# US 8,786,791 B2 · Display device and backlight module thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,786,791 B2 - Document ID: US8786791B2 - Status: Granted - Kind: B2 - Application number: 13/485,931 - Filed: 2012-06-01 - Published: 2012-12-06 - Granted: 2014-07-22 - Earliest claimed: 2011-06-01 - Assignees: Dongguan Masstop Liquid Crystal Display Co., Ltd.; Wintek Corporation - Applicants: Chong-Yang Fang - Inventors: Chong-Yang Fang - Web page: https://patentgrep.com/patent/US8786791B2 ## CPC - G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members} - G02F 1/133607: {the light controlling member including light directing or refracting elements, e.g. prisms or lenses} - 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 display device and a backlight module are provided in the present invention. The display device includes the backlight module and a liquid crystal display panel. The backlight module, which is used to provide a backlight source for the liquid crystal display panel, includes a luminant device and a micro-lens array. The luminant device is disposed under the liquid crystal display panel, and the luminant device has a plurality of first luminant regions and a plurality of second luminant regions. The micro-lens array is disposed between the luminant device and the liquid crystal display panel. The micro-lens array includes a plurality of micro-lenses, and each of the micro-lenses overlaps at least one first luminant region and at least one second luminant region in a direction perpendicular to the liquid crystal display panel. ## Claims ### Claim 1 A backlight module, which is used to provide a backlight source for a liquid crystal display panel, the backlight module comprising: a luminant device, disposed under the liquid crystal display panel, the luminant device comprising a plurality of first luminant regions and a plurality of second luminant regions, wherein each of the first luminant regions and each of the second luminant regions are disposed alternately along a first direction; and a micro-lens array, disposed between the luminant device and the liquid crystal display panel, wherein the micro-lens array comprises a plurality of micro-lenses, and each of the micro-lenses overlaps at least one first luminant region and at least one second luminant region in a direction perpendicular to the liquid crystal display panel; wherein each of the first luminant regions provides light in a first display direction via a partial area of the corresponding micro-lens, and each of the second luminant regions provides light in a second display direction via a partial area of the corresponding micro-lens, wherein under a first stereoscopic display mode, a timing of providing light along the first display direction from the first luminant regions is separated from a timing of providing light along the second display direction from the second luminant regions. ### Claim 2 (depends on 1) The backlight module of claim 1, wherein each of the micro-lenses includes a lenticular lens or a linear Fresnel lens. ### Claim 3 (depends on 2) The backlight module of claim 2, wherein the first luminant regions and the second luminant regions are disposed along a second direction, which is not parallel to the first direction, and each of the micro-lenses has an axis direction parallel to the second direction. ### Claim 4 (depends on 1) The backlight module of claim 1, wherein the luminant device further comprises a plurality of light emitting units respectively disposed in the first luminant regions and the second luminant regions, and each of the light emitting units includes a light emitting diode (LED) or an organic light emitting diode (OLED). ### Claim 5 (depends on 1) The backlight module of claim 1, wherein the luminant device further comprises a flat light source device and a barrier panel, the barrier panel comprises a plurality of first barrier pixels respectively disposed in the first luminant regions and a plurality of second barrier pixels respectively disposed in the second luminant regions, and wherein each of the first barrier pixels is employed for blocking light from each of the first luminant regions, and each of the second barrier pixels is employed for blocking light from each of the second luminant regions under a stereoscopic display mode. ### Claim 6 (depends on 5) The backlight module of claim 5, wherein the barrier panel includes a liquid crystal panel. ### Claim 7 (depends on 5) The backlight module of claim 5, wherein the flat light source device includes a light source, a light guide sheet, a reflective sheet, a diffusion sheet, or at least a prism sheet. ### Claim 8 (depends on 1) The backlight module of claim 1, wherein under a second stereoscopic display mode, a timing of providing light along the first display direction from each of the first luminant regions and a timing of providing light along the second display direction from the second luminant region adjacent to the first luminant region partially overlap each other. ### Claim 9 (depends on 1) The backlight module of claim 1, wherein under a two-dimensional display mode, the first luminant regions and the second luminant regions respectively provide light along the first display direction and the second display direction simultaneously. ### Claim 10 (depends on 1) A display device, comprising a liquid crystal display panel; and the backlight module of claim 1, wherein the backlight module is disposed under the liquid crystal display panel. ### Claim 11 A display device, comprising a liquid crystal display panel, the liquid crystal panel comprising a plurality of pixels; and a backlight module, disposed under the liquid crystal display panel, the backlight module comprising: a luminant device, disposed under the liquid crystal display panel, the luminant device comprising a plurality of first luminant regions and a plurality of second luminant regions, wherein each of the first luminant regions and each of the second luminant regions are disposed alternately along a first direction; and a micro-lens array, disposed between the luminant device and the liquid crystal display panel, wherein the micro-lens array comprises a plurality of micro-lenses, and each of the micro-lenses overlaps at least one first luminant region and at least one second luminant region in a direction perpendicular to the liquid crystal display panel, wherein each of the first luminant regions provides light in a first display direction via a partial area of the corresponding micro-lens, and each of the second luminant regions provides light in a second display direction via a partial area of the corresponding micro-lens, wherein each of the pixels overlaps one of the first luminant regions and the adjacent second luminant region along the direction perpendicular to the liquid crystal display panel. ### Claim 12 (depends on 11) The display device of claim 11, wherein each of the micro-lenses includes a lenticular lens or a linear Fresnel lens. ### Claim 13 (depends on 12) The display device of claim 12, wherein the first luminant regions and the second luminant regions are disposed along a second direction, which is not parallel to the first direction, and each of the micro-lenses has an axis direction parallel to the second direction. ### Claim 14 (depends on 11) The display device of claim 11, wherein the luminant device further comprises a plurality of light emitting units respectively disposed in the first luminant regions and the second luminant regions, and each of the light emitting units includes a light emitting diode or an organic light emitting diode. ### Claim 15 (depends on 11) The display device of claim 11, wherein the luminant device further comprises a flat light source device and a barrier panel, the barrier panel comprises a plurality of first barrier pixels respectively disposed in the first luminant regions and a plurality of second barrier pixels respectively disposed in the second luminant regions, and wherein each of the first barrier pixels is employed for blocking light from each of the first luminant regions, and each of the second barrier pixels is employed for blocking light from each of the second luminant regions under a stereoscopic display mode. ### Claim 16 (depends on 15) The display device of claim 15, wherein the barrier panel includes a liquid crystal panel. ### Claim 17 (depends on 15) The display device of claim 15, wherein the flat light source device includes a light source, a light guide sheet, a reflective sheet, a diffusion sheet, or at least a prism sheet. ### Claim 18 (depends on 11) The display device of claim 11, wherein under a first stereoscopic display mode, a timing of providing light along the first display direction from the first luminant regions is separated from a timing of providing light along the second display direction from the second luminant regions. ### Claim 19 (depends on 11) The display device of claim 11, wherein under a second stereoscopic display mode, a timing of providing light along the first display direction from each of the first luminant regions and a timing of providing light along the second display direction from the second luminant region adjacent to the first luminant region partially overlap each other. ### Claim 20 (depends on 11) The display device of claim 11, wherein under a two-dimensional display mode, the first luminant regions and the second luminant regions respectively provide light along the first display direction and the second display direction simultaneously.