Planar lighting device
A display device including a lower cover; a circuit substrate on the lower cover; a plurality of light sources disposed on a first portion of the circuit substrate; a reflection layer disposed on a second portion of the circuit substrate; a first adhesive disposed between the second portion of the circuit substrate and the reflection layer; a light regulator including light regulating patterns disposed in the reflection layer; and an optical sheet disposed on the light sources.
1. A display device comprising:
a liquid crystal panel;
a backlight unit providing light to the liquid crystal panel; and
a lower cover,
wherein the backlight unit is disposed between the liquid crystal panel and the lower cover, and
wherein the backlight unit includes:
a circuit substrate on the lower cover;
a plurality of light sources disposed on the circuit substrate, wherein the plurality of light sources are mounted on the circuit substrate by surface-mounting;
a reflection layer disposed on the circuit substrate;
a first adhesive disposed between the circuit substrate and the reflection layer;
a light regulator including light regulating patterns disposed in the reflection layer, wherein the light regulating patterns change in size according to a position relative to the plurality of light sources; and
an optical sheet disposed on the plurality of light sources.
2. The display device of claim 1 , wherein the first adhesive is disposed between an upper surface of the circuit substrate and a lower surface of the reflection layer.
3. The display device of claim 1 , wherein the lower cover includes a mount groove, and wherein the circuit substrate is disposed in the mount groove.
4. The display device of claim 1 , further comprising a second adhesive between the circuit substrate and the lower cover.
5. The display device of claim 1 , further comprising a spacer between the reflection layer and the optical sheet.
6. The display device of claim 5 , wherein the spacer functions to maintain a gap between the optical sheet and the plurality of light sources.
7. The display device of claim 5 , wherein the spacer functions to reflect light from the plurality of light sources.
8. The display device of claim 5 , wherein the spacer is mounted by applying a third adhesive to the spacer.
9. The display device of claim 1 , wherein the light regulating patterns have a circular shape.
10. The display device of claim 1 , wherein at least two circuit substrates are disposed on the lower cover and are spaced apart by a predetermined distance.
11. The display device of claim 1 , wherein a density of the light regulating patterns close to the plurality of light sources is greater than a density of the light regulating patterns far from the plurality of light sources.
12. A display device comprising:
a liquid crystal panel;
a backlight unit providing light to the liquid crystal panel; and
a lower cover,
wherein the backlight unit is disposed between the liquid crystal panel and the lower cover,
wherein the backlight unit includes:
a circuit substrate on the lower cover;
a plurality of light sources disposed on the circuit substrate, wherein the plurality of light sources are mounted on the circuit substrate by surface-mounting;
a reflection layer disposed on the circuit substrate;
an adhesive disposed between the circuit substrate and the reflection layer, wherein the circuit substrate and the reflection layer are indirectly and partially connected through the adhesive;
an optical sheet disposed on the plurality of light sources; and
a spacer forming a gap between the reflection layer and the optical sheet, and
wherein the reflection layer includes a spacing where a respective light source of the plurality of light sources is placed.
13. The display device of claim 12 , wherein the adhesive is disposed between an upper surface of the circuit substrate and a lower surface of the reflection layer.
14. The display device of claim 12 , wherein the lower cover includes a mount groove, and wherein the circuit substrate is disposed in the mount groove.
15. The display device of claim 12 , wherein the spacer functions to maintain a distance between the optical sheet and the plurality of light sources.
16. The display device of claim 12 , wherein the spacer functions to reflect light from the plurality of light sources.
17. The display device of claim 12 , further comprising a light regulator including light regulating patterns disposed in the reflection layer.
18. The display device of claim 17 , wherein the light regulating patterns have a circular shape.