JP6708593B2 - Display device - Google Patents

Description

The present technology relates to a display device including a light emitting device suitable for a surface light source.

2. Description of the Related Art A surface emitting device using a blue LED (Light Emitting Diode) is adopted as a backlight or an illuminating device of a liquid crystal display device. For example, in Patent Document 1, a film coated with a fluorescent material is provided on the light emission observation surface (light emission surface) of the light guide plate, and white light is obtained by wavelength-converting the light incident on the light guide plate from the blue LED by the fluorescent material. Is listed. Further, Patent Document 2 describes that a wavelength conversion body in which a fluorescent substance is mixed with an elastic body is provided between the blue LED and the end surface (light incident surface) of the light guide plate.

Patent No. 3116727 Patent No. 3114805

In a light emitting device used as a surface light source, it is generally strongly desired to increase the uniformity of in-plane color (chromaticity).

The present technology has been made in view of such problems, and an object thereof is to provide a display device including a light emitting device with improved in-plane color uniformity.

A display device according to an embodiment of the present technology includes a liquid crystal panel and a light emitting device disposed on the back side of the liquid crystal panel, and each light emitting device converts at least one light source and a wavelength of light emitted from the light source. An optical component having a plurality of light emitting parts having a wavelength conversion member, a light incident surface facing the plurality of light emitting parts, and a light emitting surface facing the back side of the liquid crystal panel and provided perpendicular to the light incident surface. And a structure for preventing color unevenness that suppresses the light of the light source from directly entering the optical component, the wavelength conversion member has a wavelength conversion material containing quantum dots, and the light emission surface of the optical component has unevenness. A pattern is provided, the wavelength conversion member is provided between the light incident surface and the plurality of light sources, and is arranged along the length direction of the light incident surface, and the plurality of light emitting portions are the first light emitting portion and the first light emitting portion. and a second light-emitting unit adjacent to the first light emitting portion, color unevenness prevention structure has a reflection portion disposed between the first light emitting portion and the second light emitting unit, the reflection portion, the first light emitting From the light source that has entered the wavelength conversion member of the light emitting section or the second light emitting unit and has reached the end of the wavelength conversion member without passing through the wavelength conversion material of the wavelength conversion member is reflected toward the wavelength conversion member. It is arranged to do.

In the display device according to an embodiment of the present technology, the amount of light that is incident on the optical component without passing through the wavelength conversion member among the light generated by the light source due to the color unevenness prevention structure is reduced. That is, the wavelength of the light of the light source is converted by the wavelength conversion member and reaches the light incident surface of the optical component.

According to the display device of the present technology, since the structure for preventing color unevenness is provided, it is possible to prevent the color of the light of the light source from coming out significantly stronger than the color of the light that has passed through the wavelength conversion member in the plane. You can Therefore, it is possible to prevent color unevenness and improve in-plane color uniformity.

It is a perspective view showing the whole composition of the light emitting device concerning a 1st embodiment of this art. It is a figure showing the light ray bundle which goes to the light-incidence surface of a light-guide plate from the light source shown in FIG. FIG. 3 is a cross-sectional view for explaining the configuration of the light emitting unit shown in FIG. 1. It is a figure showing the structure of the light-emitting device which concerns on a comparative example. It is a top view showing the light observed from the light-emitting device shown in FIG. FIG. 11 is a plan view illustrating a configuration of a light emitting unit according to Modification 1. It is sectional drawing showing an example of a structure between the holder and the edge part of the container shown in FIG. FIG. 11 is a cross-sectional view illustrating a configuration of a light emitting unit according to Modification 2. It is sectional drawing showing the structure of the light emitting part which concerns on 2nd Embodiment of this technique. FIG. 11 is a cross-sectional view showing a configuration of a light emitting unit according to Modification 3. It is sectional drawing showing the structure of the light emitting part which concerns on 3rd Embodiment of this technique. It is a perspective view showing an example of the appearance of a display device to which the light emitting device shown in FIG. 1 and the like is applied. It is a perspective view which decomposes|disassembles and shows the main-body part shown in FIG. FIG. 14 is a perspective view showing the panel module shown in FIG. 13 in an exploded manner. FIG. 14 is a perspective view illustrating an appearance of application example 1 of the panel module illustrated in FIG. 13. 17 is a perspective view illustrating an appearance of application example 2. FIG. (A) is a perspective view showing an appearance as seen from the front side of Application Example 3, and (B) is a perspective view showing an appearance as seen from the back side. 17 is a perspective view illustrating an appearance of application example 4. FIG. 21 is a perspective view illustrating an appearance of application example 5. FIG. (A) is an open front view of application example 6, (B) is a side view thereof, (C) is a front view in a closed state, (D) is a left side view, (E) is a right side view, (F) is a top view and (G) is a bottom view. It is a perspective view showing an example of the external appearance of the illuminating device to which the light emitting device shown in FIG. 1 etc. is applied. FIG. 22 is a perspective view illustrating another example of the lighting device shown in FIG. 21. FIG. 22 is a perspective view illustrating another example of the lighting device shown in FIG. 21.

