CN106024835A - Transparent display panel and preparation method thereof - Google Patents
Transparent display panel and preparation method thereof Download PDFInfo
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- CN106024835A CN106024835A CN201610390763.0A CN201610390763A CN106024835A CN 106024835 A CN106024835 A CN 106024835A CN 201610390763 A CN201610390763 A CN 201610390763A CN 106024835 A CN106024835 A CN 106024835A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000000758 substrate Substances 0.000 claims abstract description 37
- 238000002834 transmittance Methods 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000000151 deposition Methods 0.000 claims description 11
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000003475 lamination Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 6
- 239000010408 film Substances 0.000 claims description 5
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000010409 thin film Substances 0.000 claims description 5
- 239000002086 nanomaterial Substances 0.000 claims description 4
- 239000002096 quantum dot Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 8
- 239000010410 layer Substances 0.000 description 77
- 230000005540 biological transmission Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 6
- 239000011241 protective layer Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011368 organic material Substances 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000002161 passivation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000027756 respiratory electron transport chain Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 208000007578 phototoxic dermatitis Diseases 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
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Abstract
The invention provides a transparent display panel and a preparation method thereof. The transparent display panel comprises a substrate and a display unit, wherein the display unit is arranged on the substrate and is divided into a display region and a non-display region; the non-display region is made of a light-transmitting material; the light transmittance of the non-display region is 50%-80%; the display region is provided with a light-emitting component; the light-emitting component comprises a semi-transparent and semi-reflective electrode, a light-emitting layer, a transparent electrode and a light extraction layer which are sequentially arranged; and the light transmittance of the display region is 20%-50%.
Description
Technical field
The invention belongs to technical field of flat panel display, particularly relate to a kind of transparent display panel and preparation method thereof.
Background technology
In the present age of information-intensive society, the importance as the display of visual information transmission medium is adding further
By force, in order to occupy leading position in future, display just towards gentlier, thinner, more low energy consumption, lower one-tenth
The trend development of basis and more preferably picture quality.Organic electroluminescent LED (OLED) has due to it
The advantages such as self-luminous, reaction are soon, visual angle is wide, brightness is high, frivolous, its market potential prospect is seen by industry
Good.Light emitting diode with quantum dots (QLED) is owing to its light excitation is high, luminous quantum efficiency is high, luminous
The advantages such as color easily tune, have become the contenders of OLED in recent years.Therefore, both Display Techniques are
Two Main way of display field development at present.
Owing to OLED, QLED have the autonomous characteristics of luminescence, it need not backlight, therefore can realize
Transparence Display.Transparent OLED or QLED display, have can the self-luminous simultaneously transparent advantage of light,
It is expected to become the main flow of following novel Display Technique.Existing transparent display is mainly by non-luminescent picture
Element region uses light transmissive material to realize Transparence Display, and light emitting pixel unit itself is owing to have employed reflecting electrode,
The non-light transmittance of reflecting electrode causes the light transmission of whole transparent display panel more weak, its structure such as Fig. 1 a, figure
Shown in 1b, wherein, Fig. 1 a is top emissive displays part, Fig. 1 b be bottom emitting escope part (Fig. 1 a,
In Fig. 1 b, label 1 '-4 ' represent substrate, reflecting electrode, luminescent layer and transparency electrode successively).Additionally,
Also the yin, yang electrode having light emitting pixel unit all uses transparent material to prepare, and the display floater now obtained is saturating
Photosensitiveness is relatively strong, but the brightness that simultaneously will also result in display end is greatly reduced, thus causes transparent display panel
Contrast reduces.Therefore, prior art is further improved and develops.
Summary of the invention
It is an object of the invention to provide a kind of transparent display panel, it is intended to solve the transparent of prior art offer
The problem that the light transmission of display floater and contrast can not be taken into account.
Another object of the present invention is to provide the preparation method of a kind of transparent display panel.
The present invention is achieved in that a kind of transparent display panel, aobvious be arranged on substrate including substrate
Show that unit, described display unit are divided into viewing area and non-display area, described non-display area to be made up of light transmissive material,
And the light transmittance of described non-display area is 50-80%；Described viewing area is provided with emitting components, described luminescence
Components and parts include translucent half reflection electrode, luminescent layer, transparency electrode and the light removing layer set gradually, and
The light transmittance of described viewing area is 20-50%.
