KR20170076216A - Light guide panel patterned color converting phosphor layer, display device and display panel comprising the same - Google Patents

Light guide panel patterned color converting phosphor layer, display device and display panel comprising the same Download PDF

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KR20170076216A
KR20170076216A KR1020150186215A KR20150186215A KR20170076216A KR 20170076216 A KR20170076216 A KR 20170076216A KR 1020150186215 A KR1020150186215 A KR 1020150186215A KR 20150186215 A KR20150186215 A KR 20150186215A KR 20170076216 A KR20170076216 A KR 20170076216A
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patterned
phosphor layer
layer
light guide
inorganic
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KR1020150186215A
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Korean (ko)
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KR101806870B1 (en
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정운진
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공주대학교 산학협력단
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/102—Glass compositions containing silica with 40% to 90% silica, by weight containing lead
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • 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
    • H01L33/58—Optical field-shaping elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B33/00—Electroluminescent light sources
    • H05B33/12—Light sources with substantially two-dimensional radiating surfaces
    • H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
    • H05B33/145—Arrangements of the electroluminescent material
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
    • G02B2207/113—Fluorescence

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Manufacturing & Machinery (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Mathematical Physics (AREA)
  • Inorganic Chemistry (AREA)
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Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light guide plate having patterned phosphor layers for color conversion and a backlight unit for a display including the same, and more specifically, An inorganic phosphor layer patterned on one surface of the glass substrate to emit red light and green light; And a blue light LED light source provided on one side of the glass substrate, wherein a space is formed in which the inorganic layer not containing the phosphor of the glass substrate is patterned or the inorganic phosphor layer is not patterned, Wherein the color conversion phosphor layer is patterned and the display device including the same.

Description

TECHNICAL FIELD [0001] The present invention relates to a light guide plate patterned with a phosphor layer for color conversion, a display device including the same, and a display panel including the light guide panel patterned coloring phosphor layer,

The present invention relates to a multifunctional light guide plate patterned with a phosphor layer for color conversion, a display device including the same, and a display panel.

LED is a kind of optoelectronic device that emits in the form of light of energy corresponding to the bandgap of semiconductor by the combination of electrons and holes when a voltage is applied. Due to low power consumption, long lifespan and application of eco-friendly materials compared to conventional incandescent lamps, demand for LED light sources has exploded in recent years. Particularly, applications and demands of white light LEDs are greatly increasing in backlight units (BLU) and automobile lighting of indoor and outdoor lighting, displays, and portable electronic devices. The implementation of white light LEDs is generally applied by mixing yellow or green and red phosphors on a blue LED diode with an organic binder. As the organic binder, an epoxy or silicone series is mainly used. This method has been widely used in the manufacture of conventional white light LEDs because it is easy to apply the phosphor on the blue LED chip by mixing the phosphor with the organic binder and has high mass productivity and relatively low production cost.

However, as the application of white light LEDs has recently expanded, high-power white light LEDs for indoor and outdoor lighting and electric fields have been required. Therefore, technologies capable of replacing such white light LEDs have been attracting attention due to inherent limitations of organic binders. When the organic binder is exposed to UV or 150 ° C. for a long time, coloring of the binder to yellow or brown occurs, thereby limiting the practical service life of the LED. In addition, there is a blurring phenomenon in which the color of the LED is different depending on the position of the phosphor due to the viscosity of the organic binder, and when there is no homogeneous mixing, binning phenomenon Resulting in lowering the production efficiency.

Further, in order to scatter and diffuse the light incident from the LED light source, the LED element includes a diffusing plate, which causes a decrease in luminance, a luminance uniformity decreases with a large-area lighting apparatus, and an increase in panel thickness and production cost .

Prior art related to this is a light diffusion plate formed with a double-sided pattern disclosed in Korean Patent Laid-Open Publication No. 2014-0084677 (published on July 21, 2014) and a backlight unit including the same.