Hereinafter, embodiments of the present technology will be described in detail with reference to the drawings. The description will be given in the following order.
1. First Embodiment (Light-Emitting Device: Example Having Reflection Part Between Adjacent Wavelength Conversion Members)
2. Modification 1 (example in which the reflection part is configured by a part of a holder that holds the wavelength conversion member)
3. Modification 2 (example having a light absorption part between adjacent wavelength conversion members)
4. Second embodiment (light emitting device: an example in which a wavelength conversion section is provided between adjacent wavelength conversion members)
5. Modification 3 (example in which a wavelength conversion film that covers the end of the container of the wavelength conversion member is used as the wavelength conversion unit)
6. Third embodiment (light emitting device: an example in which the pitch of light sources between adjacent light emitting sections is wider than the pitch of light sources in one light emitting section)
7. Application example (display device, lighting device)

<First Embodiment>
FIG. 1 shows an overall configuration of a light emitting device (light emitting device 1) according to a first embodiment of the present technology. The light emitting device 1 is used, for example, as a backlight for illuminating a transmissive liquid crystal panel from behind, and includes a light emitting unit 10E including a light source 10 and a wavelength conversion member 30, a light guide plate 20 (optical component), and a reflecting member 40. And an optical sheet 50. The left and right end surfaces of the light guide plate 20 are light incident surfaces 20A, and the main surfaces (the widest surfaces) of the front surface and the back surface are light emission surfaces 20B and 20D. That is, the light emitting device 1 is an edge type light emitting device.

In this specification, the stacking direction of the optical sheet 50, the light guide plate 20, and the reflection member 40 is referred to as the z (front-back) direction, the left-right direction of the main surface of the light guide plate 20 is referred to as the x direction, and the vertical direction is referred to as the y direction.

The light source 10 is, for example, an LED that emits blue light (for example, a wavelength of approximately 430 to 495 nm), and a plurality of light sources 10 are provided facing the light incident surface 20A of the light guide plate 20. More specifically, the light source 10 is sealed in a package (a package 11 shown in FIG. 2, which will be described later) and mounted on the light source substrate 12. The light source substrate 12 supports the light source 10 and supplies power to the light source 10, and has a wiring pattern on, for example, a rectangular glass epoxy substrate, a metal substrate or a flexible substrate. A plurality of light sources 10 are arranged along the longitudinal direction (y direction) of the rectangular light source substrate 12. One light source 10 may be provided, or one light source 10 may be provided on one light source substrate 12 and a plurality of light sources 10 may be arranged.

The wavelength conversion member 30 is provided between the light source 10 and the light incident surface 20A of the light guide plate 20. The wavelength conversion member 30 absorbs light having a wavelength emitted by the light source 10 and then generates light having a different wavelength. That is, the light of the light source 10 is partly or wholly wavelength-converted by the wavelength conversion member 30, and then enters the light incident surface 20A.

FIG. 2 shows an enlarged part of the wavelength conversion member 30. The wavelength conversion member 30 is a tubular container 32 (capillary) made of, for example, glass, in which the wavelength conversion substance 31 is enclosed. The wavelength conversion substance 31 contains, for example, a fluorescent pigment, a fluorescent dye, a quantum dot, or the like, absorbs light from the light source 10, converts it into light of another wavelength, and emits it (see, for example, FIG. 2 light ν1). The wavelength conversion material 31 absorbs, for example, blue light from the light source 10 and converts a part thereof into red light (wavelength 620 to 750 nm) or green light (wavelength 495 to 570 nm). Therefore, when the light from the light source 10 passes through the wavelength conversion material 31, the red, green and blue lights are combined to generate white light. The container 32 has a role of suppressing deterioration of the wavelength conversion substance 31 due to moisture and oxygen in the atmosphere and facilitating handling of the wavelength conversion substance 31.

