CN111261687A - Display panel, preparation method thereof and display device - Google Patents
Display panel, preparation method thereof and display device Download PDFInfo
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- CN111261687A CN111261687A CN202010080795.7A CN202010080795A CN111261687A CN 111261687 A CN111261687 A CN 111261687A CN 202010080795 A CN202010080795 A CN 202010080795A CN 111261687 A CN111261687 A CN 111261687A
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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
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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Abstract
The embodiment of the invention provides a display panel, a preparation method thereof and a display device, wherein the display panel comprises an organic light-emitting structure layer and a peep-proof module arranged on the light-emitting side of the organic light-emitting structure layer, the peep-proof module comprises a liquid crystal layer, a first electrode and a second electrode, the first electrode and the second electrode are used for driving the liquid crystal layer to deflect, and the first electrode and the second electrode are arranged on two opposite sides of the liquid crystal layer; a first voltage input by the first electrode and the second electrode is used for switching the liquid crystal layer between a non-peeping state and a peeping-preventing state; so as to realize the peep-proof function of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a preparation method thereof and a display device.
Background
With the development of network technology, more and more people carry out operations such as shopping or account transaction on the network, and in the process of the operations, operators often need to input personal information on display devices such as computers, mobile phones, automatic teller machines and automatic ticket dispensers, so that personal information is easily leaked. Therefore, the peep prevention performance of the display device is receiving more and more attention.
For a conventional Liquid Crystal Display (LCD for short), a peep-proof module is generally adopted, that is, a peep-proof film having a peep-proof function is integrated into a backlight structure to achieve peep-proof.
With the rapid development of display technology, the OLED (Organic Light Emitting Diode) as a self-Light Emitting technology has become a new trend in the display field due to its characteristics of being Light and thin, being applicable to flexible display, etc. The OLED is a self-luminous display technology, and the peep-proof module cannot be installed due to the fact that the OLED does not contain a backlight structure in self-luminous mode, and the peep-proof function is achieved.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide a display panel, a manufacturing method thereof, and a display device, so as to implement a peep-proof function of the display panel.
In order to solve the above technical problem, an embodiment of the present invention provides a display panel, including an organic light emitting structure layer and a privacy protection module disposed on a light emitting side of the organic light emitting structure layer, where the privacy protection module includes a liquid crystal layer, a first electrode and a second electrode for driving the liquid crystal layer to deflect, and the first electrode and the second electrode are disposed on opposite sides of the liquid crystal layer; the first voltage input by the first electrode and the second electrode is used for switching the liquid crystal layer between a non-peeping state and a peeping state.
Optionally, the first electrode is disposed on a side of the liquid crystal layer close to the organic light emitting structure layer, and the organic light emitting structure layer and the privacy protecting module share the first electrode.
Optionally, the organic light emitting structure layer includes a light emitting unit and a light emitting driving circuit, the light emitting unit is configured to emit display light, the light emitting driving circuit is connected to the light emitting unit and configured to control and drive the light emitting unit, and the light emitting unit and the peep-proof module share the first electrode.
Optionally, the light emitting unit includes a light emitting functional layer, and the first electrode and the third electrode disposed on opposite sides of the light emitting functional layer, where a second voltage input by the first electrode and the third electrode is used to enable the light emitting functional layer to emit display light.
Optionally, the first electrode includes a plurality of first electrode blocks that are arranged in the form of a matrix and are insulated from each other, and each first electrode block is connected with a first touch lead, the second electrode includes a plurality of second electrode blocks that are arranged in the form of a matrix and are insulated from each other, and every second electrode block all is connected with a second touch lead, the first electrode block with the second electrode block one-to-one.
Optionally, each first electrode block is connected to a first touch chip through the first touch lead, and each second electrode block is connected to a second touch chip through the second touch lead.
Optionally, the first touch lead and the second touch lead are arranged in a crossed manner.
Optionally, the peep-proof module further comprises a first substrate for disposing the organic light emitting structure layer and a second substrate opposite to the first substrate, and the peep-proof module is disposed between the organic light emitting structure layer and the second substrate.
Optionally, the package structure further includes a package structure disposed between the first substrate and the second substrate.
