WO2018037775A1 - Dispositif de source de lumière et dispositif de rétroéclairage le comportant, et dispositif d'affichage - Google Patents

Dispositif de source de lumière et dispositif de rétroéclairage le comportant, et dispositif d'affichage Download PDF

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Publication number
WO2018037775A1
WO2018037775A1 PCT/JP2017/026039 JP2017026039W WO2018037775A1 WO 2018037775 A1 WO2018037775 A1 WO 2018037775A1 JP 2017026039 W JP2017026039 W JP 2017026039W WO 2018037775 A1 WO2018037775 A1 WO 2018037775A1
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Prior art keywords
light
light source
source device
quantum dot
jig
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PCT/JP2017/026039
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English (en)
Japanese (ja)
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敦幸 田中
悠作 味地
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シャープ株式会社
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Publication of WO2018037775A1 publication Critical patent/WO2018037775A1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements

Definitions

  • the following disclosure relates to a light source device, and more particularly to a light source device that obtains white light by a combination of a blue LED and quantum dots, a backlight device including the light source device, and a display device.
  • a transmissive liquid crystal display device requires a backlight device that can irradiate a liquid crystal panel with white light including a red component, a green component, and a blue component.
  • CCFLs cold cathode tubes
  • LEDs has increased from the viewpoint of low power consumption and ease of brightness control.
  • a backlight device having a configuration using a red LED, a green LED, and a blue LED as a light source has been conventionally known.
  • a technique for obtaining white light by combining a blue LED and a quantum dot has attracted attention.
  • a white LED package called “surface mount type” as shown in FIG. 32
  • a configuration in which blue LEDs and quantum dots are combined is employed.
  • the blue LED 801 provided on the package substrate 810 is covered with quantum dots 802.
  • the blue LED 801 is covered with a resin including green quantum dots and red quantum dots.
  • quantum dots are dispersed and arranged in the LED package.
  • a reflector 820 for reflecting light is provided in a region around the blue LED 801 on the package substrate 810.
  • the blue LED 801 has an anode connected to the electrode 841 through the bonding wire 831, and the blue LED 801 has a cathode connected to the electrode 842 through the bonding wire 832.
  • the quantum dot 802 used include a combination of a green quantum dot having an emission peak wavelength of 500 to 550 nm and a red quantum dot having an emission peak wavelength of 600 nm or more. According to such a structure, the half value width of green light and red light can be narrowed. Accordingly, a wide color gamut of the liquid crystal display device is realized by combining a backlight device configured using quantum dots and a liquid crystal panel configured using high density color filters.
  • FIG. 33 is a schematic cross-sectional view of a backlight device employing a QD capillary system.
  • quantum dots 852 sealed in a glass (elongated glass tube) 870 are disposed between the blue LED 851 and the light guide 880.
  • a reflector 860 for reflecting light is provided so as to cover the glass 870 enclosing the quantum dots 852 and the blue LED 851.
  • the quantum dot 852 for example, a combination of a green quantum dot and a red quantum dot is used.
  • the light emitted from the blue LED 851 passes through the quantum dots 852 and becomes white light and enters the light guide 880. Thereby, white light is emitted from the light guide 880 toward the liquid crystal panel (not shown).
  • quantum dots have the property of being vulnerable to heat and humidity.
  • the quantum dots 802 are arranged at positions very close to the blue LED 801. Further, unlike the quantum dot sheet described later, the quantum dot 802 in the surface mount type configuration is not provided with a barrier film for protection from humidity. From the above, according to the surface mount type configuration, the quantum dots 802 are easily deteriorated.
  • the quantum dots 852 are enclosed in the glass 870 and disposed at a position away from the blue LED 851 to some extent. Therefore, in the QD capillary system, the quantum dots 852 are less likely to be deteriorated by the influence of heat and humidity.
  • the phosphor sheet contains a phosphor that emits light when excited by light emitted from a blue LED.
  • Specific examples of the phosphor sheet used include a phosphor sheet containing a yellow phosphor and a phosphor sheet containing a green phosphor and a red phosphor. Regarding such a phosphor sheet, it is also considered to employ quantum dots as the phosphor.
  • FIG. 34 is a side view showing a schematic configuration of a conventional backlight device that obtains white light by a combination of a blue LED and a phosphor sheet.
  • This backlight device includes a plurality of blue LEDs 93 as light sources, an LED substrate 92 on which the plurality of blue LEDs 93 are mounted, and a diffusion for diffusing the light emitted from the blue LEDs 93 to make the surface uniform light.
  • the chassis is not shown.
  • a phosphor sheet for example, a phosphor sheet containing a yellow phosphor
  • a phosphor sheet 95 is provided as shown in FIG. 34, so that white light is emitted from the backlight device as backlight light. Emitted.
  • a liquid crystal display device that performs local dimming processing that logically divides a screen into a plurality of areas and controls the luminance (light emission intensity) of the light source device for each area.
  • the luminance of the light source device is controlled based on the input image in the corresponding area. Specifically, the luminance of each light source device is obtained based on the maximum value or average value of the target luminance (luminance corresponding to the input gradation value) of the pixels included in the corresponding area. In the area where the luminance of the light source device is smaller than the original luminance, the transmittance of each pixel is increased. Thereby, the target display brightness
  • development of an HDR drive for displaying a very wide dynamic range has been actively performed.
  • the local dimming process is also used when realizing this HDR drive.
  • FIGS. 35 to 37 are diagrams showing luminance, chromaticity x, and chromaticity y, respectively, when only one central area is turned on (partial lighting) in a configuration using white LEDs.
  • 38 to 40 are diagrams showing luminance, chromaticity x, and chromaticity y, respectively, when only one central area is turned on (partial lighting) in a configuration using a phosphor sheet.
  • 35 to 40 it can be understood that the configuration using the phosphor sheet has a larger chromaticity difference depending on the location than the configuration using the white LED.
  • a backlight is provided in the vicinity immediately above the lit blue LED (the portion indicated by the arrow 99 in FIGS.
  • the color of the light is blue, and the color of the backlight becomes yellowish as the distance from the lighting point increases.
  • color unevenness occurs due to a small amount of light mixed in each area.
  • FIG. 41 to 43 show the luminance, chromaticity x, and chromaticity y when 36 areas (6 vertical areas ⁇ 6 horizontal areas) are turned on (partial lighting) in a configuration using a phosphor sheet.
  • FIG. 44 to 46 are diagrams showing luminance, chromaticity x, and chromaticity y, respectively, when the entire surface is turned on in the configuration using the phosphor sheet. From FIG. 39, FIG. 40, FIG. 42, FIG. 43, FIG. 45, and FIG. 46, it is understood that the chromaticity of the backlight light in the vicinity immediately above the lit blue LED differs depending on the lighting range. That is, how color unevenness occurs differs depending on the lighting range.
  • the light 9 a emitted from the blue LED 93 is divided into light (component) 9 b that passes through the optical sheet 96 and light (component) 9 c that is reflected by the optical sheet 96 after passing through the phosphor sheet 95. That is, some components of the light 9 a emitted from the blue LED 93 are reflected by the optical sheet 96 and return to the LED substrate 92 side. Since a reflection sheet that reflects light is generally attached to the surface of the LED substrate 92, the light 9 c reflected by the optical sheet 96 is further reflected by the LED substrate 92.
  • the reflected light 9 d is divided into light 9 e that passes through the optical sheet 96 and light 9 f that is reflected by the optical sheet 96 after passing through the phosphor sheet 95.
