CN109448621A - A kind of driving circuit and display device - Google Patents
A kind of driving circuit and display device Download PDFInfo
- Publication number
- CN109448621A CN109448621A CN201811222539.6A CN201811222539A CN109448621A CN 109448621 A CN109448621 A CN 109448621A CN 201811222539 A CN201811222539 A CN 201811222539A CN 109448621 A CN109448621 A CN 109448621A
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- signal
- voltage
- time
- sequence control
- power management
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- 238000001514 detection method Methods 0.000 claims abstract description 40
- 239000004065 semiconductor Substances 0.000 claims description 20
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 14
- 230000005611 electricity Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The present invention provides a kind of driving circuit and display device, which includes: power management module, for providing supply voltage；Time-sequence control module is electrically connected by connecting line and the power management module, and the time-sequence control module is used to receive the supply voltage by the connecting line, obtains receiving voltage；Detection module is electrically connected with the power management module and the time-sequence control module respectively, and whether the loss voltage for detecting on the connecting line is greater than preset threshold, obtains testing result, and generate control signal according to the testing result；Wherein when detecting that the loss voltage is greater than preset threshold, the time-sequence control module is also used to be adjusted according to the supply voltage that the control signal provides the power management module.Driving circuit and display device of the invention can be avoided the excessive damage time-sequence control module of voltage of power management chip input.
Description
[technical field]
The present invention relates to field of display technology, more particularly to a kind of driving circuit and display device.
[background technique]
With the development of display panel, section driving circuit is integrated on display panel, such as time-sequence control module
(TCON), since TCON needs the power management module outside panel to provide power supply, and since PMIC output end and TCON input
Cabling between end is longer, larger so as to cause resistance, and then causes voltage loss larger, so that the electricity that TCON is an actually-received
Pressure is less than voltage actually required, so that TCON can not work normally.
For example, TCON required voltage is 1.1V, if PMIC output voltage is 1.1V, the voltage of TCON input terminal
May there was only 0.8V.Existing mode is by way of increasing the voltage of PMIC output end, and to make up loss, for example PMIC is defeated
The voltage of outlet is improved to 1.4V, even if in normal work, the voltage of the input terminal of TCON reaches 1.1V, but due to being switched on
Moment, the voltage of TCON input terminal may be more than 1.4V, to be easily damaged TCON.
Therefore, it is necessary to a kind of driving circuit and display device be provided, to solve the problems of prior art.
[summary of the invention]
The purpose of the present invention is to provide a kind of driving circuit and display devices, can reduce time-sequence control module damage
Risk.
In order to solve the above technical problems, the present invention provides a kind of driving circuit comprising:
Power management module, for providing supply voltage；
Time-sequence control module is electrically connected by connecting line and the power management module, and the time-sequence control module is used
In receiving the supply voltage by the connecting line, obtain receiving voltage；
Detection module is electrically connected, for detecting respectively with the power management module and the time-sequence control module
Whether the loss voltage stated on connecting line is greater than preset threshold, obtains testing result, and generate and control according to the testing result
Signal；
Wherein when detecting that the loss voltage is greater than preset threshold, the time-sequence control module is also used to according to
The supply voltage that control signal provides the power management module is adjusted, so that the reception electricity of the time-sequence control module
Pressure is equal to predeterminated voltage.
In driving circuit of the invention, when the detection module detect the loss voltage on the connecting line be less than or
Equal to the preset threshold, the level of the control signal is high level；
When the detection module detects that the loss voltage on the connecting line is greater than the preset threshold, the control letter
Number level be low level.
In driving circuit of the invention, when the level of the control signal is low level, the time-sequence control module
Specifically for generating adjustment signal according to the control signal, the power management module is provided according to the adjustment signal
Supply voltage is adjusted.
In driving circuit of the invention, when the level of the control signal is low level, the time-sequence control module
Specifically for increasing the supply voltage that the power management module provides according to the adjustment signal.
In driving circuit of the invention, the detection module includes detection unit and signal generation unit, the detection
Unit is electrically connected with the power management module and the time-sequence control module respectively, and the detection unit is described for detecting
Whether the loss voltage on connecting line is greater than preset threshold, obtains testing result；
The signal generation unit is connect with the detection unit and the time-sequence control module respectively, and the signal generates
Unit is used to generate control signal according to the testing result.
