CN101727824B - Control method and device for plasma display - Google Patents
Control method and device for plasma display Download PDFInfo
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- CN101727824B CN101727824B CN2009100810309A CN200910081030A CN101727824B CN 101727824 B CN101727824 B CN 101727824B CN 2009100810309 A CN2009100810309 A CN 2009100810309A CN 200910081030 A CN200910081030 A CN 200910081030A CN 101727824 B CN101727824 B CN 101727824B
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Abstract
The invention provides a temperature reading method for a plasma display and a device; the method comprises the following steps: detect the temperature of the plasma display and change the control waveform of a low-voltage control module of the plasma display according to the temperature, so as to lead the waveform generated by a high-voltage driving circuit module of the plasma display for driving the voltage to be changed along with the change of the temperature; the invention realizes to improve the technical effect of plasma display effect and the stability.
Description
Technical field
The present invention relates to field of display, in particular to a kind of control method and device that is used for plasma display.
Background technology
In the plasma display of routine; Usually the control waveform that produces through low-pressure control module is controlled the break-make of metal-oxide-semiconductor in the high-voltage driving circuit module, is used to drive the driving voltage that plasma panel normally shows so that the high-voltage driving circuit module produces.
In implementation procedure of the present invention, the inventor finds that the control waveform that the low-pressure control module in the correlation technique produces is constant always, thereby makes the waveform of the driving voltage that produced by control waveform control also remain unchanged always.Yet, when the temperature of plasma display changes,, can influence the display effect and the stability of plasma display if the waveform of driving voltage remains unchanged.
Summary of the invention
The invention provides a kind of temperature that is used for plasma display and read circuit and method, the temperature that can solve in the correlation technique reads circuit structure complicated technology problem.
According to an aspect of the present invention, a kind of control method that is used for plasma display is provided, has comprised: the temperature that detects plasma display; And according to the control waveform of the low-pressure control module of temperature change plasma display, so that the waveform of the driving voltage that the high-voltage driving circuit module produced of plasma display is according to variation of temperature and respective change.
According to a further aspect in the invention, a kind of control device that is used for plasma display is provided also, has comprised: temperature detecting module is used to detect the temperature of plasma display; Low-pressure control module is used for producing control waveform according to temperature; And the high-voltage driving circuit module, being used for producing driving voltage and normally showing to drive plasma display according to control waveform, its waveform is according to variation of temperature and respective change.
In embodiments of the present invention; Change control waveform through basis by the detected temperature of temperature detecting unit; So that the waveform change of driving voltage; So when having overcome the temperature that exists in the correlation technique and having changed at plasma display, the waveform of driving voltage the remain unchanged display effect that caused influencing plasma display and the problem of stability, and then reached the technique effect that improves plasma display effect and stability.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the process flow diagram of the control method that is used for plasma display according to an embodiment of the invention;
Fig. 2 A shows the sequential chart of the temperature read method that is used for plasma display according to an embodiment of the invention to Fig. 2 B;
Fig. 3 shows the block scheme of the control device that is used for plasma display according to another embodiment of the present invention; And
Fig. 4 shows the block scheme of the control device temperature read module that is used for plasma display according to another embodiment of the present invention.
Embodiment
I2C (Inter-Integrated Circuit is between integrated circuit) bus has signal wire characteristics few, easy and simple to handle.In a lot of fields, the I2C bus obtains application more and more widely.The I2C bus is by data line SDA (Serial Data; Serial data) and the universal serial bus that constitutes of clock line SCL (Serial Clock, serial clock), can transmit and receive data; Between CPU and the controlled IC, carry out two-way transmission between IC and the IC, the highest transfer rate can reach 100kbps.The signal that the I2C bus transmits has following three types:
Commencing signal: when SCL was high level, to low transition, expression began to transmit data to SDA by high level;
End signal: when SCL was low level, to the high level saltus step, expression finished to transmit data to SDA by low level;
Answer signal: the IC that receives data sends specific low level pulse to the IC that sends data after receiving the 8bit data, the data that expression is sent are received.
