CN112614469B

CN112614469B - Electronic device, driving apparatus, power supply, and electronic apparatus

Info

Publication number: CN112614469B
Application number: CN202011551342.4A
Authority: CN
Inventors: 苏嘉伟; 王磊中; 林立堂
Original assignee: Chipone Technology Beijing Co Ltd
Current assignee: Chipone Technology Beijing Co Ltd
Priority date: 2020-12-24
Filing date: 2020-12-24
Publication date: 2022-05-20
Anticipated expiration: 2040-12-24
Also published as: CN112614469A

Abstract

The present disclosure relates to an electronic device, a driving apparatus, a power supply, and an electronic apparatus, the device including: the driving module comprises a plurality of output channels and is used for outputting multi-channel control signals to drive the display panel; the discharging module is electrically connected to the driving module and is used for: the method comprises the steps of detecting power supply voltage of the driving module, controlling the power supply voltage to accelerate power failure when the power supply voltage is reduced to a first reference voltage, and controlling the output channels to be in short circuit to accelerate the power failure of the output channels when the power supply voltage is reduced to a second reference voltage, wherein the potential of the first reference voltage is higher than that of the second reference voltage. Through the device, the power-off speed can be increased in the embodiment of the disclosure, so that the display panel is prevented from generating ghost images when the power-off is performed, and the picture quality is improved.

Description

Electronic device, driving apparatus, power supply, and electronic apparatus

Technical Field

The present disclosure relates to display technologies, and in particular, to an electronic device, a driving apparatus, a power supply, and an electronic apparatus.

Background

With the development of technology, the living standard of people is continuously improved, and various types of electronic devices with display function are more and more favored, however, the current display panel has a problem on the driving module, when the power of the display panel of the electronic device is turned off, if the power is turned off slowly, the discharging operation of the driving current and/or the driving voltage of the driving module is delayed, which may cause the shutdown afterimage of the display panel in the shutdown process.

Disclosure of Invention

In view of this, the present disclosure provides an electronic apparatus, a driving device, a power supply and an electronic device, so as to prevent a display panel from generating a residual image when the display panel is turned off and improve a picture quality.

According to an aspect of the present disclosure, an electronic device is presented, the device comprising:

the driving module comprises a plurality of output channels and is used for outputting multi-channel control signals to drive the display panel;

the discharging module is electrically connected to the driving module and is used for:

detecting a power supply voltage of the driving module, controlling the power supply voltage to accelerate power down when the power supply voltage is reduced to a first reference voltage, controlling the plurality of output channels to be in short circuit to accelerate power down of the plurality of output channels when the power supply voltage is reduced to a second reference voltage,

wherein a potential of the first reference voltage is higher than a potential of the second reference voltage.

In one possible embodiment, the discharge module includes a first comparison unit, a second comparison unit, a first resistance unit, a second resistance unit, a first switch unit, and a second switch unit, wherein,

a first input end of the first comparing unit is used for inputting the power voltage, a second input end of the first comparing unit is used for inputting the first reference voltage, an output end of the first comparing unit is electrically connected to a control end of the first switching unit, an output end of the first comparing unit is used for outputting a first control signal when the power voltage is reduced to the first reference voltage, and the first control signal is used for controlling the first switching unit to be conducted,

the first end of the first switch unit is used for inputting the power supply voltage, the second end of the first switch unit is electrically connected to the first end of the second comparison unit and the first end of the first resistance unit, the second end of the first resistance unit is grounded,

the second end of the second comparing unit is used for receiving the second reference voltage, the output end of the second comparing unit is electrically connected to the control end of the second switching unit, the output end of the second comparing unit is used for outputting a second control signal when the power voltage is reduced to the second reference voltage,

the second switch unit is used for being conducted when the second control signal is received, enabling the plurality of output channels of the driving module to be in short circuit, and accelerating the power failure of the plurality of output channels through the second resistance unit.

