CN105304684A - Color display device and manufacturing method thereof - Google Patents
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- CN105304684A CN105304684A CN201510799501.5A CN201510799501A CN105304684A CN 105304684 A CN105304684 A CN 105304684A CN 201510799501 A CN201510799501 A CN 201510799501A CN 105304684 A CN105304684 A CN 105304684A
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Abstract
The invention provides a color display device and a manufacturing method thereof. The color display device comprises a color filtering base plate, an OLED base plate and quantum dot encapsulation glue, wherein the color filtering base plate and the OLED base plate are oppositely arranged and are adhered together via the quantum dot encapsulation glue. Triggered by blue light emitted out by the OLED base plate, the red light quantum points and green light quantum points in the quantum dot encapsulation glue emit out red light and green light respectively. After the red light and the green light are mixed with ground blue light, write light is formed. After the white light is transformed via a color filtering sheet, red, green and blue light are formed, thereby achieving color display. The light purity of the quantum points is high and colors can be controlled via diameters of the quantum points, thereby increasing color gamut and improving display quality of the color display device. The color display device is simple to manufacture and easy to operate and the manufactured color display device has quite wide gamut and quite high display quality.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of colour display device and preparation method thereof.
Background technology
Organic Light Emitting Diode (OLED) display, owing to possessing frivolous, the advantage such as wide viewing angle, fast response time, high-contrast, is more and more applied in flat panel display in recent years.At present, the OLED technology of main flow has AMOLED (Active-matrixorganiclightemittingdiode, the active matrix organic light-emitting diode) technology of Samsung and WOLED (white light OLED) technology of LG.AMOLED forms RGB three-colour light-emitting source by mask evaporation, realizes true color display.WOLED then and Yellow luminous layer blue by evaporation forms white light source, adds RGB color filter film (colorfilter), realizes true color display.Similar with WOLED, adopting the OLED of blue light-emitting to produce RGB tri-coloured light in conjunction with Color Conversion material, is also one of technology realizing true color display.
Quantum dot (QuantumDots, QDs), can claim again nanocrystalline, is a kind of nano particle be made up of II-VI group or iii-v element.The particle diameter of quantum dot is generally between 1 ~ 20nm, and because electronics and hole are by quantum confinement, continuous print band structure becomes the discrete energy levels structure with molecular characterization, can emitting fluorescence after being excited.
The emission spectrum of quantum dot can be controlled by the size changing quantum dot.Its emission spectrum can be made to cover whole visible region by the size and its chemical composition that change quantum dot.For CdTe quantum, when its particle diameter grows into 4.0nm from 2.5nm, their emission wavelength can from 510nm red shift to 660nm.
The fluorescence intensity of quantum dot and stability are all fine, at present, utilize the characteristics of luminescence of quantum dot, quantum dot can be applied to fluorescence labeling as molecular probe, also can be applied in display device, as the light emitting source of the backlight module of LCDs, form white light at the light being subject to sending after blue LED lamp excites and blue light colour mixture, it has larger colour gamut, can improve picture quality.
After quantum dot accepts royal purple optical excitation, be convertible into highly purified monochromatic light, color, by the diameter control of quantum dot, is applied to the colour gamut that panel display technologies can improve panel effectively, i.e. color reproducibility.
Have patent using quantum dot as Color Conversion material, be combined with blue light-emitting layer, realize a kind of light emitting diode with quantum dots display device and display unit, but the sub-pixel unit forming monochromatic quantum dot is at present very difficult, although can be able to be formed by the technology of photoetching or spray printing in theory, but relevant technology is also immature cannot volume production, and is difficult to realize high-res.
Summary of the invention
The object of the present invention is to provide a kind of colour display device, adopt quantum dot and OLED to arrange in pairs or groups and form backlight, and realize colored display in conjunction with colored filter, utilize the high and color of the luminance purity of quantum dot by the advantage of diameter control, effectively improve colour gamut and the display quality of colour display device.
The object of the invention is to the manufacture method that a kind of colour display device is also provided, adopt quantum dot and OLED to arrange in pairs or groups and form backlight, and realize colored display in conjunction with colored filter, make the colour display device obtained have wider colour gamut and excellent display quality.