The wavelength conversion material 31 preferably includes quantum dots. Quantum dots are particles having a major axis of about 1 nm to 100 nm and have discrete energy levels. Since the energy state of the quantum dot depends on its size, the emission wavelength can be freely selected by changing the size. Further, the emitted light of the quantum dots has a narrow spectrum width. The color gamut is expanded by combining the light of such a steep peak. Therefore, by using quantum dots for the wavelength conversion material 31, the color gamut can be easily expanded. Furthermore, the quantum dots have high responsiveness, and the light of the light source 10 can be used efficiently. In addition, stability is high. The quantum dots are, for example, compounds of group 12 elements and group 16 elements, compounds of group 13 elements and group 16 elements, or compounds of group 14 elements and group 16 elements, such as CdSe, CdTe, ZnS, CdS, PdS, PbSe, CdHgTe, or the like.

As shown in FIG. 3(A), one light emitting unit 10E includes one wavelength conversion member 30 and a plurality of light sources 10 that make light incident on it. A plurality of light incident surfaces 20A (for example, the right end surface of the light guide plate 20 in FIG. 3A) are provided so as to face each other. The container 32 (wavelength conversion member 30) extends in the length direction (y direction) of the light incident surface 20A, and the light emitting units 10E are arranged along the extending direction.

When the light incident surface 20A of the light guide plate 20 is the upper and lower end surfaces, a plurality of light emitting units 10E are arranged along the x direction, as shown in FIG. 3B. When the size of the display panel illuminated by the light emitting device 1 is large (for example, 55 inches or more), it is particularly preferable to provide the plurality of light emitting units 10E in this manner in order to maintain the reliability of the container 32. Further, when the light emitting portion 10E is arranged on the long side of the light guide plate 20 having a rectangular plane (FIG. 3(B)), the brightness is improved as compared with the case where it is arranged on the short side (FIG. 3(A)).

In the present embodiment, the reflection part 33 is provided between the adjacent light emitting parts 10E. As will be described later in detail, the reflecting portion 33 constitutes a color unevenness preventing structure, and blocks light that directly goes from the light source 10 to the light incident surface 20A of the light guide plate 20 without passing through the wavelength conversion member 30. ..

The reflection part 33 is provided between the adjacent containers 32, and covers the ends of the two containers 32 by, for example, arcuate recesses (FIG. 2 ). The reflecting portion 33 returns the light ν2 traveling from the light source 10 between the adjacent containers 32 to the wavelength conversion member 30 (wavelength conversion substance 31) side, and is made of a highly reflective material such as white resin or oxidation. It is made of a resin or the like mixed with a metal having a high reflectance such as titanium. As the resin material, for example, PC (polycarbonate), PPA (polyphthalamide), PPA/PCT (polycyclohexylene dimethylene terephthalate), epoxy resin, or the like can be used. The reflection part 33 may be made of metal or the like with high reflection coating. The reflection part 33 is provided between the adjacent containers 32 and between the adjacent light sources 10, and is fixed to a part of the light emitting part 10E such as the light source substrate 12, for example. The reflecting portion 33 may have a cap shape that covers only the end portion of the container 32, or may be separated between one end portion and the other end portion of the end portions of two adjacent container 32. Good.

The light guide plate 20 is mainly configured by including a transparent thermoplastic resin such as a polycarbonate resin (PC) or an acrylic resin, and the light of the light source 10 incident on the light incident surface 20A is emitted from the light emitting surface 20B (FIG. 1). It leads to the main surface on the optical sheet 50 side). In order to improve the straightness of the light propagating in the light guide plate 20, the light emitting surface 20B is provided with, for example, a concavo-convex pattern including fine convex portions 20C. The convex portion 20C is, for example, a strip-shaped protrusion or ridge extending in one direction (x direction in FIG. 1) of the light emitting surface 20B. On the light emitting surface 20D that faces the light emitting surface 20B, for example, a scattering agent is printed in a pattern as a scattering portion that scatters and makes uniform the light propagating in the light guide plate 20. As the scattering portion, a portion containing a filler may be provided instead of the scattering agent, or the surface may be partially roughened.

The reflection member 40 (FIG. 1) is a plate-shaped or sheet-shaped member facing the main surface of the light guide plate 20, and is provided on the light emitting/emission surface 20D side of the light guide plate 20. The reflecting member 40 guides the light leaking from the light source 10 to the light emitting/emitting surface 20D side of the light guide plate 20 and the light emitted from the inside of the light guiding plate 20 to the light emitting/emitting surface 20D side to the light guide plate 20 side. It is something to return. The reflecting member 40 has functions such as reflection, diffusion and scattering, for example. This makes it possible to efficiently use the light from the light source 10 and increase the front brightness.

