JPH06265932A - Liquid crystal panel for projection projector - Google Patents

Abstract

PURPOSE:To apply a microlens to liquid crystal of high definition. CONSTITUTION:With respect to the liquid crystal panel for projection projector provided with a glass substrate 1a having plural picture element display areas partitioned by a black matrix 2 including display electrodes 4 for liquid crystal display and their leader lines 5 and a liquid crystal plate which is put on the glass substrate and has picture elements formed in parts corresponding to display electrodes 4, 2X2 picture element display areas 3 adjacent to one another in the longitudinal direction and the transverse direction are surrounded with the black matrix 2 apparently as one picture element display area, and thin film transistors TFT 6 to drive the display electrodes 4 are arranged at four corners of the black matrix 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal panel for a projection type projector, and more particularly to an active matrix type liquid crystal panel.

[0002]

2. Description of the Related Art FIG. 2 shows a glass substrate 1 applied to an active matrix type liquid crystal panel using a thin film transistor (TFT) as an active element.

According to this, a plurality of pixel display areas 3 partitioned by the black matrix 2 are formed on the glass substrate 1.
And a transparent display electrode 4 is provided on each of them. In this case, the black matrix 2 is provided in order to prevent the leakage and bleeding of light from the adjacent pixels and to make the contrast clear. However, the portion of the black matrix 2 is used to draw out the display electrode 4. The line 5 is wired.

Further, in each pixel display area 3, a thin film transistor 6 for driving the display electrode 4 is arranged at a corner of the pixel display area 3.

A liquid crystal panel (not shown) is formed by stacking a liquid crystal plate (not shown) on the glass substrate 1. By turning on and off the display electrode 4 via the thin film transistor 6, pixels are formed on the liquid crystal plate correspondingly. To be done.

[0006]

When this liquid crystal panel is applied to a projection type projector, a microlens is required in order to achieve high brightness. This micro lens is formed corresponding to each pixel of the liquid crystal,
If the lens diameter is smaller than 100 μm, it will be difficult to form.

On the other hand, in order to obtain a high-definition image such as a high-definition image, it is inevitable that the pixels must be made small, and there is a problem that the microlens cannot catch up technically.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and its structural feature is that a plurality of electrodes are divided by a black matrix including display electrodes for liquid crystal display and lead lines thereof. In a liquid crystal panel for a projection type projector, comprising: a glass substrate having a pixel display area, and a liquid crystal plate which is superposed on the glass substrate and forms a pixel in a portion facing the display electrode, in a vertical direction and a horizontal direction. Each adjacent 2 × 2 pixel display area is formed as a single apparent pixel display area, and the periphery thereof is surrounded by the black matrix, and thin film transistors (TFTs) for driving the display electrodes are arranged at four corners of the black matrix. Especially.

[0009]

According to this structure, one apparent pixel display region has approximately four times the aperture of the conventional one. Therefore, it is sufficient to form the microlens according to the size thereof, and the light rays are converged by the microlens and are incident on the liquid crystal plate, whereby a high-luminance image can be obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIG. Note that only the glass substrate 1a of this embodiment is shown in FIG.
The liquid crystal plate combined with is omitted in the figure. Also,
The same reference numerals as those used in FIG. 2 described above are used for the same portions.

According to this, a total of four 2 × 2 pixel display areas 3 adjacent to each other in the vertical and horizontal directions are collectively considered as one apparent pixel display area, and the periphery thereof is surrounded by the black matrix 2. To do.

Then, the thin film transistor 6 for driving the display electrode 4 of each pixel display region 3 is provided in the black matrix 2.
Place it in the four corners.

This structure can be rephrased as follows. That is, the pixel display areas 3 are grouped into a total of 4 in 2 × 2 which are adjacent to each other in the vertical direction and the horizontal direction, and the black matrix 2 is arranged in a cross shape so as to go through the center in the vertical and horizontal directions. The thin film transistors 6 in the display area 3 are arranged so as to be gathered in the center thereof.

Regardless of the difference in expression, in any case, an opening four times as large as that of the conventional case is formed. Therefore, even if one pixel itself is made small, the microlens can be made four times as large as that of the conventional one. Is easy. Further, since the amount of light incident on the liquid crystal plate increases, both high brightness and high definition are compatible.

[0015]

As described above, according to the present invention, a 2 × 2 pixel display area adjacent to each other in the vertical direction and the horizontal direction is regarded as one apparent pixel display area, and the periphery thereof is surrounded by a black matrix. In addition, by arranging thin film transistors (TFTs) for driving the display electrodes at the four corners of the same black matrix, relatively speaking,
Since the size of the pixel can be made to be approximately half the diameter of the microlens, the size of the high-definition liquid crystal panel can be reduced.

As a result, not only can the liquid crystal projector be made smaller, but the distance from the light source to the projection lens is shortened, and the microlens can be applied to high-definition pixels. Makes it possible to obtain a brighter image.

Further, even if the pixel is made small, it is easy to manufacture a microlens suitable for it, and the like.

[Brief description of drawings]

FIG. 1 is a plan view showing a part of a glass substrate according to an embodiment of the present invention.

FIG. 2 is a plan view showing a part of a glass substrate according to a conventional example.

[Explanation of symbols]

 1a Glass Substrate 2 Black Matrix 3 Pixel Display Area 4 Display Electrode 5 Leader Line 6 Thin Film Transistor

Claims (1)

[Claims] 1. A glass substrate having a plurality of pixel display regions partitioned by a black matrix including a display electrode for liquid crystal display and a lead line thereof, and a portion which is superposed on the glass substrate and faces the display electrode. In a liquid crystal panel for a projection type projector, comprising a liquid crystal plate for forming pixels in a vertical direction, a 2 × 2 pixel display area adjacent to each other in a vertical direction and a horizontal direction is formed as an apparent one pixel display area, and the periphery thereof is the black matrix. And a thin film transistor (TFT) which drives the display electrode and is arranged at four corners of the same black matrix.