CN100346201C

CN100346201C - LCD Monitor

Info

Publication number: CN100346201C
Application number: CNB2004100825797A
Authority: CN
Inventors: 施鸿民; 蔡宗光
Original assignee: AU Optronics Corp
Current assignee: AUO Corp
Priority date: 2004-09-21
Filing date: 2004-09-21
Publication date: 2007-10-31
Anticipated expiration: 2024-09-21
Also published as: CN1588218A

Abstract

A liquid crystal display includes a liquid crystal display panel and a first gate driver. The liquid crystal display panel is provided with M scanning lines, wherein M is a positive integer, and each M scanning line is provided with a first end and a second end. The first gate driver is located at one side of the liquid crystal display panel and is used for driving M scanning lines. The first gate driver has P buffers, P being a positive integer greater than M. M buffers in the P buffers are electrically connected with the first ends of the M scanning lines one by one respectively, and the rest (P-M) buffers in the P buffers are electrically connected with the first ends of any one of the M scanning lines respectively.

Description

LCD

Technical field

The present invention relevant for a kind of LCD (Liquid Crystal Display, LCD), and particularly relevant for the LCD of the driving force of a kind of enhancement gate drivers (gate driver).

Background technology

Because LCD has the advantage of thin, the in light weight and low electromagnetic of volume, is subjected to consumers in general's favor in recent years gradually.

Please refer to Fig. 1, its represented traditional a kind of mode of using monolateral driving drives the circuit diagram of the sweep trace of display panels.LCD 10 comprises display panels 12 and gate drivers 15.Display panels 12 comprises sweep trace SL (1)～SL (m).Gate drivers 15 comprises impact damper A (1)～A (m).Impact damper A (1)～A (m) is electrically connected with first end SL (1) a～SL (m) a of sweep trace SL (1)～SL (m) respectively, in order to driven sweep line SL (1)～SL (m).

Yet, increase along with the display panels size, for example be increased to 37 inches or 46 inches, come the driven sweep line in the mode of traditional monolateral driving, can't guarantee that its driving force can drive the whole piece sweep trace really, for example have the problem generation of undercharge in second end SL (1) b～SL (m) b of sweep trace SL (1)～SL (m).Therefore, the mode that develops bilateral driving gradually drives the sweep trace of display panels, in the hope of the problem of the driving force deficiency that can thoroughly improve monolateral type of drive.

Please refer to Fig. 2, its represented traditional a kind of mode of using bilateral driving drives the circuit diagram of the sweep trace of display panels.LCD 20 comprises display panels 22, first grid driver 25 and second grid driver 27.Compare with the LCD 10 of Fig. 1, in LCD shown in Figure 2 20, the both sides of display panels 22 have first grid driver 25 and second grid driver 27 respectively.First grid driver 25 comprises impact damper A (1)～A (m), and second grid driver 27 comprises impact damper B (1)～B (m).Impact damper A (1)～A (m) and impact damper B (1)～B (m) is electrically connected to first end SL (1) a～SL (m) a and second end SL (1) b～SL (m) b of sweep trace SL (1)～SL (m) respectively, with while driven sweep line SL (1)～SL (m).

Yet, on the display panels size, see to 50 inches, even when 60 inches and even 70 inches, can drive sweep trace on the display panels smoothly in the mode of the bilateral driving of tradition, need very big pondering really.Therefore, how to research and develop a kind of type of drive, can drive the whole piece sweep trace effectively, with solution large scale liquid crystal display panel, even the driving problems of oversize display panels, must make great efforts improved direction for relevant practitioner in fact.

Summary of the invention

In view of this, purpose of the present invention is exactly that a kind of LCD of promoting the driving force of gate drivers is being provided, to solve the driving problems of large scale liquid crystal display panel and oversize display panels.

According to purpose of the present invention, a kind of LCD is proposed, comprise display panels and first grid driver.Display panels has M bar sweep trace, sweep trace (1)～sweep trace (M), and M is a positive integer, and each M bar sweep trace has one first end and one second end.The first grid driver is positioned at a side of display panels, has P impact damper, and in order to drive M bar sweep trace, wherein P is the positive integer greater than M.Wherein, first end of each sweep trace is electrically connected with two impact dampers at least.