  • the light 9f reflected by the optical sheet 96 is reflected by the LED substrate 92
  • the light 9g reflected by the LED substrate 92 is divided into light 9h that passes through the optical sheet 96 and light 9i that is reflected by the optical sheet 96. .
  • the color of the light is yellowish every time it passes through the phosphor sheet 95. Therefore, when attention is paid to the emitted light from one blue LED 93, the color of the light becomes yellowish as the region is farther from the blue LED 93.
  • the color of the light 9e is more yellowish than the color of the light 9b
  • the color of the light 9h is more yellowish than the color of the light 9e.
  • the phosphor content (phosphor concentration) in the phosphor sheet 95 is adjusted so that the backlight becomes white light when the entire surface is turned on.
  • the amount of yellowish light that reaches the lighting area from other areas is smaller than when full lighting is performed.
  • the color of the backlight light appearing in the lighting area has a blue color, and the white balance is lost.
  • the range where partial lighting is performed is narrow.
  • the emitted light from the blue LED 93 reaches the surrounding area by repeating reflection, the light is irradiated to the non-lighting area when partial lighting is performed. At that time, the color of the light gradually becomes yellowish as the distance from the lighting area increases, and color unevenness occurs.
  • Japanese Patent Application Laid-Open No. 2015-216104 discloses an invention of a light source device that suppresses the spread of light by providing a suppressing member that divides a region of a light emitting surface. According to this light source device, the light emitted from the light source and transmitted through the conversion member (quantum dot) is suppressed from leaking to the adjacent region, and as a result, color unevenness and luminance unevenness are reduced.
  • the following disclosure aims to realize a direct type backlight device configured by combining a blue LED and quantum dots at low cost without causing color unevenness.
  • a light source device includes a light emitting device package including a blue light emitting device that emits blue light, and converts the wavelength of the light emitted from the blue light emitting device so that the color of the outgoing light is white.
  • a quantum dot-containing body containing quantum dots. The quantum dots are disposed immediately above the light emitting element package.
  • the light source device includes a light emitting element package including a blue light emitting element that emits blue light, and a wavelength of light emitted from the blue light emitting element so that a color of light emitted to the outside is white.
  • the jig includes a mounting portion that is positioned immediately above the light emitting device package and on which the quantum dot-containing body is mounted, and a support portion that is positioned around the light emitting device package and supports the mounting portion. The support part reflects or scatters the light emitted from the blue light emitting element.
  • the light source device includes a light emitting device package including a blue light emitting device that emits blue light, and a wavelength of light emitted from the blue light emitting device so that the color of light emitted to the outside is white.
  • the jig includes a mounting portion that is positioned immediately above the light emitting device package and on which the quantum dot-containing body is mounted, and a support portion that is positioned around the light emitting device package and supports the mounting portion.
  • the mounting portion is formed in a planar shape so as to cover the entire upper portion of the light emitting element package.
  • quantum dots are arranged at a position immediately above the light emitting element package or above the light emitting element package and relatively close to the light emitting element package. For this reason, the light emitted from the blue light emitting element is immediately converted into white light. As a result, white light is emitted from the light source device as in the case where a general white LED package is provided. Therefore, the light propagating through the backlight device becomes white light, and even if light reflection is repeated inside the device, yellowish light is not emitted. Therefore, color unevenness caused by repeated light reflection does not occur.
  • the quantum dots are not provided in a region corresponding to the entire display unit of the display device, but are provided only above each light emitting element package. For this reason, the amount of quantum dots required is reduced, and the manufacturing cost can be reduced. As described above, a light source device having a configuration in which a blue LED and a quantum dot are combined can be realized at low cost.
  • FIG. 6 is a flowchart illustrating an example of a procedure of local dimming processing in the first embodiment. In the said 1st Embodiment, it is a figure for demonstrating control of the light emission luminance by a local dimming process.
  • the said 1st Embodiment it is the schematic which shows the structure of the unit drive part for driving the blue LED contained in one area. It is a figure which shows the detailed structure of the light source device in the said 1st Embodiment. It is a figure which shows the example of 1 structure of the quantum dot sheet in the said 1st Embodiment. It is a figure for demonstrating that white light is radiate
  • the said 3rd Embodiment it is a figure for demonstrating the reason the whole jig
  • FIG. 1 is a block diagram illustrating an overall configuration of a liquid crystal display device including a backlight device 600 according to the first embodiment.
  • the liquid crystal display device includes a display control circuit 100, a gate driver (scanning signal line driving circuit) 200, a source driver (video signal line driving circuit) 300, a liquid crystal panel 400, a light source control unit 500, and a backlight device 600.
  • the liquid crystal panel 400 includes a display unit 410 for displaying an image. Note that the gate driver 200 and / or the source driver 300 may be provided in the liquid crystal panel 400.
  • the display unit 410 includes a plurality (n) of source bus lines (video signal lines) SL1 to SLn and a plurality (m) of gate bus lines (scanning signal lines) GL1 to GLm. It is installed.
  • a pixel forming portion 4 for forming pixels is provided corresponding to each intersection of the source bus lines SL1 to SLn and the gate bus lines GL1 to GLm.
  • the display unit 410 includes a plurality (m ⁇ n) of pixel forming units 4.
  • the plurality of pixel forming portions 4 are arranged in a matrix to form a pixel matrix.
  • Each pixel forming unit 4 includes a TFT (thin film transistor) which is a switching element having a gate terminal connected to a gate bus line GL passing through a corresponding intersection and a source terminal connected to a source bus line SL passing through the intersection.
  • TFT thin film transistor
  • the pixel electrode 41 connected to the drain terminal of the TFT 40, the common electrode 44 and the auxiliary capacitance electrode 45 provided in common to the plurality of pixel forming portions 4, the pixel electrode 41 and the common electrode 44, And a storage capacitor 43 formed by the pixel electrode 41 and the storage capacitor electrode 45 are included.
  • the liquid crystal capacitor 42 and the auxiliary capacitor 43 constitute a pixel capacitor 46.
  • the display unit 410 in FIG. 1 only components corresponding to one pixel forming unit 4 are shown.
  • an oxide TFT (a thin film transistor using an oxide semiconductor for a channel layer) can be employed. More specifically, In—Ga—Zn—O (indium gallium zinc oxide) which is an oxide semiconductor mainly containing indium (In), gallium (Ga), zinc (Zn), and oxygen (O) is used.
  • In—Ga—Zn—O—TFT indium gallium zinc oxide
  • a TFT in which a channel layer is formed hereinafter referred to as “In—Ga—Zn—O—TFT”
  • In—Ga—Zn—O—TFT an In—Ga—Zn—O—TFT
  • a transistor in which an oxide semiconductor other than In—Ga—Zn—O (indium gallium zinc oxide) is used for a channel layer can be employed.
  • an oxide semiconductor other than In—Ga—Zn—O indium gallium zinc oxide
  • at least one of indium, gallium, zinc, copper (Cu), silicon (Si), tin (Sn), aluminum (Al), calcium (Ca), germanium (Ge), and lead (Pb) is included.
  • TFTs other than oxide TFTs is not excluded.
  • the display control circuit 100 receives an image signal DAT sent from the outside and a timing signal group TG such as a horizontal synchronizing signal and a vertical synchronizing signal, and receives a digital video signal DV and a gate start pulse for controlling the operation of the gate driver 200.
  • the signal BS is output.
