CN1746964A - Grayscale voltage generating circuit and method - Google Patents
Grayscale voltage generating circuit and method Download PDFInfo
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- CN1746964A CN1746964A CNA2005101036232A CN200510103623A CN1746964A CN 1746964 A CN1746964 A CN 1746964A CN A2005101036232 A CNA2005101036232 A CN A2005101036232A CN 200510103623 A CN200510103623 A CN 200510103623A CN 1746964 A CN1746964 A CN 1746964A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Combined Controls Of Internal Combustion Engines (AREA)
- Valve Device For Special Equipments (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
A grayscale voltage generation circuit comprises an input/driving stage circuit and output stage circuits, wherein the input/driving stage circuit amplifies input voltage; each output stage circuit which has a capacitor retaining the voltage level of grayscale voltages is used to receive the output voltage of the input/driving stage circuit and to output one of the grayscale voltages. The output stage circuits are switched in turn to be connected with the input/driving stage circuit; moreover, the output voltages of the input/driving stage circuit are fed into the output stage circuits in turn. Each output stage circuit outputs grayscale voltage according to the voltage retained in the capacitor, which is not relevant to the fact whether the output stage circuit is connected with the input/driving stage circuit.
Description
Technical field
The present invention relates to a kind of grayscale voltage generating circuit and method that is used to drive multicolor displaying equipment.
Background technology
Usually, the voltage of source terminal that is applied to the thin film transistor (TFT) (TFT) of each pixel that offers liquid crystal panel by change is regulated the brightness of the liquid crystal panel of the active array type liquid crystal display that uses TFT.Finally, liquid crystal display is equipped with and can generates the multilevel voltage grayscale voltage generating circuit of (being called hereinafter, " gray-scale voltage ").
Fig. 3 shows the voltage of the source terminal that is applied to TFT and the example of the relation between the gray-scale value.With 21 to 28 gray-scale voltages of representing corresponding to 8 grades of gray levels.In order to regulate brightness with 8 grades of gray levels shown in Figure 3, liquid crystal display should be introduced the grayscale voltage generating circuit that can generate corresponding to the gray-scale voltage of 8 gray-scale values.Similarly, the liquid crystal display that is used for regulating with 64 grades of gray levels brightness should be introduced the grayscale voltage generating circuit that can generate corresponding to the gray-scale voltage of 64 gray-scale values.This grayscale voltage generating circuit is disclosed in for example Japanese unexamined patent publication No. open No.06-348235 (Sumiya), No.11-281953 (Watanabe) and No.2002-366112 (Kudoh).
Fig. 4 shows the constructive example that liquid crystal display is introduced grayscale voltage generating circuit.The gray-scale voltage that generates in grayscale voltage generating circuit 41 is imported in the signal line drive 42.Signal line drive 42 offers every signal line of liquid crystal panel 43 with gray-scale voltage, that is to say, offers every the source electrode line that is used for voltage is applied to the source terminal of the TFT that offers each pixel.Signal line drive 42 is selected the gray-scale voltage corresponding to viewdata signal Sd from the gray-scale voltage signal of exporting from grayscale voltage generating circuit 41, and the gray-scale voltage of selecting is offered signal wire to drive liquid crystal panel 43.
In Fig. 4, scan line driver 44 offers the sweep trace of liquid crystal panel 43 with voltage, that is to say, offers the gate line that is used for grid voltage is offered TFT.Above-mentioned signal wire drives 42 synchronously will impose on all signal wires corresponding to the voltage of the brightness of each pixel with the scanning sequence of scan line driver 44.Thus, liquid crystal panel 43 demonstrations are corresponding to the image of a frame.
Fig. 5 shows the structure example of existing grayscale voltage generating circuit 41.Voltage between high level reference voltage VDD and the low level reference voltage VSS by ladder resistor 51 dividing potential drops to generate n level gray-scale voltage thus.Be applied to the non-inverting input of operational amplifier OP1 by the gray-scale voltage of ladder resistor 51 dividing potential drops to OPn.Each all comprises the negative-feedback circuit that connects between output terminal and the inverting input to operational amplifier OP1 to OPn, and as be used for output equivalent in the voltage follower of the voltage of input voltage with conversion output impedance.Be fed to signal line drive 42 to the output voltage V 1 to Vn of OPn as the gray-scale voltage signal from operational amplifier OP1.For example, under the situation that 8 grades of gray levels are provided, be fed to signal line drive 42 to the output voltage V 1 to V8 of OP8 as gray-scale voltage from 8 operational amplifier OP1.