The reflection member 40 is made of, for example, foamed PET (polyethylene terephthalate), a silver vapor deposition film, a multilayer reflection film, or white PET. When the reflecting member 40 has a function of regular reflection (specular reflection), it is preferable that the surface is subjected to a treatment such as silver vapor deposition, aluminum vapor deposition or multilayer film reflection. When the reflecting member 40 has a fine shape, it is possible to integrally form the fine shape by a method such as hot press molding using a thermoplastic resin or melt extrusion molding. Examples of the thermoplastic resin include acrylic resins such as PC and PMMA (polymethylmethacrylate), polyester resins such as PET, amorphous copolyester resins such as MS (copolymer of methylmethacrylate and styrene), and polystyrene resins. Further, polyvinyl chloride resin and the like can be used. The fine shape may be formed, for example, by applying an energy ray (for example, ultraviolet ray) curable resin on a base material made of PET or glass, and then transferring a pattern onto the resin.

The optical sheet 50 is provided on the light emitting surface 20B side of the light guide plate 20, and includes, for example, a diffusion plate, a diffusion sheet, a lens film, a polarization separation sheet, and the like. FIG. 1 shows only one of the plurality of optical sheets 50. By providing the optical sheet 50, the light emitted from the light guide plate 20 in an oblique direction can be raised in the front direction, and the front brightness can be further increased.

In the light emitting device 1, the light generated by the light source 10 is wavelength-converted by the wavelength conversion member 30 and is incident on the light incident surface 20A of the light guide plate 20. This light travels inside the light guide plate 20, is emitted from the light emitting surface 20B, and passes through the optical sheet 50.

Here, since the reflecting portion 33 is provided between the adjacent light emitting portions 10E, it is possible to suppress the amount of light that is directly incident on the light incident surface 20A of the light guide plate 20 without passing through the wavelength conversion member 30 from the light source 10. it can.

FIG. 4A illustrates a planar configuration of the light emitting device 100 according to the comparative example as viewed from the light emitting surface (xy plane) side. In the light emitting device 100, as in the light emitting device 1, a plurality of light emitting portions 10E are provided so as to face one light incident surface 20A (for example, the lower end surface) of the light guide plate 20.

However, there is no light-shielding structure such as a reflector between the adjacent light emitting units 10E. Since thermal expansion and thermal contraction occur in the container 32 made of glass or the like, the containers 32 cannot be brought into contact with each other and fixed, and a gap (gap 133) is provided between the adjacent containers 32. Further, due to the thickness of the container 32 and the like, there is a portion where the wavelength conversion substance 31 is not enclosed at the end of the container 32. As shown in FIG. 4B, the light incident surface 20</b>A of the light emitting device 100 is adjacent to the light source 10 in addition to the light ν<b>1 that has passed through the wavelength conversion material 31 of the wavelength conversion member 30 from the light source 10. The light ν102 that has passed through the space between the matching containers 32 (wavelength conversion material 31) arrives. The wavelength of the light ν102 is the same as the wavelength of the light generated by the light source 10.

In this case, as shown in FIG. 5, in the light emitting device 100, a strong bluish color unevenness B due to the light ν102 is observed along the side (for example, the upper and lower sides) where the light emitting unit 10E is provided.

On the other hand, in the present embodiment, since the reflecting portion 33 is provided between the adjacent containers 32, the light ν2 (FIG. 2) traveling from the light source 10 to the light emitting portion 10E is wavelength converted by the reflecting portion 33. The wavelength is converted back to the substance 31 side. Therefore, it is possible to prevent the light of the light source 10 from directly reaching the light incident surface 20A of the light guide plate 20 without passing through the wavelength conversion member 30. Therefore, it is possible to suppress the occurrence of color unevenness due to the blue light of the light source 10 and improve the in-plane color uniformity.

As described above, in the present embodiment, since the reflecting portion 33 is provided between the adjacent light emitting portions 10E, the amount of light directly incident on the light incident surface 20A of the light guide plate 20 from the light source 10 is reduced, In-plane color uniformity can be improved.

Hereinafter, modified examples of the above embodiment and other embodiments will be described. In the following description, the same components as those in the above embodiment will be designated by the same reference numerals and the description thereof will be appropriately omitted.

<Modification 1>
FIG. 6 shows a planar configuration of the light emitting device (light emitting device 1A) according to the first modification of the first embodiment as viewed from the light incident surface 20A of the light guide plate 20. In this light emitting device 1A, the reflection portion is configured by a part (partition portion 33) of a holder (holder 34) that holds the wavelength conversion member 30. Except for this point, the light emitting device 1A has the same configuration as the light emitting device 1 of the first embodiment, and the operation and effect thereof are also the same.

