CN111584561A - Touch screen and electronic device - Google Patents
Touch screen and electronic device Download PDFInfo
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- CN111584561A CN111584561A CN202010381585.1A CN202010381585A CN111584561A CN 111584561 A CN111584561 A CN 111584561A CN 202010381585 A CN202010381585 A CN 202010381585A CN 111584561 A CN111584561 A CN 111584561A
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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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
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a touch screen and an electronic device, wherein the touch screen comprises: a drive substrate; an anode layer disposed on the driving substrate, the anode layer including an anode; a pixel defining layer disposed on the anode, the pixel defining layer including a plurality of opening regions; an organic light emitting layer located in the opening region; the cathode layer is arranged on the organic light emitting layer and the pixel defining layer and is multiplexed into a first touch layer; the first touch layer comprises a plurality of first touch electrodes, and the first touch electrodes comprise a plurality of first touch units; the color film layer is arranged on the cathode layer, and a second touch layer is embedded in the color film layer; the second touch layer comprises a plurality of second touch electrodes, the second touch electrodes comprise a plurality of second touch units, and the first touch units and the second touch units are arranged in a crossed mode. The touch screen and the electronic device can reduce the thickness of the touch screen.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a touch screen and an electronic device.
[ background of the invention ]
The existing touch screen includes a display panel and a touch layer, a polarizer is usually disposed at the topmost part of the display panel, and the display panel usually adopts an organic light emitting diode display panel. Although the Polarizer (POL) can effectively reduce the reflection under strong light, it can lose nearly 58% of the light, thus increasing the burden of the organic light emitting diode, i.e. increasing the power consumption, and in addition, because the polarizer has a large thickness (nearly 100um) and is brittle, it cannot be used on a flexible display screen.
Subsequently, a technique of using a Color Filter (Color Filter) instead of the Polarizer (POL) has been developed, that is, a Color Filter is manufactured above the touch layer. The method can not only reduce the thickness of the functional layer from 100 mu m to less than 5 mu m, but also improve the light extraction rate from 42% to 60%, so that the method is considered to be one of key technologies for realizing the development of dynamic bending products.
However, the thickness of the color filter is large, which results in an increase in the thickness of the touch screen.
[ summary of the invention ]
The invention aims to provide a touch screen and an electronic device, which can improve the uniformity of light and the display effect.
To solve the above technical problem, the present invention provides a touch panel, which includes:
a drive substrate;
an anode layer disposed on the driving substrate; the anode layer comprises an anode;
a pixel defining layer disposed on the anode, the pixel defining layer including a plurality of opening regions;
an organic light emitting layer located in the opening region;
the cathode layer is arranged on the organic light emitting layer and the pixel defining layer and is multiplexed into a first touch layer; the first touch layer comprises a plurality of first touch electrodes, and the first touch electrodes comprise a plurality of first touch units;
the color film layer is arranged on the cathode layer, and a second touch layer is embedded in the color film layer; the second touch layer comprises a plurality of second touch electrodes, the second touch electrodes comprise a plurality of second touch units, and the first touch units and the second touch units are arranged in a crossed mode.
The invention further provides an electronic device which comprises the touch screen.
The invention relates to a touch screen and an electronic device, comprising a driving substrate; an anode layer disposed on the driving substrate, the anode layer including an anode; a pixel defining layer disposed on the anode, the pixel defining layer including a plurality of opening regions; an organic light emitting layer located in the opening region; the cathode layer is arranged on the organic light emitting layer and the pixel defining layer and is multiplexed into a first touch layer; the first touch layer comprises a plurality of first touch electrodes, and the first touch electrodes comprise a plurality of first touch units; the color film layer is arranged on the cathode layer, and a second touch layer is embedded in the color film layer; the second touch layer comprises a plurality of second touch electrodes, the second touch electrodes comprise a plurality of second touch units, and the first touch units and the second touch units are arranged in a crossed mode; the second touch layer is embedded in the color film layer, so that the thickness of the touch screen can be reduced.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a touch screen according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a touch screen according to another embodiment of the present invention;
FIG. 3 is a top view of a touch structure according to an embodiment of the invention;
FIG. 4 is a top view of the first touch layer in FIG. 3;
FIG. 5 is a top view of the second touch layer in FIG. 3;
FIG. 6 is a schematic structural diagram of a spacer according to the present invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
As shown in fig. 1 and fig. 2, the touch panel 100 of the present embodiment includes a driving substrate 40, an insulating layer 42, an anode layer 50, an organic light emitting layer 52, a cathode layer 47, an encapsulation layer 48, and a color film layer 60. In an embodiment, the touch screen 100 may further include a pixel definition layer 43.
