CN103337510A - Display with switchable mirror surface and manufacturing method thereof - Google Patents
Display with switchable mirror surface and manufacturing method thereof Download PDFInfo
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- CN103337510A CN103337510A CN2013102428508A CN201310242850A CN103337510A CN 103337510 A CN103337510 A CN 103337510A CN 2013102428508 A CN2013102428508 A CN 2013102428508A CN 201310242850 A CN201310242850 A CN 201310242850A CN 103337510 A CN103337510 A CN 103337510A
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- 239000000758 substrate Substances 0.000 claims abstract description 18
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 claims abstract 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 15
- 229910052719 titanium Inorganic materials 0.000 claims description 15
- 229910052709 silver Inorganic materials 0.000 claims description 14
- 229920002120 photoresistant polymer Polymers 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
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- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000007772 electrode material Substances 0.000 claims description 9
- 238000005401 electroluminescence Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 238000003384 imaging method Methods 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
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- 239000011159 matrix material Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 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
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8052—Cathodes
- H10K59/80524—Transparent cathodes, e.g. comprising thin metal layers
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Abstract
The invention discloses a display with a switchable mirror surface. The display comprises an upper baseplate, and an array substrate, as well as a plurality of pixel areas and a plurality of mirror surface areas, which are arranged on the array substrate at intervals; each mirror surface area comprises a lower electrode on the array substrate, an upper electrode on the upper baseplate, and a PDLC (Polymer Dispersed Liquid Crystal) layer between the former two; each pixel area comprises a pixel electrode electrically connected with the array substrate, an emitting layer on the pixel electrode, and a common electrode on the emitting layer. According to the invention, with the characters of the PDLC, the mirror surface areas which are used for realizing the mirror surface display function are arranged on the array substrate in a way of being alternated with the pixel areas, which solves the problems that the transmission rate is low and the cost is high as an extra liquid crystal panel is arranged on an organic luminous display; meanwhile, the switching between mirror surface display and normal display is realized.
Description
Technical field
The present invention relates to a kind of OLED display, particularly is the switchable OLED display of a kind of minute surface and manufacture method thereof.
Background technology
Organic electric exciting light-emitting diode (Organic Light-Emitting Diode, OLED) owing to possess self-luminous simultaneously, the characteristic of excellence such as do not need backlight, contrast height, thin thickness, the visual angle is wide, reaction speed is fast, can be used for the flexibility panel, the serviceability temperature scope wide, structure and processing procedure are simpler is considered to the emerging application technology of follow-on flat-panel screens.Because the OLED display does not need Polarizer, color film, and be the active illuminating display mode, so the transparent OLED display of making has higher transparency, transparency can reach more than 40%.
Mirror display is used thereby make display both can be used as display screen by half-reflecting mirror being sticked on OLED display the place ahead, can use as mirror again.But it is low to exist light transmittance, needs stronger backlight illumination, causes Overall Power Consumption to increase.Mirror effect can't switch in addition, when causing normally showing, under bright light environments, can't see screen content clearly.
In order to address the above problem, October in 2012, Taiwan on the 3rd patent 102709309A disclosed the changeable organic light emitting display of a kind of minute surface and minute surface switchable displays, as shown in Figure 1, the changeable organic light emitting display of this minute surface is by adding 1/4 a phase delay panel 200 at oled panel 100, realizes that the changeable function of minute surface can switch between general display mode and minute surface display mode.Solved because other mirror effect can't switch, when causing normally showing, under bright light environments, can't see the problem of screen content clearly.But this deposits the switching organic light emitting display, and there are the following problems: 1, light is through two-way mirror 300, and Polarizer 400 losses are serious, and transmitance is extremely low.2, additionally make liquid crystal panel 200, the cost height.
Summary of the invention
Goal of the invention: low and additionally make the high problem of liquid crystal panel cost for the transmitance of the changeable organic light emitting display of minute surface that solves prior art.
Technical scheme: for the foregoing invention purpose, the invention provides a kind of minute surface switchable displays, comprising: upper substrate, array base palte and be spaced a plurality of pixel regions and a plurality of mirror area on array base palte; Described each mirror area comprises, at the bottom electrode on the array base palte, at the top electrode on the upper substrate and the PDLC layer between bottom electrode and top electrode.