Accordingly, it is an object of the present invention to reduce the thickness and process cost of a display device by integrating a light guide plate, a diffusing plate, and a reflective layer used in a conventional multi-layer type backlight unit to replace expensive white light LEDs, And a display panel and a display panel including the multi-function light guide plate.

The problems to be solved by the present invention are not limited to the above-mentioned problem (s), and another problem (s) not mentioned can be understood by those skilled in the art from the following description.

In order to solve the above problems, the present invention provides a glass substrate comprising: a glass substrate; An inorganic phosphor layer patterned on one surface of the glass substrate to emit red light and green light; And a blue light LED light source provided on one side of the glass substrate, wherein an inorganic layer containing no phosphor is patterned or a patterned inorganic phosphor layer is not patterned on one surface of the glass substrate, And the light is emitted as it is through the space. The light guide plate has patterned phosphor layers for color conversion.

Wherein the glass substrate is a silicate-based one selected from the group consisting of alkali silicate, boro-silicate, alumino-silicate, lead-silicate and phosphate silicate And is an oxide-based glass selected from the group consisting of glass, oxyfluoride, and oxynitride.

The inorganic phosphor layer is formed by forming a phosphor powder by a spray coating method or by mixing a phosphor powder, a glass frit and an organic vehicle into a paste, screen printing and firing the phosphor powder, And can further contain an anti-scattering agent.

The phosphor powder includes yellow and green phosphors, and includes at least one kind of aluminum compound selected from the group consisting of yttrium aluminum garnet (YAG) and terbium aluminum garnet (TAG), red and green phosphors, silicate compounds, nitrate compounds, sulfides And at least one compound selected from the group consisting of a fluorine-based compound, a fluoride-based compound, an oxysulfide, an oxynitride, and an oxyfluoride-based compound.

The glass frit is characterized by being at least one transparent glass powder selected from the group consisting of silicates, borates and phosphates.

The scattering agent is to be SiO 2, Al 2 O 3, TiO 2, ZrO 2, Y 2 O 3, WO 3 is at least one such selected from the group consisting of and wherein the refractive index of the oxide.

The thickness of the glass substrate coated with the inorganic phosphor layer is 2 to 75 mm.

The light guide plate patterned with the color converting phosphor layer according to the present invention may further include a reflective layer on the other surface on which the inorganic phosphor layer is not patterned.

The present invention also relates to a glass substrate, An inorganic phosphor layer patterned on one surface of the glass substrate to emit red light and green light; And a blue light LED light source provided on one side of the glass substrate, wherein an inorganic layer containing no phosphor is patterned in the inorganic phosphor layer on one side of the glass substrate, or a space in which the inorganic phosphor layer is not patterned is formed And the blue light LED light source passes through the space and is emitted as it is. The display device of the present invention includes the light guide plate patterned with the color converting phosphor layer.

According to the present invention, by integrating the light guide plate, the diffuser plate, and the reflective layer included in the conventional LCD panel, the thickness of the LCD panel and the production cost can be greatly reduced, the LED price can be reduced by using the blue light LED instead of the white light LED, It is possible to simultaneously realize the effects of simplification of the process, lowering of the production cost, reduction of the thickness, and improvement of the luminance.

1 is a schematic view showing an LCD including a light guide plate patterned with a color converting phosphor layer according to an embodiment of the present invention.
2 is a schematic diagram showing a conventional LCD.
FIG. 3 (a) is a schematic view showing a display panel including a light guide plate patterned with a color conversion phosphor layer according to another embodiment of the present invention, and FIG. 3 (b) is a schematic view showing a conventional OLED.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving it will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The light guide plate 120, in which the color converting phosphor layer according to the present invention is patterned,

121, an inorganic phosphor layer 123, and a blue light LED light source 122.

Here, a space is formed in a part of the glass substrate 121 in which the inorganic layer containing no phosphor is patterned or the inorganic phosphor layer is not patterned, and the blue light LED light source 122 is formed in the inorganic phosphor layer Layer 123 and is discharged as it is.

