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WO2013039141A1 - Substrat de conversion de couleur, appareil d'affichage d'image et procédé de fabrication de substrat de conversion de couleur - Google Patents

Substrat de conversion de couleur, appareil d'affichage d'image et procédé de fabrication de substrat de conversion de couleur Download PDF

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Publication number
WO2013039141A1
WO2013039141A1 PCT/JP2012/073446 JP2012073446W WO2013039141A1 WO 2013039141 A1 WO2013039141 A1 WO 2013039141A1 JP 2012073446 W JP2012073446 W JP 2012073446W WO 2013039141 A1 WO2013039141 A1 WO 2013039141A1
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WIPO (PCT)
Prior art keywords
fluorescent
light
color conversion
filter
region
Prior art date
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Ceased
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PCT/JP2012/073446
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English (en)
Japanese (ja)
Inventor
真也 門脇
山渕　浩二
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Sharp Corp
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Sharp Corp
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/201—Filters in the form of arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]

Definitions

  • the present invention relates to a color conversion substrate, an image display device, and a method for manufacturing a color conversion substrate.
  • the conventional image display device includes, for example, a backlight, an optical shutter, and a color filter.
  • the backlight includes a light source such as an LED (Light Emitting Diode) or a cold cathode tube.
  • a liquid crystal panel is used as the optical shutter.
  • the liquid crystal panel includes a TFT substrate, a polarizing plate provided on the back surface of the TFT (Thin Film Transistor) substrate, a counter substrate disposed at a distance from the TFT substrate, and a polarizing plate disposed on the top surface of the counter substrate. And a liquid crystal layer disposed between the TFT substrate and the counter substrate. For example, red, blue and green filter portions are formed in the color filter.
  • the light from the backlight is selectively incident on the filter portion of the color filter by the optical shutter.
  • an image is formed by emitting colored light from the selected filter portion.
  • the filter unit As for the light incident on the filter unit, only light in a predetermined wavelength region passes through the filter unit, and light in other wavelength regions is absorbed by the filter unit. As a result, in the conventional image display apparatus, the light utilization efficiency is extremely low.
  • a color display device described in Japanese Patent Application Laid-Open No. 2000-131683 includes a lighting device, a liquid crystal display element disposed on the lighting device, and a wavelength disposed on the liquid crystal display element.
  • the wavelength conversion unit includes a red phosphor, a green phosphor, a blue color filter, and a black matrix.
  • a black matrix is arranged between each phosphor and between the blue filter and the phosphor.
  • a color LCD (Liquid Crystal Display) described in Japanese Patent Application Laid-Open No. 2003-5182 includes a blue backlight, a liquid crystal display element disposed on the blue backlight, and a liquid crystal display element on the liquid crystal display element. And a disposed phosphor layer.
  • the color conversion substrate described in JP 2009-230889 A includes a transparent substrate, a black matrix formed on the transparent substrate, a red color filter layer formed on the transparent substrate, and a green color.
  • a liquid crystal display device described in Japanese Patent Application Laid-Open No. 2007-79565 includes a backlight, a back substrate provided on the backlight, a liquid crystal layer disposed on the back substrate, and a liquid crystal layer.
  • a front substrate is disposed, a phosphor layer disposed on the front substrate, and a color filter disposed on the phosphor layer.
  • the phosphor layer includes a red phosphor that is excited by blue light from the backlight and emits red light, and a green phosphor that is excited by blue light from the backlight and emits green light.
  • the color filter includes a red filter disposed on the red phosphor and a green filter disposed on the green phosphor.
  • a liquid crystal display device described in Japanese Patent Laying-Open No. 2010-66437 includes a blue light source, an optical shutter disposed on the blue light source, and a light extraction structure disposed on the optical shutter. .
  • the light extraction structure is formed on the substrate, the red phosphor layer formed on the substrate, the green phosphor layer, the light diffusion layer, the peripheral surface of each phosphor layer, and the peripheral surface of the light diffusion layer. And a reflective film.
  • the red phosphor layer, the green phosphor layer, and the light diffusion layer are all formed by photolithography, and all are formed in a truncated cone shape.
  • An organic EL (Electro Luminescence) element described in JP-A-11-329726 includes an EL light-emitting element part, a fluorescent layer that absorbs light from the EL light-emitting element part, and emits fluorescence. including. This phosphor is also formed by photolithography.
  • each phosphor is formed by photolithography.
  • the phosphor formed by the photolithograph has a flat upper surface.
  • the observer observes simultaneously the light that has passed through the phosphor and the light emitted when the phosphor is excited from one pixel, and color mixing occurs.
  • the intensity of the light that has passed through the phosphor is high, and if the observer observes the light that has passed through the phosphor, it may irritate the eyes of the observer. There is.
  • each phosphor is formed by photolithography.
  • an ultraviolet curable resin solution is formed on the entire upper surface of the substrate. Thereafter, the resin solution is irradiated with ultraviolet rays through a photomask having a striped pattern to cure the resin. Thereafter, unexposed portions (uncured portions) are removed by development.
  • the phosphor When the photomask is misaligned, the phosphor is not formed at a predetermined position, and the phosphor is formed on the black matrix of the color filter or on the member formed around the phosphor. May form.
  • the phosphor is formed by photolithography, it is necessary to make the phosphor small in order to avoid the above-described adverse effects. As described above, when a phosphor is formed by photolithography, a number of problems arise.
  • the present invention has been made in view of the problems as described above, and the first object thereof is to prevent the incident light from being visually recognized by the observer even when the incident light passes through the phosphor.
  • Another object of the present invention is to provide a color conversion substrate and an image display device.
  • the second object of the present invention is to provide a method for manufacturing a color conversion substrate that can form a phosphor without using a photolithograph.
  • the color conversion substrate according to the present invention includes a substrate having a main surface and a fluorescent part that is formed on the main surface and absorbs incident light in an incident wavelength region and emits light.
  • a fluorescent part that is formed on the main surface and absorbs incident light in an incident wavelength region and emits light.
  • the surface of the fluorescent part at least the surface of the part where incident light is incident is formed in a curved surface.
