WO2020209023A1 - Dispositif de source de lumière et dispositif d'affichage comprenant un dispositif de source de lumière - Google Patents

Dispositif de source de lumière et dispositif d'affichage comprenant un dispositif de source de lumière Download PDF

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Publication number
WO2020209023A1
WO2020209023A1 PCT/JP2020/012006 JP2020012006W WO2020209023A1 WO 2020209023 A1 WO2020209023 A1 WO 2020209023A1 JP 2020012006 W JP2020012006 W JP 2020012006W WO 2020209023 A1 WO2020209023 A1 WO 2020209023A1
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Prior art keywords
light source
spacer
source device
light
light emitting
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PCT/JP2020/012006
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English (en)
Japanese (ja)
Inventor
杉山　健
里奈 山本
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株式会社ジャパンディスプレイ
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Publication of WO2020209023A1 publication Critical patent/WO2020209023A1/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

Definitions

  • One of the embodiments of the present invention relates to a light source device for a liquid crystal module and a display device including the light source device.
  • the liquid crystal display device has a light source device (backlight) and a liquid crystal display module arranged on the light source device as a basic configuration.
  • a light source device backlight
  • a liquid crystal display module arranged on the light source device as a basic configuration.
  • Patent Documents 1 to 3 disclose a display device in which a light source device having a plurality of light emitting diodes is superimposed on a liquid crystal display module.
  • One of the problems of the embodiment of the present invention is to provide a light source device capable of irradiating a liquid crystal display module with light with uniform brightness, and a display device provided with the light source device.
  • a display device provided with the light source device.
  • one of the embodiments is to provide a display device having a narrow frame area and high design.
  • a light source substrate a light emitting element including a plurality of light emitting diodes on the light source substrate, an optical sheet located on the plurality of light emitting elements and separated from the plurality of light emitting elements, and an optical sheet.
  • a light source device comprising at least one spacer disposed between a light source substrate and an optical sheet, the light source substrate having a through hole, and a part of the at least one spacer being arranged in the through hole. ..
  • the light source device and the liquid crystal display module on the light source device are provided, and the light source device includes a light source substrate, a light emitting element including a plurality of light emitting diodes on the light source substrate, and a plurality of light emitting elements. It has an optical sheet located on the light emitting element and separated from the plurality of light emitting elements, and at least one spacer arranged between the light source substrate and the light diffusing plate optical sheet, and the light source substrate has a through hole.
  • a display device having a portion of at least one spacer disposed in the through hole.
  • the schematic development view of the light source apparatus which concerns on one Embodiment of this invention. Schematic cross-sectional view and top view of the light source device according to the embodiment of the present invention.
  • the schematic cross-sectional view which shows the manufacturing method of the light source apparatus which concerns on one Embodiment of this invention.
  • the schematic cross-sectional view which shows the manufacturing method of the light source apparatus which concerns on one Embodiment of this invention.
  • Schematic cross-sectional view and top view of the light source device according to the embodiment of the present invention Schematic cross-sectional view and top view of the light source device according to the embodiment of the present invention.
  • the schematic development view of the light source apparatus which concerns on one Embodiment of this invention.
  • the schematic top view of the light source apparatus which concerns on one Embodiment of this invention.
  • the schematic top view of the light source apparatus which concerns on one Embodiment of this invention.
  • the schematic top view of the light source apparatus which concerns on one Embodiment of this invention The schematic top view of the light source apparatus which concerns on one Embodiment of this invention.
  • the schematic top view of the light source apparatus which concerns on one Embodiment of this invention The schematic top view of the light source apparatus which concerns on one Embodiment of this invention.
  • drawings may schematically represent the width, thickness, shape, etc. of each part as compared with the actual embodiment, but this is merely an example and the interpretation of the present invention is limited. It is not something to do.
  • elements having the same functions as those described with respect to the above-described drawings may be designated by the same reference numerals and duplicate description may be omitted.
  • FIG. 1 is a schematic development view showing the overall configuration of the display device 100.
  • the first direction DX, the second direction DY, and the third direction DZ are orthogonal to each other, but may intersect at an angle other than 90 degrees.
  • the first direction DX and the second direction DY correspond to the directions parallel to the main surface of the substrate constituting the display device 100
  • the third direction DZ corresponds to the thickness direction of the display device 100.
  • viewing the DX-DY plane defined by the first direction DX and the second direction DY is defined as a plan view.
