CN101345037A - Driving device and LCD using the same - Google Patents
Driving device and LCD using the same Download PDFInfo
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- CN101345037A CN101345037A CNA200810146693XA CN200810146693A CN101345037A CN 101345037 A CN101345037 A CN 101345037A CN A200810146693X A CNA200810146693X A CN A200810146693XA CN 200810146693 A CN200810146693 A CN 200810146693A CN 101345037 A CN101345037 A CN 101345037A
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- reference voltage
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Abstract
The invention discloses a driving device and an LED which uses the driving device; the driving device comprises a plurality of data driving chips and a control board. A plurality of the data driving chips receive frequency signals, a plurality of data signals and a first reference voltage from the first data driving chip in the form of serial connection and transmit the signals and the voltage to the last data driving chip. The control board is used for providing the frequency signals, a plurality of the data signals and the first reference voltage. The control board can change the first reference voltage received by each data driving chip according to the transmission change of the frequency signals and a plurality of the data signals among a plurality of the data driving chips so as to lead the operation frequency of a plurality of the data driving chips not to be limited.
Description
Technical field
The invention relates to a kind of plane display technique, and particularly relevant for a kind of drive unit and utilize the LCD of this drive unit.
Background technology
Along with making rapid progress of science and technology,, accelerate to such an extent as to the operating frequency of the data driving chip of LCD (data driver ICs) is also necessary because the resolution of LCD (LCD) little by little increases.Generally speaking, in order to want to accelerate the operating frequency of data driving chip, tradition can connect a plurality of data driving chip with series system, and the end of a thread series terminal logic (the stubseries terminated logic that needs reference voltage in the collocation running, hereinafter to be referred as SSTL) interface, be used for transmitting frequency signal (clock signal) and the data-signal (data signals) that time schedule controller (timingcontroller) is provided.Yet, because the reference voltage that offers each data driving chip is all identical, and the decay that is produced in the process that frequency signal and data-signal transmit between each data driving chip can cause and reference voltage between difference change and suppress the operating frequency of each data driving chip.
Summary of the invention
The invention provides a kind of drive unit and utilize the LCD of this drive unit, so as to making the operating frequency of data driving chip unrestricted.
The invention provides a kind of drive unit of LCD, comprise a plurality of data driving chip and control panel.Described a plurality of data driving chip is to receive and transmit frequency signal, a plurality of data-signal and first reference voltage to last data driving chip with series system from first data driving chip.Described control panel is in order to provide described frequency signal, described a plurality of data-signals and described first reference voltage.The variation that described control panel meeting is transmitted between described a plurality of data driving chip according to described frequency signal and described a plurality of data-signal, and change described first reference voltage that each data driving chip receives, unrestricted so as to the operating frequency that causes described a plurality of data driving chip.
The present invention provides a kind of drive unit of LCD in addition, comprises a plurality of data driving chip and control panel.Described a plurality of data driving chip receives and transmits frequency signal, a plurality of data-signal, first reference voltage and second reference voltage to last data driving chip with series system from first data driving chip.Described control panel is in order to provide described frequency signal, described a plurality of data-signals, described first reference voltage and described second reference voltage.The variation that described control panel meeting is transmitted between described a plurality of data driving chip according to described frequency signal and described a plurality of data-signal, and determine each data driving chip for receiving described first or second reference voltage, unrestricted so as to the operating frequency that causes described a plurality of data driving chip.
The present invention provides a kind of LCD of utilizing above-mentioned drive unit in addition.
Drive unit proposed by the invention and the LCD of utilizing this drive unit detect the variation that frequency signal and data-signal transmit by control panel the reference voltage that provides to each data driving chip are provided between each data driving chip.Thus, each data driving chip just can receive suitable reference voltage, just can not be subjected to the decay of frequency signal and data-signal and is limited so as to the operating frequency that causes each data driving chip.
