CN109871111A - The electronic device of display and the application display - Google Patents
The electronic device of display and the application display Download PDFInfo
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- CN109871111A CN109871111A CN201711271200.0A CN201711271200A CN109871111A CN 109871111 A CN109871111 A CN 109871111A CN 201711271200 A CN201711271200 A CN 201711271200A CN 109871111 A CN109871111 A CN 109871111A
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Abstract
A kind of display connects a mainboard to establish communication connection, which includes a first interface and a display unit.The mainboard includes a second interface, which is electrically connected the first interface by a cable, by the way that leakage protection circuit is arranged between first interface and display unit, to detect whether cable between first interface and second interface meets VESA standard.The present invention also provides a kind of electronic devices of application display.So may make will not leak electricity between display and mainboard, ensure that normal power supply timing, and the risk of operating system can not be returned to from shutdown or sleep by avoiding mainboard.
Description
Technical field
The present invention relates to the electronic devices of a kind of display and the application display.
Background technique
Mainboard and display are to establish to communicate to connect by display interface (Display Port, DP) cable, however, working as DP
Cable does not meet Video Electronics Standards Association (Video Electronics Standards Association, VESA) standard
When, it will leak electricity between display and mainboard, will so interfere normal power supply timing, can not be waken up from shutdown or sleep
Operating system is returned to afterwards.
Summary of the invention
In view of above content, it is necessary to provide a kind of display and the electronic device using the display.
A kind of display, including first interface and display unit, the first interface pass through the second interface of cable and mainboard
It is connected, which includes the first idle pin, which includes the second idle pin for connecting the first power supply, this is aobvious
Show that device further includes leakage protection circuit, which includes:
Power supply control chip for receiving control signal, and according to the control signal conduction or disconnects this and first idle draws
Connection between foot and second source；
Switch unit, for receiving opening for the output of the public point between the first idle pin and the power supply control chip
OFF signal, and corresponding trigger signal is exported according to the switching signal；And
Chip is handled, for exporting the control signal with the first level within a preset time, which is also used to
The trigger signal is received, and judges whether according to the trigger signal level state for switching the control signal after preset time；
When the cable does not meet VESA standard, which is electrically connected with the second idle pin, the processing
Chip exports the control signal with the first level within a preset time, to control the first idle pin and the second source
Between disconnect, which exports first switch signal and exports the first trigger signal to control the switch unit, at this
Reason chip continues to output the control signal with the first level according to first trigger signal after preset time, should
It is disconnected between first idle pin and the second source.
Further, when the cable meets VESA standard, the first idle pin and the second idle pin disconnect and connecting
It connects, which exports the control signal with the first level within a preset time, to control the first idle pin and be somebody's turn to do
It is disconnected between second source, which exports second switch signal to control switch unit output the second triggering letter
Number, the processing chip is according to second trigger signal the control signal is switched to second by the first level after preset time
Level is connected between the first idle pin and the second source with being connected.
Further, when the processing chip receives first trigger signal, which exports alarm signal extremely
The display unit, to control display unit output information warning.
Further, the switch unit include an electronic switch, first resistor and second resistance, the first of the electronic switch
End is connected to the first idle pin of the first interface, the second end ground connection of the electronic switch, the electronics by the first resistor
The third end of switch is connected to the second source by the second resistance, and the third end of the electronic switch is additionally coupled to the processing core
Piece.
Further, which includes power supply output pin, power input pin, grounding pin, enables to draw
Foot, the power supply output pin of the power supply control chip are connected to the first idle pin of the first interface, the power supply control chip
Power input pin by the first inductance connection to the second source, the power input pin of the power supply control chip also passes through
First capacitor, the grounding pin ground connection of the power supply control chip, the enabled pin of the power supply control chip are connected to the processing core
Piece.
Further, which includes signal output pin, detecting pin, control pin, signal input pin, is somebody's turn to do
The signal output pin of processing chip connects the enabled pin of the power supply control chip, the detecting pin of the processing chip and control
Pin is connected to the display unit, and the signal input pin of the processing chip is connected to the third end of the electronic switch.
Further, which is N-type field-effect tube, and the first end of the electronic switch corresponds to the N-type field-effect
The grid of pipe, the second end of the electronic switch correspond to the source electrode of the N-type field-effect tube, and the third end of the electronic switch corresponds to
The drain electrode of the N-type field-effect tube.
