CN108833614B

CN108833614B - Display screen, electronic device and manufacturing method of display screen

Info

Publication number: CN108833614B
Application number: CN201810265021.4A
Authority: CN
Inventors: 张海平
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-03-28
Filing date: 2018-03-28
Publication date: 2020-09-11
Anticipated expiration: 2038-03-28
Also published as: CN108833614A

Abstract

The invention discloses a display screen, an electronic device and a display screen manufacturing method. The display screen comprises an organic light-emitting layer, a TFT circuit layer and an infrared sensor. The TFT circuit layer is arranged below the organic light-emitting layer and used for driving the organic light-emitting layer to emit light to display. An infrared sensor is disposed within the TFT circuit layer, the infrared sensor for emitting and/or receiving infrared light through the organic light emitting layer. The invention also provides a manufacturing method of the electronic device and the display screen. According to the display screen, the electronic device and the display screen manufacturing method, the infrared sensor can be arranged in the TFT circuit layer under the condition of a complete screen, and the phenomenon of screen flicker caused by the fact that the infrared sensor is arranged below the screen can be avoided.

Description

Display screen, electronic device and manufacturing method of display screen

Technical Field

The invention relates to the technical field of electronics, in particular to a display screen, an electronic device and a manufacturing method of the display screen.

Background

Generally, an electronic device such as a mobile phone includes a display screen and an infrared sensor, and the infrared sensor can be used to detect a distance between an object outside the display screen and the display screen. With the development of mobile phone technology and the demand of users, a full-screen mobile phone becomes the development trend of mobile phones, but the current position arrangement of infrared sensors makes the screen of the mobile phone occupy a smaller area. However, when the infrared sensor is disposed below the display screen, a flickering phenomenon of the screen is easily caused.

Disclosure of Invention

In order to solve the technical problem, embodiments of the invention provide a display screen, an electronic device and a display screen manufacturing method.

The display screen of the embodiment of the invention comprises:

an organic light emitting layer;

the TFT circuit layer is arranged below the organic light-emitting layer and used for driving the organic light-emitting layer to emit light to display; and

and the infrared sensor is arranged on the TFT circuit layer and is used for transmitting and/or receiving infrared light through the organic light-emitting layer.

The electronic device comprises a shell and the display screen.

The manufacturing method of the embodiment of the invention comprises the following steps:

providing an organic light emitting layer;

a TFT circuit layer is arranged below the organic light-emitting layer and used for driving the organic light-emitting layer to emit light for displaying; and

and arranging an infrared sensor on the TFT circuit layer, wherein the infrared sensor is used for transmitting and/or receiving infrared light through the organic light-emitting layer.

According to the display screen, the electronic device and the display screen manufacturing method, the infrared sensor is arranged in the TFT circuit layer, so that the screen occupation ratio of the electronic device is improved, the electronic device is favorable for achieving a comprehensive screen effect, and the phenomenon of flicker of infrared light emitted by the infrared sensor on the display screen can be avoided.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of an electronic device according to the present invention;

FIG. 2 is a schematic cross-sectional view of an electronic device according to some embodiments of the invention;

FIG. 3 is an enlarged schematic view at III of FIG. 2 of the present invention;

FIG. 4 is a schematic cross-sectional view of an electronic device according to some embodiments of the invention;

FIG. 5 is an enlarged schematic view of the invention at V of FIG. 4;

fig. 6-11 are schematic cross-sectional views of electronic devices according to some embodiments of the invention; and

fig. 12-16 are flow diagrams of methods of manufacturing in accordance with certain embodiments of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Electronic devices, such as mobile phones or tablet computers, generally have infrared sensors installed to detect the distance between the electronic device and a user. Taking a mobile phone as an example, an infrared sensor is arranged in the upper area of the mobile phone. When a user carries out voice call or related operation, the mobile phone is close to the head, the infrared sensor feeds distance information back to the processor, and the processor executes corresponding instructions, such as closing light of the display screen assembly. In the related art, the infrared sensor is disposed on the electronic device, and the corresponding hole is required to be formed in the housing for transmitting and receiving the infrared light signal, but with the rapid development of the electronic device, the requirements of people on the appearance and the operation experience of the mobile phone are higher and higher. The mobile phone is developed towards a full-screen mobile phone, and the full-screen mobile phone forms an ultra-narrow frame between a shell and a display screen assembly, and due to the fact that the width of the ultra-narrow frame is too small, the ultra-narrow frame may not have enough space for forming holes, and the strength of the whole frame is reduced even if the holes are formed. However, when the infrared sensor is disposed below the display screen, the infrared light easily excites electrons in the display screen due to a photoelectric effect to cause a flickering phenomenon of the screen.