The light guide plate 120 patterned with the color converting phosphor layer according to the present invention can significantly reduce the LCD panel thickness and the production cost by integrating the light guide plate, the diffuser plate, and the reflector plate included in the conventional LCD panel. It is possible to reduce the unit price of the LED by using the color filter of the liquid crystal display device, thereby simplifying the process, lowering the production cost, reducing the thickness, and improving the luminance.

The glass substrate 121 may be formed of a material selected from the group consisting of alkali-silicate, boro-silicate, alumino-silicate, lead-silicate and phosphate silicate Based glass or one kind of oxide glass selected from the group consisting of oxyfluoride and oxynitride.

The inorganic phosphor layer 123 may be formed by forming a phosphor powder by a spray coating method or by mixing a phosphor powder, a glass frit and an organic vehicle into a paste, followed by a screen printing method and firing have.

The phosphor powders are yellow and green phosphors, and include one kind of aluminum compound selected from the group consisting of yttrium aluminum garnet (YAG) and terbium aluminum garnet (TAG), and red and green phosphors, and silicate compounds, nitrate compounds, At least one compound selected from the group consisting of a fluorine-based compound, a fluoride-based compound, oxysulfide, oxynitride, and oxyfluoride-based compounds may be used.

In order to prevent deterioration of the red phosphor, the glass frit is preferably a glass material capable of being fired at a temperature of 600 ° C or lower. More specifically, one or more glass powders selected from the group consisting of silicate, borate and phosphate can be used.

The inorganic phosphor layer 123 may include at least one high refractive index oxide selected from the group consisting of SiO 2 , Al 2 O 3 , TiO 2 , ZrO 2 , Y 2 O 3 and WO 3 ≪ / RTI >

The thickness of the light guide plate 120 coated with the inorganic phosphor layer 123 is preferably 2 to 75 탆. When the thickness of the light guide plate 120 coated with the inorganic phosphor layer 123 is less than 2 占 퐉, the color conversion is insufficient and the color conversion efficiency and color purity decrease. On the other hand, when the thickness is more than 75 占 퐉, There is a problem that it becomes a burden on the panel thickness.

The organic vehicle may be an AC-based or EC-based paste.

In addition, the light guide plate 120 of the present invention may further include a reflective layer 110 on the other side where the inorganic phosphor layer is not patterned.

In the case where the light guide plate 120 patterned with the color converting phosphor layer according to the present invention further includes the reflective layer 110, the light transmitted through the light guide plate 120 is not emitted to the outside, thereby minimizing the light loss rate.

According to another aspect of the present invention, there is provided a display device including a light guide plate patterned with a phosphor layer for color conversion.

The display device includes a glass substrate 121, an inorganic phosphor layer 123, and a blue light LED light source 122.

The inorganic phosphor layer 123 may be patterned on one side of the glass substrate 121 to emit red light and green light.

The blue light LED light source 122 may be provided on one side of the glass substrate.

The inorganic phosphor layer 123 may be patterned on the upper or lower surface of the glass substrate 121 and the blue LED light source 122 may be arranged below the glass substrate 121 .

The display device may have a space in which the inorganic phosphor layer is not patterned on one surface of the glass substrate so that the blue light LED light source passes through the inorganic phosphor layer as it is.

According to another aspect of the present invention, the blue light LED light sources are arranged two-dimensionally on one side of the light guide plate and can be driven by a passive matrix (PM) or an active matrix (AM) Layer, and preferably includes a two-dimensional blue light LED array layer formed by a thin film transistor (TFT) and a blue light LED each formed of a single pixel.

Hereinafter, preferred embodiments will be described with reference to the drawings.

1 is a schematic view showing an LCD including a glass substrate on which a color converting phosphor layer is patterned according to an embodiment of the present invention.

1, an LCD 100 including a glass substrate on which a color conversion phosphor layer according to the present invention is patterned includes a glass substrate 121 and an inorganic phosphor layer 123, and the glass substrate 121, The inorganic phosphor layer 123 is formed.

The inorganic phosphor layer 123 is formed on the organic substrate 121 with a phosphor powder by a screen printing method.

