CN1971697A - LCD source electrode driver to improve protecting function of static discharge - Google Patents
LCD source electrode driver to improve protecting function of static discharge Download PDFInfo
- Publication number
- CN1971697A CN1971697A CN 200510123470 CN200510123470A CN1971697A CN 1971697 A CN1971697 A CN 1971697A CN 200510123470 CN200510123470 CN 200510123470 CN 200510123470 A CN200510123470 A CN 200510123470A CN 1971697 A CN1971697 A CN 1971697A
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- source electrode
- electrode driver
- lcd source
- power
- lcd
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Abstract
A LCD source electrode driver which improves protection function of static discharge includes a element area, at least one power to power protective circuit and several output underlays, at least one channel is prepared in the element area, at least one of said several output underlays is permitted to pass the said channel and connected with the power to power protective circuit to shorten the length of power cord and ground wire.
Description
Technical field
The present invention relates to the source electrode driver of a kind of LCD (LCD), particularly relate to a kind of source electrode driver that improves electrostatic discharge protection.
Background technology
In integrated circuit; in order to improve electrostatic discharge (ESD) protection (ESD Protection) function safeguard procedures; except adding the holding circuit, can add also that between power supply and ground connection power supply is to power protecting circuit (Power-rail ESD Clamp Circuit) at I/o pad (I/O Pad).In general; in order to obtain preferable ESD (Electro-Static discharge) protection effect; described power supply must add one group to power protecting circuit every a segment distance, and the line length of its power lead and ground wire is short more, live width is wide more, and resulting esd protection effect is just good more.
Yet; as shown in Figure 1; the source electrode driver 10 of LCD be shaped as rectangle; and because output channel (Output Channel) is numerous; therefore having a long limit usually all is output pad (OutputPad) 14; thereby cause described long limit not have the space arrangement power supply to power protecting circuit 16; make the power lead of output pad 14 and ground wire 18 must extend to along the periphery of element area 12 on the broadside power supply to power protecting circuit 15 in addition will around to the power supply on another long limit to power protecting circuit 16; source electrode driver 10 shown in Figure 1 only is a synoptic diagram; the length breadth ratio of real source electrode driver 10 was much larger than 10: 1; common is 13～17: 1; be with the power lead of the output pad 14 of center section and the length that ground wire 18 becomes suitable, cause the ESD effect undesirable.To address this problem the width that is not to widen power lead and ground wire 18 in the past; add the area of large power supply exactly to power protecting circuit 16; but these modes all can increase the chip area of source electrode driver 10; moreover; the trend of LCD source electrode driver 10 is towards high pin number (High pin count) development, and along with the increase of output channel, the shape of source electrode driver 10 is also got over prolate; if according to the traditional approach design, will make its esd protection effect worse and worse again.
Therefore, a kind of LCD source electrode driver that can improve esd protection usefulness and not increase chip area, be expect.
Summary of the invention
Purpose of the present invention is a kind of LCD source electrode driver that improves electrostatic discharge protection, and it can improve ESD usefulness and not increase chip area.
According to the present invention; a kind of LCD source electrode driver that improves electrostatic discharge protection comprises that an element zone, at least one power supply are to power protecting circuit and a plurality of output pad; reserve at least one passage on the described element area, described a plurality of output pads have at least one to connect described at least one power supply to power protecting circuit through described at least one passage.
On a wherein long limit of described LCD source electrode driver, and described output pad is on another long limit to power protecting circuit for described power supply.
On a wherein broadside of described LCD source electrode driver, and described output pad is on a wherein long limit of described LCD source electrode driver to power protecting circuit for described power supply.
Described at least one channel vertical ground connects two long limits of described LCD source electrode driver.
Described at least one passage connects two long limits of described LCD source electrode driver obliquely.
Described at least one passage connects wherein a long limit and wherein a broadside of described LCD source electrode driver.
Described at least one passage is a rectilinear form.
Described at least one passage is a curved shape.
Described electrical connection comprises power lead and ground wire.
In the present invention; because the power lead of output pad and ground wire pass element area and are connected to described at least one power supply to power protecting circuit; but not along element area around a great circle, so shorten the length of power lead and ground wire widely, improve the ESD usefulness of described source electrode driver.
Description of drawings
Fig. 1 is existing LCD source electrode driver;
Fig. 2 is the first embodiment of the present invention;
Fig. 3 is the second embodiment of the present invention;
Fig. 4 is the third embodiment of the present invention.
