap 300.
• the top panel 412 may act as a light guide to direct light emitted from light- emitting assembly 201 to keycap 300.
• the top panel 412 may include structures configured to focus light on specific areas of the keycap or about the keycap, as well as reflective structures configured to direct light toward the keycap. For example, lenses, apertures, and the like may emit light from the top panel, while an upper surface of the top panel may reflect light incident on the panel.
• Top panel 412 of switch housing 400 may be formed integrally with body portion 410. As one example, as shown in FIG. 6, top panel 412 may be overmolded on body portion 410 and may cover switch opening 402 of body portion 410. In a non-limiting example, top panel 412 may be formed integrally with body portion 410 using a double-shot housing formation process. Top panel 412 may be formed from a second material, distinct from the first material forming body portion 410, and may be substantially
• top panel 412 may substantially flex and protect dome switch 406 when keycap 300 is depressed.
• the second material forming top panel 412 may have substantially transparent properties that allow light to pass through top panel 412 to keycap 300 and/or substantially reflective properties to redirect light toward keycap 300.
• Top panel 412 may be positioned over switch opening 402 not only to redirect light toward keycap 300 but also to substantially protect dome switch 406 from wear. That is, when a force is applied to keycap 300 to depress keycap 300, keycap 300 may contact top panel 412 of switch housing 400, which may subsequently deform and collapse dome switch 406 to form an electrical connection. By acting as a barrier between keycap 300 and dome switch 406, top panel 412 may reduce the wear on dome switch 406 over the operational life of low-travel keyboard assembly 200.
• Top panel 412 may also include a first contact protrusion 418 positioned on a first surface 420 of the top panel 412.
• First contact protrusion 418 may be positioned directly adjacent a second contact protrusion 340 on underside 312 of keycap 300.
• the first contact protrusion 418 of top panel 412 and the second contact protrusion 340 of keycap 300 may contact one another when keycap 300 is depressed and may more evenly distribute the force applied to top panel 412 and, subsequently, dome switch 406 when keycap 300 is depressed. By distributing the force through top panel 412, the wear on dome switch 406 may be further reduced over the operational life of low-travel keyboard assembly 200.
• Switch housing 400 may also include a roof portion 426 over light source recess 404. More specifically, body portion 410 of switch housing 400 may include a roof portion 426 positioned over light source recess 404 and light-emitting assembly positioned within light source recess 404. As shown in FIG. 6, roof portion 426 of switch housing 400 may be formed integrally with switch housing 400 and, specifically, body portion 410 of switch housing 400. However, it is understood that roof portion 426 of switch housing 400 may be formed from a distinct component or material that may be coupled to body portion 410 of switch housing 400. Roof portion 426 of switch housing 400 may be substantially opaque to prevent the light of light-emitting assembly 201 from being emitted through roof portion 426.
• substantially opaque roof portion 426 may work in conjunction with mask layer 218 of light-emitting assembly 201 , as discussed herein with respect to FIG. 4, to prevent light from passing directly toward keycap 300 and/or through roof portion 426 of switch housing 400.
• Low-travel keyboard assembly 200 may also include a printed circuit board (PCB) 500 positioned below the group of switch housings 400.
• PCB 500 may be similar to substrate 228 discussed herein with respect to FIGs. 2-4.
• switch housings 400 may be coupled to PCB 500 of low-travel keyboard assembly 200.
• PCB 500 may include a number of recesses 502 within PCB 500, where each recess 502 of PCB 500 may receive a corresponding switch housing 400 of low-travel keyboard assembly 200.
• Each switch housing 400 may be positioned completely within, and coupled to the surface of, recess 502 of PCB 500.
• PCB 500 may provide a rigid support structure for switch housing 400, and the various components forming low-travel keyboard assembly 200.
• PCB 500 may also include one or more apertures 504 extending through each of the recesses 502. That is, aperture 504 may pass completely through PCB 500 in recess 502. As shown in FIGs. 5 and 6, aperture 504 of PCB 500 may be substantially aligned with switch opening 402 of switch housing 400 of low-travel keyboard assembly 200. The apertures 504 of PCB 500 may be utilized to receive a portion of the dome switch positioned within switch housing 400 when the dome switch collapses. [0064] As shown in FIG. 6 and discussed herein with respect to FIGs. 2-4, light-emitting assembly 201 and, specifically, leads 222 of light source 220 may be in electrical contact with light source contact 234 extending from or through PCB 500.
• Light source contact 234 may be in communication with a light source driver 530 positioned on second surface 518 of PCB 500.
• PCB 500 may have a number of light source drivers 530 positioned on second surface 518, where each light source driver 530 corresponds to, and is in electronic communication with, light-emitting assembly 201 of low-travel keyboard assembly 200.
• light source drivers 530 positioned on second surface 518 of PCB 500 may be configured to provide power and/or control to light-emitting assembly 201 during operation of low-travel keyboard assembly 200 included in electronic device 100 (see, FIG. 1 ). It is understood that FIG. 6, showing a single key assembly, may represent some or all of the keys for low-travel keyboard assembly 200.
• each switch housing 400 for each key of low-travel keyboard assembly 200 may have light-emitting assembly 201 .
• each individual keycap 300 may be illuminated by the corresponding individual light-emitting assembly 201 .
• Low-travel keyboard assembly 200 may include a keyboard shield 600 positioned below PCB 500.
• Keyboard shield 600 may be formed from a conductive adhesive sheet 602 adhered to PCB 500 opposite switch housing 400.
• Conductive adhesive sheet 602 of shield 600 may include a venting system 604, which vents air expelled from switch housing 400 when dome switch 406 collapses, as discussed herein.
• venting system 604 may include a group of channels 606 formed within and/or partially through conductive adhesive sheet 602 of shield 600 which may be in fluid communication and/or may be substantially aligned with dome switch opening 402 formed in switch housing 400 and aperture 504 formed through PCB 500.
• Conductive adhesive sheet 602 of keyboard shield 600 may be utilized to transmit signals to and/or from keyboard assembly 200 of electronic device 100 during user interaction.
• FIG. 7 shows a top view of switch housing 400 including light-emitting assembly 201 .
• Roof portion 426 of switch housing 400 and mask layer 218 of light-emitting assembly 201 are omitted in FIG. 7 to clearly show light-emitting assembly 201 positioned within light source recess 404 of switch housing 400.
• roof portion 426 of switch housing 400 and mask layer 218 of light-emitting assembly 201 may prevent light from passing through roof portion 426, directly toward keycap 300.
• light-emitting assembly 201 may be substantially surrounded by three sidewalls 450 of light source recess 404 of switch housing 400.
• light source recess 404 may be bounded by three sidewalls 450 to ensure that light emitted by light- emitting assembly 201 passes through a large portion of switch housing 400 and subsequently illuminates keycap 300 of low-travel keyboard assembly 200. That is, by substantially surrounding light-emitting assembly 201 with sidewalls 450 of light source recess 404, a majority of light (L 1 -3 ) may directly pass through switch housing 400 and/or switch housing 400 may reflect light (L 1 -3 ) toward keycap 300.
• light-emitting assembly 201 may be surrounded by a curable, transparent resin 236 (hereafter, "resin 236") that may be positioned between light-emitting assembly 201 and sidewalls 450 of light source recess 404 of switch housing 400.
• Resin 236 may be formed or placed over light-emitting assembly 201 after light-emitting assembly 201 is positioned within light source recess 404 of switch housing 400, to retain light-emitting assembly in light source recess 404 and/or to seal light-emitting assembly 201 from outside contaminants (e.g. , water).
• resin 236 may aid in dissipating heat from light- emitting assembly during operation of low-travel keyboard assembly 200.
• the transparent characteristics or properties of resin 236 may allow light to pass through resin 236 toward recess 502 to aid in illuminating the perimeter of keycap 300, as discussed herein.
• a light source may be activated.
• Light may be transmitted from the light source and through the light-emitting assembly in operation 802.
• light may pass through the phosphor structure and/or transparent material of the light-emitting assembly.
• light may be blocked from exiting the assembly in certain directions, for example by the mask layer and/or epoxy.
• the phosphor material may color-shift the light as it passes therethrough, although this is not necessary.
• light may exit the light-emitting assembly and enter an associated switch housing.
• a body of the switch housing may redirect the light upward, for example toward a top panel of the switch housing.
• the body (or portions thereof) may be reflective to facilitate redirection of light.
• light may not be substantially redirected or may be moderately or minimally redirected.
• the top panel may act as a light guide to redirect light from the switch housing toward a key cap or other input surface
• light may exit the top panel and emanate toward an underside of the key cap or other input surface.
• the light may illuminate a glyph on the key cap and/or may illuminate a perimeter of the key cap.
• keyboard assembly Although discussed herein as a keyboard assembly, it is understood that the disclosed embodiments may be used in a variety of input devices used in various electronic devices. That is, low-travel keyboard assembly 200 and the components of the assembly discussed herein may be utilized or implemented in a variety of input devices for an electronic device including, but not limited to, buttons, switches, toggles, wheels, and touch screens. [0072] The foregoing description, for purposes of explanation, used specific

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• Computer Hardware Design (AREA)
• Human Computer Interaction (AREA)
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• General Physics & Mathematics (AREA)
• Push-Button Switches (AREA)
• Input From Keyboards Or The Like (AREA)
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