Referring to fig. 1, an electronic device 100 according to an embodiment of the invention may be a mobile phone or a tablet computer. The electronic device 100 according to the embodiment of the present invention is described by taking a mobile phone as an example, but it is to be understood that the specific form of the electronic device 100 may be other, and is not limited herein.

Referring to fig. 2 and 3, the electronic device 100 includes a display 13 and a housing 20. Among them, the display 13 includes an organic light emitting layer 133, a TFT circuit layer 134, and an infrared sensor 16. The TFT circuit layer 134 is disposed under the organic light emitting layer 133, and the TFT circuit layer 134 is used to drive the organic light emitting layer 133 to perform light emitting display.

Since the infrared sensor 16 and the TFT circuit layer 134 are disposed on the same layer, when the infrared sensor 16 emits infrared light to the outside, the infrared light does not pass through the TFT circuit layer 134, and thus electrons in the TFT circuit layer 134 are not excited, thereby preventing a screen from flickering.

The infrared sensor 16 includes a transmitter 1611 and a receiver 1612, the transmitter 1611 is used for transmitting infrared light, when the transmitted infrared light meets an obstacle in the detection direction, a part of the infrared light is reflected back to be received by the receiver 1612, and the processor calculates the time from the transmission of the infrared light to the reflection of the infrared light, so that the distance between the electronic device 100 and the obstacle can be determined and corresponding adjustment can be made. When a user answers or makes a call, the electronic device 100 is close to the head, the emitter 1611 emits infrared light, the receiver 1612 receives the reflected infrared light, the processor calculates the time from the emission of the infrared light to the reflection of the infrared light, and then sends a corresponding instruction to control the screen light to be turned off, and when the electronic device 100 is far away from the head, the processor calculates according to the fed back data again and sends an instruction to turn on the screen light again. Therefore, misoperation of the user is prevented, and the electric quantity of the mobile phone is saved.

The housing 20 is used to house components and assemblies for protection. By providing the housing 20 to enclose the components and assemblies, direct damage to these components from external factors is avoided. The housing 20 may be formed by CNC machining of an aluminum alloy, or may be injection molded using Polycarbonate (PC) or PC + ABS material.

In summary, in the electronic device 100 according to the embodiment of the invention, the infrared sensor 16 can be disposed in the TFT circuit layer under the condition of a full screen, thereby avoiding the conventional hole-opening operation, ensuring the reliability of the overall strength of the electronic device 100, and further improving the screen occupation ratio of the electronic device 100. Meanwhile, infrared light emitted by the infrared sensor 16 does not pass through the TFT circuit layer, so that the phenomenon of screen flicker is avoided.

Referring to fig. 3, in some embodiments, the TFT circuit layer 134 includes TFT circuits 1341 and a light blocking member 1342, and the light blocking member 1342 is disposed between the emitter 1611 and the TFT circuits 1341 to block infrared light emitted by the emitter 1611 from entering the TFT circuits 1341.

Specifically, since light has volatility, when the transmitter 1611 emits an infrared beam outward, there is inevitably divergence, and such divergent infrared light may enter the TFT circuit 1341, thereby exciting electrons in the TFT circuit 1341 to cause screen flicker. To prevent this from happening, a light blocking element 1342 is disposed between the emitter 1611 and the TFT circuit 1341 to block infrared astigmatism during operation of the emitter 1611 from entering the TFT circuit 1341.

Further, in such embodiments, the light blocking member 1342 comprises foam.

Specifically, the light blocking member 1342 is mainly used for blocking infrared light, so that foam made of black material may be used, and other black foam plastics or rubber or metal materials may also be used. Of course, these materials are merely exemplary and embodiments of the present invention are not limited in this respect.

In some embodiments, the light blocking member 1342 surrounds the emitter 1611.

Specifically, in order to maximally block the infrared light scattering of the emitter 1611, the light blocking element 1342 may be used to surround the emitter 1611 and avoid the space where the emitter 1611 emits the infrared light, so as to block the infrared light scattering without blocking the path direction of the emitter 1611 that normally emits the infrared light.

In some embodiments, a light blocking member 1342 is adhesively secured between the emitter 1611 and the TFT circuitry 1341.

Specifically, the mobile phone inevitably receives external impact to cause vibration during actual use, and the light blocking element 1342 may be adhesively fixed between the emitter 1611 and the TFT circuit 1341 to ensure stability of blocking infrared light scattering.

Referring to fig. 4, in some embodiments, the transmitter 1611 and the receiver 1612 are arranged separately.