CPU waits for that controlled cell sends corresponding answer signal after controlled cell sends signal.If after CPU receives answer signal, then make whether continuing to send signal judgment according to actual conditions; If CPU does not receive answer signal, then be judged as controlled cell and break down.
The I2C agreement is used master/slave both-way communication.The device that sends data to bus is defined as transmitter, and the device that receives data from bus is defined as receiver.Main device and can work in from device receives and transmit status, this depend on its function that will accomplish.Bus must be by main device (being generally microcontroller) control, and main device produces the transmission direction that serial clock SCL comes control bus, and produce commencing signal and end signal.Data mode on the sda line only could change during SCL is low level, SCL be high level during, the change of SDA state is used to represent commencing signal and end signal.After commencing signal, must be the control byte of device, wherein high four then three are the sheet choosing for type of device identifier (different chip types has different definition), last RW is read-write, is read operation when being 1, be 0 o'clock be write operation.
Below with reference to accompanying drawing and combine embodiment, specify the present invention.
Fig. 1 shows the process flow diagram of the control method that is used for plasma display according to an embodiment of the invention, may further comprise the steps:
Step S10, the temperature of detection plasma display; And
Step S20 is according to the control waveform of the low-pressure control module of temperature change plasma display, so that the waveform of the driving voltage that the high-voltage driving circuit module produced of plasma display is according to variation of temperature and respective change.
The control method that is used for plasma display according to an embodiment of the invention is through changing control waveform according to detected temperature; So that the waveform change of driving voltage; So when having overcome the temperature that exists in the correlation technique and having changed at plasma display; Display effect and stable problem that the waveform of driving voltage remains unchanged and caused influencing plasma display, and then reached the technique effect that improves plasma display effect and stability.
Preferably, the temperature of detection plasma display specifically comprises: utilize the temperature sensor detected temperatures; Utilize the temperature read module to read said temperature, wherein, be connected by (I2C) bus between integrated circuit between temperature sensor and the temperature read module.
This temperature read method that is used for plasma display at first utilizes temperature sensor to detect the temperature of plasma display; Utilize the temperature read module to detect the temperature of gained via I2C bus reading temperature sensor again; This temperature read method based on the I2C bus improves real time of data transmission; And make temperature read that circuit structure is simple more to be realized with being easy to, read the circuit structure complicated problems thereby overcome the employed temperature that exists in the correlation technique.
Preferably, the model of temperature sensor is FM75, and the clock of temperature sensor (SCL), data (SDA) pin are connected to the temperature read module.
FM75 type temperature sensor is the low pressure two wires digital temperature sensor of band temperature alarm function, and it is detected temperatures constantly, and exports the digital quantity corresponding to temperature through the SDA pin that is connected to digital serial interface.Through different configurations, can select different precision, even the digital quantity of its output is the 9-12 position, wherein 12 precision is the highest.FM75 has 8 pins:
Pin one (SDA) is the I/O pin, is connected in the data line of I2C bus;
Pin two (SCL) is an input pin, is connected in the clock line of I2C bus, is used to read the sequential of I2C bus;
Pin 3 (O.S.) is an output pin, is used to export temperature alarm;
Pin 4 (GND) ground connection;
Pin 5-7 (A0-A2) is an input pin, is used for the sheet choosing;
Pin 8 (V
DD) connect supply voltage.
FM75 type temperature sensor has the accuracy of detection height, the characteristics that energy consumption is little.Owing to only used a temperature sensor among this embodiment, so select pin A0-A2 to be electrically connected to the stratum of circuit board corresponding three sheets of temperature sensor.