  • the gate driver 200 Based on the gate start pulse signal GSP and the gate clock signal GCK sent from the display control circuit 100, the gate driver 200 applies the active scanning signals G (1) to G (m) to the gate bus lines GL1 to GLm. The application is repeated with one vertical scanning period as a cycle.
  • the source driver 300 receives the digital video signal DV, the source start pulse signal SSP, the source clock signal SCK, and the latch strobe signal LS sent from the display control circuit 100, and drives the video signal S (1 (1) to the source bus lines SL1 to SLn. ) To S (n) are applied. At this time, the source driver 300 sequentially holds the digital video signal DV indicating the voltage to be applied to the source bus lines SL1 to SLn at the timing when the pulse of the source clock signal SCK is generated. The held digital video signal DV is converted into an analog voltage at the timing when the pulse of the latch strobe signal LS is generated. The converted analog voltage is applied simultaneously to all the source bus lines SL1 to SLn as drive video signals S (1) to S (n).
  • the light source control unit 500 controls the luminance (light emission intensity) of the light source device in the backlight device 600 based on the light source control signal BS sent from the display control circuit 100.
  • the backlight device 600 irradiates the back surface of the liquid crystal panel 400 with the backlight light.
  • local dimming processing is performed.
  • the scanning signals G (1) to G (m) are applied to the gate bus lines GL1 to GLm, and the driving video signals S (1) to S (n) are applied to the source bus lines SL1 to SLn. Then, by controlling the luminance of the light source device in the backlight device 600, an image corresponding to the image signal DAT sent from the outside is displayed on the display unit 410.
  • FIG. 2 is a perspective view of the liquid crystal panel 400 and the backlight device 600.
  • FIG. 3 is a side view of the liquid crystal panel 400 and the backlight device 600.
  • the backlight device 600 is provided on the back surface of the liquid crystal panel 400. That is, the backlight device 600 in the present embodiment is a direct type backlight device.
  • the backlight device 600 includes a chassis 61, an LED substrate 62, a plurality of light source devices 63, a diffusion plate 64, and an optical sheet 65.
  • Each light source device 63 includes a blue LED 631 and quantum dots 632.
  • the chassis 61 supports the LED substrate 62 and the like.
  • the LED substrate 62 is a metal substrate, for example, and has a plurality of light source devices 63 mounted thereon.
  • a reflective sheet is attached to the surface of the LED substrate 62 in order to increase the utilization efficiency of the light emitted from the light source device 63.
  • the blue LED 631 emits blue light.
  • the quantum dot 632 converts the wavelength of the light emitted from the blue LED 631 so that the emitted light from the light source device 63 becomes white light.
  • the diffusing plate 64 is disposed at a position several millimeters to several centimeters above the light source device 63.
  • the diffusion plate 64 diffuses the light emitted from the light source device 63 so that the backlight light becomes surface-uniform light.
  • the optical sheet 65 is disposed above the diffusion plate 64.
  • the optical sheet 65 is composed of a plurality of sheets. Each of the plurality of sheets has a function of diffusing light, a light condensing function, a function of improving light use efficiency, and the like. A detailed description of the configuration of the light source device 63 will be given later.
  • the display unit 410 that displays an image logically controls a plurality of areas (not physically) (not physically) as shown in FIG.
  • the area is the smallest unit to be performed).
  • a light source device 63 is provided on the LED substrate 62 so as to correspond to each area, and the luminance (light emission intensity) of the light source device 63 is controlled for each area.
  • the number of light source devices 63 provided in each area is not particularly limited.
  • the local dimming process is performed by a local dimming processing unit (not shown) in the display control circuit 100 (see FIG. 1).
  • display unit 410 is divided into (vertical p ⁇ horizontal q) areas.
  • an image signal DAT sent from the outside is input to the local dimming processing unit as input image data (step S11).
  • the input image data includes the luminance (luminance data) of (m ⁇ n) pixels.
  • the local dimming processing unit performs sub-sampling processing (averaging processing) on the input image data to obtain a reduced image including the luminance of (sp ⁇ sq) (s is an integer of 2 or more) pixels.
  • the local dimming processing unit divides the reduced image into (p ⁇ q) area data (step S13). The data of each area includes the luminance of (s ⁇ s) pixels.
  • the local dimming processing unit obtains the maximum luminance value Ma of the pixels in the area and the average luminance value Me of the pixels in the area for each of the (p ⁇ q) areas (step S14). .
  • the local dimming processing unit is the light emission luminance (light emission luminance of the blue LED 631) of the light source device 63 corresponding to each area (p ⁇ q) based on the maximum value Ma, the average value Me, and the like obtained in step S14.
  • the individual light emission luminances are obtained (step S15).
  • the local dimming processing unit obtains (tp ⁇ tq) display luminances (t is an integer of 2 or more) based on the (p ⁇ q) emission luminances obtained in step S15 (step S16).
  • the local dimming processing unit obtains backlight luminance data including (m ⁇ n) display luminances by performing linear interpolation processing on (tp ⁇ tq) display luminances (step S17).
  • the backlight luminance data represents the luminance of light incident on (m ⁇ n) pixels when all the light source devices 63 emit light with the light emission luminance obtained in step S15.
  • the local dimming processing unit divides the luminance of (m ⁇ n) pixels included in the input image by (m ⁇ n) display luminances included in the backlight luminance data, respectively ( The light transmittance in m ⁇ n) pixels is obtained (step S18). Finally, the local dimming processing unit causes the digital video signal DV corresponding to the data representing the light transmittance obtained in step S18 and the light source device 63 corresponding to each area to emit light with the light emission luminance obtained in step S15.
  • the light source control signal BS is output (step S19).
  • light having different luminance is emitted for each area as schematically shown in FIG.
  • the brightness of light is indicated by the thickness of the arrow.
  • FIG. 7 is a schematic diagram showing the configuration of the unit drive unit 50 for driving the blue LEDs 631 included in one area.
  • FIG. 7 shows an example in which four light source devices 63 are provided in one area, that is, an example in which four blue LEDs 631 are provided in one area.
  • the unit driving unit 50 includes a power source 52 and a current control transistor 54.
  • the current control transistor 54 the light source control signal BS is given to the gate terminal, the drain terminal is connected to the blue LED 631, and the source terminal is grounded.
  • Four blue LEDs 631 are connected in series between the power supply 52 and the drain terminal of the current control transistor 54.
  • the light source control signal BS corresponding to the target luminance (light emission intensity) of the blue LED 631 is applied to the gate terminal of the current control transistor 54. Thereby, the drive current Im according to the target luminance of the blue LED 631 flows.
  • FIG. 8 is a diagram showing a detailed configuration of the light source device 63 in the present embodiment.
  • the light source device 63 in this embodiment includes a blue LED 631, a package substrate 633, a reflector 634, bonding wires 635a and 635b, electrodes 636a and 636b, a quantum dot sheet 637 including quantum dots 632, a jig 638, and the like. It is constituted by.
  • the blue LED 631, the package substrate 633, the reflector 634, the bonding wires 635a and 635b, and the electrodes 636a and 636b constitute one LED package 631P.
  • the blue LED 631 is provided on the package substrate 633 and is covered with a sealing material such as resin.
  • a reflector 634 for reflecting light is provided in a region around the blue LED 631 on the package substrate 633.
  • the anode of the blue LED 631 is connected to the electrode 636a through the bonding wire 635a, and the cathode of the blue LED 631 is connected to the electrode 636b through the bonding wire 635b.
  • a jig 638 is provided around the LED package 631P, and the quantum dot sheet 637 is fixed above the LED package 631P (above the blue LED 631) by the jig 638.
