Light-emitting unit and display

1. A light-emitting unit, comprising:

a light-guide section having a light entering surface; and

a plurality of light sources opposed to the light entering surface of the light-guide section and arrayed in a first direction, and each having an anisotropy in emission intensity, wherein

a pattern shape of light applied from any of the light sources to the light entering surface has a shape anisotropy, and

the light sources are each disposed to allow a longitudinal direction of the pattern shape to be inclined relative to the first direction.

2. The light-emitting unit according to claim 1 , wherein

the light sources comprise two or more types of light sources, the two or more types of light sources being different from each other in ratio of a minimum value of a half-value angle in emission light to a maximum value of the half-value angle, and

the two or more light sources are disposed to allow a first inclination angle of the longitudinal direction relative to the first direction to be larger as the ratio is smaller.

3. The light-emitting unit according to claim 1 , wherein the light sources are disposed to allow optical axes of the respective light sources to be inclined relative to a second direction, the second direction being perpendicular to the light entering surface.

4. The light-emitting unit according to claim 3 , wherein

the light sources comprise two or more types of light sources, the two or more types of light sources being different from each other in ratio of a minimum value of a half-value angle in emission light to a maximum value of the half-value angle, and

the two or more light sources are disposed to allow a second inclination angle of each of the optical axes relative to the second direction to be larger as the ratio is smaller.

5. The light-emitting unit according to claim 2 , wherein the two or more types of light sources each comprise a laser diode, the laser diode being configured to emit color light of one of red, green, and blue.

6. The light-emitting unit according to claim 1 , wherein the following expression (1) is satisfied:

2 *L 1 *tan θ a *sin θ r≦t   (1)

where L 1 is a distance between one of the light sources and the light-guide section, θa is a maximum value of a half-value angle in emission light of one of the light sources, θr is a first inclination angle of the longitudinal direction relative to the first direction, and t is a thickness of the light-guide section.

7. The light-emitting unit according to claim 1 , wherein the following expressions (2) to (4) are satisfied for light sources, in the light sources, that are equal to each other in ratio of a minimum value of a half-value angle in emission light to a maximum value of the half-value angle:

P 1 /2/tan θ 2 <L 2   (2)

θ 2 =sin −1 (sin θ 1 /n )  (3)

θ 1 =tan −1 (tan θ a *cos θ r )  (4)

where L 2 is a distance from the light entering surface of the light-guide section to an effective utilization region, P 1 is an interval between the light sources that are equal in ratio of the minimum value of the half-value angle to the maximum value of the half-value angle to each other, n is a refractive index of the light-guide section, θa is the maximum value of the half-value angle in the emission light of one of the light sources, and θr is a first inclination angle of the longitudinal direction relative to the first direction.

8. The light-emitting unit according to claim 7 , wherein the distance L 2 from the light entering surface of the light-guide section to the effective utilization region is equivalent to ⅓ of a light-guide length of the light-guide section.

9. The light-emitting unit according to claim 1 , wherein the light-guide section comprises a plate-shaped member including a pair of main surfaces opposed to each other, one of the main surfaces being a light exiting surface and the other of the main surfaces being the light entering surface.

10. The light-emitting unit according to claim 9 , wherein

the light-guide section comprises a first light-guide section and a second light-guide section that are stacked, and

a light entering surface of the first light-guide section and a light entering surface of the second light-guide section are disposed to prevent mutual overlapping thereof in a direction of the stack.

11. The light-emitting unit according to claim 10 , wherein the light sources comprise a first light source disposed to oppose the light entering surface of the first light-guide section and a second light source disposed to oppose the light entering surface of the second light-guide section, the first light source and the second light source being disposed on respective axes different from each other in a plane parallel to a light emission plane.

12. The light-emitting unit according to claim 1 , further comprising a wavelength conversion sheet disposed to oppose a light exiting surface of the light-guide section,

wherein each of the light sources comprises a laser diode configured to emit blue light.

13. The light-emitting unit according to claim 1 , wherein the light sources comprise a laser diode and a light-emitting diode.

14. A display provided with a display panel and a light-emitting unit configured to illuminate the display panel, the light-emitting unit comprising:

a light-guide section having a light entering surface; and

a plurality of light sources opposed to the light entering surface of the light-guide section and arrayed in a first direction, and each having an anisotropy in emission intensity, wherein

a pattern shape of light applied from any of the light sources to the light entering surface has a shape anisotropy, and

the light sources are each disposed to allow a longitudinal direction of the pattern shape to be inclined relative to the first direction.