The SCL pin of FM75 type temperature sensor is connected to the temperature read module; Make FM75 can read the sequential of temperature read module easily, and maintenance and temperature read module are synchronous, the SDA pin of FM75 is connected to the temperature read module; Can be directly from then on pin read FM75 and detect the corresponding digital signal of institute's temperature; Because transmission is digital signal, compares the temperature read method based on mimic channel, improved the real-time and the accuracy of communication.
Fig. 2 A shows the sequential chart of the temperature read method that is used for plasma display according to an embodiment of the invention.With reference to figure 2A, the temperature read module reads temperature and comprises:
The temperature read module sends commencing signal S; And send the control byte comprise write order to temperature sensor; The control byte here is specially address byte (Address Byte), and wherein high 4 " 1001 " are the type of device identifier, and next 3 A2-A0 are chip selection signal; Last read-write position, position RW is " 0 ", representes that ensuing operation will be that temperature sensor is carried out write operation;
After receiving the answer signal A of temperature sensor, send temperature register order " 00000000 " to the temperature register of temperature sensor, represent that ensuing operation will be in the face of the temperature register in the temperature sensor;
After receiving the answer signal A of temperature sensor; Resend commencing signal S; And send the control byte comprise read command to temperature sensor, the control byte here is specially address byte, and is different with the above-mentioned control byte that comprises write order; Its last read-write position, position RW is " 1 ", representes that ensuing operation will be that temperature sensor is carried out read operation;
After receiving the answer signal A of temperature sensor, read the most-significant byte of temperature register, wherein the valid data position is D7-D0, sees answer signal A simultaneously off;
And the least-significant byte that reads temperature register; Wherein the valid data position is that D7-D4 is (through configuration; Can make FM75 output number of significant digit is the digital quantity of 9-12 position); And see non-answer signal N and end signal P off, in conjunction with above-mentioned most-significant byte data, the temperature read module can calculate the current temperature value of detection
The temperature read module is through sending address byte to the SDA of I2C bus data line; To choose temperature sensor is operand and enable write operation, sends the temperature register order then operand is refined as the temperature register in the temperature sensor, sends address byte to enable read operation to temperature register again; The high low byte that reads temperature register at last respectively is to obtain current temperature value; This method is simple, utilizes the SCL clock line and the SDA data line of I2C bus, can realize that order to temperature sensor writes and data read; And transfer rate is fast, but the real-time requirement that satisfied temperature detects.
Fig. 2 B shows the sequential chart of the temperature read method that is used for plasma display according to an embodiment of the invention.With reference to figure 2B, before sending write order, also comprise to temperature sensor:
Send commencing signal S; And send the control byte comprise write order to temperature sensor; The control byte here is specially address byte (Address Byte), and wherein high 4 " 1001 " are the type of device identifier, and next 3 A2-A0 are chip selection signal; Last read-write position, position RW is " 0 ", representes that ensuing operation will be that temperature sensor is carried out write operation;
After receiving the answer signal A of temperature sensor,, represent that ensuing operation will be in the face of the configuration register in the temperature sensor to the configuration register transmission configuration register order " 00000001 " of temperature sensor;
After receiving the answer signal A of temperature sensor, to the configuration register transmission control byte of temperature sensor, the control byte here is specially data byte (Data Byte), is " 00000000 ", sends end signal P then.
Before sending write order, carry out aforesaid operations to temperature sensor; Purpose is in order before reading temperature data, temperature sensor to be configured: at first through sending address byte; To choose the operation of temperature sensor and enable write; Send the configuration register order then operand is refined as the configuration register in the temperature sensor, send data byte at last and come temperature sensor is carried out corresponding configuration, to cooperate ensuing temperature read operation.
Preferably, each temperature is all carried out the said temperature read method.
Said temperature read method of every execution can be accomplished reading of a temperature, and when a plurality of temperature need read, the associative operation of then carrying out the said temperature read method repeatedly got final product, and like this, can realize the long-term monitoring to temperature easily.
Temperature read method in the present embodiment adopts the state machine conversion of 8 states to realize aforesaid operations.