Specifically, since the transmitter 1611 and the receiver 1612 are in a split structure, a compact arrangement or a dispersed arrangement may be selected for the arrangement position, and the receiver 1612 may be flexibly disposed at different positions. As such, it is not only advantageous for electronic device 100 to fully allocate the spatial locations of the various elements and employ transmitters 1611 and receivers 1612 in a variety of shapes, but it is also advantageous for transmitters 1611 and receivers 1612 to provide possible locations for other elements in electronic device 100.

Referring to fig. 5, further, in such an embodiment, the infrared sensor includes a package 1613, and the package 1613 integrally encapsulates the emitter 1611 and the light blocking member 1342.

Specifically, the emitter 1611 and the light blocking element 1342 may be integrally encapsulated by an encapsulation technique, so that the positions of the light blocking element 1342 and the emitter 1611 can be more compact, and the light blocking element 1342 is not easily separated from the emitter 1611, which is beneficial to improving the stability of the light blocking element 1342 for blocking infrared astigmatism.

Referring to fig. 3, in some embodiments, the transmitter 1611 and the receiver 1612 are integrally formed.

Specifically, the emitter 1611 and the receiver 1612 are integrated, so that the number of circuit process steps and wiring space between the emitter 1611 and the receiver 1612 can be reduced, the production efficiency of products can be improved, the production cost can be reduced, and the overhaul and maintenance of elements can be facilitated.

Further, in such embodiments, the infrared sensor includes an enclosure 1613 enclosing the emitter 1611 and the receiver 1612, and the light blocking member 1342 is integrally enclosed with the enclosure 1613.

Specifically, the emitter 1611, the receiver 1612 and the light blocking element 1342 may be integrally packaged by using a packaging technology, so that the positions of the light blocking element 1342 and the emitter 1611 can be more compact, and meanwhile, the light blocking element 1342 is not easily separated from the emitter 1611, which is beneficial to improving the stability of the light blocking element 1342 in blocking infrared astigmatism.

Referring to fig. 6 or fig. 7, in some embodiments, the electronic device 100 further includes a light-transmissive cover 11 and a light-transmissive touch panel 12. The light-transmitting cover plate 11 is formed on the light-transmitting touch panel 12, the light-transmitting touch panel 12 is arranged on the display screen 13, and the light-transmitting cover plate 11 and the light-transmitting touch panel 12 have a visible light transmittance and an infrared light transmittance which are both greater than 90%.

Specifically, the light-transmitting touch panel 12 is mainly used for receiving an input signal generated when a user touches the light-transmitting touch panel 12 and transmitting the input signal to the circuit board for data processing, so as to obtain a specific position where the user touches the light-transmitting touch panel 12. The light-transmitting touch panel 12 and the display screen 13 can be attached by adopting an In-Cell or On-Cell attaching technology, so that the weight of the display screen can be effectively reduced, and the overall thickness of the display screen can be reduced. In addition, the transparent cover 11 is disposed on the transparent touch panel 12, so as to effectively protect the transparent touch panel 12 and the internal structure thereof, and prevent the transparent touch panel 12 and the display screen 13 from being damaged by external force. The light transmittance of the light-transmitting cover plate 11 and the light-transmitting touch panel 12 to visible light and infrared light is greater than 90%, which is not only beneficial to the display screen 13 to better display the content effect, but also beneficial to the infrared sensor 16 to stably emit and receive infrared light, and ensures the normal work of the infrared sensor 16.

Referring to fig. 8 or 9, in some embodiments, the electronic device 100 further includes a cover buffer layer 18, and the buffer layer 18 is disposed below the display 13.

Specifically, the buffer layer 18 is used to buffer impact and prevent shock so as to protect the light-transmitting touch panel 12, the display screen 13 and the internal structure thereof, and prevent the display screen from being damaged due to external impact. Cushioning layer 18 may be made of foam or rubber or other soft material. Of course, these cushioning materials are merely exemplary and embodiments of the present invention are not limited in this respect.

Referring to fig. 10 or fig. 11, further, in this embodiment, the electronic device 100 further includes a metal sheet 19, and the metal sheet 19 is disposed below the buffer layer 18.

Specifically, the metal sheet 19 is used for shielding electromagnetic interference and grounding, and has a function of diffusing temperature rise. The metal sheet 19 may be cut out of a metal material such as copper foil or aluminum foil. Of course, these metal materials are merely exemplary and embodiments of the present invention are not limited thereto.

Referring to fig. 3 and 12, the embodiment of the invention provides a method 30 for manufacturing a display 13, including the following steps:

s301, providing an organic light emitting layer;

s302, a TFT circuit layer is arranged below the organic light-emitting layer and used for driving the organic light-emitting layer to emit light to display; and

s303, disposing an infrared sensor on the TFT circuit layer, the infrared sensor being configured to transmit and/or receive infrared light through the organic light emitting layer.

