# US 2014/0153286 A1 · Light guide plate, 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 2014/0153286 A1 - Document ID: US20140153286A1 - Status: Published application - Kind: A1 - Application number: 14/079,233 - Filed: 2013-11-13 - Published: 2014-06-05 - Earliest claimed: 2012-11-15 - Assignees: Boe Technology Group Co., Ltd. - Applicants: Boe Technology Group Co., Ltd. - Inventors: SHANSHAN ZHOU - Web page: https://patentgrep.com/patent/US20140153286A1 ## CPC - G02B 6/0018: {Redirecting means on the surface of the light guide} - G02B 6/0021: {for housing at least a part of the light source, e.g. by forming holes or recesses} - 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: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract The present invention is directed to a light guide plate, a backlight module and a display device with the light guide plate comprising a bottom surface containing space for holding light sources, a light emitting surface opposite the bottom surface and a quantum dot layer is arranged in the containing space in the direction of the light emitting surface. Since the bottom surface of the light guide plate is provided with the containing space for holding the light sources, and the light sources are limited within the containing space, light diffusion due to the fact that the light sources are positioned outside the light guide plate is reduced, loss of light is reduced, and quantity of the light sources in the backlight module is reduced. Since the quantum dot layer is arranged in the containing space toward a direction of the light emitting surface, white mixed light is formed according to fluorescent effect of quantum dot materials. Further, as the quantum dots have the characteristics of high color gamut and high transmittance, display effect can be improved. ## Claims ### Claim 1 A light guide plate comprising a bottom surface and a light emitting surface opposite to the bottom surface, wherein the bottom surface is provided with a containing space for holding light sources, and a quantum dot layer is arranged in the containing space toward a direction of the light emitting surface. ### Claim 2 (depends on 1) The light guide plate according to claim 1, wherein the light emitting surface is provided with a groove at a position opposite to the containing space, and the sectional area of the groove at a position close to the light emitting surface is larger than the groove's sectional area at a position far away from the light emitting surface. ### Claim 3 (depends on 2) The light guide plate according to claim 2, wherein the groove is in the form of an inverted cone and the bottom surface of the inverted-conical groove is close to the light emitting surface. ### Claim 4 (depends on 1) The light guide plate according to claim 1, wherein the containing space is located at an end portion of the bottom surface. ### Claim 5 (depends on 1) The light guide plate according to claim 1, wherein the light guide plate further comprises a first side surface which is connected to both the light emitting surface and the bottom surface, and the containing space is located at a position where the bottom surface and the first side surface are connected. ### Claim 6 (depends on 1) The light guide plate according to claim 1, wherein the containing space is provided with a convex surface in the direction of facing toward the light sources. ### Claim 7 (depends on 6) The light guide plate according to claim 6, wherein the projection area of the convex surface is smaller than or equal to the projection area of the groove. ### Claim 8 (depends on 6) The light guide plate according to claim 6, wherein the quantum dot layer is coated on the convex surface and areas near the convex surface. ### Claim 9 (depends on 1) The light guide plate according to claim 1, wherein the size of quantum dots in the quantum dot layer is 550 nm to 650 nm. ### Claim 10 (depends on 1) A backlight module, comprising the light guide plate according to claim 1, and light sources which are held in the containing space on the bottom surface of the light guide plate. ### Claim 11 (depends on 10) The backlight module according to claim 10, wherein the light emitting surface of the light guide plate is provided with a groove at a position opposite to the containing space, and the sectional area of the groove at a position close to the light emitting surface is larger than the groove's sectional area at a position far away from the light emitting surface. ### Claim 12 (depends on 11) The backlight module according to claim 11, wherein the groove is in the form of an inverted cone and the bottom surface of the inverted-conical groove is close to the light emitting surface. ### Claim 13 (depends on 10) The backlight module according to claim 10, wherein the containing space is located at an end portion of the bottom surface. ### Claim 14 (depends on 10) The backlight module according to claim 10, wherein the light guide plate further comprises a first side surface which is connected to both the light emitting surface and the bottom surface, and the containing space is located at a position where the bottom surface and the first side surface are connected. ### Claim 15 (depends on 11) The backlight module according to claim 11, wherein the containing space is provided with a convex surface in the direction of facing toward the light sources. ### Claim 16 (depends on 15) The backlight module according to claim 15, wherein the projection area of the convex surface is smaller than or equal to the projection area of the groove. ### Claim 17 (depends on 15) The backlight module according to claim 15, wherein the quantum dot layer is coated on the convex surface and areas near the convex surface. ### Claim 18 (depends on 10) The backlight module according to claim 10, wherein the size of quantum dots in the quantum dot layer is 550 nm to 650 nm. ### Claim 19 (depends on 10) A display device, comprising the backlight module according to claim 10, and a display panel which is arranged in the light exit direction of the light guide plate in the backlight module.