CN101055355A - Display device and its signal control method - Google Patents
Display device and its signal control method Download PDFInfo
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- CN101055355A CN101055355A CN 200610060272 CN200610060272A CN101055355A CN 101055355 A CN101055355 A CN 101055355A CN 200610060272 CN200610060272 CN 200610060272 CN 200610060272 A CN200610060272 A CN 200610060272A CN 101055355 A CN101055355 A CN 101055355A
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Abstract
The invention relates to a display device and the signal transmission process thereof, which includes the following steps: a. a RGB signal is incepted and transfered; b. the RGB signal is converted into a YCbCr signal of different sampling rate; c. the YCbCr signal is transferred; d. the YCbCr signal is reverted into the RGB signal for the image displaying. Different YCbCr signal are used in the signal transmission and deposit process in the display device of the invention, which the data bulk is smaller than the signal transmission and deposit process of the RGB signal, so that, the frequency width is saved.
Description
[technical field]
The present invention relates to a kind of display device and method for transmitting signals thereof, especially about a kind of liquid crystal indicator and method for transmitting signals thereof.
[background technology]
Liquid crystal indicator has characteristics such as low diathermaneity, compact and power consumption are low, and is therefore day by day extensive in the use, and along with the ripe and innovation of correlation technique, its kind is various day by day.
In the signals transmission of prior art liquid crystal indicator, generally transmission all is rgb signal.See also Fig. 1, it is a kind of circuit module synoptic diagram that adopts the liquid crystal indicator of rgb signal transmission mode.This liquid crystal indicator 1 comprises a video signal processing board (Scaler Board) 11 and one liquid crystal display module (LiquidCrystal Display Module, LCM) 12.This video signal processing board 11 comprises an analog to digital converter (Analog-to-Digital Converter, ADC) 111, one transition minimized differential signaling receiver (Transition Minimized Differential Signaling, TMDS) 112, one multi-function device (Multiplexer) 113, a frequency divider (Scaler) 114 and a low-voltage differential signal transmitter (Low Voltage Differential Signaling, LVDS) 115.This liquid crystal display module 12 comprises a differential signal receiver in low voltage 121, time schedule controller (Timing Controller, T-Con) 122, one data driver 123, one scan driver 124 and a liquid crystal panel 125.
Extraneous analog rgb signal is converted to the digital rgb signal and is input to this multi-function device 113 by this analog to digital converter 111, extraneous digital rgb signal then is input to this multi-function device 113 by this transition minimized differential signaling receiver 112, these multi-function device 113 receiving inputted signals also export this frequency divider 114 to, rgb signal after the conversion is handled and exported to 114 pairs of these input signals of this frequency divider to this low-voltage differential signal transmitter 115, and the rgb signal after this low-voltage differential signal transmitter 115 will be changed is converted to the low-voltage differential signal of representing RGB information and transmits to this liquid crystal display module 12.The differential signal receiver in low voltage 121 of this liquid crystal display module 12 receives this low-voltage differential signal and it is reduced to rgb signal, rgb signal after this reduction is input to this time schedule controller 122,122 pairs of these rgb signals of this time schedule controller are handled and respectively to this data driver 123 and this scanner driver 124 output rgb signal and control signals, this data driver 123 and this scanner driver 124 corresponding rgb signals of output and control signal are to control this liquid crystal panel 125 display images.
Be to improve the response speed of liquid crystal molecule, have the part liquid crystal indicator to adopt overdrive technique (OverDrive) at present, a kind of liquid crystal indicator that adopts overdrive technique as shown in Figure 2.This liquid crystal indicator 2 increases by a signal processing circuit 24 on the basis of liquid crystal indicator shown in Figure 1, this signal processing circuit 24 comprises a Memory Controller Hub 241, an internal memory 242 and a signal processor 243.This signal processing circuit 24 is serially connected between the time schedule controller 222 and data driver 223 of this liquid crystal display module 22.This Memory Controller Hub 241 receives by one of this time schedule controller 222 inputs frame RGB image information and writes this internal memory 242, these Memory Controller Hub 241 this frame of control RGB image informations keep a frame in this internal memory 242 time, afterwards, this Memory Controller Hub 241 is read this frame RGB image information and is received the next frame RGB image information of being imported by this time schedule controller 222 simultaneously from this internal memory 242, this two frame RGB image information is sent into this signal processor 243 simultaneously, RGB image information after the processing is handled and exported to 243 pairs of these two frames of this signal processor RGB image information to this data driver 223, and this data driver 223 receives these RGB image informations and exports corresponding rgb signal these liquid crystal panel 225 shown images are compensated.