For above and other objects of the present invention, feature and advantage can be become apparent, the several embodiment of the present invention cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the calcspar of an embodiment of LCD driving mechanism of the present invention;
Fig. 2 is first reference voltage Vref, 1 synoptic diagram that data driving chip 101_1 ~ 101_n received of one embodiment of the invention;
Fig. 3 is the calcspar of another embodiment of LCD driving mechanism of the present invention;
Fig. 4 is first and second reference voltage Vref 1, the Vref2 synoptic diagram that data driving chip 301_1 ~ 301_n received of another embodiment of the present invention.
Reference numeral wherein:
100,300: the drive unit of LCD
101_1 ~ 101_n, 301_1 ~ 301_n: data driving chip
103: control panel 105,303: time schedule controller
107,305: reference voltage generator 109,309: detection/control module
307_1 ~ 307_n: selected cell CLK: frequency signal
D0 ~ Dn: a plurality of data-signal Vref1: first reference voltage
Vref2: the second reference voltage GND: earthing potential
R1 ~ Rn, R11 ~ R1n, R21 ~ R2n: the internal resistance of data driving chip
H, H1, H2: head end T, the T1 in loop, T2: the end in loop
C11 ~ c1n:c21 ~ c2n: select signal s11 ~ s1n, s21 ~ s2n: switch
Embodiment
The technology effect that the present invention desires to reach is in order to allow the operating frequency of each data driving chip of LCD can not be subjected to the decay of frequency signal and data-signal and to be limited.
Fig. 1 is the calcspar of an embodiment of LCD driving mechanism of the present invention.LCD driving mechanism 100 comprises a plurality of data driving chip 101_1 ~ 101_n and control panel (control board) 103.Data driving chip 101_1 ~ 101_n receives and transmits frequency signal CLK, a plurality of data-signal D0 ~ Dn and first reference voltage Vref 1 to last data driving chip 101_n in series connection (cascade) mode from first data driving chip 101_1; 103 of control panels are in order to provide frequency signal CLK, data-signal D0 ~ Dn and first reference voltage Vref 1.
Those skilled in the art in the invention know when knowing, data driving chip 101_1 ~ 101_n is the SSTL interface that needs reference voltage in the collocation running, uses and transmits frequency signal CLK and the data-signal D0 ~ Dn that control panel 103 is provided.In addition, the data driving chip 101_1 of present embodiment ~ 101_n can directly be produced on the glass substrate (glasssubstrate) of display panels (LCD pane1, not shown in the figures).
In present embodiment, the variation that control panel 103 meetings are transmitted between data driving chip 101_1 ~ 101_n according to frequency signal CLK and data-signal D0 ~ Dn, and change first reference voltage Vref 1 that each data driving chip 101_1 ~ 101_n is received, so that the operating frequency of data driving chip 101_1 ~ 101_n is unrestricted.
Definite, control panel 103 comprises time schedule controller 105, reference voltage generator 107, and detection/control module 109.Time schedule controller 105 is in order to produce frequency signal CLK and data-signal D0 ~ Dn; Reference voltage generator 107 is in order to providing first reference voltage head end H in order to the loop of transmitting first reference voltage Vref 1 to data driving chip 101_1 ~ 101_n, and second reference voltage Vref 2 terminal T in order to the loop of transmitting first reference voltage Vref 1 to data driving chip 101_1 ~ 101_n is provided; Detection/control module 109 is in order to detect the variation that frequency signal CLK and data-signal D0 ~ Dn transmit between data driving chip 101_1 ~ 101_n, and control reference voltage generator 107 according to this, to adjust first reference voltage Vref 1 that each data driving chip 101_1 ~ 101_n is received.
In present embodiment, detection/control module 109 detects frequency signal CLK and data-signal D0 ~ Dn can be the attenuation state that detection frequency signal CLK and data-signal D0 ~ Dn transmit between data driving chip 101_1 ~ 101_n in the variation of transmitting between data driving chip 101_1 ~ 101_n, but is not restricted to this.
