CN104637453A - Control circuit, control system and control method of liquid crystal display module - Google Patents
Control circuit, control system and control method of liquid crystal display module Download PDFInfo
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- CN104637453A CN104637453A CN201310567863.2A CN201310567863A CN104637453A CN 104637453 A CN104637453 A CN 104637453A CN 201310567863 A CN201310567863 A CN 201310567863A CN 104637453 A CN104637453 A CN 104637453A
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Abstract
The invention discloses a control circuit, a control system and a control method of a liquid crystal display module. Wherein, the control circuit of the liquid crystal display module includes: the transmitter is connected with the liquid crystal display module and used for transmitting display data to the liquid crystal display module; the receiver is connected with the liquid crystal display module and used for receiving the response signal from the liquid crystal display module; and the main controller is connected with the transmitter and the receiver and is used for controlling the transmitter to transmit display data to the liquid crystal display module and controlling the transmitter to transmit a reset signal and/or an interrupt signal under the condition that the receiver does not receive a response signal from the liquid crystal display module. According to the invention, the problem that the liquid crystal display module is easy to break down in the prior art is solved, and the effect of providing the stability and the reliability of the liquid crystal display module is further achieved.
Description
Technical field
The present invention relates to electronic circuit field, in particular to a kind of control circuit of LCD MODULE, control system and control method.
Background technology
Along with the increase of liquid crystal display hop count, current LCD MODULE often inside is integrated with liquid crystal driving integrated circuit (Integrated Circuit, be called for short IC), but because liquid crystal display mode block space is little, be difficult to take interference protection measure in limited space, so antijamming capability own is poor.And LCD MODULE and the external world directly contact, be inevitably subject to the interference such as extraneous static or electromagnetic radiation, easily cause the drive IC in LCD MODULE to crash, after crashing, LCD MODULE can not work, and must manual power-off could solve.
For the easy out of order problem of LCD MODULE in correlation technique, at present effective solution is not yet proposed.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of control circuit of LCD MODULE, control system and control method, to solve the easy out of order problem of LCD MODULE in prior art.
To achieve these goals, according to an aspect of the present invention, provide a kind of control circuit of LCD MODULE, comprising: transmitter, be connected with LCD MODULE, for sending display data to LCD MODULE; Receiver, is connected with LCD MODULE, for receiving the response signal from LCD MODULE; And master controller, all be connected with receiver with transmitter, display data are sent to LCD MODULE for controlling transmitter, and when receiver does not receive the response signal from LCD MODULE, control transmitter and send reset signal and/or look-at-me, wherein, reset signal is for controlling liquid crystal display mode block reset, and look-at-me is used for conducting again after the current supply circuit of LCD MODULE disconnection Preset Time.
Further, control circuit also comprises: power supply, is connected with LCD MODULE; And power control circuit, being connected between power supply and LCD MODULE, and being connected with transmitter, disconnecting conducting again after Preset Time for controlling current supply circuit when receiving look-at-me.
Further, power control circuit comprises: triode, and first end is connected with power supply, and the second end is connected with the feeder ear of LCD MODULE; Resistance, is connected to the 3rd of triode the between end and transmitter; And electric capacity, be connected between first node and signal ground, wherein, first node is the node between the second end of triode and the feeder ear of LCD MODULE.
Further, transmitter, receiver and master controller are integrated in an integrated chip.
Further, transmitter is connected with LCD MODULE by iic bus.
To achieve these goals, according to a further aspect in the invention, provide a kind of control system of LCD MODULE, comprising: LCD MODULE; And control circuit, be connected with LCD MODULE, wherein, the control circuit of any one LCD MODULE that control circuit provides for foregoing of the present invention.
To achieve these goals, according to a third aspect of the invention we, provide a kind of control method of LCD MODULE, comprising: send display data to LCD MODULE; Judge whether to receive response signal, wherein, response signal represents that LCD MODULE receives display data; And when judging not receive response signal, send reset signal and/or look-at-me, wherein, reset signal is for controlling liquid crystal display mode block reset, and look-at-me is used for conducting again after the current supply circuit of LCD MODULE disconnection Preset Time.
Further, send display data to LCD MODULE, judge whether that receiving response signal comprises: after often sending and once showing data to LCD MODULE, all judge once whether receive response signal, wherein, when continuous several times is all judged not receive response signal, send reset signal and/or look-at-me.
