CN1170264C

CN1170264C - Transistor array circuit for LCD

Info

Publication number: CN1170264C
Application number: CNB011225130A
Authority: CN
Inventors: 林圣贤; 施博盛
Original assignee: Hannstar Display Corp
Current assignee: Hannstar Display Corp
Priority date: 2001-07-02
Filing date: 2001-07-02
Publication date: 2004-10-06
Anticipated expiration: 2021-07-02
Also published as: CN1393844A

Abstract

The present invention relates to a transistor array circuit of a liquid crystal display, which comprises at least one column of pixels, a first connecting part and a second connecting part, wherein each pixel is provided with a transistor, a pixel electrode and a common electrode, the pixel electrode is electrically connected with a drain electrode of the transistor, and a capacitor is formed between the pixel electrode and the common electrode; the first connecting part and the second connecting part are respectively across both sides of the array of the pixels; the common electrodes of every two adjacent pixels in the column of the pixels are respectively connected to the first connecting part and the second connecting part.

Description

The transistor array circuit of LCD

Technical field

The present invention relates to a kind of transistor array circuit of LCD, particularly a kind of transistor array circuit that two kinds of public electrode current potential driving methods must be provided that is applicable to.

Background technology

Fig. 1 has shown the planimetric map of the employed integrated circuit structure of conventional liquid crystal.Be example with four pixels among Fig. 1, signal line 102 is electrically connected by the interlayer hole (not shown) with this grid that is listed as transistor 101 in all pixels across a row pixel.103 on source signal line vertically on one-row pixels and with all pixels of this row in the source electrode of transistor 101 be electrically connected by interlayer hole.Pixel electrode 201 has an a junction 2011 and an extension 2012 that is connected with connecting portion 2011, and is electrically connected by interlayer hole with the drain electrode of transistor 101.Public electrode 104 also has an a junction 1041 and an extension 1042 that is connected with connecting portion 1041, and the public electrode 104 of each pixel all links together by connecting portion 1041.Transistor 101 all is positioned at the same side.The extension 2012 of pixel electrode 201 and public electrode 104 and 1042 formation one electric capacity.

Fig. 2 has shown the equivalent circuit diagram of above-mentioned conventional liquid crystal.Assembly identical with Fig. 1 among Fig. 2 uses identical symbol.Comprise a plurality of transistors 101 that are arranged in delegation's column matrix, connect the signal line 102 of same rowed transistor grid, the drain electrode of source signal line 103, public electrode 104 and each transistor 101 that connects same row transistor source electrode and the electric capacity 105 of 104 formation of public electrode.

Yet, when stating traditional integrated circuit structure in the use,, make that the current potential of public electrode 104 of all pixels is all identical because the public electrode 104 of all pixels links together by a junction 1041.Therefore, traditional circuit structure only can provide the public electrode of a kind of current potential to all pixels simultaneously, under the situation of not revising integrated circuit structure, can't provide two kinds of different public electrode current potentials to relative pixel simultaneously, so this traditional integrated circuit structure is not suitable for the driving method that two kinds of public electrode current potentials must be provided fully.

Summary of the invention

Therefore, in order to address the above problem, the invention provides a kind of transistor array circuit that two kinds of public electrode current potential driving methods must be provided that is applicable to.

One of purpose of the present invention is to provide a kind of transistor array circuit of LCD, comprises at least one row pixel and first, second connecting portion.Wherein, each pixel have a transistor, a pixel electrode that is electrically connected with this transistor drain and one and this pixel electrode between form the public electrode of an electric capacity.First and second connecting portions are then respectively across the both sides of this row pixel and isolation insulated from each other, and the public electrode of per two neighbors is connected to first and second connecting portion in this row pixel.

Another object of the present invention is to provide a kind of transistor array circuit of LCD, comprise at least one row pixel and first, second connecting portion.Wherein, each pixel have a transistor, a pixel electrode that is electrically connected with this transistor drain and one and this pixel electrode between form the public electrode of an electric capacity.First and second connecting portion is then respectively across the both sides of this row pixel, and the public electrode of per two neighbors is connected to first and second connecting portions respectively in this row pixel, and in each pixel, this transistor is positioned at a side of the junction of this public electrode and these connecting portions.

Below, illustrate the embodiment of the transistor array circuit of a kind of LCD of the present invention.

Description of drawings

Fig. 1 has shown the planimetric map of the employed integrated circuit structure of conventional liquid crystal;

Fig. 2 has shown the equivalent circuit diagram of a conventional liquid crystal;

Fig. 3 has shown according to the present invention the planimetric map of the employed integrated circuit structure of LCD of one first embodiment;

Fig. 4 has shown according to the present invention the equivalent circuit diagram of the LCD of one first embodiment;

Fig. 5 has shown according to the present invention the planimetric map of the employed integrated circuit structure of LCD of one second embodiment;

Fig. 6 has shown according to the present invention the equivalent circuit diagram of the LCD of one second embodiment.

Symbol description

101,501,601～transistor;

102,502,602～signal line;

103,503,603～source signal line;

104,504a, 504b, 604a, 604b～public electrode;

105,505,605～electric capacity;

201,507,607～pixel electrode.

