CN106206981B - A kind of bottom emitting flexible display and its manufacture method - Google Patents
A kind of bottom emitting flexible display and its manufacture method Download PDFInfo
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- CN106206981B CN106206981B CN201610595026.4A CN201610595026A CN106206981B CN 106206981 B CN106206981 B CN 106206981B CN 201610595026 A CN201610595026 A CN 201610595026A CN 106206981 B CN106206981 B CN 106206981B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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Abstract
The present invention relates to a kind of bottom emitting flexible display and its manufacture method, the touch-control structure provided for bottom emitting OLED display designs, particularly in the manufacturing process of display, the manufacture of touch control electrode is integrated in the manufacturing process of flexible base board, technique is simple, integrated level is high, can effectively it reduce using film layer and binding number, so as to reduce the integral thickness of product so that display is thinner, flexible more preferable, bending resistance is stronger.
Description
Technical field
The present invention relates to display field, and in particular to a kind of bottom emitting flexible display and its manufacture method.
Background technology
Organic luminescent device (OLED) is to excite organic material luminous using the Carrier recombination injected after applied voltage
Device, has self-luminous, high efficiency, low-voltage, response is fast, visual angle is wide, can be made in many advantages, such as flexible base board, can make
Display or illuminating device, by the concern of society.
In many display devices, it is desirable to which touch screen function is attached in display.Existing OLED
Top emitting and bottom emitting OLED display can be divided into according to light direction difference.At present, touch-control design is directed to bottom emitting OLED
Display it is few, such as touch controllable function can be realized by plug-in touch control unit, but the preparation method of this structure is most
Complex process, integrated level is low, and can increase the integral thickness of display device.
The content of the invention
In order to solve the above technical problems, one aspect of the present invention provides a kind of bottom emitting flexible display, it includes：One is soft
Property substrate, the flexible base board have positioned at light direction side first surface and positioned at light direction opposite side second
Surface；With an Organic Light Emitting Diode unit, the Organic Light Emitting Diode unit is formed at the second surface side；It is described
Bottom emitting flexible display also includes a touch control unit；The touch control unit includes the first touch control electrode and second touch control electrode；
The second touch control electrode is formed at the second surface side of the flexible base board, and positioned at the second surface with it is described organic
Between light emitting diode；Or the second touch control electrode is formed at the first surface side of the flexible base board；It is described
First touch control electrode is located at the light direction side of the flexible base board, and positioned at the light direction of the second touch control electrode
Side, and be oppositely disposed with the second touch control electrode；The light direction side of first touch control electrode is formed with first
Protection film layer.
Another aspect of the present invention provides the manufacture method of above-mentioned bottom emitting flexible display, and the manufacture method includes three
Individual process；Wherein, first process is that patterning forms first touch control electrode in first protection film layer；Second
Process includes the step of next coming in order are carried out：Step 1) uses a rigid substrates, and a leafing type is deposited on the rigid substrates
Layer；Step 2) makes the second touch control electrode, the flexible base board and the organic light emission successively on the release layer
Diode；Or make the flexible base board, the second touch control electrode and described successively on the release layer
Organic Light Emitting Diode unit；Step 3) carries out laser irradiation to the back side of the rigid substrates, make the release layer broken with
Peel off the rigid substrates；3rd process is to paste the semi-finished product of first process and second process acquisition
Close.
Further aspect of the present invention provides a kind of electronic equipment, wherein, the electronic equipment includes bottom emitting described above
Flexible display, or the electronic equipment include the bottom emitting flexible display using manufacture method described above acquisition.
The invention provides the design of the touch-control structure for bottom emitting OLED display, the particularly manufacture in display
Cheng Zhong, the manufacture of touch control electrode is integrated in the manufacturing process of flexible base board, technique is simple, and integrated level is high, can effectively subtract
Less using film layer and binding number, so as to reduce the integral thickness of product so that display is thinner, flexible more preferable, bending resistance
It is stronger.
