WO2018008064A1 - Dispositif source de lumière et dispositif d'affichage - Google Patents

Dispositif source de lumière et dispositif d'affichage Download PDF

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Publication number
WO2018008064A1
WO2018008064A1 PCT/JP2016/069797 JP2016069797W WO2018008064A1 WO 2018008064 A1 WO2018008064 A1 WO 2018008064A1 JP 2016069797 W JP2016069797 W JP 2016069797W WO 2018008064 A1 WO2018008064 A1 WO 2018008064A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
wavelength conversion
source device
conversion unit
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Application number
PCT/JP2016/069797
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English (en)
Japanese (ja)
Inventor
榊　陽一郎
Original Assignee
堺ディスプレイプロダクト株式会社
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Publication date
Application filed by 堺ディスプレイプロダクト株式会社 filed Critical 堺ディスプレイプロダクト株式会社
Priority to PCT/JP2016/069797 priority Critical patent/WO2018008064A1/fr
Publication of WO2018008064A1 publication Critical patent/WO2018008064A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape

Definitions

  • the present invention relates to a light source device and a display device including the light source device.
  • the white light source includes, for example, a light emitting diode (LED) that emits blue light and a wavelength conversion unit that converts the frequency of the blue light in one package.
  • the wavelength converter includes, for example, a wavelength converter (for example, a light emitter) that converts the wavelength of blue light into the wavelength of yellow light.
  • the white light source emits mixed light (white light) of blue light and yellow light converted by the wavelength converter to the outside of the package.
  • Quantum dots have the advantage that light with high color purity can be obtained, and the advantage that the wavelength after conversion can be easily selected by changing the size of the quantum dots.
  • the quantum dots may be deteriorated by receiving heat generated by the LEDs.
  • Patent Document 1 discloses a direct light source device including a sheet-like wavelength conversion unit including quantum dots.
  • this light source device since the light source and the wavelength conversion unit are spaced apart from each other, deterioration of the quantum dots due to heat is suppressed.
  • the wavelength converter has a sheet shape covering a plurality of light sources and has a large area. Therefore, the amount of quantum dots included in the wavelength conversion unit is large. In general, since the quantum dots are expensive, the manufacturing cost of the light source device including the sheet-like wavelength conversion unit increases.
  • the above problems are not limited to quantum dots, and can also occur when using an expensive luminescent material that is weak against heat.
  • the present invention has been made in view of such circumstances, and a main object thereof is to provide a light source device and a display device that can suppress deterioration of the wavelength converter due to heat and can reduce the amount of the wavelength converter used. is there.
  • the light source device includes a plurality of light sources, each of which covers a part of the plurality of light sources at a predetermined interval, and enters light emitted from the part of the light sources.
  • a plurality of optical members having a light surface and a light exit surface provided outside the light incident surface when viewed from the part of the light source, and emitting internally diffused light from the light exit surface; And a wavelength conversion unit that is provided in contact with a part of the light exit surface of the member and converts the frequency of light.
  • the display device includes the light source device according to the present embodiment and a display panel illuminated by the light source device.
  • the present invention it is possible to provide a light source device and a display device that can suppress deterioration of the wavelength converter due to heat and can reduce the amount of the wavelength converter used.
  • FIG. 1 is a cross-sectional view schematically showing a configuration of a display device according to Embodiment 1.
  • FIG. 2 is a cross-sectional view schematically showing a main configuration of the light source device according to Embodiment 1.
  • FIG. FIG. 6 is a cross-sectional view schematically showing a main configuration of a light source device according to a second embodiment.
  • FIG. 10 is a cross-sectional view schematically showing a main configuration of a light source device according to Embodiment 3.
  • FIG. 6 is a cross-sectional view schematically showing a main configuration of a light source device according to Embodiment 4.
  • FIG. 10 is a cross-sectional view schematically showing a main configuration of a light source device according to Embodiment 5.
  • FIG. 1 is a cross-sectional view schematically showing the configuration of the display device 1 according to the first embodiment.