In this liquid crystal indicator 1, what the low-voltage differential signal that this video signal processing board 11 is transmitted to this liquid crystal display module 12 was represented is rgb signal; And in the liquid crystal indicator 2 that adopts overdrive technique, the image information that internal memory 242 stores also is a rgb signal.This R component, G component and B component have identical sampling rate, and therefore, the data volume of transmission in signal transmission, the storage process, storage is bigger in the prior art, and the shared frequency range of signal is bigger.
[summary of the invention]
In order to solve in the prior art the bigger problem of the shared frequency range of signal in signal transmission, the storage process, be necessary to provide a kind of display device method for transmitting signals that can save frequency range.
Be necessary to provide a kind of display device that adopts this method for transmitting signals simultaneously.
A kind of display device method for transmitting signals, it may further comprise the steps: a. receives and the transmission rgb signal; B. this rgb signal is converted to the different YCbCr signal of sampling rate; C. transmit this YCbCr signal; D. this YCbCr signal being reduced to rgb signal shows in order to realize image.
A kind of display device, it comprises: a video signal processing board, it is used for receiving and transmission video signal; One matrixer, it is used for rgb signal is converted to the different YCbCr signal of sampling rate; One inverse matrix change-over circuit, it is used for the YCbCr signal that sampling rate is different and is reduced to rgb signal; One shows module, and it is used to handle vision signal and realizes that image shows.
Compare with prior art, what adopt in signal transmission of the present invention, the storage process is the different YCbCr signal of sampling rate, less compared to the data volume of rgb signal transmission, storage, thereby reaches the purpose of saving frequency range.Display device more and more develops to the large scale direction now, so compared to prior art, the present invention can reduce the volume of associated component, thereby makes display device become lighter, thinner.
[description of drawings]
Fig. 1 is a kind of circuit module synoptic diagram of prior art liquid crystal indicator.
Fig. 2 is a kind of circuit module synoptic diagram of liquid crystal indicator of available technology adopting overdrive technique.
Fig. 3 is the schematic diagram that liquid crystal indicator method for transmitting signals of the present invention is saved frequency range.
Fig. 4 is the circuit module synoptic diagram that adopts liquid crystal indicator first embodiment of method for transmitting signals of the present invention.
Fig. 5 is the circuit module synoptic diagram that adopts liquid crystal indicator second embodiment of method for transmitting signals of the present invention.
Fig. 6 is the circuit module synoptic diagram that adopts liquid crystal indicator the 3rd embodiment of method for transmitting signals of the present invention.
Fig. 7 is the circuit module synoptic diagram that adopts liquid crystal indicator the 4th embodiment of method for transmitting signals of the present invention.
Fig. 8 is the circuit module synoptic diagram that adopts liquid crystal indicator the 5th embodiment of method for transmitting signals of the present invention.
[embodiment]
The invention provides a kind of liquid crystal indicator method for transmitting signals, it may further comprise the steps:
A. receive and transmit rgb signal;
B. rgb signal is converted to the different YCbCr signal of sampling rate;
C. transmit this YCbCr signal;
D. this YCbCr signal being reduced to rgb signal shows in order to realize image.
Wherein, step b realizes by a matrixer; Steps d realizes by an inverse matrix change-over circuit.
The principle of liquid crystal indicator method for transmitting signals saving frequency range of the present invention as shown in Figure 3.What adopt in the prior art signals transmission is rgb signal, and each pixel comprises a R component, a G component and a B component, and during data transmission, each component accounts for a byte, and then transmitting four pixels needs 12 bytes altogether.What adopt in the signals transmission of the present invention is the YCbCr signal, when data are transmitted with the 4:2:0 sampling mode, each group is shared a Cb component and a Cr component by four pixels of 2 * 2 arranged, each pixel comprises a Y component, each component accounts for a byte, and then transmitting four pixels needs 6 bytes altogether.Therefore, when adopting 4:2:0 sampling mode transmission data, data quantity transmitted is original 1/2nd, thereby reaches the purpose of saving frequency range.
