Display device

1. A display device comprising:

a first display panel including a light emitting element;

a light condensing element disposed at a side portion of the first display panel;

a light guide plate disposed below the first display panel; and

a reflective plate including a protrusion part having an inclined surface, and the reflective plate including a flat part,

wherein the light condensing element transmits external light to the light guide plate by the inclined surface of the protrusion part, the flat part of the reflective plate reflects external incident light advancing toward a display region through the light guide plate, and the external light is emitted upward.

2. The display device of claim 1 , further comprising a second display panel disposed between the first display panel and the light guide plate, the second display panel including a liquid crystal layer.

3. The display device of claim 1 , further comprising a diffusion plate disposed between a second display panel and the light guide plate.

4. The display device of claim 1 , wherein the reflective plate is disposed below the light guide plate, and includes a metal layer.

5. The display device of claim 4 , wherein

the first display panel includes a data line electrically connected to the light emitting element,

a data signal is applied to the data line to drive the light emitting element of the first display panel,

and

light transmittance of a second display panel is changed by the light emitting element.

6. The display device of claim 4 , wherein

the protrusion part extends from the flat part, and

the protrusion part is disposed to overlap the light condensing element.

7. The display device of claim 6 , wherein the protrusion part receives the external light transmitted from the light condensing element, and reflects the external light toward the light guide plate.

8. The display device of claim 7 , wherein the flat part and the protrusion part are integrally formed.

9. The display device of claim 7 , wherein the light guide plate includes an inclined surface formed between a lower surface of the light guide plate and a side surface of the light guide plate,

wherein the inclined surface of the light guide plate corresponds to the protrusion part extending from the flat part of the reflective plate.

10. The display device of claim 1 , further comprising a color conversion layer disposed to overlap the first display panel and a second display panel,

wherein the color conversion layer includes a color filter.

11. The display device of claim 10 , wherein the color conversion layer is disposed between the first display panel and the second display panel.

12. The display device of claim 11 , wherein the first display panel includes at least one of a red light emitting element emitting red light, a green light emitting element emitting green light, and a blue light emitting element emitting blue light.

13. The display device of claim 10 , wherein the color conversion layer is disposed above the first display panel.

14. The display device of claim 13 , wherein the first display panel includes at least one of a red light emitting element emitting red light, a green light emitting element emitting green light, a blue light emitting element emitting blue light, and a white light emitting element emitting white light.

15. The display device of claim 13 , wherein

the color conversion layer further includes a wavelength conversion member disposed between the first display panel and the color filter, and

the wavelength conversion member includes quantum dots and scattering particles.

16. The display device of claim 15 , wherein the first display panel includes a blue light emitting element emitting blue light.

17. A display device comprising:

a display panel;

a light condensing element disposed at a side portion of the display panel;

a light guide plate disposed below the display panel;

a reflective plate including a protrusion part having an inclined surface, the reflective plate including a flat part; and

a light source disposed adjacent to a side of the light guide plate,

wherein the light condensing element transmits external light to the light guide plate by the inclined surface of the protrusion part, and

the flat part of the reflective plate reflects external incident light advancing toward a display region through the light guide plate, and the external light is emitted upward.

18. The display device of claim 17 , wherein the display panel is a liquid crystal display panel including a liquid crystal layer.

19. The display device of claim 17 , wherein the reflective plate is disposed below the light guide plate.

20. The display device of claim 19 , further comprising a color conversion layer disposed above the liquid crystal display panel,

wherein the color conversion layer includes a color filter.