JPH09230358A - Liquid crystal display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily apply a liquid crystal display panel to a projection type liquid crystal display device or a spectacle type liquid crystal display device despite of simple configuration. SOLUTION: This panel 1 has thin-film transistors(TFTs) which are turned on by the scanning signals from gate signal lines and pixel electrodes to which the pixel signals from the data signal lines are supplied via in this on-TFTs in the unit pixel areas on the liquid crystal side surface of one transparent substrate 2 among the transparent substrates 2 arranged to face each other. In such a case, the connecting terminals to the respective external circuits of the data signal lines are disposed in two pieces and the connecting terminals of the one side of the data signal lines are successively arranged according to one direction of the juxtaposition directions of the data signal lines. The connecting terminals of the other side are successively arranged according to the opposite direction of the juxtaposition directions of the data signal lines.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel, and more particularly to a liquid crystal display panel applicable not only to its normal use but also to a projection type liquid crystal display device or a spectacle type liquid crystal display device.

[0002]

2. Description of the Related Art In a so-called active matrix type liquid crystal display panel, a unit pixel region on the liquid crystal side of one of the transparent substrates arranged to face each other with a liquid crystal in between is scanned from a gate signal line. A thin film transistor turned on by a signal and a pixel electrode to which a pixel signal from a data signal line is supplied via the turned on thin film transistor are provided.

In this case, each unit pixel area is formed as an area surrounded by gate signal lines and data signal lines arranged in parallel with each other and arranged orthogonally to each other.

A scanning signal is sequentially supplied to each gate line,
By supplying the pixel information to each data line at the timing, the pixel signal is read into the pixel electrode of the pixel region corresponding to the gate line to which the scanning signal is supplied.

In this case, the pixel information is supplied in accordance with the position of the data line to which it is supplied, and is supplied from the external circuit side to each data line in accordance with the specification. .

However, such a liquid crystal display panel is not only used for normal use, but may be applied to, for example, a projection type liquid crystal display device or a spectacle type liquid crystal display device.

In such a case, due to the relationship of the optical system incorporated in the device, the left and right images are displayed in reverse, so it is necessary to provide the adjusting means.

Conventionally, a circuit for changing the pixel selection order is added to the liquid crystal display panel, a multiplexer or the like is incorporated in an external circuit, and the pixel information supplied to the data lines of the liquid crystal display panel is reversed in order. It was devised.

[0009]

However, it has been pointed out that the configuration becomes complicated when the multiplexer or the like is incorporated in the external circuit as described above.

The present invention has been made under such circumstances, and its object is to be easily applicable to a projection-type liquid crystal display device or a spectacle-type liquid crystal display device despite its simple structure. It is to apply a liquid crystal display panel.

[0011]

In order to achieve such an object, the present invention is basically based on a liquid crystal side surface of one of the transparent substrates arranged to face each other with a liquid crystal interposed therebetween. In a unit pixel region, in a liquid crystal display panel comprising a thin film transistor which is turned on by a scanning signal from a gate signal line and a pixel electrode to which pixel information is supplied from a data signal line through the turned on thin film transistor,
The data signal line is provided with two connection terminals to each external circuit, and one connection terminal of the data signal line is sequentially arranged in accordance with one of the juxtaposed directions of the data signal lines. In addition to being arranged, the other connection terminal is sequentially arranged according to the opposite direction of the juxtaposed directions of the data signal lines.

The liquid crystal display panel having the above structure is
The configuration is extremely simple, and by selecting one of the connection terminals and connecting it to an external circuit, it is possible to display a normal display or a left-right inverted display. Become.

For this reason, the latter type can be easily applied to a projection type liquid crystal display device or a spectacle type liquid crystal display device only by making a connection for displaying.

[0014]

1 is a schematic plan view showing an embodiment of a liquid crystal display panel according to the present invention.

In the liquid crystal display panel 1 shown in the figure, the semiconductor layer forming the thin film transistor formed in each of the pixel regions is made of a polycrystalline silicon layer (polysilicon layer), and the MIS is also made of a polycrystalline silicon layer.
The figure also shows the one in which a drive circuit composed of type transistors is also mounted.

In the figure, a display section 3 is formed on the liquid crystal side surface of one transparent substrate 2 of the transparent substrates arranged to face each other with a liquid crystal interposed therebetween, and the display sections are arranged in a matrix. It is composed of a plurality of unit pixel regions.

That is, although not shown, gate lines extending in the x direction and arranged in parallel in the y direction in the figure, and gate lines insulated in the gate line and extending in the y direction and arranged in parallel in the x direction. A region surrounded by the data line is a unit pixel region, and in each of these unit pixel regions, a thin film transistor which is turned on by a scanning signal from the gate signal line and pixel information from the data signal line is turned on via the turned on thin film transistor. And a pixel electrode to be supplied.

Here, the semiconductor layer of the thin film transistor is formed of polycrystalline silicon.

A scanning signal is sequentially supplied to each of the gate lines by a vertical scanning circuit 4 provided on the left side of the display section 3 in the drawing. The vertical scanning circuit 4 is composed of a plurality of complementary MIS type transistors, and the semiconductor layer of each of these transistors is made of polycrystalline silicon.

A signal is supplied to the vertical scanning circuit 4 from an external circuit board which is an external circuit of the liquid crystal display panel 1, and its connection terminal (not shown).
Are juxtaposed around the transparent substrate 2.

On the other hand, a pixel signal is supplied to each of the data lines by a video drive signal circuit 5 provided on the upper side of the display section 3 in the figure. Although not clearly shown, the video drive signal circuit 5 is composed of a plurality of complementary MIS type transistors, and the semiconductor layer of each of these transistors is formed of polycrystalline silicon.

