CN101303489B - LCD device and matrix circuit thereof - Google Patents
LCD device and matrix circuit thereof Download PDFInfo
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- CN101303489B CN101303489B CN2007100743269A CN200710074326A CN101303489B CN 101303489 B CN101303489 B CN 101303489B CN 2007100743269 A CN2007100743269 A CN 2007100743269A CN 200710074326 A CN200710074326 A CN 200710074326A CN 101303489 B CN101303489 B CN 101303489B
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Abstract
The invention relates to a liquid crystal display (LCD) and an LCD matrix circuit. The LCD matrix circuit comprises a control wire drive circuit, a data wire drive circuit, a plurality of pixel control components, a control device and a sharing circuit, wherein, the control wire drive circuit is connected with a plurality of control wires; the data wire drive circuit is connected with a plurality of data wires; the pixel control components are respectively arranged in a plurality of pixel areas defined by the intersection of a plurality of control wires and a plurality of data wires; the control device and the sharing circuit are formed by the connection of a plurality of control components which respectively comprise a source electrode, a grid electrode and a drain electrode, wherein, the grid electrode is connected with the control device and the source electrode is connected with the data wires.
Description
Technical field
The present invention relates to a kind of LCD matrix circuit and adopt the LCD of this LCD matrix circuit.
Background technology
LCD generally includes a liquid crystal panel and and provides the module backlight of light source for it.This liquid crystal panel comprises that a upper substrate, an infrabasal plate and clamping are arranged on the liquid crystal layer between the upper and lower substrate.The liquid crystal molecule of this liquid crystal layer is controlled it by common electrode layer that is separately positioned on upper and lower substrate and matrix circuit layer and is turned to, and controls light transmission rate.
Yet along with the raising of increase of liquid crystal panel size and resolution, the length of data conductor and pilot also increases thereupon, causes the capacitance resistance effect on the data conductor also to increase thereupon.When a drive signal was carried out away from transmission from the output terminal of driving circuit along data conductor, the waveform of this drive signal just produced serious distortion, caused the picture distortion of liquid crystal display displays or had the situation of brightness disproportionation to take place.
At the problems referred to above, this advances industry in addition aspect material usually, makes data conductor as the material with low resistivity.In addition, employing is also arranged, the undercharge situation of avoiding the output waveform distortions because of driving circuit to produce to the precharge mode of data lead.
Seeing also Fig. 1, is a kind of prior art LCD matrix circuit figure.This LCD comprises that second substrate 2, that one first substrate (figure do not show), one and first substrate are oppositely arranged is sandwiched in liquid crystal layer (scheming not show), a data conductor driving circuit 4, a pilot driving circuit 6, many data conductor 8, many pilots 10, a plurality of shared circuit controling assembly 12 and the pre-charging devices 14 between two substrates.Wherein, this data drive circuit 4 links to each other with data conductor 8, and this pilot driving circuit 6 links to each other with this pilot 10.Many pilots of these many data conductor 8 and this 10 intersect a plurality of pixel regions of formation.Respectively have a pixel Control Component 16 and a pixel electrode 18 in this pixel region respectively.This pixel Control Component 16 is thin film transistor (TFT) (Thin Film Transistor, TFT), it has one source pole 20, a grid 22 and a drain electrode 24, and this grid 22 links to each other with this pilot 10, source electrode 20 links to each other with data conductor 8, and drain electrode 24 links to each other with pixel electrode 18.Should share circuit controling assembly 12 is arranged on this second substrate 2, it also is a thin film transistor (TFT), have one source pole 26, a grid 28 and a drain electrode 30 respectively, this source electrode 26 and should drain electrode 30 linking to each other with adjacent this drain electrode 30 and this source electrode 26 respectively wherein, and link to each other with this pre-charging device 14, this grid 28 also is connected with this pre-charging device 14 respectively.
When the work of this LCD, control the turning to of liquid crystal molecule of liquid crystal layer with the common electrode layer (figure does not show) and the voltage difference of this pixel electrode 18 of first substrate.At first, this pre-charging device 14 provides the grid 28 of an enable signal to this shared circuit controling assembly 12, makes the source electrode 26 and these 30 conductings that drain of this shared circuit controling assembly 12.Then, this pre-charging device 14 provides a pre-charge pressure near common electrode layer voltage, source electrode 26 by this shared circuit controling assembly 12 and this drain electrode 30 offer this data conductor 8 with this pre-charge pressure, make the voltage of this data conductor 8 be similar to the voltage of common electrode layer.Then, this pre-charging device 14 and this grid 28 are disconnected, make the source electrode 26 of this shared Control Component 12 simultaneously and drain 30 to disconnect with this data conductor 8.Then, provide a control signal to this pilot 10 by this pilot driving circuit 6, simultaneously, this data conductor driving circuit 4 also provides a data-signal to this data conductor 8, provides electric energy that this source electrode 20 is linked to each other with this drain electrode 24 by the grid 22 for this pixel Control Component 16.Then, this data-signal then charges to this pixel electrode 18.