According to another object of the present invention, a kind of LCD is proposed, comprise display panels and first grid driver.Display panels has M bar sweep trace, and M is a positive integer, and each M bar sweep trace has first end and second end.The first grid driver is positioned at a side of display panels, in order to drive M bar sweep trace.The first grid driver has P impact damper, and P is the positive integer greater than M.Wherein, M impact damper in P impact damper is electrically connected with first end of M bar sweep trace respectively one to one, and remaining (P-M) individual impact damper is electrically connected with first end of arbitrary sweep trace in the M bar sweep trace respectively in P impact damper.

For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail as follows.

Description of drawings

Fig. 1 represents that traditional a kind of mode of using monolateral driving drives the circuit diagram of the sweep trace of display panels.

Fig. 2 represents that traditional a kind of mode of using bilateral driving drives the circuit diagram of the sweep trace of display panels.

Fig. 3 represents a kind of circuit diagram that drives the sweep trace of display panels according to first embodiment of the invention.

Fig. 4 represents a kind of sequential synoptic diagram that drives 1 sweep trace with the impact damper of 2 parallel connections according to first embodiment of the invention.

Fig. 5 represents a kind of circuit diagram that drives the sweep trace of display panels according to second embodiment of the invention.

The figure grade explanation

10,20,30,50: LCD

12,22,32,52: display panels

15: gate drivers

25,35,55: the first grid driver

27,37,57: the second grid driver

Embodiment

Embodiment one

Please more simultaneously with reference to Fig. 1 and Fig. 2.Tradition utilizes m impact damper to drive m bar sweep trace in the mode of monolateral driven sweep line, that is, only utilize 1 impact damper to drive 1 sweep trace, as shown in Figure 1.Similarly, tradition also at the two ends of each sweep trace, utilizes 1 impact damper to drive respectively, as shown in Figure 2 in the mode of bilateral driven sweep line.Therefore, traditional type of drive is for the large scale liquid crystal display panel, easily because of the impact damper driving force deficiency of gate drivers, and causes the problem that can't drive the whole piece sweep trace smoothly.

Please refer to Fig. 3, its expression is according to a kind of circuit diagram that drives the sweep trace of display panels of first embodiment of the invention.LCD 30 comprises display panels 32 and first grid driver 35.For example, display panels 32 comprises 3 sweep traces, and it is respectively SL (1), SL (2) and SL (3).Sweep trace SL (1)～SL (3) has first end SL (1) a～SL (3) a and second end SL (1) b～SL (3) b respectively.First grid driver 35 is positioned at a side of display panels 32, and couples with first end SL (1) a～SL (3) a of the sweep trace first end SL (1)～SL (3), in order to driven sweep line SL (1)～SL (3).

First grid driver 35 has 6 impact dampers, and it is A (1)～A (6), and 6 output terminals, and it is OA (1)～OA (6).Impact damper A (1)～A (6) is electrically connected with output terminal OA (1)～OA (6) respectively, and impact damper A (1) and A (2), A (3) and A (4) and A (5) and A (6) are electrically connected on the display panels 32 with first end SL (1) a, SL (2) a and SL (3) a of corresponding scanning beam SL (1), SL (2) and SL (3) by output terminal OA (1) and OA (2), OA (3) and OA (4) and OA (5) and OA (6) and respectively.In Fig. 3, output terminal OA (1) and OA (2) are electrically connected on first end SL (1) a respectively, yet, the connected mode of output terminal OA (1) and OA (2) and first end SL (1) a is not as limit, for example, output terminal OA (1) also can then be electrically connected with first end SL (1) a prior to being electrically connected on the display panels 32 with OA (2) again.

As shown in the above description, impact damper A (1) and A (2) are electrically connected with first end SL (1) a of sweep trace SL (1), in order to driven sweep line SL (1).Impact damper A (3) and A (4) are electrically connected with first end SL (2) a of sweep trace SL (2), in order to driven sweep line SL (2).And impact damper A (5) and A (6) are electrically connected with first end SL (3) a of sweep trace SL (3), in order to driven sweep line SL (3).Compare with the mode of the monolateral driving of tradition, present embodiment drives 1 sweep trace by 2 impact dampers in parallel, therefore, can improve the driving force of first grid driver effectively.