The YCbCr signal also can adopt 4:2:2 or 4:1:1 sampling mode in signals transmission, and its data quantity transmitted is respectively to adopt 2/3 or 1/2 of rgb signal.
The liquid crystal indicator of the above-mentioned method for transmitting signals of specific implementation has numerous embodiments, sees also Fig. 4, and it is the circuit module synoptic diagram that adopts liquid crystal indicator first embodiment of method for transmitting signals of the present invention.This liquid crystal indicator 3 comprises a video signal processing board 31 and a liquid crystal display module 32.This video signal processing board 31 comprises an analog to digital converter 311, a transition minimized differential signaling receiver 312, a multi-function device 313, a frequency divider 314 and a low-voltage differential signal transmitter 315.This frequency divider 314 further comprises a matrixer 316.This liquid crystal display module 32 comprises a differential signal receiver in low voltage 321, time schedule controller 322, a data driver 323, one scan driver 324 and a liquid crystal panel 325.This data driver 323 further comprises an inverse matrix change-over circuit 327.
Extraneous analog rgb signal is converted to digital signal and is input to this multi-function device 313 by this analog to digital converter 311, extraneous digital rgb signal then is input to this multi-function device 313 by this transition minimized differential signaling receiver 312, these multi-function device 313 receiving inputted signals also export this frequency divider 314 to, rgb signal after 314 pairs of these input signals of this frequency divider are handled and further output is changed is to this matrixer 316, this matrixer 316 is converted to this rgb signal corresponding YCbCr signal and is sent to this low-voltage differential signal transmitter 315, and this low-voltage differential signal transmitter 315 is the low-voltage differential signal of representative YCbCr information with this YCbCr conversion of signals and transmits to this liquid crystal display module 32.The differential signal receiver in low voltage 321 of this liquid crystal display module 32 receives this low-voltage differential signal and it is reduced to the YCbCr signal, YCbCr signal after this reduction is input to this time schedule controller 322,322 pairs of these YCbCr signals of this time schedule controller are handled and are exported the YCbCr signals to this data driver 323, simultaneously to these scanner driver 324 output control signals, the YCbCr signal that the inverse matrix change-over circuit 327 of these data driver 323 inside will be imported is reduced to rgb signal, and this data driver 323 and this scanner driver 324 corresponding rgb signals of output and control signal are to control this liquid crystal panel 325 display images.
See also Fig. 5, it is the circuit module synoptic diagram that adopts liquid crystal indicator second embodiment of method for transmitting signals of the present invention.The circuit module of this liquid crystal indicator 5 and first embodiment is roughly the same, and its difference is: serial connection one signal processing circuit 54 between the time schedule controller 522 of this liquid crystal display module 52 and data driver 523.This signal processing circuit 54 comprises a Memory Controller Hub 541, an internal memory 542 and a signal processor 543.This Memory Controller Hub 541 receives by one of this time schedule controller 522 inputs frame YCbCr image information and writes this internal memory 542, these Memory Controller Hub 541 this frame of control YCbCr image informations keep a frame in this internal memory 542 time, afterwards, this Memory Controller Hub 541 is read this frame YCbCr image information and is received the next frame YCbCr image information of being imported by this time schedule controller 522 from this internal memory 542, this two frame YCbCr image information is sent into this signal processor 543 simultaneously, YCbCr image information after the processing is handled and exported to 543 pairs of these two frames of this signal processor YCbCr image information to this data driver 523, and this data driver 523 receives these YCbCr image informations and exports corresponding rgb signal these liquid crystal panel 525 shown images are compensated.
Seeing also Fig. 6, is the circuit module synoptic diagram that adopts liquid crystal indicator the 3rd embodiment of method for transmitting signals of the present invention.The structure of this liquid crystal indicator 6 and first embodiment is roughly the same, and its difference is: this matrixer 6221 is arranged in this time schedule controller 622.
Seeing also Fig. 7, is the circuit module synoptic diagram that adopts liquid crystal indicator the 4th embodiment of method for transmitting signals of the present invention.The circuit module of this liquid crystal indicator 7 and the 3rd embodiment is roughly the same, and its difference is: serial connection one signal processing circuit 74 between the time schedule controller 722 of this liquid crystal display module 72 and data driver 723.This signal processing circuit 74 comprises a Memory Controller Hub 741, an internal memory 742 and a signal processor 743.This Memory Controller Hub 741 is connected with this internal memory 742 and this signal processor 743 respectively, and this Memory Controller Hub 741 is connected with this time schedule controller 722 simultaneously, and this signal processor 743 is connected with this data driver 723 simultaneously.
