Backlight including light emitting module and light reflective members

1. A backlight comprising:

a light-emitting module comprising:

a base member comprising a conductive pattern;

a plurality of light-emitting devices, each of which is flip-chip bonded on the base member and electrically connected to the conductive pattern, and each of which comprises:

a light-emitting element, and

a dielectric multi-layer film located on an upper surface of the light-emitting element;

a plurality of light reflective members arranged between the plurality of light-emitting elements;

a transparent laminate located above the plurality of light-emitting devices and comprising:

a wavelength converting member adapted to absorb a portion of light from the light-emitting elements and to emit light of a wavelength that is different from an emission wavelength of the light-emitting elements, and

a diffuser plate; and

a reflective member facing a lateral surface of the transparent laminate.

2. The backlight of claim 1 , wherein, in each of the light-emitting devices, the dielectric multi-layer film has a first spectral reflectivity in an emission peak wavelength region of the light-emitting element and a second spectral reflectivity in a region that is located at a longer wavelength side of the emission peak wavelength region by 50 nm, and the second spectral reflectivity is greater by 10% or more than the first spectral reflectivity.

3. The backlight of claim 2 , wherein the first spectral reflectivity is greater than or equal to 70% and less than or equal to 95%.

4. The backlight of claim 2 , wherein, in each of the light-emitting devices, a reflection wavelength band of the dielectric multi-layer film upon vertical incidence includes an emission peak wavelength of the light-emitting element, and a portion of the reflection wavelength band on a longer wavelength side of the emission peak wavelength is wider than a portion of the reflection wavelength band on a shorter wavelength side of the emission peak wavelength.

5. The backlight of claim 2 , wherein 25% or more of a total amount of light emitted from each of the light-emitting devices is emitted at elevation angles of less than 20° with respect to an upper surface of the base member.

6. The backlight of claim 2 ,

wherein each of the light-emitting devices further comprises an encapsulation member covering the light-emitting element and the dielectric multi-layer film, and

wherein, in each of the light emitting devices, a ratio H/W of a height H of the encapsulation member to a width W of the encapsulation member is less than 0.5.

7. The backlight of claim 6 , wherein 40% or more of a total amount of light emitted from each of the light-emitting devices is emitted at elevation angles of less than 20° with respect to an upper surface of the base member.

8. The backlight of claim 7 , wherein, in each of the light emitting devices, the ratio H/W of the height H of the encapsulation member to the width W of the encapsulation member is less than or equal to 0.3.

9. The backlight of claim 1 , wherein a height of each light reflective member is less than or equal to 0.3 times a distance between respective adjacent light-emitting devices.

10. The backlight of claim 1 , wherein a height of each light reflective member is less than or equal to 0.2 times a distance between respective adjacent light-emitting devices.

11. The backlight of claim 1 , further comprising a housing that supports the light-emitting module and the transparent laminate with a predetermined gap therebetween, and supports the reflective member.

12. The backlight of claim 1 ,

wherein, in each of the light-emitting devices, a reflection wavelength band of the dielectric multi-layer film upon vertical incidence includes an emission peak wavelength of the light-emitting element, and a portion of the reflection wavelength band on a longer wavelength side of the emission peak wavelength is wider than a portion of the reflection wavelength band on a shorter wavelength side of the emission peak wavelength,

wherein each of the light-emitting devices further comprises an encapsulation member covering the light-emitting element and the dielectric multi-layer film, and

wherein, in each of the light-emitting devices, a ratio H/W of a height H of the encapsulation member to a width W of the encapsulation member is less than 0.5.

13. The backlight of claim 12 , further comprising a housing that supports the light-emitting module and the transparent laminate with a predetermined gap therebetween, and supports the reflective member.

14. The backlight of claim 1 ,

wherein, in each of the light-emitting devices, a reflection wavelength band of the dielectric multi-layer film upon vertical incidence includes an emission peak wavelength of the light-emitting element, and a portion of the reflection wavelength band on a longer wavelength side of the emission peak wavelength is wider than a portion of the reflection wavelength band on a shorter wavelength side of the emission peak wavelength, and

wherein, in each of the light-emitting devices, a height of the light reflective members is less than or equal to 0.3 times a distance between the light-emitting devices.

15. The backlight of claim 14 , further comprising a housing that supports the light-emitting module and the transparent laminate with a predetermined gap therebetween, and supports the reflective member.

16. The backlight of claim 1 , further comprising:

a housing that supports the light-emitting module and the transparent laminate with a predetermined gap therebetween, and supports the reflective member, and

wherein, in each of the light-emitting devices, a reflection wavelength band of the dielectric multi-layer film upon vertical incidence includes an emission peak wavelength of the light-emitting element, and a portion of the reflection wavelength band on a longer wavelength side of the emission peak wavelength is wider than a portion of the reflection wavelength band on a shorter wavelength side of the emission peak wavelength.

17. The backlight of claim 1 ,

wherein each of the light-emitting devices further comprises an encapsulation member covering the light-emitting element and the dielectric multi-layer film,

wherein, in each of the light-emitting devices, a ratio H/W of a height H of the encapsulation member to a width W of the encapsulation member is less than 0.5, and wherein a height of the light reflective members is less than or equal to 0.3 times a distance between the light-emitting devices.

18. The backlight of claim 17 , further comprising a housing that supports the light-emitting module and the transparent laminate with a predetermined gap therebetween, and the reflective member is supported on the housing.

19. The backlight of claim 1 , further comprising:

a housing that supports the light-emitting module and the transparent laminate with a predetermined gap therebetween, and supports the reflective member,

wherein each of the light-emitting devices further comprises an encapsulation member covering the light-emitting element and the dielectric multi-layer film, and

wherein, in each of the light-emitting devices, a ratio H/W of a height H of the encapsulation member to a width W of the encapsulation member is less than 0.5.

20. The backlight of claim 1 , further comprising:

a housing that supports the light-emitting module and the transparent laminate with a predetermined gap therebetween, and supports the reflective member,

wherein a height of the light reflective members is less than or equal to 0.3 times a distance between the light-emitting devices.