# US 2014/0153283 A1 · Backlight modules and liquid display devices with the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153283 A1 - Document ID: US20140153283A1 - Status: Published application - Kind: A1 - Application number: 13/699,696 - Filed: 2012-10-12 - Published: 2014-06-05 - Earliest claimed: 2012-09-28 - Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd. - Applicants: Shenzhen China Star Optoelectronics Technology Co. Ltd. - Inventors: Jiahe Cheng - Web page: https://patentgrep.com/patent/US20140153283A1 ## CPC - G02B 6/0031: {Reflecting element, sheet or layer} - G02B 6/0091: {of the light source relative to the light guide (G02B6/0021 takes precedence)} - G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A backlight module includes a light guiding plate and a light source is disclosed. The light source includes a light body and a mask. The mask surrounds a rim of the light guiding plate to from a cavity with at least one opening. The light body is fixed on the opening and a light emitting surface of the light body faces toward an internal of the cavity. In addition, a liquid crystal display includes the above backlight module is disclosed. The backlight module and the liquid crystal display include a reduced amount of LEDs and circuit boards so that the cost and the power consumption are reduced. ## Claims ### Claim 1 A backlight module, comprising: a light guiding plate; and a light source comprises a light body and a mask, the mask surrounds a rim of the light guiding plate to from a cavity with at least one opening, the light body is fixed on the opening and a light emitting surface of the light body faces toward an internal of the cavity. ### Claim 2 (depends on 1) The backlight module as claimed in claim 1, wherein a reflective layer is arranged on an internal wall of the cavity. ### Claim 3 (depends on 2) The backlight module as claimed in claim 2, wherein a plurality of reflective points are arranged on the reflective layers. ### Claim 4 (depends on 1) The backlight module as claimed in claim 1, wherein the mask is a bending plate with U-shaped cross section, and the opening is arranged on two sides of the bending portions of the bending plate. ### Claim 5 (depends on 4) The backlight module as claimed in claim 4, wherein the light body comprises printed circuit boards (PCBs) and LEDs encapsulated on the PCBs in a circular form so that light emitting surfaces of the LEDs are hemisphere. ### Claim 6 (depends on 5) The backlight module as claimed in claim 5, wherein the cavity comprises two openings, the light from the LEDs are toward the internal of the cavity, and are reflected from the internal wall of the cavity into the light guiding plate. ### Claim 7 (depends on 5) The backlight module as claimed in claim 5, wherein at least one clasp is arranged on one edge of the bending plate. ### Claim 8 (depends on 7) The backlight module as claimed in claim 7, wherein at least one slot is arranged on a side surface of the light guiding plate in accordance with the clasp so that the mask is assembled with the light guiding plate by engaging the clasp and the slot. ### Claim 9 (depends on 4) The backlight module as claimed in claim 4, wherein the bending plate is formed by applying a punch-shaping process to a metallic sheet. ### Claim 10 A liquid crystal device, comprising: a backlight module, comprising: a light guiding plate; and a light source comprises a light body and a mask, the mask surrounds a rim of the light guiding plate to from a cavity with at least one opening, the light body is fixed on the opening and a light emitting surface of the light body faces toward an internal of the cavity. ### Claim 11 (depends on 10) The liquid crystal display as claimed in claim 10, wherein a reflective layer is arranged on an internal wall of the cavity. ### Claim 12 (depends on 11) The liquid crystal display as claimed in claim 11, wherein a plurality of reflective points are arranged on the reflective layers. ### Claim 13 (depends on 10) The liquid crystal display as claimed in claim 10, wherein the mask is a bending plate with U-shaped cross section, and the opening is arranged on two sides of the bending portions of the bending plate. ### Claim 14 (depends on 13) The liquid crystal display as claimed in claim 13, wherein the light body comprises printed circuit boards (PCBs) and LEDs encapsulated on the PCBs in a circular form so that light emitting surfaces of the LEDs are hemisphere. ### Claim 15 (depends on 14) The liquid crystal display as claimed in claim 14, the cavity comprises two openings, the light from the LEDs are toward the internal of the cavity, and are reflected from the internal wall of the cavity into the light guiding plate. ### Claim 16 (depends on 14) The liquid crystal display as claimed in claim 14, wherein at least one clasp is arranged on one edge of the bending plate. ### Claim 17 (depends on 16) The liquid crystal display as claimed in claim 16, wherein at least one slot is arranged on a side surface of the light guiding plate in accordance with the clasp so that the mask is assembled with the light guiding plate by engaging the clasp and the slot. ### Claim 18 (depends on 13) The liquid crystal display as claimed in claim 13, the bending plate is formed by applying a punch-shaping process to a metallic sheet.