CN210222421U

CN210222421U - Liquid crystal display based on electronic paper

Info

Publication number: CN210222421U
Application number: CN201921445882.7U
Authority: CN
Inventors: Wei Zhao; 赵威; Nan Li; 李楠; Guofu Zhou; 周国富
Original assignee: Shenzhen Guohua Optoelectronics Co Ltd
Current assignee: Shenzhen Guohua Optoelectronics Co Ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-03-31
Anticipated expiration: 2029-09-02

Abstract

The utility model discloses a liquid crystal display based on electronic paper, which comprises a liquid crystal display screen and a base, wherein a main control module and a power supply are arranged inside the base, an electronic paper display panel is arranged on the back surface of the base, a noise monitoring module is arranged on the base, the main control module is respectively electrically connected with the liquid crystal display screen, the electronic paper display panel and the noise monitoring module, and the power supply is used for providing a working power supply for the main control module, the liquid crystal display screen, the electronic paper display panel and the noise monitoring module; electronic paper display panel can provide a not stroboscopic display picture for the user can carry out long-time text reading and editing, effectively alleviate eye fatigue, also can save the electrical energy loss simultaneously, in addition, the noise monitor can real-time detection user's sound size when the broadcast video, and remind the user through showing sound decibel value at liquid crystal display, thereby reach the effect of protection sense of hearing, it has simple structure, practicality advantage such as high.

Description

Liquid crystal display based on electronic paper

Technical Field

The utility model relates to a display device field, especially a liquid crystal display based on electronic paper.

Background

The liquid crystal display screen, it is a kind of flat display screen, this display screen has a small, the radiation is low, widely used in the screen display of computer and television, but this kind of display screen is when using, still there are some drawbacks, when the user just reads basic functions such as data such as the electronic document with the display screen, the power supply of display screen needs to provide the power for display screen always, this also makes its internal control circuit need to be in the working condition always, this makes the electric quantity loss of the apparatus very big, and during dynamic liquid crystal display screen, the display screen can produce the scintillation of a fixed frequency cycle, make people's eye tired easily, be unsuitable for carrying on the characters editor for a long time.

In addition, current liquid crystal display does not all possess the noise detection function, and when the user was using TV set or computer broadcast video, the size of broadcast sound can't be known to the user, if watch the video under the environment of higher decibel for a long time, caused serious influence to the sense of hearing easily.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a simple structure's liquid crystal display based on electronic paper.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a liquid crystal display based on electronic paper, includes liquid crystal display and is used for the assembly liquid crystal display's base, the inside of base is provided with host system and power supply, the back of base is provided with electronic paper display panel, be provided with noise monitoring module on the base, host system respectively with liquid crystal display, electronic paper display panel and noise monitoring module electricity are connected, power supply is used for host system, liquid crystal display, electronic paper display panel and noise monitoring module provide working power supply.

The electronic paper display panel comprises an insulating substrate, an electronic paper display layer and a touch screen layer, the electronic paper display layer is covered on the surface of the insulating substrate, the electronic paper display layer is provided with a transparent glass substrate between the touch screen layer, the touch screen layer is covered on the surface of the transparent glass substrate, the back cover of the transparent glass substrate is covered on the electronic paper display layer, and the electronic paper display layer is connected with the touch screen layer and is electrically connected with the main control module.

The power supply is provided with a transformation module, and the transformation module comprises a toggle switch SW, a voltage stabilizer U2, a capacitor C17 and a capacitor C18; a pin 1 of the toggle switch SW is suspended; pin 2 of the toggle switch SW is connected with the power supply; pin 3 of the toggle switch SW is connected with pin 3 of the voltage stabilizer U2; pin 1 of the voltage stabilizer U2 is grounded; the 2 pins of the voltage stabilizer U2 are divided into two paths, one path outputs a 3.3V power supply outwards, and the other path is grounded through the capacitor C18; the 4 pins of the voltage stabilizer U2 are suspended; one end of the capacitor C17 is connected to the node between pin 3 of the toggle switch SW and pin 3 of the voltage regulator U2, and the other end is grounded.

The noise monitoring module comprises a noise detector Pin4, wherein a Pin 1 of the noise detector Pin4 is grounded, a Pin 2 of the noise detector Pin4 is connected with a 5V power supply, a Pin 3 of the noise detector Pin4 is suspended, and a Pin4 of the noise detector Pin4 is connected with a Pin 10 of the main controller U1.

An alarm module is arranged on the base and comprises a resistor R9 and a light emitting diode LED1, the anode of the light emitting diode LED1 is connected with a 3.3V power supply through the resistor R9, and the cathode of the light emitting diode LED1 is connected with an 18 pin of the master controller U1.

And a protective layer is covered on the surface of the touch screen layer.

