CN101145782A - D/A conversion unit, source pole driving circuit and display device drive method - Google Patents
D/A conversion unit, source pole driving circuit and display device drive method Download PDFInfo
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- CN101145782A CN101145782A CNA2006101537902A CN200610153790A CN101145782A CN 101145782 A CN101145782 A CN 101145782A CN A2006101537902 A CNA2006101537902 A CN A2006101537902A CN 200610153790 A CN200610153790 A CN 200610153790A CN 101145782 A CN101145782 A CN 101145782A
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- negative polarity
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Abstract
The invention discloses a digital-analog conversion unit and a source electrode driver circuit using the digital-analog conversion unit, and a driving method of a display device. The digital-analog conversion unit comprises a resistor cluster with positive polarity and a resistor cluster with negative polarity, wherein the resistance of each resistor in the resistor cluster with positive polarity is calculated by a driving voltage with positive polarity, and the resistance of each resistor in the resistor cluster with negative polarity is calculated by a driving voltage with negative polarity, so that the driving voltages with positive and negative polarities have better symmetrical characteristic.
Description
Technical field
The present invention uses its source electrode drive circuit relevant for a kind of D/A conversion unit, and a kind of driving method of display unit.The present invention is particularly to a kind of source electrode drive circuit that makes the positive-negative polarity driving voltage have the D/A conversion unit of preferred symmetrical and use it, and a kind of display-apparatus driving method that utilizes the preferable positive-negative polarity driving voltage of symmetry to drive.
Background technology
In recent years, because the arriving of information age, people increase day by day for the demand of information equipment, and display is played the part of considerable role.Display is divided into numerous species according to its video picture principle, such as, LCD (liquidcrystal display, LCD), plasma display (plasma display panel, PDP), organic light emitting display (organic light emitting display, OLED) and field emission displays (fieldemission display, FED) etc.Have that high image quality, space utilization efficient are good, the LCD of low consumpting power, advantageous characteristic such as radiationless become the main flow of present monitor market.
In general, LCD is to come show image by applying driving voltage in liquid crystal molecule (or being called pixel).Yet the relation of driving voltage and liquid crystal molecule penetrance is not linear, but presents-relation of Gamma curve.Proofread and correct so need carry out Gamma, make the pixel data (or being called the GTG signal) on each rank and the light transmittance of liquid crystal molecule present linear relationship, make the picture of LCD reach better display quality.
The driving voltage of display is to be formed by the electric resistance partial pressure that is connected in series mostly at present.In display unit, the resistance string that is used to produce driving voltage is to be configured in digital-to-analogue conversion (digital-analog converter the abbreviates DAC as) circuit.This D/A conversion circuit is the part of source electrode drive circuit, and source electrode drive circuit is used to drive display floater.
Tradition is as follows in the mode of the resistance value of calculating source electrode drive circuit internal resistance string.The liquid crystal voltage value that obtains each rank by the V-TCurve and the Gamma curve of liquid crystal molecule.And utilize approximation methods such as extrapolation/interpolation method to obtain the positive polarity driving voltage and the negative polarity driving voltage on each rank with reference voltage.Then, utilize the voltage difference of the voltage difference of the pairing positive polarity driving voltage in adjacent two rank or negative polarity driving voltage to try to achieve the resistance value of each pairing internal resistance in rank.
In general, the negative polarity resistance string that positive polarity resistance string of being tried to achieve by positive polarity voltage and reverse voltage are tried to achieve can be different, and as not considering this factor, the symmetry of resulting positive-negative polarity driving voltage is bad with causing.
If the resistance value of the positive polarity resistance string that will be tried to achieve by the positive polarity driving voltage is directly as the resistance value of negative polarity resistance string, utilize dividing potential drop to produce each rank negative polarity driving voltage again, then the negative polarity driving voltage of gained and target voltage values can be variant, shown in Figure 1A.The abscissa of Figure 1A is represented the GTG signal, and ordinate is represented magnitude of voltage.
Same, the resistance value of directly treating as the positive polarity resistance string as if the resistance value of the negative polarity resistance string of being tried to achieve by the negative polarity driving voltage, utilize dividing potential drop to produce each rank positive polarity voltage again, then the positive polarity driving voltage of gained and target voltage values also can be variant, shown in Figure 1B.The abscissa of Figure 1B is represented the GTG signal, and ordinate is represented magnitude of voltage.So will cause the asymmetric of positive-negative polarity voltage.
