Liquid crystal display device
View Patent ↗A liquid-crystal display device is provided which has a backlight that applies light onto a liquid crystal panel. The backlight includes a light guide having an LED as a light-emitting device. The light guide has recesses on the light incident surface, in which electric elements are disposed. Disposing the electric elements connected to external driving circuit in the backlight can reduce the area for mounting the electric elements.
1. A liquid-crystal display device comprising:
a liquid crystal panel; and
a backlight that applies light onto the liquid crystal panel, wherein
the backlight includes:
a light-emitting device;
a light guide into which the light from the light-emitting device comes;
electric elements; and
a circuit board on which the light-emitting device and the electric elements are mounted, wherein the electric elements are mounted closer to the light guide than to the light-emitting device, and wherein the electric elements are disposed between the light-emitting device and the light guide.
2. The liquid-crystal display device according to claim 1 , wherein
the light-emitting device is a light-emitting diode.
3. The liquid-crystal display device according to claim 1 , wherein
the electric elements include a resistor and a capacitor.
4. A liquid-crystal display device comprising:
a liquid crystal panel; and
a planar lighting unit that applies light onto the liquid crystal panel, wherein
the planar lighting unit includes:
a plurality of light-emitting devices;
a light guide that applies the light from the light-emitting devices onto the liquid crystal panel;
electric elements; and
a circuit board on which the light-emitting devices and the electric elements are mounted; wherein
the light guide has a top face facing the liquid crystal panel and side faces perpendicular to the top face, a side face of which adjacent to the light-emitting devices has recesses, and the electric elements are disposed in the recesses.
5. The liquid-crystal display device according to claim 4 , wherein
the light-emitting devices are light-emitting diodes.
6. The liquid-crystal display device according to claim 4 , wherein
the electric elements include a resistor and a capacitor.
7. A liquid-crystal display device comprising:
a liquid crystal panel; and
a light guide that applies light onto the liquid crystal panel;
a plurality of light-emitting devices that emits light toward the light guide;
resistive elements;
capacitive elements; and
a circuit board on which the light-emitting devices, the resistive elements, and the capacitive elements are mounted, wherein
the light guide has a light incident surface adjacent to the light-emitting devices;
the light-emitting devices are arranged on the circuit board and along a light incident surface of the light guide, the light incident surface having a recess between two adjacent light-emitting devices, the recess being notched in the direction apart from the light-emitting devices; and
the resistive element and the capacitive element are disposed in the recesses.
8. The liquid-crystal display device according to claim 7 , wherein
the light-emitting devices are light-emitting diodes.