The driving substrate 40 includes a flexible substrate, which may be polyimide, and a switch array layer. The switch array layer is arranged on the flexible substrate; the switch array layer may include a plurality of switching elements having a cross-sectional structure including a gate electrode, an active layer, and source and drain electrodes 41. The switching element is, for example, a thin film transistor.
The anode layer 50 includes an anode 51, and the anode 51 is connected to the drain 41. The number of anodes is not limited.
An organic light emitting layer 52 is provided on the anode 51. The organic light emitting layer may include a red organic light emitting layer, a green organic light emitting layer, and a blue organic light emitting layer.
With reference to fig. 3, a cathode layer 47 is disposed on the organic light emitting layer 52, and the cathode layer 47 is multiplexed as the first touch layer 11; the cathode layer 47 can be manufactured by a low temperature process, wherein the process temperature is less than 90 degrees.
An encapsulation layer 48 is disposed on the cathode layer 47; the cross-sectional structure of the encapsulation layer 48 includes an overlapping structure of inorganic layers and organic layers.
The color film layer 60 is disposed on the encapsulation layer 48, and the second touch layer 12 is embedded in the color film layer 60. In an embodiment, the color film layer 60 includes a plurality of black matrices 61 arranged at intervals and a plurality of color film color resistors 62, the color film color resistors 62 are arranged between two adjacent black matrices 61, and the color film color resistors 62 include a red color film, a green color film, and a blue color film. The color filter 62 corresponds to the organic light emitting layer 52 in position and also corresponds to the color thereof, for example, a red color filter corresponds to a red organic light emitting layer.
The second touch layer 12 is disposed on the black matrix 61, wherein the height of the color filter 62 is less than the height of the second touch layer 12. The black matrix 61 covers the second touch layer 12, that is, the black matrix 61 can completely shield the second touch layer 12, so that reflection of external environment light and reflection of light by the metal electrode can be reduced, and the display effect is improved. In order to further reduce the reflection of the external environment light and the reflection of the light by the metal electrode, the color filter 62 is abutted against the adjacent black matrix 61. It is understood that, in other embodiments, the color filter 62 and the adjacent black matrix 61 may be disposed at intervals. The height of the color filter color resistor 62 may be greater than or equal to the height of the black matrix 61.
In an embodiment, the touch panel 100 may further include a pixel defining layer 43, a hole injection layer 44, a hole transport layer 45, an electron injection layer 46, and a protective layer 53, which are sequentially disposed between the anode layer 50 and the cathode layer 47.
The pixel defining layer 43 includes a plurality of opening regions (not shown). The organic light emitting layer 52 is located in the opening region;
the protective layer 53 is disposed on the color film layer 60, and the material of the protective layer 53 may be a transparent photoresist material.
With reference to fig. 3 to fig. 5, in one embodiment, the first touch layer 11 includes a plurality of first touch electrodes 111, and the first touch electrodes 111 include a plurality of first touch units 21. The second touch layer 12 includes a plurality of second touch electrodes 121, the second touch electrodes 121 include a plurality of second touch units 23, and the first touch units 21 and the second touch units 23 are arranged in an intersecting manner. The material of the second touch electrode 20 may be a high transmittance conductive material such as Indium Tin Oxide (ITO), graphene, and AgNW.
In another embodiment, as shown in fig. 4, the first touch layer 11 includes a plurality of first touch electrodes 111 and a plurality of first idle rows 112. The first touch electrode 111 includes a plurality of first touch units 21 arranged along a first direction and connected to each other;
the first idle row 112 includes a plurality of first idle cells 22 arranged in a first direction; in one embodiment, a plurality of the first idle cells 22 in the first idle row 112 are connected to each other, and in another embodiment, two adjacent first idle cells 22 in the first idle row 112 are spaced apart from each other. In one embodiment, in order to further improve the uniformity of light, the first touch electrodes 111 and the first idle rows 112 are alternately disposed; of course, it can be understood that the first touch electrodes 111 and the first idle rows 112 may not be alternately disposed, for example, the first idle rows are disposed between two adjacent first touch electrodes 111. The first touch electrode 111 can be connected to the first electrode lead 20, the first touch electrode 111 is connected to the first electrode lead 20 through a switch element (not shown), and the first electrode lead 20 corresponding to the first touch electrode 111 is connected to the touch chip.
The first idle row 112 may also be connected to the first electrode lead 20, and the first electrode lead 20 corresponding to the first idle row 112 is not connected to the touch chip. The first idle row 112 may not be connected to the first electrode lead 20.
As shown in fig. 5, the second touch layer 12 includes a plurality of second touch electrodes 121 and a plurality of second idle rows 122. The second touch electrode 121 includes a plurality of second touch units 23 arranged along a second direction and connected to each other; the projection of the second touch unit 23 on a set plane intersects with the projection of the first touch unit 21 on the set plane. The setting plane is a plane formed by the first direction and the second direction, and in one embodiment, the setting plane is a horizontal plane. The first direction and the second direction are arranged crosswise, and preferably, the first direction is perpendicular to the second direction.