In driving circuit of the invention, the power management module includes the first output end and feedback input end, described
Time-sequence control module includes first input end, detection signal input part and feedback output end；First output end and described the
The connection of one input terminal, the feedback output end are connect with the feedback input end；
The detection unit includes photo-coupler, and the photo-coupler has anode, cathode, emitter and collector；Institute
It states anode to connect with first output end, the cathode is connect with the first input end, the emitter and the signal
Unit connection is generated, the collector accesses constant pressure high level signal.
In driving circuit of the invention, the signal generation unit includes metal-oxide-semiconductor and first resistor；
The grid of the metal-oxide-semiconductor is connect with the emitter, the source electrode ground connection of the metal-oxide-semiconductor, the drain electrode point of the metal-oxide-semiconductor
It is not connect with one end of the detection signal input part and the first resistor；The other end access constant pressure of the first resistor is high
Level signal.
In driving circuit of the invention, the signal generation unit further includes second resistance, and the one of the second resistance
End is connect with the grid of the emitter and the metal-oxide-semiconductor respectively, the other end ground connection of the second resistance.
In driving circuit of the invention, the metal-oxide-semiconductor is N-channel MOS pipe.
The present invention provides a kind of display device comprising above-mentioned driving circuit.
Driving circuit and display device of the invention detects whether the loss voltage on connecting line is greater than by detection module
Preset threshold obtains testing result, and generates control signal according to the testing result, and time-sequence control module is according to the control
The supply voltage that signal provides the power management module is adjusted, so that the reception voltage etc. of the time-sequence control module
Timing is reduced due to the supply voltage according to the loss voltage adjustment power management module on connecting line in predeterminated voltage
The risk of control module damage.
[Detailed description of the invention]
Fig. 1 is the structural schematic diagram of driving circuit of the invention.
[specific embodiment]
The explanation of following embodiment is to can be used to the particular implementation of implementation to illustrate the present invention with reference to additional schema
Example.The direction term that the present invention is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outside", " side "
Deng being only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand the present invention, rather than to
The limitation present invention.The similar unit of structure is to be given the same reference numerals in the figure.
Fig. 1 is please referred to, Fig. 1 is the structural schematic diagram of driving circuit of the invention.
As shown in Figure 1, driving circuit of the invention includes power management module 10, detection module 20 and timing control mould
Block 30；
Power management module 10 provides supply voltage to time-sequence control module 30；The power management module 10 includes first
Output end 11 and feedback input end 15.Power management module 10 further includes the first power input；First power input is defeated
Enter to have constant pressure high level signal VDD.
Time-sequence control module 30 is electrically connected by connecting line 111 and the power management module 30, the connecting line
Equivalent resistance is R1.Time-sequence control module 30 includes second source input terminal；Second source input terminal input has the high electricity of constant pressure
Ordinary mail VDD.
Detection module 20 is electrically connected with the power management module 10 and the time-sequence control module 20 respectively, detects mould
Whether the loss voltage that block 20 is used to detect on the connecting line 111 is greater than preset threshold, obtains testing result, and according to described
Testing result generates control signal, and the control signal is inputted the time-sequence control module 30 later.
The time-sequence control module 30 receives the supply voltage by the connecting line 111, obtains receiving voltage；Namely
It receives voltage and is less than or equal to supply voltage.
Wherein when detecting that the loss voltage is greater than preset threshold, the time-sequence control module 30 is according to the acquisition
To control signal supply voltage that the power management module 10 is provided be adjusted so that the time-sequence control module 30
Reception voltage be equal to predeterminated voltage, it for example is 1.1V that predeterminated voltage, which is the voltage that time-sequence control module works normally,.
The time-sequence control module 30 includes first input end 12, detection signal input part 13 and feedback output end 14；Institute
It states the first output end 11 to connect with the first input end 12, the feedback output end 14 is connect with the feedback input end 15.
When the detection module 20 detects that the loss voltage on the connecting line 111 is less than or equal to the default threshold
The level of value, the control signal S1 is high level；Loss voltage on 20 pieces of mould detection connecting lines 111 of the detection
Greater than the preset threshold, the level of the control signal S1 is low level.
In one embodiment, when the level of the control signal S1 is low level, the time-sequence control module 30
Adjustment signal SCL and SDA are generated according to the control signal S1, the power management module 10 is provided according to the adjustment signal
Supply voltage be adjusted.In one embodiment, adjustment signal includes clock adjustment signal SCL and digital regulating signal
SDA。
The quantity of feedback output end 14 can be two, and the quantity of feedback input end 15 can also be two.One of them is anti-
Feedback output end 14 is for exporting clock adjustment signal SCL, another feedback output end 14 is for exporting digital regulating signal
SDA.One of feedback input end 15 is for receiving clock adjustment signal SCL, another feedback input end 15 is for receiving
Digital regulating signal SDA.