  • FIG. 2 is a cross-sectional view schematically showing a main configuration of the light source device 2 according to the first embodiment.
  • the display device 1 includes a display panel 11 and a light source device 2.
  • the display panel 11 is a light transmissive liquid crystal display panel.
  • the light source device 2 includes a box 21, a plurality of light sources 22, a plurality of optical members 23, a reflection sheet 24, a diffusion plate 25, and a light source substrate 26.
  • the box 21 has a bottom wall 211 and a peripheral wall 212.
  • Each light source 22 is, for example, an LED that emits blue light.
  • the light source 22 is mounted on the mounting surface of the light source substrate 26 with the light emitting surface 221 facing upward.
  • the light source substrate 26 on which the plurality of light sources 22 are mounted is attached to the bottom wall 211 so that the light emitting surface 221 of each light source 22 faces the opening side of the box body 21, that is, the display panel 11 side.
  • Each optical member 23 covers a part of the plurality of light sources 22 at a predetermined interval.
  • each optical member 23 covers one light source 22.
  • Each optical member 23 is provided on the outside with respect to the light incident surface as viewed from the corresponding light source, and a light incident surface for entering light emitted from the light source 22 (hereinafter also referred to as a corresponding light source) covered by the optical member 23.
  • Each optical member 23 has light diffusibility and emits light diffused inside from the light exit surface.
  • the optical member 23 is made of, for example, a synthetic resin.
  • the optical member 23 has a predetermined space inside, and one light source 22 is disposed in the space.
  • the optical member 23 includes a bottom wall 31 and a side wall 32 erected from the periphery of the bottom wall 31, and is in a space surrounded by the inner surface 311 of the bottom wall 31 and the inner surface 321 of the side wall 32.
  • One light source 22 is disposed in each.
  • the shape of the bottom wall 31 in plan view is, for example, a circle, an ellipse, or a rectangle.
  • the optical member 23 has a bottomed cylindrical shape.
  • the inner surface 311 of the bottom wall 31 and the outer surface 312 of the bottom wall 31 are flat surfaces parallel to each other, for example.
  • the optical member 23 is attached to the mounting surface of the light source substrate 26.
  • the optical member 23 is attached to the mounting surface so that the end portion of the side wall 32 (the end portion on the side far from the bottom wall 31) abuts the mounting surface of the light source substrate 26.
  • the optical member 23 covers the light source 22 so that the inner surface 311 of the bottom wall 31 faces the light source 22.
  • the optical axis of the light source 22 is orthogonal to the inner surface 311 of the bottom wall 31.
  • the shape of the optical member 23 is not limited to the shape described above.
  • the optical member 23 has a plurality of leg portions extending from the end portion of the side wall 32 (the end portion on the side far from the bottom wall 31), and is mounted so that the leg portions abut on the mounting surface of the light source substrate 26. It may be attached to a surface. That is, a gap may be provided between the end of the side wall 32 and the light source substrate 26.
  • the inner surface 311 of the bottom wall 31 and the inner surface 321 of the side wall 32 are light incident surfaces of the optical member 23.
  • the light emitted from the light source 22 enters the optical member 23 from the light incident surface.
  • the outer surface 312 of the bottom wall 31 and the outer surface 322 of the side wall 32 are light exit surfaces of the optical member 23.
  • the light that has entered the inside of the optical member 23 is diffused and emitted from the light exit surface of the optical member 23 to the outside of the optical member 23.
  • a recess 33 is provided in a region facing the light emitting surface 221 of the corresponding light source on the light emitting surface of the optical member 23 (specifically, the outer surface 312 of the bottom wall 31).
  • the bottom surface of the recess 33 is, for example, a flat surface parallel to the inner surface 311 and the outer surface 312 of the bottom wall 31.
  • the concave portion 33 is filled with the wavelength converting portion 41 and the sealing portion 42.
  • the wavelength conversion unit 41 has a layer shape covering the bottom surface of the recess 33. That is, the wavelength conversion unit 41 is provided in contact with the bottom surface of the recess 33 that is a part of the light output surface of the optical member 23.
