Luminous source for reading material
A luminous source ( 10 ) for reading material includes a light source ( 20 ), a light guide plate ( 40 ), and a frame ( 60 ). The light guide plate is adjacent the light source, and converts divergent light beams received from the light source into substantially parallel light beams emitting from a main surface ( 42 ) of the light guide plate. The frame defines a support space ( 62 ) and has a switch ( 61 ). The light guide plate and the light source are secured in the support space. The switch electrically connects with the light source and controls switching of the light source on and off. The parallel light beams illuminate a page of the reading material from underneath the page.
1. A luminous source for reading material, comprising:
a light source;
a light guide plate adjacent the light source, for converting light beams from the light source into substantially parallel light beams emitting from a main surface of the light guide plate;
a reflection sheet disposed on a surface of the light guide plate opposite to the main surface; and
a frame defining a support space and having a switch, wherein the light guide plate and the light source are secured in the support space, and the switch electrically connects with the light source and controls switching of the light source on and off.
2. The luminous source as described in claim 1 , wherein the support space is cooperatively defined by a coping, a soleplate and sidewalls of the frame.
3. The luminous source as described in claim 2 , wherein the light guide plate is disposed on the soleplate, and the coping covers all of the light source and an end portion of the light guide plate.
4. The luminous source as described in claim 3 , wherein a size of an exposed portion of the light guide plate is configured to be substantially equal to the size of a page of the reading material.
5. The luminous source as described in claim 3 , further comprising a transparent sheet generally between the light guide plate and the coping.
6. The luminous source as described in claim 5 , further comprising a diffusion sheet between the light guide plate and the transparent sheet.
7. The luminous source as described in claim 2 , wherein the soleplate underlies all of the combination of the light guide plate and the light source.
8. The luminous source as described in claim 7 , wherein the reflection sheet is disposed between the light guide plate and the soleplate.
9. The luminous source as described in claim 2 , wherein the soleplate defines one or more openings therein.
10. The luminous source as described in claim 2 , wherein the coping, the soleplate and the sidewall each have a reflection surface facing the light guide plate.
11. The luminous source as described in claim 2 , wherein the switch is positioned on the coping.
12. The luminous source as described in claim 1 , wherein the light source comprises a light emitting diode and an electricity source supplying power thereto.
13. The luminous source as described in claim 12 , wherein the frame comprises a moveable lid for expedient assembly and disassembly of the light emitting diode and electricity source.
14. The luminous source as described in claim 12 , wherein the light guide plate defines a notch in a side thereof for securing of the light emitting diode therein.
15. The luminous source as described in claim 12 , wherein the light guide plate defines a cutout in a side thereof for securing of the electricity source therein.