Optionally, the peep-proof module further comprises a support structure disposed between the first electrode and the second electrode.
In order to solve the above technical problem, an embodiment of the present invention further provides a display device, including the foregoing display panel.
In order to solve the above technical problem, an embodiment of the present invention further provides a method for manufacturing a display panel, including:
forming an organic light emitting structure layer;
and forming a peep-proof module on the light emitting side of the organic light emitting structure layer, wherein the peep-proof module comprises a liquid crystal layer, a first electrode and a second electrode, the first electrode and the second electrode are used for driving the liquid crystal layer to deflect, and first voltages input by the first electrode and the second electrode are used for switching the liquid crystal layer between a non-peep-proof state and a peep-proof state.
According to the display panel, the preparation method thereof and the display device provided by the embodiment of the invention, the peep-proof function of the display panel is realized through the peep-proof module, and the peep-proof module is arranged on the outer side of the organic light-emitting structure layer, so that the influence on the appearance of the display panel caused by the fact that the peep-proof module is arranged on the inner side of the organic light-emitting structure layer is avoided.
According to the display panel provided by the embodiment of the invention, the organic light-emitting structure layer and the peep-proof module share the first electrode, so that the organic light-emitting structure layer and the peep-proof module can be controlled through the first electrode.
In the display panel provided by the embodiment of the invention, the first electrodes and the second electrodes are arranged in a matrix form and are respectively connected with the first touch lead and the second touch lead, so that the first electrodes and the second electrodes have a touch function.
Of course, not all of the advantages described above need to be achieved at the same time in the practice of any one product or method of the invention. 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 embodiments 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. The shapes and sizes of the various elements in the drawings are not to scale and are merely intended to illustrate the invention.
FIG. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is a schematic view of a liquid crystal layer of a display panel according to a first embodiment of the present invention when a peep-proof module is not powered;
FIG. 4 is a schematic view of a liquid crystal layer of the display panel according to the first embodiment of the present invention when the privacy module is powered on;
FIG. 5 is a diagram of a first electrode in a display panel according to a first embodiment of the present invention;
FIG. 6 is a diagram of a second electrode in a display panel according to a first embodiment of the present invention;
fig. 7 is a schematic diagram of signals emitted from the first electrode block in the display panel according to the first embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention. 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.
In order to solve the problem that the conventional OLED display panel cannot achieve a peeping prevention function, the embodiment of the invention provides a display panel, which comprises an organic light emitting structure layer and a peeping prevention module arranged on a light emitting side of the organic light emitting structure layer, wherein the peeping prevention module comprises a liquid crystal layer, a first electrode and a second electrode, the first electrode and the second electrode are used for driving the liquid crystal layer to deflect, and the first electrode and the second electrode are arranged on two opposite sides of the liquid crystal layer; the first voltage input by the first electrode and the second electrode is used for switching the liquid crystal layer between a non-peeping state and a peeping state.
The technical solution of the embodiment of the present invention is explained in detail by the specific embodiment below.
First embodiment
FIG. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention; fig. 2 is a cross-sectional view taken at a-a in fig. 1. Fig. 1 and fig. 2 are schematic structural diagrams of an OLED (Organic Light Emitting Diode) display panel. As shown in fig. 1 and 2, the display panel includes an organic light emitting structure layer 10 and a privacy module 20 disposed on a light emitting side of the organic light emitting structure layer 10. The organic light emitting structure layer 10 is used for emitting display light, and the peep-proof module 20 is used for refracting the display light emitted by the organic light emitting structure layer 10 to realize the peep-proof function of the display panel. The peep-proof module 20 comprises a liquid crystal layer 201, a first electrode 202 and a second electrode 203 for driving the liquid crystal layer 201 to deflect, wherein the first electrode 202 and the second electrode 203 are arranged at two opposite sides of the liquid crystal layer 201; the first voltage input by the first electrode 202 and the second electrode 203 is used for switching the liquid crystal layer 201 between the non-peeping state and the peeping state.
The display panel of the embodiment realizes the peeping prevention function of the display panel through the peeping prevention module 20, and the peeping prevention module 20 is arranged at the outer side of the organic light emitting structure layer 10, so that the influence of the peeping prevention module 20 arranged at the inner side of the organic light emitting structure layer 10 on the beauty of the display panel is avoided.
