CN110335870B - Method and device for preparing planarization layer, display screen and terminal - Google Patents
Method and device for preparing planarization layer, display screen and terminal Download PDFInfo
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- CN110335870B CN110335870B CN201910386216.9A CN201910386216A CN110335870B CN 110335870 B CN110335870 B CN 110335870B CN 201910386216 A CN201910386216 A CN 201910386216A CN 110335870 B CN110335870 B CN 110335870B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1248—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
- H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body
- H01L27/1214—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
- H01L27/1259—Multistep manufacturing methods
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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
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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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
- H10K59/40—OLEDs integrated with touch screens
Abstract
A method and a device for preparing a planarization layer, a display screen and a terminal comprise the following steps: determining a compensation angle for performing color cast compensation on the bending region based on the slope of the bending region; calculating to obtain the thickness of the flattening layer of the bending region according to the determined compensation angle; preparing a planarization layer according to the thickness of the planarization layer of the bending area obtained through calculation; wherein, the thickness of the planarization layer of the bending region is greater than that of the planarization layer of the normal region. The embodiment of the invention improves the color cast problem caused by the bending area of the display screen and improves the product yield of the display screen.
Description
Technical Field
The present disclosure relates to, but not limited to, touch screen technologies, and more particularly, to a method and an apparatus for preparing a planarization layer, a display screen and a terminal.
Background
Organic Light Emitting Displays (OLEDs) are one of the hotspots in the current display screen research field, and various display manufacturers also invest a large amount of material resources and manpower in the production of Active Matrix Organic Light Emitting Diode (AMOLED) display screens; compared with a Thin Film Transistor Liquid Crystal Display (TFTLCD) in the related technology, the AMOLED has the advantages of higher reaction speed, higher contrast ratio, wider viewing angle, lower energy consumption and the like. With the development of OLED display technology, people do not meet 2D (industry standard of display screen) display screens, and 2.5D or even 3D display screens are required. Fig. 1(a) is a schematic view of a 2D display screen, fig. 1(b) is a schematic view of a 2.5D display screen, and fig. 1(c) is a schematic view of a 3D display screen, referring to fig. 1(a) -fig. 1(c), for a 2.5D or 3D display screen, a bending region is located at an edge of the display screen, and in a display process, since the bending region and a normal region (a flat region except the bending region) are located on different planes, when human eyes are at a certain viewing angle, the degree of attenuation of picture brightness of the bending region and the normal region is inconsistent, which may cause color cast in the bending region, and affect the display effect of the display screen. How to improve the color cast problem of the flexible display screen bending area, thereby improving the display effect of the display screen, is a technical problem to be solved urgently.
The light-emitting principle of the OLED is that under the action of voltage, carriers of the positive and negative electrodes are compounded to form excitons in the organic light-emitting layer to cause light emission, and because each film layer has a reflection effect, light can be reflected for multiple times between the film layers to generate a strong interference effect. The structure formed by the various layers is called a microcavity device, light viewed by human eyes is a combination of a spectrum (called Electroluminescence (EL) spectrum) emitted by the material itself (photoluminescence (PL) spectrum) and a spectrum (gain spectrum) emitted by reflected light (called EL spectrum), the PL spectrum is controlled by the material itself, and the gain spectrum is influenced by a plurality of factors, wherein the viewing angle viewed by human eyes is an important factor influencing the gain spectrum. When the viewing angle changes from a direction perpendicular to the screen (we refer to as a 0 ° viewing angle) to a direction parallel to the screen (referred to as a 90 ° viewing angle), the brightness of the display screen changes, and decreases as the viewing angle increases. The main reason why the color cast occurs in the bending area of the display screen is that the bending area has a certain radian, so that the bending area and other areas are not on the same plane, and when human eyes watch a picture on the screen at a certain visual angle, the brightness of the bending area is inconsistent with that of other areas, so that the color of the bending area is inconsistent with that of a normal area, namely, the color cast occurs. Taking a 0-degree visual angle as an example, fig. 2(a) is a schematic diagram of a relative position between a normal area of a screen and human eyes, and fig. 2(b) is a schematic diagram of a relative position between a screen bending area and human eyes, comparing fig. 2(a) and fig. 2(b), the emitted light of the normal area is consistent with the visual angle of the display screen, and the emitted light of the bending area has an included angle θ with the 0-degree visual angle of the display screen, and the light intensity of the part is lower than the brightness of the normal area due to the included angle, thereby causing color cast.
