JPH06324317A - Display device - Google Patents

Abstract

PURPOSE:To easily and accurately execute the positioning of a display panel and optical parts as for a display device provided with the optical parts on the front side of the display panel. CONSTITUTION:A linear positioning mark 13 is provided in an area outside the display area 12 of the display panel 11. Besides, a lenticular lens 15 for positioning facing the mark 13 when it is correctly positioned with respect to the panel 11 is provided on the optical parts for reading a displayed picture 14 disposed in front of the panel 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to accurately and easily align a display panel and an optical component in a display device having an optical component on the front surface of the display panel, particularly in a display device in which a stereoscopic image can be seen. For configuration.

In recent years, LCD (Liquid Crystal Display), CRT (Catho
De Ray Tubes), PDPs (Plasma Display Panels) and other display panels have been combined with optical components such as lenticular lens plates, and for example, display devices have become available in which stereoscopic images can be viewed.

[0003]

2. Description of the Related Art FIG. 6 is an explanatory view of a configuration example of a conventional device using a lenticular lens plate, and FIG. 7 is an explanatory view of problems when the lens plate is tilted.

In FIG. 6, in order to show different images for the right eye and the left eye to give a stereoscopic effect, the vertical display columns of the right eye pixels R and the left eye pixels L are alternately arranged on the flat display panel 1. On the front surface of the panel 1, a lenticular lens plate 2 in which a large number of lenticular lenses 2'having a semicylindrical cross section are aligned in the left-right direction is provided.

Therefore, when the display panel 1 is driven (image displayed) by a drive circuit (not shown) to alternately display the image for the right eye of the pixel R and the image for the left eye of the pixel L, image observation in front of the lens plate 2 is performed. In the area 3, the right-eye image is formed in the right-eye area RR and the left-eye image is formed in the left-eye area LL.

Therefore, the right eye is in the region RR and the left eye is in the region L.
By setting it to L, the observer can see the two-dimensional image displayed on the display panel 1 as a three-dimensional image. In such a device, when the lens 2'is divided into left and right with respect to the center axis in the longitudinal direction, the pixel L corresponds to the right side of the lens 2'and the pixel R corresponds to the left side thereof. It is necessary to arrange the central axes in the vertical direction of the panel 1 correctly.

However, when the lens 2'is tilted with respect to the panel 1 as shown in FIG. 7, for example, a normal image is observed in the area B above and below the central area A in the length direction of the lens 2 '. On the other hand, in the area A, the pixel R corresponds to the right side and the pixel L corresponds to the left side, and the left and right of the image are reversed.

Therefore, in order to accurately align the panel 1 and the lens plate 2, conventionally, alignment marks are formed outside the display areas of both the panel 1 and the lens plate 2 by printing or the like, and are viewed with a loupe or a microscope. The marks were matched.

[0009]

As described above,
Providing alignment marks on the panel 1 and the lens plate 2,
The conventional alignment work using a microscope is complicated and inefficient, which easily causes human error,
There was a problem of lack of reliability and stability.

[0010]

FIG. 1 shows the basic configuration of the present invention and its explanatory view. The basic configuration of the device of the present invention is shown in FIG.
At least one linear alignment mark 13 is provided on the outside of the display area 12 of the display panel 11 as shown in (a), and the lenticular lens plate (optical component) is provided as shown in FIG. 1 (b).
The 14 is provided with a lenticular lens 15 for alignment that faces the mark 13 when the display panel 11 and the lens plate 14 are accurately aligned.

Therefore, when the lens plate 14 is placed on the panel 11 and the mark 13 is observed through the lens 15, for example, as shown in FIG.
When the lens plate 14 is inclined with respect to the panel 11 as shown in (c), only a part of the mark 13 can be observed through the lens 15 while the lens plate 14 is accurately attached to the panel 11 as shown in FIG. When they are overlapped, that is, the mark 13 and the lens 15 are accurately overlapped with each other, the entire image of the mark 13 enlarged in the width direction by passing through the lens 15 can be observed.

[0012]

According to the above means, the alignment mark 13 is enlarged in the width direction over the entire length by the alignment lenticular lens 15, and the alignment can be easily and highly accurately performed without using a magnifying glass or a microscope. Like

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is an explanatory view of the main constitution of an embodiment device of the present invention, FIG. 3 is an explanatory view of the main constitution of another embodiment device of the present invention, and FIG. 4 is a rear projection type display device of the present invention. FIG. 5 is an explanatory diagram of an applied example, and FIG. 5 is an explanatory diagram of a positioning method in the apparatus of FIG. 2 to 5, the same parts as those in FIG. 1 are designated by the same reference numerals.

In FIG. 2A, a display panel, for example, a display panel 11 in which liquid crystal is filled in a gap formed by stacking a pair of glass substrates on which transparent electrodes are formed has alignment marks 13 formed in an outer region 16 of a display region 12. To do.

The alignment mark 13 has a width of, for example, a pixel.
About twice the width (660 μm) of (R, L) and the length is, for example, the display area 12
It has almost the same dimensions as the above, and is formed as a line colored in black or the like so as to be distinguishable from the surroundings, and a slit formed in the light shielding film.