The utility model has the advantages that: the utility model discloses an electronic paper display panel can provide a not stroboscopic display picture for the user can carry out long-time text reading and edit, effectively alleviate eye fatigue, also can save the electrical energy loss simultaneously, in addition, the noise monitor can real-time detection user's sound size when the broadcast video, and remind the user through showing sound decibel value at liquid crystal display, thereby reach the effect of protection sense of hearing, it has simple structure, practicality advantage such as high.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic front structural view of the present invention;

fig. 2 is a schematic view of the back structure of the present invention;

fig. 3 is a schematic structural diagram of an electronic paper display panel according to the present invention;

fig. 4 is a schematic block circuit diagram of the present invention;

fig. 5 is a first part of a circuit schematic of the present invention;

fig. 6 is a second part of the circuit schematic of the present invention;

fig. 7 is a third part of the circuit schematic of the present invention.

Detailed Description

Referring to fig. 1 to 7, an electronic paper-based liquid crystal display screen includes a liquid crystal display screen 1 and a base 2 for assembling the liquid crystal display screen 1, a main control module 3 and a power supply 4 are disposed inside the base 2, and an electronic paper display panel 5 is disposed on the back of the base 2, specifically, the electronic paper display panel 5 is hinged to the back of the base 2, when the electronic paper display panel 5 is not used, the electronic paper display panel 5 can be hidden on the back of the base 2, and when the electronic paper display panel 5 needs to be used, the electronic paper display panel 5 can be turned over from the back of the base 2 for use, and the operation is simple and convenient; be provided with noise monitoring module 6 on the base 2, host system 3 respectively with liquid crystal display 1, electronic paper display panel 5 and noise monitoring module 6 electricity are connected, power supply 4 is used for giving host system 3, liquid crystal display 1, electronic paper display panel 5 and noise monitoring module 6 provide working power supply.

In this embodiment, the electronic paper display panel 5 includes an insulating substrate 7, an electronic paper display layer 8 and a touch screen layer 9, the electronic paper display layer 8 is covered on the surface of the insulating substrate 7, a transparent glass substrate 10 is disposed between the electronic paper display layer 8 and the touch screen layer 9, the touch screen layer 9 is covered on the surface of the transparent glass substrate 10, the back surface of the transparent glass substrate 10 is covered on the electronic paper display layer 8, and both the electronic paper display layer 8 and the touch screen layer 9 are electrically connected to the main control module 3; in this embodiment, the electronic paper display layer is an electronic paper display screen, the touch screen layer is a projected capacitive touch screen, and the transparent glass substrate 10 separates the electronic paper display layer 8 from the touch screen layer 9, which is beneficial to improving the heat dissipation efficiency of the electronic paper display layer 8 and the touch screen layer 9; further, in this embodiment, the surface cover of touch-sensitive screen layer 9 is equipped with protective layer 13, protective layer 13 is transparent toughened glass board, and is right touch-sensitive screen layer 9 plays dustproof and waterproof's effect.