Fig. 3 is a partial schematic view of a related art OLED display panel, as shown in fig. 3, the OLED display panel includes: the device comprises a substrate 3-1, a thin film transistor layer 3-2, a planarization layer 3-3, a pixel definition layer 3-4 and a thin film packaging layer 3-5; the thin film packaging layer comprises three parts, namely a thin film packaging layer 1(TEP-1)3-5-1, a thin film packaging layer 2(TEP-2)3-5-2 and a thin film packaging layer 3(TEP-3)3-5-3, the thickness of a Planarization (PLN) layer in the substrate is in the range of 1-3 micrometers, and one of the main functions of the planarization layer is to enable the flatness of each layer above the planarization layer to be consistent. Related researches find that the problem of color shift can be improved to a certain extent by increasing the thickness of the planarization layer, and the mechanism is that the flatness of the metal anode can be improved by increasing the thickness, so that the upper layers are flatter and are easier to correct the color shift. However, the material of the planarization layer is Polyimide (PI), and when the planarization layer is thickened, bubbles may appear on the screen Integrated Circuit (IC) side, and the bubbles are difficult to remove in the process, which may cause a serious reduction in the yield of the display screen.
Disclosure of Invention
The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.
The embodiment of the invention provides a method and a device for preparing a planarization layer, a display screen and a terminal, which can solve the problem of color cast caused by a bending area of the display screen and improve the product yield of the display screen.
The embodiment of the invention provides a method for preparing a planarization layer, which comprises the following steps:
determining a compensation angle for performing color cast compensation on the bending region based on the slope of the bending region;
calculating to obtain the thickness of the flattening layer of the bending region according to the determined compensation angle;
preparing a planarization layer according to the thickness of the planarization layer of the bending area obtained through calculation;
wherein, the thickness of the planarization layer of the bending region is greater than that of the planarization layer of the normal region.
In an exemplary embodiment, the determining a compensation angle for compensating for color shift of the bending region includes:
and according to the slope of the bending region, determining the compensation angle for performing color cast compensation on the bending region in a simulation manner.
In an exemplary embodiment, the calculating to obtain the thickness of the bending region planarization layer includes:
determining the inclination angle of a planarization layer according to the determined compensation angle for performing color cast compensation on the bending region;
and calculating to obtain the thickness of the flattening layer of the bending area according to the determined inclination angle of the flattening layer.
In an exemplary embodiment, the preparing the planarization layer according to the calculated thickness of the bending region planarization layer includes:
determining exposure parameters of the mask plate according to the determined thickness of the planarization layer;
and preparing the flattening layer of the bending region according to the determined exposure parameters of the mask plate.
In another aspect, an embodiment of the present invention further provides an apparatus for preparing a planarization layer, including: the device comprises a determining unit, a calculating unit and a preparing unit; wherein the content of the first and second substances,
the determination unit is configured to: determining a compensation angle for performing color cast compensation on the bending region based on the slope of the bending region;
the calculation unit is configured to: calculating to obtain the thickness of the flattening layer of the bending region according to the determined compensation angle;
the preparation unit is configured to: preparing a planarization layer according to the thickness of the planarization layer of the bending area obtained through calculation;
wherein, the thickness of the planarization layer of the bending region is greater than that of the planarization layer of the normal region.
In an exemplary embodiment, the determining unit is configured to:
and according to the slope of the bending region, determining the compensation angle for performing color cast compensation on the bending region in a simulation manner.
In an exemplary embodiment, the computing unit is configured to:
determining the inclination angle of a planarization layer according to the determined compensation angle for performing color cast compensation on the bending region;
and determining the thickness of the flattening layer of the bending area according to the determined inclination angle of the flattening layer.
In an exemplary embodiment, the preparation unit is configured to:
determining exposure parameters of the mask plate according to the determined thickness of the planarization layer;
and preparing the flattening layer of the bending region according to the determined exposure parameters of the mask plate.
In another aspect, an embodiment of the present invention further provides a display screen, including: the thin film transistor layer and the pixel definition layer are arranged on the substrate, and the planarization layer prepared by the method for preparing the planarization layer is further arranged between the thin film transistor layer and the pixel definition layer.
On the other hand, the embodiment of the invention also provides a terminal, which comprises the display screen.
Compared with the related art, the technical scheme of the application comprises the following steps: determining a compensation angle for performing color cast compensation on the bending region based on the slope of the bending region; calculating to obtain the thickness of the flattening layer of the bending region according to the determined compensation angle; preparing a planarization layer according to the thickness of the planarization layer of the bending area obtained through calculation; wherein, the thickness of the planarization layer of the bending region is greater than that of the planarization layer of the normal region. The embodiment of the invention improves the color cast problem caused by the bending area of the display screen and improves the product yield of the display screen.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1(a) is a schematic view of a 2D display screen;
FIG. 1(b) is a schematic view of a 2.5D display screen;
FIG. 1(c) is a schematic diagram of a 3D display screen;
FIG. 2(a) is a diagram showing the relative positions of the normal area of the screen and the human eyes;
FIG. 2(b) is a schematic diagram of the relative positions of the screen bending region and the human eyes;
FIG. 3 is a partial schematic view of a related art OLED display screen;
FIG. 4 is a flow chart of a method of fabricating a planarization layer according to an embodiment of the present invention;
fig. 5 is a block diagram of an apparatus for forming a planarization layer according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Fig. 4 is a flowchart illustrating a method for fabricating a planarization layer according to an embodiment of the present invention, as shown in fig. 4, including:
step 401, determining a compensation angle for performing color cast compensation on a bending region based on the slope of the bending region;
in an exemplary embodiment, determining a compensation angle for color shift compensation of the inflection region includes:
and according to the slope of the bending region, determining the compensation angle for performing color cast compensation on the bending region in a simulation manner.