In addition, by by be positioned at operational amplifier OP1 to the ladder resistor 52 further dividing potential drops of the outgoing side of OPn from the output voltage of operational amplifier OP1 to OPn, the grayscale voltage generating circuit 41 of Fig. 5 can generate more multistage gray-scale voltage.Japanese unexamined patent publication No. open No.2002-366112 (Kudoh) disclose wherein output voltage from 10 operational amplifiers by resistor further by dividing potential drop to generate the structure example of 64 grades of grayscale voltages.
Shown in Figure 5 is another grayscale voltage generating circuit, and the resistor that is connected in series that wherein constitutes resistor ladder 51 is variohm (for example, seeing open No.06-348235 (Sumiya) of Japanese unexamined patent publication No. and 2002-366112 (Kudoh)).If change the resistance of variohm, operational amplifier OP1 changes to the level of the input voltage of OPn so, changes the output voltage V 1 to Vn of operational amplifier OP1 to OPn thus.Therefore, change the resistance of the variohm that constitutes ladder resistor 51 gray-scale voltage is adjusted to the gray level feature of hope.
But the present invention recognizes that above-mentioned existing grayscale voltage generating circuit need be used for a plurality of operational amplifiers of output gray level step voltage according to the quantity of gray-scale value.Usually, 8 grades of grayscale voltage generating circuits generate gray-scale voltage with 8 operational amplifiers.In addition, use 10 operational amplifiers as disclosed 64 grades of grayscale voltage generating circuits among the open No.2002-366112 (Kudoh) of Japanese unexamined patent publication No..In the grayscale voltage generating circuit of this generation multi-stage grey scale step voltage, need arrange on chip has increased area of chip by a plurality of operational amplifiers unfriendly.
Summary of the invention
According to an aspect of the present invention, provide a kind of grayscale voltage generating circuit that is used to generate a plurality of gray-scale voltages.This circuit comprises: the input/driving stage circuit that amplifies input voltage; And a plurality of output-stage circuits with capacitor of the voltage level that keeps gray-scale voltage, be used for receiving from the output voltage of input/driving stage circuit and export of a plurality of gray-scale voltages.In grayscale voltage generating circuit, a plurality of output-stage circuits sequentially switch to import/the driving stage circuit is connected, and the output voltage from input/driving stage circuit is fed to a plurality of output-stage circuits successively, whether and each in a plurality of output-stage circuits exported in a plurality of gray-scale voltages one according to remaining on voltage in the capacitor, have nothing to do and be connected with input/driving stage circuit with.According to this structure, the required a plurality of operational amplifiers of output gray level step voltage can be shared input/driving stage circuit.Therefore, the input/driving stage circuit that is positioned on the chip can be by shared, and only arrange output-stage circuit according to the quantity of gray-scale voltage.
According to a further aspect in the invention, provide a kind of generation to be used to drive the method for a plurality of gray-scale voltages of display element.This method comprises: first complementary transistor and the driving circuit that drives a plurality of complementary transistors that connect a plurality of complementary transistors that are used for the output gray level step voltage; Export first voltage from first complementary transistor, and will be in the grid and the charging of first capacitor between the source electrode of first complementary transistor; Driving circuit switched to second complementary transistor in a plurality of complementary transistors be connected; Export second voltage from second complementary transistor, and will be in the grid and the charging of second capacitor between the source electrode of second complementary transistor; Even and switch to when being connected at driving circuit with second complementary transistor, remain on voltage in first capacitor by use, continue output first voltage from first complementary transistor.According to this method, in grayscale voltage generating circuit, the required a plurality of operational amplifiers of output gray level step voltage can sharedly be imported/the driving stage circuit.
According to the present invention, in grayscale voltage generating circuit, the required a plurality of operational amplifiers of output gray level step voltage can sharedly be imported/the driving stage circuit.