The second idle row 122 includes a plurality of second idle cells 24 arranged in a second direction; in one embodiment, the second idle cells 24 in the second idle row 122 are connected to each other, and in another embodiment, two adjacent second idle cells 24 in the second idle row 122 are spaced apart from each other. In one embodiment, in order to further improve the uniformity of light, the second touch electrodes 121 and the second idle rows 122 are alternately disposed; of course, it can be understood that the second touch electrodes and the second idle rows may not be alternately arranged, for example, the second idle rows are arranged between two adjacent second touch electrodes. The second touch electrode 121 can be connected to the second electrode lead 30, and the second electrode lead 30 corresponding to the second touch electrode 121 is connected to the touch chip. The second idle row 122 may also be connected to the second electrode lead 30, and the second electrode lead 30 corresponding to the second idle row 122 is not connected to the touch chip. The second idle row 122 may not be connected to the second electrode lead 30.
In one embodiment, in order to further improve the uniformity of the light, the position of the second touch unit 23 corresponds to the position of the first idle unit 22; the position of the first touch unit 21 corresponds to the position of the second idle unit 24.
The first idle units 22 are spaced from the adjacent first touch units 21, and the second idle units 24 are spaced from the adjacent second touch units 23.
In one embodiment, in order to further improve the uniformity of light and simplify the manufacturing process, the area of the first touch unit 21 is equal to the area of the first idle unit 22; the area of the second touch unit 23 is equal to the area of the second idle unit 24.
In one embodiment, in order to further improve the uniformity of light and simplify the manufacturing process, the shape of the first touch unit 21 is the same as that of the first idle unit 22; the shape of the second touch unit 23 is the same as the shape of the second idle unit 24. For example, in one embodiment, the shape of the first touch unit 21, the shape of the first idle unit 22, the shape of the second touch unit 23, and the shape of the second idle unit 24 are all diamond-shaped.
In one embodiment, in order to increase the aperture ratio, the material of the first touch layer 11 is a transparent conductive material, and the material of the second touch layer 12 is a metal material or a transparent conductive material, wherein the second idle cells 24 and the second touch units 23 may be in a grid shape.
It can be understood that the plurality of first touch units in the first touch electrode are not limited to be located in the same row, but may be located in different rows, and at this time, the connecting lines between the first touch electrodes are bent, and the first idle units, the second touch electrodes, and the second idle units are also similar thereto.
Because the first idle unit is manufactured in the first touch layer and the second idle unit is manufactured in the second touch layer, light rays in each area of the touch screen can pass through the film layers with the same number and thickness, the consistency of the thickness and the material of the film layers is kept, the uniformity of the light rays is improved, and the display effect is improved.
The touch screen 100 of the present invention includes a plurality of organic light emitting units, and the organic light emitting units are located in the grid of the second grid-shaped touch unit.
It is to be understood that the structure of the touch screen is not limited thereto.
In the specific working process of the touch screen: when the touch screen is in a display stage, the cathode layer has a first function, namely the cathode layer and the anode act together, so that the organic light-emitting unit is driven to emit light. For example, at this time, the switch element corresponding to the first touch electrode 111 is turned off.
When the touch screen is in the touch stage, the cathode layer 47 has a second function. That is, the cathode layer 47 serves as a first touch layer, thereby cooperating with the second touch electrode to detect a touch signal. For example, at this time, the switch element corresponding to the first touch electrode 111 is closed.
The patterning of the cathode layer 47 is specifically made by the following steps:
the cathode layer is prepared by using a Fine Metal Mask (FMM) instead of a conventional Common Mask (CMM) method, namely, when the cathode layer is patterned, the FMM is directly used for evaporation to realize patterning of the cathode layer, so that the accuracy of the cathode layer is ensured to meet the requirement.
The light resistance and the low-temperature photoresist can be coated on the cathode layer and then patterned, and in addition, a passivation layer or a protective layer can be arranged on the low-temperature photoresist, so that over-etching in the etching process is avoided, the organic light-emitting device is prevented from being damaged, and the patterning of the cathode layer is realized.
Before depositing the whole cathode layer, coating patterned stripping glue in a set area, after depositing cathode material, tearing off the stripping glue, and removing the cathode layer below the stripping glue to realize patterning of the cathode layer.
The patterning of the cathode is realized by improving the shape of the spacers, such as manufacturing inverted trapezoidal, regular trapezoidal and triangular spacers, and depositing the spacers on the spacers.
As shown in fig. 6, taking the spacer 70 on the pixel defining layer 43 and omitting other film layers for illustration, the height of the spacer 70 can be set relatively high, and the cross-sectional shape of the spacer 70 is isosceles triangle or isosceles trapezoid, so that the cathode material deposited cannot completely cover the entire spacer, so that the cathode layer is separated by the top of the spacer, and patterning of the cathode layer is achieved.
