Light panel illuminated by light emitting diodes

• US 20050219860A1
• Filed: 03/29/2005
• Published: 10/06/2005
• Est. Priority Date: 03/31/2004
• Status: Active Grant

• Current Assignee: Craig J. Schexnaider
• Original Assignee: Craig J. Schexnaider
• Inventors: Schexnaider, Craig J.
• Granted Patent: US 7,374,327 B2
• Time in Patent Office: Days
• US Class Current: 362/601
• CPC Class Codes: F21S 10/02 changing colors F21S10/002 - F21S10/007, F21S10/04 take precedence
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21S 9/022 Emergency lighting devices
• CPC Class Codes: F21V 2200/20 of light guides of a generally planar shape
• CPC Class Codes: F21V 2200/30 of light guides doped with fluorescent agents
• CPC Class Codes: F21V 23/0435 activated by remote control means
• CPC Class Codes: F21Y 2105/00 Planar light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses
• CPC Class Codes: G02B 6/0055 Reflecting element, sheet or layer
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

A flat planar light fixture formed of a translucent panel with suitable opacity for the transmission of light is illuminated by a plurality of high brightness LEDs disposed along the edges thereof. A layer of reflective material on a back surface of the panel facilitates reflection and dispersion of light that occurs within the panel through a front surface thereof. The LEDs are powered by low-voltage direct current and coupled with an emergency backup battery that is maintained in a charged condition by household current. The light fixture may be operatively connected with a signal receiver that controls the light intensity and turns the LEDs on and off responsive to signals transmitted from a remote signal transmitter. The LEDs may be provided in different colors to allow the user to vary the color of illumination. The light fixture may also be operatively connected with an alarm system.

Claims

1. A light fixture illuminated by light emitting diodes, comprising:

a generally flat planar panel formed of translucent material having sufficient opacity for the transmission of light, said panel having a front surface, a back surface, and opposed peripheral side edges;

a plurality of high brightness light emitting diodes disposed along at least one of said peripheral side edges in longitudinally spaced apart relation for transmitting light into said panel;

a layer of reflective material on at least said back surface of said panel to facilitate reflection and dispersion of light that occurs within said panel through its said front surface;

a frame surrounding said outer peripheral side edges of said panel and enclosing said light emitting diodes;

said light emitting diodes electrically connected with a low voltage direct current rectifier or driver that is connected with standard household alternating current to rectify and supply polarized constant direct current to the light emitting diodes;

wherein

light from said light emitting diodes is transmitted into the panel material from at least one of said peripheral side edges and reflected internally therein causing the light to be emitted through said front surface under the influence of internal reflection.

2. The light fixture according to claim 1, further comprising:

a rechargeable backup battery connected with said direct current rectifier or driver and the standard household alternating current to be constantly charged thereby to provide power to the light emitting diodes in the event of a power failure.

3. The light fixture according to claim 1, further comprising:

a remote control signal receiver connected with said direct current rectifier or driver to control the operation of said light emitting diodes in response to control signals transmitted by a remote control signal transmitter, and thereby allow said light emitting diodes to be turned on and off and the light intensity thereof to be selectively controlled from a remote location.

4. The light fixture according to claim 1, wherein

said plurality of high brightness light emitting diodes are disposed at an angle with respect to said panel front surface.

5. The light fixture according to claim 1, wherein

said high brightness light emitting diodes comprise a plurality of high brightness light emitting diodes that emit light in various different colors;

whereby

various color groups of light emitting diodes are selectively turned on or off or dimmed to produce different colors and hues of illumination and achieve customized and dynamic lighting effects.

6. The light fixture according to claim 5, wherein

said high brightness light emitting diodes are electrically connected with an alarm device;

whereby

various color groups of light emitting diodes are selectively turned on or off to produce different colors or hues responsive to activation of the alarm device to provide a visual alarm signal in the event of an emergency situation.

7. The light fixture according to claim 1, further comprising:

a layer of reflective material on said opposed peripheral side edges to facilitate reflection and dispersion of light that occurs within said panel through its said front surface.

8. The light fixture according to claim 1, wherein

said panel front surface is smooth and polished for optimal transmission of light.

9. The light fixture according to claim 1, wherein

said panel is formed of translucent material containing a sufficient amount of phosphor material to facilitate radiation of absorbed light that occurs within said panel through its said front surface.

10. The light fixture according to claim 1, wherein

either of said panel front surface and back surface is provided with an uneven surface finish to facilitate diffusion of light that occurs within said panel.