CN104252850A - Source electrode driver - Google Patents
Source electrode driver Download PDFInfo
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- CN104252850A CN104252850A CN201310256141.5A CN201310256141A CN104252850A CN 104252850 A CN104252850 A CN 104252850A CN 201310256141 A CN201310256141 A CN 201310256141A CN 104252850 A CN104252850 A CN 104252850A
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- Liquid Crystal Display Device Control (AREA)
Abstract
The invention relates to a source electrode driver used for driving a display panel. The source electrode driver comprises a data processing circuit, a data transmission interface and a driving channel, wherein the data processing circuit is used for receiving frame data and converting a serial format of the frame data into a parallel format, the data processing circuit is used for copying the frame data, the frame data corresponds to a display frame, the data transmission interface is coupled with the data processing circuit and is used for transmitting the frame data after copy, and the driving channel is coupled with the data transmission interface and is used for receiving the frame data after copy and utilizing the frame data after copy to drive the display panel. For the same display panel, the data bulk of the frame data transmitted by the data transmission interface is greater than the data bulk of the frame data received by the data processing circuit.
Description
Technical field
The invention relates to a kind of drive unit, and relate to a kind of in order to drive the source electrode driver of display panel especially.
Background technology
Liquid crystal display (Liquid Crystal Display, LCD) have that external form is frivolous, power consumption is few and the characteristic such as radiationless pollution, be widely used on the information products such as various computer system, mobile phone, personal digital assistant (PDA).The principle of work system of liquid crystal display utilizes liquid crystal molecule under different ordered state, to light, there is different polarizations or refraction effect, therefore the amount of penetrating of light can be controlled via the liquid crystal molecule of different ordered state, the output light of further generation varying strength, and the red, green, blue of different GTG intensity.
Perform the operation of above-mentioned display image, normally utilize time schedule controller, gate drivers, source electrode driver to carry out driving liquid crystal displays.Generally speaking, liquid crystal display high frame rate (
frame rate) operation under, source electrode driver relatively also needs to operate in higher speed.But when high speed operation, source electrode driver consumes more power, and easily have overheated and electromagnetic interference (EMI) (electromagnetic interference,
eMI) problem.
Summary of the invention
The invention provides a kind of source electrode driver, can power consumption be reduced, and reduce the problem of temperature and electromagnetic interference (EMI).
The present invention proposes a kind of source electrode driver, for driving a display panel.Source electrode driver comprises data processing circuit, data transmission interface and drives passage.Picture data in order to receive picture data, and is converted to parallel form by serial form by data processing circuit.Data processing circuit is in order to copy picture data.The corresponding display frame of picture data.Data transmission interface is coupled to data processing circuit, in order to the picture data after transmission copying.Drive passage to be coupled to data transmission interface, in order to receive the picture data after copying, and utilize the picture data after copying to drive display panel.For same display frame, the data volume of the picture data that data transmission interface transmits is greater than the data volume of the picture data that data processing circuit receives.
In one embodiment of this invention, above-mentioned data processing circuit comprises data converting circuit and a data copy circuit.Picture data in order to receive picture data, and is converted to parallel form by serial form by data converting circuit.Data copy circuit is coupled to data converting circuit, in order to receive the picture data of parallel form, and copies the picture data of parallel form.
In one embodiment of this invention, above-mentioned data processing circuit comprises data copy circuit and data converting circuit.Data copy circuit in order to receive picture data, and copies picture data.Data converting circuit is coupled to data copy circuit, in order to receive the picture data after copying, and the picture data after copying is converted to parallel form by serial form.
The present invention proposes a kind of source electrode driver for driving a display panel.Source electrode driver comprises data converting circuit, data transmission interface and multiple driving passage.Picture data in order to receive picture data, and is converted to parallel form by serial form by data converting circuit.The corresponding display frame of picture data.Data transmission interface is coupled to data converting circuit, in order to transmit picture data.Drive passage to be coupled to data transmission interface, in order to receive picture data, and utilize picture data to drive display panel.For same display frame, store identical picture data driving two driving passages adjacent in passage.