In the method 10 for manufacturing the display 13 according to the embodiment of the present invention, the infrared sensor 16 is disposed in the TFT circuit layer 134, which not only increases the screen occupation ratio of the electronic device 100, is beneficial to the electronic device 100 to achieve a full screen effect, but also can avoid a flicker phenomenon caused by infrared light emitted by the infrared sensor 16 to the display 13.

Referring to fig. 3, 5 and 13, in some embodiments, the infrared sensor 16 includes an emitter 1611 and a receiver 1612, the TFT circuit layer 134 includes TFT circuits 1341 and light blocking members 1342, and the manufacturing method 30 further includes the steps of:

s304, a light blocking element is arranged between the emitter and the TFT circuit to block infrared light emitted by the emitter from entering the TFT circuit layer.

Referring to fig. 3, 5 and 14, further, in this embodiment, the method 30 for manufacturing the display 13 further includes the steps of:

s305, the light blocking element is surrounded by the emitter.

Specifically, in order to maximally block the infrared scattering light of the emitter 1611, the light blocking element 1342 may be used to surround the emitter 1611 and avoid the space in the emitting direction of the emitter 1611, so as to block the infrared scattering light without blocking the path direction of the emitter 1611 for normally emitting infrared light.

Referring to fig. 3, 5 and 15, further, in this embodiment, the method 30 for manufacturing the display 13 further includes the steps of:

s306, the light blocking element is fixedly bonded between the emitter and the TFT circuit.

Referring to fig. 3, 5 and 16, in some embodiments, the method 30 for manufacturing the display 13 further includes the steps of:

s307, providing a package for packaging the emitter and the receiver, and integrally packaging the light blocking element and the package.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The above disclosure provides many different embodiments, or examples, for implementing different features of the invention. The components and arrangements of the specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A display screen, comprising;

an organic light emitting layer;

an infrared sensor disposed within the TFT circuit layer, the infrared sensor for emitting and/or receiving infrared light through the organic light emitting layer;

the infrared sensor comprises an emitter, the TFT circuit layer comprises a TFT circuit and a light blocking element, and the light blocking element is arranged between the emitter and the TFT circuit to block infrared light emitted by the emitter from entering the TFT circuit.

2. A display screen as recited in claim 1, wherein the infrared sensor comprises a receiver.

3. A display screen in accordance with claim 2, wherein the light blocking member comprises foam.

4. A display screen in accordance with claim 2 wherein the light blocking member surrounds the emitter.

5. A display screen in accordance with claim 2, wherein the light blocking member is adhesively secured between the emitter and the TFT circuitry.

6. A display screen in accordance with claim 2, wherein the transmitter is provided separate from the receiver.

7. A display screen in accordance with claim 6, wherein the infrared sensor comprises an encapsulant that integrally encapsulates the emitter and the light blocking member.

8. A display screen as recited in claim 2, wherein the transmitter is integral with the receiver.

9. A display screen as recited in claim 8, wherein the infrared sensor includes an encapsulant encapsulating the emitter and the receiver, the light blocking member being integrally encapsulated with the encapsulant.

10. An electronic device, comprising:

a housing; and

a display screen according to any one of claims 1 to 9.

11. The electronic device according to claim 10, further comprising a light-transmissive touch panel and a light-transmissive cover formed on the light-transmissive touch panel, wherein the light-transmissive touch panel is disposed on the display screen, and both the transmittance of visible light and the transmittance of infrared light of the light-transmissive touch panel and the light-transmissive cover are greater than 90%.

12. The electronic device of claim 10, further comprising a buffer layer disposed below the display screen.

13. The electronic device of claim 12, further comprising a metal sheet disposed below the buffer layer.

14. A method for manufacturing a display screen, comprising the steps of:

providing an organic light emitting layer;

an infrared sensor is arranged in the TFT circuit layer and used for transmitting and/or receiving infrared light through the organic light-emitting layer;

15. The manufacturing method according to claim 14, wherein the infrared sensor includes an emitter and a receiver, the TFT circuit layer includes a TFT circuit and a light blocking member, the manufacturing method further comprising the steps of:

the light blocking element is arranged between the emitter and the TFT circuit to block infrared light emitted by the emitter from entering the TFT circuit layer.

16. The method of manufacturing of claim 15, further comprising the steps of:

surrounding the light-blocking element around the emitter.

17. The method of manufacturing of claim 16, further comprising the steps of:

and adhering and fixing the light blocking element between the emitter and the TFT circuit.

18. The method of manufacturing of claim 16, further comprising the steps of:

and providing a packaging body for packaging the emitter and the receiver and integrally packaging the light blocking element and the packaging body.