JPH11288001A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To narrow the non-display regions by wiring patterns and to obtain a liquid panel of a narrow picture frame by using a semiconductor chip integrated with a common driver and a data driver and effectively utilizing a non- display region. SOLUTION: A one chip driver 11 is a circuit integrated with the ordinary common driver and data driver. The one chip driver is packaged on a first substrate formed with scanning electrodes or a second substrate formed with data electrodes. The second substrate formed with the data electrodes or the first substrate formed with the scanning electrodes facing each other are connected by a conductive seal. The long sides of the one chip driver 11 are arranged at the center of the data electrodes in parallel with the scanning electrodes. The scanning electrode wiring patterns 17a are so arranged as to hold the data electrode wiring patterns 17b at the center. The scanning electrode wiring patterns 17a are so arranged as to pass right under the one chip driver 11. The wiring patterns are confined within the region of half the product of the conventional wiring pitches and the number of the scanning lines.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a liquid crystal display device or the like in which a semiconductor chip is mounted on one substrate and a wiring pattern from the semiconductor chip is connected to scanning electrodes from left and right.

[0002]

2. Description of the Related Art In recent years, liquid crystal display devices are being replaced by CRTs in various devices as thin, lightweight and low power consumption devices. When a display screen is driven using a liquid crystal panel, a liquid crystal driving driver IC and the like are mounted on a glass substrate.
At this time, it is necessary to reduce a non-display area that cannot be displayed by an IC, wiring, or the like. This not only reduces the manufacturing cost of the glass substrate, but also has the effect of increasing the display area in the same housing. In particular, in a small liquid crystal panel such as a portable device, a liquid crystal driving driver IC occupies a large portion of a display area, and it is an important factor to reduce the size of the IC and reduce a useless non-display area.

FIGS. 2 and 3 show a conventional example. The liquid crystal display device shown in FIG.
And a data driver 22. In a liquid crystal panel, scanning electrodes and data electrodes are arranged in a matrix on a pair of glass substrates, and liquid crystal is injected between the glass substrates, and then sealed with a seal. The common driver 21 outputs a line selection signal to control the scanning electrodes. Data driver 22
Outputs a predetermined data signal corresponding to each pixel display, and controls data electrodes. In each case, the amount of transmitted light changes according to the effective value between the scanning electrode and the data electrode, and the display is lightened or darkened by passing through a polarizing plate placed in crossed Nicols.

In the case of FIG. 2, the actual display section 23 of the liquid crystal panel is used.
Are the horizontal outline of the second glass substrate on which the data electrode wiring pattern is formed, the portion excluding the seal portion 25 and the space portion 24, and the vertical outline of the first glass substrate on which the scanning electrode wiring pattern is formed. , Seal part 25 and space part 2
4 is an area surrounded by a portion excluding 4.

[0005] The seal portion 25 is provided with a sealant for sealing liquid crystal between the first substrate and the second substrate facing each other. Since the sealant is formed by dispersing conductive particles having conductivity in an adhesive having insulating properties, display unevenness or the like near the frame of the liquid crystal panel is likely to occur. Therefore, in order to improve reliability, a space portion 24 is provided between the pixel and the pixel.

Further, the first substrate is a common driver 21
Mounting portion area 26a, scan electrode wiring pattern area 28
a and the second substrate require a data driver mounting area 26b and a data electrode wiring pattern area 28b.

[0007] The liquid crystal display device shown in FIG. 3 includes a liquid crystal panel and a one-chip driver 31. The one-chip driver 31 can be easily realized by a circuit in which the common driver 21 and the data driver 22 of FIG. 2 are integrated. In a liquid crystal panel, scanning electrodes and data electrodes are arranged in a matrix on a pair of glass substrates, and liquid crystal is injected between the glass substrates, and then sealed with a seal. For example, one chip driver
When mounted on the first substrate on which the scanning electrodes are formed, the substrate is connected to the substrate on which the data electrodes are formed by a conductive seal. The one-chip driver 31 outputs a line selection signal to control the scanning electrodes. At the same time, a predetermined data signal corresponding to each pixel display is output to control the data electrodes. In each case, the amount of transmitted light changes according to the effective value between the scanning electrode and the data electrode, and the display is lightened or darkened by passing through a polarizing plate placed in crossed Nicols.

In the case of FIG. 3, the actual display section 33 of the liquid crystal panel is used.
Are obtained from the horizontal outer shape of the second glass substrate on which the data electrode wiring pattern is formed, the portion excluding the seal portion 32 and the space portion 38, and the vertical outer shape of the first glass substrate on which the scanning electrode wiring pattern is formed. , Seal part 32 and space part 3
This is an area surrounded by a portion excluding 8.