  • the wavelength conversion unit 41 includes, for example, two types of quantum dots (wavelength conversion body) and a translucent material (for example, titanium oxide) that carries the quantum dots.
  • quantum dots wavelength conversion body
  • a translucent material for example, titanium oxide
  • One type of quantum dot converts the frequency of blue light into the frequency of red light.
  • Other types of quantum dots convert blue light frequency to green light frequency.
  • the sealing unit 42 reflects the light incident on the wavelength conversion unit 41 toward the optical member 23 and seals the wavelength conversion unit 41.
  • the sealing portion 42 has a layered shape laminated on the wavelength conversion portion 41 and closes the opening of the recess 33.
  • the sealing part 42 is made of, for example, metal, specifically an aluminum thin film, and has high light reflectivity. As described above, the wavelength conversion unit 41 is sealed by the sealing unit 42, thereby preventing the quantum dots from being deteriorated due to the wavelength conversion unit 41 being exposed to oxygen or moisture.
  • the reflection sheet 24 has high light reflectivity.
  • the reflection sheet 24 covers the inner surface of the box 21 and the portion of the mounting surface of the light source substrate 26 where the optical member 23 is not provided.
  • the diffusion plate 25 has light diffusibility.
  • the diffusion plate 25 is made of, for example, a synthetic resin.
  • the diffusion plate 25 is attached to the peripheral wall 212 of the box body 21 so as to close the opening of the box body 21 from the inside of the box body 21.
  • the peripheral wall 212 is provided with a step portion that supports the peripheral portion of the diffusion plate 25.
  • Blue light emitted from the light source 22 enters the optical member 23 from the light incident surface of the optical member 23.
  • Part of the blue light that has entered the inside of the optical member 23 is converted into red light and green light by entering the quantum dots included in the wavelength conversion unit 41.
  • Light incident on the quantum dots is scattered.
  • Part of the scattered light enters the optical member 23 again.
  • Another part of the scattered light is reflected by the sealing portion 42 toward the optical member 23. That is, the light incident on the wavelength conversion unit 41 is suppressed from being emitted directly to the outside of the optical member 23.
  • the other part of the blue light that has entered the optical member 23 remains blue light. Therefore, red light, green light, and blue light are diffused and mixed inside the optical member 23 to become white light without color unevenness. As a result, white light having no color unevenness is emitted from the light exit surface of the optical member 23.
  • the wavelength conversion unit 41 faces the light exit surface 221 of the light source 22. Therefore, the blue light emitted from the light source 22 (see the broken arrow shown in FIG. 2) is easily incident on the wavelength conversion unit 41. Accordingly, a sufficient amount of red light and green light can be obtained, so that occurrence of color unevenness in white light due to a shortage of red light or green light is suppressed.
  • the wavelength converting part 41 is sealed in a space surrounded by the inner surface of the recess 33 and the sealing part 42. Therefore, the quantum dots included in the wavelength conversion unit 41 can be reliably protected from, for example, oxygen or moisture. Moreover, since the wavelength conversion part 41 and the sealing part 42 are distribute
  • the light emitted from the light exit surface of the optical member 23 is directly incident on the diffusion plate 25 or is reflected by the reflection sheet 24 and then enters the diffusion plate 25.
  • the light incident on the diffusion plate 25 is diffused. As a result, uniform light is emitted from the light source device 2 in the surface direction of the diffusion plate 25.
  • the display panel 11 is attached to the peripheral wall 212 of the box 21 so as to close the opening of the box 21 from the outside of the box 21.
  • the optical sheet group 12 is disposed between the display panel 11 and the diffusion plate 25.
  • the optical sheet group 12 is formed by laminating a plurality of optical sheets each having optical transparency. Each optical sheet has, for example, a light diffusion function, a light collection function, or a polarization function.
  • a spacer 13 is interposed between the peripheral edge of the optical sheet group 12 and the peripheral edge of the diffusion plate 25.
  • the spacer 13 has a frame shape and has a non-light-transmitting property and a buffering property.
  • the light source device 2 functions as a so-called direct type backlight.