  • viewing a plane including the third direction DZ for example, a DX-DZ plane or a DY-DZ plane is defined as a cross-sectional view.
  • the display device 100 includes a light source device 110 and a liquid crystal display module 200 that superimposes on the light source device 110. Further, the display device 100 may include a touch sensor 220 on the liquid crystal display module 200.
  • the direction from the light source device 110 toward the liquid crystal display module 200 is defined as the upward direction, and the direction from the liquid crystal display module 200 toward the light source device 110 is defined as the downward direction.
  • the liquid crystal display module 200 includes a first substrate 202, a second substrate 214 facing the first substrate 202, a pair of polarizing plates 216 and 218 sandwiching the first substrate 202 and the second substrate 214, and the first substrate 202 and the first substrate 202. It has a liquid crystal layer (not shown) sandwiched between two substrates 214.
  • the first substrate 202 has a plurality of pixels 204, a drive circuit for driving the pixels 204 (scanning line drive circuit 208, signal line drive circuit 210), and a plurality of terminals 212.
  • the pixel 204, the drive circuit, and the terminal 212 have a laminate such as a conductive film, an insulating film, and a semiconductor film.
  • the liquid crystal display module 200 has a display area 206 including a plurality of pixels 204, and a frame area that is an area other than the display area 206.
  • the pair of polarizing plates 216 and 218 are arranged so as to overlap the display area 206.
  • Various signals including a video signal and a power source are supplied to the liquid crystal display module 200 from an external circuit (not shown) via the terminal 212.
  • the drive circuit operates by these signals and power supplies.
  • the orientation of the liquid crystal molecules contained in the liquid crystal layer on the pixel 204 is controlled.
  • the light emitted from the light source device 110 is incident on the liquid crystal display module 200, the incident light is controlled for each pixel 204, and an image is displayed.
  • the touch sensor 220 is arranged so as to overlap the display area 206.
  • the touch sensor 220 for example, the mutual capacitance type capacitive touch sensor shown in FIG. 1 can be used.
  • the touch sensor 220 includes a plurality of first touch electrodes 222 extending in the first direction DX, a plurality of second touch electrodes 224 intersecting with the first touch electrode 222, and an insulating film (illustrated) that electrically insulates them from each other. Does not).
  • a capacitance is formed between the first touch electrode 222 and the second touch electrode 224, and the capacitance changes when an object, for example, a user touches the touch sensor 220 with a finger or the like.
  • touch includes not only contact but also proximity of objects.
  • the light source device 110, the liquid crystal display module 200, and the touch sensor 220 are drawn so as to be separated from each other, but these are fixed to each other by using an adhesive layer, a housing, or the like.
  • the touch sensor 220 of the present embodiment is not limited to the mutual capacitance type touch sensor. As the touch sensor 220, a self-capacitating touch sensor may be used.
  • the touch sensor 220 of the present embodiment is not limited to the so-called out-cell type touch sensor provided separately from the liquid crystal display module 200.
  • the touch sensor 220 may be a touch sensor integrated with the liquid crystal display module 200, a so-called in-cell touch panel.
  • the electrodes and wiring included in the liquid crystal display module 200 function as touch electrodes.
  • FIG. 2 shows a schematic development view of the light source device 110.
  • the light source device 110 has a rear bezel 120 and a front cover 180 that fits into the rear bezel 120.
  • the light source substrate 140 and the optical sheet on the light source substrate 140 are arranged between the rear bezel 120 and the front cover 180.
  • the optical sheet includes a light diffusing plate 170, a prism sheet 174 on the light diffusing plate 170, and a polarizing sheet 176 on the prism sheet 174.
  • a plurality of inorganic light emitting elements 142 are arranged on the light source substrate 140.
  • the optical sheet may have a wavelength conversion film 172 between the light diffusing plate 170 and the prism sheet 174.
  • the wavelength conversion film 172 may not be provided between the light diffusing plate 170 and the prism sheet 174, but may be provided between the light source substrate 140 and the light diffusing plate 170.
  • the rear bezel 120 functions as a storage body for accommodating the light source substrate 140 and the optical sheet (light diffusing plate 170, prism sheet 174, polarizing sheet 176, wavelength conversion film 172, etc.) constituting the light source device 110.
  • the light source substrate 140 and the optical sheet are fixed.