Fig. 3 shows the block scheme of the control device that is used for plasma display according to another embodiment of the present invention, comprising:
The control device that is used for plasma display according to an embodiment of the invention changes control waveform through basis by the detected temperature of temperature detecting module; So that the waveform change of driving voltage; So when having overcome the temperature that exists in the correlation technique and having changed at plasma display; Display effect and stable problem that the waveform of driving voltage remains unchanged and caused influencing plasma display, and then reached the technique effect that improves plasma display effect and stability.
Preferably, temperature detecting module 10 specifically comprises: temperature sensor is used to detect the temperature of plasma display; And the temperature read module, be used to read temperature, wherein, be connected by (I2C) bus between integrated circuit between temperature sensor and the temperature read module.
This temperature detecting module that is used for plasma display at first utilizes temperature sensor to detect the temperature of plasma display; Utilize the temperature read module to detect the temperature of gained via I2C bus reading temperature sensor again; This temperature read method based on the I2C bus improves real time of data transmission; And make temperature read that circuit structure is simple more to be realized with being easy to, read the circuit structure complicated problems thereby overcome the employed temperature that exists in the correlation technique.
Preferably, the model of temperature sensor is FM75, and the clock of temperature sensor (SCL), data (SDA) pin are connected to the temperature read module.
FM75 type temperature sensor is the low pressure two wires digital temperature sensor of band temperature alarm function, and it is detected temperatures constantly, and exports the digital quantity corresponding to temperature through the SDA pin that is connected to digital serial interface.Through different configurations, can select different precision, even the digital quantity of its output is the 9-12 position, wherein 12 precision is the highest.FM75 has 8 pins:
Pin one (SDA) is the I/O pin, is connected in the data line of I2C bus;
Pin two (SCL) is an input pin, is connected in the clock line of I2C bus, is used to read the sequential of I2C bus;
Pin 3 (O.S.) is used to export temperature alarm for output;
Pin 4 (GND) ground connection;
Pin 5-7 (A0-A2) is an input pin, is used for the sheet choosing;
Pin 8 (V
DD) connect supply voltage.
FM75 type temperature sensor has the accuracy of detection height, the characteristics that energy consumption is little.Owing to only used a temperature sensor among this embodiment, so select pin A0-A2 directly to receive on the stratum of circuit board corresponding three sheets of temperature sensor.
The SCL pin of FM75 type temperature sensor is connected to the temperature read module; Make FM75 can read the sequential of temperature read module easily, and maintenance and temperature read module are synchronous, the SDA pin of FM75 is connected to the temperature read module; Can be directly from then on pin read FM75 and detect the corresponding digital signal of institute's temperature; Because transmission is digital signal, compares the temperature read method based on mimic channel, improved the real-time and the accuracy of communication.
Fig. 4 shows the block scheme of the temperature reading device temperature read module that is used for plasma display according to another embodiment of the present invention, and this module comprises:
I2C vouching unit 402, the high-low level conversion that is used to produce SCL, SDA;
Said units cooperates with each other, thereby has realized that the temperature read module utilizes I2C bus reading temperature sensor to detect the function of gained temperature, and has realized the simple beneficial effect of circuit structure.
From above description, can find out that the above embodiments of the present invention have realized simple in structure, the technique effect that is easy to realize.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the memory storage and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a control method that is used for plasma display is characterized in that, comprising:
Utilize temperature sensor to detect said temperature;
Utilize the temperature read module to read said temperature;
According to the control waveform of the low-pressure control module of the said plasma display of said temperature change, so that the waveform of the driving voltage that the high-voltage driving circuit module produced of said plasma display is according to said variation of temperature and respective change.
2. control method according to claim 1 is characterized in that, is connected by (I2C) bus between integrated circuit between said temperature sensor and the said temperature read module.
