Backlight unit and display device including the same
First Claim
Patent Images
1. A display device, comprising:
- a display module; and
a backlight unit which provides a light having a coherent property to the display module, the backlight unit comprising;
a light source comprising a light source unit which generates the light having the coherent property and a beam expander which expands the light generated by the light source unit;
a beam splitter array comprising a plurality of transflective plates which transmit or reflect the light provided from the light source;
a light conversion structure which is disposed below the display module, receives the light reflected by the plurality of transflective plates and guides the received light in a direction toward the display module; and
an optical film which is disposed on the light conversion structure and changes a propagation direction of light, which is incident from the light conversion structure, to a predetermined direction,wherein the beam expander is interposed between the light source unit and the beam splitter array,wherein the display module displays a hologram image, andwherein the optical film is a holographic optical element (HOE) film.
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Abstract
A display device includes a display module and a backlight unit which provides a light having a coherent property to the display module. The backlight unit includes a light source which generates the light having the coherent property, a beam splitter array including a plurality of transflective plates which transmit or reflect the light provided from the light source, and a light conversion structure which is provided below the display module, receives the light reflected by the transflective plates and guides the received light in a direction toward the display module.
54 Citations
33 Claims
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1. A display device, comprising:
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a display module; and a backlight unit which provides a light having a coherent property to the display module, the backlight unit comprising; a light source comprising a light source unit which generates the light having the coherent property and a beam expander which expands the light generated by the light source unit; a beam splitter array comprising a plurality of transflective plates which transmit or reflect the light provided from the light source; a light conversion structure which is disposed below the display module, receives the light reflected by the plurality of transflective plates and guides the received light in a direction toward the display module; and an optical film which is disposed on the light conversion structure and changes a propagation direction of light, which is incident from the light conversion structure, to a predetermined direction, wherein the beam expander is interposed between the light source unit and the beam splitter array, wherein the display module displays a hologram image, and wherein the optical film is a holographic optical element (HOE) film. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A display device, comprising:
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a display module; and a backlight unit which provides a light having a coherent property to the display module, the backlight unit comprising; a light source comprising a light source unit which generates a first light having the coherent property and a point-like cross-section and a beam expander which expands the light generated by the light source unit; a beam splitter array, which is disposed adjacent to the light source, converts the first light provided from the light source to a second light having a linear cross-section, and comprises a plurality of transflective plates; a light conversion structure, which is disposed below the display module and converts the second light provided from the beam splitter array to a third light having a planar cross-section; and an optical film which is disposed on the light conversion structure and changes a propagation direction of light, which is incident from the light conversion structure, to a predetermined direction, wherein the plurality of transflective plates is arranged parallel to a propagation direction of the first light and reflects at least a part of the first light in a direction toward the light conversion structure, wherein the beam expander is interposed between the light source unit and the beam splitter array, wherein the display module displays a hologram image, and wherein the optical film is a holographic optical element (HOE) film.
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33. A backlight unit, comprising:
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a light source comprising a light source unit which generates a light having a coherent property and a beam expander which expands the light generated by the light source unit; a light guide plate which guides a propagating direction of light incident thereto to an upward direction; a beam splitter array disposed between the light source and the light guide plate, the beam splitter array comprising a plurality of transflective plates; and an optical film which is disposed on the light conversion structure and changes a propagation direction of light, which is incident from the light conversion structure, to a predetermined direction, wherein each of the plurality of transflective plates reflects a part of the light provided from the light source toward the light guide plate and passes another part of the light to be incident into another adjacent one of the plurality of transflective plates, wherein the beam expander is interposed between the light source unit and the beam splitter array, and wherein the optical film is a holographic optical element (HOE).
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Specification