  • the main surface includes a first region having a high liquid wettability and a second region having a low liquid wettability formed around the first region.
  • the fluorescent part is formed on the first region.
  • the substrate includes a main plate and a color filter formed on the main plate.
  • the color filter includes a filter portion that transmits light in a transmission wavelength region and a light shielding portion that is formed so as to surround the periphery of the filter portion and prevents light from being transmitted.
  • the first region is formed by a filter portion
  • the second region is formed by a light shielding portion.
  • a reflection part formed on the fluorescent part so as to expose a part of the surface of the fluorescent part so that the incident light enters the fluorescent part, and further reflecting a light from the fluorescent part toward the substrate Prepare.
  • the fluorescent part includes a flat surface located on the substrate and a main surface connected to the peripheral part of the flat surface.
  • the main surface of the fluorescent part is formed in a curved surface shape so that the fluorescent part becomes thicker from the peripheral part of the flat surface toward the central part of the flat surface.
  • the reflection part is formed on the main surface of the fluorescent part so as to extend along the peripheral part of the flat surface. The height of the reflection part is higher than the height of the color filter.
  • the substrate includes a low refractive index layer that is disposed between the main plate and the filter portion and has a refractive index smaller than that of the filter portion.
  • the substrate includes a main plate, a color filter formed on the main plate, and a low refractive index layer formed on the color filter and having a refractive index lower than that of the fluorescent portion.
  • the color filter includes a light-blocking portion that prevents light transmission and a filter portion that transmits light in the transmission wavelength range.
  • the wettability of the filter part is higher than the wettability of the light shielding part.
  • the low refractive index layer is formed on the filter portion.
  • the first region is formed by a low refractive index layer.
  • the second region is formed by a light shielding part.
  • the fluorescent part is formed on the low refractive index layer.
  • a reflection part formed on the fluorescent part so as to expose a part of the surface of the fluorescent part so that the incident light enters the fluorescent part, and further reflecting a light from the fluorescent part toward the substrate Prepare.
  • the fluorescent portion includes a flat surface located on the substrate and a main surface connected to a peripheral portion of the flat surface.
  • the main surface of the fluorescent portion is formed in a curved surface shape so that the thickness of the fluorescent portion increases from the peripheral portion of the flat surface toward the central portion of the flat surface.
  • the reflection part is formed on the main surface of the fluorescent part so as to extend along the peripheral part of the flat surface. The height of the reflection part is higher than the thickness of the color filter.
  • the fluorescent part emits light in a light emission wavelength region when incident light is incident thereon.
  • the fluorescent part is formed of a material that transmits light in the emission wavelength region.
  • An image display device includes the color conversion substrate.
  • the method for manufacturing a color conversion substrate according to the present invention includes a step of forming a substrate in which a first region having a high wettability of a fluorescent solution and a second region having a low wettability of the fluorescent solution are formed on a main surface; A step of applying a fluorescent solution on one region, and a step of forming a fluorescent portion by curing the fluorescent solution applied on the first region.
  • the step of forming the substrate includes a step of preparing a main plate, a step of forming a frame-shaped light blocking portion that prevents light transmission on the main plate, and a portion of the upper surface of the main plate surrounded by the light blocking portion. Forming a filter part that transmits light in the transmission wavelength range. A first region is formed by the filter unit, and a second region is formed by the light shielding unit.
  • the step of forming the substrate includes a step of preparing a main plate, a step of forming a frame-shaped light blocking portion that prevents light transmission on the main plate, and a portion surrounded by the light blocking portion of the upper surface of the main plate And a step of forming a filter part that transmits light in the transmission wavelength region and has higher wettability than the wettability of the light shielding part.
  • the method further includes a step of applying a low refractive index liquid on the filter portion and a step of curing the low refractive index liquid to form a low refractive index film. A first region is formed by the low refractive index film, and a second region is formed by the light shielding portion.
  • the step of forming the light shielding portion includes a step of forming a light shielding film on the main plate, a step of patterning the light shielding film to form a frame-shaped frame portion, and a step of performing plasma treatment on the frame portion. Including.
  • the light shielding part is formed from a material having water repellency.
  • the method further includes a step of forming a light-transmitting protective film on the fluorescent portion, a step of forming a metal film on the protective film, and a step of patterning the metal film. By patterning the metal film, a reflection part in which a hole part for incident light is formed is formed.
  • a phosphor can be formed without using a photolithography.
  • FIG. 1 is a cross-sectional view showing an image display device 1 according to a first embodiment. It is a top view which shows a fluorescence part etc.
  • FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 5 is a cross-sectional view showing a first step of a manufacturing process of the color conversion substrate 4.
  • FIG. It is sectional drawing which shows the process after the manufacturing process shown in FIG. It is sectional drawing which shows the process after the manufacturing process shown in FIG. It is sectional drawing which shows the process after the manufacturing process shown in FIG. It is sectional drawing which shows the structure located in the periphery of the red fluorescent liquid 44R and the red filter part 28R. It is sectional drawing which shows the process after the manufacturing process shown in FIG.
  • FIG. It is sectional drawing which shows the process after the manufacturing process shown in FIG. It is sectional drawing which shows the process after the manufacturing process shown in FIG. It is sectional drawing which shows the image display apparatus 1 which concerns on this Embodiment 2.
  • FIG. It is sectional drawing which shows the fluorescence part 30R, the low refractive index layer 51, and the member located in the circumference
  • FIG. 17 is a cross-sectional view showing a step after the manufacturing step shown in FIG. 16. It is sectional drawing which shows the process after the manufacturing process shown in FIG.
  • FIG. 20 is a cross-sectional view showing a step after the manufacturing step shown in FIG. 19. It is sectional drawing which shows the modification of the color conversion board
  • FIG. It is a top view which shows typically the board
  • a color conversion substrate according to the present invention an image display device including the color conversion substrate, and a method for manufacturing the color conversion substrate will be described with reference to FIGS.
  • combining the structure shown in the following Embodiment 1 and the structure shown in Embodiment 2 as appropriate is planned from the beginning of the application.
  • FIG. 1 is a cross-sectional view showing an image display device 1 according to the first embodiment.