The main element symbol description:
10 source electrode drivers, 12 element areas
14 output pads, 16 power supplys are to power protecting circuit
18 power leads and ground wire 20 source electrode drivers
22 element areas, 24 passages
26 output pad 27 power leads and ground wires
28 power supplys are to power protecting circuit
Embodiment
Fig. 2 is the first embodiment of the present invention; in source electrode driver 20; element area 22 leaves passage 24, and near the power lead of the output pad 26 in the middle of the long limit, source electrode driver 20 belows and ground wire 27 can be connected to power supply on the long limit, top to power protecting circuit 28 through passage 24.Source electrode driver 20 shown in Figure 2 is a simple synoptic diagram; its length breadth ratio is not drawn according to normal ratio; in fact; the length breadth ratio of source electrode driver 20 was much larger than 10: 1; common is 13～17: 1; therefore; near middle output pad 26 can shorten power lead and ground wire 27 via power supply that the passage 24 of element area 22 is connected on another long limit significantly to power protecting circuit 28; therefore need not to increase the live width of power lead and ground wire 27 or add the area of large power supply, just can reach the effect that promotes esd protection power protecting circuit 28.In other words; when source electrode driver of the present invention 20 and traditional source electrode driver 10 have equal area; the esd protection ability of source electrode driver 20 of the present invention is preferable; when the esd protection ability of source electrode driver 20 and source electrode driver 10 was identical, source electrode driver 20 of the present invention had less area.
Fig. 3 is the second embodiment of the present invention, and its source electrode driver 20 comprises: element area 22, passage 24, output pad 26, power lead and ground wire 27 and power supply are to power protecting circuit 28.In this embodiment, two passages 24 vertically do not connect the long limit of source electrode driver 20, and wherein a passage 24 connects two long limits obliquely, and another then connects a long limit and a broadside.
Fig. 4 is the third embodiment of the present invention, and its source electrode driver 20 comprises: element area 22, passage 24, output pad 26, power lead and ground wire 27 and power supply are to power protecting circuit 28.In this embodiment, two passages 24 are not to connect point-blank to pass element region 22, but present bending.
In other embodiments, no matter the passage 24 on the element area 22 is more than one or two,, be connected to another long limit or broadside so long as pass element area 22, all in category of the present invention no matter also its shape why.
Claims (9)
1. a LCD source electrode driver that improves electrostatic discharge protection is characterized in that, comprising:
One output pad;
One power supply is to power protecting circuit; And
At least one passage is reserved in one element zone on it, for described output pad and power supply power protecting circuit is electrically connected.
2. LCD source electrode driver according to claim 1 is characterized in that: on a wherein long limit of described LCD source electrode driver, and described output pad is on another long limit to power protecting circuit for described power supply.
3. LCD source electrode driver according to claim 1 is characterized in that: on a wherein broadside of described LCD source electrode driver, and described output pad is on a wherein long limit of described LCD source electrode driver to power protecting circuit for described power supply.
4. LCD source electrode driver according to claim 1 is characterized in that: described at least one channel vertical ground connects two long limits of described LCD source electrode driver.
5. LCD source electrode driver according to claim 1 is characterized in that: described at least one passage connects two long limits of described LCD source electrode driver obliquely.
6. LCD source electrode driver according to claim 1 is characterized in that: described at least one passage connects wherein a long limit and wherein a broadside of described LCD source electrode driver.
7. LCD source electrode driver according to claim 1 is characterized in that: described at least one passage is a rectilinear form.
8. LCD source electrode driver according to claim 1 is characterized in that: described at least one passage is a curved shape.
9. LCD source electrode driver according to claim 1 is characterized in that: described electrical connection comprises power lead and ground wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101234708A CN100489951C (en) | 2005-11-21 | 2005-11-21 | LCD source electrode driver for improving protecting function of static discharge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101234708A CN100489951C (en) | 2005-11-21 | 2005-11-21 | LCD source electrode driver for improving protecting function of static discharge |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1971697A true CN1971697A (en) | 2007-05-30 |
| CN100489951C CN100489951C (en) | 2009-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101234708A Expired - Fee Related CN100489951C (en) | 2005-11-21 | 2005-11-21 | LCD source electrode driver for improving protecting function of static discharge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100489951C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777836A (en) * | 2012-08-20 | 2012-11-14 | 青岛海信电器股份有限公司 | Backlight module and liquid crystal display device |
-
2005
- 2005-11-21 CN CNB2005101234708A patent/CN100489951C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777836A (en) * | 2012-08-20 | 2012-11-14 | 青岛海信电器股份有限公司 | Backlight module and liquid crystal display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100489951C (en) | 2009-05-20 |
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Granted publication date: 20090520 Termination date: 20091221 |