CN108231825A - A kind of display screen and mobile terminal - Google Patents
A kind of display screen and mobile terminal Download PDFInfo
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- CN108231825A CN108231825A CN201611230845.5A CN201611230845A CN108231825A CN 108231825 A CN108231825 A CN 108231825A CN 201611230845 A CN201611230845 A CN 201611230845A CN 108231825 A CN108231825 A CN 108231825A
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- display screen
- layer
- electrode layer
- framework
- flexible electrode
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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
- H10K59/88—Dummy elements, i.e. elements having non-functional features
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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
-
- 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
- H10K59/124—Insulating layers formed between TFT elements and OLED elements
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present invention provides a kind of display screen and mobile terminal, which includes flexible base board, the first flexible electrode layer being deposited on the flexible base board；The elastic insulated dielectric layer being deposited in first flexible electrode layer is deposited on the second flexible electrode layer of the elastic insulated dielectric layer；Further include the luminescence display layer being arranged in second flexible electrode layer；Wherein, first flexible electrode layer, elastic insulated dielectric layer and the second flexible electrode layer form pressure-induced capacitance.In the above-described example, luminescence display layer and pressure-induced capacitance are laminated to be formed on the same substrate, and pressure-induced capacitance is directly formed on substrate by the way of deposition when making, without connection can be realized using adhesive linkage, when being applied on mobile terminal, it reduces multiple bending and the situation that substrate is detached from pressure-induced capacitance occurs, improve the stability of entire display screen.
Description
Technical field
This application involves to display screen technology field more particularly to a kind of display screen and mobile terminal.
Background technology
Mobile terminal such as mobile phone has flexible folder function, is the leading-edge products design neck that Vehicles Collected from Market is fallen over each other
Domain.The switching of display physical size can be realized by being bent mobile phone, met cruel dazzle based on bending mobile phone and developed design, realize
Some arrange splendid user experience for no touch formula page turning reading, web page browsing, game operation etc., so as to promote the city of mobile phone products
Field competitiveness.
In order to monitor and export the number of bends of flexible mobile terminal and bending radius, typically pacify in shaft
Sensing equipment is filled, the relationship of rotation and bending radius based on shaft obtains the curved of terminal device by the turn signal of shaft
Bent parameter.This general method can obtain accurate bending parameters, but since the sensing equipment of itself occupies certain space,
Limit the optimization design of complete machine structure.Pressure sensitive layer can be attached on flexible display screen, be pressed by another method
The variable of power and the correspondence of bending radius.
As shown in Figure 1, Fig. 1 shows the set-up mode of pressure inductor in the prior art, pressure inductor is attached to
The lower surface (1 is display module, and 2 be center, and 3 be pressure inductor) of display module, electrode and metal center in pressure sensitive
Gap be capacitance dielectric layer, when display module is pressurized, the gap of pressure sensitive electrode and metal center reduces, and capacitance is sent out
Changing can thus obtain the variation of pressure by the variation of capacitance.
The shortcomings that prior art：Pressure sensitive and display module are two independent devices, and intermediate demand has adhesive linkage, whole
Body thickness is thicker, when this technical solution is applied to flexible terminal, with the increase of bending angle and number, adhesive linkage
It is easily stripped, and the increase of thickness limits the promotion of bending ability.
Invention content
The embodiment of the present application provides a kind of display screen and mobile terminal, to improve display screen pressure sensing in bending
Device follows effect, and then improves detection result of the detection mobile terminal in bending.
The embodiment of the present application provides a kind of display screen, which includes flexible base board, is deposited on the flexible base board
On the first flexible electrode layer；The elastic insulated dielectric layer being deposited in first flexible electrode layer, is deposited on the elasticity
Second flexible electrode layer of insulating medium layer；Further include the luminescence display layer being arranged in second flexible electrode layer；Wherein,
First flexible electrode layer, elastic insulated dielectric layer and the second flexible electrode layer form pressure-induced capacitance.
In the above-described example, luminescence display layer and pressure-induced capacitance are laminated to be formed on the same substrate, and are adopted when making
Pressure-induced capacitance is directly formed on substrate with the mode of deposition, without connection can be realized using adhesive linkage, is being applied to
When on mobile terminal, reduce multiple bending and the situation that substrate is detached from pressure-induced capacitance occur, improve the steady of entire display screen
It is qualitative.
In a specific embodiment, it is provided between the luminescence display layer and second flexible electrode layer slow
Rush layer.Stressed effect of the display screen in bending is improved by the buffer layer of setting.