In the prior art, utilize 14 pairs of data leads 8 of pre-charging device device that a pre-charge pressure is provided, earlier the voltage of data conductor is promoted to the voltage of approximate common electrode layer, avoid the factor number of it is believed that in end distortion, cause the phenomenon of pixel electrode 18 undercharges is taken place away from data conductor driving circuit 4.Yet the LCD matrix circuit need use an external pre-charging device 14 in the prior art, can increase extra manufacturing process, causes yield lower, and cost is higher.
Summary of the invention
In order to solve the many shortcomings of prior art LCD matrix circuit manufacturing technology steps, be necessary the LCD matrix circuit that provides a kind of manufacturing technology steps few.
In addition, in order to solve the many shortcomings of prior art process for manufacturing liquid crystal display step, be necessary the LCD that provides a kind of manufacturing technology steps few.
A kind of LCD matrix circuit, it comprises a pilot driving circuit, many pilot links to each other with this pilot driving circuit, one data conductor driving circuit, many data conductor links to each other with this data conductor driving circuit, a plurality of pixel Control Components are arranged at these many pilots respectively and intersect in a plurality of pixel regions that defined a plurality of pixel electrodes with these many data conductor, one control device, and one share circuit, by a plurality of Control Components link to each other form, these a plurality of Control Components comprise one source pole respectively, one grid, and one the drain electrode, wherein this grid links to each other with this control device, and this source electrode links to each other with this data conductor.When this LCD matrix circuit work, this control device provides an enable signal these a plurality of Control Component conductings of control earlier so that this many data conductor link to each other, then this pilot driving circuit provides a control signal to pilot, this data conductor driving circuit provides a data-signal that these a plurality of pixel electrodes are carried out precharge, these these a plurality of Control Components of control device control disconnect so that these many data conductor disconnect then, and then this data conductor driving circuit charges to required voltage by the corresponding data lead to this pixel electrode.
A kind of LCD, it comprises a upper substrate, an infrabasal plate, a shared circuit, and a liquid crystal layer.Wherein this infrabasal plate comprises many pilots, many data conductor, a plurality of pixel Control Component, a plurality of pixel electrode, control device and shared circuit.Should share circuit and form by a plurality of Control Components are continuous, these a plurality of Control Components comprise one source pole respectively, a grid, and a drain electrode, and wherein this grid links to each other with this control device, and this source electrode links to each other with this data conductor with this drain electrode.This upper substrate has a common electrode layer.These a plurality of pixel Control Components are arranged at these many pilots respectively and intersect in the pixel region that is defined with these many data conductor.This liquid crystal layer is held between this upper substrate and the infrabasal plate.This LCD also comprises a pilot driving circuit that links to each other with these many pilots and a data conductor driving circuit that links to each other with these many data conductor.When this LCD work, this control device provides an enable signal these a plurality of Control Component conductings of control earlier so that this many data conductor link to each other, then this pilot driving circuit provides a control signal to pilot, this data conductor driving circuit provides a data-signal that these a plurality of pixel electrodes are carried out precharge, these these a plurality of Control Components of control device control disconnect so that these many data conductor disconnect then, and then this data conductor driving circuit charges to required voltage by the corresponding data lead to this pixel electrode.
Compared with prior art, control device and pixel electrode form in the same step of manufacturing process in the LCD matrix circuit of the present invention, therefore the manufacturing technology steps that forms the LCD matrix circuit is few, can reduce the manufacturing technology steps that forms LCD simultaneously.
Description of drawings
Fig. 1 is a kind of prior art LCD matrix circuit figure.
Fig. 2 is LCD matrix circuit one a better embodiment circuit diagram of the present invention.
Fig. 3 is LCD matrix circuit waveform input signal figure shown in Figure 2.