  • the image display device 1 includes a backlight 2, an optical shutter 3 disposed on the backlight 2, and a color conversion substrate 4 disposed on the optical shutter 3.
  • the backlight 2 includes an optical unit 5 and an LED 6 as a light source that emits blue light BL toward the side surface of the optical unit 5.
  • the optical unit 5 includes a plate-shaped light guide plate, a prism sheet provided on the light guide plate, and a diffusion plate.
  • the LED 6 emits blue light BL toward the optical unit 5. Then, the blue light BL emitted from the LED 6 spreads into the light guide plate and then enters the prism sheet or the diffusion plate. Thereafter, the light is emitted from the diffusion plate toward the optical shutter 3.
  • the blue light BL emitted from the backlight 2 toward the optical shutter 3 is substantially parallel light and has high directivity.
  • the wavelength region of this blue light BL is, for example, not less than 390 nm and not more than 510 nm.
  • the wavelength when the intensity of the blue light BL is highest is, for example, about 450 nm.
  • the optical shutter 3 includes a TFT substrate 7 disposed on the backlight 2, a counter substrate 8 disposed at a distance from the TFT substrate 7, and a liquid crystal layer sealed between the TFT substrate 7 and the counter substrate 8.
  • the TFT substrate 7 is formed on the glass substrate 10, the polarizing plate 11 formed on the back surface of the glass substrate 10 facing the backlight 2, the insulating layer 12 formed on the upper surface of the glass substrate 10, and the insulating layer 12.
  • the plurality of pixel electrodes 13 are provided. Further, the TFT substrate 7 includes a plurality of TFT transistors formed on the upper surface of the glass substrate 10. In FIG. 1, the TFT transistor is not shown.
  • the TFT transistor is provided for each pixel electrode 13, and when the TFT transistor is turned on or off, a predetermined potential is applied to the pixel electrode 13 connected to the TFT transistor.
  • the counter substrate 8 includes a glass substrate 14, a counter electrode 15 formed on the lower surface of the glass substrate 14, and a polarizing plate 16 formed on the upper surface of the glass substrate 14. A predetermined potential is applied to the counter electrode 15.
  • the liquid crystal layer 9 includes a plurality of liquid crystal molecules.
  • the optical shutter 3 when a voltage is applied to the pixel electrode 13, the arrangement of liquid crystal molecules located between the pixel electrode 13 and the counter electrode 15 is switched. As a result, the blue light BL is emitted from the polarizing plate 16 toward the color conversion substrate 4.
  • the color conversion substrate 4 includes a substrate 20 including a main surface 18 and a main surface 19, a fluorescent layer 21 formed on the main surface 19, a protective film 23 formed so as to cover the fluorescent layer 21, and a reflective film 24. including.
  • the substrate 20 includes a glass substrate 25 that functions as a main plate and a color filter 26 formed on the main surface of the glass substrate 25.
  • the color filter 26 includes a red filter portion 28R, a green filter portion 28G, a blue filter portion 28B, and a black matrix 27 formed so as to surround each filter portion.
  • the black matrix 27 functions as a light shielding part.
  • the wettability of the red filter part 28R, the green filter part 28G and the blue filter part 28B with respect to the fluorescent liquid is higher than the wettability of the black matrix 27 with respect to the fluorescent liquid.
  • the main surface 19 of the substrate 20 is formed with a region having high wettability with respect to the fluorescent solution and a region with low wettability with respect to the fluorescent solution, and the region having high wettability includes the red filter portion 28R, The green filter portion 28G and the blue filter portion 28B are formed.
  • the region having low wettability is formed by the black matrix 27.
  • the fluorescent layer 21 includes a fluorescent part 30R formed on the surface of the red filter part 28R, a fluorescent part 30G formed on the surface of the green filter part 28G, and a diffusion part 31 formed on the surface of the blue filter part 28B. Including.
  • FIG. 2 is a plan view showing the fluorescent part and the like.
  • the fluorescent part 30R, the fluorescent part 30G, and the diffusing part 31 are viewed from the direction perpendicular to the substrate 20, the fluorescent part 30R,
  • the fluorescent part 30G and the diffusing part 31 are formed to have a substantially rectangular shape.
  • the length L of the fluorescent part 30R, the fluorescent part 30G, and the diffusing part 31 is not less than 30 ⁇ m and not more than 2400 ⁇ m
  • the width W of the fluorescent part 30R, the fluorescent part 30G, and the diffusing part 31 is not less than 30 ⁇ m and not more than 800 ⁇ m.
  • FIG. 3 is a cross-sectional view taken along line III-III shown in FIG.
  • the fluorescent portion 30 ⁇ / b> R includes a flat surface 35 located on the main surface 19 of the substrate 20 and a main surface 36 connected to the outer peripheral edge of the flat surface 35.
  • the main surface 36 is formed in a convex curved surface shape.
  • the center point of the flat surface 35 is the center point O.
  • the main surface 36 is formed so that the thickness of the fluorescent portion 30 ⁇ / b> R increases from the outer peripheral edge of the flat surface 35 toward the center point O.
  • the thickness of the fluorescent portion 30R is the thickest at the portion where the center point O is located.
  • the thickness of the fluorescent portion 30R where the center point O is located is, for example, 3 ⁇ m or more and 20 ⁇ m or less.
  • the thickness of the fluorescent part 30R becomes thinner than 3 ⁇ m, the amount of blue light BL that passes through the fluorescent part 30R without being absorbed by the fluorescent part 30R becomes excessive.
  • the thickness of the fluorescent part 30R is thicker than 20 ⁇ m, the size of the color conversion substrate 4 becomes excessive.
  • the thickness of the portion where the center point O is located is about 5 ⁇ m to about 10 ⁇ m.
  • the outer peripheral edge 38 of the fluorescent part 30R is located on the boundary between the black matrix 27 and the red filter part 28R.
  • the contact angle ⁇ between the fluorescent portion 30R and the main surface 19 at the outer peripheral edge 38 is set to 20 ° to 70 °.
  • the fluorescent part 30G and the diffusing part 31 are also formed to have the same shape as the fluorescent part 30R.
