Visual display device
View Patent ↗A lighting device especially suitable for automotive center-high-mounted-stop-light (CHMSL) and brake light applications is provided. The lighting device comprises a display panel having at least two interfaces therein, with at least one interface configured as a light reflective interface and at least one interface configured as a light emitting interface. At least a portion of light from a light source propagates through the display panel into contact with the light reflective interface and is reflected by the light reflective interface towards the light emitting interface using total internal reflection.
1. A lighting device for a motor vehicle comprising:
at least one light source providing light;
a display panel of unitary construction having a surface area and comprising at least two interfaces therein, at least one interface configured as a light reflective interface and at least one interface configured as a light emitting interface including a receptacle for said light source and wherein said light source is not in direct contact with said display panel;
wherein at least a portion of the surface area of the display panel not configured as a light emitting interface and surrounding the light source exhibits an overall concave shape with respect to the light source;
wherein at least a portion of the light from the light source propagates through the display panel into contact with the light reflective interface and is reflected by the light reflective interface towards the light emitting interface;
wherein the light reflective interface comprises a plurality of convex features with respect to the light; and
wherein an air space exists between the light source and the display panel.
2. The lighting device for a motor vehicle of claim 1 wherein the light reflected by the light reflective interface towards the light emitting interface occurs using total internal reflection.
3. The lighting device for a motor vehicle of claim 1 wherein the lighting device comprises a center high mounted stop light.
4. The lighting device for a motor vehicle of claim 1 wherein the light reflective interface is unitary with the display panel.
5. The lighting device for a motor vehicle of claim 1 wherein the light emitting interface is unitary with the display panel.
6. The lighting device for a motor vehicle of claim 1 wherein the display panel comprises plastic.
7. The lighting device for a motor vehicle of claim 1 wherein the display panel comprises glass.
8. The lighting device for a motor vehicle of claim 1 wherein the display panel is uncolored.
9. The lighting device for a motor vehicle of claim 1 wherein the display panel is transparent.
10. The lighting device for a motor vehicle of claim 1 wherein the light source comprises at least one light emitting diode.
11. The lighting device for a motor vehicle of claim 1 wherein the light comprises white light or red light.
12. The lighting device for a motor vehicle of claim 1 wherein the light source is attached to a carrier and the carrier is attached to the display panel.
13. The lighting device for a motor vehicle of claim 1 wherein at least 50% of the light from the light source propagating into the display panel emits from the light emitting interface.