Description of drawings
From following explanation in conjunction with the accompanying drawings, above and other objects of the present invention, advantage and feature will be more obvious, wherein:
Fig. 1 shows the figure of grayscale voltage generating circuit of the present invention;
Fig. 2 is an oscillogram, shows the output voltage of grayscale voltage generating circuit of the present invention;
Fig. 3 shows number of grey levels and is applied to relation between the voltage of liquid crystal panel;
Fig. 4 shows the figure of available liquid crystal display device; And
Fig. 5 shows the figure of existing grayscale voltage generating circuit.
Embodiment
At this present invention is described referring now to illustrative embodiment.Those skilled in the art will recognize that, use of the present invention telling about to finish many alternative embodiments and the present invention is not limited to be used for the illustrated embodiment of illustrative purpose.
The first embodiment of the present invention
Typical operational amplifier is made up of input stage circuit, driving stage circuit and output-stage circuit.Differential voltage between the input voltage of input stage circuit amplification non-inverting input and the input voltage of inverting input.The driving stage circuit will be fed to output-stage circuit from the differential voltage of input stage circuit output.In addition, output-stage circuit is according to exporting the voltage that is used to drive such as the external loading of liquid crystal cell from the voltage signal of driving stage circuit input.Different with the structure of the operational amplifier (voltage follower) of aforementioned existing grayscale voltage generating circuit 41 grades, have the shared input stage circuit of a plurality of operational amplifiers (voltage follower) and driving stage circuit and the feature of output-stage circuit only is provided respectively according to the grayscale voltage generating circuit 10 of the embodiment of the invention.
Fig. 1 shows the structure of the grayscale voltage generating circuit of present embodiment.To Rn, the voltage between ladder resistor 11 pairs of high level reference voltages VDD and the low level reference voltage VSS carries out dividing potential drop by means of the resistor R0 that is connected in series.Notice that resistor R0 can be fixed resister or variohm as shown in Figure 1 to Rn.Suppose that resistor R0 is variohm to Rn as discussing in the explanation of prior art, change resistor R0 to the resistance of Rn thus gray-scale voltage is adjusted to the gray level feature of needs.
Input/driving stage circuit 13 is corresponding to input stage circuit and the driving stage circuit of forming operational amplifier.Input/driving stage circuit 13 combines with output- stage circuit 14 or 15 described below, as the univoltage follower work that is used to change output impedance.The output stage drive end 132 and 133 of input/driving stage circuit 13 is connected to the transistorized gate terminal of forming output-stage circuit 14 described below or 15.In addition, inverting input 134 is connected to the output of output-stage circuit 14 described below or 15.
Output- stage circuit 14 or 15 each all corresponding to the output-stage circuit of forming operational amplifier.Constitute output-stage circuit 14 by the drain electrode of connection P channel MOS transistor MP1 and the drain electrode of N-channel MOS transistor MN1.The drain electrode end of transistor MP1 and MN1 is connected to the inverting input 134 and the ladder resistor 16 of input/driving stage circuit 13.In addition, the grid of transistor MP1 is connected to the output stage drive end 132 of input/driving stage circuit 13, and the grid of transistor MN1 is connected to the output stage drive end 133 of input/driving stage circuit 13.In addition, output stage driving circuit 14 comprises the grid that is inserted in P channel MOS transistor MP1 and the capacitor CP1 between the source electrode, and is inserted in the grid of N-channel MOS transistor MN1 and the capacitor CN1 between the source electrode.In addition, output-stage circuit 14 comprises the switch SW 1 that is used for being connected/disconnecting with input/driving stage circuit 13 connection.
Notice that the structure of output-stage circuit 15 is identical with the structure of output-stage circuit 14, so the descriptions thereof are omitted at this.For convenience of description, from Fig. 1, omitted out output-stage circuit outside the output-stage circuit 14 and 15.In fact, comprise n output-stage circuit altogether, to generate gray-scale voltage V1 corresponding to n level gray level to Vn according to the grayscale voltage generating circuit 10 of present embodiment.In brief, structure grayscale voltage generating circuit 10 makes n output-stage circuit to be connected with an input/driving stage circuit 13.
The grayscale voltage generating circuit 10 of Fig. 1 generates the gray-scale voltage identical with the quantity of output-stage circuit, but further the output voltage from output-stage circuit being carried out dividing potential drop by stairing circuit 16 can generate more multi-stage grey scale step voltage.