3. control method according to claim 1 is characterized in that, the model of said temperature sensor is FM75, and the clock of said temperature sensor (SCL), data (SDA) pin are connected to said temperature read module.
4. control method according to claim 3 is characterized in that, utilizes the temperature read module to read said temperature and specifically comprises:
Send commencing signal, and send write order to said temperature sensor;
After receiving the answer signal of said temperature sensor, send the temperature register order to the temperature register of said temperature sensor;
After receiving the answer signal of said temperature sensor, resend commencing signal, and send read command to said temperature sensor;
Read the most-significant byte of said temperature register, see answer signal simultaneously off; And
Read the least-significant byte of said temperature register, and see non-answer signal and end signal off, obtain said temperature in conjunction with said most-significant byte and said least-significant byte.
5. control method according to claim 4 is characterized in that, before sending write order to said temperature sensor, also comprises:
Send commencing signal, and send write order to said temperature sensor;
After receiving the answer signal of said temperature sensor, to the configuration register transmission configuration register order of said temperature sensor;
After receiving the answer signal of said temperature sensor, to the said configuration register transmission control byte of said temperature sensor.
6. control method according to claim 4 is characterized in that, each said temperature is all carried out said temperature read method.
7. a control device that is used for plasma display is characterized in that, comprising:
Temperature sensor module is used to utilize temperature sensor to detect said temperature;
The temperature read module is used to utilize the temperature read module to read said temperature;
Low-pressure control module is used for producing control waveform according to said temperature; And
The high-voltage driving circuit module is used for producing driving voltage according to said control waveform and normally shows to drive said plasma display, and its waveform is according to said variation of temperature and respective change.
8. control device according to claim 7 is characterized in that, is connected by (I2C) bus between integrated circuit between said temperature sensor and the said temperature read module.
9. control device according to claim 8 is characterized in that, the model of said temperature sensor is FM75, and the clock of said temperature sensor (SCL), data (SDA) pin are connected to said temperature read module.
10. control device according to claim 9 is characterized in that, said temperature read module comprises:
(I2C) vouching unit between integrated circuit, the high-low level conversion that is used to produce clock (SCL), data (SDA);
Circuit unit between integrated circuit, be used to realize (I2C) communication between integrated circuit beginning, finish, reply and the string and the conversion of read-write operation and inputoutput data; And
Control module is used for sending temperature read command to obtain said temperature to said temperature sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100810309A CN101727824B (en) | 2009-03-30 | 2009-03-30 | Control method and device for plasma display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100810309A CN101727824B (en) | 2009-03-30 | 2009-03-30 | Control method and device for plasma display |
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| Publication Number | Publication Date |
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| CN101727824A CN101727824A (en) | 2010-06-09 |
| CN101727824B true CN101727824B (en) | 2012-05-30 |
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| CN2009100810309A Expired - Fee Related CN101727824B (en) | 2009-03-30 | 2009-03-30 | Control method and device for plasma display |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306270A (en) * | 2000-01-18 | 2001-08-01 | 达碁科技股份有限公司 | Backplate of plasma display and its making method |
| CN1327224A (en) * | 2000-01-26 | 2001-12-19 | 松下电器产业株式会社 | Plasma display panel and its producing method |
| CN1601593A (en) * | 2003-09-02 | 2005-03-30 | 三星Sdi株式会社 | Plasma display panel and method for driving the same |
-
2009
- 2009-03-30 CN CN2009100810309A patent/CN101727824B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1306270A (en) * | 2000-01-18 | 2001-08-01 | 达碁科技股份有限公司 | Backplate of plasma display and its making method |
| CN1327224A (en) * | 2000-01-26 | 2001-12-19 | 松下电器产业株式会社 | Plasma display panel and its producing method |
| CN1601593A (en) * | 2003-09-02 | 2005-03-30 | 三星Sdi株式会社 | Plasma display panel and method for driving the same |
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| CN101727824A (en) | 2010-06-09 |
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