At this time, the patterned portion of the phosphor powder made of yttrium aluminum garnet (YAG) and terbium aluminum garnet (TAG) emits green light and is selected from the group consisting of a silicate compound, a nitrate compound, a sulfide compound and a fluoride compound And the patterned portion of the at least one phosphor powder emits red light.

A blue light LED light source is provided on one side of the light guide plate 120.

A space 126 in which the inorganic phosphor layer 123 is not patterned is formed on a part of the light guide plate 120 and the blue light LED light source 122 is formed on the light guide plate 120, Passes through the space 126 and is discharged as it is.

The blue light LED light source 122 emits red light and green light through the red and green phosphor patterns 124 and the yellow and green phosphor patterns 125 in the inorganic phosphor layer 123, 126 to emit blue light and directly configure the RGB color necessary for the LCD panel.

In the case where the RGB color is formed through the inorganic phosphor layer 123 of the light guide plate 120, an advantage of replacing an essential color filter in an LCD panel is provided by providing a sub-pixel of the LCD .

The light emitted through the light guide plate 120 passes through the prism film 130, the first polarizer 140, the TFT layer 150, the liquid crystal 160, the upper plate glass 170, and the second polarizer 180 .

The light guiding plate 120 may further include a reflective layer 110 under the light guiding plate 120 to prevent loss of light incident through the blue light LED light source 122 provided at one side of the light guiding plate 120.

2 is a schematic diagram showing a conventional LCD.

2, the conventional LCD 200 includes a reflective layer 210, a light guide plate 220, a diffusion film 230, a prism film 240, a first polarizer 250, a TFT layer 260, a liquid crystal 270 A color filter 280, and a second polarizing plate 290, as shown in Fig.

The LCD 100 including the light guide plate patterned with the color converting phosphor layer according to an embodiment of the present invention is compared with the conventional LCD. In the present invention, the inorganic phosphor layer 123 is formed on the glass substrate 121 The function of the light guide plate 220 and the diffusion film 230 of the conventional LCD can be substituted.

Here, since the blue light LED light source 122 is dispersed by the random scattering effect of light while being transmitted along the inorganic phosphor layer 123, the diffusion film 230 can be replaced.

The light guide plate 220, the diffusion film 230, and the reflective layer 210 can be integrated with each other by forming the reflective layer 110 under the light guide plate 120, thereby greatly reducing the thickness and the process cost of the LCD.

Also, by providing the color for each pixel, it is possible to remove the color filter 280 of the conventional LCD, thereby increasing the durability of the product and lowering the production cost.

FIG. 3 (a) is a schematic view illustrating a display panel including a light guide plate patterned with a color conversion phosphor layer according to another embodiment of the present invention, and FIG. 3 (b) is a schematic view showing a conventional OLED.

3, a display panel 300 including a light guide plate patterned with a color conversion phosphor layer according to the present invention includes a lower plate glass 310, a TFT + blue light LED array 320, a glass substrate 331, And a light guide plate 330 including a phosphor layer 332. The conventional OLED 400 includes a TFT / lower plate glass 410, an electron transport layer 420, an organic light emitting layer 430, a hole transport layer 440, a buffer layer 450, an anode / ).

The TFT + blue LED array 320 may be a layer arranged with a two-dimensional LED composed of a combination of a blue light LED light source and a thin film transistor (TFT).

Therefore, when an LED is manufactured using a display panel including a light guide plate patterned with a color conversion phosphor layer according to the present invention, the thickness of the backlight unit is greatly reduced by drastically reducing the multilayer structure as compared with the conventional OLED And it is possible to manufacture an LED display which is manufactured from a pure inorganic material rather than an organic material and which is more durable than OLED and easy to manufacture.

Therefore, the light guide plate 120 in which the color converting phosphor layer according to the embodiment of the present invention is patterned can integrate the light guide plate 220, the diffusion film 230, and the reflective layer 210 of the conventional LCD, It is possible to replace the color filter of the conventional LCD by providing the color for each pixel, thereby increasing the durability of the product and lowering the production cost.

