# US 10,120,117 B2 · Backlight module and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,120,117 B2 - Document ID: US10120117B2 - Status: Granted - Kind: B2 - Application number: 15/109,425 - Filed: 2016-05-25 - Published: 2018-04-19 - Granted: 2018-11-06 - Earliest claimed: 2016-04-22 - Assignees: Shenzhen China Star Optoelectronics Technology Co., Ltd. - Applicants: Shenzhen China Star Optoelectronics Technology Co., Ltd. - Inventors: Yong Fan - Web page: https://patentgrep.com/patent/US10120117B2 ## CPC - G02B 6/0026: {Wavelength selective element, sheet or layer, e.g. filter or grating} - G02B 5/207: {comprising semiconducting materials} - G02B 6/002: {by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces} - G02B 6/0023: {provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source} - G02B 6/0031: {Reflecting element, sheet or layer} - G02B 6/0056: {for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements} - G02B 6/0073: {Light emitting diode [LED]} - G02B 27/30: Collimators - G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side} - G02B 19/0014: {at least one surface having optical power} - G02B 19/0061: {the light source comprising a LED} - 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 The present invention provides a backlight module. The backlight module includes a plastic frame, a backlight source and a light guide plate. The backlight source and the light guide plate are received in the plastic frame. The light guide plate includes a light incident surface and a light emitting surface. The backlight source includes a circuit board, a reflecting collimator lens fixed to the circuit board and a LED lamp disposed inside the reflecting collimator lens. The reflecting collimator lens includes a parabolic reflecting surface, and the LED lamp is located at a center location of the parabolic reflecting surface. The light incident surface is covered with a color polarizing layer, and the parabolic reflecting surface faces toward the color polarizing layer. The present invention also discloses a display device. ## Claims ### Claim 1 A backlight module, comprising a plastic frame; a backlight source; and a light guide plate; wherein, the backlight source and the light guide plate are received in the plastic frame; the light guide plate includes a light incident surface and a light emitting surface; the backlight source includes a circuit board, a reflecting collimator lens fixed to the circuit board and a LED lamp disposed inside the reflecting collimator lens; the reflecting collimator lens includes a parabolic reflecting surface, and the LED lamp is located at a center location of the parabolic reflecting surface; the light incident surface is covered with a color polarizing layer, and the parabolic reflecting surface faces toward the color polarizing layer. ### Claim 2 (depends on 1) The backlight module according to claim 1, wherein, the light guide plate includes a bottom surface disposed oppositely to the light emitting surface, the light incident surface is connected with the bottom surface and the light emitting surface, and an included angle is formed between the light incident surface and the bottom surface. ### Claim 3 (depends on 2) The backlight module according to claim 2, wherein, the first color film layer is made of one of ZnS, TiO2, CeO, CeO2, Ta2O5and SnO2 . ### Claim 4 (depends on 2) The backlight module according to claim 2, wherein, the second color filter is made of one of SiO2, MgF2, NaAlF6, ThF4and BaF2. ### Claim 5 (depends on 2) The backlight module according to claim 2, wherein, the included angle between the light incident surface and the bottom surface is greater than 0 degree and less than 90 degrees. ### Claim 6 (depends on 1) The backlight module according to claim 1, wherein, the color polarizing layer includes a first color film layer and a second color film layer overlapped with the first color film layer, and a refractive index of the first color film layer is greater than a refractive index of the second color film layer. ### Claim 7 (depends on 6) The backlight module according to claim 6, wherein, the color polarizing layer further includes a glass substrate, and the glass substrate is used for carrying the first color film layer and the second color film layer. ### Claim 8 (depends on 6) The backlight module according to claim 6, wherein, the first color film layer is made of one of ZnS, TiO2, CeO, CeO2, Ta2O5 and SnO2. ### Claim 9 (depends on 6) The backlight module according to claim 6, wherein, the second color filter is made of one of SiO2, MgF2, NaAlF6, ThF4 and BaF2. ### Claim 10 (depends on 1) The backlight module according to claim 1, wherein, the color polarizing layer includes multiple first color film layers and multiple second color film layers, the first color film layers and the second color film layers are disposed alternately and are overlapped, and a refractive index of each first color film layer is greater than a refractive index of each second color film layer. ### Claim 11 A display device including a backlight module and a liquid crystal panel, and the backlight module, comprises: a plastic frame; a backlight source; and a light guide plate; wherein, the backlight source and the light guide plate are received in the plastic frame; the light guide plate includes a light incident surface and a light emitting surface; the backlight source includes a circuit board, a reflecting collimator lens fixed to the circuit board and a LED lamp disposed inside the reflecting collimator lens; the reflecting collimator lens includes a parabolic reflecting surface, and the LED lamp is located at a center location of the parabolic reflecting surface; the light incident surface is covered with a color polarizing layer, and the parabolic reflecting surface faces toward the color polarizing layer; the liquid crystal panel is installed on the backlight module, a light emitted from the backlight source enters the liquid crystal panel after emitted from the light emitting surface of the light guide plate. ### Claim 12 (depends on 11) The display device according to claim 11, wherein, the light guide plate includes a bottom surface disposed oppositely to the light emitting surface, the light incident surface is connected with the bottom surface and the light emitting surface, and an included angle is formed between the light incident surface and the bottom surface. ### Claim 13 (depends on 12) The display device according to claim 12, wherein, the first color film layer is made of one of ZnS, TiO2, CeO, CeO2, Ta2O5and SnO2. ### Claim 14 (depends on 12) The display device according to claim 12, wherein, the included angle between the light incident surface and the bottom surface is greater than 0 degree and less than 90 degrees. ### Claim 15 (depends on 11) The display device according to claim 11, wherein, the color polarizing layer includes a first color film layer and a second color film layer overlapped with the first color film layer, and a refractive index of the first color film layer is greater than a refractive index of the second color film layer. ### Claim 16 (depends on 15) The display device according to claim 15, wherein, the second color filter is made of one of SiO2, MgF2, NaAlF6, ThF4and BaF2. ### Claim 17 (depends on 15) The display device according to claim 15, wherein, the color polarizing layer further includes a glass substrate, and the glass substrate is used for carrying the first color film layer and the second color film layer. ### Claim 18 (depends on 11) The display device according to claim 11, wherein, the color polarizing layer includes multiple first color film layers and multiple second color film layers, the first color film layers and the second color film layers are disposed alternately and are overlapped, and a refractive index of each first color film layer is greater than a refractive index of each second color film layer.