Embodiment

Fig. 3 has shown the integrated circuit structure planimetric map of the LCD of first embodiment of the invention.Fig. 3 is an example with four pixels.Article two, the signal line 502 that is electrically connected mutually is across the both sides of a row pixel respectively and is connected by the interlayer hole (not shown) with this grid that is listed as transistor 501 in all pixels.503 on source signal line vertically through the top of one-row pixels and with all pixels of this row in the source electrode of transistor 501 be electrically connected by interlayer hole.Pixel electrode 507 has an a junction 5071 and an extension 5072 that is connected with connecting portion 5071, and is electrically connected by interlayer hole with the drain electrode of transistor 501.Two public electrode 504a, the 504b that insulate mutually also have a

junction

5041a, 5041b and extension 5042a, a 5042b who is connected with connecting

portion

5041a, 5041b respectively, and public electrode 504a, the 504b of each pixel link together by connecting portion 5041a, 5042b respectively.Transistor 501 is positioned at extension 5042a, the 5042b and the side that its connecting

portion

5041a, 5041b are connected of

public electrode

504a, 504b, and makes the transistor 501 of per two neighbors lay respectively at relative both sides.Extension 5042a, the 5042b of pixel electrode 507 and

public electrode

504a, 504b and 5071 formation one electric capacity.

Fig. 4 has shown the equivalent circuit diagram of the LCD of above-mentioned first embodiment.Assembly identical with Fig. 3 among Fig. 4 uses identical symbol.Wherein, comprise a plurality of electric capacity 505 that form between source signal line 503, first and second

public electrode

504a, 504b and each transistor 501 and public electrode 504a, the 504b of the transistor 501 of delegation's column matrix, the signal line 502 that connects same rowed transistor grid, the same row transistor source electrode of connection that are arranged in.Wherein,

public electrode

504a and 504b are respectively with respect to two adjacent transistors 501 in the row and interlaced being spaced.

Fig. 5 has shown the integrated circuit structure planimetric map of the LCD of second embodiment of the invention.Fig. 5 is an example with four pixels.One signal line 602 be across between the two row pixels and in the adjacent two row pixels with this grid near the transistor 601 of signal line 602 1 sides be electrically connected, this electrical connection is reached by the interlayer hole (not shown).603 on source signal line vertically on one-row pixels and with all pixels of this row in the source electrode of transistor 601 be electrically connected by interlayer hole.Pixel electrode 607 has an a junction 6071 and an extension 6072 that is connected with connecting portion 6071, and is electrically connected by interlayer hole with the drain electrode of transistor 601.Public electrode 604a, the 604b of two mutual insulatings also has a junction 6041a, 6041b and extension 6042a, a 6042b who is connected with connecting portion 6041a, 6041b respectively, and public electrode 604a, the 604b of each pixel link together by connecting portion 6041a, 6042b respectively.Transistor 601 is positioned at extension 6042a, the 6042b and the side that its connecting portion 6041a, 6041b are connected of

public electrode

604a, 604b, and makes the transistor 601 of per two neighbors lay respectively at relative both sides.Extension 6042a, the 6042b of pixel electrode 607 and

public electrode

604a, 604b and 6071 formation one electric capacity.

Fig. 6 has shown the equivalent circuit diagram of the LCD of above-mentioned second embodiment.Assembly identical with Fig. 5 among Fig. 6 uses identical symbol.Wherein, comprise a plurality of transistors 601 that are arranged in delegation's column matrix, between two rowed transistors and connect at interval adjacent two rowed transistors, 601 grids signal lines 602, connect the electric capacity 605 that forms between source signal line 603, first and second

public electrode

604a, 604b and each transistor 601 and public electrode 604a, the 604b of same row transistor source electrode.Wherein,

public electrode

604a and 604b are respectively with respect to two adjacent transistors 601 in the row and interlaced being spaced.

In a second embodiment, because the transistor 601 in the row pixel is cross-linked to two different signal lines 602, the scan mode of its pixel will be different with traditional scan mode, but still be revised by those skilled in the art easily and reach.

In addition, the public electrode that fundamental purpose of the present invention is to provide two insulation to isolate, the position of its transistor on integrated circuit structure still can keep with traditional structure in identical, promptly be positioned at the same side, but this kind arrangement mode will cause lower aperture opening ratio.

In sum, the present invention is by providing a kind of new construction of public electrode on integrated circuit, and the public electrode mutually insulated of neighbor is isolated, and then can make neighbor can have different public electrode current potentials, and be applicable to the driving method that two kinds of public electrode current potentials must be provided simultaneously.

Though the present invention describes as above by preferred embodiment; but it is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; all can make amendment and retouch, so protection scope of the present invention be as the criterion with appended claim it.

Claims

1. the transistor array circuit of a LCD comprises:

One substrate, definition has at least one row pixel, and each pixel comprises:

One transistor;

One pixel electrode, it is electrically connected with this transistor drain;

Form an electric capacity between one public electrode, it and this pixel electrode; And

One first and second connecting portion, respectively across the both sides of this row pixel and isolation insulated from each other, and the public electrode of per two neighbors is connected to this first and second connecting portion respectively in this row pixel.

2. according to the circuit of claim 1, wherein, comprise a signal line, it is electrically connected to the transistor gate of each pixel.

3. according to the circuit of claim 2, wherein, this signal line is electrically connected by the transistorized grid of interlayer hole and this.

4. according to the circuit of claim 1, wherein, comprise many source signal lines, they are electrically connected to the transistor source of each pixel respectively.

5. according to the circuit of claim 4, wherein, this source signal line is electrically connected by the transistorized source electrode of interlayer hole and this.

6. according to the circuit of claim 1, wherein, this pixel electrode is electrically connected with this transistor drain by interlayer hole.

7. according to the circuit of claim 1, wherein, in each pixel, this transistor is positioned at a side of the junction of this public electrode and these connecting portions.

8. according to the circuit of claim 7, wherein, comprise at least one signal line.

9. circuit according to Claim 8 wherein, comprises one first and second signal line, is across the both sides of this row pixel and is electrically connected to the transistor gate of these row pixel both sides respectively.

10. circuit according to Claim 8, wherein, this substrate definition has one first and second row pixel, this signal line to be across between this first and second row pixel and is electrically connected to these and is positioned at transistor gate near this signal line one side.