The main control module comprises a main controller U1, a starting circuit, a crystal oscillator circuit, a reset circuit, a decoupling circuit, a download port J1 and a serial port J2; the main controller U1 is respectively electrically connected with the starting circuit, the crystal oscillator circuit, the reset circuit, the decoupling circuit, the download port J1 and the serial port J2; in this embodiment, the master controller U1 is an STM32 series single chip microcomputer, the start circuit includes a start chip PB, a resistor R1 and a resistor R2, and a pin 1 of the start chip PB is connected to a 3.3V power supply; a pin 2 of the starting chip PB is connected with a pin 1 of the starting chip PB and a node of a 3.3V power supply; pin 3 of the startup chip PB is connected with pin 20 of the master U1 through the resistor R2; the pin4 of the starting chip PB is connected with the pin 44 of the master U1 through the resistor R1; the pin 5 of the starting chip PB is grounded; in this embodiment, when the pin4 of the start chip PB is at a low level, the start mode of the master controller U1 is to start the user flash memory; when the pin4 of the start chip PB is at a high level and the pin 3 of the start chip PB is at a low level, the start mode of the master controller U1 is to start the system memory; when the pin 3 and the pin4 of the boot chip PB are both high level, the boot mode is to boot sram (static random access memory) embedded in the master controller U1; in this embodiment, the resistor R1 and the resistor R2 play roles of current limiting and interference resistance, so as to better protect the start chip PB; in this embodiment, the crystal oscillation circuit includes a crystal oscillator Y2, a crystal oscillator Y3, a resistor R3, a capacitor C1, a capacitor C2, a capacitor C14, and a capacitor C15; one end of the crystal oscillator Y2 is divided into two paths, one path is connected with the 6 pins of the master controller U1, and the other path is grounded through the capacitor C2; the other end of the crystal oscillator Y2 is also divided into two paths, one path is connected with the 5 pins of the master controller U1, and the other path is connected with the node between the capacitor C2 and the ground through the capacitor C1; one end of the crystal oscillator Y3 is divided into two paths, one path is connected with the 4 pins of the master controller U1, and the other path is grounded through the capacitor C15; the other end of the crystal oscillator Y3 is also divided into two paths, one path is connected with the 3 pins of the master controller U1, and the other path is connected with the node between the capacitor C15 and the ground through the capacitor C14; in this embodiment, the crystal oscillator Y2, the resistor R3, the capacitor C1, and the capacitor C2 constitute a primary frequency crystal oscillator circuit to provide a primary frequency crystal oscillator for the master controller U1, and the crystal oscillator Y3, the capacitor C14, and the capacitor C15 constitute a clock crystal oscillator circuit to provide a clock frequency for the circuit; further, the resistor R3 acts as negative feedback on one hand, and can maintain the balance of the circuit; on the other hand, the circuit also plays a role in current limiting, the crystal oscillator Y2 is effectively prevented from being damaged, and the capacitor C1, the capacitor C2, the capacitor C14 and the capacitor C15 are used for filtering high-frequency noise waves in oscillation waveforms of the crystal oscillator Y2 and the crystal oscillator Y3, so that the stability of oscillation signals is kept; in this embodiment, the reset circuit includes a resistor R4, a capacitor C3, and a reset switch key, one end of the reset switch key is divided into two paths, one path is connected to the 7 pins of the main controller U1, the other path is connected to a 3.3V power supply through the resistor R4, and the other end of the reset switch key is grounded; one end of the capacitor C3 is connected with the node of the reset switch key and the ground, and the other end is connected with the node of the reset switch key and the resistor R4; the reset circuit is used for restoring the system to an initial state; in the embodiment, the decoupling circuit comprises a capacitor C4, a capacitor C5, a capacitor C6 and a capacitor C7, wherein one end of the capacitor C4 is grounded, and the other end is connected with a 3.3V power supply; one end of the capacitor C7 is connected with a node between the capacitors C4 and C3.3V power supply, and the other end is connected with a node between the capacitor C4 and 3.3V power supply; one end of the capacitor C5 is connected with a node between the capacitor C7 and a 3.3V power supply, and the other end is connected with a node between the capacitor C4 and the ground; one end of the capacitor C6 is connected with a node between the capacitor C7 and a 3.3V power supply, and the other end is connected with a node between the capacitor C4 and the ground; the decoupling circuit can provide a stable power supply, can reduce the noise of an element coupled with the power supply, and indirectly reduces the influence of the noise of the element on other elements, thereby playing a role of resisting interference; in this embodiment, pin 1 of the download port J1 is grounded; a pin 2 of the download port J1 is connected with a 3.3V power supply; the 3 pins of the download port J1 are connected with the 37 pins of the master U1; the 4 pins of the download port J1 are connected with the 34 pins of the master U1; a pin 1 of the serial port J2 is grounded; the 2 pin of the serial port J2 is connected with a 3.3V power supply; the 3 pins of the serial port J2 are connected with the 31 pins of the master controller U1; the 4 pins of the serial port J2 are connected with the 30 pins of the master controller U1; the download port and the serial port provide an expansion interface for the master controller U1, data transmission is convenient, the communication line is simple (two-way long-distance communication can be realized only by a pair of transmission lines), and the transmission cost can be effectively reduced.

The power supply 4 is provided with a transformation module 11, and the transformation module 11 comprises a toggle switch SW, a voltage stabilizer U2, a capacitor C17 and a capacitor C18; a pin 1 of the toggle switch SW is suspended; pin 2 of the toggle switch SW is connected with the power supply; pin 3 of the toggle switch SW is connected with pin 3 of the voltage stabilizer U2; pin 1 of the voltage stabilizer U2 is grounded; the 2 pins of the voltage stabilizer U2 are divided into two paths, one path outputs a 3.3V power supply outwards, and the other path is grounded through the capacitor C18; the 4 pins of the voltage stabilizer U2 are suspended; one end of the capacitor C17 is connected with a node of the pin 3 of the toggle switch SW and the pin 3 of the voltage regulator U2, and the other end of the capacitor C17 is grounded; in this embodiment, the voltage transformation module is configured to convert the power provided by the power module 11 into a 3.3V power, so as to provide a working power for the whole product.

