# US 2018/0024645 A1 · Method and system for assembling backlight module > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0024645 A1 - Document ID: US20180024645A1 - Status: Published application - Kind: A1 - Application number: 15/723,438 - Filed: 2017-10-03 - Published: 2018-01-25 - Earliest claimed: 2016-04-18 - Assignees: Primax Electronics Ltd. - Applicants: Primax Electronics Ltd. - Inventors: Chung-Yuan Chen; Bing Zhang - Web page: https://patentgrep.com/patent/US20180024645A1 ## CPC - G06F 3/0202: {Constructional details or processes of manufacture of the input device} - H01H 13/83: characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements - H01H 13/88: Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards - H01H 2219/04: Attachments; Connections - H01H 2219/062: Light conductor - H01H 2229/056: Laminating - H01H 2229/064: Eliminating tolerances - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - 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) ## Abstract A backlight module assembling method is provided for assembling a backlight module of a luminous keyboard. The backlight module includes a first coupled element and a second coupled element in a stack form. Firstly, a positioning device is provided. After the first coupled element is aligned with a predetermined position of an assembling table surface through the positioning device, the first coupled element is placed on the predetermined position. Then, the first coupled element on the predetermined position is adsorbed according to vacuum adsorption. Consequently, the first coupled element is evenly fixed on the predetermined position. After the first coupled element is evenly fixed on the predetermined position, the second coupled element is aligned with and placed on the first coupled element. Consequently, the second coupled element and the first coupled element are combined together. ## Claims ### Claim 1 A backlight module assembling method for assembling a backlight module of a luminous keyboard, the backlight module comprising a first coupled element and a second coupled element in a stack form, at least one of the first coupled element and the second coupled element is equipped with plural coupling objects, the first coupled element and the second coupled element being combined together through the plural coupling objects, the backlight module assembling method comprising steps of: (a) providing a positioning device, wherein after the first coupled element is aligned with a predetermined position of an assembling table surface through the positioning device, the first coupled element is placed on the predetermined position of the assembling table surface; and (b) allowing the first coupled element on the predetermined position of the assembling table surface to be adsorbed according to vacuum adsorption, so that the first coupled element is evenly fixed on the predetermined position of the assembling table surface, wherein after the first coupled element is evenly fixed on the predetermined position of the assembling table surface, the second coupled element is aligned with and placed on the first coupled element, so that the second coupled element and the first coupled element are combined together. ### Claim 2 (depends on 1) The backlight module assembling method according to claim 1, wherein the second coupled element is aligned with and placed on the first coupled element through the positioning device. ### Claim 3 (depends on 1) The backlight module assembling method according to claim 1, wherein the positioning device is an automatic optical inspection (AOI) device, or the positioning device comprises at least one positioning post on the assembling table surface, wherein at least one first positioned hole of the first coupled element is sheathed around the corresponding positioning post, or at least one second positioned hole of the second coupled element is sheathed around the corresponding positioning post. ### Claim 4 (depends on 1) The backlight module assembling method according to claim 1, wherein after the second coupled element is aligned with and placed on the first coupled element, the backlight module assembling method further comprises a step (c) of pressing at least one pressed position of a combination of the first coupled element and the second coupled element. ### Claim 5 (depends on 4) The backlight module assembling method according to claim 4, wherein the at least one pressed position is aligned with at least one of the plural coupling objects. ### Claim 6 (depends on 1) The backlight module assembling method according to claim 1, wherein from top to bottom, the backlight module comprises a light-shading plate, a light guide plate, a reflective plate and a flexible circuit board with a light source, wherein the first coupled element is the flexible circuit board, and the second coupled element is the reflective plate. ### Claim 7 (depends on 6) The backlight module assembling method according to claim 6, wherein the reflective plate has a reflective plate opening corresponding to the light source, wherein when the second coupled element is aligned with and placed on the first coupled element, the light source is penetrated through the reflective plate opening. ### Claim 8 (depends on 1) The backlight module assembling method according to claim 1, wherein from top to bottom, the backlight module comprises a light-shading plate, a light guide plate, a reflective plate and a flexible circuit board with a light source, wherein the first coupled element is the light-shading plate, and the second coupled element is the light guide plate. ### Claim 9 (depends on 1) The backlight module assembling method according to claim 1, wherein from top to bottom, the backlight module comprises a light-shading plate, a light guide plate, a reflective plate and a flexible circuit board with a light source, wherein the first coupled element is a combination of the flexible circuit board and the reflective plate, and the second coupled element is a combination of the light-shading plate and light guide plate. ### Claim 10 (depends on 9) The backlight module assembling method according to claim 9, wherein the light guide plate has a light guide plate opening corresponding to the light source, wherein when the second coupled element is aligned with and placed on the first coupled element, the light source is penetrated through the light guide plate opening. ### Claim 11 (depends on 1) The backlight module assembling method according to claim 1, wherein at least one of the plural coupling objects is a colloidal glue.