The holder 34 has a function of fixing the wavelength conversion member 30 and maintaining the distance between the wavelength conversion member 30 and the light source 10 at a predetermined value. This can prevent the wavelength conversion member 30 and the light source 10 from coming into contact with each other due to, for example, thermal expansion. The holder 34 has, for example, a substantially rectangular parallelepiped shape, and has an opening facing in the light passage direction (x direction) from the light source 10 to the light incident surface 20A. Specifically, the holder 34 includes an upper surface portion 34U and a lower surface portion 34D that sandwich the wavelength conversion member 30 from a direction orthogonal to the extending direction of the container 32, and a pair of side walls 34S that connect the upper surface portion 34U and the lower surface portion 34D. Has been done. The holder 34 has a partition 33A. The partition portion 33A faces the side wall 34S with the container 32 (wavelength conversion member 30) in between, and is arranged between the wavelength conversion members 30 adjacent to each other when the wavelength conversion member 30 is housed in the holder 34. Thereby, the amount of light that is directly incident on the light incident surface 20A of the light guide plate 20 from the light source 10 can be reduced.

The partition portion 33A is provided from the upper surface portion 34U to the lower surface portion 34D, and the portion facing the end portion of the container 32 is formed in, for example, an arc-shaped concave shape to cover the end portion of the container 32. The partition part 33A prevents the adjacent containers 32 from contacting each other, and has the same function as the reflection part 33 of the light emitting device 1, that is, the light from the light source 10 to the adjacent containers 32 is converted into the wavelength conversion member 30 (wavelength). It also has a function of returning to the conversion substance 31) side. The holder 34 having the partition 33A is made of, for example, a resin mixed with a metal having a high reflectance such as titanium oxide. As the resin material, for example, PC (polycarbonate), PPA (polyphthalamide), PPA/PCT (polycyclohexylene dimethylene terephthalate), epoxy resin, or the like can be used. When the container 32 is made of glass, it is preferable to use PPA, which has a thermal expansion coefficient close to that of glass and is advantageous in terms of cost. Specific examples thereof include "Genestar (registered trademark)" manufactured by Kuraray Co., Ltd. The holder 34 may be made of metal or the like having a high reflection coating.

As shown in FIG. 7, it is preferable to provide a buffer member 35 between the end of the container 32 on the side wall 34S side and the holder 34. The cushioning member 35 prevents contact between the container 32 and the holder 34, and presses the container 32 toward the partition 33A to stably maintain the arrangement of the partition 33A and the container 32. For the cushioning member 35, an elastic body such as urethane foam can be used.

<Modification 2>
The light emitting device (light emitting device 1B) according to the second modification of the first embodiment has a light absorbing part (light absorbing part 36) between adjacent light emitting parts 10E as a color unevenness preventing structure. Except for this point, the light emitting device 1B has the same configuration as the light emitting device 1 of the first embodiment, and the operation and effect thereof are also the same.

As shown in FIG. 8, the light absorbing section 36 is provided between the adjacent containers 32, and covers the end of the container 32 by, for example, an arcuate recess. The light absorbing section 36 absorbs and shields the light ν2 traveling from the light source 10 to the space between the adjacent containers 32, and is made of, for example, black PC, PPA, or black urethane foam. Although the light emitting device 1B has a lower luminance than the light emitting device 1, it is possible to improve the color uniformity as compared with the light emitting device 100.

<Second Embodiment>
The light emitting device (light emitting device 2) according to the second embodiment of the present technology has a wavelength converting unit (wavelength converting unit 37) between adjacent light emitting units 10E as a color unevenness preventing structure. Except for this point, the light emitting device 2 has the same configuration as the light emitting device 1 of the first embodiment, and the operation and effect thereof are also the same.

As shown in FIG. 9, the wavelength conversion unit 37 is provided between the adjacent containers 32, and covers the ends of the two containers 32 by, for example, arcuate recesses. The wavelength conversion unit 37 converts the wavelength of the light ν2 traveling from the light source 10 to the space between the adjacent containers 32. Specifically, it absorbs blue light from the light source 10 and emits light having a wavelength different from that of blue light, for example, red light or green light. As a result, the amount of light directly incident on the light incident surface 20A of the light guide plate 20 from the light source 10 can be suppressed, and the color uniformity of the light emitting device 2 can be improved. In addition, since the light generated by the light source 10 can be efficiently used, the brightness can be improved as compared with the first embodiment. The wavelength converter 37 is made of a resin material mixed with a fluorescent material such as a fluorescent pigment or a fluorescent dye. For example, silicone or the like can be used as the resin material. The wavelength converter 37 may be separated between one end and the other end of the ends of the adjacent containers 32.