  • the rear bezel 120 is provided with one or more openings 120a.
  • the light source substrate 140 and the external circuit are electrically connected by a flexible printed circuit board (FPC) or the like provided through the opening 120a.
  • FPC flexible printed circuit board
  • FIGS. 3 (A) and 3 (B) A schematic cross-sectional view and top view of a part of the light source device 110 are shown in FIGS. 3 (A) and 3 (B), respectively.
  • the light source substrate 140 is housed in the rear bezel 120.
  • the light source substrate 140 may be in contact with the rear bezel 120.
  • the plurality of inorganic light emitting elements 142 are arranged on the light source substrate 140 and overlap with the display area 206.
  • the inorganic light emitting elements 142 are arranged in a grid pattern, for example.
  • the pitch of the adjacent inorganic light emitting elements 142 can be arbitrarily set according to the size of the display device 100.
  • the pitch between the adjacent inorganic light emitting elements 142 may be selected from, for example, 1 mm or more and 20 mm or less, 3 mm or more and 15 mm or less, or 5 mm or more and 10 mm or less.
  • it is preferable that the plurality of inorganic light emitting elements 142 are arranged at a uniform pitch.
  • the inorganic light emitting element 142 is a light emitting diode having an inorganic light emitting body such as gallium nitride or gallium nitride containing indium sandwiched between a pair of electrodes, and a light emitting element having a protective film for protecting the light emitting diode.
  • the inorganic light emitting element 142 is configured to emit light by electroluminescence.
  • an inorganic compound that gives an emission peak between 400 nm and 530 nm can be selected. Blue light is extracted from the inorganic light emitting element 142 through the protective film.
  • a light emitting diode in which a color conversion material that converts light from an inorganic light emitter is dispersed in a protective film may be used.
  • the light emitting diode emits white light because the light from the inorganic light emitter and the light converted by the color conversion material are mixed.
  • a fluorescent material that emits fluorescence in the green to red region, for example, yellow fluorescence may be used.
  • the wavelength conversion film 172 is not provided, and the light diffusing plate 170 and the prism sheet 174 can be arranged so as to be in contact with each other.
  • each inorganic light emitting element 142 there is no limitation on the size of each inorganic light emitting element 142, for example, each occupied area is 1.0 ⁇ 10 4 ⁇ m 2 or more and 1.0 ⁇ 10 6 ⁇ m 2 or less 4.0 ⁇ 10 4 ⁇ m 2 or more 5.0.
  • a light emitting diode of ⁇ 10 5 ⁇ m 2 or less, or 9.0 ⁇ 10 4 ⁇ m 2 or more and 2.5 ⁇ 10 5 ⁇ m 2 or less can be used.
  • a so-called micro LED having a size of about 320 ⁇ m ⁇ 300 ⁇ m can be used as the inorganic light emitting element 142.
  • the light source device 110 may further have an overcoat 144 that covers the inorganic light emitting element 142.
  • the overcoat 144 may be in contact with the light source substrate 140.
  • the overcoat 144 has a function of protecting the inorganic light emitting element 142 and preventing separation from the light source substrate 140, and also absorbs irregularities caused by the inorganic light emitting element 142 to give a flat surface. Further, although the inorganic light emitting element 142 gives light having relatively high directivity, the light from the inorganic light emitting element 142 can be spread or diffused by the overcoat 144.
  • the overcoat 144 has a high transmittance in the visible light region.
  • the overcoat 144 includes, for example, an acrylic resin, polycarbonate, a polymer material exemplified for polyester such as polyethylene terephthalate, or a silicon-containing inorganic compound such as silicon oxide.
  • the thickness of the overcoat 144 is preferably such that it covers the inorganic light emitting element 142.
  • the thickness of the overcoat 144 may be selected from, for example, 200 ⁇ m or more and 1 mm or less, 400 ⁇ m or more and 1 mm or less, or 500 ⁇ m or more and 800 ⁇ m or less.
  • the light diffusing plate 170 diffuses the light from the inorganic light emitting element 142 to provide a uniform light emitting surface.
  • the thickness of the light diffusing plate 170 can be selected from, for example, 0.5 mm or more and 2 mm or less, or 0.75 mm or more and 1.5 mm or less.
