Solid state bidirectional light sheet having vertical orientation
First Claim
Patent Images
1. A lighting device for general illumination comprising:
- two or more bidirectional light sheets, each bidirectional light sheet being planar and comprising;
a first substrate comprising a first light emitting surface,a second substrate comprising a second light emitting surface opposing the first light emitting surface,a plurality of first non-packaged light emitting diode (LED) dies, anda plurality of second non-packaged LED dies, the first and second non-packaged LED dies being disposed between the first and second substrates such that during operation of the lighting device a peak intensity of light emitted by the first non-packaged LED dies is output from the first light emitting surface in a first direction, and a peak intensity of light emitted by the second non-packaged LED dies is output from the second light emitting surface in a second direction different from the first direction,a plurality of conductors configured to provide power to the first and second non-packaged LED dies, the first and second non-packaged LED dies connected to the conductors without wires, the conductors formed on at least one of the first and second substrate; and
a support for affixing the two or more planar bidirectional light sheets to a ceiling, the support comprising a planar base, wherein each of the two or more planar bidirectional light sheets has an edge affixed to the planar base, such that the first and second light emitting surfaces of at least one of the planar bidirectional light sheets are non-parallel to the ceiling, and an angle formed by each of the two or more planar bidirectional light sheets with respect to a surface normal of the planar base is individually adjustable.
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Abstract
An array of LEDs (e.g., 500 LEDs) is sandwiched between at least two transparent substrates having conductors bonded to the electrodes without wires, forming light sheets to emit light from opposite surfaces of the light sheet to create a bidirectional light sheet. The light sheet may be suspended from a ceiling to be perpendicular to the ceiling, or the angles of the light sheet may be adjusted. The suspended light sheet may form a cylinder for uniform illumination of the floor and ceiling. Lenses may be formed in the light sheet.
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Citations
23 Claims
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1. A lighting device for general illumination comprising:
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two or more bidirectional light sheets, each bidirectional light sheet being planar and comprising; a first substrate comprising a first light emitting surface, a second substrate comprising a second light emitting surface opposing the first light emitting surface, a plurality of first non-packaged light emitting diode (LED) dies, and a plurality of second non-packaged LED dies, the first and second non-packaged LED dies being disposed between the first and second substrates such that during operation of the lighting device a peak intensity of light emitted by the first non-packaged LED dies is output from the first light emitting surface in a first direction, and a peak intensity of light emitted by the second non-packaged LED dies is output from the second light emitting surface in a second direction different from the first direction, a plurality of conductors configured to provide power to the first and second non-packaged LED dies, the first and second non-packaged LED dies connected to the conductors without wires, the conductors formed on at least one of the first and second substrate; and a support for affixing the two or more planar bidirectional light sheets to a ceiling, the support comprising a planar base, wherein each of the two or more planar bidirectional light sheets has an edge affixed to the planar base, such that the first and second light emitting surfaces of at least one of the planar bidirectional light sheets are non-parallel to the ceiling, and an angle formed by each of the two or more planar bidirectional light sheets with respect to a surface normal of the planar base is individually adjustable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A lighting device for general illumination comprising:
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two or more bidirectional light sheets, each bidirectional light sheet comprising; a sheet comprising a first sheet surface and a second sheet surface, a first base substrate comprising a first indented surface and a first base surface opposing the first indented surface, wherein the first base surface is adjacent to the first sheet surface and the first indented surface comprises a plurality of first indentations, the first indentations being spaced apart from one another, a second base substrate comprising a second indented surface and a second base surface opposing the second indented surface, wherein the second base surface is adjacent to the second sheet surface such that the sheet is sandwiched between the first and second base substrates, and the second indented surface comprises a plurality of second indentations, the second indentations being spaced apart from one another, a first substrate comprising a first light emitting surface and a first cover surface, the first cover surface of the first substrate being in contact with the first indented surface of the first base substrate between the spaced apart first indentations, a plurality of first non-packaged light emitting diode (LED) dies being disposed between the first base substrate and the first substrate in respective first indentations such that during operation of the bidirectional light sheet a peak intensity of light emitted by the first non-packaged LED dies is output from the first light emitting surface in a first direction, a plurality of first conductors configured to provide power to the first non-packaged LED dies, where the first non-packaged LED dies are connected to the first conductors without wires, and the first conductors are formed on the first indented surface of the first base substrate and on the first cover surface of the first substrate, a second substrate comprising a second light emitting surface and a second cover surface, the second cover surface of the second substrate being in contact with the second indented surface of the second base substrate between the spaced apart second indentations, a plurality of second non-packaged light emitting diode (LED) dies being disposed between the second base substrate and the second substrate in respective second indentations such that during operation of the bidirectional light sheet a peak intensity of light emitted by the second non-packaged LED dies is output from the second light emitting surface in a second direction different from the first direction, and a plurality of second conductors configured to provide power to the second non-packaged LED dies, where the second non-packaged LED dies are connected to the second conductors without wires, and the second conductors are formed on the second indented surface of the second base substrate and on the second cover surface of the second substrate; and a support for affixing the two or more bidirectional light sheets to a ceiling such that the first and second light emitting surfaces of at least one of the bidirectional light sheets are non-parallel to the ceiling. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A lighting device for general illumination comprising:
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four bidirectional light sheets, each bidirectional light sheet being a planar trapezoid and comprising; a first substrate comprising a first light emitting surface, a second substrate comprising a second light emitting surface opposing the first light emitting surface, a plurality of first non-packaged light emitting diode (LED) dies, and a plurality of second non-packaged LED dies, the first and second non-packaged LED dies being disposed between the first and second substrates such that during operation of the lighting device a peak intensity of light emitted by the first non-packaged LED dies is output from the first light emitting surface in a first direction, and a peak intensity of light emitted by the second non-packaged LED dies is output from the second light emitting surface in a second direction different from the first direction, a plurality of conductors configured to provide power to the first and second non-packaged LED dies, the first and second non-packaged LED dies connected to the conductors without wires, the conductors formed on at least one of the first and second substrate; and a support for affixing the four planar bidirectional light sheets to a ceiling, the support comprising a planar base, wherein each of the four planar bidirectional light sheets has an edge affixed to the planar base and two edges joined with corresponding edges of two other of the four bidirectional light sheets, such that the four bidirectional light sheets form a truncated pyramid shell with two opposite openings, and during operation, the support affixes the truncated pyramid shell to the ceiling such that one of the two openings faces the ceiling and the other one faces a floor opposite the ceiling, and the peak intensity of the light output from the inner surface of the truncated pyramid shell is directed towards the ceiling and the peak intensity of the light output from the outer surface of the truncated pyramid shell is directed towards the floor. - View Dependent Claims (20, 21)
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22. A lighting device for general illumination comprising:
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four bidirectional light sheets, each bidirectional light sheet being planar and comprising; a first substrate comprising a first light emitting surface, a second substrate comprising a second light emitting surface opposing the first light emitting surface, a plurality of first non-packaged light emitting diode (LED) dies, and a plurality of second non-packaged LED dies, the first and second non-packaged LED dies being disposed between the first and second substrates such that during operation of the lighting device a peak intensity of light emitted by the first non-packaged LED dies is output from the first light emitting surface in a first direction, and a peak intensity of light emitted by the second non-packaged LED dies is output from the second light emitting surface in a second direction different from the first direction, a plurality of conductors configured to provide power to the first and second non-packaged LED dies, the first and second non-packaged LED dies connected to the conductors without wires, the conductors formed on at least one of the first and second substrate; and a support for affixing the four planar bidirectional light sheets to a ceiling, the support comprising a planar base, such that each of the four planar bidirectional light sheets has an edge affixed to the planar base, wherein the four planar bidirectional light sheets are parallel to a surface normal of the planar base, and the affixed edges outline a rectangle.
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23. A lighting device for general illumination comprising:
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two or more bidirectional light sheets, each bidirectional light sheet being planar and comprising; a first substrate comprising a first light emitting surface, a second substrate comprising a second light emitting surface opposing the first light emitting surface, a plurality of first non-packaged light emitting diode (LED) dies, and a plurality of second non-packaged LED dies, the first and second non-packaged LED dies being disposed between the first and second substrates such that during operation of the lighting device a peak intensity of light emitted by the first non-packaged LED dies is output from the first light emitting surface in a first direction, and a peak intensity of light emitted by the second non-packaged LED dies is output from the second light emitting surface in a second direction different from the first direction, a plurality of conductors configured to provide power to the first and second non-packaged LED dies, the first and second non-packaged LED dies connected to the conductors without wires, the conductors formed on at least one of the first and second substrate; and a support for affixing the two or more planar bidirectional light sheets to a ceiling such that the first and second light emitting surfaces of at least one of the planar bidirectional light sheets are non-parallel to the ceiling, the support comprising a planar base, wherein each of the two or more planar bidirectional light sheets has an edge affixed to the planar base, and when the planar base of the support is affixed to the ceiling, peak intensities of the light output from the two or more planar bidirectional light sheets during operation are directed towards a floor opposite the ceiling.
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Specification