In one embodiment, when the level of the control signal S1 is low level, the time-sequence control module 30
Increase the supply voltage that the power management module provides according to the adjustment signal.
The detection module 20 includes detection unit 21 and signal generation unit 22.
The detection unit 21 is electrically connected with the power management module 11 and the time-sequence control module 30 respectively, institute
It states whether loss voltage of the detection unit 22 for detecting on the connecting line 111 is greater than preset threshold, obtains testing result；
The signal generation unit 22 is connect with the detection unit 21 and the time-sequence control module 30 respectively, the letter
Number generate unit 22 be used for according to the testing result generate control signal S1, later by the control signal S1 input it is described when
Sequence control module 30.
The detection unit 21 includes photo-coupler, and the photo-coupler has anode, cathode, emitter and collector；
The anode is connect with first output end 11, and the cathode is connect with the first input end 12, the emitter and institute
The connection of signal generation unit 22 is stated, collector access constant pressure the high level signal VDD, VDD are such as 3.3V.
The signal generation unit 22 includes metal-oxide-semiconductor Q1 and first resistor R3；The grid and the hair of the metal-oxide-semiconductor Q1
Emitter-base bandgap grading connection, the metal-oxide-semiconductor Q1 source electrode ground connection, the drain electrode of the metal-oxide-semiconductor Q1 respectively with the detection signal input part 13, institute
State one end connection of first resistor R3；The other end of the first resistor R3 accesses constant pressure high level signal VDD.Wherein, described
Metal-oxide-semiconductor is N-channel MOS pipe.
The signal generation unit 22 further includes second resistance R2, one end of the second resistance R2 respectively with the transmitting
Pole is connected with the grid of the metal-oxide-semiconductor, the other end ground connection of the second resistance R2.
Photoelectrical coupler is the device for carrying out transmission telecommunications number using light as medium, usually by photophore (two pole of infrared light emission
Pipe LED) it is encapsulated in same shell with light-receiving device (photosensitive semiconductor pipe).When input terminal power up signal, photophore issues light
Line, light-receiving device just generate photoelectric current after receiving light, flow out from output end, to realize the conversion of " electricity-light-electricity ".
Under light condition, the voltage of the equivalent resistance R1 of connecting line 111 is smaller, therefore voltage loss is smaller, photoelectricity coupling
Diode in clutch is not turned on, and photoelectrical coupler does not work, and metal-oxide-semiconductor Q1 is not turned on, the detection signal of time-sequence control module 30
The control signal S1 of the reception high level of input terminal 13.
When entering heavy condition, the voltage of the equivalent resistance R1 of connecting line 111 is larger, therefore voltage loss is larger, this
When photoelectrical coupler in diode current flow, the luminous intensity of diode becomes larger, so that the triode of photoelectrical coupler is led
It is logical, emitter is flowed through, the electric current of collector becomes by force with the enhancing of luminous intensity, so that the electric current flowed through on R2 becomes
Greatly, the voltage of A point is got higher.When the voltage of A point is higher than the conducting voltage of Q1, Q1 conducting, the detection letter of time-sequence control module 30
Number input terminal 13 receives low level control signal S1, and time-sequence control module 30 generates adjustment signal according to the control signal at this time
SCL, SDA, the supply voltage that power management module is exported are turned up, the voltage for avoiding time-sequence control module 30 from being an actually-received
It is insufficient.
The present invention also provides a kind of display devices comprising above-mentioned driving circuit.
Driving circuit and display device of the invention detects whether the loss voltage on connecting line is greater than by detection module
Preset threshold obtains testing result, and generates control signal according to the testing result, and time-sequence control module is according to the control
The supply voltage that signal provides the power management module is adjusted, so that the reception voltage etc. of the time-sequence control module
Timing is reduced due to the supply voltage according to the loss voltage adjustment power management module on connecting line in predeterminated voltage
The risk of control module damage.
In conclusion although the present invention has been disclosed above in the preferred embodiment, but above preferred embodiment is not to limit
The system present invention, those skilled in the art can make various changes and profit without departing from the spirit and scope of the present invention
Decorations, therefore protection scope of the present invention subjects to the scope of the claims.