In addition, because internal resistance R1 ~ Rn of each data driving chip 101_1 ~ 101_n is in fact all identical.Therefore, detection/control module 109 two reference voltage Vref 1 or the Vref2 that can come adaptive control reference voltage generator 107 to be provided in the attenuation state of each data driving chip 101_1 ~ 101_n according to frequency signal CLK and data-signal D0 ~ Dn.Thus, first reference voltage Vref 1 that reference voltage generator 107 is provided will have identical attenuation state (as shown in Figure 2) in each data driving chip 101_1 ~ 101_n with frequency signal CLK and data-signal D0 ~ Dn, to such an extent as to each data driving chip 101_1 ~ 101_n can be in response to receiving the first suitable reference voltage Vref 1.
The variation (that is attenuation state) that detection/control module 109 meeting detection frequency signal CLK and data-signal D0 ~ Dn transmit between each data driving chip 101_1 ~ 101_n, therefore can adjust second reference voltage Vref 2 that reference voltage generator 107 is provided, and then change first reference voltage Vref 1 that each data driving chip 101_1 ~ 101_n is received.Thus, each data driving chip 101_1 ~ 101_n just can receive the first suitable reference voltage Vref 1, so that the operating frequency of each data driving chip 101_1 ~ 101_n can not be subjected to the decay of frequency signal CLK and data-signal D0 ~ Dn and be limited.
Fig. 3 is the calcspar of another embodiment of LCD driving mechanism of the present invention.As shown in Figure 3, LCD driving mechanism 300 comprises a plurality of data driving chip 301_1 ~ 301_n and the control panel that is made of time schedule controller 303, reference voltage generator 305, a plurality of selected cell 307_1 ~ 307_n and detection/control module 309.
Data driving chip 301_1 ~ 301_n receives and transmits frequency signal CLK, data-signal D0 ~ Dn, first reference voltage Vref 1 and second reference voltage Vref 2 to last data driving chip 301_n with series system from first data driving chip 301_1; Control panel is then in order to provide frequency signal CLK, data-signal D0 ~ Dn, first reference voltage Vref 1 and second reference voltage Vref 2.
Those skilled in the art in the invention know when knowing, need the SSTL interface of reference voltage in data driving chip 301_1 ~ 301_n system collocation running, use and transmit frequency signal CLK and the data-signal D0 ~ Dn that control panel provided.In addition, the data driving chip 301_1 of present embodiment ~ 301_n can directly be produced on the glass substrate of display panels.
In present embodiment, the variation that control panel can transmit between data driving chip 301_1 ~ 301_n according to frequency signal CLK and data-signal D0 ~ Dn, and determine each data driving chip 301_1 ~ 301_n for receiving first reference voltage Vref 1 or second reference voltage Vref 2 (magnitude of voltage of these two reference voltage Vref 1, Vref2 can decide according to the actual design demand), so that the operating frequency of data driving chip 301_1 ~ 301_n is unrestricted.
From the above, control panel is by time schedule controller 303, reference voltage generator 305, a plurality of selected cell 307_1 ~ 307_n, and detection/control module 309 constitutes.Time schedule controller 303 is in order to produce frequency signal CLK and data-signal D0 ~ Dn; Reference voltage generator 305 is in order to distinctly providing first reference voltage Vref 1 and second reference voltage Vref 2 head end H1, the H2 in order to the loop of transmitting first and second reference voltage Vref 1, Vref2 to data driving chip 301_1 ~ 301_n, and terminal T1, the T2 in order to the loop of transmitting first and second reference voltage Vref 1, Vref2 is all open circuit (open) among data driving chip 301_1 ~ 301_n.