Further, it is low level signal that this, which has the control signal of the first level, and there is the control of second electrical level to believe for this
Number be high level signal.
Further, the first interface and the second interface are a DP interface, which is a SOC chip.
A kind of electronic device, including mainboard, display and cable, the display include first interface and display unit, are somebody's turn to do
Mainboard includes second interface, which is connected by the cable with the second interface, which includes one first not busy
Pin is set, which includes the second idle pin for connecting the first power supply, which further includes leakage protection circuit, should
Leakage protection circuit includes:
Power supply control chip for receiving control signal, and according to the control signal conduction or disconnects this and first idle draws
Connection between foot and second source；
Switch unit, for receiving opening for the output of the public point between the first idle pin and the power supply control chip
OFF signal, and corresponding trigger signal is exported according to the switching signal；And
Chip is handled, for exporting the control signal with the first level within a preset time, which is also used to
The trigger signal is received, and judges whether according to the trigger signal level state for switching the control signal after preset time；
When the cable does not meet VESA standard, which is electrically connected with the second idle pin, the processing
Chip exports the control signal with the first level within a preset time, to control the first idle pin and the second source
Between disconnect, which exports first switch signal and exports the first trigger signal to control the switch unit, at this
Reason chip continues to output the control signal with the first level according to first trigger signal after preset time, should
It is disconnected between first idle pin and the second source.
The electronic device of aforementioned display device and the application display is leaked by being arranged between first interface and display unit
Electric protection circuit, to detect whether cable between first interface and second interface meets VESA standard.It so may make display
It will not leak electricity between device and mainboard, ensure that normal power supply timing, avoiding mainboard can not return to from shutdown or sleep
The risk of operating system.
Detailed description of the invention
Fig. 1 is the block diagram of the better embodiment of electronic device of the present invention.
Fig. 2 is the circuit diagram of the better embodiment of electronic device in Fig. 1.
Main element symbol description
Electronic device 100
Display 10
First interface 12
Leakage protection circuit 14
Display unit 16
Mainboard 20
Second interface 22
Cable 30
Switch unit 40
Power supply V1, V2
Power supply control chip U1
Handle chip U2
Electronic switch Q1
Resistance R1, R2
Capacitor C1, C2
Inductance L1, L2
The present invention that the following detailed description will be further explained with reference to the above drawings.
Specific embodiment
Fig. 1 and Fig. 2 is please referred to, in a preferred embodiment, a kind of electronic device 100 includes a display 10 and a mainboard
20, which connects the mainboard 20 to establish communication connection.
The display 10 includes a first interface 12, a leakage protection circuit 14 and a display unit 16.Wherein, the electric leakage
Protection circuit 14 is connected between the first interface 12 and the display unit 16.In the present embodiment, which is
One display screen.
The mainboard 20 includes a second interface 22, which is electrically connected the first interface by a cable 30
12。
The first interface 12 and the second interface 22 include an idle pin P20, which connects a power supply
V1.The leakage protection circuit 14 includes a power supply control chip U1, a processing chip U2 and a switch unit 40.
Power supply control chip U1 is connected between the idle pin P20 of first interface 12 and a power supply V2, for receiving
The control signal of processing chip U2 output, and according to the control signal conduction or disconnect the idle pin of the first interface 12
Connection between P20 and power supply V2.
The switch unit 40 is used to receive between the idle pin P20 and power supply control chip U1 of the first interface 12
The switching signal of public point P output, and corresponding trigger signal is exported according to the switching signal.
The processing chip U2 is used for the control signal that the output in preset time (such as 10ms) has the first level, the processing
Chip U2 receives the trigger signal, and judges whether according to the trigger signal level for switching the control signal after preset time
State.
When the cable 30 does not meet VESA standard, which leaves unused spare time of pin P20 and the second interface 22
Pin P20 electrical connection is set, processing chip U2 exports the control signal with the first level within a preset time, should with control
First interface 12 leaves unused and disconnects between pin P20 and power supply V2, and public point P output switching signal is opened with controlling this
It closes unit 40 and exports the first trigger signal, which continues to output this after preset time according to first trigger signal
Control signal with the first level will disconnect between the idle pin P20 and power supply V2 of the first interface 12.