  • the light emitted from the light source device 2 is transmitted through the optical sheet group 12, and the light transmitted through the optical sheet group 12 enters the display panel 11.
  • the light that has entered the display panel 11 passes through the display panel 11 or is blocked by the display panel 11, an image is displayed on the display panel 11.
  • the light source 22 generates heat with light emission.
  • the wavelength converter 41 is provided on the optical member 23.
  • an air gap is provided between the optical member 23 and the corresponding light source. Therefore, the wavelength converter 41 can be separated from the light source 22. Therefore, the heat generated by the light source 22 is not easily transmitted to the wavelength conversion unit 41. As a result, deterioration of the quantum dots included in the wavelength conversion unit 41 due to heat can be suppressed.
  • the light source 22 and the optical member 23 have a one-to-one correspondence. Therefore, the area of the surface that receives the light in the wavelength conversion unit 41 can be reduced. Accordingly, it is possible to reduce the total amount of quantum dots included in the wavelength conversion unit 41 provided in the plurality of optical members 23. As a result, the manufacturing cost of the light source device 2 can be reduced.
  • the light source 22 and the optical member 23 do not necessarily have a one-to-one correspondence, and one optical member 23 covers a plurality of (for example, two) light sources 22 within a range where the area of the wavelength conversion unit 41 does not increase. May be.
  • the light source 22 is not limited to an LED, and may be an LD (Laser Diode), for example.
  • the light emitted from the LD has high directivity. Therefore, when the LD is used, the area of the wavelength conversion unit 41 can be made smaller than when the LED is used, and the amount of quantum dots contained in the wavelength conversion unit 41 can be further reduced. Further, since blue light emitted from the LD has high color purity, white light with high color purity can be obtained.
  • the wavelength conversion unit 41 may include a quantum dot that converts the frequency of blue light into the frequency of yellow light. Further, the color of light emitted from the light source 22 is not limited to blue, and may be purple, for example. In this case, the wavelength conversion unit 41 includes a quantum dot that converts the frequency of the violet light into the frequency of the red light, a quantum dot that converts the frequency of the violet light into the frequency of the green light, and the frequency of the violet light of the blue light. Quantum dots that convert to frequency are included. Further, the wavelength conversion unit 41 may include a light emitter instead of the quantum dots.
  • the inner surface 311 and the outer surface 312 of the bottom wall 31 of the optical member 23 are not limited to flat surfaces parallel to each other, and may be, for example, a convex spherical surface or an inclined flat surface.
  • the optical member 23 is not limited to a bottomed cylindrical shape, and may be a dome shape, for example.
  • the recess 33 is not limited to the outer surface 312 of the bottom wall 31, and may be provided on the outer surface 322 of the side wall 32.
  • the light source device 2 according to the second to fourth embodiments is provided in the display device 1 according to the first embodiment, similarly to the light source device 2 according to the first embodiment.
  • the light source device 2 according to the second to fourth embodiments has the same effects as the light source device 2 according to the first embodiment.
  • differences from the light source device 2 of the first embodiment will be mainly described, and the same components as those of the light source device 2 of the first embodiment are denoted by the same reference numerals and description thereof will be omitted.
  • FIG. 3 is a cross-sectional view schematically showing a main configuration of the light source device 2 according to the second embodiment.
  • the optical member 23 is not provided with a recess 33.
  • the wavelength conversion unit 41 is provided in contact with a region facing the light exit surface 221 of the corresponding light source on the light exit surface of the optical member 23 (specifically, the outer surface 312 of the bottom wall 31).
  • the sealing unit 42 seals the wavelength conversion unit 41.
  • the area of the wavelength conversion unit 41 can be increased, and the light emitted from the light source 22 is incident on the wavelength conversion unit 41. Can be made easier.
  • FIG. 4 is a cross-sectional view schematically showing a main configuration of the light source device 2 according to the third embodiment.
  • the concave portion 33 of the optical member 23 according to the present embodiment is formed shallower than the concave portion 33 of the optical member 23 according to the first embodiment.