  • the light diffusing plate 170 is arranged apart from the inorganic light emitting element 142. Specifically, the distance from the upper surface of the light source substrate 140 (the surface of the DX-DZ plane that is closer to the liquid crystal display module 200) to the bottom surface of the light diffuser plate 170 (the surface of the DX-DZ plane that is farther from the liquid crystal display module 200). (Also called an optical distance) is 1 mm or more and 3 mm or less, or 1.5 mm or more and 2.5 mm or less. Therefore, the light diffusing plate 170 and the inorganic light emitting element 142, or the light diffusing plate 170 and the overcoat 144 do not come into direct contact with each other.
  • the light source device 110 of the present embodiment has at least one spacer 146 between the light source substrate 140 and the optical sheet.
  • a plurality of spacers 146 may be arranged instead of one.
  • the number of spacers 146 may be smaller than that of the inorganic light emitting element 142.
  • a space 150 is formed between the light source substrate 140 and the light diffusing plate 170 by the spacer 146. As shown in FIG. 3B, the spacer 146 is arranged so as not to overlap the inorganic light emitting element 142 in a plan view.
  • the spacers 146 may be randomly arranged on the light source substrate 140, but are preferably arranged in a grid pattern, for example, as shown in FIG. 3 (B). As a result, the distance GP between the light source substrate 140 and the optical sheet can be kept constant throughout the light source device 110.
  • the spacer 146 is a material applicable to the light diffusing plate 170, for example, a polymer compound such as polyacrylic acid ester, polymethacrylic acid ester, and polystyrene, or calcium carbonate, barium sulfate, titanium dioxide, aluminum hydroxide, and silicon oxide. , Talk, mica, white carbon, magnesium oxide, or inorganic compounds such as zinc oxide may be included. Alternatively, a metal such as aluminum or stainless steel, which has a relatively high reflectance to visible light, may be used.
  • the shape of the spacer 146 can be a pillar shape.
  • the long axis of the spacer 146 is arranged parallel to the third direction DZ, that is, perpendicular to the upper surface of the light source substrate 140, that is, parallel to the normal line of the upper surface of the light source substrate 140.
  • the length of the long axis of the spacer 146 determines the distance GP between the light source substrate 140 and the optical sheet. Therefore, the length of the major axis of the spacer 146 is selected from the range of 1 mm or more and 3 mm or less, or 1.5 mm or more and 2.5 mm or less.
  • the cross-sectional shape of the spacer 146 in the DX-DY plane is not limited, and may be circular, elliptical or polygonal as shown in FIG. 3 (B). Alternatively, a plurality of spacers 146 having different cross-sectional shapes may be arranged.
  • the spacer 146 is in contact with the upper surface of the light source substrate 140 and the bottom surface of the light diffusing plate 170.
  • the overcoat 144 is provided with a through hole, and a part of the spacer 146 is arranged in the through hole.
  • a plurality of through holes 152 penetrating the light source substrate 140 and the overcoat 144 are provided, and the light source device 110 is configured so that a part of the spacer 146 is located in the through hole 152. May be good. In this case, the spacer 146 may penetrate the overcoat 144 and come into contact with the rear bezel 120.
  • the spacer 146 may be arranged so as to be in contact with the wavelength conversion film 172 as shown in FIG. 4 (B).
  • a stopper 154 for fixing the spacer 146 may be provided.
  • the stopper 154 is provided under the light source substrate 140 between the light source substrate 140 and the rear bezel 120 in a cross-sectional view, and is arranged so as to overlap the spacer 146 in a plan view.
  • the stopper 154 may be in contact with the rear bezel 120.
  • the stopper 154 may contain a metal such as aluminum or stainless steel, or may contain a polymer material such as polyimide, polyamide, acrylic resin, or epoxy resin. Further, the stopper 154 and the spacer 146 may be integrated. By providing the stopper 154, the height of the spacer 146 is fixed, and the distance GP between the optical sheet and the light source substrate 140 can be stably maintained.
  • a cushioning material 156 in contact with the spacer 146 may be provided between the spacer 146 and the optical sheet.
  • the cushioning material 156 preferably contains an elastomer exhibiting rubber elasticity. Examples of the material exhibiting rubber elasticity include polysiloxane, polyacrylate, polymethacrylate, polyacrylonitrile, epoxy resin, polybutadiene, polyisoprene, and a copolymer containing these as a basic skeleton.
  • the wavelength conversion film 172 is arranged between the light diffusing plate 170 and the prism sheet 174, the cushioning material 156 comes into contact with the light diffusing plate 170.