  • the jig 638 is provided with a convex portion 6381 that is horizontal to the substrate surface, and a quantum dot sheet 637 is fixed on the convex portion 6381.
  • the quantum dot sheet 637 including the quantum dots 632 is disposed immediately above the LED package 631P.
  • the jig 638 is made of white polycarbonate.
  • sheet-like glass enclosing the quantum dots 632 may be disposed above the LED package 631P.
  • the quantum dot sheet 637 in this embodiment includes a resin film 70, a moisture-resistant barrier film (protective film) 72a that covers the surface of the resin film 70, and a moisture-resistant barrier film (protective film) that covers the back surface of the resin film 70. 72b.
  • the resin film 70 is made of a resin 71 in which quantum dots 632 are encapsulated.
  • quantum dots 632 for example, green quantum dots having an emission peak wavelength of 500 to 550 nm and red quantum dots having an emission peak wavelength of 600 nm or more are enclosed in the resin 71.
  • the quantum dots 632 are protected by the barrier films 72a and 72b.
  • the light (blue light LB) emitted from the blue LED 631 of each light source device 63 is converted into white light LW by the quantum dots 632 in the quantum dot sheet 637.
  • the jig 638 is made of white polycarbonate, the jig 638 shines white as a whole when light is scattered by the quantum dot sheet 637 or the jig 638.
  • the white light LW is emitted from each light source device 63 toward the diffusion plate 64.
  • the liquid crystal panel 400 is irradiated with white light.
  • a light emitting device package is realized by the LED package 631P, and a quantum dot containing body is realized by the quantum dot sheet 637.
  • the quantum dots 632 are included directly above the LED package 631P, that is, at a position relatively close to the blue LED 631.
  • a quantum dot sheet 637 is disposed. For this reason, the light emitted from the blue LED 631 is immediately converted into white light.
  • the jig 638 for placing the quantum dot sheet 637 directly above the LED package 631P is formed of white polycarbonate. For this reason, the jig 638 shines white by the light scattered by the quantum dot sheet 637 and the jig 638.
  • the light source device 63 emits white light as in the case where a general white LED package is provided. Accordingly, the light propagating in the backlight device 600 is white light, and even if the light is repeatedly reflected inside the device, yellowish light is emitted around the lighting area when partial lighting is performed. It will never be done. Therefore, even when the local dimming process is performed using the backlight device 600 according to the present embodiment, color unevenness due to repeated light reflection does not occur.
  • the jig 638 is only provided in the vicinity of the LED package 631P.
  • the area of the region surrounded by the jig 638 in this embodiment is larger than the area of the region surrounded by the suppression member in the conventional configuration. It is extremely small, and the height of the jig 638 in this embodiment is extremely lower than the height of the suppressing member in the conventional configuration.
  • a physical member serving as a wall is not provided at the boundary portion of the area.
  • the quantum dot sheet 637 is disposed at a position relatively close to the blue LED 631 as described above, but the quantum dot sheet 637 is disposed at a position away from the blue LED 631 as compared with the surface mount type configuration shown in FIG. As can be understood from FIG. 8, an air layer is also present between the blue LED 631 and the quantum dot sheet 637. For this reason, the quantum dot 632 is not deteriorated by the influence of heat.
  • the quantum dots 632 are protected by moisture-resistant barrier films 72a and 72b. For this reason, the quantum dot 632 is not deteriorated by the influence of humidity.
  • each LED package 631P (each The quantum dots 632 are provided only near the blue LED 631). For this reason, the amount of quantum dots 632 required is relatively small. As described above, the manufacturing cost can be reduced.
  • the direct type backlight device 600 having the light source device 63 configured by combining the blue LED 631 and the quantum dot 632 can be realized at low cost without causing color unevenness. it can.
  • liquid crystal display device In the liquid crystal display device according to this embodiment, local dimming processing is performed. That is, the emission intensity of the blue LED 631 is controlled for each area. For this reason, power consumption can be reduced. In addition, it is possible to expand the dynamic range by causing the blue LED 631 to emit light with strong emission intensity intensively in the high gradation portion.
  • each light source device 63 is provided with a jig 638 for placing a quantum dot sheet 637 (or a sheet-like glass encapsulating the quantum dots 632) directly above the LED package 631P. (See FIG. 8).
  • a heat dissipating filler such as alumina (heat dissipating filler) may be kneaded therein. Thereby, heat generated by light emission of the blue LED 631 is radiated to the LED substrate 62 via the jig 638. As a result, deterioration of the quantum dots 632 due to heat is effectively suppressed.
  • the jig 638 is made of polycarbonate.
  • the jig 638 is formed of a metal (for example, copper) having excellent heat dissipation.
  • the heat generated by the light emission of the blue LED 631 is dissipated to the LED substrate 62 via the jig 638, as in the first modification.
  • deterioration of the quantum dots 632 due to heat is effectively suppressed.
  • the jig 638 for placing the quantum dot sheet 637 (or, for example, a sheet-like glass encapsulating the quantum dots 632) directly above the LED package 631P is made of a highly reflective resin (light reflective). Resin).
  • the resin having high reflectance include polyester in addition to the polycarbonate described above. According to such a modification, blue light emitted from the blue LED 631 is prevented from leaking from the jig 638 without passing through the quantum dot sheet 637 (or a sheet-like glass enclosing the quantum dots 632). can do.
  • the jig 638 for placing the quantum dot sheet 637 (or, for example, a sheet-like glass encapsulating the quantum dots 632) immediately above the LED package 631P is a highly reflective metal (light reflective property). Metal). Examples of the metal having high reflectivity include aluminum and silver. According to this modification, blue light emitted from the blue LED 631 passes through the quantum dot sheet 637 (or a sheet-like glass enclosing the quantum dots 632), as in the third modification. And leakage from the jig 638 can be suppressed.
  • Second Embodiment> A second embodiment will be described.
  • the overall configuration, the outline of the backlight device 600 having the device device 63, the procedure of the local dimming process, and the driving of the backlight device 600 are the same as those in the first embodiment, and the description thereof is omitted (FIG. 1). (See FIG. 7).
  • FIG. 11 is a diagram showing a detailed configuration of the light source device 63 in the present embodiment.
  • the light source device 63 in the present embodiment includes a blue LED 631, a package substrate 633, a reflector 634, bonding wires 635a and 635b, electrodes 636a and 636b, and a glass member 639 containing quantum dots.
  • the blue LED 631, the package substrate 633, the reflector 634, the bonding wires 635a and 635b, and the electrodes 636a and 636b constitute one LED package 631P.
  • the glass member 639 includes a lens 639a enclosing the quantum dots 632 and a leg portion 639b for fixing the lens 639a directly above the LED package 631P.
  • the blue LED 631 is provided on the package substrate 633 and is covered with a sealing material such as resin.
  • a reflector 634 for reflecting light is provided in a region around the blue LED 631 on the package substrate 633.
  • the anode of the blue LED 631 is connected to the electrode 636a through the bonding wire 635a, and the cathode of the blue LED 631 is connected to the electrode 636b through the bonding wire 635b.
  • the quantum dot 632 is disposed at a position immediately above the LED package 631P.
  • a resin member having the same configuration may be provided.
  • the light (blue light LB) emitted from the blue LED 631 of each light source device 63 is converted into white light LW by the quantum dots 632 enclosed in the lens 639a.
  • the lens 639a since the lens 639a is used, the emitted light from the light source device 63 is effectively diffused. Then, the diffused light enters the diffusion plate 64, and as a result, the liquid crystal panel 400 is irradiated with white light.