Seeing also Fig. 8, is the circuit module synoptic diagram that adopts liquid crystal indicator the 5th embodiment of method for transmitting signals of the present invention.This liquid crystal indicator 8 comprises a video signal processing board 81 and a liquid crystal display module 82.This video signal processing board 81 comprises an analog to digital converter 811, a transition minimized differential signaling receiver 812, a multi-function device 813, a frequency divider 814 and a low-voltage differential signal transmitter 815.This liquid crystal display module 82 comprises a differential signal receiver in low voltage 821, time schedule controller 822, a data driver 823, one scan driver 824 and a liquid crystal panel 825; This liquid crystal display module 82 further comprises a signal processing circuit 84.This signal processing circuit 84 comprises a Memory Controller Hub 841, an internal memory 842, a signal processor 843, a matrixer 845 and an inverse matrix change-over circuit 846.This signal processing circuit 84 is serially connected between this time schedule controller 822 and this data driver 823.
Extraneous analog rgb signal is converted to the digital rgb signal and is input to this multi-function device 813 by this analog to digital converter 811, extraneous digital rgb signal then is input to this multi-function device 813 by this transition minimized differential signaling receiver 812, these multi-function device 813 receiving inputted signals also export this frequency divider 814 to, rgb signal after the conversion is handled and exported to 814 pairs of these input signals of this frequency divider to this low-voltage differential signal transmitter 815, and the rgb signal after this low-voltage differential signal transmitter 815 will be changed is converted to the low-voltage differential signal of representing RGB information and transmits to this liquid crystal display module 82.The differential signal receiver in low voltage 821 of this liquid crystal display module 82 receives this low-voltage differential signal and it is reduced to rgb signal, rgb signal after this reduction is input to this time schedule controller 822,822 pairs of these rgb signals of this time schedule controller are handled and to this data driver 823 and this scanner driver 824 output rgb signal and control signals, this data driver 823 and this scanner driver 824 corresponding rgb signals of output and control signal are to control this liquid crystal panel 825 display images.
This matrixer 845 receives by one of this time schedule controller 822 inputs frame RGB image information and is converted into a frame YCbCr image information, and sampling mode can adopt 4:2:2,4:2:0,4:1:1 etc.This Memory Controller Hub 841 receives this frame YCbCr image information and writes this internal memory 842, these Memory Controller Hub 841 this frame of control YCbCr image informations keep a frame in this internal memory 842 time, afterwards, this Memory Controller Hub 841 is read this frame YCbCr image information and is received next frame YCbCr image information from this matrixer 845 from this internal memory 842, this two frame YCbCr image information is sent into this signal processor 843 simultaneously, YCbCr image information after the processing is handled and exported to 843 pairs of these two frames of this signal processor YCbCr image information to this inverse matrix change-over circuit 846, this inverse matrix change-over circuit 846 is converted to this YCbCr image information corresponding RGB image information and exports this data driver 823 to, this data driver 823 receives this RGB image information and handles, and exports corresponding rgb signal these liquid crystal panel 825 shown images are compensated.
Be compared with existing technology, what adopt in signal transmission of the present invention, the storage process is The YCbCr signal that sampling rate is different is compared to the data of rgb signal transmission, storage Measure littler, thereby reach the purpose of saving frequency range. Liquid crystal indicator more and more now To the large scale future development, advantage of the present invention also becomes increasingly conspicuous. Compared to existing skill Art, the present invention can reduce the volume of associated component, thereby liquid crystal indicator is become Lighter, thinner.
Claims (11)
1. display device method for transmitting signals, it may further comprise the steps: a. receives also transmission rgb signal; B. this rgb signal is converted to the different YCbCr signal of sampling rate; C. transmit this YCbCr signal; D. this YCbCr signal being reduced to rgb signal shows in order to realize image.
2. display device method for transmitting signals as claimed in claim 1 is characterized in that, and: step b realizes that by a matrixer steps d realizes by an inverse matrix change-over circuit.