Thus, be all first reference voltage Vref 1 in order to the arbitrary position on the loop of transmitting first reference voltage Vref 1 among data driving chip 301_1 ~ 301_n, and be all second reference voltage Vref 2 in order to the arbitrary position on the loop of transmitting second reference voltage Vref 2 among data driving chip 301_1 ~ 301_n.In addition, in data driving chip 301_1 ~ 301_n, be the internal resistance of data driving chip 301_1 ~ 301_n in order to resistance R 11 ~ R1n, R21 ~ R2n on the loop of transmitting first and second reference voltage Vref 1, Vref2.
Selected cell 307_1 ~ 307_n corresponding data chip for driving out of the ordinary 301_1 ~ 301_n.Each selected cell 307_1 ~ 307_n is according to selecting signal c11/c12/ ... / c1n, c21/c22/ ... / c2n serves as to receive first or second reference voltage Vref 1, Vref2 with determination data chip for driving 301_1 ~ 301_n.In present embodiment, each selected cell 307_1 ~ 307_n is all by two switch s11/s12/ ... / s1n, s21/s22/ ... / s2n forms, and it is interior or outer to dispose/be produced on data driving chip 301_1 ~ 301_n, and switch s11 is controlled by selection signal c11; Switch s12 is controlled by selection signal c12; The rest may be inferred to switch s1n is controlled by and selects signal c1n.Similarly, switch s21 is controlled by selection signal c21; Switch s22 is controlled by selection signal c22; The rest may be inferred to switch s2n is controlled by and selects signal c2n.
Detection/control module 309 is in order to detect the variation that frequency signal CLK and data-signal D0 ~ Dn transmit between data driving chip 301_1 ~ 301_n, and signal c11/c12/ is selected in output according to this ... / c1n, c21/c22/ ... / c2n distinctly controls selected cell 307_1 ~ 307_n, uses each data driving chip 301_1 ~ 301_n of decision for receiving first or second reference voltage Vref 1, Vref2.
In present embodiment, detection/control module 309 detects frequency signal CLK and data-signal D0 ~ Dn can be the attenuation state that detection frequency signal CLK and data-signal D0 ~ Dn transmit between data driving chip 301_1 ~ 301_n in the variation of transmitting between data driving chip 301_1 ~ 301_n, but is not restricted to this.When detection/control module 309 detects frequency signal CLK and data-signal D0 ~ Dn when the attenuation state that transmits between i and (i+1) individual data chip for driving is close in fact, detection/control module 309 can cause identical first or second reference voltage Vref 1, the Vref2 of the individual data chip for driving reception of i and (i+1), and wherein i is a positive integer.
For instance, when detection/control module 309 detects frequency signal CLK and data-signal D0 ~ Dn when the attenuation state that transmits between first and second data chip for driving 301_1,301_2 is close in fact, detection/control module 309 can be exported and select signal c11, c12, c21, c22 serves as conducting simultaneously with control example out of the ordinary such as switch s11, s12, and switch s21, s22 are for closing simultaneously.Thus, first promptly can receive the first identical reference voltage Vref 1 (as shown in Figure 4) with second data chip for driving 301_1,301_2.
In addition, when detection/control module 309 detects frequency signal CLK and data-signal D0 ~ Dn when the attenuation state difference of transmitting between second and the 3rd data chip for driving 301_1,301_2 is excessive, detection/control module 309 can be exported and select signal c12, c13, c22, c23 serves as conducting simultaneously with gauge tap s12 out of the ordinary, s23, and switch s13, s22 are for ending simultaneously.Thus, second with the 3rd data chip for driving 301_2,301_3 promptly can distinctly receive first and second reference voltage Vref 1, Vref2 (as shown in Figure 4).
Moreover, when detection/control module 309 detects frequency signal CLK and data-signal D0 ~ Dn when the attenuation state that transmits between the 3rd and the 4th data chip for driving 301_1,301_2 is close in fact, detection/control module 309 can be exported and select signal c13, c14, c23, c24 serves as conducting simultaneously with control example out of the ordinary such as switch s13, s14, and switch s23, s24 are for closing simultaneously.Thus, the 3rd promptly can receive the second identical reference voltage Vref 2 (as shown in Figure 4) with the 4th data chip for driving 301_3,301_4.