It should be noted that, the method for calculating the compensation angle through simulation in the embodiment of the present invention may include a simulation algorithm existing in the related art.
In an exemplary embodiment, before determining the compensation angle for color shift compensation, the method further includes:
calculating the slope of the bending region.
It should be noted that the method for calculating the slope of the bending region can be implemented by referring to the embodiments already known in the related art.
in one exemplary embodiment, calculating the thickness of the inflection region planarization layer includes:
calculating to obtain the inclination angle of the planarization layer according to the determined compensation angle;
and determining the thickness of the flattening layer of the bending area according to the determined inclination angle of the flattening layer.
It should be noted that, the tilt angle of the planarization layer can be calculated and obtained according to the compensation angle by referring to the relevant theory.
wherein, the thickness of the planarization layer of the bending region is greater than that of the planarization layer of the normal region.
In an exemplary embodiment, the preparing the planarization layer according to the calculated thickness of the bending region planarization layer includes:
determining exposure parameters of the mask plate according to the determined thickness of the planarization layer;
and preparing the flattening layer of the bending region according to the determined exposure parameters of the mask plate.
It should be noted that the inclination angle can be obtained by the height difference existing in different regions of the planarization layer; therefore, the thickness of the planarization layer at different positions of the bending region can be determined according to the inclination angle. The method of determining the exposure parameter according to the thickness of the planarization layer, and the method of preparing the planarization layer in the bending region after determining the exposure parameter may be implemented with reference to the embodiments already known in the related art.
In the embodiment of the invention, in order to obtain the planarization layers with different thicknesses in different areas, the light transmittance of different areas of a PLN Mask (Mask) needs to be designed, and the planarization layers with different thicknesses are obtained through different exposure rates of the different areas.
Compared with the related art, the technical scheme of the application comprises the following steps: determining a compensation angle for performing color cast compensation on the bending region based on the slope of the bending region; calculating to obtain the thickness of the flattening and flattening layer of the bending area according to the determined compensation angle; preparing a planarization layer according to the thickness of the planarization layer of the bending area obtained through calculation; wherein, the thickness of the planarization layer of the bending region is greater than that of the planarization layer of the normal region. The embodiment of the invention improves the color cast problem caused by the bending area of the display screen and improves the product yield of the display screen.
The embodiment of the invention also provides a planarization layer, wherein the thickness of the planarization layer in the bending area is larger than that of the planarization layer in the normal area.
In one exemplary embodiment, the thickness of the planarization layer may be determined based on the following steps:
determining a compensation angle for performing color cast compensation on the bending region based on the slope of the bending region;
calculating to obtain the thickness of a flattening (PLN) layer of the bending region according to the determined compensation angle;
and preparing the planarization layer according to the calculated thickness of the planarization layer in the bending area.
In an exemplary embodiment, the preparing the planarization layer according to the calculated thickness of the bending region planarization layer includes:
determining exposure parameters of the mask plate according to the determined thickness of the planarization layer;
and preparing the flattening layer of the bending region according to the determined exposure parameters of the mask plate.
Fig. 5 is a block diagram illustrating an apparatus for preparing a planarization layer according to an embodiment of the present invention, as shown in fig. 5, including: the device comprises a determining unit 5-1, a calculating unit 5-2 and a preparing unit 5-3; wherein the content of the first and second substances,
the determination unit 5-1 is configured to: determining a compensation angle for performing color cast compensation on the bending region based on the slope of the bending region;
in an exemplary embodiment, the determining unit 5-1 is configured to:
and according to the slope of the bending region, determining the compensation angle for performing color cast compensation on the bending region in a simulation manner.
The calculation unit 5-2 is configured to: calculating to obtain the thickness of the flattening layer of the bending region according to the determined compensation angle;
in an exemplary embodiment, the computing unit 5-2 is configured to:
determining the inclination angle of the planarization layer according to the determined compensation angle;
and determining the thickness of the flattening layer of the bending area according to the determined inclination angle of the flattening layer.
The preparation unit 5-3 is configured to: preparing a planarization layer according to the thickness of the planarization layer of the bending area obtained through calculation;
wherein, the thickness of the planarization layer of the bending region is greater than that of the planarization layer of the normal region.