3. as each described display device method for transmitting signals in the claim 1 to 2, it is characterized in that: be converted in the process of the different YCbCr signal of sampling rate at rgb signal, sampling mode one of can adopt 4: 2: 2,4: 2: 0,4: 1: 1.
4. display device that adopts the described display device method for transmitting signals of claim 1, it comprises: a video signal processing board, it is used for receiving and transmission video signal, one shows module, it is used to handle vision signal and realizes that image shows, it is characterized in that: this display device comprises a matrixer, and it is used for rgb signal is converted to the different YCbCr signal of sampling rate; One inverse matrix change-over circuit, it is used for the YCbCr signal that sampling rate is different and is reduced to rgb signal.
5. display device as claimed in claim 4, it is characterized in that: this display device is a liquid crystal indicator, this liquid crystal indicator comprises a video signal processing board and a liquid crystal display module, this video signal processing board comprises an analog to digital converter, one transition minimized differential signaling receiver, one multi-function device, one frequency divider and a low-voltage differential signal transmitter, independent respectively and this multi-function device series connection of this analog to digital converter and this transition minimized differential signaling receiver, this multi-function device, frequency divider and this low-voltage differential signal transmitter are connected in series successively, this liquid crystal display module comprises a differential signal receiver in low voltage, time schedule controller, the one scan driver, one data driver and a liquid crystal panel, this differential signal receiver in low voltage and the series connection of this time schedule controller, this time schedule controller is connected with this liquid crystal panel by this scanner driver and this data driver respectively.
6. display device as claimed in claim 5 is characterized in that: this matrixer is arranged in the frequency divider of this video signal processing board; This inverse matrix change-over circuit is arranged in the data driver of this liquid crystal display module.
7. display device as claimed in claim 6, it is characterized in that: this liquid crystal indicator further comprises a signal processing circuit, this signal processing circuit comprises a Memory Controller Hub, an internal memory and a signal processor, this Memory Controller Hub is connected with this internal memory and this signal processor respectively, this Memory Controller Hub is connected with this time schedule controller simultaneously, and this signal processor is connected with this data driver simultaneously.
8. display device as claimed in claim 5 is characterized in that: this matrixer is arranged in the time schedule controller of this liquid crystal display module; This inverse matrix change-over circuit is arranged in the data driver of this liquid crystal display module.
9. display device as claimed in claim 8, it is characterized in that: this liquid crystal indicator further comprises a signal processing circuit, this signal processing circuit comprises a Memory Controller Hub, an internal memory and a signal processor, this Memory Controller Hub is connected with this internal memory and this signal processor respectively, this Memory Controller Hub is connected with this time schedule controller simultaneously, and this signal processor is connected with this data driver simultaneously.
10. display device as claimed in claim 5, it is characterized in that: this liquid crystal indicator further comprises a signal processing circuit, this signal processing circuit comprises a Memory Controller Hub, an internal memory and a signal processor, this matrixer, Memory Controller Hub, signal processor and inverse matrix change-over circuit are serially connected successively, this internal memory is connected with this Memory Controller Hub separately, this matrixer is connected with this time schedule controller simultaneously, and this inverse matrix change-over circuit is connected with this data driver simultaneously.
11. as each described display device in the claim 4 to 10, it is characterized in that: be converted in the process of the different YCbCr signal of sampling rate at rgb signal, sampling mode one of can adopt 4: 2: 2,4: 2: 0,4: 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100602726A CN100516990C (en) | 2006-04-12 | 2006-04-12 | Liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100602726A CN100516990C (en) | 2006-04-12 | 2006-04-12 | Liquid crystal display device |
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| CN101055355A true CN101055355A (en) | 2007-10-17 |
| CN100516990C CN100516990C (en) | 2009-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100602726A Expired - Fee Related CN100516990C (en) | 2006-04-12 | 2006-04-12 | Liquid crystal display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763844B (en) * | 2008-12-23 | 2012-12-26 | 乐金显示有限公司 | Method and apparatus for correcting color of display device |
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2006
- 2006-04-12 CN CNB2006100602726A patent/CN100516990C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101763844B (en) * | 2008-12-23 | 2012-12-26 | 乐金显示有限公司 | Method and apparatus for correcting color of display device |
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| CN100516990C (en) | 2009-07-22 |
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Granted publication date: 20090722 Termination date: 20170412 |