And, the preparation method of a kind of transparent display panel, comprise the following steps:
Thering is provided a TFT substrate with tft array, above described tft array, borehole, formation connect
Hole；
Make translucent half reflection electrode on the substrate, and described translucent half reflection electrode is by described
Connecting hole is connected with described tft array；
Described translucent half reflection electrode is sequentially depositing luminescent layer and transparency electrode；
Described transparency electrode makes light removing layer.
Or, the preparation method of a kind of transparent display panel, comprise the following steps:
One TFT substrate with tft array is provided；
Make light removing layer on the substrate, borehole, formation connecting hole above described tft array；
Described smooth removing layer deposits transparency electrode, and described transparency electrode passes through described connecting hole with described
Tft array is connected；
Described transparency electrode is sequentially depositing luminescent layer and translucent half reflection electrode.
The transparent display panel that the present invention provides, goes out light in described emitting components (light emitting pixel unit)
Side arranges transparency electrode and combines the structure of light removing layer to improve light extraction efficiency, uses half in non-light emission side simultaneously
Reflection semitransparent electrode realizes the semi-transparency of light emitting pixel unit, and then strengthens whole transparent display panel
Light transmission.The transparent display panel that the present invention provides, described transparency electrode superimposed light removing layer and described
Arrange while semi-reflection and semi transparency electrode, can not drop while strengthening transparent display panel light transmission
The brightness of low display end and contrast so that described transparent display panel has preferable light transmission and contrast concurrently
Degree.The preparation method of the transparent display panel that the present invention provides, simple and easy to control, it is easy to accomplish industrialization.
Accompanying drawing explanation
Fig. 1 a is the structural representation of the top emissive displays part that prior art provides；
Fig. 1 b is the structural representation of the bottom emitting escope part that prior art provides；
Fig. 2 a is the structural representation of the top emission type transparent display panel that the embodiment of the present invention provides；
Fig. 2 b is the structural representation of the bottom emitting type transparent display panel that the embodiment of the present invention provides；
Fig. 3 is the preparation technology flow chart of the top emission type transparent display panel that the embodiment of the present invention provides；
Fig. 4 is the preparation technology flow chart of the bottom emitting type transparent display panel that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearer, with
Under in conjunction with the embodiments, the present invention is further elaborated.Should be appreciated that described herein specifically
Embodiment only in order to explain the present invention, is not intended to limit the present invention.
In conjunction with Fig. 2 a, Fig. 2 b, embodiments provide a kind of transparent display panel, including substrate 1 He
The display unit being arranged on substrate, described display unit is divided into viewing area a and non-display area b, described non-
Viewing area b is made up of light transmissive material, and the light transmittance of described non-display area b is 50-80%；Described viewing area
A is provided with emitting components, and described emitting components includes the translucent half reflection electrode 2 set gradually, sends out
Photosphere 3, transparency electrode 4 and light removing layer 5, and the light transmittance of described viewing area a is 20-50%.
Transparent display panel described in the embodiment of the present invention can be arranged to top emission type translucent display substrate or the end is sent out
Emitting display floater.
As a preferred embodiment, described transparent display panel is top emission type translucent display substrate, described
Translucent half reflection electrode 2 is arranged on described substrate 1, described translucent half reflection electrode 2, luminescent layer 3,
Transparency electrode 4 and light removing layer 5 set gradually from the bottom up.As particular preferred embodiment, such as Fig. 2 a
Shown in, described transparent display panel includes substrate 1 and the display unit being arranged on substrate, described display list
Unit is divided into viewing area a and non-display area b, described non-display area b to be made up of light transmissive material, and described non-aobvious
The light transmittance showing district b is 50-80%；Described viewing area a is provided with emitting components, described emitting components
Take out including the translucent half reflection electrode 2 set gradually from the bottom up, luminescent layer 3, transparency electrode 4 and light
Layer 5, and the light transmittance of described viewing area a is 20-50%.
As another preferred embodiment, described transparent display panel is bottom emitting type display floater, described light
Removing layer 5 is arranged on described substrate 1, described smooth removing layer 5, transparency electrode 4, luminescent layer 3 and semi-transparent
Bright half reflection electrode 2 sets gradually from the bottom up.As particular preferred embodiment, as shown in Figure 2 b, described
Transparent display panel includes substrate 1 and the display unit being arranged on substrate, and described display unit is divided into display
District a and non-display area b, described non-display area b are made up of light transmissive material, and described non-display area b's is saturating
Light rate is 50-80%；Described viewing area a is provided with emitting components, and described emitting components includes from lower past
On the light removing layer 5, transparency electrode 4, luminescent layer 3 and the translucent half reflection electrode 2 that set gradually, and institute
The light transmittance stating viewing area a is 20-50%.