Although the embodiments of the light guide plate, the display device and the display panel including the color conversion phosphor layer according to the present invention have been described, various modifications are possible within the scope of the present invention. It is self-evident.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

100: LCD including a light guide plate patterned with a phosphor layer for color conversion
110: reflective layer 120: light guide plate
121: glass substrate 122: blue light LED light source
123: Inorganic phosphor layer 124: Red and green phosphor pattern 125: Yellow and green phosphor pattern 126: Unpatterned space
130: prism film 140: first polarizer plate
150: TFT layer 160: liquid crystal
170: upper plate glass 180: second polarizer plate
200: conventional LCD 210: reflective layer
220: light guide plate 230: diffusion film
240: prism film 250: first polarizer plate
260: TFT layer 270: liquid crystal
280: Color filter 290: Second polarizing plate
300: a display panel including a light guide plate patterned with a phosphor layer for color conversion
310: Lower plate glass 320: TFT + blue LED array
330: glass substrate 340: inorganic phosphor layer
400: conventional OLED 410: TFT / lower plate glass
420: electron transport layer 430: organic light emitting layer
440: hole transport layer 450: buffer layer
460: anode / top plate glass 470: polarizer

Claims (10)

A glass substrate;
An inorganic phosphor layer patterned on one surface of the glass substrate to emit red light and green light; And
And a blue light LED light source provided on one side of the glass substrate,
A space is formed on one surface of the glass substrate in which the inorganic layer containing no phosphor is patterned or the inorganic phosphor layer is not patterned so that the blue light LED light source passes through the inorganic phosphor layer and is emitted as it is Wherein the color conversion phosphor layer is patterned.
The method according to claim 1,
Wherein the glass substrate is selected from the group consisting of alkali-silicate, boro-silicate, alumino-silicate, lead-silicate and phosphate silicate Wherein the color conversion phosphor layer is one kind of oxide-based glass selected from the group consisting of one kind of silica-based glass or oxyfluoride and oxynitride.
The method according to claim 1,
Wherein the inorganic phosphor layer is formed by forming a phosphor powder by a spray coating method or by mixing a phosphor powder, a glass frit and an organic vehicle into a paste, screen printing and firing the phosphor layer. Patterned light guide plate.
The method of claim 3,
The phosphor powder includes yellow and green phosphors, and includes at least one kind of aluminum compound selected from the group consisting of yttrium aluminum garnet (YAG) and terbium aluminum garnet (TAG), red and green phosphors, silicate compounds, nitrate compounds, sulfides Wherein the color conversion phosphor layer is at least one selected from the group consisting of a phosphorous compound, a fluorinated compound, an oxysulfide, an oxynitride, and an oxyfluoride compound, Light guide plate.
The method of claim 3,
Wherein the glass frit is at least one glass powder selected from the group consisting of silicates, borates and phosphates.
The method of claim 3,
The inorganic fluorescent material layer is SiO 2, Al 2 O 3, TiO 2, ZrO 2, Y 2 O 3, WO 3 colors comprising the at least one high-refractive-index oxide selected from the group consisting of such as conversion phosphor for Wherein the layer is patterned.
The method according to claim 1,
Wherein the glass substrate coated with the inorganic phosphor layer has a thickness of 2 to 75 mm.
The method according to claim 1,
Wherein the light guide plate is patterned with the color converting phosphor layer further comprising a reflective layer on the other surface of the inorganic light emitting layer on which the inorganic fluorescent layer is not patterned.
A display device comprising a light guide plate according to any one of claims 1 to 7.
The blue light LED light source is arranged two-dimensionally on one side of the light guide plate of any one of claims 1 to 7 to form a layer capable of being driven by a passive matrix (PM) or an active matrix (AM) Further comprising a display panel.

KR1020150186215A 2015-12-24 2015-12-24 Light guide panel patterned color converting phosphor layer, display device and display panel comprising the same KR101806870B1 (en)

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