LCD 30 also comprises second grid driver 37.Second grid driver 37 is positioned at the opposite side of display panels 32, in order to driven sweep line SL (1)～SL (3).Second grid driver 37 has 6 impact dampers, and it is B (1)～B (6), and 6 output terminals, and it is OB (1)～OB (6).Impact damper B (1)～B (6) is electrically connected with output terminal OB (1)～OB (6) respectively, and impact damper B (1) and B (2), B (3) and B (4) and B (5) and B (6) are electrically connected on the display panels 32 with second end SL (1) b, SL (2) b and SL (3) b of corresponding scanning beam SL (1), SL (2) and SL (3) by output terminal OB (1) and OB (2), OB (3) and OB (4) and OB (5) and OB (6) and respectively.

Thus, impact damper A (1), A (2) and impact damper B (1), B (2) can come driven sweep line SL (1) by first end SL (1) a and second end SL (1) b simultaneously.Impact damper A (3), A (4) and impact damper B (3), B (4) can come driven sweep line SL (2) by first end SL (2) a and second end SL (2) b simultaneously.And impact damper A (5), A (6) and impact damper B (5), B (6) can come driven sweep line SL (3) by first end SL (3) a and second end SL (3) b simultaneously.Compare with the mode of the bilateral driving of tradition, present embodiment drives 1 sweep trace by 4 impact dampers.Therefore, the circuit design mode of present embodiment makes gate drivers can have enough driving forces, drives the sweep trace of large scale liquid crystal display panel and oversize display panels.

Below will be, and sweep trace SL (1) and impact damper A (1) and A (2) be example in the mode of monolateral driving, illustrate that how present embodiment drives 1 sweep trace by the impact damper of 2 parallel connections.

Please be simultaneously with reference to Fig. 3 and Fig. 4.Fig. 4 represents a kind of sequential synoptic diagram that drives 1 sweep trace with the impact damper of 2 parallel connections according to first embodiment of the invention.When impact damper A (1) and A (2) desire driven sweep line SL (1), first grid driver 35 receives horizontal synchronization arteries and veins HSC earlier.Wherein, in time T 1, have 2 pulses, it is P1 and P2.Pulse P1 is in order to enabling impact damper A (1), so that impact damper A (1) can driven sweep line SL (1), pulse P2 is then in order to enable impact damper A (2), so that impact damper A (2) can driven sweep line SL (1).

Then, first grid driver 35 produces finishing clock pulse BL according to horizontal synchronization arteries and veins HSC, in order to controlling the opportunity that starts impact damper A (1) and A (2) jointly, and then make impact damper A (1) and A (2) driven sweep line SL (1) in time T 3 simultaneously with pulse P1 and P2.Wherein, when BL was low level, impact damper A (1) and A (2) were disabled, and when BL was high level, impact damper A (1) and A (2) were controlled by pulse P1 and P2.So, impact damper A (1) and A (2) can while driven sweep line SL (1).

Present embodiment is with 3 sweep traces, and first grid driver 35 has 6 impact dampers, and second grid driver 37 to have 6 impact dampers too be that example explains.But the number of sweep trace might not equal 3, and first grid driver 35 might not equate with the impact damper number of second grid driver 37, also not necessarily to equal 6, as long as in first grid driver 35 or second grid driver 37, impact damper more than 2 or 2 is arranged, be electrically connected to an end of 1 sweep trace on the display panels simultaneously, the driving force of first grid driver 35 or second grid driver 37 is improved.

In addition, in present embodiment, the two ends of sweep trace SL (1)～SL (3) are electrically connected with 2 impact dampers respectively.Yet the two ends of sweep trace SL (1)～SL (3) might not be electrically connected with the impact damper of same number.

Embodiment two

Please refer to Fig. 5, its expression is according to a kind of circuit diagram that drives the sweep trace of display panels of second embodiment of the invention.LCD 50 comprises display panels 52, first grid driver 55 and second grid driver 57.

