CN102768620B - Transmission method and transmission device for display data - Google Patents
Transmission method and transmission device for display data Download PDFInfo
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- CN102768620B CN102768620B CN201110306987.6A CN201110306987A CN102768620B CN 102768620 B CN102768620 B CN 102768620B CN 201110306987 A CN201110306987 A CN 201110306987A CN 102768620 B CN102768620 B CN 102768620B
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- display data
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- clock signal
- crystal oscillator
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Abstract
The invention discloses a transmission method for display data. The method comprises that a timer/counter control register (TCON) adjusts clock frequency of a crystal oscillator unit of the register, and the clock frequency is matched with a signal of the display data outputted by a display card of communication equipment; and when the signal of the display data is acquired, the TCON adopts a clock signal generated by the crystal oscillator unit to be used as a clock signal corresponding to the display data outputted by the display card. The invention also discloses a transmission device for the display data. By the method and the device, interference of the clock signal to a wireless signal can be reduced effectively, and integrity of receiving of the display data further can be guaranteed effectively.
Description
Technical field
The present invention relates to signal transmission technology, refer to a kind of transmission method and the device that show data especially.
Background technology
At present, various portable communication device is mobile phone, notebook, GPS (GPS such as, Global Positioning System) etc., all carry out data transmission by wireless signal, and the signal transmission form between the video card of these equipment and liquid crystal display is generally Low Voltage Differential Signal (LVDS, Low-Voltage Differential Signaling) transmission mode, as shown in Figure 1, LVDS transmission mode comprises clock cable (CLK) and display data signal line usually; Wherein, display data signal line comprises: LV0, LV1 and LV2, the receiving end of liquid crystal display is by receiving the clock signal of video card, display on data line is gathered, and carries out the work such as data analysis, so far, complete the transmission of display data signal between system end and liquid crystal display, here, described receiving end refers to timer/counter control register (TCON, Timer Control Register) exactly.
But, for traditional LVDS transmission mode, owing to containing CLK, the clock signal of its transmission belongs to the high-frequency signal in liquid crystal display, and, liquid crystal display is when normally working, need the transmission carrying out high-frequency signal all the time, so, can impact the work of the wireless module of communication facilities, in other words, the clock signal of transmission can cause interference to the reception of wireless signal.
In addition, traditional LVDS transmission mode, clock signal may decay or be subject to external influence and change in transmitting procedure, like this, the receiving end of liquid crystal display can be caused to carry out data acquisition according to the clock signal of mistake, thus the loss showing data can be caused.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of transmission method and the device that show data, effectively can reduce the interference that clock signal produces wireless signal.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of transmission method showing data, the method comprises:
TCON adjusts the clock frequency of the crystal oscillator unit of self, and the signal of the display data exported with the video card of communication facilities matches;
When gathering display data signal, the clock signal that the display data that the clock signal that TCON adopts crystal oscillator unit to produce exports as described video card are corresponding.
Present invention also offers a kind of transmitting device showing data, this device comprises: crystal oscillator unit and collecting unit; Wherein,
Crystal oscillator unit, for generation of clock signal;
Collecting unit, for adjusting the clock frequency of crystal oscillator unit, the signal of the display data exported with the video card of communication facilities matches; And when gathering display data signal, the clock signal that the display data that the clock signal adopting crystal oscillator unit to produce exports as described video card are corresponding.
The transmission method of display data provided by the invention and device, TCON adjusts the clock frequency of the crystal oscillator unit of self, and the signal of the display data exported with the video card of communication facilities matches; When gathering display data signal, the clock signal that the display data that the clock signal that crystal oscillator unit after TCON adopts adjustment produces exports as described video card are corresponding, when carrying out the transmission showing data, the video card of communication facilities does not need to clock signal corresponding to TCON transmitting display data, so, the interference that clock signal produces wireless signal can effectively be reduced; Meanwhile, when carrying out the transmission showing data, not carrying out the transmission of corresponding clock signal, so, effectively can ensure the integrality showing data receiver.
In addition, in the gatherer process of display data signal, the clock frequency of crystal oscillator unit described in TCON timing adjustment, the signal of the display data exported with video card matches, and so, can ensure the integrality showing data receiver further.
Accompanying drawing explanation
Fig. 1 is traditional LVDS transmission mode schematic diagram;
Fig. 2 is the transmission method schematic diagram that the present invention shows data;
When Fig. 3 is communication facilities initialization of the present invention, the transmission method schematic diagram of clock signal;
Fig. 4 is the transmission mode schematic diagram showing data after adopting technical scheme provided by the invention;
Fig. 5 is the transmitting device structural representation that the present invention shows data.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described in more detail.