In a specific embodiment, the buffer layer includes the silicon nitride layer and silicon oxide layer that are laminated.With good
Good buffering effect.
In a specific embodiment, the luminescence display layer includes driving circuit and connects with the driving circuit
The Organic Light Emitting Diode connect.Specifically, the luminescence display layer include comprising driving circuit, Organic Light Emitting Diode (OLED) and
Thin-film package, wherein driving circuit (Thin-Film Transistor, TFT) material is p-type low temperature polycrystalline silicon (Low
Temperature Poly-Silicon, LTPS), N-type LTPS or indium gallium zinc oxide (Indium Gallium Zinc
Oxide, IGZO) in it is a kind of；OLED is made of red, green and blue pixel；Thin-film package is by inorganic layer (SiNxOx) and contains
Silicon organic matter layer forms.
In a specific embodiment, the flexible base board is glass substrate or plastic base.
In a specific embodiment, the elastic insulated dielectric layer makes for pressure-sensitive elastomeric material
Dielectric layer.
In a specific embodiment, the pressure-sensitive elastomeric material includes：Dimethyl silicone polymer gathers
Urethane elastomer or silicon rubber.
In a specific embodiment, first flexible electrode layer and the second flexible electrode layer are indium oxide
The electrode layer that tin, zinc oxide, nano silver wire make.
In specific make, the thickness of the flexible base board is between 10-50um.
The embodiment of the present application additionally provides a kind of mobile terminal, which includes the first framework, more than second framework
Any one of them display screen is stated, wherein, it is hinged between first framework and the second framework by shaft, and described aobvious
Display screen is arranged in the center that first framework and the second framework surround.
In a specific embodiment, the processing chip in the mobile terminal, for according to first framework
And when being bent between the second framework by shaft, the electric capacitance change of pressure-induced capacitance judges described first in the display screen
Framework relative to the second framework bending angle.
In a specific embodiment, the processing chip be additionally operable to be more than in the angle of the mobile terminal bending
During setting value, processing chip performs the control operation of setting.
Description of the drawings
Fig. 1 be in the prior art be that be device structure diagram；
Fig. 2 is the sectional view of display screen provided by the embodiments of the present application；
Fig. 3 is mobile terminal structure schematic diagram provided in an embodiment of the present invention；
Fig. 4 is the outer bending schematic diagram of mobile terminal provided in an embodiment of the present invention；
Fig. 5 is the outer bending schematic diagram of display screen provided in an embodiment of the present invention；
Fig. 6 is mobile terminal bending angle schematic diagram provided in an embodiment of the present invention；
Fig. 7 is bending schematic diagram in mobile terminal provided in an embodiment of the present invention；
Fig. 8 is bending schematic diagram in display screen provided in an embodiment of the present invention.
Reference numeral：
1- display module 2- center 3- pressure inductors
The elastic insulated dielectric layers of 10- flexible base boards 20- the first flexible electrode layer 30-
40- the second flexible electrode layer 50- buffer layer 60- luminescence display layers
100- display screen 200- centers 201- the first frame the second frames of 202-
300- shafts
Specific embodiment
The application is described below in conjunction with attached drawing.
As shown in Fig. 2, the structure Fig. 2 shows display screen provided in an embodiment of the present invention.
An embodiment of the present invention provides a kind of display screen, which includes flexible base board 10, is deposited on flexible base board 10
On the first flexible electrode layer 20；The elastic insulated dielectric layer 30 being deposited in the first flexible electrode layer 20 is deposited on elastic exhausted
Second flexible electrode layer 40 of edge dielectric layer 30；Further include the luminescence display layer 60 being arranged in the second flexible electrode layer 40；Its
In, the first flexible electrode layer 20,30 and second flexible electrode layer 40 of elastic insulated dielectric layer form pressure-induced capacitance.
With continued reference to Fig. 2, display screen provided in this embodiment is flexible flexible display screen, which is integrated with capacitance
Formula pressure inductor (pressure-induced capacitance), capacitive pressure inductor is by the first flexible electrode layer 20,30 and of elastic insulated dielectric layer
Second flexible electrode layer 40 forms, and the first flexible electrode layer 20,30 and second flexible electrode layer 40 of elastic insulated dielectric layer according to
It is secondary to be deposited on flexible base board 10, as an optional scheme, the buffer layer 50 on capacitive pressure inductor, then
Luminescence display layer 60 is prepared on buffer layer 50, which is active driving Organic Light Emitting Diode (Active
Matrix Organic Light-emitting Diodes, AMOLED), i.e., in the technical solution of the application, use will be shown
Show that module and capacitive pressure inductor are prepared in same flexible base board 10 jointly, so that display screen is in bending, it is electric
Without departing from and then improving the stability of entire display screen and applying between appearance formula pressure inductor and display module
To the accuracy of terminal bend angle measurement when on to mobile terminal.
