CN109660643B

CN109660643B - Keyboard display module, display screen and mobile terminal

Info

Publication number: CN109660643B
Application number: CN201811537371.8A
Authority: CN
Inventors: 董星; 朱建锋
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2018-12-15
Filing date: 2018-12-15
Publication date: 2021-08-03
Anticipated expiration: 2038-12-15
Also published as: CN109660643A

Abstract

The invention provides a keyboard display module, a display screen and a mobile terminal, wherein the keyboard display module comprises the display screen, the display screen comprises a main screen area and a variable keyboard display area, and the variable keyboard display area comprises a keycap, a thin film dome set and a sensor layer. The touch sensor module has the advantages that the existing FPC and metal dome sheets are omitted, the problem of shielding the touch sensor is avoided, meanwhile, the thin film dome sheets are arranged above the sensor layer, deformation of a display screen cannot be increased during pressing, the pressing frequency is greatly increased, the touch function is not affected, and the reliability of the module is improved.

Description

Keyboard display module, display screen and mobile terminal

Technical Field

The application relates to the technical field of communication, especially, relate to a keyboard display module assembly, display screen and mobile terminal.

Background

With the development of smart phones, full-screen mobile phones become a popular mobile phone design and function, however, keyboard mobile phones become an important branch of mobile phone product design as a classic style and irreplaceable key experience and input efficiency.

At present, the full-screen design of the smart phone is rapidly developed and popular, the keyboard area of the full-keyboard mobile phone can greatly reduce the display area and the screen occupation ratio of the front face of the mobile phone, the solid full keyboard only serves as the input function of letters, numbers, word symbols and the like while occupying a large amount of surface area of the front face of the mobile phone, and the functionality is not enough to meet the expectation of favoring users of the full-keyboard mobile phone.

Traditional mobile phone keyboard design places Flexible Circuit board (Flexible Printed Circuit, FPC) or metal pot film in the display screen below and presses, and the deformation of display screen can the grow when pressing, leads to pressing the standard that the number of times can't reach consumption level product. If the FPC or the metal dome sheet is placed above the display screen, the flexible circuit board is required to sense the on-off state of the FPC or the metal dome sheet, and the dome sheet is required to be made of metal.

Disclosure of Invention

In order to solve the technical problem, the application provides a keyboard display module, has avoided the problem of shielding the sensor, has improved the reliability of module.

In a first aspect, the application provides a keyboard display module, including the display screen, the display screen includes main screen area and variable keyboard display area, variable keyboard display area includes key cap, film metal dome group and sensor layer.

The keycap is positioned at the uppermost part of the display area of the variable keyboard, the thin film metal dome group is arranged below the keycap, and the sensor layer is arranged below the thin film metal dome group; the display screen is positioned below the sensor layer;

wherein each film dome in the film dome group is inverted.

Further, the keycap, the sensor layer and the thin film dome are transparent.

Furthermore, the keyboard display module further comprises a protective layer, the keycaps are attached to the protective layer, and the thin film metal dome group is located below the protective layer.

Further, the protective layer is transparent.

Furthermore, each film metal dome in the film metal dome group is arranged in one-to-one correspondence with the keycap.

Further, the sensor layer comprises a touch sensor and a pressure sensor, and the touch sensor is located above the pressure sensor.

Further, the touch sensor and the pressure sensor are transparent.

Further, the display area of the variable keyboard accounts for less than 25% of the display screen.

In a second aspect, the present application further provides a display screen, including the keyboard display module according to any one of the first aspects.

In a third aspect, the present application further provides a mobile terminal, including the display screen according to any one of the second aspects, and further including a middle frame, where the display screen is placed on the middle frame.

The beneficial effect of this application does: according to the embodiment of the invention, the existing FPC and metal dome sheet are omitted, the problem of shielding the sensor is avoided, and meanwhile, the film dome sheet is arranged above the sensor layer, so that the deformation of the display screen is not increased during pressing, the pressing frequency is greatly increased, the touch function is not influenced, and the reliability of the module is improved.