The work of grayscale voltage generating circuit 10 then, is described.Following explanation concentrates on: when selector circuit 12 was selected the node T1 of Fig. 1, the voltage that will be input to non-inverting input 131 was as the circuit operation under the situation of output voltage V 1 output of output-stage circuit 14; And when selector circuit 12 is selected the node T2 of Fig. 1, will be input to the voltage of non-inverting input 131 as the circuit operation under the situation of the output voltage V n output of output-stage circuit 15.Voltage at T1 end and T2 end place is represented with Vin1 and Vin2 respectively.
(1) at first, selector switch 12 is selected node T1.Then, the switch SW 1 of output-stage circuit 14 is connected, and the switch of switch SW 2 and the output-stage circuit except output-stage circuit 14 disconnects.Therefore, input/driving stage circuit 13 and output-stage circuit 14 have constituted an operational amplifier, the voltage follower of more specifically saying so.At this moment, the voltage Vin1 that is imported into the node T1 place of non-inverting input 131 exports as voltage V1 via input/driving stage circuit 13 and output-stage circuit 14.In addition, capacitor CP1 and CN1 are recharged, and keep the gate source voltage VGS of transistor MP1 and the gate source voltage VGS of transistor MN1.
(2) then, switch SW 1 disconnects, thereby whole switches of output-stage circuit are in off-state.At this moment, owing to the voltage that remains among capacitor CP1 and the CN1, the gate source voltage similar to the voltage that applied before switch SW 1 disconnection is applied to transistor MP1 and 1MN1, keeps output voltage V 1 level of output-stage circuit 14 thus.
(3) selector circuit 12 is selected node T2.Then, the switch SW 2 of output-stage circuit 15 is connected, and the switch of switch SW 1 and the output-stage circuit except output-stage circuit 15 disconnects.Therefore, input/driving stage circuit 13 and output-stage circuit 15 have constituted an operational amplifier, the voltage follower of more specifically saying so.At this moment, the voltage Vin2 that is imported into the node T2 place of non-inverting input 131 exports as voltage Vn via input/driving stage circuit 13 and output-stage circuit 15.In addition, capacitor CPn and CNn are recharged, and keep the gate source voltage VGS of transistor MPn and the gate source voltage VGS of transistor MNn.
(4) switch SW 2 disconnects, thereby whole switches of output-stage circuit are in off-state.At this moment, owing to the voltage that remains among capacitor CPn and the CNn, the gate source voltage similar to the voltage that applied before switch SW 2 disconnections is applied to transistor MPn and MNn, keeps the output voltage V n level of output-stage circuit 15 thus.
To (4), the output voltage from output- stage circuit 14 and 15 can be adjusted to the gray-scale voltage of hope by aforesaid operations (1).In (4), regulate the skew that output voltage V 1 causes output voltage V n at aforesaid operations (1).Otherwise, regulate output voltage V n and cause output voltage V 1 skew.But, if repeat aforesaid operations (1) to (4), this skew takes place hardly.As a result, output voltage finally is stabilized in the magnitude of voltage of hope.Suppose to repeat aforesaid operations (1) to (4) m time, can obtain the magnitude of voltage of output voltage V 1 and Vn so from following formula:
V1＝Vin1-(Vin1/4
m-Vin2/(2*4
m-1))
Vn＝Vin2-(Vin2/4
m-Vin1/(2*4
m))
From these formula as can be seen, if repeat aforesaid operations, voltage V1 converges on Vin1, and voltage Vn converges on Vin2.
Fig. 2 is analog waveform figure, how shows output voltage V 1 and Vn and be convergent.Notice that the analog result of Fig. 2 obtains under the following conditions, i.e. Vin1=+4V, Vin2=+3.5V, and repeat these a series of operations (1) to (4) with the cycle of 0.04ms.Fig. 2 has shown that output voltage V 1 and Vn are stabilized in the magnitude of voltage of hope as the result of repeated several times operation.
As mentioned above, by selector circuit 12 with such as the operation of switches such as switch SW 1 and SW2, comprise output- stage circuit 14 and 15 output-stage circuit sequentially switch to import/driving stage circuit 13 is connected, and is fed to output-stage circuit successively from the output voltage of input/driving stage circuit 13.
