Backlight module and double-sided liquid crystal display device
First Claim
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1. A backlight module, comprising:
- a light emitting component comprising a first light exit surface and a second light exit surface disposed opposite to each other;
a first liquid crystal brightness enhancement film and a first quarter-wave plate sequentially disposed along a light emitting direction of the first light exit surface;
a second liquid crystal brightness enhancement film and a second quarter-wave plate sequentially disposed along a light emitting direction of the second light exit surface;
wherein a rotation structure of the first liquid crystal brightness enhancement film is opposite to a rotation structure of the second liquid crystal brightness enhancement film;
wherein the light emitting component comprises;
a light guide plate and a light source;
the light guide plate comprises two light exit surfaces serving as the first light exit surface and the second light exit surface, respectively, and a lateral surface connecting the two light exit surfaces;
the lateral surface comprises at least a light incident surface;
a light emitting surface of the light source faces the light incident surface of the light guide plate;
wherein a plurality of facets and a plurality of grooves with a longitudinal section of triangular shape are disposed on each light exit surface;
each facet is parallel to a light exit surface on which the facet is located and disposed between two adjacent grooves;
the plurality of grooves on the first light exit surface are interlaced with the plurality of grooves on the second light exit surface;
each facet located on the first light exit surface corresponds to a groove located on the second light exit surface, and each facet located on the second light exit surface corresponds to a groove located on the first light exit surface;
each groove on the first light exit surface is arranged to redirect light emitted by the light source to a corresponding facet located on the second light exit surface, and each groove on the second light exit surface is arranged to redirect light emitted by the light source to a corresponding facet located on the first light exit surface.
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Abstract
The present disclosure provides a backlight module and a double-sided liquid crystal display device. The light utilization efficiency of the backlight module is improved. The backlight module includes a light emitting component, the light emitting component includes a first light exit surface and a second light exit surface disposed opposite to each other. A first liquid crystal brightness enhancement film and a first quarter-wave plate are sequentially disposed along a light emitting direction of the first light exit surface. A second liquid crystal brightness enhancement film and a second quarter-wave plate are sequentially disposed along a light emitting direction of the second light exit surface. A rotation structure of the first liquid crystal brightness enhancement film is opposite to a rotation structure of the second liquid crystal brightness enhancement film.
6 Citations
16 Claims
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1. A backlight module, comprising:
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a light emitting component comprising a first light exit surface and a second light exit surface disposed opposite to each other;
a first liquid crystal brightness enhancement film and a first quarter-wave plate sequentially disposed along a light emitting direction of the first light exit surface;
a second liquid crystal brightness enhancement film and a second quarter-wave plate sequentially disposed along a light emitting direction of the second light exit surface;wherein a rotation structure of the first liquid crystal brightness enhancement film is opposite to a rotation structure of the second liquid crystal brightness enhancement film; wherein the light emitting component comprises;
a light guide plate and a light source;
the light guide plate comprises two light exit surfaces serving as the first light exit surface and the second light exit surface, respectively, and a lateral surface connecting the two light exit surfaces;
the lateral surface comprises at least a light incident surface;
a light emitting surface of the light source faces the light incident surface of the light guide plate;wherein a plurality of facets and a plurality of grooves with a longitudinal section of triangular shape are disposed on each light exit surface;
each facet is parallel to a light exit surface on which the facet is located and disposed between two adjacent grooves;
the plurality of grooves on the first light exit surface are interlaced with the plurality of grooves on the second light exit surface;
each facet located on the first light exit surface corresponds to a groove located on the second light exit surface, and each facet located on the second light exit surface corresponds to a groove located on the first light exit surface;
each groove on the first light exit surface is arranged to redirect light emitted by the light source to a corresponding facet located on the second light exit surface, and each groove on the second light exit surface is arranged to redirect light emitted by the light source to a corresponding facet located on the first light exit surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification
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Current AssigneeBOE Technology Group Co., Ltd.
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Original AssigneeBOE Technology Group Co., Ltd.
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InventorsDu, Zhihong, Li, Wenbo
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Primary Examiner(s)Caley, Michael H
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Assistant Examiner(s)Qureshi, Mariam
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Application NumberUS15/985,418Publication NumberTime in Patent Office715 DaysField of SearchUS Class CurrentCPC Class CodesG02B 6/0016 Grooves, prisms, gratings, ...G02B 6/0025 Diffusing sheet or layer; P...G02B 6/0038 Linear indentations or groo...G02B 6/0056 for producing polarisation ...G02B 6/0061 to provide homogeneous ligh...G02B 6/0063 for extracting light out bo...G02F 1/133342 for double-sided displaysG02F 1/133504 Diffusing, scattering, diff...G02F 1/133528 PolarisersG02F 1/133611 including means for improvi...G02F 1/133615 Edge-illuminating devices, ...