  • a light emitting device package is realized by the LED package 631P
  • a quantum dot containing body is realized by the glass member 639
  • a quantum dot holding unit is realized by the lens 639a.
  • the quantum dots 632 are encapsulated immediately above the LED package 631P, that is, at a position relatively close to the blue LEDs 631.
  • a lens 639a is disposed.
  • the light emitted from the blue LED 631 is immediately converted into white light.
  • the white light is diffused by the lens 639 a and emitted from the light source device 63.
  • the light propagating through the backlight device 600 is white light, and even if the light is repeatedly reflected inside the device, the partial lighting is performed when the partial lighting is performed.
  • the surrounding area is not irradiated with yellowish light. Therefore, even when the local dimming process is performed using the backlight device 600 according to the present embodiment, color unevenness due to repeated light reflection does not occur.
  • a physical member serving as a wall is not provided at the boundary portion of the area. For this reason, even if there is an individual difference (variation) with respect to the blue LED 631 or the quantum dot 632, the occurrence of color unevenness and luminance unevenness due to such individual differences is suppressed by mixing light between adjacent areas.
  • the lens 639a enclosing the quantum dot 632 is disposed at a position relatively close to the blue LED 631, but the quantum dot 632 is separated from the blue LED 631 as compared with the surface mount type configuration shown in FIG. As is understood from FIG. 11, an air layer is also present between the blue LED 631 and the quantum dot 632. For this reason, as in the first embodiment, the quantum dots 632 are not deteriorated by the influence of heat.
  • the structure is not complicated.
  • the quantum dots 632 are provided only in the vicinity immediately above each LED package 631P (each blue LED 631). For this reason, as in the first embodiment, the manufacturing cost can be reduced.
  • the direct-type backlight device 600 having the light source device 63 configured by combining the blue LED 631 and the quantum dots 632 causes uneven color. And can be realized at low cost.
  • FIG. 13 is a diagram illustrating a detailed configuration of the light source device according to the modification of the second embodiment.
  • the lens 639a is provided on the LED package 631P so that the white light emitted from the light source device 63 is effectively diffused.
  • the present invention is not limited to this, and as shown in FIG. 13, a sheet-like glass 639 c enclosing the quantum dots 632 is provided on the LED package 631 ⁇ / b> P, and a scattering agent (for example, scattering particles or foams) is provided in the glass 639 c. ) 79 may be mixed to diffuse white light.
  • a scattering agent for example, scattering particles or foams
  • FIG. 14 is a diagram showing a detailed configuration of the light source device 63 in the present embodiment.
  • the light source device 63 in this embodiment includes a blue LED 631, a package substrate 633, a reflector 634, bonding wires 635a and 635b, electrodes 636a and 636b, a quantum dot sheet 637 including quantum dots 632, a jig 638, and the like. It is constituted by.
  • the blue LED 631, the package substrate 633, the reflector 634, the bonding wires 635a and 635b, and the electrodes 636a and 636b constitute one LED package 631P.
  • the shape of the jig 638 is different from that of the first embodiment (see FIG. 8).
  • the quantum dot sheet 637 has the same configuration as that of the first embodiment (see FIG. 9).
  • the jig 638 in this embodiment will be described in detail with reference to FIGS.
  • the jig 638 is made of resin and has an H-shaped cross section as shown in FIGS.
  • the jig 638 includes a placement portion 638a for placing the quantum dot sheet 637 and a support portion 638b that supports the placement portion 638a (see FIG. 15).
  • the mounting portion 638a is formed in a planar shape so as to cover the entire upper portion of one LED package 631P (see FIGS. 14 and 15).
  • the support portion 638b is formed so as to surround the periphery of one LED package 631P.
  • the support portion 638b includes a fixed leg portion 682 positioned below the coupling portion 638p with the mounting portion 638a and a holding frame portion 683 positioned above the coupling portion 638p with the mounting portion 638a (see FIG. 16).
  • the fixed leg 682 is fixed to the LED substrate 62 (see FIG. 3). With such a configuration, a recess 684 that is a space for placing the quantum dot sheet 637 is formed above the placement portion 638a.
  • the blue LED 631 is provided on the package substrate 633 and is covered with a sealing material such as resin.
  • a reflector 634 for reflecting light is provided in a region around the blue LED 631 on the package substrate 633.
  • the anode of the blue LED 631 is connected to the electrode 636a through the bonding wire 635a, and the cathode of the blue LED 631 is connected to the electrode 636b through the bonding wire 635b.
  • the jig 638 having the above-described configuration is provided around the LED package 631P, and the quantum dot sheet 637 is fixed to the placement portion 638a of the jig 638.
  • the quantum dot sheet 637 including the quantum dots 632 is arranged on the mounting portion 638a (of the jig 638) located immediately above the LED package 631P.
  • the quantum dot sheet 637 for example, sheet-like glass enclosing the quantum dots 632 may be placed on the placement portion 638a of the jig 638.
  • the support portion 638b of the jig 638 has a configuration for reflecting or scattering light emitted from the blue LED 631.
  • the inner surface of the fixed leg portion 682 (the shaded portion denoted by reference numeral 681 in FIG. 14) of the support portion 638b reflects or scatters the light emitted from the blue LED 631. It is formed as follows. More specifically, roughening treatment (surface of the object to be processed) such as blasting (processing the surface of the object to be processed by spraying an abrasive at a high speed) on the inner surface of the fixed leg 682. Is applied). Accordingly, the inner surface of the fixed leg portion 682 is not a smooth surface, but is a rough surface as schematically shown in FIG. In the present embodiment, the entire jig 638 is transparent.
  • the mounting portion 638a of the jig 638 does not have the space portion 901 as shown in FIG. 18 is that liquid quantum dots are attached to the jig 638 (see FIG. This is because it is possible to adopt a method of injecting into the recesses 684) and baking them.
  • the method for manufacturing the light source device 63 is not particularly limited.
  • the entire jig 638 is transparent. However, if the entire jig 638 is made of a reflective material or a scattering agent, the light emitted from the blue LED 631 is used. As shown in FIG.
  • the component reflected by the mounting portion 638a of the jig 638 increases as indicated by the arrow denoted by reference numeral 902 in FIG.
  • the light component incident on the quantum dot sheet 637 decreases, and the light use efficiency decreases.
  • the entire jig 638 is made transparent without performing the above-described roughening process, not all the components of the light are reflected by the reflector 634 even if the reflector 634 is provided. Therefore, with respect to the light emitted from the blue LED 631, a component leaking from the side surface of the jig 638 increases as indicated by the arrow denoted by reference numeral 903 in FIG. Therefore, the light use efficiency is reduced.
  • blue light emitted from the blue LED 631 of each light source device 63 through the mounting portion 638 a of the jig 638.
  • components that are scattered on the inner surface of the fixed leg portion 682 of the jig 638 scattered portion marked with reference numeral 681 and enter the quantum dot sheet 637 (reference numeral 74) (See the attached arrow).
  • the blue light emitted from the blue LED 631 is efficiently incident on the quantum dot sheet 637, and the blue light is converted into white light by the quantum dots 632. In this way, white light is emitted from each light source device 63 toward the diffusion plate 64.
  • the liquid crystal panel 400 is irradiated with white light.
  • a light emitting device package is realized by the LED package 631P, and a quantum dot containing body is realized by the quantum dot sheet 637.