Concrete, in the embodiment of the present invention, described TFT substrate 1 has for driving described luminous unit device
The tft array of part, and the tft array that described tft array is this area conventional structure.
Described emitting components is OLED or QLED device, including translucent half set gradually instead
Radio pole 2, luminescent layer 3, transparency electrode 4 and light removing layer 5.
Wherein, described translucent half reflection electrode 2 is preferably conductive metal film, further, described half
The thickness of transparent half reflection electrode 2 is preferably 10-25nm.The described translucent half reflection electricity of this preferred thickness
Pole 2, can permeation parts natural light outside, again can the light of reflecting part internal emission, thus strengthen whole
The light transmission of transparent display panel.
Described luminescent layer 3 at least includes light-emitting layer, and described luminescent layer 3 can be according to luminescent device type
Difference, selects luminous organic material or quantum dot light emitting material, the most described luminescent layer 3 be organic luminous layer or
Quantum dot light emitting layer.Preferably, in order to improve the luminous efficiency of described luminescent device, described luminescent layer 3 is also
Can include hole injection layer, hole transmission layer, electron transfer layer, electron injecting layer, hole blocking layer,
At least one of which in electronic barrier layer.As preferred embodiment, described luminescent layer 3 for include hole injection layer,
Hole transmission layer, light-emitting layer, electron transfer layer, electron injecting layer, hole blocking layer, electronic barrier layer
Multilayer laminate constructions.
Described transparency electrode 4 is preferably conducting metal oxide or metallic film.As particular preferred embodiment,
Described transparency electrode 4 is formed by conducting metal oxide, metal and conducting metal oxide lamination, and this is preferred
Described transparency electrode 4, i.e. ensure that light transmission, there is again good electric conductivity.
The setting of described smooth removing layer 5, it is possible to strengthen the amount of light of light emission side, reduces described translucent half instead
The impact that the light emission side amount of light that radio pole 2 is brought reduces, thus realize strengthening the same of display floater light transmission
Time, slow down or avoid light emission side amount of light to reduce the display floater contrast that causes and decline.
Further, as a preferred embodiment, described smooth removing layer 5 is tied at light emission side face superposition micro-nano
Structure, thus reduce total reflection, improve light extraction efficiency；As another preferred embodiment, described smooth removing layer
5 arrange refractive index graded bed at light emission side face lamination, thus reduce total reflection, improve light extraction efficiency；As
Another preferred embodiment, the light that described smooth removing layer 5 introduces in light emission side face containing optical scatter takes out thin
Film, thus reduce total reflection, improve light extraction efficiency.
The embodiment of the present invention, the material of described smooth removing layer 5, according to the difference of concrete structure, can use ability
The material for forming light removing layer that territory is conventional, when as described in light removing layer 5 at light emission side face superposition micro-nano
During structure, described smooth removing layer 5 can use the preparation of organic or inorganic material to be formed；When described smooth removing layer 5
When introducing the light taking-up thin film containing optical scatter in light emission side face, described smooth removing layer 5 can use organic material
The material inorganic scattering particles of doping are formed.
In the embodiment of the present invention, described non-display area b is bright zone, can pass through nature light, and light transmittance is
50-80%, can be effectively ensured the light transmission of described non-display area b；Described viewing area a is translucent areas,
Light-permeable part nature light, light transmittance is 20%-50%, can possess certain light transmission, meanwhile, permissible
It is prevented effectively from being greatly reduced of display end brightness.
The transparent display panel that the embodiment of the present invention provides, the light emission side at light emitting pixel unit arranges transparent electrical
Pole combines the structure of light removing layer to improve light extraction efficiency, uses semi-reflection and semi transparent electrical in non-light emission side simultaneously
Pole realizes the semi-transparency of light emitting pixel unit, and then strengthens the light transmission of whole transparent display panel.This
The transparent display panel that bright embodiment provides, described transparency electrode superimposed light removing layer and described half reflection
Arrange while semitransparent electrode, can not reduce display while strengthening transparent display panel light transmission
The brightness of end and contrast so that described transparent display panel has preferable light transmission and contrast concurrently.