  • the fluorescent portion 30R emits red light when the blue light BL is incident.
  • the peak wavelength at which the intensity of red light is highest is located at 610 nm and in the vicinity thereof.
  • the wavelength range of red light is, for example, about 530 nm to 690 nm.
  • the fluorescent portion 30G emits green light when blue light BL is incident.
  • the peak wavelength at which the intensity of green light is highest is located at 520 nm and in the vicinity thereof.
  • the wavelength region of green light is, for example, about 460 nm or more and 580 nm or less.
  • Light from the fluorescent portions 30R and 30G is emitted radially.
  • the fluorescent portions 30R and 30G are formed of an organic fluorescent material or a nano fluorescent material.
  • organic fluorescent materials include rhodamine dyes such as rhodamine B as red fluorescent dyes, and coumarin dyes such as coumarin 6 as green fluorescent dyes.
  • the nano fluorescent material includes a binder and a plurality of phosphors diffused in the binder.
  • the binder is made of, for example, a transparent silicone-based, epoxy-based, or acrylic resin.
  • the phosphor for example, a nanoparticle phosphor such as CdSe or ZnS can be used.
  • the fluorescent part 30R can transmit red light (light having a wavelength range of 530 nm to 690 nm). Thereby, the light emitted when the fluorescent part 30R is excited can pass through the fluorescent part 30R itself, and the utilization efficiency of the light from the fluorescent part 30R can be improved.
  • the fluorescent part 30G can transmit green light (light having a wavelength range of 460 nm or more and 580 nm), and the utilization efficiency of light generated by the emission of the fluorescent part 30G can be improved.
  • the diffusing unit 31 includes a binder and a filler diffused in the binder, and the diffusing unit 31 only needs to transmit or scatter blue light.
  • a filler having a refractive index lower than that of the binder, a filler having a refractive index higher than that of the binder, and a filler with Mie scattering such as TiO 2 can be adopted.
  • the fluorescent parts 30R and 30G emit light, light is emitted radially from the fluorescent part 30R. For this reason, it is preferable to employ a material having Lambertian characteristics as a material for forming the diffusion portion 31.
  • the protective film 23 is formed so as to cover the fluorescent part 30 ⁇ / b> R, the fluorescent part 30 ⁇ / b> G, and the diffusion part 31.
  • the protective film 23 is made of a transparent material, and the protective film 23 is made of, for example, a silicon oxide film (SiO 2 ) or a silicon nitride film (Si x N y ).
  • the reflective film 24 is formed so as to cover the protective film 23. As shown in FIGS. 1 and 2, the reflective film 24 has an opening 32, an opening 33, and an opening 34.
  • the reflective film 24 includes a reflective portion 37 that extends along the outer peripheral edge of the flat surface 35 of the fluorescent portion 30R and is formed on the main surface 36 of the fluorescent portion 30R. As shown in FIG. 2, the reflective film 24 is formed in an annular shape.
  • the opening portion 32 is formed by the reflection portion 37.
  • the blue light BL enters the fluorescent portion 30R from the opening 32. At least a part of the blue light BL entering the fluorescent part 30R is absorbed by the fluorescent part 30R. As shown in FIG. 3, the fluorescent part 30R is excited when absorbing the blue light BL, and emits the red light RL radially.
  • the red light RL emitted toward the substrate 20 is emitted toward the outside through the substrate 20.
  • the red light RL emitted toward the side is reflected by the reflecting portion 37 toward the substrate 20.
  • the light utilization efficiency is improved by providing the reflection portion 37.
  • the blue light BL that passes through the fluorescent part 30R is referred to as blue light BL1 and BL2.
  • the blue lights BL1 and BL2 are bent at the main surface 36 of the fluorescent portion 30R.
  • the blue light BL ⁇ b> 1 and the blue light BL ⁇ b> 2 are collected at a position close to the substrate 20.
  • blue light BL1, BL2 advances so that it may mutually spread as it leaves
  • the reflection portion 37 is formed so as to extend from the outer peripheral edge portion of the flat surface 35 onto the main surface 36 and toward the apex portion of the fluorescent portion 30R.
  • An opening edge portion of the opening portion 32 is formed by the end portion of the reflection portion 37, and the height H of the end portion of the reflection portion 37 is larger than the thickness T ⁇ b> 1 of the color filter 26.
  • the red filter portion 28R transmits light in the wavelength range of red light (light having a wavelength range of 530 nm or more and 690 nm or less), and absorbs light in a wavelength range other than the wavelength range of red light.
  • the red filter portion 28R absorbs blue light BL has higher absorption efficiency than the fluorescent portion 30R absorbs blue light BL, and the red filter portion 28R improves the blue light BL that has passed through the fluorescent portion 30R. Absorb.
  • the red filter portion 28R absorbs the blue light well when blue light is incident from the outside. Therefore, even if the blue light is incident from the outside toward the fluorescent portion 30R, the red light portion 28R is affected by the blue light. Excitation of 30R can be suppressed.
  • the green filter unit 28G shown in FIG. 1 transmits light in the wavelength region of green light (light having a wavelength region of 460 nm or more and 580 nm), but absorbs light in a wavelength region other than the wavelength region of green light. . For this reason, it can suppress that the fluorescence part 30G is excited by the light from the outside, and can suppress that the blue light BL that has passed through the fluorescence part 30G is emitted to the outside.
  • the opening 32 when the fluorescent part 30R and the fluorescent part 30R are viewed from the direction perpendicular to the substrate 20, the opening 32 has the blue light BL at the central point O and the part located around the central part O of the fluorescent part 30R. It arrange
  • the blue light BL passes through a thick portion of the fluorescent portion 30R, the blue light BL is easily absorbed by the fluorescent portion 30R, and the blue light BL is prevented from passing through the fluorescent portion 30R. it can.
  • the blue light BL passes through the opening 33 and enters the fluorescent part 30G.
  • the part into which the blue light BL enters is formed in a convex curved surface shape. For this reason, even if a part of the blue light BL that has entered the fluorescent part 30G passes through the fluorescent part 30G, it is emitted from the substrate 20 so as to diffuse away from the substrate 20.