Further, after transmission reset signal and/or look-at-me, control method also comprises: statistics does not receive the number of times of response signal continuously again.
Further, transmission reset signal and look-at-me comprise: send reset signal to LCD MODULE; Judge continuously whether transmission reset signal reaches preset times to the number of times of LCD MODULE; And when judging to send continuously the number of times of reset signal to LCD MODULE and reaching preset times, send the power control circuit of look-at-me to LCD MODULE.
Further, send look-at-me to LCD MODULE power control circuit after, control method also comprises: statistics sends continuously the number of times of reset signal to LCD MODULE again.
Further, the mode by sending pulse signal sends display data to LCD MODULE.
Further, the cycle of pulse signal is 50ms to 150ms.
Further, the cycle of pulse signal is 100ms.
The present invention adopts the control circuit of the LCD MODULE of following structure: transmitter, is connected with LCD MODULE, for sending display data to LCD MODULE; Receiver, is connected with LCD MODULE, for receiving the response signal from LCD MODULE; And master controller, all be connected with receiver with transmitter, display data are sent to LCD MODULE for controlling transmitter, and when receiver does not receive the response signal from LCD MODULE, control transmitter and send reset signal and/or look-at-me, wherein, reset signal is for controlling liquid crystal display mode block reset, and look-at-me is used for conducting again after the current supply circuit of LCD MODULE disconnection Preset Time.If the drive IC in LCD MODULE crashes, even if there are display data to send to LCD MODULE, but LCD MODULE does not have any response signal yet and produces, therefore, by arranging receiver, response signal is received, if can response signal be received, then illustrate that the drive IC of LCD MODULE is normal, if can not response signal be received, then illustrate that drive IC crashes, for the situation that drive IC crashes, transmitter is utilized to send reset signal and/or look-at-me, drive IC is made to reset and/or re-power, achieve the monitoring state of the drive IC to LCD MODULE, and when drive IC crashes, timely control drive IC replys normal work, and then the inoperable drawback of LCD MODULE avoiding drive IC to crash causing, solve the easy out of order problem of LCD MODULE in prior art, and then reach the effect that LCD MODULE stability and reliability are provided.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of the control circuit of LCD MODULE according to the embodiment of the present invention;
Fig. 2 is the circuit diagram embodiment of the present invention of power control circuit in the control circuit according to the LCD MODULE of the embodiment of the present invention;
Fig. 3 is the process flow diagram of the control method of LCD MODULE according to the embodiment of the present invention; And
Fig. 4 is the process flow diagram of the control method of LCD MODULE according to the preferred embodiment of the invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Embodiments provide a kind of control circuit of LCD MODULE, below the control circuit of the LCD MODULE that the embodiment of the present invention provides be specifically introduced:
Fig. 1 is the schematic diagram of the control circuit of LCD MODULE according to the embodiment of the present invention, and as shown in Figure 1, this control circuit 10 mainly comprises transmitter 11, receiver 12 and master controller 13, wherein:
Transmitter 11 is connected with LCD MODULE 20, for sending display data to LCD MODULE 20.Receiver 12 is connected with LCD MODULE 20 equally, for receiving the response signal from LCD MODULE 20, particularly, this response signal is the answer signal of LCD MODULE 20 to display data, if the drive IC of LCD MODULE is normal, then LCD MODULE 20 is after receiving display data, can produce response signal, if the drive IC of LCD MODULE crashes, LCD MODULE 20 does not have any response signal and produces.Master controller 13 is all connected with receiver 12 with transmitter 11, display data are sent to LCD MODULE 20 for controlling transmitter 11, and when receiver 12 does not receive the response signal from LCD MODULE 20, control transmitter 11 and send reset signal and/or look-at-me, wherein, reset signal is for controlling liquid crystal display mode block reset, and look-at-me is used for the current supply circuit of LCD MODULE 20 to disconnect conducting again after the first Preset Time (such as 200ms).
The control circuit of the embodiment of the present invention, by arranging receiver, response signal is received, if can response signal be received, then illustrate that the drive IC of LCD MODULE is normal, if can not response signal be received, then illustrate that drive IC crashes, for the situation that drive IC crashes, transmitter is utilized to send reset signal and/or look-at-me, drive IC is made to reset and/or re-power, achieve the monitoring state of the drive IC to LCD MODULE, and when drive IC crashes, timely control drive IC replys normal work, and then the inoperable drawback of LCD MODULE avoiding drive IC to crash causing, solve the easy out of order problem of LCD MODULE in prior art, and then reach the effect improving LCD MODULE stability and reliability.
