CN100412924C - Control device for transformer of plasma display module and method therefor - Google Patents
Control device for transformer of plasma display module and method therefor Download PDFInfo
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- CN100412924C CN100412924C CNB2005100466110A CN200510046611A CN100412924C CN 100412924 C CN100412924 C CN 100412924C CN B2005100466110 A CNB2005100466110 A CN B2005100466110A CN 200510046611 A CN200510046611 A CN 200510046611A CN 100412924 C CN100412924 C CN 100412924C
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- transformer
- plasma display
- frequency
- controller
- microprocessor
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Abstract
The present invention relates to a plasma display (PDP) module, particularly to a device and a method for controlling a transformer of the plasma display (PDP) module. The device is composed of a transformer supplying a driving power supply generating diversified electric levels to the plasma display module, a controller integrated circuit (IC) arranged for executing the frequency regulating operation of the feedback current of the transformer according to control signals and a microprocessor arranged for determining the driven maintaining electrode number of the plasma display module according to the brightness of input image signals and outputting the control signals of switching on / off the frequency regulating operation of the controller integrated circuit according to the driven maintaining electrode number. The present invention solves the problem of reliability reduction of the controller integrated circuit (IC) and the transformer due to high operating frequencies, variable frequencies and magnitudes under the condition of large variation of the feedback current.
Description
Affiliated technical field
The present invention relates to a kind of plasma and show (PDP) module, particularly relate to control device for transformer and method that a kind of plasma shows (PDP) module.
Background technology
It is to adopt the parts that high voltage/big electric current carries out work that traditional each component parts for plasma demonstration (PDP) module provides the power supply unit, particularly transformer wherein of power supply, and its subject matter is heating problem.The tradition plasma shows the power supply unit of (PDP) module, is to be made of following part as shown in Figure 1: the driving power that produces diversified level is offered the transformer 12 that plasma shows (PDP) module 10; Obtain transformer 12 output currents feedback, and adjust the controller IC (IC) 11 of the frequency of operation of transformer 12 according to the output current of feedback.
As above-mentioned, controller IC (IC) the 11st, the pattern that employing comes controlled frequency according to feedback current promptly increases with feedback current, and how many just corresponding current values increases, and the pattern that frequency is reduced the electric current added value reduces the work that transformer generates heat.
At this moment, if the change of transformer 12 feedback currents is bigger,, thereby reduced the reliability of controller IC (IC) 11 and transformer 12 then because the variable frequency of frequency of operation and variable amplitude become big.
Summary of the invention
The present invention develops for the problem that solves the conventional art existence, only its objective is and to come controlled frequency work based on feedback current, the control device for transformer and the method for the plasma display module that can prevent to reduce controller IC (IC) and transformer reliability is provided simultaneously forming under the condition of setting.
In order to solve the problems of the technologies described above, the present invention is achieved in that
Plasma shows that the control device for transformer of (PDP) module is to be made of following part: the driving power that produces diversified level is offered the transformer that plasma shows (PDP) module; The controller IC (IC) that is provided with for the frequency adjustment work of carrying out the transformer feedback electric current according to control signal; Brightness decides being driven of (PDP) module of plasma demonstration to keep number of electrodes according to received image signal, and keep number of electrodes according to being driven, the microprocessor that the control signal of controller IC (IC) frequency adjustment work being connected/being closed for output is provided with.
The transformer control method of plasma display of the present invention (PDP) module just has: controller IC of the frequency of operation of transformer being controlled according to the feedback current of transformer (IC) and decision plasma show that the plasma that is driven the microprocessor of keeping number of electrodes of (PDP) module shows that the transformer control method of (PDP) module is made up of the following stage: microprocessor is kept number of electrodes and whether is carried out the judgement stage less than setting value being driven; Microprocessor will be according to its judged result, for the control signal that the Control work of controller IC (IC) frequency of operation is connected is carried out output stage; Controller IC (IC) will carry out the adjusting stage to the transformer frequency of operation according to microprocessor control signal.
Described setting value is to consider that the benchmark of setting after the transformer heat generation is driven to keep number of electrodes.
The transformer control method of described plasma display module, it also comprises the following stage: to keep number of electrodes be more than the setting value if be driven, and then microprocessor carries out output stage to the control signal of connecting for the Control work of controller IC frequency of operation; Controller IC will will carry out the maintenance stage with current state to the frequency of operation of transformer according to microprocessor control signal.