The present invention shows the transmission method of data, as shown in Figure 2, comprises the following steps:
Step 201:TCON adjusts the clock frequency of the crystal oscillator unit of self, and the signal of the display data exported with the video card of communication facilities matches;
As shown in Figure 3, particularly, during communication facilities opening initialization, video card is by display data signal alignment TCON transmit clock signal, TCON, according to the clock signal collected, adjusts the clock frequency of described crystal oscillator unit, identical with the frequency of the clock signal collected; In figure 3, LV0, LV1 and LV2 are display data signal line, adopt LV0 to TCON transmit clock signal, and LV1 and LV2 transmit blank signal;
Wherein, described display data signal line is pair of data lines, and during practical application, when carrying out display data transmissions, pair of data lines forms a display data signal line, therefore, adopts pair of data lines transmit clock signal; The concrete processing procedure of video card by display data signal alignment TCON transmit clock signal is identical with the concrete processing procedure by display data signal alignment TCON transmitting display data signal;
When video card is to TCON transmit clock signal, can keep one section of duration, the duration due to communication facilities opening initialization is generally the duration of 1 ~ 2 frame, and therefore, the duration of transmit clock signal is generally 1 ~ 2 frame, also can arrange as required;
Here, at present, liquid crystal display has usually burn-in test (Aging Test) pattern, the principle of this pattern is: at liquid crystal display electric power starting, and while there is no outside clock signal, the picture of display inner setting, that is: white (White)-> black (Black)-> red (Red)-> green (Green)-> indigo plant (Blue) etc., now, owing to there is no outside clock signal, therefore, TCON employs the clock signal of clock signal as outside of crystal oscillator unit generation when carrying out data acquisition, therefore, the clock signal that crystal oscillator unit can be adopted to produce is as the clock signal corresponding to signal of display data, simultaneously, according to the system architecture of current most communication facilities, in traditional LVDS transmission mode, video card can carry out exhibition process frequently to clock signal usually, to reduce the interference that clock signal produces, here, describedly carry out opening up frequently process and refer to: the frequency of the clock signal that video card exports is centered by the initial set value of liquid crystal display, frequency fluctuates.Therefore, when video card not transmit clock signal time, just require that the internal clock signal of liquid crystal display also can produce spread spectrum signal, in other words, just require that the signal of the display data that the clock frequency of crystal oscillator unit will export with video card matches, so, the correct collection of guarantee display data.
Step 202: when gathering display data signal, the clock signal that the display data that the clock signal that TCON adopts crystal oscillator unit to produce exports as described video card are corresponding;
Here, video card still adopts the display data alignment TCON transmitting display data of prior art, and not to TCON transmit clock signal;
The method can further include:
In the gatherer process of display data signal, the clock frequency of crystal oscillator unit described in TCON timing adjustment, the signal of the display data exported with video card matches;
Particularly, the display data transmissions complete when 1 frame terminates, and after reset (Reset) Signal transmissions terminates, video card is by described display data signal alignment TCON transmit clock signal, TCON is according to the clock signal collected, and the clock frequency adjusting described crystal oscillator unit is identical with the frequency of the clock signal collected;
Here, due to current communication facilities such as notebook, when being same picture for a long time, the refreshing frequency of liquid crystal display can be reduced, general meeting changes between 60Hz ~ 40Hz, now, in traditional LVDS transmission mode, video card can change clock signal corresponding to display data, therefore, the signal of the display data exported to make the frequency of crystal oscillator unit and video card can match in real time, that is: be consistent in real time with the frequency of the clock signal of video card, timing is just needed to detect the frequency of the clock signal of video card, and adjust the clock frequency of crystal oscillator unit in time, and, after the display data transmissions that 1 frame is complete terminates, video card can transmit certain clear data to TCON, Reset signal is transmitted again afterwards to TCON, after transferring Reset signal, and before the display data of transmission next frame, have one section of blank time, this section of blank time can be utilized to TCON transmit clock signal, after TCON knows that Reset Signal transmissions completes in advance, the signal of transmission is clock signal,
The method can further include:
TCON analyzes the display data signal collected; Wherein, the concrete processing procedure analyzed the display data signal collected is prior art, repeats no more here.
After adopting the transmission method of display data provided by the invention, as shown in Figure 4, in the process of transmitting display data, no longer need video card clocking, and transfer to TCON, TCON only needs the clock signal collection display data produced according to crystal oscillator unit, and wherein, the dotted portion in Fig. 4 represents removal clock cable, that is: independent clock signal transmission is removed, so, significantly reduce the interference that clock signal produces wireless signal, and the loss of display data can not be caused.
For realizing said method, present invention also offers a kind of transmitting device showing data, as shown in Figure 5, this device comprises: crystal oscillator unit 51 and collecting unit 52; Wherein,
Crystal oscillator unit 51, for generation of clock signal;
Collecting unit 52, for adjusting the clock frequency of crystal oscillator unit 51, the signal of the display data exported with the video card of communication facilities matches; And when gathering display data signal, the clock signal that the display data that the clock signal adopting crystal oscillator unit 51 to produce exports as described video card are corresponding.
Here, it should be noted that: crystal oscillator unit 51 and collecting unit 52 are the logical block of TCON.
Wherein, described collecting unit 52, also in the gatherer process of display data signal, the clock frequency of timing adjustment crystal oscillator unit 51, the signal of the display data exported with video card matches.