In one embodiment of this invention, above-mentioned each driving passage comprises the first latch unit circuit and the second latch unit circuit.First latch unit circuit is in order to receive and stored picture data.Second latch unit circuit is coupled to the first latch unit circuit, in order to receive and to store the picture data that the first latch unit circuit provides.For same display frame, adjacent two drive the first latch unit circuit of passage receive and store identical picture data.
In one embodiment of this invention, above-mentioned each driving passage comprises the first latch unit circuit and the second latch unit circuit.First latch unit circuit is in order to receive and stored picture data.Second latch unit circuit is coupled to the first latch unit circuit, in order to receive and to store the picture data that the first latch unit circuit provides.Drive in passage at adjacent two, the first latch unit circuit of one of them receives and stored picture data.For same display frame, the described first latch unit circuit of one of them provides picture data to drive the second latch unit circuit of passage to adjacent two, and adjacent two drive the second latch unit circuit of passage receive and store identical picture data.
Based on above-mentioned, in illustrative examples of the present invention, source electrode driver optionally determines whether will copy picture data, to reduce the operating speed of himself, thus reduces power consumption, and reduces the problem of temperature and electromagnetic interference (EMI).
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate institute's accompanying drawings to be described in detail below.
Accompanying drawing explanation
Fig. 1 illustrates the schematic diagram of the source electrode driver of the relevant example of the present invention one.
Fig. 2 illustrates the schematic diagram of the source electrode driver of one embodiment of the invention.
Fig. 3, Fig. 4 and Fig. 5 illustrate the schematic diagram of the source electrode driver of other embodiment of the present invention respectively.
[label declaration]
10: time schedule controller 100,200,300,400,500: source electrode driver
110,410,510: data converting circuit
120,220,320,420a, 420b, 520a, 520b: drive passage
122,222,322,422a, 422b, 522a, 522b: the first latch unit circuit
124,224,324,424a, 424b, 524a, 524b: the second latch unit circuit
130,230,330,430,530: data transmission interface
210,310: data processing circuit 212,312: data converting circuit
214,314: data copy circuit RX: acceptor circuit
Di1: the picture data Di2 of serial form: the picture data of parallel form
Di3: the picture data after copying
Embodiment
Fig. 1 illustrates the schematic diagram of the source electrode driver of the relevant example of the present invention one.Please refer to Fig. 1, the source electrode driver 100 of this relevant example, in order to receive the picture data Di1 provided by time schedule controller 10, shows corresponding image frame to drive display panel (not illustrating) accordingly.Specifically, in this instance, first source electrode driver 100 utilizes acceptor circuit RX to receive the picture data Di1 with serial (serial) form, then recycles the data Di2 that picture data Di1 is converted to parallel (parallel) form by data converting circuit 110.Afterwards, picture data Di2 is sequentially sent to via data transmission interface 130 in the latch unit circuit 122 driving passage 120 and stores by data converting circuit 110.When stored data volume reaches the quantity enough driven needed for row (line) pixel, stored picture data Di2 can be outputted to latch unit circuit 124 and store by latch unit circuit 122.Then, according to driver' s timing, latch unit circuit 124 can be in due course and stored picture data Di2 outputted to output buffer amplifier circuit (not illustrating), to do the action of charging and discharging to the liquid crystal capacitance of display panel.