Brief description of the drawings
Fig. 1 is the cross section structure diagram of the bottom emitting flexible display of embodiment 1；
Fig. 2 is the overlooking the structure diagram of the first touch control electrode of the display of embodiment 1；
Fig. 3 is the overlooking the structure diagram of the second touch control electrode of the display of embodiment 1；
Fig. 4 to Fig. 9 is that the structure of the intermediate products obtained in the manufacturing process of the bottom emitting flexible display of embodiment 1 is shown
It is intended to.
Embodiment
Below with reference to embodiment shown in the drawings, the present invention will be described in detail.But these embodiments are simultaneously
The present invention is not limited, structure that one of ordinary skill in the art is made according to these embodiments, method or functionally
Conversion is all contained in protection scope of the present invention.
Example embodiment is described more fully with referring now to accompanying drawing.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, these embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical is attached in figure
Icon note represents same or similar structure, thus will omit repetition thereof.
Described feature, structure or characteristic can be incorporated in one or more embodiments in any suitable manner
In.In the following description, there is provided many details fully understand so as to provide to embodiments of the present invention.However,
One of ordinary skill in the art would recognize that without one or more in specific detail, or using other methods, constituent element, material
Material etc., can also put into practice technical scheme.In some cases, be not shown in detail or describe known features, material or
Person's operation is fuzzy of the invention to avoid.
Specifically described herein " be formed at/be arranged at/... on (it) " it should be understood to that include directly contacting " forms
In/be arranged at/... on (it) " and be not directly contacted with " it is formed at/be arranged at/... on (it) ".
The accompanying drawing of the present invention is only used for illustrating relative position relation and electrical connection, and the thickness at some positions, which employs, to be overstated
For the plotting mode shown in order to understand, the thickness in accompanying drawing does not represent the proportionate relationship of actual thickness.
It is a kind of bottom emitting flexible display of the embodiment of the present invention 1 as shown in Figure 1, it mainly includes：Flexible base board
100th, Organic Light Emitting Diode unit 200 and touch control unit.
The flexible display of the present embodiment is bottom emitting type, and flexible base board 100 has positioned at light direction side (as schemed
Direction in 1 shown in arrow) first surface (lower surface of the flexible base board 100 i.e. shown in Fig. 1) and positioned at light direction
The second surface (upper surface of the flexible base board 100 i.e. shown in Fig. 1) of opposite side.
Flexible base board 100 can be the flexible base board of PI or PET materials.In the present embodiment, flexible base board 100 uses PI
Material.
Organic Light Emitting Diode unit 200, also referred to as " display unit " or " display element ", it is formed at flexible base board 100
Upper surface side.
Touch control unit includes the first touch control electrode 301 and second touch control electrode 302；
Second touch control electrode 302 is formed at second surface (upper surface) side of flexible base board 100, and is located at second surface
Between Organic Light Emitting Diode unit 200；Or second touch control electrode 302 be formed at flexible base board 100 first surface (under
Surface) side；First touch control electrode 301 is located at the light direction side of flexible base board 100 and second touch control electrode 302, and with
Second touch control electrode 302 is oppositely disposed；
The light direction side (downside) of first touch control electrode 301 is formed with the first protection film layer 303.
In the present embodiment, touch control unit is located at the lower surface side of flexible base board 100, specifically, second touch control electrode
302 be located at flexible base board 100 lower surface side, the first touch control electrode 301 be located at the downside of second touch control electrode 302 and both
It is oppositely disposed, the downside of the first touch control electrode 301 is formed with the first protection film layer 303.
In the present embodiment, touch control unit is included on the lower surface of flexible base board 100, along light direction side successively layer
The second barrier layer 305 for setting foldedly, second touch control electrode 302, the first barrier layer 304, the first touch control electrode 301 and first
Protection film layer 303.
Wherein, the second barrier layer 305 is arranged between flexible base board 100 and second touch control electrode 302, the second barrier layer
305 be isolation material, and with the function of isolation water oxygen.
First barrier layer 304 is arranged between the first touch control electrode 301 and second touch control electrode 302, the first barrier layer 304
For isolation material, and with the function of isolation water oxygen.In the present embodiment, the first touch control electrode 301 and second touch control electrode 302
Between can be positioned apart from by one layer of first barrier layer 304 (insulating medium layer), so as to formed the touch-control of touch control unit electricity
Hold structure.