The invention provides a kind of colour display device, comprise the colored optical filtering substrates and oled substrate that are oppositely arranged and the quantum dot packaging plastic described colored optical filtering substrates and the whole face of oled substrate bonded together;
Wherein, described colored optical filtering substrates comprises first substrate and is located at the colored filter on described first substrate; Described colored filter comprises Red lightscreening plate, green color filter and blue color filter;
Described oled substrate comprises second substrate, the TFT layer be located on described second substrate, the insulating barrier be located on described TFT layer, the reflecting electrode be located on described insulating barrier, the transparency electrode being located at the blue light-emitting layer on described reflecting electrode and being located on described blue light-emitting layer;
Described quantum dot packaging plastic comprises packaging plastic and the red light quantum point that is scattered in packaging plastic and green light quantum point;
When being energized to blue light-emitting layer both sides by reflecting electrode and transparency electrode, described blue light-emitting layer sends blue light, described blue light penetrates away from transparency electrode side, be irradiated in quantum dot packaging plastic, red light quantum point in described quantum dot packaging plastic and green light quantum point are subject to blue-light excitedly sending red, green glow respectively afterwards, form white light after described red, green glow and background blue light, described white light forms red, green, blue through after colored filter.
Described first substrate is transparency carrier, and described second substrate is transparent or opaque substrate.
The material of described transparency electrode is ITO or IZO; The material of described reflecting electrode is metal.
Described quantum dot packaging plastic also comprises gold-tinted quantum dot and/or cyan light quantum dot.
Described colored filter also comprises yellow filter and/or cyan filter.
The present invention also provides a kind of manufacture method of colour display device, comprises the steps:
Step 1, provide a first substrate, described first substrate makes colored filter, and described colored filter comprises Red lightscreening plate, green color filter and blue color filter, obtained colored optical filtering substrates;
Step 2, provide a second substrate, described second substrate makes TFT layer, insulating barrier, reflecting electrode, blue light-emitting layer and transparency electrode successively, obtains oled substrate;
Step 3, provide red light quantum point, green light quantum point and packaging plastic, described red light quantum point and green light quantum point are scattered in described packaging plastic, are uniformly dispersed, obtain quantum dot packaging plastic;
Step 4, this quantum dot packaging plastic coated described colored optical filtering substrates and be provided with the surface that the surface of colored filter side or described oled substrate are provided with transparency electrode side, whole face is smeared evenly, then described colored optical filtering substrates and oled substrate being fitted to organizing, obtaining a colour display device.
Described first substrate is transparency carrier, and described second substrate is transparent or opaque substrate.
The material of described transparency electrode is ITO or IZO; The material of described reflecting electrode is metal.
Described quantum dot packaging plastic also comprises gold-tinted quantum dot and/or cyan light quantum dot.
Described colored filter also comprises yellow filter and/or cyan filter.
Beneficial effect of the present invention: the invention provides a kind of colour display device and preparation method thereof, described colour display device, comprise the colored optical filtering substrates and oled substrate that are oppositely arranged and the quantum dot packaging plastic described colored optical filtering substrates and the whole face of oled substrate bonded together, what the red light quantum point in described quantum dot packaging plastic and green light quantum point were subject to that oled substrate sends sends red, green glow respectively blue-light excited afterwards, white light is formed with after background blue light, after colored filter conversion, form red, green, blue, thus realize colored display; Because the luminance purity of quantum dot is high, and color is by the diameter control of quantum dot, thus can improve colour gamut and the display quality of colour display device; Colour display device manufacture method processing procedure of the present invention is simple, easy to operate, and obtained colour display device has wider colour gamut and excellent display quality.Relative to WOLED technology, the present invention can reduce the Yellow luminous layer of evaporation one deck, reduces costs, and relative to the light emitting diode with quantum dots display device of monochromatic quantum dot sub-pix, manufacture difficulty is low, and easily realizes high-res.
In order to further understand feature of the present invention and technology contents, refer to following detailed description for the present invention and accompanying drawing, but accompanying drawing only provides reference and explanation use, is not used for being limited the present invention.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, by the specific embodiment of the present invention describe in detail, will make technical scheme of the present invention and other beneficial effect apparent.