Drawings

In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of a front layout structure of a mobile terminal provided in the present application;

fig. 2 is a schematic diagram of a stacked structure of a mobile terminal provided in the present application;

fig. 3 is a schematic circuit structure diagram of a mobile terminal provided in the present application.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

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", 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 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.

The invention provides a keyboard display module suitable for mobile terminal equipment. As shown in fig. 1, which is a schematic diagram of a front layout structure of a mobile terminal provided by the present invention, the keyboard display module includes a display screen 1, and the display screen includes a main screen area 11 and a variable keyboard display area 12.

Specifically, as shown in fig. 2, which is a schematic view of a stacked structure of an embodiment of a mobile terminal, the variable keyboard display area 12 further includes: a key cap 201, a thin film dome set 202 and a sensor layer 203. The thin film dome set 202 includes a plurality of thin film domes (also called thin film switches, english polydome), the key cap 201 is disposed at the top of the variable keyboard display region 12, the sensor layer 203 is disposed below the thin film dome set 202, and the display screen 1 is disposed below the sensor layer 203.

According to the embodiment of the invention, the existing FPC and metal dome sheet are omitted, the problem of shielding the touch sensor is avoided, and meanwhile, the film dome sheet is arranged above the sensor layer, so that the deformation of the display screen is not increased during pressing, the pressing frequency is greatly increased, the touch function is not influenced, and the reliability of the module is improved.

Because the display screen 1 is arranged below the key cap 201, the thin film dome sheet 202 and the sensor layer 203, and the key cap 201, the thin film dome sheet set 202 and the sensor layer 203 are easy to shield the display screen, so that a user cannot view contents in the display screen, in some embodiments of the present invention, the key cap 201, the thin film dome sheet set 202 and the sensor layer 203 are all transparent, which can avoid the problem of shielding the contents of the display screen 1, and the contents displayed on the display screen 1 can be directly viewed by the user through the key cap 201, the thin film dome sheet set 202 and the sensor layer 203.

In some embodiments of the present invention, the keyboard module further includes a protection layer 204, the keycap 201 is located on the protection layer 204, the thin film dome set 202 is located below the protection layer 204, and the protection layer 204 can protect the underlying structure and the stacked layer. Further, the passivation layer 204 is made of a flexible substrate material, and the passivation layer 204 does not affect the signal transmission function and can prevent electrostatic interference while protecting the underlying structure and the stack.

Similarly, since the protection layer 204 is above the display screen 1, the protection layer 204 may also be transparent in order to avoid the protection layer 204 from blocking the contents of the display screen 1.

In the embodiment of the invention, the content displayed by the display screen 1 is correspondingly changed according to different use scenes and different application programs of the mobile terminal by a user, and after the mobile terminal is started; the sensor layer 203 in the mobile terminal detects the state of the display screen 1 at this time, so as to respond to an input instruction of a user on the interface of the mobile terminal, call a corresponding functional interface of the input instruction, and execute corresponding functional operation.

Specifically, the sensor layer further includes a touch sensor and a pressure sensor (not shown), and the touch sensor is located above the pressure sensor.

Generally, a mobile terminal implementing a touch function includes a touch detection unit and a touch sensor (not shown). The touch detection component is arranged on the display screen and used for detecting the touch position of a user and transmitting the touch position to the touch sensor after receiving the touch position; the touch sensor is mainly used for receiving touch information from the touch detection component, converting the touch information into touch coordinates, and sending the touch coordinates to a Central Processing Unit (CPU) of the mobile terminal, wherein the CPU can receive and execute commands sent by the CPU. The touch sensor can be used for detecting the finger placement position of an operator and detecting other gesture operations of the operator, including light touch, light touch double click, sliding and the like, so that different functions such as moving, page turning, word flying and the like can be realized.

The pressure sensor is used for detecting the pressure applied to the point, the threshold value of the pressure sensor is close to the pressure required by the thin film dome group to change the state, namely, when a certain keycap is pressed down with certain force, the thin film dome group changes the state to generate the feeling that the keycap is pressed down, and meanwhile, the pressure sensor detects that the threshold value is reached and informs the master control that the key is pressed down. On the contrary, when no external force is applied to the display screen, the pressure sensor does not sense the pressure, at the moment, the state of the thin film dome set is recovered, and the pressure sensor informs the main control key to recover the original state.