First grid driver 55 has 6 impact dampers, and it is A (1)～A (6), and 3 output terminals, and it is OA (1)～OA (3).Output terminal OA (1)～OA (3) is electrically connected with first end SL (1) a～SL (3) a of sweep trace SL (1)～SL (3) respectively, and output terminal OA (1)～OA (3) is electrically connected to impact damper A (1) and A (2), A (3) and A (4) and A (5) and A (6) respectively.Wherein, impact damper A (1) and A (2), A (3) and A (4) and A (5) and A (6) for being electrically connected, then are electrically connected with output terminal OA (1)～OA (3) in first grid driver 35 again.That is to say that impact damper A (1) and A (2), A (3) and A (4) and A (5) and A (6) are by output terminal OA (1), OA (2) and OA (3) and be electrically connected with pairing first end SL (1) a, SL (2) a and SL (3) a.

Similarly, second grid driver 57 has similar circuit configuration with first grid driver 55.Wherein, output terminal OB (1)～OB (3) is electrically connected with second end SL (1) b～SL (3) b of sweep trace SL (1)～SL (3) respectively, and output terminal OB (1)～OB (3) is electrically connected to impact damper B (1) and B (2), B (3) and B (4) and B (5) and B (6) respectively.

Therefore, second embodiment drives 1 sweep trace by 4 impact dampers.So the circuit design mode of second embodiment also can be used in the LCD of large scale liquid crystal display panel and oversize display panels.

Second embodiment and the difference of the first embodiment maximum are that the output terminal number that first grid driver and second grid driver had is different, and impact damper is different with the connected mode of sweep trace.The LCD of first embodiment or second embodiment no matter can solve the driving problems of large scale liquid crystal display panel and oversize display panels.

The disclosed LCD of the above embodiment of the present invention, the driving force that can promote gate drivers is to solve the driving problems of large scale liquid crystal display panel and oversize display panels.

In sum; though the present invention with a preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from the spirit and scope of the present invention; can carry out various changes and modification, so protection scope of the present invention is as the criterion with the claim restricted portion that is proposed.

Claims

1. A liquid crystal display, comprising:

A liquid crystal display panel having M scanning lines, where M is a positive integer, and each of the M scanning lines has a first end and a second end; and

At least one first gate driver, located on one side of the liquid crystal display panel, has P buffers for driving the M scanning lines, where P is a positive integer greater than M;

Wherein, the first end of each of the M scan lines is electrically connected to at least two of the buffers.

2. The liquid crystal display as claimed in claim 1, wherein the first gate driver has P output terminals, the P buffers are respectively electrically connected to the P output terminals, and are respectively connected to the P output terminals through the P output terminals. The first end of the corresponding scan line is electrically connected;

Wherein, the first end of each of the M scanning lines is electrically connected to the corresponding buffer on the liquid crystal display panel.

3. The liquid crystal display as claimed in claim 1, wherein the first gate driver has M output terminals, and the M output terminals are respectively electrically connected to the first ends of the M scanning lines;

Wherein, the buffer corresponding to the first end of each scan line is electrically connected to the first gate driver, and then electrically connected to the first end of the scan line through the corresponding output end.

4. The liquid crystal display as claimed in claim 1, wherein the liquid crystal display further comprises a second gate driver, located on the other side of the liquid crystal display panel, for driving the M scanning lines;

Wherein, the second gate driver has a plurality of buffers, and the second ends of the M scanning lines are respectively electrically connected to at least one buffer of the second gate driver.

5. A liquid crystal display, comprising:

A first gate driver, located on one side of the liquid crystal display panel, used to drive the M scanning lines, the first gate driver has P buffers, and P is a positive integer greater than M;

Wherein, the M buffers in the P buffers are electrically connected to the first ends of the M scanning lines one-to-one, and the remaining (P-M) buffers in the P buffers are respectively connected to the M The first end of any one of the scan lines is electrically connected.

6. The liquid crystal display as claimed in claim 5, wherein the liquid crystal display further comprises a second gate driver, located on the other side of the liquid crystal display panel, for driving the M scanning lines;

Wherein, the second gate driver has M buffers, and the M buffers are electrically connected to the second ends of the M scanning lines one by one.

7. The liquid crystal display as claimed in claim 6, wherein the second gate driver further has K buffers, K is a positive integer, and the K buffers are respectively connected to any scan line in the M scan lines The second end is electrically connected.