  • the whole recessed part 33 is filled with the wavelength conversion part 41, and the wavelength conversion part 41 is sealed by the sealing part 42 from the top.
  • the sealing part 42 seals the wavelength conversion part 41 and covers the peripheral part of the opening of the recess 33 in the outer surface 312 of the bottom wall 31 of the optical member 23.
  • the distance between the wavelength conversion unit 41 and the optical member 23 can be made wider than that in the first embodiment. Therefore, deterioration of the quantum dots included in the wavelength conversion unit 41 due to heat can be more effectively suppressed.
  • FIG. 5 is a cross-sectional view schematically showing a main configuration of the light source device 2 according to the fourth embodiment.
  • the light source device 2 according to the present embodiment collects light emitted from the light source 22 in the wavelength conversion unit 41 between the light source 22 and the wavelength conversion unit 41 provided in the optical member 23 covering the light source 22.
  • a light unit 27 is provided.
  • the condensing part 27 is a semi-convex lens, for example, and has a plane and a spherical surface.
  • the light collecting unit 27 is attached to the light source 22 so that the plane of the light collecting unit 27 covers the light emitting surface 221 of the light source 22.
  • the light emitted from the light source 22 is collected by the light collecting unit 27 (see the broken arrow), the light emitted from the light source 22 can be easily incident on the wavelength converting unit 41.
  • the light collecting unit 27 may be attached to the light source 22 of the first to third embodiments.
  • the light source device 2 seals the wavelength conversion unit 41 and the reflection unit 44 that reflects the light incident on the wavelength conversion unit 41 toward the optical member 23 instead of the sealing unit 42.
  • the sealing part 43 to be provided.
  • the concave portion 33 is filled with the wavelength converting portion 41, the sealing portion 43, and the reflecting portion 44.
  • the reflection unit 44 has a layered shape laminated on the wavelength conversion unit 41.
  • the reflecting portion 44 is made of, for example, a metal, specifically an aluminum thin film, and has high light reflectivity.
  • the sealing portion 43 has a layered shape laminated on the reflecting portion 44 and closes the opening of the concave portion 33.
  • the sealing part 43 is made of, for example, a synthetic resin genus.
  • the light incident on the quantum dots included in the wavelength conversion unit 41 is scattered. Part of the scattered light enters the optical member 23 again. Another part of the scattered light is reflected toward the optical member 23 by the reflecting portion 44. That is, the light incident on the wavelength conversion unit 41 is suppressed from being emitted directly to the outside of the optical member 23. Therefore, red light, green light, and blue light are diffused and mixed inside the optical member 23 to become white light with no color unevenness. As a result, white light having no color unevenness is emitted from the light exit surface of the optical member 23.
  • the sealing part 43 may be distribute
  • the reflection part 44 is distribute
  • the wavelength conversion part 41 may be provided in the outer surface 312 of the bottom wall 31 of the optical member 23 like the wavelength conversion part 41 shown in FIG. In this case, the laminated body of the sealing part 43 and the reflection part 44 may cover the wavelength conversion part 41 so that the sealing part 42 shown in FIG.
  • the sealing portion 43 and the reflecting portion 44 may be reversed. That is, the sealing unit 43 may be stacked on the wavelength conversion unit 41, and the reflection unit 44 may be stacked on the sealing unit 43.
  • the sealing portion 43 is light transmissive. Part of the light incident on the wavelength conversion unit 41 is transmitted through the sealing unit 43, and the light transmitted through the sealing unit 43 is reflected toward the optical member 23 by the reflection unit 44.
  • the wavelength conversion unit 41 may be sealed inside the sealing unit 43. Further, a plurality of layered or non-layered wavelength conversion parts 41 may be scattered and sealed inside the sealing part 43.
  • FIG. 6 is a cross-sectional view schematically showing a main configuration of the light source device 2 according to the fifth embodiment.
  • the light source device 2 according to the present embodiment has the same configuration as that of the light source device 2 according to the fourth embodiment, except that a light collecting unit 34 is provided instead of the light collecting unit 27.