As noted above, existing grayscale voltage generating circuit needs and the as many operational amplifier of gray-scale value.On the contrary, can form by single input/driving stage circuit and a plurality of output-stage circuit according to grayscale voltage generating circuit of the present invention.Therefore, can reduce the chip area that occupies by grayscale voltage generating circuit.In addition, when using when substituting the grayscale voltage generating circuit 41 of available liquid crystal display device shown in Figure 4, can obtain to have the liquid crystal display of the chip area of less grayscale voltage generating circuit according to grayscale voltage generating circuit according to the present invention 10.
Obviously, the invention is not restricted to the foregoing description, and under the situation that does not depart from scope and spirit of the present invention, can make amendment and change.
Claims (13)
1. grayscale voltage generating circuit that is used to generate a plurality of gray-scale voltages comprises:
Be used to amplify the input/driving stage circuit of input voltage; And
A plurality of output-stage circuits with capacitor of the voltage level that keeps gray-scale voltage are used for receiving from the output voltage of input/driving stage circuit and export of a plurality of gray-scale voltages,
Wherein a plurality of output-stage circuits sequentially switch to import/the driving stage circuit is connected, and is fed to a plurality of output-stage circuits successively from the output voltage of input/driving stage circuit, and
Whether each in a plurality of output-stage circuits exported in a plurality of gray-scale voltages one according to remaining on voltage in the capacitor, have nothing to do and be connected with input/driving stage circuit with.
2. according to the grayscale voltage generating circuit of claim 1, wherein a plurality of output-stage circuits periodically switch to import/the driving stage circuit is connected with will be from each the output voltage stabilization in a plurality of output-stage circuits in predetermined value.
3. according to the grayscale voltage generating circuit of claim 1, wherein output-stage circuit comprises complementary transistor, and capacitor is between the grid and source electrode of complementary transistor.
4. according to the grayscale voltage generating circuit of claim 1, also comprise:
Selector circuit is used for from the input voltage of a plurality of voltages selections to input/driving stage circuit; And
Switch, be used for a plurality of output-stage circuits switch to import/the driving stage circuit is connected.
5. according to the grayscale voltage generating circuit of claim 4, wherein selector circuit and switch with a plurality of output-stage circuits switch to import/the driving stage circuit is connected and synchronously selects input voltage.
6. according to the grayscale voltage generating circuit of claim 4, wherein output-stage circuit comprises complementary transistor, and capacitor is between the grid and source electrode of complementary transistor.
7. grayscale voltage generating circuit that is used to generate a plurality of gray-scale voltages comprises:
First complementary transistor, it exports first voltage as one in a plurality of gray-scale voltages;
Second complementary transistor, it exports second voltage as one in a plurality of gray-scale voltages;
First capacitor, it is between the grid and source electrode of first complementary transistor;
Second capacitor, it is between the grid and source electrode of second complementary transistor;
Input/driving stage circuit, it is fed to first complementary transistor and second complementary transistor with input voltage; And
Switch, its with first complementary transistor and second complementary transistor switch to import/the driving stage circuit is connected.
8. according to the grayscale voltage generating circuit of claim 7, wherein change-over switch is to connect between the input/driving stage circuit and first complementary transistor, make the input/driving stage circuit and first complementary transistor as single operational amplifier work to export first voltage, and first capacitor is charged to keep the gate source voltage of first complementary transistor
Change-over switch is to connect between the input/driving stage circuit and second complementary transistor, make the input/driving stage circuit and second complementary transistor as single operational amplifier work to export second voltage, and with second capacitor charging keeping the gate source voltage of second complementary transistor, and
Even switch to after second complementary transistor is connected at input/driving stage circuit, use the gate source voltage that remains in first capacitor, first complementary transistor continues output first voltage.
9. according to the grayscale voltage generating circuit of claim 7, wherein first complementary transistor and second complementary transistor periodically are connected to input/driving stage circuit to stablize first voltage and second voltage.
10. according to the grayscale voltage generating circuit of claim 7, also comprise:
Selector circuit, it can select a voltage from a plurality of voltages that obtain by dividing potential drop between high level reference voltage and low level reference voltage, and this voltage of being selected by selector switch is set to import/input voltage of driving stage circuit.
11. according to the grayscale voltage generating circuit of claim 10, wherein by at a plurality of variohms that are connected in series between high level reference voltage and the low level reference voltage with the voltage dividing potential drop between high level reference voltage and the low level reference voltage.