  • the cushioning material 156 comes into contact with the wavelength conversion film 172.
  • the cushioning material 156 By arranging the cushioning material 156, it is possible to prevent the optical sheet arranged on the cushioning material 156 from being damaged. Further, it is possible to prevent an adverse effect on the luminance distribution due to the breakage of the optical sheet.
  • the stopper 154 can be manufactured, for example, by going through the following process.
  • an overcoat 144 is formed on the light source substrate 140 so as to cover the inorganic light emitting element 142.
  • the overcoat 144 is formed by applying, for example, the above-mentioned polymer material or a precursor thereof by using a wet film forming method such as a spin coating method, a printing method, an inkjet method, a dipping method, or a spray method, and then applying heat or light. It can be formed by curing with use.
  • an overcoat 144 containing silicon oxide may be formed by using a chemical vapor deposition (CVD) method. If the overcoat 144 is not provided, this step can be omitted.
  • CVD chemical vapor deposition
  • a through hole 152 is formed so as to penetrate the light source substrate 140 and the overcoat 144 (FIG. 6 (B)).
  • the through hole 152 may be formed by etching the overcoat 144, or may be physically formed by laser irradiation, sandblasting, ultrasonic drilling, or the like.
  • the stopper 154 is formed. Specifically, a resist film 158 is formed on the bottom surface of the light source substrate 140 (that is, a surface on which the inorganic light emitting element 142 is not formed) (FIG. 6C), and then the resist film 158 is exposed via a photomask. Then continue to develop. As a result, the stopper 154 is formed so as to selectively close the through hole 152 in the region overlapping the through hole 152 (FIG. 6 (D)).
  • FIG. 7 (A) in which the spacers 146 are arranged in the through holes 152, respectively.
  • the light diffusing plate 170 is placed on the spacer 146.
  • the cushioning material 156 may be formed on the light diffusing plate 170, and then the light diffusing plate 170 may be arranged on the spacer 146 (FIG. 7 (B)).
  • a through hole 152 is formed in the light source substrate 140 before the overcoat 144 is formed.
  • the stopper 154 that closes the through hole 152 may be formed as described above, and the spacer 146 may be continuously inserted into the through hole 152 (FIG. 8 (B)).
  • a spacer 146 integrated with the stopper 154 may be inserted so as to penetrate the through hole 152.
  • an overcoat 144 is formed on the light source substrate 140 so as to cover the inorganic light emitting element 142 (FIG. 8C), and the light diffusing plate 170 is arranged on the overcoat 144 to prevent the stopper 154. Can be produced.
  • the wavelength conversion film 172 is a film having a function of emitting light from the inorganic light emitting element 142 and converting the wavelength of the light diffused by the light diffusing plate 170 to generate white light, and is fluorescent in the polymer material. It has a dispersed structure.
  • the phosphor contains a fluorescent substance that absorbs blue light emitted from the inorganic light emitting element 142 and emits fluorescence in the green to red region, for example, yellow fluorescence.
  • the above-mentioned color conversion material may be used.
  • quantum dots having a particle size of several nm to several tens of nm may be used.
  • the wavelength conversion film 172 may be arranged above or below the light diffusing plate 170 as one separately prepared independent film, or a dispersion liquid containing the above-mentioned polymer material or its precursor and a phosphor or quantum dots. May be formed by applying the above or below the light diffusing plate 170 and then curing.
  • the prism sheet 174 is an optical film for efficiently emitting light after passing through the light diffusing plate 170 and the wavelength conversion film 172 in the upward direction, and has a structure in which a plurality of prism shapes are arranged in parallel on the surface. Has.
  • the polarizing sheet 176 is, for example, an anisotropic reflection polarizer. More specifically, the polarizing sheet 176 reflects light that is circularly polarized or elliptically polarized and does not coincide with the transmission axis of the polarizing sheet 176 by the multilayer film formed in the polarizing sheet 176, and repeatedly recovers the reflected component. .. By efficiently reflecting light, loss of light can be prevented and the brightness of emitted light can be improved. Further, by providing the polarizing sheet 176, the effect of diffusing the highly directional light emitted from the inorganic light emitting element 142 can be obtained.
  • the light source substrate 140 on which the plurality of inorganic light emitting elements 142 are arranged and the optical sheet (light diffusion plate 170, prism sheet 174, polarizing sheet 176, etc.) are placed between the rear bezel 120 and the front cover 180. It is housed in and fixed to each other.
  • a liquid crystal display module 200 is arranged on the light source device 110 to form a display device 100.
  • a spacer 146 is arranged between the light source substrate 140 and the optical sheet, and a constant distance is maintained between them.
  • the emitted light is diffused in the space 150 between the light source substrate 140 and the optical sheet. Further, the directivity is further lowered by repeatedly reflecting the emitted light in the space 150. As a result, the generation of locally high-luminance regions (hot spots) is suppressed on the bottom surface of the light diffusing plate 170. Further, the light whose intensity distribution is lowered by the space 150 is further diffused by the light diffusing plate 170, and the light is incident on the liquid crystal display module 200 with uniform brightness. Therefore, light having uniform brightness is provided for the display area 206, and the display device 100 enables high-quality display.
  • the inorganic light emitting element 142 that functions as a light source is arranged so as to overlap the display area 206 in a plan view.
  • a reflector for reflecting the light toward the liquid crystal display module 200 side becomes unnecessary. Therefore, the number of parts constituting the light source device can be reduced. This contributes to making the display device thinner. Further, since it is not necessary to arrange the light source in the frame area, the frame area can be reduced and the area of the display area 206 with respect to the entire display device 100 can be increased. Therefore, by applying this embodiment, it is possible to provide a display device having excellent design.
  • the light source device 112 having a structure different from that of the light source device 110 of the first embodiment will be described with reference to FIGS. 9 (A) to 10 (B). The description may be omitted for a structure that is the same as or similar to the structure described in the first embodiment.
  • the light source device 112 of the second embodiment has a first aspect in that the spacer 146 has a spherical shape or an ellipsoidal shape (spheroidal shape). It is different from the light source device 110 of the embodiment.
  • the ellipsoidal spacer 146 has a circular or elliptical shape in cross-sectional view. Spherical and ellipsoidal spacers 146 may be mixed in the light source device 112.
  • the number of spacers 146 may be less or more than the number of inorganic light emitting elements 142.
  • the spacer 146 may be arranged so as not to overlap with the inorganic light emitting element 142.
  • the spacer 146 contains a polymer material capable of transmitting visible light
  • a part of the spacer 146 may overlap with the inorganic light emitting element 142 as shown in FIGS. 9A and 9B. .. Further, as shown in FIGS. 10A and 10B, at least two of the plurality of spacers 146 may be in contact with each other.
  • the distance GP between the light source substrate 140 and the optical sheet is determined by the size of the spacer 146. Specifically, if the spacer 146 has a spherical shape, the distance GP is determined by the diameter, and if the spacer 146 has an ellipsoidal spherical shape, the distance GP is determined by the major axis or the minor axis. Therefore, the diameter, major axis, or minor axis of the spacer 146 is selected from the range of 1 mm or more and 3 mm or less, or 1.5 mm or more and 2.5 mm or less.
  • the light source device 112 having such a structure can be formed by arranging the spacer 146 on the inorganic light emitting element 142 or the overcoat 144 when arranging the light diffusing plate 170 on the light source substrate 140.
  • the spacer 146 can be arranged by dispersing the spacer 146 in an organic solvent such as water or alcohol and applying this dispersion.
  • the inorganic light emitting element 142 and the optical sheet can be separated from each other by the spacer 146. Further, the distance GP between the light source substrate 140 and the optical sheet can be kept constant. Therefore, the same effect as that of the first embodiment is obtained.
  • the light source device 114 having a structure different from that of the light source devices 110 and 112 will be described with reference to FIGS. 11 to 15. The description may be omitted for structures that are the same as or similar to the structures described in the first and second embodiments.
  • the light source device 114 of the present embodiment is the first embodiment in that the spacer 146 provided in the light source device 114 may be a single spacer and that the spacer 146 extends in a plane parallel to the upper surface of the light source substrate 140. It is different from the light source device 110 of the embodiment and the light source device 112 of the second embodiment.
  • each of the single or plurality of spacers 146 is in the DX-DY plane in the plane parallel to the upper surface of the light source substrate 140 (DX-DY plane). It has a plurality of straight portions 146a extending in a direction parallel to the above. The plurality of straight portions 146a are connected by the bent portions 146b. Similar to the light source devices 110 and 112, the spacer 146 may be provided so as to extend between the inorganic light emitting elements 142 so as not to overlap with the inorganic light emitting element 142. Alternatively, when the spacer 146 contains a material capable of transmitting visible light, the spacer 146 may be arranged so as to overlap a part of the inorganic light emitting element 142.
  • the two straight portions 146a connected via one bent portion 146b extend in different directions in the DX-DY plane.
  • the angle formed by the stretching direction is arbitrary and is selected from a range greater than 0 ° and less than 180 °. Therefore, the spacer 146 may have a zigzag shape in the DX-DY plane. Alternatively, as shown in FIG. 13, the spacer 146 may have a spiral shape in the DX-DY plane.
  • the light source device 114 may have a plurality of spacers 146 each having a single linear portion 146a.
  • the lengths of the linear portions 146a of the plurality of spacers 146 may be the same or different from each other.
  • the stretching directions of the straight portions 146a of the plurality of spacers 146 may all be the same, or at least two stretching directions may be different from each other as shown in FIG.
  • the spacer 146 of the light source device 114 may have a curved shape (planar shape) in the DX-DY plane.
  • the planar shape of the spacer 146 may be composed only of a curved line, and the proportion of the portion formed by the curved line may be 80% or more and 100% or less, or 90% or more and 100% or less.
  • the inorganic light emitting element 142 and the light diffusing plate 170 can be separated from each other by the spacer 146, and the distance between them can be kept constant. As a result, the same effect as that of the first embodiment is obtained.
  • the distance GP between the light source substrate 140 and the optical sheet is determined by the height H of the spacer 146 (the length in the third direction DZ, see FIG. 11). Therefore, the height H of the spacer 146 is selected from the range of 1 mm or more and 3 mm or less, or 1.5 mm or more and 2.5 mm or less.

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  • General Engineering & Computer Science (AREA)
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Abstract

L'invention concerne un dispositif de source de lumière comprenant : un substrat de source de lumière ; une pluralité d'éléments électroluminescents inorganiques au-dessus du substrat de source de lumière ; une feuille optique qui est positionnée au-dessus de la pluralité d'éléments électroluminescents inorganiques et est séparée de la pluralité d'éléments électroluminescents inorganiques ; et au moins un élément d'espacement disposé entre la pluralité d'éléments électroluminescents inorganiques et la feuille optique. Le substrat de source de lumière comprend des trous traversants, et une partie de l'élément d'espacement est disposée dans les trous traversants. Le dispositif de source de lumière peut en outre comprendre une couche de finition qui recouvre la pluralité d'éléments électroluminescents inorganiques et entre en contact avec le substrat de source de lumière. Le ou les éléments d'espacement peuvent entrer en contact avec la couche de finition.
PCT/JP2020/012006 2019-04-12 2020-03-18 Dispositif de source de lumière et dispositif d'affichage comprenant un dispositif de source de lumière WO2020209023A1 (fr)

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JP2019076348A JP2020174012A (ja) 2019-04-12 2019-04-12 光源装置、及び光源装置を有する表示装置
JP2019-076348 2019-04-12

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WO2020209023A1 true WO2020209023A1 (fr) 2020-10-15

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KR20120050284A (ko) * 2010-11-10 2012-05-18 삼성엘이디 주식회사 두께가 감소된 백라이트 유닛
JP2014022117A (ja) * 2012-07-13 2014-02-03 Sharp Corp 発光装置
JP2017045533A (ja) * 2015-08-24 2017-03-02 シャープ株式会社 照明装置、表示装置、及びテレビジョン受信機
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JP2009150981A (ja) * 2007-12-19 2009-07-09 Toppan Printing Co Ltd 光学シート、バックライトユニット及びディスプレイ装置
JP2010015853A (ja) * 2008-07-04 2010-01-21 Epson Imaging Devices Corp 照明装置、液晶表示装置および電子機器
KR20120050284A (ko) * 2010-11-10 2012-05-18 삼성엘이디 주식회사 두께가 감소된 백라이트 유닛
JP2014022117A (ja) * 2012-07-13 2014-02-03 Sharp Corp 発光装置
JP2017045533A (ja) * 2015-08-24 2017-03-02 シャープ株式会社 照明装置、表示装置、及びテレビジョン受信機
JP2017162726A (ja) * 2016-03-10 2017-09-14 キヤノン株式会社 照明装置及び表示装置

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