In present embodiment, in fact whether close can the definition voluntarily of attenuation state of transmitting between i and (i+1) individual data chip for driving by the user.That is to say that the user can decide attenuation state to fall within according to the actual design demand promptly to can be considered close in which scope, promptly can be considered variant outward and exceed which scope.
In view of the above, because detections/control module 309 is understood according to frequency signal CLK and data-signal D0 ~ Dn in the variation (that is attenuation state) of each data driving chip 301_1 ~ 301_n, come each data driving chip 301_1 ~ 301_n of adaptive decision for receiving first or second reference voltage Vref 1, Vref2, to such an extent as to each data driving chip 301_1 ~ 301_n still can be in response to receiving suitable first or second reference voltage Vref 1, Vref.Thus, the operating frequency of each data driving chip 301_1 ~ 301_n can not be subjected to the decay of frequency signal CLK and data-signal D0 ~ Dn equally and be limited.
In sum, the main meeting of the drive unit of LCD proposed by the invention changes the reference voltage that provides to each data driving chip by the variation that control panel detection frequency signal and data-signal transmit between each data driving chip.Thus, each data driving chip just can receive suitable reference voltage, so that the operating frequency of each data driving chip can not be subjected to the decay of frequency signal and data-signal and be limited.
In addition, so long as the drive unit that uses above-mentioned arbitrary LCD proposed by the invention, just belongs to the category of institute of the present invention desire protection in LCD wherein.Moreover; though the present invention with a plurality of embodiment openly as above; but it is not in order to limit the present invention; any technician with the technical field of the invention; without departing from the spirit and scope of the present invention; when can doing a little change and modification, so protection scope of the present invention is as the criterion when looking the accompanying Claim book person of defining.
Claims (11)
1. the drive unit of a LCD is characterized in that, comprising:
A plurality of data driving chip receive and transmit a frequency signal, a plurality of data-signal and one first reference voltage to last data driving chip from first data driving chip with series system; And
One control panel, in order to this frequency signal, those data-signals and this first reference voltage to be provided, wherein this control panel one variation of between those data driving chip, transmitting according to this frequency signal and those data-signals, and change this first reference voltage that each data driving chip receives, so that the operating frequency of those data driving chip is unrestricted.
2. the drive unit of LCD as claimed in claim 1 is characterized in that, this control panel comprises:
Time schedule controller is in order to produce this frequency signal and those data-signals;
One reference voltage generator, in order to this first reference voltage head end in order to the loop of transmitting this first reference voltage to those data driving chip to be provided, and provide one second reference voltage to those data driving chip, in order to the end in the loop of transmitting this first reference voltage; And
One detection/control module in order to detecting this variation, and this second reference voltage of controlling this reference voltage generator according to this and being provided, is used and is changed this first reference voltage that each data driving chip received.
3. the drive unit of LCD as claimed in claim 2 is characterized in that, this variation comprises the attenuation state that this frequency signal and those data-signals transmit between those data driving chip.
4. LCD with drive unit of LCD as claimed in claim 1.
5. the drive unit of a LCD is characterized in that, comprising:
A plurality of data driving chip receive and transmit a frequency signal, a plurality of data-signal, one first reference electricity and one second reference voltage to last data driving chip with series system from first data driving chip; And
One control panel, in order to this frequency signal, those data-signals, this first reference voltage and this second reference voltage to be provided, wherein this control panel is a variation of transmitting between those data driving chip according to this frequency signal and those data-signals, and determine each data driving chip for receive this first or this second reference voltage so that the operating frequency of those data driving chip is unrestricted.