Wherein, transmitter 11, receiver 12 and master controller 13 can be integrated in an integrated chip, and transmitter 11 sends display data by IIC-BUS bus to LCD MODULE 20.In embodiments of the present invention, can send at interval of the second Preset Time (such as 100ms) and once show data to LCD MODULE 20, LCD MODULE 20 is when normally receiving display data, feedback response signal, to integrated chip, carries out liquid crystal display according to received display data simultaneously.
Further, the control circuit of the LCD MODULE of the embodiment of the present invention also comprises power supply VCC1 and power control circuit 14, wherein, power supply VCC1 is connected with LCD MODULE 20, power control circuit 14 is connected between power supply VCC1 and LCD MODULE 20, and be connected with transmitter 11, for when receiving look-at-me, controlling the current supply circuit of LCD MODULE 20 and disconnecting conducting again again after the first Preset Time.Fig. 2 is the circuit diagram of power control circuit 14 in the control circuit of the LCD MODULE that the embodiment of the present invention provides, as shown in Figure 2, power control circuit 14 mainly comprises triode Q81, resistance R82 and electric capacity C1, wherein, the first end of triode Q81 is connected with power supply VCC1, second end of triode Q81 is connected with the feeder ear of LCD MODULE 20, resistance R82 is connected between the 3rd end of triode Q81 and the look-at-me output port LCD_1OWER of transmitter 11, electric capacity C1 is connected between first node and signal ground, wherein, first node is the node between second end of triode Q81 and the feeder ear of LCD MODULE 20.In Fig. 2, the reset terminal of LCD MODULE 20 connects the reset signal output port LCD_RESET of transmitter 11, and the data receiver port of LCD MODULE 20 is connected with the display data transmit port of transmitter by data transmission link (COM-BUS0, COM-BUS1, COM-BUS2 etc.).
The principle of work of this power control circuit 14 is: when the look-at-me output port LCD_POWER of transmitter 11 has high level output, triode Q81 conducting, realize powering to LCD MODULE, when the look-at-me output port LCD_POWER of transmitter 11 has low level output, triode Q81 ends, and disconnects the power supply of LCD MODULE.Wherein, the effect of electric capacity C1 carries out filtering to the power supply of LCD MODULE, adding strong anti-interference ability by controlling the ratio of low and high level in look-at-me, realizing the power-off time controlling LCD MODULE 20.
The embodiment of the present invention additionally provides a kind of control system of LCD MODULE, the control circuit that this control system comprises LCD MODULE and is connected with LCD MODULE, wherein, the control circuit of any one LCD MODULE that provides for embodiment of the present invention foregoing of control circuit.
The embodiment of the present invention additionally provides a kind of control method of LCD MODULE, the control circuit of any one LCD MODULE that this control method can be provided by embodiment of the present invention foregoing performs, and is specifically introduced below to the control method of the LCD MODULE that the embodiment of the present invention provides:
Fig. 3 is the process flow diagram of the control method of LCD MODULE according to the embodiment of the present invention, and as shown in Figure 3, the method mainly comprises the steps that S302 is to step S306:
S302: send display data to LCD MODULE, particularly, can send display data by iic bus to LCD MODULE, also can send display data by other data transfer mode to LCD MODULE.Display data can represent with pulse signal, that is, the mode by sending pulse signal sends display data to LCD MODULE, and wherein, the cycle of pulse signal is 50ms to 150ms, is preferably 100ms.
S304: judge whether to receive response signal, wherein, response signal represents that LCD MODULE receives display data, that is, response signal is the answer signal of LCD MODULE to display data, if the drive IC of LCD MODULE is normal, then LCD MODULE is after receiving display data, can produce response signal, if the drive IC of LCD MODULE crashes, LCD MODULE does not have any response signal and produces.
S306: when judging not receive response signal, send reset signal and/or look-at-me, wherein, reset signal is for controlling liquid crystal display mode block reset, and look-at-me is used for the current supply circuit of LCD MODULE to disconnect conducting again after the first Preset Time (such as 200ms).