In one possible embodiment, the first comparing unit comprises a first comparator, the second comparing unit comprises a second comparator, the first resistance unit comprises a first resistance, the second resistance unit comprises a second resistance, the first switching unit comprises a first switch, the second switching unit comprises a second switch and a plurality of third switches, wherein,

the control end of the second switch and the control end of each third switch are electrically connected with the output end of the second comparison unit, each third switch is electrically connected between the two output channels of the driving module, and each third switch is electrically connected in sequence,

a first end of the second switch is electrically connected to one of the output channels, a second end of the second switch is electrically connected to a first end of the second resistor,

the first end of the second resistor is grounded,

when the second comparison unit outputs the second control signal to the control ends of the second switch and each third switch, the second switch and each third switch are turned on, and the plurality of output channels are shorted to the first end of the second resistor.

In one possible implementation, the driving module includes a source driving circuit, and the source driving circuit is configured to drive sources of the transistors in the display panel.

In one possible implementation, the driving module includes a gate driving circuit, and the gate driving circuit is configured to drive gates of transistors in the display panel.

In one possible implementation, the driving module includes a timing control circuit for inputting a signal and outputting source driving data.

In one possible embodiment, the display panel includes at least one of a liquid crystal display panel, an organic light emitting diode display panel, a quantum dot light emitting diode display panel, a mini light emitting diode display panel, and a micro light emitting diode display panel.

According to another aspect of the present disclosure, a driving apparatus is provided, which includes the electronic device.

According to another aspect of the present disclosure, a power supply is provided, the power supply comprising the driving apparatus.

According to another aspect of the present disclosure, an electronic device is provided, which includes the power supply.

Through above device, this disclosed embodiment can detect drive module's mains voltage works as when mains voltage reduces first reference voltage, control mains voltage falls with higher speed and falls, when this mains voltage reduces second reference voltage, controls a plurality of output channel short circuits are in order to accelerate a plurality of output channel fall the electricity for shutdown speed, thereby avoid display panel ghost to appear when the shutdown, improve the picture quality, and this disclosed embodiment's drive arrangement uses elasticity height, applicable in multiple display device.

Other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.

FIG. 1 shows a block diagram of an electronic device according to an embodiment of the present disclosure.

Fig. 2 shows a schematic view of a drive device according to an embodiment of the present disclosure.

Fig. 3 shows a schematic view of a drive arrangement according to an embodiment of the present disclosure.

Fig. 4 shows a schematic diagram of accelerated power down of a drive apparatus according to an embodiment of the present disclosure.

Detailed Description

Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.

Referring to fig. 1, fig. 1 is a block diagram of an electronic device according to an embodiment of the disclosure.

As shown in fig. 1, the apparatus includes:

a driving module 13 including a plurality of output channels for outputting a plurality of control signals to drive the display panel 11;

a discharge module 12 electrically connected to the driving module 13, for:

detecting the power supply voltage of the driving module 12, controlling the power supply voltage to accelerate power down when the power supply voltage is reduced to a first reference voltage, and controlling the plurality of output channels to be in short circuit to accelerate power down of the plurality of output channels when the power supply voltage is reduced to a second reference voltage, wherein the potential of the first reference voltage is higher than that of the second reference voltage.

In one possible embodiment, the Display panel includes any one or more of an LCD (Liquid Crystal Display) Display panel, an LED (Light Emitting Diode) Display panel, a MiniLED (Mini Light Emitting Diode) Display panel, a Micro LED (Micro Light Emitting Diode) Display panel, an OLED (Organic Light-Emitting Diode) Display panel, and a quantum dot Light Emitting Diode Display panel.

The driving apparatus may be applied to an electronic device, which may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), and the like, and is a device that provides voice and/or data connectivity to a user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and the like. Currently, some examples of terminals are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self), a wireless terminal in remote operation (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety, a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), a wireless terminal in car networking, a sound box, a smart wearable device, a digital camera, mp3, mp4, a broadband router, an electronic book, a switch, a cat, an ndp, a PSs 3, a PS 3832, a box, etc., and may also include a digital computer, such as a satellite dish, and a computer, A BIOS of a printer, a BIOS of a graphics card, a mouse, a display, an optical drive, a hard disk, a keyboard, a GPS terminal, a precision electronic instrument (such as a nuclear magnetic resonance instrument), and the like.

In one possible implementation, the driving module may include a source driving circuit for driving sources of the respective transistors in the display panel.