When the cable 30 meets VESA standard, which leaves unused the idle of pin P20 and the second interface 22
Pin P20 is disconnected, and processing chip U2 exports the control signal with the first level within a preset time, should with control
First interface 12 leaves unused and disconnects between pin P20 and power supply V2, and public point P output switching signal is opened with controlling this
Close unit 40 export the second trigger signal, the processing chip U2 according to second trigger signal with after preset time by the control
Signal is switched to second electrical level by the first level, between the idle pin P20 and power supply V2 the first interface 12 is connected
Connection.
In one embodiment, it is low level signal that this, which has the control signal of the first level, this has second electrical level
Control signal be high level signal.
In one embodiment, power supply control chip U1 include power supply output pin OUT, power input pin IN,
Grounding pin GND, enabled pin EN.Processing chip U2 includes signal output pin Power_EN, detecting pin Detect_
EN, control pin Display, signal input pin Alert_N.
The power supply output pin OUT of power supply control chip U1 is connected to the idle pin P20 of the first interface 12, the electricity
The power input pin IN of source control chip U1 is connected to the first power supply V1, the electricity of power supply control chip U1 by an inductance L1
Source input pin IN also passes through capacitor C1 ground connection.The grounding pin GND of power supply control chip U1 is grounded, which controls core
The enabled pin EN of piece U1 is connected to processing chip U2.
The signal output pin Power_EN of processing chip U2 connects the enabled pin EN of power supply control chip U1, should
The detecting pin Detect_EN and control pin Display for handling chip U2 are connected to the display unit 16.
The switch unit 40 includes electronic switch Q1, resistance R1, resistance R2, and the first end of electronic switch Q1 passes through the electricity
Resistance R1 is connected to the idle pin P20 of the first interface 12, the second end ground connection of electronic switch Q1, and the of electronic switch Q1
By being connected to power supply V1 by resistance R2, the third end of electronic switch Q1 is additionally coupled to processing chip U2's at three ends
Signal input pin Alert_N.
The idle pin P20 of the second interface 22 is connected to a second source V2 by an inductance L2, and passes through a capacitor
C2 ground connection.
In one embodiment, electronic switch Q1 is N-type field-effect tube.The first end of electronic switch Q1 corresponds to
The grid of the N-type field-effect tube, the second end of electronic switch Q1 correspond to the source electrode of the N-type field-effect tube, the electronic switch
The third end of Q1 corresponds to the drain electrode of the N-type field-effect tube.
In one embodiment, the first interface 12 and the second interface 22 are a DP interface.Processing chip U2
For a SOC (System-on-a-Chip) chip.Power supply V1, power supply V2 are used to output 3.3V voltage.
In one embodiment, which further comprises several signal pins (not shown), this second connects
Mouth 22 further comprises several signal pins (not shown), and several signal pins in the first interface 12 are right by the cable 30
Several signal pins in the second interface 22 should be connected.
Wherein, when the first interface 12 connects the second interface 22 by the cable 30, if the cable 30 is not met
VESA standard, the idle pin P20 of the first interface 12 and the idle pin P20 of the second interface 22 are electrically connected；Such as line
Cable 30 meets VESA standard, and the idle pin P20 of the first interface 12 and the idle pin P20 of the second interface 22 are disconnected and being connected
It connects.
In use, the electronic device 100 accesses an AC power source (not shown), which is powered on, processing chip U2
Detecting pin Detect_EN will receive from the display unit 16 output low level detection signal, the processing core
The signal output pin Power_EN of piece U2 will export low level control signal to the power supply control chip within a preset time
The enabled pin EN of U1, so that power supply control chip U1 is in off state.At this point, the idle pin of the first interface 12
It is disconnected between P20 and power supply V2.
When the cable 30 meets VESA standard, the spare time of idle the pin P20 and the second interface 22 of the first interface 12
Pin P20 is set to disconnect.The voltage of the first end of electronic switch Q1 becomes 0V from 3.3V, electronic switch Q1 cut-off.It should
The signal input pin Alert_N of processing chip U2 receives the trigger signal from the power supply V2 high level exported, the processing
Chip U2 can determine whether that the cable 30 meets VESA standard according to the trigger signal of the high level received.It, should after preset time
Processing chip U2 will export enabled pin EN of the control signal of high level to power supply control chip U1, the power supply control chip
U1 is in the conductive state, in this way, the normal connection between the idle pin P20 and power supply V2 of the first interface 12.At this point, should
Normal communication between display 10 and the mainboard 20.