The first above-mentioned barrier layer 304 and the second barrier layer 305 can use the materials such as silica, silicon nitride.
First diaphragm 303 is located at the lower surface of the first touch control electrode 301.In the present embodiment, the first diaphragm 303 is
The undermost diaphragm of whole bottom emitting flexible display.
First diaphragm 303 can use the conventional film that blocks water, such as in one layer of resistance of coating such as on PET or COP base materials
The film that blocks water that water coating (silica or silicon nitride coating) is formed.
In the present embodiment, the first touch control electrode 301 has the touch-control binding part extended outside the first barrier layer 304
301b, for corresponding IC connections.
Touch control unit can be mutual capacitance type touch control unit, for example, the first touch control electrode 301 and second touch control electrode 302
In one of them be driving electrodes, another is sensing electrode.In the present embodiment, the first touch control electrode 301 is sensing electricity
Pole, as shown in Fig. 2 including multiple strip sub-electrode 301x be arrangeding in parallel, arranged along the line direction of display；Second touch-control electricity
Pole 302 is driving electrodes, as shown in figure 3, it includes multiple strip sub-electrode 302y be arrangeding in parallel, along the column direction of display
Arrangement.The sub-electrode of sensing electrode 301 is connected to control unit (not shown), driving electricity by touch-control sensing electrode cabling
The sub-electrode of pole 302 passes through touch-control driving electrodes cabling to control unit (not shown), the strip of the first touch control electrode 301
The sub-electrode 301x and strip sub-electrode 302y of second touch control electrode 302, forms the situation for being mutually perpendicular to distribution.Control unit to
Driving electrodes 302 input touch-control drive signal, when extraneous finger touches, the sub-electrode of driving electrodes 302 and sensing electrode 301
The electric capacity of each infall can change, and this electricity in sensing electrode 301 is received by touch-control sensing electrode cabling
Hold the signal of change, so that it is determined that touch location.
In the present embodiment, Organic Light Emitting Diode unit 200 is included in the second surface (upper surface) of flexible base board 100
It is the upper, TFT layer 201 that is set with stacking gradually along light direction opposite side, anode layer 202, organic luminescence function layer 203, anti-
Penetrate cathode layer 204, the protection film layer 206 of thin-film encapsulation layer 205 and second.
Wherein, between flexible base board 100 and TFT layer 201, it is isolation material on the 3rd barrier layer 101, and with every
The function of exhausted water oxygen, the materials such as silica, silicon nitride can be used.
TFT devices are provided with TFT layer 201, and one layer of flatness layer is covered with TFT devices.Organic Light Emitting Diode list
" ray structure " in member 200 is formed on flatness layer.
" ray structure " is " ray structure " of bottom emitting type, and wherein anode layer 202 is printing opacity (transparent or semitransparent)
Electrode layer, cathode layer 204 are reflection electrode layer；From the injected holes of anode layer 202 and from cathode layer injected electrons organic
Compound generation exciton is so as to luminous in light emitting functional layer 203.In general, pixel limiting structure is also included in TFT layer 201, is had
The light that machine light emitting functional layer 203 is sent outwards is launched from the open area of pixel limiting structure.
The top (in other words, the top of " ray structure ") of reflective cathode layer 204 is provided with thin-film encapsulation layer 205.It is general next
Say, thin-film encapsulation layer 205 is connected with flexible base board 100, is formed a sealing space and is realized encapsulation.
The top of thin-film encapsulation layer 205 is provided with the second protection film layer 206.In the present embodiment, the second diaphragm 206 is whole
The diaphragm of the superiors of individual bottom emitting flexible display.Second diaphragm 206, with as the first diaphragm 303, it can use
The conventional film that blocks water.
Therefore, the touch-control structure design for bottom emitting OLED display is present embodiments provided, i.e., by bottom emitting OLED
Display unit integrates with touch control unit, on the one hand, has filled up the prior art (touch-control only shown suitable for top emitting
Structure technology) blank；On the other hand, simple in construction, integrated level is high, can effectively reduce using film layer, so as to reduce product
Integral thickness so that display is thinner, flexible more preferable, and bending resistance is stronger.
Manufacture method on the bottom emitting flexible display of above-described embodiment 1 includes following three processes.
Wherein, as shown in Figures 2 and 4, first process is that patterning forms the first touch-control electricity in the first protection film layer 303
Pole 301.
Second process includes the step of next coming in order are carried out：
Step 1) uses a rigid substrates 400, deposits one layer of release layer 410 on the rigid substrate；Referring to Fig. 5.
Step 2) makes second touch control electrode 302, flexible base board 100 and organic light emission two successively on release layer 410
Pole pipe unit 200.
Specifically in the present embodiment, step 2) includes the step of next coming in order are carried out：
Step 2a), the first barrier layer 304, then deposition and pattern on the first barrier layer 304 are deposited on release layer 410
Change forms second touch control electrode 302, the schematic top plan view of second touch control electrode 302 as shown in Figure 3；Then in second touch control electrode
The second barrier layer 305 is deposited on 302, as shown in Figure 6；
Step 2b), flexible base board 100 is formed in a manner of being coated with and solidify on the second barrier layer 305, then in flexible base
The 3rd barrier layer 101 is deposited on plate 100；As shown in Figure 7；
Step 2c), as shown in figure 8, making the TFT layer of Organic Light Emitting Diode unit 200 successively on flexible base board 100
201st, anode layer 202, organic luminescence function layer 203, reflective cathode layer 204, the protection film layer of thin-film encapsulation layer 205 and second
206。
Step 3) carries out laser irradiation to the back side of rigid substrates 400, makes release layer 410 broken to peel off rigid substrates
400, as shown in Figure 9.In Fig. 9, direction shown in arrow is laser direction of illumination.
Wherein, the energy of laser irradiation is the energy rank that release layer can be caused broken；In the present embodiment, release layer
410 can use silicon nitride material, and the energy of laser irradiation can be 200~350mj/cm2。
Above-mentioned first process and second process, both complete independentlies, in no particular order order.
3rd process is to be bonded the semi-finished product that first process and second process obtain, so that the first touch-control
Electrode 301 is located at the downside of second touch control electrode 302 and both are relatively positioned apart from；Finished product after fitting is as shown in Figure 1.
The manufacture method of the bottom emitting flexible display of above-mentioned the present embodiment, the manufacture of first and second touch control electrode is integrated
In the manufacturing process of flexible base board, technique is simple, and integrated level is high, can effectively reduce using film layer and binding number, so as to
Reduce the integral thickness of product so that display is thinner, and flexible more preferable, bending resistance is stronger.
Carry out the first process again alternatively, it is also possible to first carry out the second process, then carry out the 3rd process, then send out on earth
Penetrate flexible display.Comprise the following steps that.
First carry out the second process：Step 1) uses a rigid substrates 400, deposits one layer of release layer 410 on the rigid substrate；
Referring to Fig. 5.
Step 2) makes second touch control electrode 302, flexible base board 100 and organic light emission two successively on release layer 410
Pole pipe unit 200.
Specifically in the present embodiment, step 2) includes the step of next coming in order are carried out：
Step 2a), the first barrier layer 304, then deposition and pattern on the first barrier layer 304 are deposited on release layer 410
Change forms second touch control electrode 302, the second barrier layer 305 is then deposited in second touch control electrode 302, as shown in Figure 6；
Step 2b), flexible base board 100 is formed in a manner of being coated with and solidify on the second barrier layer 305, then in flexible base
The 3rd barrier layer 101 is deposited on plate 100；As shown in Figure 7；
Step 2c), as shown in figure 8, making the TFT layer of Organic Light Emitting Diode unit 200 successively on flexible base board 100
201st, anode layer 202, organic luminescence function layer 203, reflective cathode layer 204, the protection film layer of thin-film encapsulation layer 205 and second
206。
Then, the first process is carried out：Patterning forms the first touch control electrode 301 in the first protection film layer 303.