The control method of the LCD MODULE of the embodiment of the present invention, by arranging, response signal is received, if can response signal be received, then illustrate that the drive IC of LCD MODULE is normal, if can not response signal be received, then illustrate that drive IC crashes, for the situation that drive IC crashes, transmitter is utilized to send reset signal and/or look-at-me, drive IC is made to reset and/or re-power, achieve the monitoring state of the drive IC to LCD MODULE, and when drive IC crashes, timely control drive IC replys normal work, and then the inoperable drawback of LCD MODULE avoiding drive IC to crash causing, solve the easy out of order problem of LCD MODULE in prior art, and then reach the effect improving LCD MODULE stability and reliability.
Fig. 4 is the process flow diagram of the control method of LCD MODULE according to the preferred embodiment of the invention, as shown in Figure 4, in the preferred embodiment, carries out display data and sends and judge whether that the concrete mode receiving response signal is:
After often sending and once showing data to LCD MODULE, all judge once whether receive response signal, often judge once not receive response signal, then illustrate that LCD MODULE is in exception, to judging that the read-around ratio not receiving response signal is added up continuously, when the number of times not receiving response signal continuously counted exceedes threshold value, namely, when continuous several times (this is repeatedly number of times more than threshold value) is all judged not receive response signal, send reset signal and/or look-at-me, wherein, if continuous several times is all judged not receive response signal, then illustrate that LCD MODULE abnormal time exceedes outlier threshold, diagrammatically illustrate in Fig. 4 using the continuous abnormal time and whether exceed threshold value as Rule of judgment.Wherein, the concrete number of times of continuous several times can specifically be arranged according to actual needs.
By adding up the number of times not receiving response signal continuously, and after statistical value reaches certain threshold value, send reset signal and/or look-at-me again, achieve and avoid because accidentalia causes the erroneous judgement of whether crashing to drive IC, reach the effect improving control accuracy.
Wherein, after transmission reset signal and/or look-at-me, need the number of times not receiving response signal continuously to counting to reset, then statistics does not receive the number of times of response signal continuously again.Reset by the number of times not receiving response signal gone out current statistic, and again add up, achieving can to judging whether drive IC crashes, and accurately judges next time.
Further, in embodiments of the present invention, the concrete mode sending reset signal and look-at-me is: first, first sends reset signal to LCD MODULE, in transmission reset signal in the process of LCD MODULE, the number of times sending reset signal is added up.Then, judge continuously (namely whether transmission reset signal reach preset times to the number of times of LCD MODULE, predetermined threshold value), when judging to send continuously the number of times of reset signal to LCD MODULE and reaching preset times, send the power control circuit of look-at-me to LCD MODULE, namely, when exceeding predetermined threshold value to the number of resets of LCD MODULE, power control circuit to LCD MODULE sends look-at-me, re-power after controlling LCD MODULE power-off Preset Time, LCD MODULE is allowed to automatically restore to normal operating conditions.
The time of carrying out LCD MODULE owing to utilizing reset signal and restarting, the time of restarting is re-powered after the power-off of relation control LCD MODULE, consuming time shorter needed for the former, therefore, in embodiments of the present invention, preferential employing utilizes reset signal control LCD MODULE to recover, achieve the effect controlling LCD MODULE fast and recover, after the number of times of continuous several times reset reaches certain number of times, adopt interrupt mode to control LCD MODULE again to recover, reach the effect ensureing that control LCD MODULE can be recovered, the stability of further raising LCD MODULE.
Wherein, send look-at-me to LCD MODULE power control circuit after, need to clear up the number of times of the continuous transmission reset signal counted to LCD MODULE, and statistics sends continuously the number of times of reset signal to LCD MODULE again.Reset by the continuous transmission reset signal that goes out the current statistic number of times to LCD MODULE, and again add up, achieving can to judging whether that sending look-at-me accurately judges to power control circuit next time.
As can be seen from the above description, present invention achieves the inoperable drawback of LCD MODULE avoiding drive IC to crash causing, reach the effect improving LCD MODULE stability and reliability.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the process flow diagram of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (14)
1. a control circuit for LCD MODULE, is characterized in that, comprising:
Transmitter, is connected with described LCD MODULE, for sending display data to described LCD MODULE;
Receiver, is connected with described LCD MODULE, for receiving the response signal from described LCD MODULE; And
Master controller, all be connected with described receiver with described transmitter, display data are sent to described LCD MODULE for controlling described transmitter, and when described receiver does not receive the response signal from described LCD MODULE, control described transmitter and send reset signal and/or look-at-me, wherein, described reset signal is for controlling described liquid crystal display mode block reset, and described look-at-me is used for conducting again after the current supply circuit of described LCD MODULE disconnection Preset Time.