Fig. 2 illustrates the schematic diagram of the source electrode driver of one embodiment of the invention.Please refer to Fig. 2, the source electrode driver 200 of the present embodiment comprises an acceptor circuit RX, data processing circuit 210, data transmission interface 230 and drives passage 220.In the present embodiment, source electrode driver 200 utilizes acceptor circuit RX to receive the picture data Di1 provided by time schedule controller 10, the corresponding display frame of this picture data Di1.Then, data processing circuit 210 receives picture data Di1, and in order to picture data Di1 is converted to parallel form by serial form.Meanwhile, data processing circuit 210 also can in order to copy picture data Di2, to produce the picture data Di3 after copying.Afterwards, the picture data Di3 after copying exports to via data transmission interface 230 and drives passage 220 by data processing circuit 210 again.Data transmission interface 230 is coupled in data processing circuit 210 and drives between passage 220, in order to the picture data Di3 after transmission copying.Data transmission interface 230 herein comprises data bus (data bus).Drive passage 220 to be coupled to data transmission interface 230, in order to receive the picture data Di3 after copying, and utilize the picture data Di3 after copying to drive display panel.
Specifically, least for the problem that reduction electromagnetic interference (EMI) and power consumption cause temperature to rise, when display panel is for the more dull picture of display, display frame now does not need very high resolution.Hereat, time schedule controller 10 can send the picture data Di1 of less data volume to source electrode driver 200.Afterwards, then by the data processing circuit 210 of source electrode driver 200 inside, the data received are copied, to meet the demand of the image frame driving display panel display corresponding.
For example, be configured with 960 drive in the enforcement aspect of passage at source electrode driver 200, under display frame does not need high-resolution situation, time schedule controller 10 only needs to provide the data volume of 480 drivings needed for passage to source electrode driver 200.Then, the data volume received is copied one times by source electrode driver 200 again, can drive display panel accordingly.Therefore, in the present embodiment, source electrode driver 200 need receive less data volume, enough picture data can be provided to drive display panel through the mode copied.Therefore, in the present embodiment, for same display frame, the data volume of the picture data Di3 that data transmission interface 230 transmits is greater than the data volume of the picture data Di1 that data processing circuit 210 receives.It should be noted, in this instance, the number of driving passage and the size of data volume are only in order to illustrate, and the present invention is not limited.
Specifically, please continue to refer to Fig. 2, the data processing circuit 210 of the present embodiment comprises data converting circuit 212 and a data copy circuit 214.Data converting circuit 212 in order to receive picture data Di1, and after picture data Di1 is converted to parallel form by serial form, exports data copy circuit 214 to.Data copy circuit 214 is coupled between data converting circuit 212 and data transmission interface 230, in order to receive the picture data Di2 of parallel form, and copies picture data Di2, to produce the picture data Di3 after copying.In simple terms, serial data, after receiving the data that time schedule controller 10 transmits, can be changed into parallel data by data converting circuit 212.After data change into parallel form, data copy circuit 214 carries out data Replica again.Then, the data after replication processes are sent to data transmission interface 230 by data copy circuit 214 again, and are sequentially stored in the first latch unit circuit 222 and the second latch unit circuit 224 driving passage 220.
In the present embodiment, data processing circuit 210 is copied after picture data Di1 is carried out format conversion again, but the present invention is not limited to this.In another embodiment, described data processing circuit also can be carry out format conversion again after first copying picture data.
Fig. 3 illustrates the schematic diagram of the source electrode driver of another embodiment of the present invention.Please refer to Fig. 2 and Fig. 3, the source electrode driver 300 of the present embodiment is similar to the source electrode driver 200 of Fig. 2, only Main Differences between the two is such as that data processing circuit 310 first copies picture data Di1, then carries out format conversion to the picture data Di3 after copying.
Specifically, in the present embodiment, data copy circuit 312, in order to receive and to copy picture data Di1, to produce the picture data Di3 after copying, and exports the picture data Di3 after copying to data converting circuit 314.Data converting circuit 314 is coupled between data copy circuit 312 and data transmission interface 330, in order to receive the picture data after copying, and the picture data Di3 after copying is converted to parallel form by serial form, to produce the picture data Di2 of parallel form.
In the above-described embodiments, data processing circuit is copied after first picture data being carried out format conversion again, or carries out format conversion again after first copying picture data, but the present invention is not limited to this.In another embodiment, data processing circuit also can be selected not copy picture data, and utilizes the mode of adjustment data bus, or change data reach with copying the identical effect of picture data at the storage location of driving passage.
