Plane-like lighting units and display equipment provided therewith
AssigneeHitachi, Ltd.
InventorsMasaya Adachi, Ikuo Hiyama, Makoto Tsumura, Shusuke Endo
Life of this patent
Estimating the term…
Abstract
A lighting unit having a plurality of light-emitting diode (LED) light sources arranged in parallel, a plurality of light-guiding members arranged along a direction wherein the LED light sources are arranged, a light reflecting part arranged on one side face of the light-guiding members, a light diffusion part arranged on an other side face of the light-guiding members, a light semi-transmitting reflection part arranged between the LED light source and the light diffusion part, and an optical path changing part arranged above the light-guiding members. A side of the light-guiding members that faces the light diffusion part is flat.
Claims9
A lighting unit comprising:
- a plurality of light-emitting diode (LED) light sources arranged in parallel;
- a plurality of light-guiding members arranged along a direction wherein said LED light sources are arranged;
- a light reflecting part arranged on one side face of said light-guiding members;
- a light diffusion part arranged on an other side face of said light-guiding members;
- a light semi-transmitting reflection part arranged between said LED light source and said light diffusion part;
- and
- an optical path changing part arranged above said light-guiding members;
- wherein a side of said light-guiding members that faces said light diffusion part is flat.
A lighting unit comprising:
- a plurality of light-emitting diode (LED) light sources arranged in parallel;
- a plurality of light-guiding members arranged along a direction wherein said LED light sources are arranged;
- a light reflecting part arranged on one side face of said light-guiding members;
- a light diffusion part arranged on an other side face of said light-guiding members;
- a light semi-transmitting reflection part arranged between said LED light source and said light diffusion part;
- and
- an optical path changing part arranged above said light-guiding member;
- wherein a side of said light-guiding members that faces said light diffusion part is flat, and said light guiding members are provided with plural grooves to accommodate said plural LED light sources.
A display apparatus comprising:
- a lighting unit including
- a plurality of light-emitting diode (LED) light sources arranged in parallel,
- a plurality of light-guiding members arranged along a direction wherein said LED light sources are arranged,
- a light reflecting part arranged on one side face of said light-guiding members,
- a light diffusion part arranged on an other side face of said light-guiding members,
- a light semi-transmitting reflection part arranged between said LED light source and said light diffusion part, and
- an optical path changing part arranged above said light-guiding members,
- wherein a side of said light-guiding members that faces said light diffusion part is flat;
- color filters;
- and
- a display panel which is capable of displaying images;
- wherein spectral luminescent characteristics of said LED light sources are included in spectral transmission coefficient characteristics of said color filters.
A display apparatus comprising:
- a lighting unit including
- a plurality of light-emitting diode (LED) light sources arranged in parallel,
- a plurality of light-guiding members arranged along a direction wherein said LED light sources are arranged,
- a light reflecting part arranged on one side face of said light-guiding members,
- a light diffusion part arranged on an other side face of said light-guiding members,
- a light semi-transmitting reflection part arranged between said LED light source and said light diffusion part, and
- an optical path changing part arranged above said light-guiding members,
- wherein a side of said light-guiding members that faces said light diffusion part is flat;
- a display panel which is capable of displaying images;
- and
- a control unit to control an on-off operation of said LED light sources of said lighting unit in synchronism with scanning of said display panel.
Dependencies are inferred from the claim text.