<Modification 3>
The light emitting device (light emitting device 2A) according to the modified example 3 of the second embodiment has a wavelength conversion film (wavelength conversion film 38) at the end of the container 32 as a wavelength conversion part. Except for this point, the light emitting device 2A has the same configuration as the light emitting device 2 of the second embodiment, and the operation and effect thereof are also the same.

As shown in FIG. 10, the wavelength conversion film 38 covers the end portions of the adjacent containers 32 that face each other. The wavelength conversion film 38 converts the wavelength of the light ν2 traveling between the light source 10 and the adjacent containers 32, like the wavelength conversion unit 37 of the light emitting device 2. For example, a fluorescent paint is applied to the end of the container 32. It is formed by applying to the part.

<Third Embodiment>
The light emitting device (light emitting device 3) according to the third embodiment of the present technology has a color unevenness preventing structure configured by the pitch (pitch P2) of the light sources 10 between the adjacent light emitting units 10E. Except for this point, the light emitting device 3 has the same configuration as the light emitting device 1 of the first embodiment, and the operation and effect are also the same.

As shown in FIG. 11, while the plurality of light sources 10 are arranged at a predetermined pitch P1 (first pitch) in one light emitting section 10E, the two adjacent light emitting sections 10E which are closest to each other are arranged. The two light sources 10 are provided with a pitch P2 (second pitch) wider than the pitch P1. In the present embodiment, this pitch P2 prevents the light of the light source 10 from directly entering the light incident surface 20A of the light guide plate 20.

In this light emitting device 3, the adjacent light sources 10 arranged at the pitch P2 are provided inside the wavelength conversion member 30 as compared with the case where the adjacent light sources 10 are arranged at the same pitch P1 as the other light sources 10. Therefore, most of the light ν2 traveling from the light sources 10 arranged at the pitch P2 between the adjacent wavelength conversion members 30 passes through the wavelength conversion substance 31. Therefore, it is possible to suppress the amount of light that directly goes from the light source 10 to the light incident surface 20A of the light guide plate 20 and improve the color uniformity.

FIG. 12 shows an appearance of a display device 101 to which the light emitting device 1 (or the light emitting devices 1A, 1B, 2, 2A and 3) is applied. The display device 101 is used as, for example, a thin television device, and has a configuration in which a flat plate-shaped main body portion 102 for displaying an image is supported by a stand 103. The display device 101 is used as a stationary type by mounting it on a horizontal surface such as a floor, a shelf, or a table with the stand 103 attached to the main body 102. It can also be used as a wall-mounted type.

FIG. 13 is an exploded view of the main body 102 shown in FIG. The main body 102 has, for example, a front exterior member (bezel) 111, a panel module 112, and a rear exterior member (rear cover) 113 in this order from the front side (viewer side). The front exterior member 111 is a frame-shaped member that covers the peripheral portion of the front surface of the panel module 112, and a pair of speakers 114 is arranged below. The panel module 112 is fixed to the front exterior member 111, and a power supply board 115 and a signal board 116 are mounted on the back surface of the panel module 112 and a mounting bracket 117 is fixed. The mounting bracket 117 is for mounting a wall-mounting bracket, mounting a board or the like, and mounting the stand 103. The rear exterior member 113 covers the back surface and the side surface of the panel module 112.

FIG. 14 is an exploded view of the panel module 112 shown in FIG. The panel module 112 is, for example, from the front side (viewer side), a front housing (top chassis) 121, a liquid crystal panel 122, a frame-shaped member (middle chassis) 90, a light emitting device 1, a rear housing (back chassis). It has a 124, a balancer substrate 125, a balancer cover 126, and a timing control substrate 127 in this order.

The front housing 121 is a frame-shaped metal component that covers the front peripheral portion of the liquid crystal panel 122. The liquid crystal panel 122 includes, for example, a liquid crystal cell 122A, a source substrate 122B, and a flexible substrate 122C such as a COF (Chip On Film) that connects these. The frame-shaped member 90 is a frame-shaped resin component that holds the liquid crystal panel 122 and the optical sheet 50 of the light emitting device 1. The rear housing 124 is a metal component made of iron (Fe) or the like that houses the liquid crystal panel 122, the frame-shaped member 90, and the light emitting device 1. The balancer substrate 125 controls the light emitting device 1, and is mounted on the back surface of the rear housing 124 and covered with the balancer cover 126, as shown in FIG. The timing control board 127 is also mounted on the back surface of the rear housing 124.