FIG. 3 is a schematic view of a liquid crystal layer of a display panel according to a first embodiment of the present invention when a peep-proof module is not powered;
fig. 4 is a schematic view of a liquid crystal layer of the display panel according to the first embodiment of the invention when the privacy module is powered on. As shown in fig. 3 and 4, when the peep-proof module 20 is not powered on, the liquid crystal molecules in the liquid crystal layer 201 are disorderly arranged, and the liquid crystal molecules scatter light, at this time, the display light emitted from the organic light emitting structure layer is refracted by the liquid crystal molecules in the liquid crystal layer 201 to scatter, so that the visual viewing angle of the display panel is large, as shown in fig. 3. When a first voltage is inputted to the first electrode and the second electrode of the anti-peeping module 20 to drive the liquid crystal molecules in the liquid crystal layer 201 to deflect, so that the liquid crystal molecules are aligned, and the liquid crystal molecules in the liquid crystal layer 201 are in a vertical "standing" (i.e. the long axis of the liquid crystal molecules is vertical to the light-emitting side of the display panel) state, when the display light emitted from the organic light emitting structure layer passes through the privacy protection module 20, the vertical light a perpendicular to the display panel in the display light passes through the liquid crystal layer 201, the light b non-perpendicular to the display panel is refracted at the liquid crystal molecules, and is decomposed into vertical light b1 and horizontal light c1, the vertical light b1 passes through the liquid crystal layer 201, the horizontal light c1 is continuously changed by the refraction of the liquid crystal molecules, and is refracted into horizontal light c2 and vertical light b2, the vertical light b2 passes through the liquid crystal layer 201, therefore, the light b is transmitted vertically, the display panel can be seen in the vertical direction, and peeping is prevented in the left and right directions. In the actual control process, a peep-proof principle similar to a shutter can be adopted.
The first electrode and the second electrode in the display panel of this embodiment may also input a third voltage to drive liquid crystal molecules in the liquid crystal layer to deflect, so that the liquid crystal molecules are arranged at an inclined angle, when the organic light emitting structure layer emits display light and passes through the peep-proof module, light in the display light having the same inclination angle as the liquid crystal molecules passes through the liquid crystal layer, and light perpendicular to the display panel is refracted at the liquid crystal molecules until light having the same inclination angle as the liquid crystal molecules passes through the liquid crystal layer 201, thereby realizing the visibility of the display panel in the left-right direction and the peep-proof in the vertical direction.
As shown in fig. 1 and fig. 2, the first electrode 202 is disposed on a side of the liquid crystal layer 201 close to the organic light emitting structure layer 10, and the first electrode 202 is shared by the organic light emitting structure layer 10 and the privacy protection module 20, that is, the first electrode 202 serves as an electrode of both the organic light emitting structure layer 10 and the privacy protection module 20. Specifically, the organic light emitting structure layer 10 includes a light emitting unit 101 for emitting display light, and a light emitting driving circuit 102 connected to the light emitting unit 101 for controlling and driving the light emitting unit 101. The light emitting unit 101 includes a light emitting functional layer 1011, and a first electrode 202 and a third electrode 1012 disposed on opposite sides of the light emitting functional layer 1011, and a second voltage is input from the first electrode 202 and the third electrode 1012 for causing the light emitting functional layer 1011 to emit display light. The light emitting unit 101 and the peep-proof module 20 share the first electrode 202, and the first electrode 202 and the third electrode 1012 input the second voltage, so that the light emitting functional layer 1011 emits the display light, and the first electrode 202 and the second electrode 203 input the first voltage, so that the liquid crystal layer 201 is in the peep-proof state. The light-emitting driving circuit 102 includes a gate layer, a first insulating layer disposed on the gate layer, a source/drain layer disposed on the first insulating layer, a second insulating layer disposed on the source/drain layer, and an isolation layer disposed on the second insulating layer, wherein a via hole communicated with the source/drain layer is formed in the second insulating layer, a light-emitting unit 101 is disposed in the isolation layer, and a third electrode 1012 in the light-emitting unit 101 is connected to the source/drain layer through the via hole. The light-emitting functional layer 1011 includes a hole transport layer, an organic light-emitting layer, and an electron transport layer, which are stacked.
