Display device having reflecting sheet with plurality of dot areas reducing reflectivity of the reflecting sheet

Patent metadata

Field	Value
Publication number	US-11566776-B2
Application number	US-202017108206-A
Country	US
Kind code	B2
Filing date	Dec 1, 2020
Priority date	Oct 31, 2014
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A display device includes a display panel; a frame at a rear of the display panel, the frame including a bottom and a sidewall extending from the bottom; a substrate on the frame; a light source mounted on the substrate; a lens mounted on the light source in which the lens includes an upper surface, a lower surface, and a side surface connected with the upper surface and the lower surface; a reflecting layer between the substrate and the lens; and a plurality of dots formed on a top surface of the reflecting layer. Further, the lower surface of the lens includes a groove in which the light source is inserted, and the plurality of dots is arranged around the light source and only in an area under the lens between the side surface and the groove.

First claim

What is claimed:

1. A display device comprising:
a display panel;
a frame at a rear of the display panel, the frame including a bottom and a sidewall extending from the bottom;
a substrate on the frame;
a light source mounted on the substrate, a part of light from the light source emitting in a radial direction of a circle around the light source;
a lens mounted on the light source, wherein the lens includes an upper surface, a lower surface, a side surface connected with the upper surface and the lower surface, and legs fixed on the substrate;
a reflecting layer between the substrate and the lens; and
a plurality of dots formed on a top surface of the reflecting layer,
wherein the lower surface of the lens includes a groove in which the light source is inserted,
wherein the plurality of dots is arranged around the light source and only in an area under the lens between the side surface and the groove, and
wherein at least some of the plurality of dots are disposed to form a fan shape comprising a first fan shape extending along a first arc and intersecting the radial direction, and a second fan shape extending along a second arc and intersecting the radial direction,
wherein the fan shape is partially circled around at least one of the legs of the lens, and
wherein each of the first arc and the second arc is less than a semicircular arc such that an arc area between the plurality of dots on the reflecting layer along a circle of the first arc or the second arc is empty of dots.

2. The display device of claim 1 , wherein the lower surface of the lens includes a lower surface concave portion around the groove.

3. The display device of claim 2 , wherein the lens includes an upper surface concave portion on the upper surface of the lens, and
wherein the upper surface concave portion of the upper surface of the lens has a funnel shape.

4. The display device of claim 2 , wherein the lens includes an upper surface concave portion on the upper surface of the lens, and
wherein the upper surface of the lens reflects at least a first part of light emitted from the light source toward the sidewall of the frame through the side surface of the lens.

5. The display device of claim 2 , wherein the lens includes an upper surface concave portion on the upper surface of the lens, and
wherein the upper surface of the lens refracts at least a first part of light emitted from the light source toward the sidewall of the frame.

6. The display device of claim 1 , wherein the plurality of dots changes a reflectance of the reflecting layer under the lens.

7. The display device of claim 6 , wherein the plurality of dots reduces a reflectance of the reflecting layer under the lens.

8. The display device of claim 1 , wherein the plurality of dots reduces a reflectance of light from the light source under the lens.

9. The display device of claim 1 , wherein the plurality of dots is arranged at regular intervals in a circumferential direction on the top surface of the reflecting layer.

10. The display device of claim 1 , wherein the plurality of dots includes a first dot area and a second dot area, the first dot area forming the fan shape,
wherein the second dot area is positioned nearer the groove of the lower surface of the lens than the first dot area, and
wherein a size of the first dot area is greater than a size of the second dot area.

11. The display device of claim 10 , wherein the first dot area forms a dot pattern in regular intervals, and
wherein the second dot area forms a dot pattern in regular intervals.

12. The display device of claim 10 , wherein the first dot area and the second dot area are separated from each other.

13. The display device of claim 1 , wherein the first fan shape is opposite to the second fan shape.

14. The display device of claim 1 , wherein the reflecting layer is fixed on the substrate.

15. The display device of claim 1 , wherein the side surface of the lens has a cylindrical shape between the upper surface and the lower surface.

16. The display device of claim 1 , wherein a diameter of the upper surface of the lens is smaller than a diameter of the lower surface of the lens.

17. A display device comprising:
a display panel;
a frame at a rear of the display panel, the frame including a bottom and a sidewall extending from the bottom;
a substrate on the frame;
a light source mounted on the substrate, a part of light from the light source emitting in a radial direction of a circle around the light source;
a reflective lens mounted on the light source, wherein the reflective lens includes an upper surface having an upper surface concave portion, a lower surface facing the upper surface, a side surface connected with the upper surface and the lower surface, and legs fixed on the substrate;
a reflecting layer between the substrate and the reflective lens; and
a plurality of dots formed on a top surface of the reflecting layer and configured to change a reflectance of the reflecting layer under the reflective lens,
wherein the lower surface of the reflective lens includes a groove in which the light source is inserted and a lower surface concave portion around the groove,
wherein the plurality of dots is arranged around the light source and only in an area under the reflective lens between the groove and the side surface of the reflective lens, and
wherein at least some of the plurality of dots are disposed to form a fan shaped area fan shape comprising a first fan shape extending along a first arc and intersecting the radial direction, and a second fan shape extending along a second arc and intersecting the radial direction,
wherein the fan shape is partially circled around at least one of the legs of the lens, and
wherein each of the first arc and the second arc is less than a semicircular arc such that an arc area between the plurality of dots on the reflecting layer along a circle of the first arc or the second arc is empty of dots.

18. The display device of claim 17 , wherein the plurality of dots is arranged at regular intervals in a circumferential direction on the top surface of the reflecting layer.

19. The display device of claim 17 , wherein the upper surface of the reflective lens reflects at least a first part of light emitted from the light source toward the sidewall of the frame through the side surface of the reflective lens.

20. The display device of claim 17 , wherein the plurality of dots includes a first dot area and a second dot area, the first dot area forming the fan shaped area fan shape,
wherein the second dot area is positioned nearer the groove of the lower surface of the reflective lens than the first dot area, and
wherein a size of the first dot area is greater than a size of the second dot area.

21. The display device of claim 20 , wherein the first fan shape is opposite to the second fan shape.

22. The display device of claim 20 , wherein the first dot area forms a dot pattern in regular intervals.

23. The display device of claim 20 , wherein the second dot area forms a dot pattern in regular intervals.

24. The display device of claim 20 , wherein the first dot area and the second dot area are separated from each other.

25. The display device of claim 17 , wherein the reflecting layer is fixed on the substrate.

26. The display device of claim 17 , wherein a diameter of the upper surface of the reflective lens is smalle

Assignees

• Lg Electronics Inc

Inventors

• Oh Sewon
• Kim Eunseok

Classifications

• G02F1/133605 Primary

  including specially adapted reflectors · CPC title

• G02F1/133611

  including means for improving the brightness uniformity · CPC title

• F21Y2115/10

  Light-emitting diodes [LED] · CPC title

• G02F1/133607

  the light controlling member including light directing or refracting elements, e.g. prisms or lenses · CPC title

• G02F1/133603 Primary

  with LEDs · CPC title