  • a light collecting unit 34 is provided instead of the light collecting unit 27.
  • the light source device 2 of the present embodiment collects light emitted from the light source 22 in the wavelength conversion unit 41 between the light source 22 and the wavelength conversion unit 41 provided on the optical member 23 covering the light source 22.
  • the unit 34 is provided.
  • the condensing part 34 is provided on the inner surface 311 of the bottom wall 31 of the optical member 23.
  • the condensing part 34 is, for example, a convex part having a semi-convex lens shape, and projects from the inner surface 311 toward the light source 22.
  • the light emitted from the light source 22 is converted into the wavelength as in the fourth embodiment. It can make it easy to enter into the conversion part 41.
  • FIG. The condensing unit 34 may be provided in the optical member 23 of the first to third embodiments.
  • the light source device 2 covers the plurality of light sources 22 and each of the light sources 22 of the plurality of light sources 22 at a predetermined interval.
  • Light entrance surfaces 311 and 321 for entering emitted light, and light exit surfaces 312 and 322 provided outside the light entrance surfaces 311 and 321 when viewed from the part of the light sources 22.
  • the wavelength conversion unit 41 can be appropriately separated from the light source 22, and deterioration of the wavelength conversion body included in the wavelength conversion unit 41 due to heat can be suppressed. Moreover, the area of the surface which receives the light in the wavelength conversion part 41 can be made small, and the usage-amount of a wavelength converter can be reduced.
  • the light source device 2 may further include a sealing unit 42 that reflects the light incident on the wavelength conversion unit 41 toward the optical member 23 and seals the wavelength conversion unit 41. .
  • a sealing unit 42 that reflects the light incident on the wavelength conversion unit 41 toward the optical member 23 and seals the wavelength conversion unit 41.
  • the light scattered by the wavelength conversion unit 41 is reflected by the sealing unit 42 toward the optical member 23. Therefore, mixing of light by the optical member 23 can be promoted, and color unevenness of light emitted from the optical member 23 can be suppressed.
  • the wavelength conversion part 41 is sealed by the sealing part 42, the wavelength conversion part 41 can be protected from the substance which degrades the wavelength converter contained in the wavelength conversion part 41, for example.
  • the light source device 2 further includes a reflection unit 44 that reflects the light incident on the wavelength conversion unit 41 toward the optical member 23, and a sealing unit 43 that seals the wavelength conversion unit 41.
  • a reflection unit 44 that reflects the light incident on the wavelength conversion unit 41 toward the optical member 23, and a sealing unit 43 that seals the wavelength conversion unit 41.
  • the wavelength conversion unit 41 may be provided in a region of the light exit surfaces 312 and 322 facing the light exit surface 221 of the partial light source 22. According to the above configuration, the light emitted from the light source 22 can be easily incident on the wavelength conversion unit 41.
  • a concave portion 33 is provided in a region of the light emitting surfaces 312 and 322 facing the light emitting surface 221 of the part of the light sources 22, and the wavelength conversion unit 41 includes the concave portion. 33 may be provided. According to the above configuration, the light emitted from the light source 22 can be easily incident on the wavelength conversion unit 41, and the wavelength conversion unit 41 is disposed inside the recess 33, so that the wavelength conversion unit 41 collides with other members, for example. Can be protected from.
  • a condensing unit 27 that collects light emitted from the partial light sources 22 in the wavelength conversion unit 41 between the partial light sources 22 and the wavelength conversion unit 41. 34 may be further provided. According to the above configuration, the light emitted from the light source 22 can be efficiently incident on the wavelength conversion unit 41.
  • the optical member 23 includes a bottom wall 31 and a side wall 32 erected from the periphery of the bottom wall 31, and the inner surface 311 of the bottom wall 31 and the inner surface of the side wall 32.
  • 321 covers the part of the light source 22, the inner surface 311 of the bottom wall 31 and the inner surface 321 of the side wall 32 are the light incident surfaces, and the outer surface 312 of the bottom wall 31 and the outer surface 322 of the side wall 32 are It may be the light exit surface.