The 3rd process is carried out again：The semi-finished product that first process and second process obtain are bonded.
As shown in figure 1, the first touch control electrode 301 has the touch-control binding part extended outside the first barrier layer 304
301b, the manufacture method also include Four processes：By the touch-control binding part 301b and organic light emission two of the first touch control electrode
Pole pipe unit 200 is bound be connected to corresponding IC respectively., can be by touch-control part and luminescence display using the structures and methods
It is partially integrated in together, finally realizes and once bind simultaneously, technique is simpler.
In another alternate embodiment of the present invention, second touch control electrode 302 can be formed at the of flexible base board 100
Two surfaces (upper surface) side, and between second surface and Organic Light Emitting Diode unit 200；First touch control electrode 301
It is formed at first surface (lower surface) side of flexible base board 100；Consequently, it is possible to the first touch control electrode 301 and the second touch-control electricity
By being opened including at least the dielectric spacing structure including flexible base board 100 between pole 302, so as to form touch control capacitance knot
Structure.In the manufacture method of the alternate embodiment product, first process is the same as embodiment 1；Step 1) during second
With embodiment 1；Step 2) during second is adjusted accordingly, and can make flexible base board successively on release layer 410
100th, second touch control electrode 302 and Organic Light Emitting Diode unit 200 (specifically, release layer 410 and flexible base board 100
Between deposited a barrier layer；A barrier layer is deposited between flexible base board 100 and second touch control electrode 302；Second touch-control electricity
A barrier layer is deposited between pole 302 and Organic Light Emitting Diode unit 200)；It is remaining, the step 3) during second,
And the 3rd process and Four processes it is all identical with embodiment 1.
The bottom emitting flexible display of the present embodiment, can apply in the electronic equipments such as mobile phone, pad, television set.
It should be appreciated that although the present specification is described in terms of embodiments, not each embodiment only includes one
Individual independent technical scheme, this narrating mode of specification is only that those skilled in the art will should say for clarity
For bright book as an entirety, the technical scheme in each embodiment may also be suitably combined to form those skilled in the art can
With the other embodiment of understanding.
Those listed above is a series of to be described in detail only for feasibility embodiment of the invention specifically
Bright, they simultaneously are not used to limit the scope of the invention, all equivalent implementations made without departing from skill spirit of the present invention
Or change should be included in the scope of the protection.
Claims (11)
1. a kind of bottom emitting flexible display, it includes：
One flexible base board, the flexible base board have positioned at light direction side first surface with positioned at light direction opposite one
The second surface of side；With
One Organic Light Emitting Diode unit, the Organic Light Emitting Diode unit are formed at the second surface side；
It is characterized in that：
The bottom emitting flexible display also includes a touch control unit；
The touch control unit includes the first touch control electrode and second touch control electrode；
The second touch control electrode is formed at the second surface side of the flexible base board, and positioned at the second surface with it is described
Between Organic Light Emitting Diode unit；Or the second touch control electrode is formed at the first surface side of the flexible base board；
First touch control electrode is located at the light direction side of the flexible base board, and positioned at the second touch control electrode
Light direction side, and be oppositely disposed with the second touch control electrode；
The light direction side of first touch control electrode is formed with the first protection film layer；
The Organic Light Emitting Diode unit is included on the second surface of the flexible base board, along the light direction opposite one
TFT layer, anode layer, organic luminescence function layer, reflective cathode layer, thin-film encapsulation layer and the second guarantor that side is set with stacking gradually
Cuticular layer.
2. bottom emitting flexible display as claimed in claim 1, it is characterised in that：
The touch control unit includes the second barrier layer, the second touch-control electricity set with stacking gradually along the light direction side
Pole, the first barrier layer, the first touch control electrode and the first protection film layer.
3. bottom emitting flexible display as claimed in claim 2, it is characterised in that：
First touch control electrode have extend outside first barrier layer touch-control binding part, for it is corresponding
IC connections.
4. bottom emitting flexible display as claimed in claim 1, it is characterised in that：
First touch control electrode and second touch control electrode can carry out mutual capacitance type touch control.