  • the blue light BL passes through the fluorescent part 30G, it is possible to suppress an observer from visually recognizing the blue light BL.
  • the distance between the end of the reflective film 24 that forms the opening 33 and the main surface 19 is greater than the thickness of the color filter 26. For this reason, the passage of the blue light BL is also suppressed in the fluorescent part 30G. Further, the light emitted from the fluorescent part 30 ⁇ / b> G emitted to the side is reflected toward the substrate 20 by the reflective film 24. Thus, the utilization efficiency of the light emitted from the fluorescent part 30G is improved.
  • the blue light BL enters the diffusion part 31 through the opening 34.
  • the light that has entered the diffusing unit 31 is diffused by the filler in the diffusing unit 31 and then emitted from the substrate 20 to the outside.
  • the blue light BL diffused laterally in the diffusing unit 31 is reflected toward the glass substrate 25 by the reflective film 24. For this reason, the utilization efficiency of the blue light BL incident on the diffusion portion 31 is improved.
  • FIG. 4 is a cross-sectional view showing a first step of the manufacturing process of the color conversion substrate 4. As shown in FIG. 4, a glass substrate 25 having a main surface is prepared.
  • a carbon black-containing photosensitive resin or the like is formed on the main surface of the glass substrate 25 by a spin coating method or the like.
  • the resin layer is subjected to heat treatment. Then, using the mask, the resin layer is subjected to an exposure process, and then developed. And the baking process is performed to the resin layer to which the development process was performed.
  • the surface of the resin layer is modified by a plasma method using a fluorine-based gas such as CF 4 on the baked resin layer. Thereby, the black matrix 27 having water repellency can be formed.
  • the black matrix 27 having water repellency As a method for forming the black matrix 27 having water repellency, the following method can also be employed. For example, a photosensitive resin to which a water repellent is added, a photosensitive resin containing fluorine or the like in the main chain, or a photosensitive resin containing fluorine or the like in the side chain is formed on the main surface of the glass substrate 25. Thereafter, the resin layer is subjected to photolithography to form a black matrix 27. In this way, the black matrix 27 with low wettability can be formed.
  • a fluorine compound, a silicon compound, etc. are employable, for example.
  • the fluorine compound for example, an oligomer or polymer having a fluoroalkyl group can be employed.
  • the black matrix 27 is, for example, about 1 ⁇ m to 5 ⁇ m. This is because if the black matrix 27 is formed thinner than 1 ⁇ m, the light blocking function of the black matrix 27 is remarkably lowered, and if it is thicker than 5 ⁇ m, the color filter is finally thickened.
  • the black matrix 27 is formed in a frame shape, and a plurality of holes 39 are formed in the black matrix 27.
  • FIG. 5 is a cross-sectional view showing a step after the manufacturing step shown in FIG. As shown in FIG. 5, the hole 39 is filled with a filter material in each hole 39 by an ink jet method.
  • the blue filter material 40B, the green filter material 40G, and the red filter material 40R are discharged toward the respective holes 39 from the nozzles 41, 42, and 43 of the inkjet device.
  • the filter material is prevented from running on the upper surface of the black matrix 27.
  • FIG. 6 is a cross-sectional view showing a step after the manufacturing step shown in FIG.
  • the blue filter material 40B, the green filter material 40G, and the red filter material 40R are baked to form the blue filter portion 28B, the green filter portion 28G, and the red filter portion 28R.
  • the upper surfaces of the blue filter portions 28B, the green filter portions 28G, and the red filter portions 28R are flat. In this way, the color filter 26 is formed.
  • FIG. 7 is a cross-sectional view showing a step after the manufacturing step shown in FIG.
  • a diffusion material 45 is applied on the blue filter portion 28B by an inkjet method.
  • a green fluorescent solution 44G is applied on the green filter portion 28G, and a red fluorescent solution 44R is applied on the red filter portion 28R.
  • the diffusing material 45, the green fluorescent solution 44G, and the red fluorescent solution 44R are discharged from nozzles 46, 47, and 48, respectively.
  • the wettability of the black matrix 27 with respect to the diffusing material 45 and the fluorescent liquid is lower than the wettability of each filter part with respect to the diffusing material 45 and the fluorescent liquid.
  • FIG. 8 is a cross-sectional view showing the red fluorescent solution 44R and the red filter portion 28R and the configuration located in the periphery thereof.
  • the wettability of the upper surface of the red filter portion 28R with respect to the red fluorescent solution 44R is greater than the wettability of the upper surface of the black matrix 27 with respect to the red fluorescent solution 44R.
  • the contact angle ⁇ 1 is in a predetermined range, and the red fluorescent solution 44R is prevented from spreading on the upper surface of the black matrix 27.
  • the wettability of the blue filter portion 28 ⁇ / b> B with respect to the diffusion material 45 is higher than the wettability of the black matrix 27 with respect to the diffusion material 45, so that the diffusion material 45 is prevented from spreading on the upper surface of the black matrix 27. can do.
  • the green fluorescent solution 44G Since the wettability of the green filter part 28G to the green fluorescent solution 44G is higher than the wettability of the black matrix 27 to the green fluorescent solution 44G, the green fluorescent solution 44G is prevented from spreading on the upper surface of the black matrix 27.
  • the red fluorescent solution 44R, the green fluorescent solution 44G, and the diffusion material 45 can be formed on the red filter portion 28R, the green filter portion 28G, and the blue filter portion 28B by self-alignment. For this reason, compared with the case where the fluorescent part is formed by the photolithographic method, it is possible to suppress the occurrence of adverse effects such as mask displacement.
  • red fluorescent solution 44R and the green fluorescent solution 44G are formed of an organic fluorescent material, a nano fluorescent material, or the like.
  • the fluorescent part is formed by the photolithographic method
  • an organic fluorescent material is employed in the photolithographic method
  • the characteristics of the organic material may be altered when the fluorescent material is exposed to ultraviolet rays.
  • the particle size of the inorganic material employed in the photolithographic method is large, the inorganic material cannot be discharged from the nozzle of the ink jet apparatus.