Therefore on conventional art, can provide several groups of external control voltages more in addition, can make the positive-negative polarity driving voltage that symmetry is preferably arranged.But except external control voltage fully the symmetry, the driving voltage on remaining each rank still has asymmetric problem to exist.
Summary of the invention
One of the object of the invention provides a kind of D/A conversion unit and uses its source electrode drive circuit, can make the positive-negative polarity driving voltage have preferred symmetrical, and the Gamma curve is improved.
Another purpose of the present invention provides a kind of driving method of display unit, and it utilizes the preferable positive-negative polarity driving voltage of symmetry to drive.
The invention provides a kind of D/A conversion unit and the source electrode drive circuit of using it.This D/A conversion unit comprises a positive polarity resistance string and a negative polarity resistance string.The resistance value of positive polarity resistance string is calculated by the positive polarity driving voltage, and the resistance value of negative polarity resistance string is calculated by the negative polarity driving voltage simultaneously.So, can make the positive-negative polarity driving voltage reach desired value and make that the positive-negative polarity driving voltage is symmetrical, to improve the Gamma curve of LCD.
The present invention proposes a kind of D/A conversion unit, receive at least two positive polarity reference voltages and two negative polarity reference voltages, estimate out each stage positive polarity driving voltage according to two positive polarity reference voltages again, estimate out each stage negative polarity driving voltage according to two negative polarity reference voltages, this D/A conversion unit also comprises-a positive polarity resistance string and a negative polarity resistance string, the positive polarity resistance string have series connection first to (N-1) positive polarity resistance, the resistance value of i positive polarity resistance is relevant to the voltage difference between i positive polarity driving voltage and (i+1) positive polarity driving voltage, and i is a positive integer.The negative polarity resistance string have series connection first to (N-1) negative polarity resistance, the resistance value of i negative polarity resistance is relevant to the voltage difference between i negative polarity driving voltage and (i+1) negative polarity driving voltage, and wherein the resistance value of i positive polarity resistance is different from the resistance value of i negative polarity resistance.
According to the described D/A conversion unit of preferred embodiment of the present invention, equal the first positive polarity reference voltage at the above-mentioned first positive polarity driving voltage, and N positive polarity driving voltage is when equaling the second positive polarity reference voltage, and the resistance value of i positive polarity resistance can be expressed as follows:
R
i+＝(V
i+-V
(i+1)+)/I
+
According to the described D/A conversion unit of preferred embodiment of the present invention, equal this first negative polarity reference voltage at the above-mentioned first negative polarity driving voltage, and N negative polarity driving voltage is when equaling the second negative polarity reference voltage, and the resistance value of i negative polarity resistance can be expressed as follows:
R
i-＝(V
i--V
(i+1)-)/I
-
From another viewpoint, the invention provides a kind of source electrode drive circuit, be used to drive display unit, this source electrode drive circuit comprises: GTG signal receiving unit, D/A conversion unit and output unit.The GTG signal receiving unit is used to receive the GTG signal; D/A conversion unit, an output signal that receives the GTG signal receiving unit with convert to first to one of N positive polarity driving voltage with first to one of N negative polarity driving voltage, N is a positive integer, D/A conversion unit according to first and second positive polarity reference voltage to estimate out first to N positive polarity driving voltage, according to first and second negative polarity reference voltage to estimate out first to N negative polarity driving voltage, D/A conversion unit have series connection first to (N-1) positive polarity resistance with connect first to (N-1) negative polarity resistance, the resistance value of i positive polarity resistance is different from the resistance value of i negative polarity resistance.