When the cable 30 does not meet VESA standard, idle pin P20 and the second interface 22 of the first interface 12
Idle pin P20 is electrically connected, and the 3.3V voltage of power supply V1 output will pass through the idle pin P20 of first interface 12 and the
The idle pin P20 of two interfaces 22 is transmitted to public point P, and electronic switch Q1 receives opening for public point P output
OFF signal, electronic switch Q1 conducting, the signal input pin Alert_N of processing chip U2 are grounded and receive switch unit
The low level trigger signal of 40 outputs, the processing chip U2 can determine whether the cable according to the low level trigger signal received
30 do not meet VESA standard.After preset time, processing chip U2 will export low level control signal to the power supply and control
The enabled pin EN of chip U1, so that power supply control chip U1 is in off state, the idle pin of the first interface 12
It is disconnected between P20 and power supply V2, so that the voltage that power supply V2 is exported will not flow to the mainboard 20.
Meanwhile the control pin Display of processing chip U2 exports alarm signal to the display unit 16.The display list
Alarm signal exports information warning (as shown one section of warning text) to member 16 based on the received, to prompt user to replace in time
Fall not meeting the cable 30 of VESA standard.
The electronic device 100 of aforementioned display device 10 and the application display 10 passes through in first interface 12 and display unit 16
Between the leakage protection circuit 14 is set, with detect cable between first interface 12 and second interface 22 whether meet VESA mark
It is quasi-.So may make and will not leak electricity between display 10 and mainboard 20, ensure that normal power supply timing, avoid mainboard without
Method returns to the risk of operating system from shutdown or sleep.
Finally it should be noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.This field
It is to be appreciated by one skilled in the art that can modify to technical solution of the present invention or equivalent replacement, without departing from the present invention
The spirit and scope of technical solution.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creativeness
Every other embodiment obtained, will all belong to the scope of protection of the invention under the premise of labour.
Claims (10)
1. a kind of display, including first interface and display unit, which passes through the second interface phase of cable and mainboard
Even, which includes the first idle pin, which includes the second idle pin for connecting the first power supply, feature
It is, which further includes leakage protection circuit, which includes:
Power supply control chip, for receive control signal, and according to the control signal conduction or disconnect the first idle pin and
Connection between second source；
Switch unit, for receiving the switch letter of the output of the public point between the first idle pin and the power supply control chip
Number, and corresponding trigger signal is exported according to the switching signal；And
Chip is handled, for exporting the control signal with the first level within a preset time, which is also used to receive
The trigger signal, and judge whether according to the trigger signal level state for switching the control signal after preset time；
When the cable does not meet VESA standard, which is electrically connected with the second idle pin, the processing chip
The control signal with the first level is exported, within a preset time to control between the first idle pin and the second source
It disconnects, which exports first switch signal and export the first trigger signal, the processing core to control the switch unit
Piece continued to output after preset time according to first trigger signal this have the first level control signal, by this first
It is disconnected between idle pin and the second source.
2. display as described in claim 1, which is characterized in that when the cable meets VESA standard, this first idle draws
Foot is disconnected with the second idle pin, which exports the control signal with the first level within a preset time,
It is disconnected between the first idle pin and the second source with controlling, which exports second switch signal to control
The switch unit export the second trigger signal, the processing chip according to second trigger signal with after preset time by the control
Signal is switched to second electrical level by the first level, is connected between the first idle pin and the second source with being connected.
3. display as described in claim 1, which is characterized in that when the processing chip receives first trigger signal,
The processing chip exports alarm signal to the display unit, to control display unit output information warning.
4. display as claimed in claim 3, which is characterized in that the switch unit include an electronic switch, first resistor and
Second resistance, the first end of the electronic switch are connected to the first idle pin of the first interface, the electricity by the first resistor
The second end of sub switch is grounded, and the third end of the electronic switch is connected to the second source by the second resistance, the electronic cutting
The third end of pass is additionally coupled to the processing chip.