In accompanying drawing,
Fig. 1 is the structural representation of colour display device of the present invention;
Fig. 2 is the schematic flow diagram of the manufacture method of colour display device of the present invention.
Embodiment
For further setting forth the technological means and effect thereof that the present invention takes, be described in detail below in conjunction with the preferred embodiments of the present invention and accompanying drawing thereof.
Refer to Fig. 1, the invention provides a kind of colour display device, comprise the colored optical filtering substrates 1 and oled substrate 2 that are oppositely arranged and the quantum dot packaging plastic 3 bonded together with the whole face of oled substrate 2 by described colored optical filtering substrates 1;
Wherein, described colored optical filtering substrates 1 comprises first substrate 11 and is located at the colored filter 12 on described first substrate 11; Described colored filter 12 comprises redness (R) filter 121, green (G) filter 122 and blue (B) filter 123;
Described oled substrate 2 comprises second substrate 21, the TFT layer 22 be located on described second substrate 21, the insulating barrier 23 be located on described TFT layer 22, the reflecting electrode 24 be located on described insulating barrier 23, the transparency electrode 26 being located at the blue light-emitting layer 25 on described reflecting electrode 24 and being located on described blue light-emitting layer 25;
Described quantum dot packaging plastic 3 comprises packaging plastic 31 and is scattered in red light quantum point in packaging plastic 31 32 and green light quantum point 33;
When being energized with transparency electrode 26 pairs of blue light-emitting layer 25 both sides by reflecting electrode 24, described blue light-emitting layer 25 sends blue light, described blue light penetrates away from transparency electrode 26 side, be irradiated in quantum dot packaging plastic 3, red light quantum point in described quantum dot packaging plastic 3 32 and green light quantum point 33 are subject to blue-light excitedly sending red, green glow respectively afterwards, form white light after described red, green glow and background blue light, described white light forms red, green, blue through after colored filter 12.
Concrete, described reflecting electrode 24, transparency electrode 26 are respectively the combination in any to the cathode and anode that blue light-emitting layer 25 is energized.
Preferably, the material of described transparency electrode 26 is ITO (tin indium oxide) or IZO (indium zinc oxide).
Concrete, described reflecting electrode 24 is opaque metal electrode, can ensure that the light reflection of directive second substrate 21 side that described blue light-emitting layer 25 sends goes back, finally launch from transparency electrode 26 side, thus improves the utilance of light.
Preferably, the material of described reflecting electrode 24 is one or more the combination in copper (Cu), aluminium (Al), molybdenum (Mo), titanium (Ti).
Concrete, described first substrate 11 is transparency carrier, thus the light filtered from colored filter 12 is launched from this first substrate 11 side.
Concrete, described second substrate 21 is transparent or opaque substrate.
Concrete, described TFT layer 22 comprises several TFT (thin-film transistor) 221 of the arrangement in matrix, and several sub-pixels of corresponding colour display device are arranged respectively.
Concrete, the material of described insulating barrier 23 can be silica (SiOx), silicon nitride (SiNx) or the combination of the two.
Further, described quantum dot packaging plastic 3 can also comprise gold-tinted quantum dot and/or cyan light quantum dot; Described colored filter 12 can also comprise yellow (yellow) filter and/or cyan (cyan) filter, thus makes colour display device can realize four looks or five colors display, improves colour gamut and the display quality of display unit.
Concrete, described packaging plastic 31 can be any glue or adhesive with adhesive effect.
A kind of colour display device provided by the invention, comprise the colored optical filtering substrates 1 and oled substrate 2 that are oppositely arranged and the quantum dot packaging plastic 3 bonded together with the whole face of oled substrate 2 by described colored optical filtering substrates 1, what red light quantum point in described quantum dot packaging plastic 3 32 and green light quantum point 33 were subject to that oled substrate 2 sends sends red, green glow respectively blue-light excited afterwards, white light is formed with after background blue light, form red, green, blue after colored filter 12 is irradiated, thus realize colored display; Because the luminance purity of quantum dot is high, and color is by the diameter control of quantum dot, thus can improve colour gamut and the display quality of colour display device.Relative to WOLED display unit, the present invention can reduce the Yellow luminous layer of evaporation one deck, reduces costs, and relative to the light emitting diode with quantum dots display device of monochromatic quantum dot sub-pix, manufacture difficulty is low, and easily realizes high-res.