  • a jig 638 for fixing a quantum dot sheet 637 containing the quantum dots 632 is provided in the backlight device 600 having the light source device 63 configured using the blue LEDs 631 and the quantum dots 632. It is done.
  • the jig 638 includes a mounting portion 638a positioned immediately above the LED package 631P including the blue LED 631 and a support portion 638b that supports the mounting portion 638a.
  • a quantum dot sheet is formed on the mounting portion 638a. 637 is arranged.
  • the quantum dot sheet 637 is disposed above the blue LED 631 and at a position relatively close to the blue LED 631.
  • the light emitted from the blue LED 631 is immediately converted into white light.
  • the inner surface of the fixed leg portion 682 in the support portion 638b constituting the jig 638 is subjected to a roughening process.
  • the light emitted from the blue LED 631 there are many components incident on the quantum dot sheet 637 without leaking from the side surface of the jig 638.
  • the light emitted from the blue LED 631 is efficiently incident on the quantum dot sheet 637. In this way, the utilization efficiency of light emitted from the blue LED 631 is increased. Therefore, the light emitted from the blue LED 631 is efficiently converted into white light.
  • a physical member serving as a wall is not provided at the boundary portion of the area. For this reason, even if there is an individual difference (variation) with respect to the blue LED 631 or the quantum dot 632, the occurrence of color unevenness and luminance unevenness due to such individual differences is suppressed by mixing light between adjacent areas.
  • the quantum dot sheet 637 is disposed at a position relatively close to the blue LED 631 as described above, but the quantum dot sheet 637 is disposed at a position away from the blue LED 631 as compared with the surface mount type configuration shown in FIG. As can be understood from FIG. 14, there is also a placement portion 638 a of the jig 638, that is, a resin layer, between the blue LED 631 and the quantum dot sheet 637. For this reason, the quantum dot 632 is not deteriorated by the influence of heat.
  • the quantum dots 632 are protected by moisture-resistant barrier films 72a and 72b. For this reason, the quantum dot 632 is not deteriorated by the influence of humidity.
  • the structure is not complicated.
  • the quantum dots 632 are provided only near the upper part of each LED package 631P (each blue LED 631). For this reason, as in the first embodiment, the manufacturing cost can be reduced.
  • the direct-type backlight device 600 having the light source device 63 configured by combining the blue LED 631 and the quantum dots 632 causes uneven color. And can be realized at low cost.
  • the light (blue light) emitted from the blue LED 631 and transmitted through the reflector 634 is reflected by the reflective paint on the inner surface of the fixed leg 682 of the jig 638 and is applied to the quantum dot sheet 637.
  • the incident component see the arrow denoted by reference numeral 74 in FIG. 21
  • the utilization efficiency of the light emitted from the blue LED 631 can also be improved by applying the reflective paint to the inner surface of the fixed leg portion 682 of the jig 638.
  • the utilization efficiency of the light emitted from the blue LED 631 can also be improved by processing the inner surface of the fixed leg portion 682 of the jig 638 in a jagged shape.
  • the jagged shape was described as an example here, the shape is not limited to the jagged shape as long as the light emitted from the blue LED 631 can be reflected or scattered.
  • the entire jig 638 is transparent.
  • the entire jig 638 containing a thin scattering agent inside by using a jig 638 containing a thin scattering agent inside, the entire jig 638 is milky white as shown in FIG. In FIG. 24, the entire jig 638 is milky white by hatching the portion representing the jig 638.
  • the light (blue light) emitted from the blue LED 631 and transmitted through the reflector 634 and the portion subjected to the roughening treatment is scattered inside the jig 638 and is scattered in the quantum dot sheet 637.
  • the number of components incident on the head increases.
  • the jig 638 containing the scattering agent inside it is possible to further increase the utilization efficiency of the light emitted from the blue LED 631.
  • the light emitted from the blue LED 631 is used by adopting the jig 638 containing a scattering agent therein. Efficiency can be further increased.
  • FIG. 26 is a diagram showing a detailed configuration of the light source device 63 in the present embodiment.
  • the light source device 63 in the present embodiment includes a blue LED 631, a package substrate 633, a reflector 634, bonding wires 635a and 635b, electrodes 636a and 636b, a quantum dot sheet 637 including quantum dots 632, a jig 638, and the like. It is constituted by.
  • the blue LED 631, the package substrate 633, the reflector 634, the bonding wires 635a and 635b, and the electrodes 636a and 636b constitute one LED package 631P.
  • the shape of the jig 638 is the same as that of the third embodiment. Hereinafter, differences from the third embodiment will be described.
  • the inner surface of the fixed leg 682 of the support portion 638b constituting the jig 638 emits from the blue LED 631. It was formed to reflect or scatter the emitted light.
  • the outer surface of the support portion 638b constituting the jig 638 reflects the light emitted from the blue LED 631 in order to increase the utilization efficiency of the light emitted from the blue LED 631. Or it is formed so as to be scattered.
  • the outer surface of the support portion 638b constituting the jig 638 is not a smooth surface but is typically a rough surface as shown in FIG. Also in the present embodiment, the entire jig 638 is transparent.
  • the roughening process may be performed with respect to the outer surface of only the part corresponding to the fixed leg part 682 in the support part 638b.
  • a roughening process is performed on the outer surface of the support portion 638b constituting the jig 638. For this reason, with respect to the light emitted from the blue LED 631, there are many components that enter the quantum dot sheet 637 without leaking from the side surface of the jig 638 (see the arrow denoted by reference numeral 77 in FIG. 28). Thereby, the light emitted from the blue LED 631 is efficiently incident on the quantum dot sheet 637. Thus, the utilization efficiency of the light emitted from the blue LED 631 is increased. Further, similarly to the third embodiment, the quantum dot sheet 637 is disposed above the blue LED 631 and at a position relatively close to the blue LED 631.
  • the light emitted from the blue LED 631 is immediately and efficiently converted into white light.
  • the light emitted from the light source device 63 and propagating through the backlight device 600 becomes white light, and even if the light is repeatedly reflected inside the device, when the partial lighting is performed, There is no yellowish light. Therefore, even when the local dimming process is performed, color unevenness due to repeated reflection of light does not occur.
  • the quantum dots 632 are provided only near the upper part of each LED package 631P (each blue LED 631), the amount of the required quantum dots 632 is relatively small. Therefore, the manufacturing cost can be reduced.
  • the backlight device 600 having the light source device 63 configured by combining the blue LEDs 631 and the quantum dots 632 can be realized at low cost without causing color unevenness.
  • the outer surface of the support portion 638b (a mesh denoted by reference numeral 686 in FIG. 26).
  • a configuration in which a roughening process is performed on the hanging portion) is employed.
  • the reflective paint is applied to the outer surface of the support portion 638b constituting the jig 638.
  • the light (blue light) emitted from the blue LED 631 and transmitted through the reflector 634 is reflected by the reflective paint on the outer surface of the support portion 638b constituting the jig 638, and the quantum dot sheet 637.
  • the number of components incident on increases.
  • the utilization efficiency of the light emitted from the blue LED 631 can also be improved by applying the reflective paint to the outer surface of the support portion 638b of the jig 638.
  • the utilization efficiency of the light emitted from the blue LED 631 can also be improved by processing the outer surface of the fixed leg portion 682 of the jig 638 in a jagged shape.
  • the jagged shape was described as an example here, the shape is not limited to the jagged shape as long as the light emitted from the blue LED 631 can be reflected or scattered.
  • the entire jig 638 is transparent.