5. display as claimed in claim 4, which is characterized in that the power supply control chip includes power supply output pin, power supply
Input pin, grounding pin, enabled pin, the power supply output pin of the power supply control chip are connected to the first of the first interface
The power input pin of idle pin, the power supply control chip passes through the first inductance connection to the second source, power supply control
The power input pin of chip also passes through first capacitor, the grounding pin ground connection of the power supply control chip, the power supply control chip
Enabled pin be connected to the processing chip.
6. display as claimed in claim 5, which is characterized in that the processing chip include signal output pin, detecting pin,
Pin, signal input pin are controlled, the signal output pin of the processing chip connects the enabled pin of the power supply control chip, should
The detecting pin and control pin for handling chip are connected to the display unit, and the signal input pin of the processing chip is connected to
The third end of the electronic switch.
7. display as claimed in claim 4, which is characterized in that the electronic switch is N-type field-effect tube, the electronic switch
First end corresponds to the grid of the N-type field-effect tube, and the second end of the electronic switch corresponds to the source electrode of the N-type field-effect tube,
The third end of the electronic switch corresponds to the drain electrode of the N-type field-effect tube.
8. display as claimed in claim 2, which is characterized in that this has the control signal of the first level for low level letter
Number, it is high level signal that this, which has the control signal of second electrical level,.
9. display as described in claim 1, which is characterized in that the first interface and the second interface are a DP interface,
The processing chip is a SOC chip.
10. a kind of electronic device, including mainboard, display and cable, which includes first interface and display unit, the master
Plate includes second interface, which is connected by the cable with the second interface, which includes one first idle
Pin, the second interface include the second idle pin for connecting the first power supply, which is characterized in that the display further includes that electric leakage is protected
Protection circuit, the leakage protection circuit include:
Power supply control chip, for receive control signal, and according to the control signal conduction or disconnect the first idle pin and
Connection between second source；
Switch unit, for receiving the switch letter of the output of the public point between the first idle pin and the power supply control chip
Number, and corresponding trigger signal is exported according to the switching signal；And
Chip is handled, for exporting the control signal with the first level within a preset time, which is also used to receive
The trigger signal, and judge whether according to the trigger signal level state for switching the control signal after preset time；
When the cable does not meet VESA standard, which is electrically connected with the second idle pin, the processing chip
The control signal with the first level is exported, within a preset time to control between the first idle pin and the second source
It disconnects, which exports first switch signal and export the first trigger signal, the processing core to control the switch unit
Piece continued to output after preset time according to first trigger signal this have the first level control signal, by this first
It is disconnected between idle pin and the second source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711271200.0A CN109871111B (en) | 2017-12-05 | 2017-12-05 | Display and electronic device using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711271200.0A CN109871111B (en) | 2017-12-05 | 2017-12-05 | Display and electronic device using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109871111A true CN109871111A (en) | 2019-06-11 |
| CN109871111B CN109871111B (en) | 2022-07-05 |
Family
ID=66916763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711271200.0A Active CN109871111B (en) | 2017-12-05 | 2017-12-05 | Display and electronic device using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109871111B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113163237A (en) * | 2020-01-22 | 2021-07-23 | 海信视像科技股份有限公司 | Display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070236481A1 (en) * | 2006-04-05 | 2007-10-11 | Aten International Co., Ltd. | On-screen display system |
| US20110191605A1 (en) * | 2010-02-04 | 2011-08-04 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Time sequence control circuit |
| CN103901996A (en) * | 2012-12-28 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Computer system |
| CN105098406A (en) * | 2014-04-30 | 2015-11-25 | 鸿富锦精密工业(武汉)有限公司 | Wire end connector |
-
2017
- 2017-12-05 CN CN201711271200.0A patent/CN109871111B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070236481A1 (en) * | 2006-04-05 | 2007-10-11 | Aten International Co., Ltd. | On-screen display system |
| US20110191605A1 (en) * | 2010-02-04 | 2011-08-04 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Time sequence control circuit |
| CN103901996A (en) * | 2012-12-28 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Computer system |
| CN105098406A (en) * | 2014-04-30 | 2015-11-25 | 鸿富锦精密工业(武汉)有限公司 | Wire end connector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113163237A (en) * | 2020-01-22 | 2021-07-23 | 海信视像科技股份有限公司 | Display device |
| CN113163237B (en) * | 2020-01-22 | 2023-03-03 | 海信视像科技股份有限公司 | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109871111B (en) | 2022-07-05 |
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