According to the described D/A conversion unit of preferred embodiment of the present invention, equal this first positive polarity reference voltage at the above-mentioned first positive polarity driving voltage, and this N positive polarity driving voltage is when equaling this second positive polarity reference voltage, and the resistance value of this i positive polarity resistance can be expressed as follows:
R
i+＝(V
i+-V
(i+1)+)/I
+
According to the described D/A conversion unit of preferred embodiment of the present invention, equal the first negative polarity reference voltage at the above-mentioned first negative polarity driving voltage, and N negative polarity driving voltage is when equaling the second negative polarity reference voltage, and the resistance value of i negative polarity resistance can be expressed as follows:
R
i-＝(V
i--V
(i+1)-)/I
-
From another viewpoint, the invention provides a kind of method of driving one display unit, comprising: receive the GTG signal; According to first and second positive polarity reference voltage to estimate out first to N positive polarity driving voltage; According to first and second negative polarity reference voltage to estimate out first to N negative polarity driving voltage; Utilize first the resistance value to (N-1) individual positive polarity resistance of this first to N positive polarity driving voltage of being estimated out to obtain connecting, N is a positive integer, this i positive polarity resistance is across between this i positive polarity driving voltage and this (i+1) positive polarity driving voltage, and i is a positive integer; Utilize first the resistance value to (N-1) negative polarity resistance of this first to N negative polarity driving voltage of being estimated out to obtain connecting, this i negative polarity resistance is across between this i negative polarity driving voltage and this (i+1) negative polarity driving voltage, and the resistance value of this i positive polarity resistance is different from the resistance value of this i negative polarity resistance; And with pressure drop in one of ohmically this i of i positive polarity or this (i+1) positive polarity driving voltage and pressure drop in ohmically this i of i negative polarity or this (i+1) negative polarity driving voltage as driving voltage, to drive display unit.
The invention provides a kind of D/A conversion unit and use its source electrode drive circuit, can make the both positive and negative polarity driving voltage have preferable symmetry by different positive-negative polarity resistance string, and then the Gamma curve is improved.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. is described in detail below.
Description of drawings
Figure 1A, 1B are the target positive-negative polarity driving voltage of prior art and the graph of a relation of actual positive-negative polarity driving voltage.
Fig. 2 is a standard Gamma curve chart.
Fig. 3 is the graph of a relation of striding voltage and LCD penetration between liquid crystal panel.
Fig. 4 is the circuit diagram of a sub-pixel.
Fig. 5 is the mode chart of grid voltage and node N1 voltage in the sub-pixel.
Fig. 6 is the schematic diagram of the positive-negative polarity resistance string of the embodiment of the invention.
Fig. 7 is the schematic diagram of the source electrode drive circuit of the embodiment of the invention.
Embodiment
Advantage of the present invention makes the positive-negative polarity driving voltage have preferable symmetry for using different positive-negative polarity resistance string (R-String).The resistance value of positive polarity resistance string is calculated by each rank positive polarity driving voltage, and the resistance value of negative polarity resistance string is calculated by each rank negative polarity driving voltage simultaneously.
At first need set up the Gamma curve (as shown in Figure 2) of a standard.The ordinate of Fig. 2 is a LCD penetration, and abscissa is the GTG signal.Liquid crystal molecule penetrance and GTG signal are not linear relationship as shown in Figure 2.Then see also Fig. 3.Fig. 3 ordinate is the liquid crystal molecule penetrance, and abscissa then is the voltage of striding between liquid crystal panel.Can try to achieve the liquid crystal voltage on each rank from Fig. 2 and Fig. 3.For instance, please refer to Fig. 2, when the stage is 30 (also being that the GTG signal is 30), corresponding ordinate (LCD penetration) is 0.2, and to shining Fig. 3 as can be known, ordinate (LCD penetration) is 0.2 o'clock, corresponding abscissa value is 2.5, and therefore drawing the liquid crystal voltage value in the 30th stage is 2.5V.