Effect of the present invention is as follows:
The control device for transformer and the method for plasma display of the present invention (PDP) module, keep number of electrodes and only consider that as benchmark transformer produces overheated situation to be driven, controller IC (IC) forms the control action to the transformer frequency of operation, therefore perfectly solved because under the feedback current variation situation greatly, frequency of operation variable frequency and variable amplitude cause reduction controller IC (IC) and transformer integrity problem greatly.
Description of drawings
Fig. 1 is the relevant general block diagram that constitutes of power supply that traditional plasma shows (PDP) module.
Fig. 2 is average picture level (APL) family curve presentation graphs.
Fig. 3 is the formation block scheme that plasma of the present invention shows the control device for transformer of (PDP) module.
Fig. 4 is the transformer control method process flow diagram that plasma of the present invention shows (PDP) module.
The accompanying drawing major part is illustrated:
Among the figure, 30: plasma shows (PDP) module, 31: microprocessor, 32: controller IC (IC), 33: transformer.
Embodiment
Below, plasma of the present invention is shown that the control device of transformer of (PDP) module and the embodiment of method are elaborated with reference to accompanying drawing.
Fig. 2 is average picture level (APL) family curve presentation graphs; Fig. 3 is the formation block scheme that plasma of the present invention shows the control device for transformer of (PDP) module; Fig. 4 is the transformer control method process flow diagram that plasma of the present invention shows (PDP) module.
Before explanation the present invention constitutes, in order to help to understand principle of work of the present invention, below article on plasma show that average picture level (APL) characteristic of (PDP) module describes.
Plasma shows that (PDP) module is to keep its state by consuming certain electric power, therefore in order to prevent that plasma from showing the infringement of (PDP) module, adjust the picture average brightness value, promptly adjust to be driven and keep number of electrodes according to average picture level { APL (Average Picture Level) }; And average picture level (APL) and be driven keep number of electrodes relation as shown in Figure 2, promptly as seen in Figure 2, average picture level (APL) be driven the inversely proportional relation of the number of keeping number of electrodes, it is average picture level (APL) as a result, and promptly picture brightness can be kept number of electrodes and judges with being driven.
Plasma of the present invention shows the control device for transformer of (PDP) module, is to be made of following part as shown in Figure 3: the driving power that produces diversified level is offered the transformer 33 that plasma shows (PDP) module 30; The controller IC (IC) 32 that is provided with for the frequency adjustment work of the feedback current of carrying out transformer 33 according to control signal; And, brightness decides being driven of (PDP) module 30 of plasma demonstration to keep number of electrodes according to received image signal, and keep number of electrodes, the microprocessor 31 that is provided with in order to export the control signal that 32 frequency adjustment work are connected/closed to controller IC (IC) according to being driven.
The plasma of the present invention of above-mentioned formation shown is described as follows the transformer control method of (PDP) module with reference to Fig. 4:
At first, microprocessor 31 is according to the brightness of picture signal, promptly come to keep number of electrodes and count (S41), and being driven of counting kept number of electrodes (S) whether judge (S42) less than setting value (NO) being driven according to average picture level (APL) information.
Here, so-called setting value (NO) is exactly as shown in Figure 2, the average picture level of present image (APL) value in (" A " reaches " B " interval) two intervals, belongs to being driven of which interval benchmark as judgement and keeps number of electrodes more than " C " is interval and below " C " interval.
At this moment, if average picture level (APL) value at " C " below the interval, then the degree of heat of transformer 33 a little less than, reduce its reliability problems even therefore the frequency of operation of transformer 33 is not adjusted also not produce by feedback current; And if average picture level (APL) is worth at " C " more than the interval, then the degree of heat of transformer 33 is higher, promptly has risk of overheating, and therefore this situation is exactly the situation that the frequency of operation adjustment of transformer 33 is compensated heating according to feedback current.
Therefore, microprocessor 31 will be according to judged result (S42), if being driven of counting kept number of electrodes (S) less than setting value (NO), then, will export (S43) with control signal height (" H ") in order to carry out to controller IC (IC) 32 frequency of operation adjustment work.
Then, controller IC (IC) 32 obtains the feedback of transformer 33 output currents, connects the frequency control function of controller IC (IC), and for the requirement that accords with feedback current frequency is adjusted (S44).
In addition, judged result (S42) if being driven of counting kept number of electrodes (S) more than setting value (NO), then in order not carry out controller IC (IC) 32 frequency of operation adjustment work, is exported (S45) with low with control signal (" L ").
Then, controller IC (IC) 32 maintains current transformer (33) state (S46) with the frequency of operation of transformer 33.
Described setting value is to consider that the benchmark of setting after the transformer heat generation is driven to keep number of electrodes.
Claims (3)
1. the control device for transformer of plasma display module is characterized in that it is to be made of following part:
The driving power that produces diversified level is offered the transformer of plasma display module;
The controller IC (IC) that is provided with for the frequency adjustment work of carrying out the transformer feedback electric current according to control signal;
Brightness decides being driven of plasma display module to keep number of electrodes according to received image signal, and keeps number of electrodes according to being driven, the microprocessor that the control signal of controller IC frequency adjustment work being connected/being closed for output is provided with.
2. the transformer control method of plasma display module, it is characterized in that having the controller IC the frequency of operation of transformer controlled according to the feedback current of transformer and the plasma display module that is driven the microprocessor of keeping number of electrodes of decision plasma display module, its transformer control method was made up of the following stage:
Microprocessor is kept number of electrodes and whether is carried out the judgement stage less than setting value being driven, and setting value is to consider that the benchmark of setting after the transformer heat generation is driven to keep number of electrodes;
Microprocessor will be according to its judged result, microprocessor output control signal, and this control signal is connected the Control work of controller IC control transformer frequency of operation;
Controller IC will carry out the adjusting stage to the transformer frequency of operation according to microprocessor control signal.
3. the transformer control method of plasma display module according to claim 2 is characterized in that it also comprises the following stage:
If being driven and keeping number of electrodes is more than the setting value, then microprocessor is exported control signal, this control signal is connected the Control work of controller IC control transformer frequency of operation, controller IC will be according to microprocessor control signal, to carry out the maintenance stage with current state to the frequency of operation of transformer;
When microprocessor judges goes out to be driven to keep number of electrodes is setting value when following, then connects the frequency control function of controller IC to transformer, and for the requirement that accords with feedback current frequency is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100466110A CN100412924C (en) | 2005-06-09 | 2005-06-09 | Control device for transformer of plasma display module and method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100466110A CN100412924C (en) | 2005-06-09 | 2005-06-09 | Control device for transformer of plasma display module and method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1877669A CN1877669A (en) | 2006-12-13 |
| CN100412924C true CN100412924C (en) | 2008-08-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100466110A Expired - Fee Related CN100412924C (en) | 2005-06-09 | 2005-06-09 | Control device for transformer of plasma display module and method therefor |
Country Status (1)
| Country | Link |
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| CN (1) | CN100412924C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504979A (en) * | 2002-11-28 | 2004-06-16 | ��ʿͨ������������ʾ���ɷ�����˾ | Capacitive load drive recovery circuit, capacitive load drive circuit and plasma display apparatus using the same |
| CN1514424A (en) * | 2002-12-31 | 2004-07-21 | Lg.菲利浦Lcd株式会社 | Panel display for small scale mode application |
| US20050088376A1 (en) * | 2003-10-28 | 2005-04-28 | Matsushita Electric Industrial Co., Ltd. | Capacitive load driver and plasma display |
-
2005
- 2005-06-09 CN CNB2005100466110A patent/CN100412924C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1504979A (en) * | 2002-11-28 | 2004-06-16 | ��ʿͨ������������ʾ���ɷ�����˾ | Capacitive load drive recovery circuit, capacitive load drive circuit and plasma display apparatus using the same |
| CN1514424A (en) * | 2002-12-31 | 2004-07-21 | Lg.菲利浦Lcd株式会社 | Panel display for small scale mode application |
| US20050088376A1 (en) * | 2003-10-28 | 2005-04-28 | Matsushita Electric Industrial Co., Ltd. | Capacitive load driver and plasma display |
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| Publication number | Publication date |
|---|---|
| CN1877669A (en) | 2006-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: LG ELECTRONICS (NANJING) PLASMA CO., LTD. Free format text: FORMER OWNER: LG ELECTRONICS (SHENYANG) CO., LTD. Effective date: 20070316 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20070316 Address after: 210046 Hengtong Datong 77, Nanjing economic and Technological Development Zone, Jiangsu Applicant after: LG Electronics (Nanjing) Plasma Co., Ltd. Address before: 110179 No. 3540 hi tech Development Zone, Liaoning, Shenyang Applicant before: LG Electronic (Shenyang) Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NANJING LG XINGANG DISPLAY CO., LTD. Free format text: FORMER OWNER: LG ELECTRONICS (NANJING) PLASMA CO., LTD. Effective date: 20090515 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090515 Address after: No. 346 Yao Yao Road, Nanjing economic and Technological Development Zone, Jiangsu Patentee after: LG Electronics Nanjing Display Co., Ltd. Address before: No. 77 Hengtong Road, Nanjing economic and Technological Development Zone, Jiangsu Patentee before: LG Electronics (Nanjing) Plasma Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080820 Termination date: 20110609 |