In the display device 101, the light from the light emitting device 1 is selectively transmitted by the liquid crystal panel 122 to display an image. Here, as described in the above embodiment, since the light emitting device 1 having improved in-plane color uniformity is provided, the display device 101 can perform high quality display.

Hereinafter, application examples of the panel module 112 as described above to electronic devices will be described. Examples of the electronic device include a television device, a digital camera, a laptop personal computer, a mobile terminal device such as a mobile phone, or a video camera. In other words, the display device can be applied to electronic devices in all fields that display an image signal input from the outside or a video signal generated inside as an image or a video.

(Application example 1)
15A and 15B are external views of an electronic book to which the panel module 112 of the above embodiment is applied. This electronic book has, for example, a display unit 210 and a non-display unit 220, and the display unit 210 is configured by the display device 101 of the above-described embodiment.

(Application example 2)
FIG. 16 shows an appearance of a smartphone to which the panel module 112 of the above-mentioned embodiment is applied. This smartphone has, for example, a display unit 230 and a non-display unit 240, and the display unit 230 is configured by the display device 101 of the above-described embodiment.

(Application example 3)
FIG. 17 shows the appearance of a digital camera to which the panel module 112 of the above embodiment is applied. This digital camera has, for example, a light emitting unit 410 for flash, a display unit 420, a menu switch 430, and a shutter button 440, and the display unit 420 is configured by the display device 101 of the above-described embodiment.

(Application example 4)
FIG. 18 shows an appearance of a notebook personal computer to which the panel module 112 of the above-mentioned embodiment is applied. This notebook personal computer has, for example, a main body 510, a keyboard 520 for inputting characters and the like, and a display unit 530 for displaying an image. This display unit 530 is the display device 101 of the above-described embodiment. It is configured.

(Application example 5)
FIG. 19 shows an appearance of a video camera to which the panel module 112 of the above-mentioned embodiment is applied. This video camera has, for example, a main body 610, a lens 620 for photographing a subject, which is provided on the front side surface of the main body 610, a start/stop switch 630 for photographing, and a display 640. The display unit 640 is composed of the display device 101 of the above embodiment.

(Application example 6)
FIG. 20 shows an appearance of a mobile phone to which the panel module 112 of the above-described embodiment is applied. This mobile phone has, for example, an upper housing 710 and a lower housing 720 connected by a connecting portion (hinge portion) 730, and has a display 740, a sub-display 750, a picture light 760, and a camera 770. There is. The display 740 or the sub-display 750 among these is configured by the display device 101 of the above-described embodiment.

FIG. 21 shows an appearance of a lighting device to which the light emitting device 1 (or the light emitting devices 1A, 1B, 2, 2A and 3) is applied. This lighting device is a lighting device for a table equipped with the light emitting device 1 (or the light emitting devices 1A, 1B, 2, 2A, 3) of the above-described embodiment. For example, a pillar 842 provided on a base 841 The illumination unit 843 is attached. The illumination section 843 is composed of the light emitting devices 1 and 2 according to the first and second embodiments. By illuminating the light guide plate 20, the illuminating section 843 can have any shape such as the cylindrical shape shown in FIG. 21 or the curved shape shown in FIG.

The light emitting device 1 may be applied to an indoor lighting device as shown in FIG. In this lighting device, the lighting unit 844 is configured by the light emitting device 1. The lighting units 844 are arranged on the ceiling 850A of the building with an appropriate number and intervals. The illumination unit 844 can be installed not only on the ceiling 850A but also on any place such as a wall 850B or a floor (not shown) depending on the application.

In these lighting devices, the light from the light emitting device 1 is used for lighting. Here, as described in the above embodiment, since the light emitting device 1 having improved in-plane color uniformity is provided, uniform color light can be obtained.

Although the present technology has been described above with reference to the embodiment and the modified examples, the present technology is not limited to the above-described embodiment, and various modifications can be made. For example, in the above-described embodiments and the like, the case where the light source 10 that emits blue light is used has been described, but the light source 10 may also emit light of another color such as red or green. Further, in the above-described embodiments and the like, the case where white light is generated from blue light by passing through the wavelength conversion member 30 has been described, but light other than white such as orange or red may be obtained.