Please refer to Fig. 4, Fig. 4 is the circuit diagram of a sub-pixel, and a basic display unit (also being pixel) needs three sub-pixels to constitute, and three sub-pixels show the RGB three primary colors respectively.As shown in Figure 4, a sub-pixel has comprised a thin-film transistor TFT, a storage capacitance Cs, a liquid crystal capacitance C at least
LCAn and parasitic capacitance Cgd.Please refer to Fig. 5, the grid voltage when it shows the 0th rank and the mode chart of node N1 voltage.Grid voltage V as transistor T FT
GDuring for high level, the transistor T FT in the sub-pixel is opened, and storage capacitance Cs will be charged to required voltage (as the first positive polarity driving voltage V this moment
1+).When the transistor T FT that will close in the sub-pixel (also is the grid voltage V of transistor T FT
GWhen reducing to low level) because storage capacitance Cs begins discharge with to parasitic capacitance Cgd charging, so the voltage on the node N1 will be from voltage V
1+Decline △ V
P1In like manner, when storage capacitance Cs being charged to the first negative polarity driving voltage V
1-After, the transistor T FT that closes in the sub-pixel (also is the grid voltage V of transistor T FT
GWhen reducing to low level) because storage capacitance Cs begins discharge with to parasitic capacitance Cgd charging, so the voltage on the node N1 will be from voltage V
1-Decline △ V
P1
Center voltage V
COM, the driving voltage V on each rank
I+/ V
I-, the liquid crystal voltage V on each rank
LCi, and the relation between the falling quantity of voltages ρ Vpi on each rank is as follows:
V
i+＝V
COM+V
Lci+ρVpi (1)
V
i-＝V
COM-V
LCi+ρVpi (2)
When the GTG signal was 6 bits, i was between 1 to 64.
Can draw by formula (1) and (2)
V
1+＝V
COM+V
LC1+ρVp
1 (3)
V
1-＝V
COM-V
LC1-ρVp
1 (4)
V
64+＝V
COM+V
LC64+ρVp
64 (5)
V
64-＝V
COM-V
LC64+ρVp
64 (6)
V
1+-V
64+＝V
LC1-V
LC64+(ρVp
1-ρVp
64) (7)
V
64--V
1-＝V
LC1-V
LC64-(ρVp
1-ρVp
64) (8)
By (7) and (8) V as can be known
1+-V
64+And be not equal to V
64--V
1-This is representing, if the resistance value of the positive polarity resistance string that will be tried to achieve by the positive polarity driving voltage is directly as the resistance value of negative polarity resistance string, utilize dividing potential drop to produce each rank negative polarity driving voltage again, then the negative polarity driving voltage of gained and desirable negative polarity driving voltage can be variant; Just the symmetry between positive polarity driving voltage and negative polarity driving voltage is not good.Same, if the resistance value of the negative polarity resistance string of being tried to achieve by the negative polarity driving voltage is directly as the resistance value of positive polarity resistance string, utilize dividing potential drop to produce each rank positive polarity voltage again, resulting positive polarity driving voltage and target voltage values also still can be variant.
Please refer to Fig. 6, this is for the GTG signal of 6 bits being the positive-negative polarity resistance string schematic diagram in the source electrode drive circuit of example.The positive-negative polarity driving voltage in each stage of positive polarity driving voltage V1+ to V64+ and negative polarity driving voltage V1-to V64-representative wherein, and I+ and I-are respectively the electric current of flow through positive resistance string and negative resistance string, V
GMA1With V
GMA2Be the positive polarity reference voltage of external control, V
GMA3With V
GMA4Negative polarity reference voltage for external control.To V
GMA1With V
GMA2For example carry out interpolation method to estimate out positive polarity driving voltage V1+ to V64+.Similarly, to V
GMA3With V
GMA4For example carry out interpolation method to estimate out negative polarity driving voltage V1+ to V64+.Suppose that the first positive polarity driving voltage V1+ equals positive polarity reference voltage V
GMA1And the 64th positive polarity driving voltage V64+ equals the second positive polarity reference voltage V
GMA2The time, can further obtain the resistance value R of positive polarity resistance string
1+To R
63+For
R
1+(V
1+-V
2+)/I
+
R
2+(V
2+-V
3+)/I
+
：
：
：
R
63+＝(V
63+-V
64+)/I
+
In like manner, suppose that the first negative polarity driving voltage V1-equals negative polarity reference voltage V
GMA3And the 64th negative polarity driving voltage V64-equals negative polarity reference voltage V
GMA4The time, can further obtain the resistance value R of negative polarity resistance string
1-To R
63-For
R
1-＝(V
1-V
2-)/I
-
R
2-＝(V
2--V
3-)/I
-
：
R
63-＝(V
63--V
64-)/I
-
Wherein the resistance value of i positive polarity resistance is different from the resistance value of i negative polarity resistance.