Embodiment
Fig. 2 is the circuit diagram of LCD matrix circuit one better embodiment of the present invention.This LCD comprises that liquid crystal layer (figure does not show), a data conductor driving circuit 34, a pilot driving circuit 36, many data conductor 38, many pilots 40, that second substrate 32, that one first substrate (figure do not show), is oppositely arranged with this first substrate is sandwiched between two substrates have one of a plurality of shared circuit controling assemblies 42 and share a circuit (sign) and a control device 44.Wherein data drive circuit 34 links to each other with data conductor 38, and control Driver Circuit 36 links to each other with pilot 40.This data conductor 38 intersects a plurality of pixel regions of formation with this pilot 40.Have a pixel Control Component 46 and a pixel electrode 48 in each pixel region respectively.Wherein pixel Control Component 46 is a thin film transistor (TFT), and it has one source pole 50, a grid 52 and a drain electrode 54, and source electrode 50 links to each other with data conductor 38, and grid 52 links to each other with pilot 40, drains 54 to link to each other with pixel electrode 48.Should share circuit controling assembly 42 and be arranged on this second substrate 32, it also is a thin film transistor (TFT), and this thin film transistor (TFT) has one source pole 56, a grid 58 and a drain electrode 60.Should share circuit controling assembly 42 and be formed on simultaneously on second substrate, and material is identical with pixel Control Component 46.The source electrode 56 of the shared circuit controling assembly 42 that each is adjacent links to each other with drain electrode 60, and all links to each other with data conductor 38.This control device 44 is arranged on this second substrate 32, links to each other with the grid 58 of data conductor driving circuit 34, pilot driving circuit 36 and each shared circuit controling assembly 42.
When LCD is worked, at first, control device 44 provides the grid 58 of an enable signal to this data conductor driving circuit 34, pilot driving circuit 36 and shared circuit controling assembly 42, and make the source electrode 56 and drain electrode 60 conductings of sharing circuit controling assembly 42, respectively arrange data conductor 38 this moment and link to each other with drain electrode 60 via the source electrode 56 of this shared circuit controling assembly 42.Then, pilot driving circuit 36 provides a control signal to pilot 40, simultaneously, data conductor driving circuit 34 provides a data-signal to data conductor 38, grid 58 via pixel Control Component 46, source electrode 50 is linked to each other with drain electrode 54, pixel electrode 48 is charged with this data-signal.Adopt at existing pixel region under the structure of some counter-rotating or line counter-rotating, the pixel electrode 48 that data conductor 38 of each row is connected links to each other via this shared circuit controling assembly 42 and is charged to the voltage of the common electrode layer (figure does not show) near first substrate in advance.Then, disconnect the grid 58 of control device 44 and shared circuit controling assembly 42, data conductor 38 of each row is disconnected.Then, data conductor driving circuit 34 continues to provide this data-signal, makes each pixel electrode 48 charge to required voltage.Wherein, the enable signal of the voltage of pixel electrode 48 and control device 44 and the relativeness of time please refer to Fig. 3.
Seeing also Fig. 3, is LCD matrix circuit waveform input signal figure shown in Figure 2.This oscillogram comprises: the voltage Vcom of a common electric voltage layer, the enable signal ES of the voltage PV of a pixel electrode 48 and a control device 44.When time point T1, this control device 44 provides an activation signal to this shared circuit controling assembly 42, makes respectively to arrange data conductor 38 and link to each other via this shared circuit controling assembly 42.Then, this data conductor driving circuit 34 provides a data-signal for this data conductor 38, and this pixel electrode 48 is carried out precharge.During to T3, the pixel electrode 48 that links to each other with each row's data conductor 38 carries out precharge, and keeps the electric Vcom near the common electric voltage layer at time point T2.When time point T3, this control device 44 disconnects with the grid 58 that should share circuit controling assembly 42, and each row's data conductor 38 is disconnected separately.T3 is during to T4, and this data conductor driving circuit 34 continues pixel electrode 48 is charged to required voltage.T4 is during to T5, and this pilot driving circuit 34 disconnects with the grid 52 of pixel electrode 48, and source electrode 50 and drain electrode 54 are disconnected, and then makes this pixel electrode 48 stop charging and maintain this voltage.Time point T5 then repeats above-mentioned precharge step to T6.
In this LCD, pixel electrode 48 forms a voltage difference with the public electrode interlayer, by turning to of liquid crystal molecule in this voltage difference control liquid crystal layer, reaches the purpose of control back light transmitance.In the present embodiment, each arranges the mode of data conductor 38 with share voltage, earlier the voltage of data conductor 38 is charged in advance the voltage of approximate common electrode layer, to reach precharge purpose, avoid data conductor 38 at end away from data conductor driving circuit 34, the factor number of it is believed that distortion, distortion cause the phenomenon to pixel electrode 48 undercharges to take place.This control device 44 is same manufacturing process with pixel Control Component 46, need not increase extra manufacturing technology steps, can improve yield, reduces cost.