The transparent display panel that the embodiment of the present invention provides, can be prepared by following method.
Correspondingly, in conjunction with Fig. 3, embodiments provide the preparation method of a kind of transparent display panel,
Comprise the following steps:
S01., one TFT substrate with tft array, borehole, formation above described tft array are provided
Connecting hole；
Make translucent half reflection electrode the most on the substrate, and described translucent half reflection electrode passes through
Described connecting hole is connected with described tft array；
S03. on described translucent half reflection electrode, it is sequentially depositing luminescent layer and transparency electrode；
S04. in described transparency electrode, make light removing layer.
Concrete, in above-mentioned steps S01, described TFT substrate has for driving described emitting components
Tft array, and the tft array that described tft array is this area conventional structure.Preferably, described
Tft array surface can be coated with protective layer, and described protective layer is passivation layer.Further, described protection
Flatness layer can be set on Ceng.Should be appreciated that above-mentioned steps S01 be additionally included in borehole above described tft array,
Make for realizing electrical connection between the S/D electrode of described tft array and described translucent half reflection electrode
Connecting hole.Described connecting hole position and implementation are set, all can use this area usual manner.
In above-mentioned steps S02, the method making translucent half reflection electrode on the substrate the most strictly limits
System, can prepare the method realization of electrode by routine.In the embodiment of the present invention, in order to realize effectively being electrically connected
Connecing, described translucent half reflection electrode is connected with described tft array by described connecting hole.
In above-mentioned steps S03, described translucent half reflection electrode is sequentially depositing luminescent layer and transparency electrode
Method unrestricted, this area conventional method can be used to realize.
In above-mentioned steps S04, depositing light removing layer in described transparency electrode, described smooth removing layer can enter
One step carries out structure improvement, to reduce total reflection, improves light extraction efficiency.As a preferred embodiment, institute
State light removing layer at light emission side face superposition micro-nano structure；As another preferred embodiment, described smooth removing layer
In light emission side face, lamination arranges refractive index graded bed；As another preferred embodiment, described smooth removing layer exists
Light emission side face introduces the light containing optical scatter and takes out thin film.
Further, also include being packaged transparent display panel processing.
In conjunction with Fig. 4, the embodiment of the present invention additionally provides the preparation method of a kind of transparent display panel, including with
Lower step:
D01., one TFT substrate with tft array is provided；
Make light removing layer the most on the substrate, borehole, formation connecting hole above described tft array；
D03. on described smooth removing layer deposit transparency electrode, and described transparency electrode by described connecting hole with
Described tft array is connected；
D04. in described transparency electrode, it is sequentially depositing luminescent layer and translucent half reflection electrode.
Concrete, in above-mentioned steps D01, described TFT substrate has for driving described emitting components
Tft array, and the tft array that described tft array is this area conventional structure.Preferably, described
Tft array surface can be coated with protective layer, and described protective layer is passivation layer.Further, described protection
Flatness layer can be set on Ceng.
In above-mentioned steps D02, deposition light removing layer on the substrate, described smooth removing layer can be further
Carry out structure improvement, to reduce total reflection, improve light extraction efficiency.As a preferred embodiment, described light
Removing layer is at light emission side face superposition micro-nano structure；As another preferred embodiment, described smooth removing layer is going out
Light side lamination arranges refractive index graded bed；As another preferred embodiment, described smooth removing layer is going out light
The lateral leadin light containing optical scatter takes out thin film.
Further, above-mentioned steps D02 is additionally included in borehole above described tft array, makes for realizing
The connecting hole of electrical connection between S/D electrode and the described transparency electrode of described tft array.Described connecting hole
Position and implementation are set, all can use this area usual manner.
In above-mentioned steps D03, the mode depositing transparency electrode on described smooth removing layer is unrestricted, can adopt
Realize by this area conventional method.In the embodiment of the present invention, in order to realize effectively electrically connecting, described transparent
Electrode is connected with described tft array by described connecting hole.
In above-mentioned steps D04, described transparency electrode is sequentially depositing luminescent layer and translucent half reflection electrode
Mode unrestricted, this area conventional method can be used to realize.
Further, also include being packaged transparent display panel processing.