In addition, although the case where the light incident surface 20A of the light guide plate 20 is the left and right end surfaces has been described in the above embodiment and the like, the light incident surface 20A is one of the four end surfaces (upper, lower, left, and right) surrounding the main surface. The number may be one or three or more. It is also possible to arrange the light source 10 at a position facing the main surface of the light guide plate 20 so that the light emitting device 1 (or the light emitting device 2) is of a direct type. Furthermore, the planar shape of the light guide plate 20 may be any shape other than the rectangular shape as long as it corresponds to the shape of the irradiation target object irradiated by the light emitting device 1. In addition, although the case where the light guide plate 20 is used as an optical component has been described in the above-described embodiments and the like, for example, instead of the light guide plate 20, a structure such as a back chassis of the display device 101 or the like is used to guide light to the optical sheet 50 side. May be guided.

Furthermore, although the case where the light source 10 is an LED has been described in the above-described embodiments and the like, the light source 10 may be configured by a semiconductor laser or the like.

In addition, although the configurations of the light emitting devices 1 and 2, the display device 101 (television device) and the like have been specifically described in the above-described embodiment, it is not necessary to include all the components, and You may further provide a component.

Further, for example, the material and thickness of each part described in the above embodiment are not limited, and other materials and thicknesses may be used.

Note that the present technology may also be configured as below.
(1)
LCD panel,
A light emitting device disposed on the back side of the liquid crystal panel,
The light emitting device,
A plurality of light emitting parts each having at least one light source and a wavelength conversion member for converting the wavelength of light emitted from the light source;
An optical component having a light incident surface facing the plurality of light emitting portions, and a light emitting surface facing the back side of the liquid crystal panel and provided perpendicular to the light incident surface,
A color unevenness preventing structure for suppressing the light of the light source from directly entering the optical component;
The wavelength conversion member has a wavelength conversion material containing quantum dots,
A display device in which a concavo-convex pattern is provided on the light emitting surface of the optical component.
(2)
The display device according to (1), wherein the wavelength conversion substance is enclosed in a tubular container.
(3)
The color unevenness prevention structure is configured by the wavelength conversion section between the adjacent wavelength conversion members,
The display device according to (2), wherein the wavelength conversion unit is a wavelength conversion film that covers each end of the adjacent containers and that includes a fluorescent paint.
(4)
The display device according to (3), wherein the concave-convex pattern of the optical component includes a convex portion.

1, 1A, 1B, 2, 2A, 3... Light emitting device, 10... Light source, 11... Package, 12... Light source substrate, 20... Light guide plate, 20A... Light incident surface, 20B, 20D... Light emitting surface, 20C... Convex Part, 30... Wavelength converting member, 31... Wavelength converting substance, 32... Container, 33... Reflecting part, 34... Holder, 33A... Partition part, 35... Buffer member, 36... Absorbing part, 37... Wavelength converting part, 38... Wavelength conversion film, P1, P2... Pitch, 40... Reflecting member, 50... Optical sheet, 90... Frame member, 101... Display device.

Claims (4)

LCD panel,
A light emitting device disposed on the back side of the liquid crystal panel,
The light emitting device,
A plurality of light emitting units each having at least one light source and a wavelength conversion member that converts the wavelength of light emitted from the light source;
An optical component having a light incident surface facing the plurality of light emitting parts, and a light emitting surface facing the back side of the liquid crystal panel and provided perpendicular to the light incident surface,
A color unevenness preventing structure for suppressing the light of the light source from directly entering the optical component;
The wavelength conversion member has a wavelength conversion material containing quantum dots,
An uneven pattern is provided on the light emitting surface of the optical component,
The wavelength conversion member is provided between the light incident surface and the light source, and is arranged along the length direction of the light incident surface,
The plurality of light emitting units include a first light emitting unit and a second light emitting unit adjacent to the first light emitting unit,
The color unevenness prevention structure has a reflection portion disposed between the first light emitting portion and the second light emitting portion,
The reflecting portion is incident on the wavelength conversion member included in the first light emitting portion or the second light emitting portion, and reaches the end portion of the wavelength conversion member without passing through the wavelength conversion substance of the wavelength conversion member. A display device arranged so as to reflect light from a light source toward the wavelength conversion member . The display device according to claim 1, wherein the plurality of wavelength conversion members are arranged along the length direction of the light incident surface while being separated from each other. The display device according to claim 1, wherein the wavelength conversion substance is enclosed in a tubular container. The display device according to claim 1 , wherein the uneven pattern of the optical component includes a convex portion.

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