  • the organic fluorescent material is a fluid
  • the material can be discharged from the nozzle of the ink jet apparatus.
  • the phosphor contained in the nano-fluorescent material has an order of particle size of several hundred nanometers or less, the nano-fluorescent material can also be discharged from the nozzle of the ink jet apparatus.
  • the length L of the blue filter portion 28B, the green filter portion 28G, and the red filter portion 28R is not less than 30 ⁇ m and not more than 2400 ⁇ m, and the width W of the green filter portion 28G and the red filter portion 28R is not less than 30 ⁇ m. 800 ⁇ m or less.
  • the fluorescent liquid or the like becomes a flat surface due to its own weight, whereas in the present embodiment, the fluorescent liquid or the like is applied to a narrow region as described above. Moreover, the surface of the fluorescent solution is curved.
  • FIG. 9 is a cross-sectional view showing a step after the manufacturing step shown in FIG. As shown in FIG. 9, the diffusing material 45, the green fluorescent solution 44G, and the red fluorescent solution 44R are baked to form the diffusing unit 31, the fluorescent unit 30G, and the fluorescent unit 30R.
  • the contact angle ⁇ is, for example, not less than 20 ° and not more than 70 °.
  • FIG. 10 is a cross-sectional view showing a step after the manufacturing step shown in FIG.
  • the protective film 23 is formed so as to cover the black matrix 27, the diffusion part 31, and the fluorescent parts 30G and 30R.
  • the protective film 23 is, for example, a silicon oxide film or a silicon nitride film, and is a transparent film.
  • FIG. 11 is a cross-sectional view showing a step after the manufacturing step shown in FIG. In FIG. 11, a metal film such as aluminum (Al), silver (Ag), or an alloy thereof is formed on the protective film 23 by sputtering.
  • a metal film such as aluminum (Al), silver (Ag), or an alloy thereof is formed on the protective film 23 by sputtering.
  • the metal film is favorably deposited on the fluorescent portion 30R.
  • a metal film can be satisfactorily formed on the fluorescent part 30G and the diffusion part 31.
  • the metal film is etched to form the reflective film 24 in which the opening 34, the opening 33, and the opening 32 are formed.
  • a resist mask is formed on the metal film, and then the metal film is patterned with an etching solution.
  • the main surfaces of the diffusion part 31, the fluorescent part 30G, and the fluorescent part 30R are covered with the protective film 23, the diffusion part 31, the fluorescent part 30G, and the fluorescent part 30R are deteriorated by the etching solution or the resist stripping solution. Can be suppressed. In this way, the color conversion substrate 4 according to the present embodiment can be formed.
  • the fluorescent part 30R, the fluorescent part 30G, and the diffusing part 31 can be formed by the ink jet method, and the fluorescent part 30R by the photolithography method.
  • the number of steps can be reduced as compared with the case where the fluorescent part 30G and the diffusion part 31 are formed.
  • Embodiment 2 The manufacturing method of the image display device 1, the color conversion board 4 and the color conversion board 4 according to the second embodiment will be described with reference to FIGS. Of the configurations shown in FIGS. 12 to 21, the same or corresponding components as those shown in FIGS. 1 to 11 may be assigned the same reference numerals and explanation thereof may be omitted.
  • FIG. 12 is a cross-sectional view showing the image display device 1 according to the second embodiment.
  • the example shown in FIG. 12 also includes a backlight 2, an optical shutter 3, and a color conversion substrate 4 disposed on the optical shutter 3, as in the image display device 1 according to the first embodiment.
  • the color conversion substrate 4 includes a substrate 20, a fluorescent layer 21 formed on the main surface 19 of the substrate 20, a protective film 23 formed so as to cover the fluorescent layer 21, and a reflective film 24 formed on the protective film 23.
  • the glass substrate 25 includes a glass substrate 25, a color filter 26 formed on the main surface of the glass substrate 25, and low refractive index layers 50, 51, 52 formed on the filter portion of the color filter 26.
  • the color filter 26 includes a red filter portion 28R, a green filter portion 28G, a blue filter portion 28B, and a black matrix 27.
  • the low refractive index layer 50 is formed on the surface of the red filter portion 28R, and the low refractive index layer 51 is formed on the surface of the green filter portion 28G.
  • the low refractive index layer 52 is formed in the blue filter portion 28B.
  • the fluorescent layer 21 includes fluorescent portions 30 ⁇ / b> R and 30 ⁇ / b> G formed on the lower surfaces of the low refractive index layers 50 and 51, and a diffusion portion 31 formed on the lower surface of the low refractive index layer 52.
  • FIG. 13 is a cross-sectional view showing the fluorescent portion 30R, the low refractive index layer 50, and members located therearound.
  • the color filter 26 includes a black matrix 27 formed in a frame shape and a red filter portion 28 ⁇ / b> R formed in the hole 39 of the black matrix 27.
  • the low refractive index layer 50 is formed in the hole 39 and is formed on the lower surface of the red filter portion 28R.
  • the low refractive index layer 50 and the black matrix 27 are formed to be flush with each other.
  • the fluorescent portion 30R is formed on the lower surface of the low refractive index layer 50, and the outer peripheral edge of the fluorescent portion 30R is located on the boundary between the edge 29 of the black matrix 27 and the low refractive index layer 50. .
  • the low refractive index layer 50 for example, hollow silica or the like can be employed, and the average particle diameter of the hollow silica is, for example, about 5 nm to 300 nm.
  • the hollow silica has a hollow formed inside the outer shell having pores, and is formed into a hollow sphere.
  • the cavity contains the solvent and / or gas at the time of preparation of the fine particles.
  • the refractive index of the fluorescent part 30R is 1.49 or more and 1.59 or less, and the refractive index of the glass substrate 25 is about 1.52.
  • the refractive index of the low refractive index layer 50 is, for example, about 1.20 or more and 1.40 or less. Note that the refractive index of the red filter portion 28 ⁇ / b> R is larger than that of the low refractive index layer 50.
  • the fluorescent part 30R absorbs the blue light BL and the fluorescent part 30R is excited.
  • the fluorescent part 30R emits red light RL radially.