The height of the spacers 70 is set relatively high, the cross section of the spacers 70 is an inverted isosceles trapezoid, and since the spacers are wide at the top and narrow at the bottom, it is easier to separate the cathode layer 47 by the top of the spacers during deposition of the cathode material, thereby realizing patterning of the cathode layer.
The invention further provides an electronic device which comprises the touch screen. The electronic device can be a mobile phone, a tablet computer, a computer and other equipment.
The invention relates to a touch screen and an electronic device, comprising a driving substrate; an anode layer disposed on the driving substrate, the anode layer including an anode; a pixel defining layer disposed on the anode, the pixel defining layer including a plurality of opening regions; an organic light emitting layer located in the opening region; the cathode layer is arranged on the organic light emitting layer and the pixel defining layer and is multiplexed into a first touch layer; the first touch layer comprises a plurality of first touch electrodes, and the first touch electrodes comprise a plurality of first touch units; the color film layer is arranged on the cathode layer, and a second touch layer is embedded in the color film layer; the second touch layer comprises a plurality of second touch electrodes, the second touch electrodes comprise a plurality of second touch units, and the first touch units and the second touch units are arranged in a crossed mode; the second touch layer is embedded in the color film layer, so that the thickness of the touch screen can be reduced.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A touch screen, comprising:
a drive substrate;
an anode layer disposed on the driving substrate; the anode layer comprises an anode;
a pixel defining layer disposed on the anode, the pixel defining layer including a plurality of opening regions;
an organic light emitting layer located in the opening region;
the cathode layer is arranged on the organic light emitting layer and the pixel defining layer and is multiplexed into a first touch layer; the first touch layer comprises a plurality of first touch electrodes, and the first touch electrodes comprise a plurality of first touch units;
the color film layer is arranged on the cathode layer, and a second touch layer is embedded in the color film layer; the second touch layer comprises a plurality of second touch electrodes, the second touch electrodes comprise a plurality of second touch units, and the first touch units and the second touch units are arranged in a crossed mode.
2. Touch screen according to claim 1,
the color film layer comprises a plurality of black matrixes arranged at intervals; the second touch layer is arranged on the black matrix.
3. Touch screen according to claim 2, characterized in that
The black matrix covers the second touch unit.
4. The touch screen of claim 1, wherein the color film layer further comprises a plurality of color filter resists, the color filter resists correspond to the organic light emitting layer, and the color filter resists are smaller than the second touch layer.
5. Touch screen according to claim 4,
and the color resistance of the color film is abutted with the adjacent black matrix.
6. Touch screen according to claim 4,
the color film color resistor is arranged between two adjacent black matrixes, wherein the height of the color film color resistor is larger than or equal to that of the black matrixes.
7. Touch screen according to claim 1,
the first touch layer further comprises a first idle group, and the first idle group comprises a plurality of first idle units arranged along a first direction;
the second touch layer further comprises a second idle group, and the second idle group comprises a plurality of second idle units arranged along a second direction; the first direction and the second direction are arranged crosswise.
8. The touch structure of claim 7, wherein the touch pad is disposed on the substrate,
first touch units in the first touch electrodes are arranged along a first direction and are connected with each other; second touch units in the second touch electrodes are arranged along a second direction and are connected with each other;
the first touch control electrodes and the first idle groups are alternately arranged;
the second touch electrodes and the second idle groups are alternately arranged.
9. The touch screen of claim 1, further comprising an encapsulation layer between the cathode layer and the color film layer.
10. An electronic device, comprising the touch screen of any one of claims 1 to 9.
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| CN202010381585.1A CN111584561B (en) | 2020-05-08 | 2020-05-08 | Touch screen and electronic device |
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| CN202010381585.1A CN111584561B (en) | 2020-05-08 | 2020-05-08 | Touch screen and electronic device |
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| CN111584561B CN111584561B (en) | 2023-03-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112117313A (en) * | 2020-09-10 | 2020-12-22 | 武汉华星光电半导体显示技术有限公司 | Display screen and electronic equipment |
| CN112117312A (en) * | 2020-09-09 | 2020-12-22 | 武汉华星光电半导体显示技术有限公司 | Display screen and electronic equipment |
| CN112420958A (en) * | 2020-11-18 | 2021-02-26 | 合肥维信诺科技有限公司 | Display panel and preparation method thereof |
| CN112750962A (en) * | 2020-12-29 | 2021-05-04 | 湖北长江新型显示产业创新中心有限公司 | Display panel, manufacturing method thereof and display device |
| CN114267806A (en) * | 2021-12-15 | 2022-04-01 | 武汉华星光电半导体显示技术有限公司 | Display panel |
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