12. a generation is used to drive the method for a plurality of gray-scale voltages of display element, comprising:
First complementary transistor and the driving circuit that drives a plurality of complementary transistors that connect a plurality of complementary transistors that are used for the output gray level step voltage;
Export first voltage from first complementary transistor, and will be in the grid and the charging of first capacitor between the source electrode of first complementary transistor;
Switch driving circuit is to being connected with second complementary transistor in a plurality of complementary transistors;
Export second voltage from second complementary transistor, and will be in the grid and the charging of second capacitor between the source electrode of second complementary transistor; And
Even switch to when being connected with second complementary transistor at driving circuit, remain on voltage in first capacitor by use, continue output first voltage from first complementary transistor.
13. according to the method for claim 12, wherein first complementary transistor periodically switches to driving circuit with second complementary transistor and is connected, to stablize first voltage and second voltage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004232113A JP4258453B2 (en) | 2004-08-09 | 2004-08-09 | Intake control device for internal combustion engine |
| JP2004232113 | 2004-09-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1746964A true CN1746964A (en) | 2006-03-15 |
Family
ID=36025142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005101036232A Pending CN1746964A (en) | 2004-08-09 | 2005-09-06 | Grayscale voltage generating circuit and method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4258453B2 (en) |
| CN (1) | CN1746964A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102122525A (en) * | 2011-04-14 | 2011-07-13 | 中国人民解放军国防科学技术大学 | Readout amplifying circuit for resistive random access memory (RRAM) cell |
| CN102129847A (en) * | 2010-01-19 | 2011-07-20 | 硅工厂股份有限公司 | Gamma reference voltage output circuit of source driver |
| CN105895041A (en) * | 2016-06-06 | 2016-08-24 | 深圳市华星光电技术有限公司 | Common electrode driver module and liquid crystal display panel |
| WO2020252754A1 (en) * | 2019-06-20 | 2020-12-24 | 深圳市汇顶科技股份有限公司 | Readout circuit, image sensor and electronic device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6371727B2 (en) | 2015-03-17 | 2018-08-08 | ヤンマー株式会社 | engine |
-
2004
- 2004-08-09 JP JP2004232113A patent/JP4258453B2/en not_active Expired - Fee Related
-
2005
- 2005-09-06 CN CNA2005101036232A patent/CN1746964A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102129847A (en) * | 2010-01-19 | 2011-07-20 | 硅工厂股份有限公司 | Gamma reference voltage output circuit of source driver |
| CN102122525A (en) * | 2011-04-14 | 2011-07-13 | 中国人民解放军国防科学技术大学 | Readout amplifying circuit for resistive random access memory (RRAM) cell |
| CN102122525B (en) * | 2011-04-14 | 2013-08-07 | 中国人民解放军国防科学技术大学 | Readout amplifying circuit for resistive random access memory (RRAM) cell |
| CN105895041A (en) * | 2016-06-06 | 2016-08-24 | 深圳市华星光电技术有限公司 | Common electrode driver module and liquid crystal display panel |
| US10147376B2 (en) | 2016-06-06 | 2018-12-04 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Common electrode driving module and liquid crystal display panel |
| WO2020252754A1 (en) * | 2019-06-20 | 2020-12-24 | 深圳市汇顶科技股份有限公司 | Readout circuit, image sensor and electronic device |
| US11303837B2 (en) | 2019-06-20 | 2022-04-12 | Shenzhen GOODIX Technology Co., Ltd. | Readout circuit, image sensor, and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4258453B2 (en) | 2009-04-30 |
| JP2006046285A (en) | 2006-02-16 |
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Correction item: Priority Correct: [32]2004.09.09[33]JP[31]2004-262113 False: [32]2004.09.09[33]JP[31]2004-232113 Number: 11 Volume: 22 |
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| CI02 | Correction of invention patent application |
Correction item: Priority Correct: [32]2004.09.09[33]JP[31]2004-262113 False: [32]2004.09.09[33]JP[31]2004-232113 Number: 11 Volume: 22 |
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Free format text: CORRECT: PRIORITY; FROM: [32]2004.9.9[33]JP [31]2004-232113 TO: [32]2004.9.9[33]JP [31]2004-262113 |
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| ERR | Gazette correction |
Free format text: CORRECT: PRIORITY; FROM: [32]2004.9.9[33]JP [31]2004-232113 TO: [32]2004.9.9[33]JP [31]2004-262113 |
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