Fig. 4 illustrates the schematic diagram of the source electrode driver of another embodiment of the present invention.Please refer to Fig. 4, the source electrode driver 400 of the present embodiment comprises data converting circuit 410, data transmission interface 430 and multiple driving passage 420a, 420b.Picture data Di1 in order to receive picture data Di1, and is converted to parallel form by serial form by data converting circuit 410, to produce the picture data Di2 of parallel form.Image frame shown on the corresponding display panel of described picture data.Data transmission interface 430 couples data converting circuit 410, in order to transmit picture data Di2.Drive passage 420a, 420b to be coupled to data transmission interface 430, in order to receive picture data Di2, and utilize picture data Di2 to drive display panel.In the present embodiment, after the picture data Di1 of serial form is converted into the picture data Di2 of parallel form, data converting circuit 410 can transmit picture data Di2 to driving passage 420a, 420b via data transmission interface 430 simultaneously.Therefore, for same display frame, in the driving passage of source electrode driver 400, adjacent two drive passage 420a, 420b to store identical picture data Di2.
Specifically, driving passage 420a, 420b of the present embodiment comprise first latch unit circuit 422a, 422b and second latch unit circuit 424a, 424b respectively.First latch unit circuit 422a, 422b is respectively in order to receive and stored picture data Di2.Because data converting circuit 410 can transmit identical picture data Di2 to driving passage 420a, 420b simultaneously, therefore for same display frame, adjacent two driving passages 420a, 420b of the present embodiment, its first latch unit circuit 422a, 422b receive and store identical picture data Di2.Then, second latch unit circuit 424a, 424b is coupled to first latch unit circuit 422a, 422b respectively, in order to receive and to store the picture data that first latch unit circuit 422a, 422b provide.Because first latch unit circuit 422a, 422b stores identical picture data Di2 respectively, therefore second latch unit circuit 424a, 424b also stores identical picture data Di2 respectively, can reach the operation of data Replica by this.
Fig. 5 illustrates the schematic diagram of the source electrode driver of another embodiment of the present invention.Please refer to Fig. 4 and Fig. 5, the source electrode driver 500 of the present embodiment is similar to the source electrode driver 400 of Fig. 4, and only Main Differences between the two is such as to drive in passage at adjacent two, and one of them first latch unit circuit receives and stored picture data.
Specifically, in the present embodiment, after the picture data Di1 of serial form is converted into the picture data Di2 of parallel form, data converting circuit 410 can transmit picture data Di2 to the first latch unit circuit 522a driving passage 520a via data transmission interface 530.Therefore, drive in passage 520a, 520b at adjacent two, one of them first latch unit circuit 522a receives and stored picture data Di2.Then, the first latch unit circuit 522a transmits picture data Di2 again to first latch unit circuit 524a, 524b simultaneously.Therefore, for same display frame, one of them first latch unit circuit 522a provides identical picture data Di2 to drive second latch unit circuit 524a, 524b of passage 520a, 520b to adjacent two respectively, therefore, adjacent two drive second latch unit circuit 524a, 524b of passage 520a, 520b receive respectively and store identical picture data Di2, can reach the operation of data Replica by this.
In sum, in exemplary embodiment of the present invention, source electrode driver utilizes the mode copying picture data to reduce the operating speed of himself, thus reduces power consumption, and reduces the problem of temperature and electromagnetic interference (EMI).In addition, source electrode driver also can be selected not copy picture data, and utilizes the mode of adjustment data bus, or change data reach with copying the identical effect of picture data at the storage location of driving passage.
Although the present invention discloses as above with embodiment; so itself and be not used to limit the present invention; have in any art and usually know the knowledgeable; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the appended right person of defining.