Similarly, since the sensor layer 203 is above the display screen 1, in order to avoid the sensor layer 203 from shielding the content of the display screen 1, the sensor layer 203 is transparent, so both the touch sensor and the pressure sensor should be transparent, and thus the sensor layer 203 is transparent as a whole, thereby avoiding the problem of shielding the content of the display screen 1 due to the non-transparency of the sensor layer 203.

Further, each of the thin film dome sheets in the thin film dome sheet group 202 is arranged in one-to-one correspondence with the pressed keycap 201. Specifically, when the keyboard display module comprises the protective layer, the film dome group 202 is arranged below the protective layer in an inverted mode, namely each film dome in the film dome group is inverted and corresponds to each keycap position, and each film dome is inverted.

Preferably, in the embodiment of the present invention, a waterproof breathable film may be disposed below the main screen region 11, and the waterproof breathable film is used to balance the pressure difference between the inside and the outside of the mobile terminal, and also has a good waterproof effect, so that the waterproof grade of the entire mobile terminal can reach the use standard.

In the keyboard display module in the embodiment of the invention, the display screen 1 comprises a main screen area 11 and a variable keyboard display area 12, and the main screen area 11 is an area mainly used by a user for checking, so that the keyboard display module can experience the key function and ensure a good visual effect, wherein the proportion of the variable keyboard area 12 in the whole display screen is less than 25%.

The embodiment of the invention also provides a display screen which comprises the keyboard display module described in any one of the keyboard display module embodiments.

As shown in fig. 2, the mobile terminal includes a display screen 1, a middle frame 205, and a back cover 206, where the display screen 1 is disposed on the middle frame 205, and the back cover 206 is located at an outermost layer of the mobile terminal.

Preferably, the display screen 1 and the middle frame 205 may be connected by a double-sided tape or glue.

Preferably, the periphery of the middle frame 205 may be provided with a protruding structure and a bending region, and the area of the display screen 1 is smaller than the area of the middle frame 205, and the display screen 1 may be connected with the middle frame 205 through the protruding structure and the bending region.

According to the mobile terminal, the FPC and the metal dome sheet are omitted, the thin film dome sheet set 202 is arranged above the sensor layer 203, deformation of the display screen cannot be increased during pressing, the pressing frequency can be greatly increased, the touch function is not affected, and reliability of the mobile terminal is improved.

Accordingly, as shown in fig. 3, the mobile terminal may include Radio Frequency (RF) circuit 301, a memory 302 including one or more computer-readable storage media, an input unit 303, a display unit 304, a sensor 305, an audio circuit 306, a Wireless Fidelity (WiFi) module 307, a processor 308 including one or more processing cores, and a power supply 309. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 3 is not intended to be limiting of mobile terminals and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. Wherein:

the RF circuit 301 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, for receiving downlink information from a base station and then processing the received downlink information by one or more processors 308; in addition, data relating to uplink is transmitted to the base station. In general, the RF circuit 301 includes, but is not limited to, an antenna, at least one Amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuitry 301 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), and the like.

The memory 302 may be used to store software programs and modules, and the processor 308 executes various functional applications and data processing by operating the software programs and modules stored in the memory 302. The memory 302 may mainly include a storage program area and a storage data area, wherein the storage program area may store an application program (such as a sound playing function, an image playing function, etc.) required for operating a storage medium, at least one function, and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Further, the memory 302 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 302 may also include a memory controller to provide the processor 308 and the input unit 303 access to the memory 302.