In an exemplary embodiment, the preparation unit 5-3 is configured to:
determining exposure parameters of the mask plate according to the determined thickness of the planarization layer;
and preparing the flattening layer of the bending region according to the determined exposure parameters of the mask plate.
The embodiment of the present invention further provides a display screen, which includes a substrate, a thin film transistor layer, a pixel definition layer, and a thin film encapsulation layer, and further includes: a planarization layer prepared as described above.
The embodiment of the invention also provides a terminal which comprises the display screen.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by a program instructing associated hardware (e.g., a processor) to perform the steps, and the program may be stored in a computer readable storage medium, such as a read only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in hardware, for example, by an integrated circuit to implement its corresponding function, or in software, for example, by a processor executing a program/instruction stored in a memory to implement its corresponding function. The present invention is not limited to any specific form of combination of hardware and software.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A method of forming a planarization layer, comprising:
determining a compensation angle for performing color cast compensation on the bending region based on the slope of the bending region;
calculating to obtain the thickness of the flattening layer of the bending region according to the determined compensation angle;
preparing a planarization layer according to the thickness of the planarization layer of the bending area obtained through calculation;
wherein, the thickness of the planarization layer of the bending region is greater than that of the planarization layer of the normal region.
2. The method of claim 1, wherein determining a compensation angle for color shift compensation of the inflection region comprises:
and according to the slope of the bending region, determining the compensation angle for performing color cast compensation on the bending region in a simulation manner.
3. The method of claim 1, wherein the calculating to obtain the thickness of the inflection region planarization layer comprises:
determining the inclination angle of a planarization layer according to the determined compensation angle for performing color cast compensation on the bending region;
and calculating to obtain the thickness of the flattening layer of the bending area according to the determined inclination angle of the flattening layer.
4. The method according to any one of claims 1 to 3, wherein the preparing the planarization layer according to the calculated thickness of the planarization layer in the bending region comprises:
determining exposure parameters of the mask plate according to the determined thickness of the planarization layer;
and preparing the flattening layer of the bending region according to the determined exposure parameters of the mask plate.
5. An apparatus for preparing a planarization layer, comprising: the device comprises a determining unit, a calculating unit and a preparing unit; wherein the content of the first and second substances,
the determination unit is configured to: determining a compensation angle for performing color cast compensation on the bending region based on the slope of the bending region;
the calculation unit is configured to: calculating to obtain the thickness of the flattening layer of the bending region according to the determined compensation angle;
the preparation unit is configured to: preparing a planarization layer according to the thickness of the planarization layer of the bending area obtained through calculation;
wherein, the thickness of the planarization layer of the bending region is greater than that of the planarization layer of the normal region.
6. The apparatus of claim 5, wherein the determining unit is configured to:
and according to the slope of the bending region, determining the compensation angle for performing color cast compensation on the bending region in a simulation manner.
7. The device of claim 5, wherein the computing unit is configured to:
determining the inclination angle of a planarization layer according to the determined compensation angle for performing color cast compensation on the bending region;
and calculating to obtain the thickness of the flattening layer of the bending area according to the determined inclination angle of the flattening layer.
8. The apparatus according to claim 6 or 7, wherein the preparation unit is configured to:
determining exposure parameters of the mask plate according to the determined thickness of the planarization layer;
and preparing the flattening layer of the bending region according to the determined exposure parameters of the mask plate.
9. A display screen, comprising: substrate, thin-film transistor layer, pixel define layer and thin-film encapsulation layer, its characterized in that still includes between thin-film transistor layer and the pixel define the layer: a planarization layer produced by the method of producing a planarization layer as claimed in any one of claims 1 to 4.
10. A terminal characterized by comprising a display screen according to claim 9.
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| CN107393468A (en) * | 2017-08-24 | 2017-11-24 | 京东方科技集团股份有限公司 | The color misregistration correction method and color cast correction device of a kind of display panel |
| CN108461041A (en) * | 2018-02-02 | 2018-08-28 | 云谷（固安）科技有限公司 | A kind of display device, the colour cast method of adjustment of display device and the manufacturing method of display device |
| CN108649134A (en) * | 2018-04-24 | 2018-10-12 | 武汉华星光电半导体显示技术有限公司 | A kind of OLED screen curtain and its manufacturing method |
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| CN107393468A (en) * | 2017-08-24 | 2017-11-24 | 京东方科技集团股份有限公司 | The color misregistration correction method and color cast correction device of a kind of display panel |
| CN108461041A (en) * | 2018-02-02 | 2018-08-28 | 云谷（固安）科技有限公司 | A kind of display device, the colour cast method of adjustment of display device and the manufacturing method of display device |
| CN108649134A (en) * | 2018-04-24 | 2018-10-12 | 武汉华星光电半导体显示技术有限公司 | A kind of OLED screen curtain and its manufacturing method |
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