  • the refractive index of the fluorescent part 30R is larger than the refractive index of the low refractive index layer 50, when the incident angle when the red light RL from the fluorescent part 30R enters the low refractive index layer 50 is larger than the critical angle. The red light RL is totally reflected.
  • the light totally reflected at the interface between the low refractive index layer 50 and the fluorescent part 30 ⁇ / b> R is then reflected by the surface of the reflective part 37.
  • the red light RL reflected by the reflecting portion 37 travels toward the low refractive index layer 50 again.
  • the red light RL since the incident angle of the red light RL to the low refractive index layer 50 is small, the red light RL enters the low refractive index layer 50. Thereafter, the light passes through the red filter portion 28R and enters the glass substrate 25.
  • the red light RL reaches the interface between the glass substrate 25 and the air. While the refractive index of the glass substrate 25 is larger than the refractive index of air, since the incident angle when the red light RL is incident on the interface between the glass substrate 25 and air is small, the critical angle from the glass substrate 25 to air is small. The smaller red light RL is emitted to the outside without being totally reflected at the interface between the glass substrate 25 and air.
  • the red light RL having an incident angle that is incident on the interface between the glass substrate 25 and air is larger than the critical angle. Is totally reflected at the interface between the glass substrate 25 and air. The red light RL totally reflected at the interface between the glass substrate 25 and air is repeatedly reflected in the glass substrate 25 and then emitted from the side surface of the glass substrate 25 to the outside.
  • the red light RL having a radiation angle ⁇ of a predetermined angle or less is emitted to the outside from the main surface 18 of the glass substrate 25, while the radiation angle ⁇ is glass.
  • Red light RL larger than a predetermined angle defined by Snell's law using the refractive index of the substrate 25 and the refractive index of air is not emitted from the main surface 18 of the glass substrate 25.
  • the emission angle ⁇ of the red light RL is defined by Snell's law using the refractive index of the glass substrate 25 and the refractive index of air. Even if the red light RL is larger than the predetermined angle, the red light RL larger than the predetermined angle defined by Snell's law using the refractive index of the fluorescent portion 30R and the refractive index of the low refractive index layer is low. And it can be made to radiate
  • the utilization efficiency of the red light RL emitted from the fluorescent portion 30R can be improved.
  • the fluorescent part 30R has been described with reference to FIG. 13, the same effect can be obtained in the fluorescent part 30G and the diffusing part 31.
  • FIG. 14 is a cross-sectional view showing a first step of the color conversion substrate 4 according to the present embodiment.
  • a frame-like black matrix 27 is formed on the main surface of the glass substrate 25.
  • a blue filter portion 28B, a green filter portion 28G, and a red filter portion 28R are formed in the hole 39 of the black matrix 27 by an ink jet method.
  • the black matrix 27 is subjected to water repellent treatment as in the first embodiment, and the wettability of the black matrix 27 is that of the blue filter portion 28B, the green filter portion 28G, and the red filter portion 28R. Lower than sex.
  • FIG. 15 is a cross-sectional view showing a step after the manufacturing step shown in FIG.
  • a paint containing hollow silica, an acrylic-based transparent resin, a curing agent, and a solvent is applied to the upper surfaces of the blue filter portion 28B, the green filter portion 28G, and the red filter portion 28R by an inkjet device.
  • the wettability of the black matrix 27 with respect to the paint is lower than the wettability of the blue filter part 28B, the green filter part 28G, and the red filter part 28R with respect to the paint, so that the paint is formed on the upper surface of the black matrix 27. Is suppressed.
  • the low refractive index layer 52 is formed on the upper surface of the blue filter portion 28B, and the low refractive index layer 51 is formed on the upper surface of the green filter portion 28G. Further, the low refractive index layer 50 is formed on the upper surface of the red filter portion 28R.
  • the low refractive index layers 50 to 52 can be formed by self-alignment, and the occurrence of adverse effects such as mask displacement is suppressed. be able to.
  • the low refractive index layers 50 to 52 can be formed by the ink jet method, the manufacturing process can be simplified as compared with the case where the low refractive index layer is formed by photolithography.
  • FIG. 16 is a cross-sectional view showing a step after the manufacturing step shown in FIG. As shown in FIG. 16, the diffusion material 45 is applied on the upper surface of the low refractive index layer 52 using an inkjet device, and the green fluorescent solution 44G is formed on the upper surfaces of the low refractive index layer 51 and the low refractive index layer 50. And the red fluorescent solution 44R is applied.
  • FIG. 17 is a cross-sectional view showing the red fluorescent solution 44R, the low refractive index layer 50, the black matrix 27, and members located therearound.
  • the wettability of the low refractive index layer 50 with respect to the red fluorescent solution 44R is higher than the wettability of the black matrix 27 with respect to the red fluorescent solution 44R. For this reason, when the red fluorescent solution 44R is applied on the upper surface of the low refractive index layer 50, the red fluorescent solution 44R can be prevented from spreading on the upper surface of the black matrix 27.
  • the upper surface of the low refractive index layer 50 and the upper surface of the black matrix 27 are formed to be flush with each other. For this reason, compared with the case where the low refractive index layer 50 protrudes upwards from the black matrix 27, the coating amount of the red fluorescent liquid 44R that can be placed on the upper surface of the low refractive index layer 50 can be increased.
  • the wettability of the black matrix 27 with respect to the diffusing material 45 is lower than the wettability of the low refractive index layer 52 with respect to the diffusing material 45, and the wettability of the black matrix 27 with respect to the green fluorescent solution 44G is The wettability of the low refractive index layer 51 is lower.
  • the diffusion material 45 applied on the low refractive index layer 52 is suppressed from spreading on the upper surface of the black matrix 27, and the green fluorescent solution 44 ⁇ / b> G formed on the low refractive index layer 51 spreads on the black matrix 27. This can be suppressed.
  • the diffusion material 45, the green fluorescent solution 44G, and the red fluorescent solution 44R are self-aligned with the low refractive index layer 52, the low refractive index layer 51, and the low refractive index. It can be formed on the rate layer 50.