The input unit 303 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, in one particular embodiment, the input unit 303 may include a touch-sensitive surface as well as other input devices. The touch-sensitive surface, also referred to as a touch display screen or a touch pad, may collect touch operations by a user (e.g., operations by a user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment) thereon or nearby, and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 308, and can receive and execute commands sent by the processor 308. In addition, touch sensitive surfaces may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. The input unit 303 may include other input devices in addition to the touch-sensitive surface. In particular, other input devices may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 304 may be used to display information input by or provided to the user and various graphical user interfaces of the mobile terminal, which may be made up of graphics, text, icons, video, and any combination thereof. The Display unit 304 may include a Display panel, and optionally, the Display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor 308 to determine the type of touch event, and the processor 308 then provides a corresponding visual output on the display panel according to the type of touch event. Although in FIG. 3 the touch-sensitive surface and the display panel are shown as two separate components to implement input and output functions, in some embodiments the touch-sensitive surface may be integrated with the display panel to implement input and output functions.

The mobile terminal may also include at least one sensor 305, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that may turn off the display panel and/or the backlight when the mobile terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile terminal, further description is omitted here.

Audio circuitry 306, a speaker, and a microphone may provide an audio interface between the user and the mobile terminal. The audio circuit 306 may transmit the electrical signal converted from the received audio data to a speaker, and convert the electrical signal into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electric signal, which is received by the audio circuit 306 and converted into audio data, which is then processed by the audio data output processor 308, and then transmitted to, for example, another mobile terminal via the RF circuit 301, or the audio data is output to the memory 302 for further processing. The audio circuitry 306 may also include an earbud jack to provide communication of a peripheral headset with the mobile terminal.

WiFi belongs to a short-distance wireless transmission technology, and the mobile terminal can help a user to send and receive e-mails, browse webpages, access streaming media and the like through the WiFi module 307, and provides wireless broadband internet access for the user. Although fig. 3 shows the WiFi module 307, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 308 is a control center of the mobile terminal, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 302 and calling data stored in the memory 302, thereby performing overall monitoring of the mobile phone. Optionally, processor 308 may include one or more processing cores; preferably, the processor 308 may integrate an application processor, which handles primarily the operation of storage media, user interfaces, applications, etc., and a modem processor, which handles primarily the wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 308.

The mobile terminal also includes a power supply 309 (e.g., a battery) for powering the various components, which may be logically coupled to the processor 308 via a power management storage medium that may be used to manage charging, discharging, and power consumption. The power supply 309 may also include any component of one or more dc or ac power sources, rechargeable storage media, power failure detection circuitry, power converters or inverters, power status indicators, and the like.

Although not shown, the mobile terminal may further include a camera, a bluetooth module, and the like, which will not be described herein. Specifically, in this embodiment, the processor 308 in the mobile terminal loads the executable file corresponding to the process of one or more application programs into the memory 302 according to the following instructions, and the processor 308 runs the application programs stored in the memory 302, thereby implementing various functions.

The display unit 304 of the mobile terminal in the embodiment of the present invention includes the keyboard display module described in any of the above embodiments of the present invention.

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

1. The keyboard display module is characterized by comprising a display screen, wherein the display screen comprises a main screen area and a variable keyboard display area, and the variable keyboard display area comprises a keycap, a thin film dome set and a sensor layer;

wherein each film dome in the film dome group is inverted.

2. The keyboard display module of claim 1, wherein the keycap, the sensor layer, and the membrane dome are transparent.

3. The keyboard display module of claim 2, further comprising a protective layer, wherein the keycap is attached to the protective layer, and the membrane dome is located below the protective layer.

4. The keyboard display module of claim 3, wherein the protective layer is transparent.

5. The keyboard display module of claim 1, wherein each of the membrane dome sets is disposed in one-to-one correspondence with the keycap.

6. The keyboard display module of claim 1, wherein the sensor layer comprises a touch sensor and a pressure sensor, the touch sensor being located above the pressure sensor.

7. The keyboard display module of claim 6, wherein the touch sensor and the pressure sensor are transparent.

8. The keyboard display module of claim 1, wherein the variable keyboard display area comprises less than 25% of the display screen.

9. A display screen, comprising the keyboard display module according to any one of claims 1 to 8.

10. A mobile terminal comprising the display of claim 9, the mobile terminal comprising a middle frame, the display being disposed on the middle frame.