Wherein, this device can further include video card 53, during for communication facilities opening initialization, by display data signal alignment collecting unit 52 transmit clock signal;
Described collecting unit 52, specifically for: after receiving the clock signal of video card 53 transmission, according to the clock signal collected, the clock frequency of adjustment crystal oscillator unit 51 is identical with the frequency of the clock signal collected.
Described video card 53, also terminates for the display data transmissions complete when 1 frame, and after Reset Signal transmissions terminates, by described display data signal alignment collecting unit 52 transmit clock signal.
This device can further include analytic unit, for receive collecting unit 52 send comprise the display data signal of clock signal after, the display data signal collected is analyzed;
Described collecting unit 52, also for the display data signal comprising clock signal collected is sent to analytic unit.
Here, it should be noted that: described analytic unit is the logical block of TCON.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (8)
1. show a transmission method for data, it is characterized in that, the method comprises:
Timer/counter control register (TCON) adjusts the clock frequency of the crystal oscillator unit of self, and the signal of the display data exported with the video card of communication facilities matches;
When gathering display data signal, the clock signal that the display data that the clock signal that TCON adopts crystal oscillator unit to produce exports as described video card are corresponding;
Wherein, described TCON adjusts the clock frequency of the crystal oscillator unit of self, and the signal of the display data exported with the video card of communication facilities matches, for:
During communication facilities opening initialization, described video card is by display data signal alignment TCON transmit clock signal;
TCON, according to the clock signal collected, adjusts the clock frequency of described crystal oscillator unit, identical with the frequency of the clock signal collected.
2. method according to claim 1, is characterized in that, the method comprises further:
In the gatherer process of display data signal, the clock frequency of crystal oscillator unit described in TCON timing adjustment, the signal of the display data exported with video card matches.
3. method according to claim 2, is characterized in that, the clock frequency of crystal oscillator unit described in described TCON timing adjustment, and the signal of the display data exported with video card matches, for:
The display data transmissions complete when 1 frame terminates, and after reset (Reset) Signal transmissions terminates, video card is by described display data signal alignment TCON transmit clock signal;
TCON is according to the clock signal collected, and the clock frequency adjusting described crystal oscillator unit is identical with the frequency of the clock signal collected.
4. method according to claim 1, is characterized in that, the method comprises further:
TCON analyzes the display data signal collected.
5. show a transmitting device for data, it is characterized in that, this device comprises: crystal oscillator unit and collecting unit; Wherein,
Crystal oscillator unit, for generation of clock signal;
Collecting unit, for adjusting the clock frequency of crystal oscillator unit, the signal of the display data exported with the video card of communication facilities matches; And when gathering display data signal, the clock signal that the display data that the clock signal adopting crystal oscillator unit to produce exports as described video card are corresponding;
Wherein, this device comprises video card further, during for communication facilities opening initialization, by display data signal alignment collecting unit transmit clock signal;
Described collecting unit, specifically for: after receiving the clock signal of video card transmission, according to the clock signal collected, the clock frequency of adjustment crystal oscillator unit is identical with the frequency of the clock signal collected.
6. device according to claim 5, is characterized in that,
Described collecting unit, also in the gatherer process of display data signal, the clock frequency of timing adjustment crystal oscillator unit, the signal of the display data exported with video card matches.
7. device according to claim 5, is characterized in that,
Described video card, also terminates for the display data transmissions complete when 1 frame, and after Reset Signal transmissions terminates, by described display data signal alignment collecting unit transmit clock signal.
8. the device according to claim 5 or 6, is characterized in that, this device comprises analytic unit further, for receive collecting unit send comprise the display data signal of clock signal after, the display data signal collected is analyzed;
Described collecting unit, also for the display data signal comprising clock signal collected is sent to analytic unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110306987.6A CN102768620B (en) | 2011-10-11 | 2011-10-11 | Transmission method and transmission device for display data |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110306987.6A CN102768620B (en) | 2011-10-11 | 2011-10-11 | Transmission method and transmission device for display data |
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| CN102768620A CN102768620A (en) | 2012-11-07 |
| CN102768620B true CN102768620B (en) | 2015-05-20 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103077694B (en) * | 2012-12-20 | 2014-12-24 | 广州视源电子科技股份有限公司 | System and method for removing spreading spectrum from LVDS (low voltage differential signaling) |
| CN109787716B (en) * | 2018-12-19 | 2020-12-29 | 惠科股份有限公司 | Data transmission method and device |
| CN110459188A (en) * | 2019-08-16 | 2019-11-15 | 四川长虹电器股份有限公司 | The processing method of LCD TV TCON timing control signal |
| CN114019268B (en) * | 2021-09-30 | 2023-06-27 | 惠科股份有限公司 | Burn-in test method, device, equipment and storage medium |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1801267A (en) * | 2004-11-06 | 2006-07-12 | 三星电子株式会社 | Apparatus and method for controlling display state |
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| US7088797B2 (en) * | 2002-09-10 | 2006-08-08 | Broadcom Corporation | Phase lock loop with cycle drop and add circuitry |
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| CN1801267A (en) * | 2004-11-06 | 2006-07-12 | 三星电子株式会社 | Apparatus and method for controlling display state |
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