Claims (4)
1. LCD matrix circuit, it comprises: a pilot driving circuit, a data conductor driving circuit, a plurality of pixel Control Component, a plurality of pixel electrode and a control device, many pilots link to each other with this pilot driving circuit; Many data conductor links to each other with this data conductor driving circuit; A plurality of pixel Control Components are arranged at these many pilots respectively and intersect in a plurality of pixel regions that defined with these many data conductor; It is characterized in that: this LCD matrix circuit comprises that also one shares circuit, should share circuit forms by a plurality of Control Components are continuous, these a plurality of Control Components comprise one source pole respectively, one grid, and one the drain electrode, wherein this grid links to each other with this control device, and this source electrode links to each other with this data conductor, and should drain electrode link to each other with the source electrode of this adjacent Control Component; When this LCD matrix circuit work, this control device provides an enable signal these a plurality of Control Component conductings of control earlier so that this many data conductor link to each other, then this pilot driving circuit provides a control signal to these many pilots, this data conductor driving circuit provides a data-signal that these a plurality of pixel electrodes are carried out precharge, these these a plurality of Control Components of control device control disconnect so that these many data conductor disconnect then, and then this data conductor driving circuit charges to required voltage by the corresponding data lead to this pixel electrode.
2. LCD matrix circuit as claimed in claim 1, it is characterized in that: these a plurality of pixel Control Components have one source pole respectively, a grid and a drain electrode, and this grid links to each other with pilot, and this source electrode links to each other with data conductor, and this drain electrode links to each other with this pixel electrode.
3. LCD matrix circuit as claimed in claim 1 is characterized in that: the source electrode of this Control Component links to each other with the drain electrode of this adjacent Control Component.
4. LCD, it comprises: one first substrate, a liquid crystal layer and one second substrate, this first substrate has a common electrode layer; This first substrate setting relatively of this second substrate, it comprises: many pilots, many data conductor, a plurality of pixel Control Component, a plurality of pixel electrode and control device, these a plurality of pixel Control Components are separately positioned on these a plurality of pilots and intersect in a plurality of pixel regions that defined with these many data conductor; It is characterized in that: this LCD comprises that also one shares circuit, it forms by a plurality of Control Components are continuous, these a plurality of Control Components comprise one source pole respectively, one grid, and one the drain electrode, wherein this grid links to each other with this control device, and this source electrode links to each other with this data conductor with this drain electrode, and should drain electrode link to each other with the source electrode of this adjacent Control Component; This LCD also comprises a pilot driving circuit that links to each other with these many pilots and a data conductor driving circuit that links to each other with these many data conductor; When this LCD work, this control device provides an enable signal these a plurality of Control Component conductings of control earlier so that this many data conductor link to each other, then this pilot driving circuit provides a control signal to these many pilots, this data conductor driving circuit provides a data-signal that these a plurality of pixel electrodes are carried out precharge, these these a plurality of Control Components of control device control disconnect so that these many data conductor disconnect then, and then this data conductor driving circuit charges to required voltage by the corresponding data lead to this pixel electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100743269A CN101303489B (en) | 2007-05-09 | 2007-05-09 | LCD device and matrix circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100743269A CN101303489B (en) | 2007-05-09 | 2007-05-09 | LCD device and matrix circuit thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101303489A CN101303489A (en) | 2008-11-12 |
| CN101303489B true CN101303489B (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007100743269A Expired - Fee Related CN101303489B (en) | 2007-05-09 | 2007-05-09 | LCD device and matrix circuit thereof |
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| CN (1) | CN101303489B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5028916A (en) * | 1984-09-28 | 1991-07-02 | Kabushiki Kaisha Toshiba | Active matrix display device |
| US5426447A (en) * | 1992-11-04 | 1995-06-20 | Yuen Foong Yu H.K. Co., Ltd. | Data driving circuit for LCD display |
| US6307681B1 (en) * | 1998-01-23 | 2001-10-23 | Seiko Epson Corporation | Electro-optical device, electronic equipment, and method of driving an electro-optical device |
| CN1372241A (en) * | 2001-02-26 | 2002-10-02 | 三星电子株式会社 | LCD and driving method thereof |
-
2007
- 2007-05-09 CN CN2007100743269A patent/CN101303489B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5028916A (en) * | 1984-09-28 | 1991-07-02 | Kabushiki Kaisha Toshiba | Active matrix display device |
| US5426447A (en) * | 1992-11-04 | 1995-06-20 | Yuen Foong Yu H.K. Co., Ltd. | Data driving circuit for LCD display |
| US6307681B1 (en) * | 1998-01-23 | 2001-10-23 | Seiko Epson Corporation | Electro-optical device, electronic equipment, and method of driving an electro-optical device |
| CN1372241A (en) * | 2001-02-26 | 2002-10-02 | 三星电子株式会社 | LCD and driving method thereof |
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| CN101303489A (en) | 2008-11-12 |
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Granted publication date: 20101110 Termination date: 20180509 |