Display screen provided in this embodiment is described in detail with reference to specific structure, with continued reference to Fig. 2, sheet
The substrate that the flexible base board 10 that embodiment provides makes for ultrathin bendable glass or plastic material, such as polyimides
(Polyimide, PI), it should of course be understood that be substrate provided in this embodiment can also use it is any other have flexibility
Can material make, in a specific preparation scheme, the thickness of the flexible base board 10 is 10-50um, as 10um, 20um,
The thickness arbitrarily between 10-50um such as 30um, 40um, 50um.
Condenser type provided in this embodiment pressure inductor includes two electrode layers, respectively the first flexible electrode layer 20 and the
Two flexible electrode layers 40, in specific prepare, the first flexible electrode layer 20 and the second flexible electrode layer 40 all can be indium oxides
Tin (Indium Tin Oxide, ITO), zinc oxide, nano silver wire, metal grill or conducting polymer (PEDOT:The materials such as PSS)
Expect the electrode layer prepared, use that manufacturing cost is low, the good and flexible gold of electric conductivity as the optional scheme material
Belong to grid or PEDOT:PSS electrodes.
Pressure-sensitive elastomer is used for the elastic insulated dielectric layer 30 in capacitive pressure inductor, such as：Poly- two
Methylsiloxane (Polydimethylsiloxane, PDMS), polyurethane elastomer (Thermoplastic
Polyurethanes, TPU) or the materials such as silicon rubber prepare.
The silicon nitride layer and silicon oxide layer that buffer layer 50 is laminated have good buffering effect.
Comprising driving circuit, Organic Light Emitting Diode (OLED) and thin-film encapsulation layer in AMOLED in the application, wherein
Thin film transistor (TFT) (Thin-Film Transistor, TFT) material is p-type low temperature polycrystalline silicon (Low Temperature Poly-
Silicon, LTPS), it is a kind of in N-type LTPS or indium gallium zinc oxide (Indium Gallium Zinc Oxide, IGZO)；
OLED is made of red, green and blue pixel；Thin-film package is made of inorganic layer (SiNxOx) and siliceous organic matter layer.
In order to facilitate display screen provided in this embodiment is understood, illustrated with reference to preparation method.
Embodiment 1
In the present embodiment, it is carried out for sensing integrated flexible display screen based on the capacitive pressure of p-type LTPS TFT
Explanation.
First, on the glass substrate, in 400 DEG C or so formation PI films of high temperature, thickness is about for the coating of flexiplast PI liquid
For 20-40um；
Then, by there is free Mask to prepare metal grill or ITO on PI, thickness is about 100-200nm, as capacitance
The lower electrode of formula pressure sensitive, coating elastomeric (such as PDMS) solution, dries solvent for 200 DEG C or so in high temperature on the bottom electrode
It is dry, PDMS film dielectric layer is formed, then preparation method same with lower electrode prepares top electrode again；
Finally, SiNx and SiOx being deposited with CVD modes in pressure sensitive top electrode and forming buffer layer 50, thickness is about
20um, deposition organic/inorganic is built up thin in 50 p-type LTPS arrays prepared above of buffer layer and OLED device, OLED device
Film, the encapsulated layer as AMOLED.
In the present embodiment, capacitive pressure sensing is integrated in flexible display screen, shares same flexible substrates, it is intermediate
Without adhered layer, be conducive to the promotion being thinned with bending ability of the thickness of display module.
Embodiment 2
In the present embodiment, using the integrated flexible display screen of capacitive pressure sensing based on N-shaped LTPS or IGZO TFT as
Example illustrates.