Claims (6)
1. a source electrode driver, for driving display panel, this source electrode driver comprises:
Data processing circuit, in order to receive picture data, and is converted to parallel form by this picture data by serial form, and copies this picture data, the wherein corresponding display frame of this picture data;
Data transmission interface, is coupled to this data processing circuit, in order to this picture data after transmission copying; And
Drive passage, be coupled to this data transmission interface, in order to receive this picture data after copying, and utilize this picture data after copying to drive this display panel,
Wherein for same display frame, the data volume of this picture data that this data transmission interface transmits is greater than the data volume of this picture data that this data processing circuit receives.
2. source electrode driver according to claim 1, wherein this data processing circuit comprises:
Data converting circuit, in order to receive this picture data, and is converted to parallel form by this picture data by serial form; And
Data copy circuit, is coupled to this data converting circuit, in order to receive this picture data of parallel form, and copies this picture data of parallel form.
3. source electrode driver according to claim 1, wherein this data processing circuit comprises:
Data copy circuit, in order to receive this picture data, and copies this picture data; And
Data converting circuit, is coupled to this data copy circuit, in order to receive this picture data after copying, and this picture data after copying is converted to parallel form by serial form.
4. a source electrode driver, for driving display panel, this source electrode driver comprises:
Data converting circuit, in order to receive picture data, and is converted to parallel form by this picture data by serial form, the wherein corresponding display frame of this picture data;
Data transmission interface, is coupled to this data converting circuit, in order to transmit this picture data; And
Multiple driving passage, is coupled to this data transmission interface, in order to receive this picture data, and utilizes this picture data to drive this display panel,
Wherein for same display frame, two adjacent in the plurality of driving passage drive passage to store this identical picture data.
5. source electrode driver according to claim 4, wherein respectively this driving passage comprises:
First latch unit circuit, in order to receive and to store this picture data; And
Second latch unit circuit, is coupled to this first latch unit circuit, in order to receive and to store this picture data that this first latch unit circuit provides,
Wherein for this same display frame, those the first latch unit circuit of adjacent two the plurality of driving passages receive and store this identical picture data.
6. source electrode driver according to claim 4, wherein respectively this driving passage comprises:
First latch unit circuit, in order to receive and to store this picture data; And
Second latch unit circuit, is coupled to this first latch unit circuit, in order to receive and to store this picture data that this first latch unit circuit provides,
Wherein in adjacent two the plurality of driving passages, the described first latch unit circuit of one of them receives and stores this picture data, and for this same display frame, this one of them described first latch unit circuit provides this picture data to those the second latch unit circuit of two adjacent the plurality of driving passages, and those the second latch unit circuit of adjacent two the plurality of driving passages receive and store this identical picture data.
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| CN201310256141.5A CN104252850A (en) | 2013-06-25 | 2013-06-25 | Source electrode driver |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310256141.5A CN104252850A (en) | 2013-06-25 | 2013-06-25 | Source electrode driver |
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| CN202058415U (en) * | 2010-12-29 | 2011-11-30 | 广东中显科技有限公司 | Driving circuit for monochromatic silicon substrate OLED display |
| CN102915709A (en) * | 2012-08-31 | 2013-02-06 | 友达光电股份有限公司 | Electrophoretic display system |
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2013
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Patent Citations (7)
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| US6356260B1 (en) * | 1998-04-10 | 2002-03-12 | National Semiconductor Corporation | Method for reducing power and electromagnetic interference in conveying video data |
| CN1460982A (en) * | 2002-05-17 | 2003-12-10 | 夏普公司 | Signal output device and display device |
| CN1501706A (en) * | 2002-11-12 | 2004-06-02 | 夏普株式会社 | Data signal wire driving method, data signal wire driving circuit and display device |
| US20070222737A1 (en) * | 2005-12-02 | 2007-09-27 | Semiconductor Energy Laboratory Co., Ltd. | Display device |
| CN101345016A (en) * | 2007-07-09 | 2009-01-14 | 恩益禧电子股份有限公司 | Flat panel display device and data processing method for video data |
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Application publication date: 20141231 |