Hence one can see that, and the advantage of the embodiment of the invention calculates according to the positive polarity driving voltage for the resistance value with positive polarity resistance, and the resistance value of negative polarity resistance calculates according to the negative polarity driving voltage.So, can make that all the positive-negative polarity driving voltage reaches desired value and makes that the positive-negative polarity driving voltage is symmetrical no matter several groups of external control voltages are arranged.
Please refer to Fig. 7, Fig. 7 is the schematic diagram of the source electrode drive circuit of the embodiment of the invention.Source electrode drive circuit 700 comprises: GTG signal receiving unit 710, D/A conversion unit 720 and output unit 730.Beneath explanation is an example with the GTG signal of 6Bit.GTG signal receiving unit 710 receives GTG signal IN.D/A conversion unit 720 receives an output signal of GTG signal receiving unit 710 to convert one of first to the 63rd positive polarity driving voltage and one of first to the 63rd negative polarity driving voltage to.D/A conversion unit 720 is according to positive polarity reference voltage V
GMA1With V
GMA2To estimate out first to the 63rd positive polarity driving voltage, according to negative polarity reference voltage V
GMA3With V
GMA4To estimate out first to the 63rd negative polarity driving voltage.D/A conversion unit 720 comprises a positive-negative polarity resistance string unit 721.Positive-negative polarity resistance string unit 721 has first to the 63rd positive polarity resistance of series connection and first to the 63rd negative polarity resistance of connecting.
In sum, the embodiment of the invention provides a kind of D/A conversion unit and has used its source electrode drive circuit, can make the both positive and negative polarity driving voltage have preferable symmetry by different positive-negative polarity resistance string, and then the Gamma curve is improved.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those of ordinary skills, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is when with being as the criterion that claim was defined.
Claims (7)
1. D/A conversion unit, receive at least one first positive polarity reference voltage, one second positive polarity reference voltage, one first negative polarity reference voltage and one second negative polarity reference voltage, according to this first and second positive polarity reference voltage to estimate out first to N positive polarity driving voltage, according to this first and second negative polarity reference voltage to estimate out first to N negative polarity driving voltage, N is a positive integer, and this D/A conversion unit comprises:
One positive polarity resistance string, have series connection first to (N-1) positive polarity resistance, the resistance value of this i positive polarity resistance is relevant to the voltage difference between this i positive polarity driving voltage and this (i+1) positive polarity driving voltage, i is a positive integer; And
One negative polarity resistance string, have series connection first to (N-1) negative polarity resistance, the resistance value of this i negative polarity resistance is relevant to the voltage difference between this i negative polarity driving voltage and this (i+1) negative polarity driving voltage;
Wherein the resistance value of this i positive polarity resistance is different from the resistance value of this i negative polarity resistance.
2. D/A conversion unit as claimed in claim 1, it is characterized in that, as when making the first positive polarity driving voltage equal this first positive polarity reference voltage and this N positive polarity driving voltage equaling this second positive polarity reference voltage, the resistance value of this i positive polarity electricity sun can be expressed as follows:
R
i+＝(V
i+-V
(i+1)+)/I
+
Wherein, Ri+ represents the resistance value of this i positive polarity resistance, V
I+Represent this i positive polarity driving voltage, V
(i+1)+Represent this (i+1) positive polarity driving voltage, I
+Represent the electric current of this positive polarity resistance string of flowing through.
3. D/A conversion unit as claimed in claim 1, it is characterized in that, as when making the first negative polarity driving voltage equal this first negative polarity reference voltage and this N negative polarity driving voltage equaling this second negative polarity reference voltage, the resistance value of this i negative polarity electricity sun can be expressed as follows:
R
i-＝(V
i--V
(i+1)-)/I
-
Wherein, R
I-Represent the resistance value of this i negative polarity resistance, V
I-Represent this i negative polarity driving voltage, V
(i+1)-Represent this (i+1) negative polarity driving voltage, I
-Represent the electric current of this negative polarity resistance string of flowing through.