Refer to Fig. 2, the present invention also provides a kind of manufacture method of colour display device, comprises the steps:
Step 1, provide a first substrate 11, described first substrate 11 makes colored filter 12, and described colored filter 12 comprises Red lightscreening plate 121, green color filter 122 and blue color filter 123, obtained colored optical filtering substrates 1.
Concrete, described first substrate 11 is transparency carrier, thus the light filtered from colored filter 12 is launched from this first substrate 11 side.
Concrete, described colored filter 12 can also comprise yellow filter and/or cyan filter, thus makes colour display device can realize four looks or five colors display, improves colour gamut and the display quality of display unit.
Step 2, provide a second substrate 21, described second substrate 21 makes TFT layer 22, insulating barrier 23, reflecting electrode 24, blue light-emitting layer 25 and transparency electrode 26 successively, obtains oled substrate 2;
Concrete, described second substrate 21 is transparent or opaque substrate.
Concrete, described TFT layer 22 comprises several TFT (thin-film transistor) 221 of the arrangement in matrix, and several sub-pixels of corresponding colour display device are arranged respectively.
Concrete, the material of described insulating barrier 23 can be silica (SiOx), silicon nitride (SiNx) or the combination of the two.
Concrete, described reflecting electrode 24, transparency electrode 26 are respectively the combination in any to the cathode and anode that blue light-emitting layer 25 is energized.
Preferably, the material of described transparency electrode 26 is ITO (tin indium oxide).
Concrete, described reflecting electrode 24 is opaque metal electrode, can ensure that the light reflection of directive second substrate 21 side that described blue light-emitting layer 25 sends goes back, finally launch from transparency electrode 26 side, thus improves the utilance of light.
Preferably, the material of described reflecting electrode 24 is one or more the combination in copper (Cu), aluminium (Al), molybdenum (Mo), titanium (Ti).
Concrete, described blue light-emitting layer 25 is obtained by evaporation coating method.
Step 3, provide red light quantum point 32, green light quantum point 33 and packaging plastic 31, described red light quantum point 32 is scattered in described packaging plastic 31 with green light quantum point 33, is uniformly dispersed, obtains quantum dot packaging plastic 3.
Concrete, described packaging plastic 31 can be any glue or adhesive with adhesive effect.
Concrete, gold-tinted quantum dot and/or cyan light quantum dot can also be dispersed with in described quantum dot mixture, thus make colour display device can realize four looks or five colors display, improve colour gamut and the display quality of display unit.
Step 4, this quantum dot packaging plastic 3 coated described colored optical filtering substrates 1 and be provided with the surface that the surface of colored filter 12 side or described oled substrate 2 are provided with transparency electrode 26 side, whole face is smeared evenly, then described colored optical filtering substrates 1 being fitted to organizing with oled substrate 2, obtaining a colour display device.
Concrete, described step 4 is carried out in the environment of anhydrous and anaerobic.
The manufacture method of a kind of colour display device provided by the invention, manufacture method is simple, obtained colour display device comprises the colored optical filtering substrates 1 and oled substrate 2 that are oppositely arranged, and by quantum dot packaging plastic 3 that described colored optical filtering substrates 1 and the whole face of oled substrate 2 bond together, red light quantum point in described quantum dot packaging plastic 3 32 and green light quantum point 33 be subject to that oled substrate 2 sends blue-light excited rear send respectively red, green glow, white light is formed with after background blue light, formed red after colored filter 12 is changed, green, blue light, thus realize colored display, because the luminance purity of quantum dot is high, and color is by the diameter control of quantum dot, thus can improve colour gamut and the display quality of colour display device.Relative to WOLED technology, the present invention can reduce the Yellow luminous layer of evaporation one deck, reduces costs, and relative to the light emitting diode with quantum dots display device of monochromatic quantum dot sub-pix, manufacture difficulty is low, and easily realizes high-res.