Further, described each pixel region comprises, the pixel electrode that electrically connects with array base palte, is positioned at the luminescent layer on the pixel electrode and is positioned at common electrode on the luminescent layer;
Further, array base palte comprises switching circuit TFT device and the insulating barrier that covers switching circuit and TFT device;
Further, the top electrode of described mirror area is made by ITO material or multilevel oxide combination electrode material; The bottom electrode of described mirror area is made by the material of both combinations or both above combinations among Ag or Al or Ti or Cu or Ag, Al, Ti and the Cu;
Further, described common electrode is made by ITO material or multilevel oxide combination electrode material; Described pixel electrode is by ITO or metal A g or Al or Ti, or among Cu or Ag, Al, Ti and the Cu both in conjunction with or the material of both above combinations make;
Further, described multilevel oxide combination electrode material can be ITO/Au/ITO or ITO/Au/ITO or ZnO/Cu/ZnO.
The present invention also provides a kind of manufacture method of minute surface switchable displays, comprises the steps:
Step 1: make pixel electrode and bottom electrode at array base palte, bottom electrode is positioned at the both sides of pixel electrode;
Step 2: be coated with photoresist at the array base palte that forms above-mentioned pattern;
Step 3: the photoresist to pixel region on the array base palte that forms above-mentioned pattern carries out exposure imaging, and then pixel region is carried out the luminescent layer film forming;
Step 4: form remaining part photoresist on the array base palte of above-mentioned pattern;
Step 5: the mirror sections that forms on the array base palte of above-mentioned pattern is injected PDLC solution;
Step 6: above-mentioned PDLC solution carries out UV and solidifies, and namely forms the PDLC layer;
Step 7: between adjacent two PDLC layers, make luminescent layer;
Step 8: form the top electrode of common electrode and PDLC at the array base palte that forms above-mentioned pattern after, then fit and go up transparency carrier.
The present invention gives another kind of minute surface switchable displays, comprising: an organic electroluminescence display panel comprises upper substrate, array base palte, a plurality of pixel region and a plurality of transparent area; Described pixel region and described transparent area are spaced; One PDLC panel is disposed at the array base palte side of described organic electroluminescence display panel, has a top electrode, this top electrode corresponding described array base palte, a bottom electrode and the PDLC layer between upper/lower electrode.
Further, described transparent area comprises the PDLC layer between the insulating barrier of described upper substrate and described array base palte;
Further, described top electrode is made by ITO or multilevel oxide combination electrode material; Described bottom electrode is made by the material of both combinations or both above combinations among Ag or Al or Ti or Cu or Ag, Al, Ti and the Cu.
Beneficial effect: the characteristic of utilizing PDLC, the present invention is arranged on array basically by the mirror area that can realize the minute surface Presentation Function, be arranged alternately with the pixel region of array base palte, saved on organic light emitting display, additionally to increase liquid crystal panel and then solved because of extra increase transmitance that liquid crystal panel causes and hanged down the high problem of cost that reaches, also realized minute surface and the normally switching of demonstration simultaneously.
Description of drawings
Fig. 1 is existing minute surface switchable displays structural representation;
Fig. 2 is the first embodiment of the invention structural representation;
Fig. 3 is for forming pixel electrode and bottom electrode schematic diagram;
Fig. 4 is for forming the photoresist schematic diagram;
Fig. 5 forms the pit schematic diagram at photoresist;
Fig. 6 injects PDLC solution schematic diagram at pit;
Fig. 7 solidifies schematic diagram for UV;
Fig. 8 is the photoresist lift off schematic diagram;
Fig. 9 is for forming the luminescent layer schematic diagram;
The schematic diagram of Figure 10 for forming common electrode and top electrode and going up transparency carrier;
Figure 11 is the second embodiment of the invention schematic diagram;
Among the figure, 10, oled panel, 200, postpone panel, 300, two-way mirror, 400, Polarizer, 10, go up transparency carrier, 11, glass substrate, 2, switching circuit, 4, TFT device, 22, insulating barrier, 3, pixel electrode, 5, photoresist, 7, luminescent layer, 82, common electrode, 71, the R chromatograph, 72, the G chromatograph, 73, B chromatograph, 1,31, bottom electrode, 81,33, top electrode, 6,32, the PDLC layer, 70, contact hole, 20, organic electroluminescence display panel, 30, the PDLC panel.
Embodiment
Below in conjunction with the drawings and specific embodiments, further illustrate the present invention, should understand these embodiment only is used for explanation the present invention and is not used in and limits the scope of the invention, after having read the present invention, those skilled in the art all fall within the application's claims institute restricted portion to the modification of the various equivalent form of values of the present invention.
PDLC, be called PDLC (Plymer Dpersed Lquid Crystal) again, to be liquid crystal be dispersed in the organic solid-state polymeric matrix with the little droplet of micron dimension PDLC, because the optical axis of the little droplet that is made of liquid crystal molecule is in freely and is orientated, the refractive index of its refractive index and matrix does not match, when light is opaque milky white state or translucent by the strong scattering of droplet during by matrix.Apply the direction of optic axis of electric field adjustable liquid crystal droplet, when both refractive indexes are complementary, present clear state.Remove electric field, liquid crystal droplet has the astigmatic state that recovers initial, thereby shows.
Utilize the characteristic of PDLC, realize a kind of minute surface switchable displays that need on the OLED display, additionally not increase liquid crystal panel.Fig. 2 to Figure 10 is the structural representation of the first embodiment of the present invention.
Figure 2 shows that a kind of minute surface switchable displays structural representation, each pixel cell of this OLED transparent display comprises: go up transparency carrier 10, array base palte, pixel region P and mirror area M, pixel region P and mirror area M are spaced on array base palte.
Array base palte comprises switching circuit 2, the TFT device 4 that is positioned on the glass substrate 11 and the insulating barrier 22 that covers switching circuit 2 and TFT device.
Pixel region P comprises: the pixel electrode 3 that electrically connects with TFT device 4, be positioned at luminescent layer 7 on the pixel electrode 3, be positioned at the common electrode 82 on the luminescent layer 7, wherein luminescent layer is R chromatograph 71 or G chromatograph 72 or B chromatograph 73, and wherein three luminescent layers are a RGB chromatograph unit 7.
Mirror area M comprises: bottom electrode 1, top electrode 81 and the PDLC layer 6 between bottom electrode 1 and top electrode 81, this PDLC layer 6 are all between adjacent two luminescent layers.
Wherein, the material of last transparency carrier 10 and array base palte is clear glass or transparent plastic; The voltage that the common electrode 82 of pixel region and the top electrode 81 of mirror area have same potential is to prevent causing two electric pole short circuits because of process deviation in manufacture process.
When normal the demonstration, the top electrode 81 of mirror area and bottom electrode 1 be making alive not, because the minute surface reflection of the scattering of the PDLC of PDLC layer 6 blocking-up bottom electrode 1 metal, so can realize normal demonstration.When minute surface shows, the top electrode 81 of mirror area and bottom electrode 1 making alive, the PDLC layer is pellucidity, extraneous light can be realized the minute surface reflection by the metal of bottom electrode 1.
Below be the manufacture method of above-mentioned a kind of minute surface switchable displays, the concrete grammar step is as follows:
The first step: as Fig. 3, with ITO material or metal A g, or Al, or Ti, or Cu or Ag, Al, the alloy of both combinations or both above combinations is made pixel electrode 3 at the array base palte with switching circuit 2 and TFT device 4 among Ti and the Cu, and use Ag, or Al, or Ti, or Cu or Ag, Al, the alloy material of both combinations or both above combinations is made bottom electrode 1 among Ti and the Cu, bottom electrode 1 is positioned at the both sides of pixel electrode 3, and pixel electrode 3 all is positioned on the insulating barrier 22 of array base palte 11 with bottom electrode 1, and pixel electrode 3 is connected with the drain electrode of TFT device 4, provides voltage by TFT device 4 for pixel electrode 3.
Second step: as Fig. 4, forming array base palte coating one deck photoresist 5 of above-mentioned pattern.
The 3rd step: as Fig. 5, on the array base palte that forms above-mentioned pattern, the photoresist 5 that is positioned at bottom electrode 1 place upper area is carried out exposure imaging; And the contact hole 70 of formation mirror area, this contact hole 70 is positioned at the top of insulating barrier 22.
The 4th step: as Fig. 6, in contact hole 70, inject PDLC solution 6.
The 5th step: as Fig. 7, by ultraviolet light above-mentioned PDLC solution 6 is carried out UV and solidify to form PDLC6.
The 6th step: as Fig. 8, remove remaining part photoresist 5 on the array base palte that forms above-mentioned pattern.
The 7th step: as Fig. 9, form luminescent layer 7 in the technology with evaporation or laser transfer or printing film forming at the array base palte 11 that forms above-mentioned pattern, wherein luminescent layer is R chromatograph 71 or G chromatograph 72 or B chromatograph 73, wherein three luminescent layers are a RGB chromatograph unit 7, and this luminescent layer 7 is between adjacent two PDLC layers.
The 8th step: as Figure 10, form one deck electrode layer 8 at the array base palte 11 that forms above-mentioned pattern, electrode layer 8 is made and is formed respectively the top electrode 81 of common electrode 82 and PDLC6 by the ITO material, then fit and go up transparency carrier 10.Common electrode 82 and pixel electrode 3 symmetries, top electrode 81 and bottom electrode 1 also symmetry; Electrode layer 8 also can be made by multilevel oxide combination electrode material ITO/Au/ITO or ITO/Au/ITO or ZnO/Cu/ZnO.
By using the PDLC layer as the adjusting that realizes transparency, PDLC is the solid-state light switch, need not diffuser plate and OLED processing procedure compatibility, has also improved the transmitance of light when having reduced cost.
The present invention gives second embodiment, and as shown in figure 11, different with first embodiment is, gets rid of top electrode and the bottom electrode of mirror area, makes mirror area become a transparent area T.It is oled panel 20 that described upper substrate 10, array base palte, a plurality of pixel region P and a plurality of transparent area T namely form an organic electroluminescence display panel.Applying PDLC panel 30 on the glass substrate 11 of the array base palte of organic electroluminescence display panel 20 simultaneously, this PDLC panel 30 comprise and are positioned at top electrode 31 and the bottom electrode 33 of PDLC layer about in the of 32; The material of top electrode 31 is ITO, and the material of bottom electrode 33 is Ag, Al, Ti, Cu or its alloy.
When normal the demonstration; the top electrode 31 of PDLC panel 30 and bottom electrode 33 be making alive not; there is not voltage control up and down because of PDLC layer 6 again; so the OLED display is in opaque state; the light process pixel electrode 3, the insulating barrier 22 that only have luminescent layer 7 to send; glass substrate 11 emergent raies realize that normal pictures shows.When minute surface showed, top electrode 31 and the bottom electrode 33 of PDLC panel 30 applied voltage, and PDLC layer 32 is pellucidity, and extraneous light can arrive the metal realization minute surface reflection of the bottom electrode 33 of PDLC panel 30 by PDLC layer 32.
Claims (10)
1. minute surface switchable displays comprises: upper substrate, array base palte and be spaced a plurality of pixel regions and a plurality of mirror area on array base palte; Described each mirror area comprises, at the bottom electrode on the array base palte, at the top electrode on the upper substrate and the PDLC layer between bottom electrode and top electrode.
2. minute surface switchable displays according to claim 1 is characterized in that: described each pixel region comprises, the pixel electrode that electrically connects with array base palte, is positioned at the luminescent layer on the pixel electrode and is positioned at common electrode on the luminescent layer.
3. minute surface switchable displays according to claim 2 is characterized in that: array base palte comprises switching circuit TFT device and the insulating barrier that covers switching circuit and TFT device.
4. minute surface switchable displays according to claim 1, it is characterized in that: the top electrode of described mirror area is made by ITO material or multilevel oxide combination electrode material; The bottom electrode of described mirror area is made by the material of both combinations or both above combinations among Ag or Al or Ti or Cu or Ag, Al, Ti and the Cu.
5. minute surface switchable displays according to claim 2, it is characterized in that: described common electrode is made by ITO material or multilevel oxide combination electrode material; Described pixel electrode is by ITO or metal A g or Al or Ti, or among Cu or Ag, Al, Ti and the Cu both in conjunction with or the material of both above combinations make.
6. according to claim 4 or 5 described minute surface switchable displays, it is characterized in that: described multilevel oxide combination electrode material can be ITO/Au/ITO or ITO/Au/ITO or ZnO/Cu/ZnO.
7. the manufacture method of a minute surface switchable displays is characterized in that, comprises the steps:
Step 1: make pixel electrode and bottom electrode at array base palte, bottom electrode is positioned at the both sides of pixel electrode;
Step 2: be coated with photoresist at the array base palte that forms above-mentioned pattern;
Step 3: the photoresist to pixel region on the array base palte that forms above-mentioned pattern carries out exposure imaging, and then pixel region is carried out the luminescent layer film forming;
Step 4: form remaining part photoresist on the array base palte of above-mentioned pattern;
Step 5: the mirror sections that forms on the array base palte of above-mentioned pattern is injected PDLC solution;
Step 6: above-mentioned PDLC solution carries out UV and solidifies, and namely forms the PDLC layer;
Step 7: between adjacent two PDLC layers, make luminescent layer;
Step 8: form the top electrode of common electrode and PDLC at the array base palte that forms above-mentioned pattern after, then fit and go up transparency carrier.
8. minute surface switchable displays comprises:
One organic electroluminescence display panel comprises, upper substrate, array base palte, a plurality of pixel region and a plurality of transparent area; Described pixel region and described transparent area are spaced;
One PDLC panel is disposed at the array base palte side of described organic electroluminescence display panel, has a top electrode, this top electrode corresponding described array base palte, a bottom electrode and the PDLC layer between upper/lower electrode.
9. minute surface switchable displays according to claim 8, it is characterized in that: described transparent area comprises the PDLC layer between the insulating barrier of described upper substrate and described array base palte.
10. minute surface switchable displays according to claim 8, it is characterized in that: described top electrode is made by ITO or multilevel oxide combination electrode material; Described bottom electrode is made by the material of both combinations or both above combinations among Ag or Al or Ti or Cu or Ag, Al, Ti and the Cu.
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