4. a source electrode drive circuit is used to drive a display unit, and this source electrode drive circuit comprises:
One GTG signal receiving unit receives a GTG signal;
One D/A conversion unit, an output signal that receives this GTG signal receiving unit with convert to first to one of N positive polarity driving voltage with first to one of N negative polarity driving voltage, N is a positive integer, this D/A conversion unit according to this first and second positive polarity reference voltage to estimate out first to N positive polarity driving voltage, according to this first and second negative polarity reference voltage to estimate out first to N negative polarity driving voltage, this D/A conversion unit have series connection first to (N-1) positive polarity resistance with connect first to (N-1) negative polarity resistance, this i positive polarity resistance is across between this i positive polarity driving voltage and this (i+1) positive polarity driving voltage, i is a positive integer, this i negative polarity resistance is across between this i negative polarity driving voltage and this (i+1) negative polarity driving voltage, and the resistance value of this i positive polarity resistance is different from the resistance value of this i negative polarity resistance; And
One output unit, receive that this D/A conversion unit exports first to one of N positive polarity driving voltage with first to one of N negative polarity driving voltage to drive this display unit.
5. source electrode drive circuit as claimed in claim 4, it is characterized in that, as when making this first positive polarity driving voltage equal this first positive polarity reference voltage and this N positive polarity driving voltage equaling this second positive polarity reference voltage, the resistance value of this i positive polarity resistance can be expressed as follows:
R
i+＝(V
i+-V
(i+1)+)/I
+
Wherein, R
I+Represent the resistance value of this i positive polarity resistance, V
I+Represent this i positive polarity driving voltage, V
(i+1)+Represent this (i+1) positive polarity driving voltage, I
+Represent the electric current of those positive polarity resistance of flowing through.
6. source electrode drive circuit as claimed in claim 4, it is characterized in that, as when making this first negative polarity driving voltage equal this first negative polarity reference voltage and this N negative polarity driving voltage equaling this second negative polarity reference voltage, the resistance value of this i negative polarity resistance can be expressed as follows:
R
i-＝(V
i--V
(i+1)-)/I
-
Wherein, R
I-Represent the resistance value of this i negative polarity resistance, V
I-Represent this i negative polarity driving voltage, V
(i+1)-Represent this (i+1) negative polarity driving voltage, I
-Represent the electric current of those negative polarity resistance of flowing through.
7. the driving method of a display unit comprises the following steps:
Receive a GTG signal;
To estimate out first to N positive polarity driving voltage, wherein N is a positive integer according to first and second positive polarity reference voltage;
According to first and second negative polarity reference voltage to estimate out first to N negative polarity driving voltage;
Utilize estimated out this first to first the resistance value to (N-1) positive polarity resistance of N positive polarity driving voltage to obtain connecting, this i positive polarity resistance is across between this i positive polarity driving voltage and this (i+1) positive polarity driving voltage, and i is a positive integer;
Utilize estimated out this first to first the resistance value to (N-1) negative polarity resistance of N negative polarity driving voltage to obtain connecting, this i negative polarity resistance is across between this i negative polarity driving voltage and this (i+1) negative polarity driving voltage, and the resistance value of this i positive polarity resistance is different from the resistance value of this i negative polarity resistance; And
Utilize one of one of those positive polarity driving voltages or those negative polarity driving voltages to drive this display unit.
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|---|---|---|---|
| CN200610153790A CN100583648C (en) | 2006-09-14 | 2006-09-14 | D/A conversion unit, source pole driving circuit and display device drive method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610153790A CN100583648C (en) | 2006-09-14 | 2006-09-14 | D/A conversion unit, source pole driving circuit and display device drive method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101145782A true CN101145782A (en) | 2008-03-19 |
| CN100583648C CN100583648C (en) | 2010-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103839530A (en) * | 2014-03-25 | 2014-06-04 | 深圳市华星光电技术有限公司 | Source electrode driving module and liquid crystal display panel |
| TWI567726B (en) * | 2014-12-31 | 2017-01-21 | 天鈺科技股份有限公司 | Digital to analog converter and source driver |
-
2006
- 2006-09-14 CN CN200610153790A patent/CN100583648C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103839530A (en) * | 2014-03-25 | 2014-06-04 | 深圳市华星光电技术有限公司 | Source electrode driving module and liquid crystal display panel |
| TWI567726B (en) * | 2014-12-31 | 2017-01-21 | 天鈺科技股份有限公司 | Digital to analog converter and source driver |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100583648C (en) | 2010-01-20 |
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