FIG. 5 is a diagram of a first electrode in a display panel according to a first embodiment of the present invention; FIG. 6 is a diagram of a second electrode in a display panel according to a first embodiment of the present invention. As shown in fig. 5 and 6, the first electrode 202 includes a plurality of first electrode blocks 2021 arranged in a matrix and insulated from each other, each first electrode block 2021 is connected with a first touch lead 30, the second electrode 203 includes a plurality of second electrode blocks 2031 arranged in a matrix and insulated from each other, each second electrode block 2031 is connected with a second touch lead 40, and the first electrode blocks 2021 and the second electrode blocks 2031 correspond to each other one by one, so that the first electrode 202 and the second electrode 203 have a touch function, and form touch electrodes, that is, the first electrode 202 serves as a touch driving electrode and the second electrode 203 serves as a touch sensing electrode. The first touch lead 30 and the second touch lead 40 are disposed in a peripheral area of the display panel, the first touch lead 30 is used as a touch driving lead, and the second touch lead 40 is used as a touch sensing lead. Each of the first electrode blocks 2021 is connected to the first touch chip 50 disposed in the peripheral region through the first touch lead 30, and each of the second electrode blocks 2031 is connected to the second touch chip 60 disposed in the peripheral region through the second touch lead 40.
In the embodiment, the first touch lead 30 and the second touch lead 40 are disposed to intersect. Preferably, the first touch lead 30 and the second touch lead 40 are perpendicular to each other.
Fig. 7 is a schematic diagram of signals emitted from the first electrode block in the display panel according to the first embodiment of the invention. As shown in fig. 5, 6 and 7, when the display panel performs touch control, the second electrode 203 senses the touch driving signal of the first electrode 202, and obtains a touch point (x, y) under the calculation of the touch chip, so as to perform related control actions. For example, the first electrode block 2021 adopts a transverse connection design of Tx 1-Txn, and the second electrode block 2031 adopts a vertical connection design of Ry 1-Ryn. When the corresponding points are contacted, for example, the first electrode block 2021 of Tx3 and the second electrode block 2031 of Ry4 are contacted, the signal of the first electrode block 2021 of Tx3 is transmitted to the second electrode block 2031 of Ry4 and is captured by the second touch lead 40, the touch sensing chip can calculate that the second electrode block 2031 of Ry4 receives the signal and calculates the position of the first electrode block 2021 of Tx3 according to the signal characteristics of the first electrode block 2021 of Tx3, thereby determining that the touch points are the contact points of Tx3 and Ry4, and thus realizing the touch function.
As shown in fig. 1 and fig. 2, the display panel of the embodiment further includes a first substrate 70 for disposing the organic light emitting structure layer 10 and a second substrate 80 opposite to the first substrate 70, and the privacy protecting module 20 is disposed between the organic light emitting structure layer 10 and the second substrate 80. The first substrate 70 and the second substrate 80 are both glass substrates. The first substrate 70 is provided with a first electrode 202 and a first touch chip 50. The second substrate 80 is provided with a third insulating layer, and the second electrode 203 and the second touch chip 60 are disposed on the third insulating layer.
As shown in fig. 1, the display panel further includes an encapsulation structure 90 disposed between the first substrate 70 and the second substrate 80.
As shown in fig. 2, the privacy module 20 further includes a support structure 100 disposed between the first electrode 202 and the second electrode 203.
Second embodiment
Based on the technical idea of the foregoing embodiment, an embodiment of the present invention further provides a display device, which includes the display panel described in the first embodiment. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
Third embodiment
Based on the technical idea of the foregoing embodiment, an embodiment of the present invention further provides a method for manufacturing a display panel, including:
forming an organic light emitting structure layer;
and forming a peep-proof module on the light emitting side of the organic light emitting structure layer, wherein the peep-proof module comprises a liquid crystal layer, a first electrode and a second electrode, the first electrode and the second electrode are used for driving the liquid crystal layer to deflect, and first voltages input by the first electrode and the second electrode are used for switching the liquid crystal layer between a non-peep-proof state and a peep-proof state.