The above, for the person of ordinary skill of the art, can make other various corresponding change and distortion according to technical scheme of the present invention and technical conceive, and all these change and be out of shape the protection range that all should belong to the claims in the present invention.
Claims (10)
1. a colour display device, it is characterized in that, comprise the colored optical filtering substrates (1) and oled substrate (2) that are oppositely arranged and the quantum dot packaging plastic (3) bonded together in described colored optical filtering substrates (1) and oled substrate (2) whole face;
Wherein, described colored optical filtering substrates (1) comprises first substrate (11) and is located at the colored filter (12) on described first substrate (11); Described colored filter (12) comprises Red lightscreening plate (121), green color filter (122) and blue color filter (123);
Described oled substrate (2) comprises second substrate (21), the TFT layer (22) be located on described second substrate (21), the insulating barrier (23) be located on described TFT layer (22), the reflecting electrode (24) be located on described insulating barrier (23), the transparency electrode (26) being located at the blue light-emitting layer (25) on described reflecting electrode (24) and being located on described blue light-emitting layer (25);
Described quantum dot packaging plastic (3) comprises packaging plastic (31) and is scattered in red light quantum point (32) in packaging plastic (31) and green light quantum point (33);
When being energized to blue light-emitting layer (25) both sides with transparency electrode (26) by reflecting electrode (24), described blue light-emitting layer (25) sends blue light, described blue light penetrates away from transparency electrode (26) side, be irradiated in quantum dot packaging plastic (3), red light quantum point (32) in described quantum dot packaging plastic (3) and green light quantum point (33) be subject to blue-light excited rear send respectively red, green glow, described red, white light is formed after green glow and background blue light, described white light is formed red through colored filter (12) afterwards, green, blue light.
2. colour display device as claimed in claim 1, it is characterized in that, described first substrate (11) is transparency carrier, and described second substrate (21) is transparent or opaque substrate.
3. colour display device as claimed in claim 1, it is characterized in that, the material of described transparency electrode (26) is ITO or IZO; The material of described reflecting electrode (24) is metal.
4. colour display device as claimed in claim 1, it is characterized in that, described quantum dot packaging plastic (3) also comprises gold-tinted quantum dot and/or cyan light quantum dot.
5. colour display device as claimed in claim 1, it is characterized in that, described colored filter (12) also comprises yellow filter and/or cyan filter.
6. a manufacture method for colour display device, is characterized in that, comprises the steps:
Step 1, provide a first substrate (11), described first substrate (11) makes colored filter (12), described colored filter (12) comprises Red lightscreening plate (121), green color filter (122) and blue color filter (123), obtained colored optical filtering substrates (1);
Step 2, provide a second substrate (21), described second substrate (21) makes TFT layer (22), insulating barrier (23), reflecting electrode (24), blue light-emitting layer (25) and transparency electrode (26) successively, obtains oled substrate (2);
Step 3, provide red light quantum point (32), green light quantum point (33) and packaging plastic (31), described red light quantum point (32) and green light quantum point (33) are scattered in described packaging plastic (31), be uniformly dispersed, obtain quantum dot packaging plastic (3);
Step 4, this quantum dot packaging plastic (3) coated described colored optical filtering substrates (1) and be provided with the surface that the surface of colored filter (12) side or described oled substrate (2) are provided with transparency electrode (26) side, whole face is smeared evenly, then described colored optical filtering substrates (1) and oled substrate (2) being fitted to organizing, obtaining a colour display device.
7. the manufacture method of colour display device as claimed in claim 6, it is characterized in that, described first substrate (11) is transparency carrier, and described second substrate (21) is transparent or opaque substrate.
8. the manufacture method of colour display device as claimed in claim 6, it is characterized in that, the material of described transparency electrode (26) is ITO or IZO; The material of described reflecting electrode (24) is metal.
9. the manufacture method of colour display device as claimed in claim 6, it is characterized in that, described quantum dot packaging plastic (3) also comprises gold-tinted quantum dot and/or cyan light quantum dot.
10. the manufacture method of colour display device as claimed in claim 6, it is characterized in that, described colored filter (12) also comprises yellow filter and/or cyan filter.
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