First, on the glass substrate, in 400 DEG C or so formation PI films of high temperature, thickness is about for the coating of flexiplast PI liquid
For 20-40um；
Then, by there is free Mask to prepare metal grill or ITO on PI, thickness is about 100-200nm, as capacitance
The lower electrode of formula pressure sensitive, coating elastomeric (such as PDMS) solution, dries solvent for 200 DEG C or so in high temperature on the bottom electrode
It is dry, PDMS film dielectric layer is formed, then preparation method same with lower electrode prepares top electrode again；
Finally, SiNx and SiOx being deposited with CVD modes in pressure sensitive top electrode and forming buffer layer 50, thickness is about
20um, deposition organic/inorganic is folded in 50 N-shaped LTPS prepared above of buffer layer or IGZO arrays and OLED device, OLED device
Into film, the encapsulated layer as AMOLED.
In this example it is shown that the material of driving TFT is N-shaped LTPS or IGZO, capacitive pressure sensing collection is increased
Into the material use selectivity of Flexible Displays module.
By above-mentioned specific embodiment 1 and embodiment 2 as can be seen that display screen provided in this embodiment improves capacitance
Bonding strength between formula pressure sensor and display module is improved in bending, is taken off between display module and condenser type pressure sensor
From situation, and connection can be completed without adhesive linkage in the two, reduces the thickness of entire display screen.
As shown in figure 3, the present embodiment additionally provides a kind of mobile terminal, which includes the first framework 201, second
Framework 202 with the display screen 100 of any of the above-described, wherein, cut with scissors between the first framework 201 and second framework 202 by shaft 300
It connects, and display screen 100 is arranged in the center 200 that the first framework 201 and second framework 202 surround.
Specifically, the Main physical component of mobile terminal disclosed in the present application includes integrated capacitive pressure inductor
Display screen 100, shaft 300, center 200, battery, processing chip and mainboard.The center 200 of mobile terminal includes two to box
The first framework 201 and second framework 202 of U-shaped, wherein, by 300 turns of shaft between the first framework 201 and second framework 202
Dynamic to connect and surround center 200, display screen 100 is arranged in the center 200.When in use, terminal is realized by shaft 300
Bending, the then display screen 100 for being placed in center 200 are and then bent, the processing chip in mobile terminal, for according to the first framework
When being bent between 201 and second framework 202 by shaft 300, the electric capacitance change of pressure-induced capacitance judges first in display screen 100
Framework 201 relative to 202 bending of second framework angle.Specifically, the capacitance change signal that bending generates is by mainboard
The signal processing of processing chip, processing chip judge mobile whole according to the electric capacitance change of the pressure-induced capacitance when mobile terminal is bent
Hold the angle of bending.And the processing chip is additionally operable to when the angle of mobile terminal bending is more than setting value, and processing chip is held
The control operation of row setting.And feed back to related application on display screen 100 again, battery is the confession to display screen 100 and mainboard
Power supply.
As shown in Figures 4 and 5, Fig. 4 shows a kind of bending situation of mobile terminal, and Fig. 5 gives corresponding condenser type
Variation of the pressure inductor in bending, as shown in figure 4, the electricity between the first flexible electrode layer 20 and the second flexible electrode layer 40
Press it is constant, when curved screens, positioned at 100 edge of display screen elastic insulated dielectric layer 30 thickness for d1, be bent region
The thickness d 2 (be bent outwardly and compressed) of elastic insulated dielectric layer 30, the variation of thickness are decided by the variation (θ) of bending angle,
Middle θ is the axis of 300 end face of shaft and the angle (such as Fig. 6) of center 200.The variation (C) of capacitance is related to the thickness of dielectric layer,
Corresponding bending angle is obtained according to capacitance values；Specifically,
D=f (θ)
C=ε A/d=ε A/f (θ)
The bending of mobile terminal is may determine that by the thickness of elastic insulated dielectric layer 30 it can be seen from above-mentioned formula
Angle.
However, it is to be understood that mobile terminal provided in this embodiment was bent outwards in addition to above-mentioned display screen 100
Outside designing scheme, the bending inwardly of display screen 100 shown in Fig. 7 can also be used, at this point, as shown in figure 8, Fig. 8 shows elasticity
The bending sketch map of insulating medium layer 30, the thickness d 4 (curving inwardly) of the elastic insulated dielectric layer 30 by being bent region, can be with
Calculate the bending angle of mobile terminal.