6. the drive unit of LCD as claimed in claim 5 is characterized in that, this control panel comprises:
Time schedule controller is in order to produce this frequency signal and those data-signals;
One reference voltage generator, in order to distinctly provide this first with this second reference voltage to those data driving chip in order to transmit this first with the head end in the loop of this second reference voltage, and first be all open circuit in order to transmit this in those data driving chip with the end in the loop of this second reference voltage;
A plurality of selected cells, those data driving chip out of the ordinary corresponding, each selected cell according to one select signal with determine those data driving chip serve as receive this first or this second reference voltage; And
One detection/control module in order to detecting this variation, and is exported those according to this and is selected signals distinctly control those selected cells, use each data driving chip of decision and be reception this first or this second reference voltage.
7. the drive unit of LCD as claimed in claim 6 is characterized in that, this variation comprises the attenuation state that this frequency signal and those data-signals transmit between those data driving chip.
8. the drive unit of LCD as claimed in claim 7, it is characterized in that, when this detection/control module detects this frequency signal and those data-signals when the attenuation state that transmits between i and (i+1) individual data chip for driving is close in fact, this detection/control module can cause identical this of the individual data chip for driving reception of i and (i+1) first or this second reference voltage, and wherein i is a positive integer.
9. the drive unit of LCD as claimed in claim 6 is characterized in that, those selected cells are configured in those data driving chip inside respectively.
10. the drive unit of LCD as claimed in claim 6 is characterized in that, those selected cells are configured in those data driving chip outsides respectively.
11. LCD with drive unit of LCD as claimed in claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810146693XA CN101345037B (en) | 2008-09-04 | 2008-09-04 | Driving device and LCD using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810146693XA CN101345037B (en) | 2008-09-04 | 2008-09-04 | Driving device and LCD using the same |
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| CN101345037A true CN101345037A (en) | 2009-01-14 |
| CN101345037B CN101345037B (en) | 2010-10-20 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798791A (en) * | 2011-05-26 | 2012-11-28 | 通用电气公司 | Systems and methods for determining electrical faults |
| CN102956206A (en) * | 2011-08-18 | 2013-03-06 | 联咏科技股份有限公司 | Integral source driver and driving method thereof |
| CN105976778A (en) * | 2016-07-04 | 2016-09-28 | 深圳市华星光电技术有限公司 | Data driving system of liquid crystal display panel |
| US9541604B2 (en) | 2013-04-29 | 2017-01-10 | Ge Intelligent Platforms, Inc. | Loop powered isolated contact input circuit and method for operating the same |
| CN109948173A (en) * | 2019-01-04 | 2019-06-28 | 上海亿算科技有限公司 | A kind of chip system |
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2008
- 2008-09-04 CN CN200810146693XA patent/CN101345037B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798791A (en) * | 2011-05-26 | 2012-11-28 | 通用电气公司 | Systems and methods for determining electrical faults |
| CN102798791B (en) * | 2011-05-26 | 2018-01-09 | 通用电气公司 | System and method for determining electric fault |
| CN102956206A (en) * | 2011-08-18 | 2013-03-06 | 联咏科技股份有限公司 | Integral source driver and driving method thereof |
| US9541604B2 (en) | 2013-04-29 | 2017-01-10 | Ge Intelligent Platforms, Inc. | Loop powered isolated contact input circuit and method for operating the same |
| CN105976778A (en) * | 2016-07-04 | 2016-09-28 | 深圳市华星光电技术有限公司 | Data driving system of liquid crystal display panel |
| CN105976778B (en) * | 2016-07-04 | 2019-01-11 | 深圳市华星光电技术有限公司 | The data-driven system of liquid crystal display panel |
| US10417986B2 (en) | 2016-07-04 | 2019-09-17 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Data driving system of liquid crystal display panel |
| CN109948173A (en) * | 2019-01-04 | 2019-06-28 | 上海亿算科技有限公司 | A kind of chip system |
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| Publication number | Publication date |
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| CN101345037B (en) | 2010-10-20 |
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