In the description of the embodiments of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
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 (12)
1. A display panel is characterized by comprising an organic light emitting structure layer and a peep-proof module arranged on the light emitting side of the organic light emitting structure layer, wherein the peep-proof module comprises a liquid crystal layer, a first electrode and a second electrode, the first electrode and the second electrode are used for driving the liquid crystal layer to deflect, and the first electrode and the second electrode are arranged on two opposite sides of the liquid crystal layer; the first voltage input by the first electrode and the second electrode is used for switching the liquid crystal layer between a non-peeping state and a peeping state.
2. The display panel of claim 1, wherein the first electrode is disposed on a side of the liquid crystal layer close to the organic light emitting structure layer, and the first electrode is shared by the organic light emitting structure layer and the privacy protection module.
3. The display panel according to claim 2, wherein the organic light emitting structure layer comprises a light emitting unit and a light emitting driving circuit, the light emitting unit is configured to emit display light, the light emitting driving circuit is connected to the light emitting unit and configured to control and drive the light emitting unit, and the light emitting unit and the privacy protection module share the first electrode.
4. The display panel according to claim 3, wherein the light emitting unit includes a light emitting functional layer, and the first electrode and the third electrode are disposed on opposite sides of the light emitting functional layer, and a second voltage is input to the first electrode and the third electrode to cause the light emitting functional layer to emit display light.
5. The display panel according to claim 1, wherein the first electrodes include a plurality of first electrode blocks arranged in a matrix and insulated from each other, each of the first electrode blocks is connected with a first touch lead, the second electrodes include a plurality of second electrode blocks arranged in a matrix and insulated from each other, each of the second electrode blocks is connected with a second touch lead, and the first electrode blocks correspond to the second electrode blocks one to one.
6. The display panel according to claim 5, wherein each first electrode block is connected to a first touch chip through the first touch lead, and each second electrode block is connected to a second touch chip through the second touch lead.
7. The display panel according to claim 5, wherein the first touch lead and the second touch lead are arranged to intersect.
8. The display panel of claim 1, further comprising a first substrate for disposing the organic light emitting structure layer and a second substrate opposite to the first substrate, wherein the privacy module is disposed between the organic light emitting structure layer and the second substrate.
9. The display panel according to claim 8, further comprising an encapsulation structure disposed between the first substrate and the second substrate.
10. The display panel of claim 1, wherein the privacy module further comprises a support structure disposed between the first electrode and the second electrode.
11. A display device comprising the display panel according to any one of claims 1 to 10.
12. A method for manufacturing a display panel, comprising:
forming an organic light emitting structure layer;
and forming a peep-proof module on the light emitting side of the organic light emitting structure layer, wherein the peep-proof module comprises a liquid crystal layer, a first electrode and a second electrode, the first electrode and the second electrode are used for driving the liquid crystal layer to deflect, and first voltages input by the first electrode and the second electrode are used for switching the liquid crystal layer between a non-peep-proof state and a peep-proof state.
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| CN108363250A (en) * | 2018-03-22 | 2018-08-03 | 京东方科技集团股份有限公司 | A kind of display panel, display module, display device and its anti-peeping method |
| CN110032009A (en) * | 2018-08-29 | 2019-07-19 | 京东方科技集团股份有限公司 | Display panel, display device and anti-peeping method |
| CN110208992A (en) * | 2018-11-19 | 2019-09-06 | 京东方科技集团股份有限公司 | Display control unit and its control method, display device |
| CN111025733A (en) * | 2019-12-13 | 2020-04-17 | 武汉华星光电技术有限公司 | Display module and display device |
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| WO2022077709A1 (en) * | 2020-10-15 | 2022-04-21 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display module |
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| US11940680B2 (en) * | 2020-10-15 | 2024-03-26 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Display panel and display module |
| CN112925125A (en) * | 2021-03-25 | 2021-06-08 | 维沃移动通信有限公司 | Display device and electronic apparatus |
| CN113540186A (en) * | 2021-06-23 | 2021-10-22 | 合肥欣奕华智能机器有限公司 | Peep-proof display panel, display device and preparation method |
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