In the above-described example, processing chip is additionally operable to when the angle of mobile terminal bending is more than setting value, processing chip
Perform the control operation of setting.Specifically, the bending in display screen 100 causes the variation of elastic insulated 30 thickness of dielectric layer, production
The variation of raw capacitance signal, processing chip can be bent the variation of angle, and curved according to this according to the variation of capacitance signal
The corresponding operational order of bent angle completes web page browsing, reads some row applications such as page turning, game operation, picture scaling.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (11)
1. a kind of display screen, which is characterized in that including flexible base board, the first flexible electrode being deposited on the flexible base board
Layer；The elastic insulated dielectric layer being deposited in first flexible electrode layer is deposited on the second of the elastic insulated dielectric layer
Flexible electrode layer；Further include the luminescence display layer being arranged in second flexible electrode layer；Wherein, first flexible electrode
Layer, elastic insulated dielectric layer and the second flexible electrode layer form pressure-induced capacitance.
2. display screen as described in claim 1, which is characterized in that the luminescence display layer and second flexible electrode layer it
Between be provided with buffer layer.
3. display screen as claimed in claim 2, which is characterized in that the buffer layer includes the silicon nitride layer and silica that are laminated
Layer.
4. display screen as described in claim 1, which is characterized in that the luminescence display layer include driving circuit and with it is described
The Organic Light Emitting Diode of driving circuit connection.
5. display screen as described in claim 1, which is characterized in that the flexible base board is glass substrate or plastic base.
6. display screen as described in claim 1, which is characterized in that the elastic insulated dielectric layer is pressure-sensitive elastomer
The dielectric layer that material makes.
7. display screen as claimed in claim 6, which is characterized in that the pressure-sensitive elastomeric material includes：Poly- diformazan
Radical siloxane, polyurethane elastomer or silicon rubber.
8. display screen as described in claim 1, which is characterized in that first flexible electrode layer and the second flexible electrode layer are equal
The electrode layer made for tin indium oxide, zinc oxide, nano silver wire.
9. display screen as described in claim 1, which is characterized in that the thickness of the flexible base board is between 10-50um.
10. a kind of mobile terminal, which is characterized in that including the first framework, second framework and such as any one of claim 1~9
The display screen, wherein, it is hinged between first framework and the second framework by shaft, and the display screen is set
In the center surrounded in first framework and the second framework.
11. mobile terminal as claimed in claim 10, which is characterized in that the processing chip in the mobile terminal, for root
During according to being bent between first framework and the second framework by shaft, the capacitance quantitative change of pressure-induced capacitance in the display screen
Change judges angle of first framework relative to the second framework bending.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016111488658 | 2016-12-13 | ||
| CN201611148865 | 2016-12-13 |
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| Publication Number | Publication Date |
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| CN108231825A true CN108231825A (en) | 2018-06-29 |
| CN108231825B CN108231825B (en) | 2020-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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|---|---|---|---|---|
| US6212057B1 (en) * | 1998-12-22 | 2001-04-03 | Matsushita Electric Industrial Co., Ltd. | Flexible thin film capacitor having an adhesive film |
| CN203014919U (en) * | 2013-01-24 | 2013-06-19 | 广东欧珀移动通信有限公司 | Foldable double-screen cell phone |
| CN105653162A (en) * | 2014-11-13 | 2016-06-08 | 昆山工研院新型平板显示技术中心有限公司 | Flexible display device operation control method |
| CN205334427U (en) * | 2015-12-31 | 2016-06-22 | 华勤通讯技术有限公司 | Mobile terminal and pressure -sensitive device thereof |
| CN106024839A (en) * | 2016-07-12 | 2016-10-12 | 武汉华星光电技术有限公司 | Foldable OLED display |
| CN205721724U (en) * | 2016-06-03 | 2016-11-23 | 厦门天马微电子有限公司 | Touch-control display panel |
-
2016
- 2016-12-26 CN CN201611230845.5A patent/CN108231825B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6212057B1 (en) * | 1998-12-22 | 2001-04-03 | Matsushita Electric Industrial Co., Ltd. | Flexible thin film capacitor having an adhesive film |
| CN203014919U (en) * | 2013-01-24 | 2013-06-19 | 广东欧珀移动通信有限公司 | Foldable double-screen cell phone |
| CN105653162A (en) * | 2014-11-13 | 2016-06-08 | 昆山工研院新型平板显示技术中心有限公司 | Flexible display device operation control method |
| CN205334427U (en) * | 2015-12-31 | 2016-06-22 | 华勤通讯技术有限公司 | Mobile terminal and pressure -sensitive device thereof |
| CN205721724U (en) * | 2016-06-03 | 2016-11-23 | 厦门天马微电子有限公司 | Touch-control display panel |
| CN106024839A (en) * | 2016-07-12 | 2016-10-12 | 武汉华星光电技术有限公司 | Foldable OLED display |
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