In one example, the source driving circuit may include a shift register, a data latch, a digital-to-analog converter, and a plurality of output channels, the plurality of output channels being connected to sources of respective transistors (pixel units) of the display panel, wherein the shift register may output a plurality of pulse signals according to a clock signal, so that display data of a data bus in the source driving circuit are sequentially stored in the data latch, the data latch is used to store the data, and the data is inverted, and the digital-to-analog converter may generate a gray scale voltage representing a gray scale level according to a power supply voltage and a logic signal, and output the gray scale voltage to a source of a corresponding transistor through the output channel, so that the respective transistors display according to the corresponding gray scale level.

It should be noted that the above description of the source driving circuit is exemplary and should not be considered as a limitation to the embodiments of the present disclosure, and in other embodiments, the source driving circuit may include other devices, or may directly use any existing source driver.

In a possible implementation manner, the driving module may further include a gate driving circuit, and the gate driving circuit is configured to drive gates of the transistors in the display panel.

In one example, the gate driving circuit may further be integrated in the driving module, and in one example, the gate driving circuit may include a plurality of stages of shift registers connected in series, where each stage of shift register may output a gate driving signal of a current stage according to a clock signal, and turn on each transistor in a corresponding pixel column by using the gate driving signal, so that each pixel transistor in the pixel column can write display data.

It should be noted that the above description of the gate driving circuit is exemplary and should not be considered as a limitation to the embodiments of the present disclosure, and in other embodiments, the gate driving circuit may include other devices, and any existing gate driver may be directly used.

In one possible implementation, the driving module may further include a timing control circuit for inputting a signal and outputting source driving data.

In one example, a timing control circuit may be further integrated in the driving module, and the timing control circuit may generate source driving data according to an input video signal or a picture signal to be displayed on the display panel and output the source driving data to the source driving circuit.

It should be noted that the above description of the timing control circuit is exemplary and should not be considered as a limitation to the embodiments of the present disclosure, and in other embodiments, the timing control circuit may include other devices, or may directly use any existing timing controller.

The embodiment of the present disclosure does not limit the specific implementation manner of the driving module, and those skilled in the art can implement the driving module by using a driving chip and a driving circuit in the related art.

Referring to fig. 2, fig. 2 is a schematic diagram illustrating a driving apparatus according to an embodiment of the disclosure.

In one possible implementation, as shown in fig. 2, the discharging module includes a first comparing unit 127, a second comparing unit 122, a first resistance unit 125, a second resistance unit 121, a first switching unit 126, and a second switching unit 124, wherein,

a first input terminal of the first comparing unit 127 is configured to input the power voltage Vs, a second input terminal of the first comparing unit 127 is configured to input the first reference voltage Vref1, an output terminal of the first comparing unit 127 is electrically connected to a control terminal of the first switching unit 126, an output terminal of the first comparing unit 127 is configured to output a first control signal En1 when the power voltage Vs drops to a first reference voltage Vref1, the first control signal En1 is configured to control the first switching unit 126 to be turned on,

a first end of the first switch unit 126 is configured to input the power voltage Vs, a second end of the first switch unit 126 is electrically connected to the first end of the second comparing unit 122 and the first end of the first resistor unit 125, a second end of the first resistor unit 125 is grounded,

a second terminal of the second comparing unit 122 is configured to receive the second reference voltage Vref2, an output terminal of the second comparing unit 122 is electrically connected to the control terminal of the second switching unit 124, an output terminal of the second comparing unit 122 is configured to output a second control signal En2 when the power voltage Vs drops to the second reference voltage Vref2,

the second switch unit 122 is configured to be turned on when receiving the second control signal En2, short the output channels of the driving module, and accelerate power down of the output channels through the second resistance unit 121.

Referring to fig. 3, fig. 3 is a schematic diagram illustrating a driving apparatus according to an embodiment of the disclosure.