  • FIG. 18 is a cross-sectional view showing a step after the manufacturing step shown in FIG. As shown in FIG. 18, the diffusion material 45, the green fluorescent solution 44G, and the red fluorescent solution 44R are baked to form the diffusing unit 31, the fluorescent unit 30G, and the fluorescent unit 30R.
  • FIG. 19 is a cross-sectional view showing a step after the manufacturing step shown in FIG. As shown in FIG. 19, the protective film 23 is formed so as to cover the main surfaces of the diffusion part 31, the fluorescent part 30G, and the fluorescent part 30R.
  • FIG. 20 is a cross-sectional view showing a step after the manufacturing step shown in FIG. As shown in FIG. 20, a metal film such as aluminum, silver or an alloy thereof is formed on the upper surface of the protective film 23 by sputtering. Thereafter, the metal film is etched to form the reflective film 24 in which the openings 32, 33, and 34 are formed.
  • a metal film such as aluminum, silver or an alloy thereof is formed on the upper surface of the protective film 23 by sputtering. Thereafter, the metal film is etched to form the reflective film 24 in which the openings 32, 33, and 34 are formed.
  • the protective film 23 since the protective film 23 is formed, the diffusion portion 31, the fluorescent portion 30G, and the fluorescent portion 30R deteriorate when the metal film is patterned. Can be suppressed.
  • FIG. 21 is a cross-sectional view showing a modification of the color conversion board 4 according to the second embodiment.
  • the low refractive index layer 51 is formed between the red filter portion 28 ⁇ / b> R and the glass substrate 25. Also in the color conversion substrate 4 formed in this way, when the blue light BL is incident on the fluorescent part 30R, the radial red light RL is emitted from the fluorescent part 30R.
  • the red light RL having the radiation angle ⁇ larger than the predetermined angle is totally reflected by the low refractive index layer 51.
  • the red light RL totally reflected by the low refractive index layer 51 is reflected by the reflecting portion 37.
  • the red light RL reflected by the reflecting portion 37 enters the low refractive index layer 51.
  • the incident angle is smaller than the critical angle when the red light RL enters the low refractive index layer 51, the red light RL enters the low refractive index layer 51.
  • the red light RL is incident on the main surface 18 of the glass substrate 25.
  • the utilization efficiency of the light emitted from the fluorescent portion 30R can be improved.
  • a direct type backlight having a plurality of LED light sources arranged in an array a backlight having an inorganic EL light source arranged in an array, a backlight having a plurality of organic EL light sources arranged in an array, etc. Can be adopted.
  • Example 1 of the present invention will be described with reference to FIGS. Specifically, the case where the fluorescent part is formed on the substrate on which the water-repellent region and the non-water-repellent region are formed will be described.
  • FIG. 22 is a plan view schematically showing a substrate to which a fluorescent solution is applied.
  • a water repellent region R1, a non-water repellent region R2, and a non-water repellent region R3 are formed on the main surface of the substrate 60.
  • the water repellent region R1 is formed in a frame shape, and the non-water repellent region R2 and the non-water repellent region R3 are surrounded by the water repellent region R1.
  • the substrate 60 is coated with a negative photosensitive resin having water repellency on a glass substrate, and then the photosensitive resin is exposed to ultraviolet rays through a photomask, and unexposed portions are removed by development. It is manufactured by forming the water repellent region R2 and the non-water repellent region R3.
  • Fluorescent liquid is applied to the non-water-repellent region R2 of the substrate 60 thus formed by an ink jet method. Thereafter, the fluorescent solution is baked. After baking, the fluorescent solution is applied again to perform baking. Thus, the application of the fluorescent solution and the baking process are repeated a plurality of times.
  • the contact angle of the fluorescent liquid dropped on the thin film formed by curing the negative photosensitive resin having water repellency is 49.5 degrees.
  • the contact angle when pure water was dropped on the thin film was 95.2 degrees.
  • FIG. 23 shows a cross-sectional view of the fluorescent part 61 formed by repeating the fluorescent solution and the baking process.
  • FIG. 24 is a plan view showing the fluorescent part 61 and the substrate 60 shown in FIG.
  • the contact angle ⁇ is 35 degrees, and the film thickness T2 is 11.7 ⁇ m.
  • the fluorescent part 61 is contained in the non-water-repellent region R2, and the fluorescent part 61 can be suppressed from being formed on the water-repellent region R1.
  • the present invention can be applied to a color conversion substrate, an image display device, and a method for manufacturing a color conversion substrate.

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Abstract

L'invention porte sur un substrat de conversion de couleur (4) qui comporte : un substrat (20) ayant une surface principale (19) ; des sections fluorescentes (30R, 30G), qui sont formées sur la surface principale (19), absorbent une lumière incidente (BL) dans une plage de longueur d'onde incidente, et émettant de la lumière. Dans le substrat de conversion de couleur (4), au moins une partie de surface, où la lumière incidente entre, est formée dans une forme incurvée, ladite partie étant une partie des surfaces des sections fluorescentes (30R, 30G).
PCT/JP2012/073446 2011-09-14 2012-09-13 Substrat de conversion de couleur, appareil d'affichage d'image et procédé de fabrication de substrat de conversion de couleur Ceased WO2013039141A1 (fr)

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KR20190047592A (ko) * 2017-10-25 2019-05-08 삼성디스플레이 주식회사 색변환 소자 및 이를 포함하는 표시 장치
CN109709710A (zh) * 2017-10-25 2019-05-03 三星显示有限公司 颜色转换元件和包括该颜色转换元件的显示设备
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CN109709710B (zh) * 2017-10-25 2024-03-15 三星显示有限公司 颜色转换元件和包括该颜色转换元件的显示设备
KR20230133261A (ko) * 2017-10-25 2023-09-19 삼성디스플레이 주식회사 색변환 소자 및 이를 포함하는 표시 장치
CN112534314A (zh) * 2018-08-28 2021-03-19 松下知识产权经营株式会社 颜色转换元件
CN111092101A (zh) * 2018-10-24 2020-05-01 群创光电股份有限公司 显示装置
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TWI851199B (zh) * 2023-05-11 2024-08-01 友達光電股份有限公司 顯示裝置及其製造方法

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