  • the jig 638 containing a thin scattering agent inside is employed, so that the entire jig 638 is milky white. It has become.
  • the third modification of the third embodiment it is possible to further increase the utilization efficiency of the light emitted from the blue LED 631.
  • FIG. 31 is a diagram showing a detailed configuration of the light source device 63 in the present embodiment. Similar to the light source device 63 in the first embodiment, the light source device 63 in the present embodiment is a blue LED 631, a package substrate 633, a reflector 634, bonding wires 635a and 635b, electrodes 636a and 636b, and quantum dots. A quantum dot sheet 637 including 632 and a jig 638 are included.
  • the blue LED 631, the package substrate 633, the reflector 634, the bonding wires 635a and 635b, and the electrodes 636a and 636b constitute one LED package 631P.
  • the shape of the jig 638 is the same as that of the third embodiment.
  • the support 638b constituting the jig 638 is configured to reflect or scatter the light emitted from the blue LED 631.
  • the element is not provided. About other points, it is the same as that of the said 3rd Embodiment and the said 4th Embodiment.
  • the use efficiency of light emitted from the blue LED 631 is reduced as compared with the third embodiment and the fourth embodiment.
  • the quantum dot sheet 637 is disposed above the blue LED 631 and at a position relatively close to the blue LED 631 as in the third embodiment and the fourth embodiment. For this reason, the light emitted from the blue LED 631 is immediately converted into white light. As a result, the light emitted from the light source device 63 and propagating through the backlight device 600 becomes white light, and even if the light is repeatedly reflected inside the device, when the partial lighting is performed, There is no yellowish light.
  • the quantum dots 632 are provided only near the upper part of each LED package 631P (each blue LED 631), the amount of the required quantum dots 632 is relatively small. Therefore, the manufacturing cost can be reduced.
  • the direct type backlight device 600 having a configuration in which the blue LED 631 and the quantum dot 632 are combined can be realized at low cost without causing color unevenness.
  • the mounting portion 638a constituting the jig 638 is formed in a planar shape so as to cover the entire upper portion of one LED package 631P without having the space portion 901 as shown in FIG. Therefore, when the light source device 63 is manufactured, it is possible to adopt a method of injecting liquid quantum dots into the jig 638 (specifically, the recess 684 in FIG. 16) and baking them.
  • the local dimming process is performed, but the present invention is not limited to this.
  • the present invention can also be applied to a liquid crystal display device that is not subjected to local dimming processing.
  • a direct type backlight device has been described as an example, but the present invention is not limited to this.
  • the present invention can also be applied to a backlight device other than the direct type backlight device. .
  • the liquid crystal display device has been described as an example, but the present invention is not limited to this.
  • the present invention can be applied to a display device other than a liquid crystal display device as long as the display device includes a backlight device.
  • the mounting portion 638a constituting the jig 638 is formed in a planar shape so as to cover the entire upper portion of the LED package 631P.
  • the shape in the first embodiment that is, the mounting portion a constituting the jig 638 is a space portion as shown in FIG. 901
  • the support portion 638b constituting the jig 638 is configured to reflect or scatter light emitted from the blue LED 631, thereby increasing the utilization efficiency of the light emitted from the blue LED 631. It becomes possible.
  • a light emitting device package including a blue light emitting device emitting blue light; A quantum dot-containing body containing a quantum dot that converts the wavelength of light emitted from the blue light-emitting element so that the color of light emitted to the outside is white; The quantum dot is disposed immediately above the light emitting device package.
  • quantum dots are arranged immediately above the light emitting element package. For this reason, the light emitted from the blue light emitting element is immediately converted into white light. As a result, white light is emitted from the light source device as in the case where a general white LED package is provided. Further, the quantum dots are not provided in a region corresponding to the entire display unit of the display device, but are provided only directly above each light emitting element package. For this reason, the amount of quantum dots required is reduced, and the manufacturing cost can be reduced. As described above, a light source device having a configuration in which a blue LED and a quantum dot are combined can be realized at low cost.
  • Appendix 2 The light source device according to appendix 1, wherein an air layer is formed between the blue light emitting element and the quantum dots.
  • appendix 3 The light source device according to appendix 1, further comprising a jig provided around the light emitting device package in order to dispose the quantum dot-containing body immediately above the light emitting device package.
  • the jig is only provided in the vicinity of the light emitting device package, and a physical member serving as a wall is provided at the boundary of the area (when the local dimming process is performed). is not. For this reason, even if there are individual differences (variations) in blue light emitting elements and quantum dots, light is mixed between adjacent areas, thereby suppressing the occurrence of color unevenness and luminance unevenness due to such individual differences.
  • the jig shines white by the light scattered in the light source device.
  • the light propagating through the backlight device can be effectively whitened.
  • Appendix 5 The light source device according to appendix 3, wherein the jig is made of a light reflecting resin.
  • the blue light emitted from the blue light emitting element can be prevented from leaking from the jig without passing through the quantum dot-containing body.
  • Appendix 6 The light source device according to appendix 3, wherein the jig is made of a light reflective metal.
  • the quantum dot-containing body is A quantum dot holding unit for holding the quantum dots therein; 2.
  • the legs of the quantum dot-containing body are only provided in the vicinity of the light-emitting element package, and a physical wall that forms a wall at the boundary of the area (when the local dimming process is performed) The member is not provided. Therefore, the same effect as the configuration described in Appendix 3 can be obtained.
  • Appendix 8 The light source device according to appendix 1, wherein the quantum dot holding unit is formed by a lens.
  • the light converted into white by the quantum dots is effectively diffused by the lens.
  • the light propagating through the backlight device can be effectively whitened.
  • Appendix 9 The light source device according to appendix 1, wherein the quantum dot holding unit contains a light scattering agent.
  • a light emitting device package including a blue light emitting device emitting blue light; A quantum dot-containing body containing a quantum dot that converts the wavelength of light emitted from the blue light-emitting element so that the color of light emitted to the outside is white; A jig for fixing the quantum dot-containing body above the light emitting device package; The jig is Located on the light emitting device package, a placement part on which the quantum dot-containing body is placed, and It is located around the light emitting device package, and includes a support part that supports the mounting part. The light source device, wherein the support part reflects or scatters light emitted from the blue light emitting element.
  • a jig for fixing a quantum dot-containing body containing quantum dots is provided in a light source device including a blue light emitting element and quantum dots.
  • the jig is composed of a mounting part located directly above the light emitting element package including the blue light emitting element and a support part that supports the mounting part, and the quantum dot containing body is disposed on the mounting part.
  • the quantum dots are arranged above the blue light emitting element and at a position relatively close to the blue light emitting element. For this reason, the light emitted from the blue light emitting element is immediately converted into white light. As a result, white light is emitted from the light source device as in the case where a general white LED package is provided.
  • the quantum dots are not provided in a region corresponding to the entire display unit of the display device, but are provided only above each light emitting element package. For this reason, the amount of quantum dots required is reduced, and the manufacturing cost can be reduced.
  • a light source device having a configuration in which a blue light emitting element and a quantum dot are combined can be realized at low cost.
  • tool is comprised so that the light emitted from the blue light emitting element may be reflected or scattered. For this reason, the component which injects into a quantum dot containing body, without leaking from the side surface of a jig
  • the support portion includes a fixed leg portion positioned below a coupling portion with the mounting portion, and a holding frame portion positioned above a coupling portion with the mounting portion, The light source device according to appendix 10, wherein an inner surface of the fixed leg portion is formed so as to reflect or scatter light emitted from the blue light emitting element.