The noise monitoring module 6 comprises a noise detector Pin4, wherein a Pin 1 of the noise detector Pin4 is grounded, a Pin 2 of the noise detector Pin4 is connected with a 5V power supply, a Pin 3 of the noise detector Pin4 is suspended, and a Pin4 of the noise detector Pin4 is connected with a Pin 10 of the master controller U1; in this embodiment, the noise detector Pin4 is internally provided with a microphone, a relay and a signal amplifier, the microphone is electrically connected with the signal amplifier, one end of the relay is electrically connected with the signal amplifier, the other end of the relay is electrically connected with the master controller U1 as an output end (i.e., 4 pins of the noise detector Pin 4), the microphone receives external environment noise, a sound signal is converted into an electric signal by the microphone, the signal is processed by the amplifier, when the signal exceeds a threshold value, the relay acts to transmit the signal to the master controller U1, and the master controller U1 transmits the signal to the liquid crystal display screen to display the decibel value of the sound.

An alarm module 12 is arranged on the base, the alarm module 12 comprises a resistor R9 and a light emitting diode LED1, the anode of the light emitting diode LED1 is connected with a 3.3V power supply through the resistor R9, and the cathode of the light emitting diode LED1 is connected with an 18 pin of the master controller U1; in this embodiment, when the electronic paper display panel 5 refreshes data once, the light emitting diode LED1 flashes once, and when the LED lamp does not work, it indicates that the electronic paper display panel 5 has a problem, so that a user can find a fault and repair the fault in time.

The above embodiments do not limit the scope of the present invention, and those skilled in the art can make equivalent modifications and variations without departing from the overall concept of the present invention.

Claims

1. The utility model provides a liquid crystal display based on electronic paper, includes liquid crystal display (1) and is used for the assembly base (2) of liquid crystal display (1), the inside of base (2) is provided with host system (3) and power supply (4), its characterized in that the back of base (2) is provided with electronic paper display panel (5), be provided with noise monitoring module (6) on base (2), host system (3) respectively with liquid crystal display (1), electronic paper display panel (5) and noise monitoring module (6) electricity are connected, power supply (4) are used for host system (3), liquid crystal display (1), electronic paper display panel (5) and noise monitoring module (6) provide working power supply.

2. The electronic paper-based liquid crystal display screen according to claim 1, wherein the electronic paper display panel (5) comprises an insulating substrate (7), an electronic paper display layer (8) and a touch screen layer (9), the electronic paper display layer (8) is covered on the surface of the insulating substrate (7), a transparent glass substrate (10) is arranged between the electronic paper display layer (8) and the touch screen layer (9), the touch screen layer (9) is covered on the surface of the transparent glass substrate (10), the back surface of the transparent glass substrate (10) is covered on the electronic paper display layer (8), and the electronic paper display layer (8) and the touch screen layer (9) are both electrically connected with the main control module (3).

3. The electronic paper-based liquid crystal display screen of claim 1, wherein the main control module comprises a main controller U1, a starting circuit, a crystal oscillator circuit, a reset circuit, a decoupling circuit, a download port J1 and a serial port J2; the main controller U1 is respectively electrically connected with the starting circuit, the crystal oscillator circuit, the reset circuit, the decoupling circuit, the download port J1 and the serial port J2.

4. The electronic paper based liquid crystal display as claimed in claim 1, characterized in that the power supply (4) is provided with a transforming module (11), the transforming module (11) comprising a toggle switch SW, a voltage regulator U2, a capacitor C17 and a capacitor C18; a pin 1 of the toggle switch SW is suspended; pin 2 of the toggle switch SW is connected with the power supply; pin 3 of the toggle switch SW is connected with pin 3 of the voltage stabilizer U2; pin 1 of the voltage stabilizer U2 is grounded; the 2 pins of the voltage stabilizer U2 are divided into two paths, one path outputs a 3.3V power supply outwards, and the other path is grounded through the capacitor C18; the 4 pins of the voltage stabilizer U2 are suspended; one end of the capacitor C17 is connected to the node between pin 3 of the toggle switch SW and pin 3 of the voltage regulator U2, and the other end is grounded.

5. The electronic paper based liquid crystal display screen of claim 3, wherein the noise monitoring module (6) comprises a noise detector Pin4, a 1 Pin of the noise detector Pin4 is grounded, a 2 Pin of the noise detector Pin4 is connected with a 5V power supply, a 3 Pin of the noise detector Pin4 is floating, and a 4 Pin of the noise detector Pin4 is connected with a 10 Pin of the master U1.

6. The electronic paper based liquid crystal display screen according to claim 3, wherein the base is provided with an alarm module (12), the alarm module (12) comprises a resistor R9 and a light emitting diode LED1, the anode of the light emitting diode LED1 is connected with a 3.3V power supply through the resistor R9, and the cathode of the light emitting diode LED1 is connected with the 18 pins of the master U1.

7. The liquid crystal display screen based on electronic paper as claimed in claim 2, characterised in that the surface of the touch screen layer (9) is covered with a protective layer (13).