2. control circuit according to claim 1, is characterized in that, described control circuit also comprises:
Power supply, is connected with described LCD MODULE; And
Power control circuit, is connected between described power supply and described LCD MODULE, and is connected with described transmitter, disconnects conducting again after described Preset Time for controlling described current supply circuit when receiving described look-at-me.
3. control circuit according to claim 2, is characterized in that, described power control circuit comprises:
Triode (Q81), first end is connected with described power supply, and the second end is connected with the feeder ear of described LCD MODULE;
Resistance (R82), is connected between the 3rd end of described triode (Q81) and described transmitter; And
Electric capacity (C1), is connected between first node and signal ground, and wherein, described first node is the node between the second end of described triode (Q81) and the feeder ear of described LCD MODULE.
4. control circuit according to claim 1, is characterized in that, described transmitter, described receiver and described master controller are integrated in an integrated chip.
5. control circuit according to any one of claim 1 to 4, is characterized in that, described transmitter is connected with described LCD MODULE by iic bus.
6. a control system for LCD MODULE, is characterized in that, comprising:
LCD MODULE; And
Control circuit, is connected with described LCD MODULE, wherein, and the control circuit of described control circuit according to any one of claim 1 to 5.
7. a control method for LCD MODULE, is characterized in that, comprising:
Send display data to described LCD MODULE;
Judge whether to receive response signal, wherein, described response signal represents that described LCD MODULE receives described display data; And
When judging not receive described response signal, send reset signal and/or look-at-me, wherein, described reset signal is for controlling described liquid crystal display mode block reset, and described look-at-me is used for conducting again after the current supply circuit of described LCD MODULE disconnection Preset Time.
8. control method according to claim 7, is characterized in that, sends display data to described LCD MODULE, judges whether that receiving response signal comprises:
After often sending once described display data to described LCD MODULE, all judge once whether receive described response signal,
Wherein, when continuous several times is all judged not receive described response signal, described reset signal and/or described look-at-me is sent.
9. control method according to claim 8, is characterized in that, after the described reset signal of transmission and/or described look-at-me, described control method also comprises:
Again statistics does not receive the number of times of described response signal continuously.
10. control method according to claim 9, is characterized in that, sends described reset signal and described look-at-me comprises:
Send described reset signal to described LCD MODULE;
Judge continuously whether the described reset signal of transmission reaches preset times to the number of times of described LCD MODULE; And
When judging to send continuously the number of times of described reset signal to described LCD MODULE and reaching described preset times, send the power control circuit of described look-at-me to described LCD MODULE.
11. control methods according to claim 10, is characterized in that, send described look-at-me to described LCD MODULE power control circuit after, described control method also comprises:
Again statistics sends the number of times of described reset signal to described LCD MODULE continuously.
12. control methods according to any one of claim 7 to 11, is characterized in that, send described display data to described LCD MODULE by the mode sending pulse signal.
13. control methods according to claim 12, is characterized in that, the cycle of described pulse signal is 50ms to 150ms.
14. control methods according to claim 13, is characterized in that, the cycle of described pulse signal is 100ms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567863.2A CN104637453A (en) | 2013-11-13 | 2013-11-13 | Control circuit, control system and control method of liquid crystal display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567863.2A CN104637453A (en) | 2013-11-13 | 2013-11-13 | Control circuit, control system and control method of liquid crystal display module |
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| CN104637453A true CN104637453A (en) | 2015-05-20 |
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| CN201310567863.2A Pending CN104637453A (en) | 2013-11-13 | 2013-11-13 | Control circuit, control system and control method of liquid crystal display module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110164392A (en) * | 2019-04-28 | 2019-08-23 | 珠海黑石电气自动化科技有限公司 | A kind of antistatic LCD drive method, circuit, device and storage medium |
-
2013
- 2013-11-13 CN CN201310567863.2A patent/CN104637453A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110164392A (en) * | 2019-04-28 | 2019-08-23 | 珠海黑石电气自动化科技有限公司 | A kind of antistatic LCD drive method, circuit, device and storage medium |
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