  • Appendix 12 12. The light source device according to appendix 11, wherein the inner surface of the fixed leg portion is subjected to a roughening process for roughening the surface.
  • the light emitted from the blue light emitting element toward the side surface of the jig is reflected on the surface of the fixing leg portion of the jig on which the roughening treatment is performed.
  • the utilization efficiency of the light emitted from the blue light emitting element is enhanced.
  • Appendix 13 The light source device according to appendix 11, wherein a reflective paint is applied to an inner surface of the fixed leg portion.
  • the light emitted from the blue light emitting element toward the side surface of the jig is reflected by the reflective paint applied to the inner surface of the fixed leg portion of the jig.
  • the utilization efficiency of the light emitted from the blue light emitting element is enhanced.
  • Appendix 14 11. The light source device according to appendix 10, wherein an outer surface of the support portion is formed to reflect or scatter light emitted from the blue light emitting element.
  • Appendix 15 The light source device according to appendix 14, wherein a roughening process for roughening a surface is performed on an outer surface of the support portion.
  • the light emitted from the blue light emitting element toward the side surface of the jig is reflected on the surface of the fixing leg portion of the jig on which the roughening treatment is performed.
  • the utilization efficiency of the light emitted from the blue light emitting element is enhanced.
  • Appendix 16 15. The light source device according to appendix 14, wherein a reflective paint is applied to an outer surface of the support portion.
  • the light emitted from the blue light emitting element toward the side surface of the jig is reflected by the reflective paint applied to the outer surface of the support portion constituting the jig.
  • the utilization efficiency of the light emitted from the blue light emitting element is enhanced.
  • the quantum dot-containing body does not leak from the side surface of the jig as compared with the configuration in which no scattering agent is contained in the jig. More components are incident on the screen. Thereby, the utilization efficiency of the light emitted from the blue light emitting element is further enhanced.
  • Appendix 18 The light source device according to appendix 10, wherein a part of the surface of the support part is processed into a shape that reflects or scatters light emitted from the blue light emitting element.
  • the light emitted from the blue light emitting element toward the side surface of the jig is reflected on the surface of a part of the support portion constituting the jig.
  • the utilization efficiency of the light emitted from the blue light emitting element is enhanced.
  • Appendix 20 The light source device according to appendix 10, wherein the mounting portion is made of a transparent resin.
  • a light emitting device package including a blue light emitting device emitting blue light; A quantum dot-containing body containing a quantum dot that converts the wavelength of light emitted from the blue light-emitting element so that the color of light emitted to the outside is white; A jig for fixing the quantum dot-containing body above the light emitting device package; The jig is Located on the light emitting device package, a placement part on which the quantum dot-containing body is placed, and It is located around the light emitting device package, and includes a support part that supports the mounting part.
  • a light source device having a configuration in which a blue light emitting element and a quantum dot are combined can be realized at low cost.
  • the mounting portion constituting the jig is formed in a planar shape so as to cover the entire upper part of the light emitting device package, liquid quantum dots are injected into the jig when the light source device is manufactured. It is possible to adopt a technique of baking them.
  • Appendix 23 The light source device according to any one of appendices 1, 10, and 21, wherein the quantum dot-containing body is a glass in which the quantum dots are enclosed.
  • Appendix 26 A backlight device comprising the light source device according to any one of appendices 1 to 25.
  • the light propagating in the backlight device becomes white light, and even if the light is repeatedly reflected inside the device, yellowish light is not emitted. Therefore, the occurrence of uneven color due to repeated light reflection is prevented.
  • Appendix 27 A backlight device comprising a plurality of light source devices according to any one of appendices 1 to 25.
  • the light propagating in the backlight device becomes white light, and even if the light is repeatedly reflected inside the device, yellowish light is not emitted. Therefore, the occurrence of uneven color due to repeated light reflection is prevented.
  • Appendix 28 28.
  • a display panel including a display unit for displaying an image;
  • the backlight device according to any one of supplementary notes 26 to 28, which is disposed so as to irradiate light on a back surface of the display panel;
  • a display device comprising: a light source control unit that controls light emission intensity of the blue light emitting element.
  • a display device that employs a light source device having a configuration in which a blue light emitting element and a quantum dot are combined, occurrence of color unevenness is suppressed.
  • a display panel including a display unit for displaying an image;
  • a light source control unit for controlling the light emission intensity of the blue light emitting element,
  • the display unit is logically divided into a plurality of areas, Each light source device is provided to correspond to any of the plurality of areas,
  • the light emission intensity of the light source device can be controlled independently, so that power consumption can be reduced.
  • a display device that includes the direct-type backlight device and has the same effects as the configuration described in Appendix 30 is realized.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

L'invention vise à réaliser, à bas coût, un dispositif de source de lumière ayant une constitution dans laquelle des DEL bleues et des points quantiques sont combinés. Elle concerne un dispositif de source de lumière (63), comprenant : un groupe de DEL (631P) contenant des DEL bleues (631) pour l'émission de lumière bleue ; et une feuille de points quantiques (637) contenant des points quantiques (632) pour la conversion de la longueur d'onde de la lumière émise par les DEL bleues (631) de sorte que la lumière émise vers l'extérieur devienne blanche. La feuille de points quantiques (637) est disposée immédiatement en dessous du groupe de DEL (631P).
PCT/JP2017/026039 2016-08-24 2017-07-19 Dispositif de source de lumière et dispositif de rétroéclairage le comportant, et dispositif d'affichage WO2018037775A1 (fr)

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JP2016-163209 2016-08-24
JP2016163209 2016-08-24
JP2017084249 2017-04-21
JP2017-084249 2017-04-21

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CN110837191A (zh) * 2018-08-16 2020-02-25 深圳Tcl新技术有限公司 一种液晶显示背光模组
CN111722434A (zh) * 2019-03-22 2020-09-29 中强光电股份有限公司 光源模块与显示装置
CN114573857A (zh) * 2022-03-11 2022-06-03 纳晶科技股份有限公司 量子点层状体及其制备方法

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JP2008231218A (ja) * 2007-03-20 2008-10-02 Nippon Electric Glass Co Ltd 蛍光体材料及び白色ｌｅｄ
JP2013232426A (ja) * 2007-06-18 2013-11-14 Xicato Inc 固体素子照明装置
JP2010129359A (ja) * 2008-11-27 2010-06-10 Sharp Corp バックライトユニット、及び、液晶表示装置。
JP2015516691A (ja) * 2012-05-14 2015-06-11 コーニンクレッカ フィリップス エヌ ヴェ ナノ構造蛍光体を有する発光装置
JP2015005633A (ja) * 2013-06-21 2015-01-08 シチズンホールディングス株式会社 発光デバイス
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WO2016103720A1 (fr) * 2014-12-24 2016-06-30 株式会社クラレ Dispositif électronique et son procédé de fabrication
JP2016143670A (ja) * 2015-02-05 2016-08-08 三星ディスプレイ株式會社Ｓａｍｓｕｎｇ Ｄｉｓｐｌａｙ Ｃｏ．，Ｌｔｄ． 曲面型バックライトユニット及びこれを含む表示装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110837191A (zh) * 2018-08-16 2020-02-25 深圳Tcl新技术有限公司 一种液晶显示背光模组
CN111722434A (zh) * 2019-03-22 2020-09-29 中强光电股份有限公司 光源模块与显示装置
CN114573857A (zh) * 2022-03-11 2022-06-03 纳晶科技股份有限公司 量子点层状体及其制备方法

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