The preparation method of the transparent display panel that the embodiment of the present invention provides, simple and easy to control, it is easy to accomplish industry
Change.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this
Any amendment, equivalent and the improvement etc. made within bright spirit and principle, should be included in the present invention
Protection domain within.
Claims (10)
1. a transparent display panel, including substrate and the display unit being arranged on substrate, described display list
Unit is divided into viewing area and non-display area, it is characterised in that described non-display area is made up of light transmissive material, and institute
The light transmittance stating non-display area is 50-80%；Described viewing area is provided with emitting components, described luminous unit device
Part includes translucent half reflection electrode, luminescent layer, transparency electrode and the light removing layer set gradually, and described
The light transmittance of viewing area is 20-50%.
2. transparent display panel as claimed in claim 1, it is characterised in that described transparent display panel is
Top emission type translucent display substrate, described translucent half reflection electrode is arranged on the substrate, described semi-transparent
Bright half reflection electrode, luminescent layer, transparency electrode and light removing layer are cascading from the bottom up.
3. transparent display panel as claimed in claim 1, it is characterised in that described transparent display panel is
Bottom emitting type display floater, described smooth removing layer is arranged on the substrate, described smooth removing layer, transparent electrical
Pole, luminescent layer and translucent half reflection electrode are cascading from the bottom up.
4. the transparent display panel as described in claim 1-3 is arbitrary, it is characterised in that described smooth removing layer
In light emission side face, micro-nano structure is set；Or
Described smooth removing layer arranges refractive index graded bed at light emission side face lamination；Or
The light that described smooth removing layer introduces in light emission side face containing optical scatter takes out thin film.
5. the transparent display panel as described in claim 1-3 is arbitrary, it is characterised in that described translucent half
Reflecting electrode is conductive metal film, and the thickness of described conductive metal film is 10-25nm.
6. the transparent display panel as described in claim 1-3 is arbitrary, it is characterised in that described transparency electrode
For conducting metal oxide or conductive metal film.
7. transparent display panel as claimed in claim 1, it is characterised in that described transparency electrode is by conducting electricity
Metal-oxide, metal and conducting metal oxide lamination are formed.
8. the transparent display panel as described in claim 1-3 is arbitrary, it is characterised in that described luminescent layer is
Organic luminous layer or quantum dot light emitting layer.
9. a preparation method for transparent display panel, comprises the following steps:
Thering is provided a TFT substrate with tft array, above described tft array, borehole, formation connect
Hole；
Make translucent half reflection electrode on the substrate, and described translucent half reflection electrode is by described
Connecting hole is connected with described tft array；
Described translucent half reflection electrode is sequentially depositing luminescent layer and transparency electrode；
Described transparency electrode makes light removing layer.
10. a preparation method for transparent display panel, comprises the following steps:
One TFT substrate with tft array is provided；
Make light removing layer on the substrate, borehole, formation connecting hole above described tft array；
Described smooth removing layer deposits transparency electrode, and described transparency electrode passes through described connecting hole with described
Tft array is connected；
Described transparency electrode is sequentially depositing luminescent layer and translucent half reflection electrode.
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| CN107681040A (en) * | 2017-10-14 | 2018-02-09 | 施伟强 | Display panel and constructional device |
| CN107703689A (en) * | 2017-09-18 | 2018-02-16 | 上海天马微电子有限公司 | Transparent display panel and display device |
| CN110277423A (en) * | 2019-06-28 | 2019-09-24 | 京东方科技集团股份有限公司 | A method for manufacturing a display panel, as well as a display panel and a display device |
| CN110767832A (en) * | 2018-12-29 | 2020-02-07 | 云谷（固安）科技有限公司 | Display panel, display panel preparation method, display screen and display terminal |
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| CN107703689A (en) * | 2017-09-18 | 2018-02-16 | 上海天马微电子有限公司 | Transparent display panel and display device |
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| WO2021233384A1 (en) * | 2020-05-20 | 2021-11-25 | 京东方科技集团股份有限公司 | Transparent display device, simulation method, and manufacturing method |
| US12250843B2 (en) | 2020-05-20 | 2025-03-11 | Boe Technology Group Co., Ltd. | Transparent display device, simulation method, and manufacturing method |
| WO2021244246A1 (en) * | 2020-06-04 | 2021-12-09 | 京东方科技集团股份有限公司 | Display substrate and manufacturing method therefor, and display panel |
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Application publication date: 20161012 |