5. bottom emitting flexible display as claimed in claim 2, it is characterised in that：
First barrier layer and second barrier layer are adopted and are made from an insulative material.
A kind of 6. manufacture method of bottom emitting flexible display as claimed in claim 1, it is characterised in that：
The manufacture method includes three processes；Wherein,
First process is that patterning forms first touch control electrode in first protection film layer；
Second process includes the step of next coming in order are carried out：
Step 1) uses a rigid substrates, and one layer of release layer is deposited on the rigid substrates；
Step 2) makes the second touch control electrode, the flexible base board and the organic light emission successively on the release layer
Diode；Or make the flexible base board, the second touch control electrode and described successively on the release layer
Organic Light Emitting Diode unit；
Step 3) carries out laser irradiation to the back side of the rigid substrates, makes the release layer broken to peel off the rigid base
Plate；
3rd process is to be bonded the semi-finished product of first process and second process acquisition.
7. manufacture method as claimed in claim 6, it is characterised in that：
The step 2) of second process includes the step of next coming in order are carried out：
Step 2a) the first barrier layer is deposited on the release layer, then be deposited and patterned to be formed on first barrier layer
The second touch control electrode, the second barrier layer is then deposited in the second touch control electrode；
Step 2b) flexible base board is formed in a manner of being coated with and solidify on second barrier layer, in the flexible base
The 3rd barrier layer is deposited on plate；
Step 2c) on the 3rd barrier layer make the Organic Light Emitting Diode unit.
8. manufacture method as claimed in claim 7, it is characterised in that：
In the step 2c) in, TFT layer, anode layer, organic luminescence function layer, anti-is sequentially formed on the 3rd barrier layer
Cathode layer and thin-film encapsulation layer are penetrated, then the second protection film layer is bonded in thin-film encapsulation layer.
9. manufacture method as claimed in claim 7, it is characterised in that：
First touch control electrode has the touch-control binding part extended outside first barrier layer,
The manufacture method also includes Four processes：By the touch-control binding part of first touch control electrode and the organic light emission
Diode is tied to same IC.
10. the manufacture method as described in any one in the claim 6 to 9, it is characterised in that：
The release layer uses silicon nitride material, and the energy of the laser irradiation is 200~350mj/cm2。
11. a kind of electronic equipment, it is characterised in that：The electronic equipment is included as described in any one in claims 1 to 3
Bottom emitting flexible display, or the electronic equipment are included using the manufacture as described in any one in claim 6 to 10
The bottom emitting flexible display that method obtains.
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| CN106775134A (en) * | 2017-03-31 | 2017-05-31 | 京东方科技集团股份有限公司 | Flexible base board, touch display substrate and preparation method thereof, touch control display apparatus |
| CN107742628A (en) * | 2017-09-12 | 2018-02-27 | 奕瑞影像科技（太仓）有限公司 | Flexible scintillation screen, radiation image sensor and preparation method thereof |
| CN108107060A (en) * | 2017-11-30 | 2018-06-01 | 上海奕瑞光电子科技股份有限公司 | Flat panel detector based on fexible film encapsulation and preparation method thereof |
| CN110021234B (en) * | 2018-01-08 | 2022-03-08 | 上海和辉光电股份有限公司 | Array substrate, manufacturing method thereof and flexible display panel |
| CN110032918B (en) * | 2018-01-12 | 2022-01-11 | 京东方科技集团股份有限公司 | Fingerprint identification device, manufacturing method thereof and electronic device |
| CN108281470B (en) * | 2018-01-29 | 2021-08-27 | 上海天马有机发光显示技术有限公司 | Array substrate, electroluminescent display panel and display device |
| CN110890380B (en) * | 2018-08-20 | 2023-07-07 | 瀚宇彩晶股份有限公司 | Method for manufacturing flexible substrate |
| CN109411524B (en) * | 2018-12-04 | 2021-08-24 | 武汉华星光电半导体显示技术有限公司 | Display module and display device |
| CN110690258A (en) * | 2019-09-02 | 2020-01-14 | 武汉华星光电半导体显示技术有限公司 | Display structure |
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