In one possible implementation, as shown in fig. 3, the first comparing unit includes a first comparator, the second comparing unit includes a second comparator, the first resistance unit includes a first resistor 125, the second resistance unit includes a second resistor 121, the first switch unit includes a first switch 126, the second switch unit includes a second switch 124 and a plurality of third switches 123, wherein,

the control end of the second switch 124 and the control end of each third switch 123 are electrically connected to the output end of the second comparing unit, each third switch 123 is electrically connected between the two output channels 12S of the driving module, and each third switch 123 is electrically connected in sequence,

a first end of the second switch 124 is electrically connected to one of the output channels 12S, a second end of the second switch 124 is electrically connected to a first end of the second resistor 121,

a first terminal of the second resistor 121 is connected to ground,

when the second comparing unit outputs the second control signal En2 to the control terminals of the second switch 124 and each third switch 123, the second switch 124 and each third switch 123 are turned on, and the plurality of output channels 12S are shorted to the first terminal of the second resistor 121.

Referring to fig. 4, fig. 4 is a schematic diagram illustrating accelerated power down of a driving apparatus according to an embodiment of the present disclosure.

In one example, as shown in fig. 4, when the display panel starts to be powered off, the power voltage Vs starts to decrease, and generally, only when the power voltage decreases to the second reference voltage Vref2, the channels of the driving module can be shorted to enter the discharging procedure of the channels, as shown by the line 21, and only when the time t3 is reached, the discharging procedure is started in the related art.

In one example, as shown in fig. 4, when the power voltage Vs of the embodiment of the disclosure drops to the first reference voltage Vref1 at time t1, the first comparing unit generates the first control signal En1 to turn on the first switch 126, so that the power voltage Vs is rapidly discharged through the first resistor 125, as shown by the line 22, and when the power voltage Vs drops to the first reference voltage Vref1, the power voltage Vs drops rapidly (relative to the line 21).

In one example, as shown in fig. 4, the power voltage may drop to the potential of the second reference voltage Vref2 at time t2 (line 22), and compared with the related art that the power voltage may drop to the second reference voltage Vref2 only at time t3 (line 21), the embodiment of the present disclosure advances the time from Tg 3 to t2, so as to greatly accelerate the time for discharging, and when the power voltage drops to the potential of the second reference voltage Vref2 at time t2, the second comparing unit outputs the second control signal En2 to control the second switching unit to conduct, short-circuit the channels of the driving module together, and accelerate the starting process through the second resistor 121.

Through the device, this disclosed embodiment realizes the shutdown detection through the change of listening mains voltage, when mains voltage reduces first reference voltage, controls mains voltage falls the power failure with higher speed, when this mains voltage reduces second reference voltage, controls a plurality of output channel short circuits are in order to accelerate a plurality of output channel fall the power failure for shutdown speed to avoid display panel ghost to appear when the shutdown, improve picture quality.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. An electronic device, the device comprising:

the driving module comprises a plurality of output channels and is used for outputting a plurality of paths of control signals so as to drive the display panel;

wherein the first reference voltage is higher than the second reference voltage, the discharging module comprises a first comparing unit, a second comparing unit, a first resistance unit, a second resistance unit, a first switch unit, and a second switch unit,

2. The apparatus of claim 1, wherein the first comparing unit comprises a first comparator, the second comparing unit comprises a second comparator, the first resistance unit comprises a first resistance, the second resistance unit comprises a second resistance, the first switching unit comprises a first switch, the second switching unit comprises a second switch and a plurality of third switches, wherein,

the first end of the second resistor is grounded,

3. The apparatus of claim 1, wherein the driving module comprises a source driving circuit for driving sources of the transistors in the display panel.

4. The apparatus of claim 3, wherein the driving module comprises a gate driving circuit for driving gates of the transistors in the display panel.

5. The apparatus of claim 3, wherein the driving module comprises a timing control circuit for inputting signals and outputting source driving data.

6. The apparatus of claim 1, wherein the display panel comprises at least one of a liquid crystal display panel, an organic light emitting diode display panel, a quantum dot light emitting diode display panel, a mini light emitting diode display panel, and a micro light emitting diode display panel.

7. A drive device, characterized in that it comprises an electronic apparatus according to any of claims 1-6.

8. A power supply characterized in that it comprises a drive device according to claim 7.

9. An electronic device, characterized in that the electronic device comprises a power supply according to claim 8.