  • the display device 1 includes the light source device 2 according to the above-described embodiment and the display panel 11 illuminated by the light source device 2.
  • the wavelength conversion unit 41 can be appropriately separated from the light source 22, and deterioration of the wavelength converter included in the wavelength conversion unit 41 due to heat can be suppressed. Moreover, the area of the surface which receives the light in the wavelength conversion part 41 can be made small, and the usage-amount of a wavelength converter can be reduced. Therefore, the display apparatus 1 which can suppress deterioration by the heat
  • the light source device 2 which concerns on embodiment is not limited to the light source device 2 integrated in the display apparatus 1,
  • deterioration of the wavelength converter included in the wavelength conversion unit 41 due to heat can be suppressed.
  • the usage-amount of the wavelength conversion body contained in the wavelength conversion part 41 can be reduced.
  • the display device 1 or the light source device 2 may include components that are not disclosed in the first to fifth embodiments.
  • the constituent elements (technical features) disclosed in each embodiment can be combined with each other, and a new technical feature can be formed by the combination.

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  • General Engineering & Computer Science (AREA)
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Abstract

Selon l'invention, un dispositif source de lumière comprend une pluralité de sources de lumière, une pluralité d'éléments optiques, et une section de conversion de longueur d'onde. Chacun des éléments optiques recouvre certaines des sources de lumière à des intervalles prédéterminés, et comporte une surface d'entrée de lumière à partir de laquelle la lumière émise par certaines sources de lumière est introduite à l'intérieur, et une surface de sortie de lumière qui est située plus loin vers l'extérieur que la surface d'entrée de lumière du point de vue de certaines sources de lumière, chacun desdits éléments optiques émettant, à partir de la surface de sortie de lumière, la lumière diffusée à l'intérieur. La section de conversion de longueur d'onde est disposée en contact avec une partie de la surface de sortie de lumière de chacun des éléments optiques, et convertit la fréquence de la lumière.
PCT/JP2016/069797 2016-07-04 2016-07-04 Dispositif source de lumière et dispositif d'affichage WO2018008064A1 (fr)

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PCT/JP2016/069797 WO2018008064A1 (fr) 2016-07-04 2016-07-04 Dispositif source de lumière et dispositif d'affichage

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PCT/JP2016/069797 WO2018008064A1 (fr) 2016-07-04 2016-07-04 Dispositif source de lumière et dispositif d'affichage

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003110146A (ja) * 2001-07-26 2003-04-11 Matsushita Electric Works Ltd 発光装置
JP2005158949A (ja) * 2003-11-25 2005-06-16 Matsushita Electric Works Ltd 発光装置
JP2006179520A (ja) * 2004-12-20 2006-07-06 Nichia Chem Ind Ltd 半導体装置
JP2006186022A (ja) * 2004-12-27 2006-07-13 Toyoda Gosei Co Ltd 発光装置
WO2007111355A1 (fr) * 2006-03-28 2007-10-04 Kyocera Corporation Dispositif électroluminescent
JP2011509427A (ja) * 2008-01-03 2011-03-24 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 表示装置及び照明装置
JP2012015466A (ja) * 2010-07-05 2012-01-19 Panasonic Electric Works Co Ltd 発光装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003110146A (ja) * 2001-07-26 2003-04-11 Matsushita Electric Works Ltd 発光装置
JP2005158949A (ja) * 2003-11-25 2005-06-16 Matsushita Electric Works Ltd 発光装置
JP2006179520A (ja) * 2004-12-20 2006-07-06 Nichia Chem Ind Ltd 半導体装置
JP2006186022A (ja) * 2004-12-27 2006-07-13 Toyoda Gosei Co Ltd 発光装置
WO2007111355A1 (fr) * 2006-03-28 2007-10-04 Kyocera Corporation Dispositif électroluminescent
JP2011509427A (ja) * 2008-01-03 2011-03-24 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 表示装置及び照明装置
JP2012015466A (ja) * 2010-07-05 2012-01-19 Panasonic Electric Works Co Ltd 発光装置

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