Claims (10)
1. a kind of driving circuit characterized by comprising
Power management module, for providing supply voltage；
Time-sequence control module is electrically connected by connecting line and the power management module, and the time-sequence control module is for leading to
It crosses the connecting line and receives the supply voltage, obtain receiving voltage；
Detection module is electrically connected, for detecting the company respectively with the power management module and the time-sequence control module
Whether the loss voltage in wiring is greater than preset threshold, obtains testing result, and generate control signal according to the testing result；
Wherein when detecting that the loss voltage is greater than preset threshold, the time-sequence control module is also used to according to the control
The supply voltage that signal provides the power management module is adjusted, so that the reception voltage etc. of the time-sequence control module
In predeterminated voltage.
2. driving circuit according to claim 1, which is characterized in that
When the detection module detects that the loss voltage on the connecting line is less than or equal to the preset threshold, the control
The level of signal is high level；
When the detection module detects that loss voltage on the connecting line is greater than the preset threshold, the control signal
Level is low level.
3. driving circuit according to claim 2, which is characterized in that
When the level of the control signal is low level, the time-sequence control module is specifically used for raw according to the control signal
At adjustment signal, it is adjusted according to the supply voltage that the adjustment signal provides the power management module.
4. driving circuit according to claim 3, which is characterized in that
When the level of the control signal is low level, the time-sequence control module is specifically used for being increased according to the adjustment signal
The supply voltage that the big power management module provides.
5. driving circuit according to claim 1, which is characterized in that
The detection module includes detection unit and signal generation unit, the detection unit respectively with the power management module
It is electrically connected with the time-sequence control module, whether the loss voltage that the detection unit is used to detect on the connecting line is greater than
Preset threshold obtains testing result；
The signal generation unit is connect with the detection unit and the time-sequence control module respectively, the signal generation unit
For generating control signal according to the testing result.
6. driving circuit according to claim 5, which is characterized in that
The power management module includes the first output end and feedback input end, and the time-sequence control module includes the first input
End, detection signal input part and feedback output end；First output end is connect with the first input end, the feedback output
End is connect with the feedback input end；
The detection unit includes photo-coupler, and the photo-coupler has anode, cathode, emitter and collector；The sun
Pole is connect with first output end, and the cathode is connect with the first input end, and the emitter and the signal generate
Unit connection, the collector access constant pressure high level signal.
7. driving circuit according to claim 6, which is characterized in that
The signal generation unit includes metal-oxide-semiconductor and first resistor；
The grid of the metal-oxide-semiconductor is connect with the emitter, the source electrode of metal-oxide-semiconductor ground connection, the drain electrode of the metal-oxide-semiconductor respectively with
The detection signal input part is connected with one end of the first resistor；The other end of the first resistor accesses constant pressure high level
Signal.
8. driving circuit according to claim 7, which is characterized in that
The signal generation unit further includes second resistance, one end of the second resistance respectively with the emitter and described
The grid of metal-oxide-semiconductor connects, the other end ground connection of the second resistance.
9. driving circuit according to claim 7, which is characterized in that
The metal-oxide-semiconductor is N-channel MOS pipe.
10. a kind of display device, which is characterized in that including the described in any item driving circuits of claim 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811222539.6A CN109448621B (en) | 2018-10-19 | 2018-10-19 | Drive circuit and display device |
| PCT/CN2018/120978 WO2020077783A1 (en) | 2018-10-19 | 2018-12-13 | Drive circuit and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811222539.6A CN109448621B (en) | 2018-10-19 | 2018-10-19 | Drive circuit and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109448621A true CN109448621A (en) | 2019-03-08 |
| CN109448621B CN109448621B (en) | 2021-01-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811222539.6A Active CN109448621B (en) | 2018-10-19 | 2018-10-19 | Drive circuit and display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109448621B (en) |
| WO (1) | WO2020077783A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110148371A (en) * | 2019-05-08 | 2019-08-20 | 深圳市华星光电技术有限公司 | Driving chip waveform correction method, apparatus, storage medium and display panel |
| WO2020206615A1 (en) * | 2019-04-09 | 2020-10-15 | 京东方科技集团股份有限公司 | Driving device of display panel and driving method therefor, and display apparatus |
| WO2022047914A1 (en) * | 2020-09-02 | 2022-03-10 | Tcl华星光电技术有限公司 | Display device driving system and electronic device |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2020077783A1 (en) | 2020-04-23 |
| CN109448621B (en) | 2021-01-15 |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL China Star Optoelectronics Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |