# US 2019/0318890 A1 · Keyswitch assembly and keyboard > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0318890 A1 - Document ID: US20190318890A1 - Status: Published application - Kind: A1 - Application number: 16/141,073 - Filed: 2018-09-25 - Published: 2019-10-17 - Earliest claimed: 2018-04-11 - Assignees: LITE-ON Technology (Chang Zhou) Co., LTD.; Lite-On Technology Corporation - Applicants: LITE-ON Technology (Chang Zhou) Co., LTD.; LITE-ON Technology Corporation - Inventors: Xiao Qiang Liang; Bing Wei Zhang; Chia-Shiun Wu; Xiang Zhao - Web page: https://patentgrep.com/patent/US20190318890A1 ## CPC - G02B 6/0028: {Light guide, e.g. taper} - H01H 13/83: characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements - G02B 6/0016: {Grooves, prisms, gratings, scattering particles or rough surfaces} - G02B 6/0025: {Diffusing sheet or layer; Prismatic sheet or layer} - G02B 6/003: {Lens or lenticular sheet or layer} - G02B 6/0031: {Reflecting element, sheet or layer} - G02B 6/006: {to produce indicia, symbols, texts or the like} - G06F 3/02: Input arrangements using manually operated switches, e.g. using keyboards or dials - G06F 3/0202: {Constructional details or processes of manufacture of the input device} - G02B 6/0036: {2-D arrangement of prisms, protrusions, indentations or roughened surfaces} - G02B 6/0043: {provided on the surface of the light guide} - G02B 6/0065: {Manufacturing aspects; Material aspects} - G02B 6/0095: {Light guides as housings, housing portions, shelves, doors, tiles, windows, or the like} - H01H 3/125: {using a scissor mechanism as stabiliser} - H01H 2219/044: Edge lighting of layer - H01H 2219/056: Diffuser; Uneven surface - H01H 2219/062: Light conductor - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A keyswitch assembly is provided. The keyswitch assembly includes a keyswitch module having a key cap, a light guiding member disposed above an outer surface of the key cap and a light source module disposed corresponding to the light guiding member. The light guiding member has a first surface adjacent to the key cap and a second surface facing away from the key cap and opposite the first surface. The light source module provides a light beam incident to the light guiding member. In the invention, the illumination effect of the keyswitch assembly is improved and the power consumption of the keyswitch assembly is reduced by way of disposing the light guiding member of the keyswitch assembly above the outer surface of the key cap. ## Claims ### Claim 1 A keyswitch assembly, comprising: a keyswitch module having a key cap; a light guiding member disposed above an outer surface of the key cap, the light guiding member having a first surface adjacent to the key cap and a second surface facing away from the key cap and opposite the first surface; a light source module disposed corresponding to the light guiding member, the light source module providing a light beam incident to the light guiding member. ### Claim 2 (depends on 1) The keyswitch assembly according to claim 1, wherein the light guiding member further comprises a plurality of light diffusing structures configured on the first surface of the light guiding member, and the light diffusing structure scatters the light beam provided by the light source module. ### Claim 3 (depends on 2) The keyswitch assembly according to claim 2, wherein the light diffusing structure is a texturing structure, a V-shaped groove structure or a microlens structure. ### Claim 4 (depends on 1) The keyswitch assembly according to claim 1, wherein the keyswitch assembly comprises a light shielding sheet disposed on the first surface of the light guiding member. ### Claim 5 (depends on 4) The keyswitch assembly according to claim 4, wherein the light shielding sheet is a reflective sheet. ### Claim 6 (depends on 1) The keyswitch assembly according to claim 1, wherein the keyswitch assembly further comprises a character sheet disposed on the second surface of the light guiding member, and the character sheet comprising a character corresponding to the key cap. ### Claim 7 (depends on 6) The keyswitch assembly according to claim 6, wherein the character sheet comprises a light shielding region and a light transmission region having a shape corresponding to the shape of the character. ### Claim 8 (depends on 7) The keyswitch assembly according to claim 7, wherein the light transmission region comprises a plurality of holes. ### Claim 9 (depends on 1) The keyswitch assembly according to claim 1, wherein the keyswitch assembly further comprises a character sheet disposed above the outer surface of the key cap, the character sheet comprising a character. ### Claim 10 (depends on 1) The keyswitch assembly according to claim 1, wherein the keyswitch assembly further comprises a character sheet disposed on the first surface of the light guiding member, the character sheet comprising a character corresponding to the key cap. ### Claim 11 (depends on 10) The keyswitch assembly according to claim 10, wherein the character sheet comprises a light shielding region and a light transmission region having a shape corresponding to the shape of the character. ### Claim 12 (depends on 10) The keyswitch assembly according to claim 10, wherein the character sheet comprises a light shielding region and a light shielding region having a shape corresponding to the shape of the character. ### Claim 13 (depends on 1) The keyswitch assembly according to claim 1, wherein the keyswitch module comprises: a bottom plate; a film circuit board disposed on the bottom plate; a lifting assembly disposed on the bottom plate and corresponding to the film circuit board; and an elastic member disposed in the lifting assembly and corresponds to the film circuit board; wherein the key cap is disposed on the lifting assembly. ### Claim 14 A keyboard, comprising: a plurality of keyswitch modules, each having a key cap; a light guiding member disposed above an outer surface of the key cap; and a light source module disposed corresponding to the light guiding member, the light source module providing a light beam incident to the light guiding member.