[0009] The seal portion 32 includes a sealant for sealing liquid crystal between the first and second substrates facing each other. Since the sealant is formed by dispersing conductive particles having conductivity in an adhesive having insulating properties, display unevenness or the like near the frame of the liquid crystal panel is likely to occur. Therefore, in order to improve the reliability, a space 38 is provided between the pixel and the pixel.

Further, in the first substrate, the scanning electrode wiring pattern region 34 (the left side of the panel in FIG. 3) is wider than the space portion 38, and the actual table portion 33 is reduced. The second substrate requires the one-chip driver IC mounting part 36 and the wiring pattern area (scanning side, data side).

[0011]

As shown in FIG. 2, when driving a liquid crystal panel with a two-chip configuration of a common driver and a data driver, the scanning electrode wiring pattern area 28a
Requires only the length of the product of the wiring pattern pitch and the number of scanning electrodes, and the data electrode wiring pattern region 28b requires the length of the product of the wiring pattern pitch and the number of data electrodes.

As shown in FIG. 3, when a liquid crystal panel is driven with a one-chip configuration of a common driver and a data driver, the scanning electrode wiring pattern area 34 needs to have a length equal to the product of the wiring pattern pitch and the number of scanning electrodes. In addition, the wiring pattern area (scanning side, data side) 35 requires the sum of the number of data electrodes and the number of scanning electrodes and the product of the wiring pattern pitch.

As the number of pixels increases, the area required for the wiring pattern also increases, and it is a major problem to realize a liquid crystal panel having a narrow frame on the scanning electrode side in the two-chip configuration and on the data electrode side in the one-chip configuration. .

[0014] An object of the present invention is to solve the above-mentioned problems, to reduce the non-display area by a wiring pattern by effectively using the non-display area by using an integrated semiconductor chip for a common driver and a data driver, An object of the present invention is to provide a liquid crystal panel having a narrow frame.

[0015]

In order to achieve the above-mentioned object, the liquid crystal display device of the present invention employs the following means.

A first substrate on which a plurality of scanning electrodes are formed on the surface and a second substrate on which a plurality of data electrodes are formed on the surface,
In a liquid crystal display panel having matrix-arranged pixels that face each other with a thin liquid crystal layer interposed therebetween and that drives the thin liquid crystal layer in a time-division manner, a driving circuit that supplies signals to the scanning electrodes and the data electrodes to control liquid crystal includes: Are configured in one semiconductor chip, output a signal for a scan electrode and a signal for a data electrode, and the semiconductor chip is mounted on the first or second substrate and connected to the scan electrode or the data electrode by a wiring pattern. The data electrode or scan electrode of the opposing second or first substrate is connected with a wiring pattern via a conductive seal, and the pattern to be wired to the liquid crystal panel has a data electrode wiring pattern arranged at the center. The scanning electrode wiring pattern is arranged on both sides of the data electrode wiring pattern.

A first substrate on which a plurality of scan electrodes are formed on the surface and a second substrate on which a plurality of data electrodes are formed on the surface,
In a liquid crystal display panel having matrix-arranged pixels that face each other with a thin liquid crystal layer interposed therebetween and that drives the thin liquid crystal layer in a time-division manner, a drive circuit that supplies a signal to the scan electrode and the data electrode to control liquid crystal. Is formed in one semiconductor chip, outputs a signal for a scan electrode and a signal for a data electrode, and the semiconductor chip is mounted on the first substrate, connected to the scan electrode by a wiring pattern, and faces the second And a data electrode of the substrate is connected by a conductive seal, and a wiring pattern for a scanning electrode to be wired to the liquid crystal panel is disposed immediately below the semiconductor chip.

(Operation) The present invention includes a scanning electrode formed on the first substrate, a data electrode formed on the second substrate, and one semiconductor chip.

One semiconductor chip is mounted on the first substrate, and the wiring pattern up to the scanning electrodes is arranged from both sides in the center of the semiconductor chip. Further, a wiring pattern is formed on the first substrate directly below the semiconductor chip.

It is possible to reduce the non-display portion of the liquid crystal panel due to the routing of the wiring pattern, which is caused by the increase in the number of pixels, that is, the increase in the number of scanning lines and the number of data lines. Further, the manufacturing cost can be reduced as the glass substrate is reduced.

[0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a portable telephone according to an embodiment of the present invention. FIG. 1 is a configuration diagram of a liquid crystal display device used in the present embodiment. It comprises a liquid crystal panel and a one-chip driver 11. One-chip driver 11
Can be easily realized by a circuit in which an ordinary common driver and a data driver are integrated. In a liquid crystal panel, scanning electrodes and data electrodes are arranged in a matrix on a pair of glass substrates, and liquid crystal is injected between the glass substrates, and then sealed with a seal. The one-chip driver is mounted on the first substrate on which the scanning electrodes are formed or on the second substrate on which the data electrodes are formed. The second substrate on which the opposing data electrodes are formed or the first substrate on which the scanning electrodes are formed are connected by a conductive seal. The one-chip driver 11 outputs a line selection signal and controls the scanning electrodes. At the same time, a predetermined data signal corresponding to each pixel display is output to control the data electrodes. In each case, the amount of transmitted light changes according to the effective value between the scanning electrode and the data electrode, and the display is lightened or darkened by passing through a polarizing plate placed in crossed Nicols.