A signal is supplied to the video drive signal circuit 5 from an external circuit board which is an external circuit of the liquid crystal display panel 1, and its connection terminals are arranged around the transparent substrate 2. It is set up.

In this case, in this embodiment, two connection terminals of the data signal line to each external circuit board are provided for one data signal line (actually, input terminal of the video drive signal circuit). Is formed.

Then, one connection terminal of each data signal line is sequentially arranged according to one direction (+ x direction in the drawing) of the juxtaposed directions of the data signal lines, and these are adjacent to each other. The connection terminal group 6 is formed.

The other connection terminal of each data signal line is sequentially arranged according to the opposite direction (-x direction in the drawing) of the parallel arrangement direction of the data signal lines, and these are adjacent to each other. To form the connection terminal group 7.

The other transparent substrate arranged via the liquid crystal is arranged so as to cover at least the display portion 4, and a group of connection terminals (not shown) serving as input terminals of the vertical scanning circuit 4 and the video signal. The connection terminal groups 6 and 7 serving as input terminals of the drive circuit 5 are exposed from the other transparent substrate.

Next, the usage of the liquid crystal display panel 1 thus constructed will be described below.

FIG. 2 is a diagram showing the connection with the external circuit board 8 when the liquid crystal display panel 1 is used in a normal use state (when the display portion is directly viewed).

In the figure, the output terminals from the external circuit board 8 are connected to the respective connection terminals of the connection terminal group 6 of the liquid crystal display panel 1.

Here, the external circuit board 8 has an interface function so that a video signal consisting of analog data can be adapted to the video drive of the liquid crystal display panel 1.

The video signal from the buffer 8A in the external circuit board 8 is sequentially output from the lower terminal to the upper terminal in the figure, and the output thereof is in each data signal line in the figure. Input is made from the left side to the right side.

Therefore, a normal display is made on the display unit 2 of the liquid crystal display panel 1, and the observer can observe the image as it is.

FIG. 3 is a diagram showing the connection with the external circuit board 8 when the liquid crystal display panel 1 is used in a usage state applied to, for example, a projection type liquid crystal display device.

In the figure, the output terminals from the external circuit board 8 are connected to the respective connection terminals of the connection terminal group 7 of the liquid crystal display panel 1.

The video signal from the buffer 8A in the external circuit board 8 is designed to be sequentially output from the lower terminal to the upper terminal in the figure as in the case of FIG. Data signals are input from the right side to the left side in the figure.

Therefore, if the liquid crystal display panel has a circuit for changing the pixel selection order, the display unit 2 of the liquid crystal display panel 1 will be described.
The left and right are displayed in comparison with the case of FIG. 2, and the left and right are further inverted through the optical system incorporated in the projection type liquid crystal display device, and the observed image is observed. The person can observe the image as it is.

The liquid crystal display panel 1 configured as described above
Has a very simple structure, and each connection terminal group 6, 7
By selecting any one of them and connecting it to an external circuit, it is possible to display a normal display or a left-right inverted display.

Therefore, the latter type can be easily applied to the projection type liquid crystal display device only by making a connection for displaying.

In the above-described embodiment, the connection terminal group on one side of the liquid crystal display panel is connected to the external circuit board, but the present invention is not limited to this, and the liquid crystal display panel is not limited to this. The connection terminal groups on both sides of the liquid crystal display panel may be connected to an external circuit board, and one of the connection terminal groups of the liquid crystal display panel may be selected by a changeover switch provided on the external circuit board side. It goes without saying that it is good.

In the above-described embodiment, the case where the connection terminal group 7 of the liquid crystal display substrate 2 is connected to the external circuit board 8 is applied to the projection type liquid crystal display device. It is not limited to this,
Needless to say, the present invention can be applied to a spectacles type liquid crystal display device such as a head mount.

Further, in the above-mentioned embodiments, the thin film transistor has been described for the liquid crystal display panel whose semiconductor layer is a polycrystalline silicon layer, but it goes without saying that the invention is not limited to this.

[0042]

As is apparent from the above description,
According to the liquid crystal display panel of the present invention, it can be easily applied to a projection type liquid crystal display device or a spectacle type liquid crystal display device although the structure is simple.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an embodiment of a liquid crystal display panel according to the present invention.

FIG. 2 is an explanatory view showing a state in which the liquid crystal display panel according to the present invention is connected to an external circuit board.

FIG. 3 is an explanatory view showing another mode of connecting the liquid crystal display panel according to the present invention to an external circuit board.

[Explanation of symbols]

1 ... Liquid crystal display panel, 5 ... Video signal drive circuit, 6,
7: Connection terminal group, 8: External circuit board.

Claims (2)

[Claims] 1. A thin film transistor which is turned on by a scanning signal from a gate signal line in a unit pixel region on a liquid crystal side surface of one transparent substrate among transparent substrates arranged to face each other with a liquid crystal interposed therebetween, and the thin film transistor which is turned on. A liquid crystal display panel comprising a pixel electrode to which a pixel signal is supplied from a data signal line via a thin film transistor, wherein the data signal line is provided with two connection terminals to each external circuit, and the data signal line The connection terminals on one side are sequentially arranged according to one of the arranging directions of the data signal lines, and the connection terminals on the other side are arranged in the arranging direction of the data signal lines. A liquid crystal display panel, which is sequentially arranged in the opposite direction. 2. A liquid crystal display device having a liquid crystal display panel according to claim 1, wherein the connection between the external circuit and each data line is connected to a connection terminal on either side.