As shown in FIG. 1, one-chip driver IC
The long side of 11 is parallel to the scanning electrode and arranged at the center of the data electrode. The scanning electrode wiring pattern 17a is arranged so as to sandwich the data electrode wiring pattern at the center.

The scanning electrode wiring pattern 17a is
It is arranged so as to pass right below the chip driver 11.

In a liquid crystal display device, as a wiring pattern,
Indium tin oxide (ITO), which is a transparent conductive film, is used. Note that the wiring pattern does not necessarily need to use a transparent conductive film, and a metal film or a stacked film of a transparent conductive film and a metal film may be used.

The seal portion 12 includes a sealant for sealing liquid crystal between the first and second substrates facing each other. Since the sealant is formed by dispersing conductive particles having conductivity in an adhesive having insulating properties, display unevenness or the like near the frame of the liquid crystal panel is likely to occur. Therefore, in order to improve reliability, a space portion 18 is provided between the pixel and the pixel.

[0026]

As is apparent from the above description, in the present invention, since the wiring patterns for the scanning electrodes are arranged on the left and right sides of the liquid crystal panel, the area of the conventional product of the wiring pitch and the number of scanning lines is １ ／. Fits in. The scanning electrode wiring pattern is
Since it exists in the space between the sealant and the pixel, there is no increase in the non-display area due to the wiring. Further, even if the method of dividing the scanning electrode side into halves is the upper and lower rows of the liquid crystal panel or even and odd rows, the drive circuit according to the present invention does not increase because of the line selection signal.

Further, on the substrate on which the one-chip driver is mounted, the area of the scanning and data electrode wiring patterns can be reduced by arranging the scanning electrode wiring patterns directly below the one-chip driver.

[Brief description of the drawings]

FIG. 1 is a diagram showing a liquid crystal display device used in an embodiment of the present invention.

FIG. 2 is a diagram showing a conventional liquid crystal display device.

FIG. 3 is a diagram showing a conventional liquid crystal display device.

[Explanation of symbols]

 11 1 chip driver 12 seal part 13 display part 14 wiring pattern area (for common) 15 wiring pattern area (for data and common) 16 IC mounting part 17a scanning electrode wiring pattern 17b data electrode wiring pattern 18 space part 21 common driver Reference Signs List 22 data driver 23 display unit 24 space unit 25 seal unit 26a mounting unit (common driver) 26b mounting unit (data driver) 27a scanning electrode wiring pattern 27b data electrode wiring pattern 28a wiring pattern area (for common) 28b wiring pattern area (For data) 31 1-chip driver 32 seal section 33 display section 34 wiring pattern area (for common) 35 wiring pattern area (for data and common) 36 IC mounting section 37a scanning electrode wiring pattern 37b data electrode Wiring pattern 38 space

Claims (2)

[Claims] A first substrate on which a plurality of scanning electrodes are formed on a surface thereof and a second substrate on which a plurality of data electrodes are formed on a surface facing each other with a thin liquid crystal layer interposed therebetween; In a liquid crystal display panel having a matrix-arranged pixel that is driven in a divided manner, a driving circuit that supplies a signal to the scan electrode and the data electrode to control liquid crystal is formed in one semiconductor chip,
A signal for a scan electrode and a signal for a data electrode are output, and the semiconductor chip is mounted on the first or second substrate, connected to a scan electrode or a data electrode by a wiring pattern, and opposed to the second or the first. The data electrode or the scanning electrode of the substrate is connected by a wiring pattern via a conductive seal, and the wiring pattern for the liquid crystal panel is such that the wiring pattern for the data electrode is disposed at the center, and the wiring pattern for the scanning electrode is the data electrode. A liquid crystal display device which is arranged on both sides of a wiring pattern. 2. A method according to claim 1, wherein a first substrate on which a plurality of scan electrodes are formed and a second substrate on which a plurality of data electrodes are formed are opposed to each other with a thin liquid crystal layer interposed therebetween. In a liquid crystal display panel having a matrix-arranged pixel to be driven in a divided manner, a driving circuit configured to supply a signal to the scan electrode and the data electrode to control liquid crystal is formed in one semiconductor chip,
A signal for a scan electrode and a signal for a data electrode are output, and the semiconductor chip is mounted on the first substrate, connected to the scan electrode by a wiring pattern, and is electrically conductively sealed with the data electrode of the second substrate facing the semiconductor chip. A liquid crystal display device, wherein a wiring pattern for a scanning electrode connected to the liquid crystal panel and connected to the liquid crystal panel is disposed directly below the semiconductor chip.