When the mark 13 formed on the liquid crystal display panel 11 is a slit, the slit 13 is a light-shielding film for forming a black matrix necessary for the construction of the panel 11.
It is possible to form a black matrix pattern from a (metal chrome thin film or the like) at the same time as the black matrix pattern formation without requiring a special process.

In FIG. 2B, the right side of the lenticular lens plate 14 in which a large number of lenticular lenses 14 'are aligned in the left-right direction is opposed to the mark 13 when the lens plate 14 and the panel 11 are accurately aligned. A lenticular lens 15 is provided.

The lens plate 14 with the lens 14 'facing the display area 12 of the panel 11 is arranged on the front surface of the display panel 11 as shown in FIG. At this time, as described with reference to FIG. 1D, the display panel 11 and the lens plate 14 are positioned so that the mark 13 can be observed over the entire length through the lens 15.

In FIG. 3 showing another embodiment of the liquid crystal display panel, the liquid crystal display panel 20 includes a glass substrate 21 having a transparent electrode 22 for image display and a transparent electrode for alignment.
23, and a transparent electrode 26 for alignment is formed on a glass substrate 24 on which a counter electrode 25 for image display is formed.
And glass substrates 21 and 24 face each other so that and 26 face each other,
A liquid crystal 28 is filled between the glass substrates 21 and 24 which are hermetically sealed by a sealing material 27.

The transparent electrode 22 and the counter electrode 25 are connected to a drive circuit 29 for image display, the linear transparent electrodes 23 and 26 extending in the thickness direction of the drawing are connected to the drive circuit 30, and the panel is connected. A lenticular lens plate 14 provided with a lenticular lens 15 facing the transparent electrodes 23 and 26 is disposed on the upper surface of 20.

In the apparatus having such a structure, the lens plate 14 described with reference to FIG. 1 (d) is positioned by applying a predetermined voltage to the electrodes 23 and 26 by the driving circuit 30 to form a linear positioning mark (13). Is displayed, and the mark is observed with the lenticular lens 15.

In FIG. 4 showing the main part of the color rear projection display device according to the present invention, 31 is a light source lamp, 32 and 33 are condenser lenses, 34 and 35 and 36 are dichroic mirrors, and 37.
38 and 39 are liquid crystal display panels for displaying the colors of red, green and blue, respectively, and the display panel 3 is provided in front of the liquid crystal display panels 37, 38 and 39.
A projection lens 40 corresponding to each of 7, 38, 39 and an optical component 43 composed of an optical plate 41 common to the display panels 37, 38, 39 are arranged.

The optical plate 41 has a lenticular lens on one side.
A semi-transparent screen 42 is attached to the back surface of the lenticular lens plate 14 on which 15 is arranged. In such a device, as shown in FIG. 5, each display panel 37, 38, 39 is provided with a positioning mark 13 facing the lens 15 provided on one side of the lenticular lens plate 14 via a projection lens 40, and the optical plate Positioning of the display panels 37, 38, 39 with respect to 41 is performed by observing the marks 13 provided on the panels 37, 38, 39 with the lens 15 provided on the lens plate 14 so that the entire marks 13 are observed. The lenses 37, 38, 39 and the lens 40 are operated by operating a normal adjusting mechanism also included in the conventional device.

Therefore, as compared with the conventional method using the display image, the rear projection type display device in which the display electrodes are not driven by the application of the present invention has three panels 37, 38, 39 and lenses 40 and the like positioned. It will be easier.

In the above embodiment, the lenticular lens plate 14 is used. However, the present invention replaces the lenticular lens plate 14 with an optical plate capable of separating the display image on the display panel as desired, for example, a microlens plate in which a large number of microlenses are formed separately for right-eye pixels and left-eye pixels, or A slit plate provided with a slit corresponding to the right-eye pixel and a slit corresponding to the left-eye pixel can be used.

[0026]

As described above, the alignment mark provided on the display panel is observed by the lenticular lens provided on the optical component provided on the front surface of the display panel to position the display panel and the optical component. The apparatus of the present invention, which is carried out, has the effect of facilitating the alignment of the optical components with high accuracy without the need for a magnifying glass, a microscope, etc., and stabilizing the image and improving the reliability.

[Brief description of drawings]

FIG. 1 is a basic configuration of the present invention and an explanatory diagram thereof.

FIG. 2 is an explanatory diagram of a main configuration of an apparatus according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a main configuration of an apparatus according to another embodiment of the present invention.

FIG. 4 is an explanatory diagram of an embodiment in which the present invention is applied to a rear projection display device.

5 is an explanatory view of a positioning method in the apparatus of FIG.

FIG. 6 is an explanatory diagram of a configuration example of a conventional device using a lenticular lens plate.

FIG. 7 is an explanatory diagram of a problem when the lens plate of the conventional device is tilted.

[Explanation of symbols]

11, 20, 37, 38, 39 is the display panel 12 is the display area of the display panel 13 is the alignment mark of the display panel 14 is the lenticular lens plate (optical component) 14 'lenticular lens 15 is the lenticular lens for alignment 21 , 24 is the glass substrate of the liquid crystal display panel 23, 26 is the transparent electrode for the alignment mark of the liquid crystal display panel 28 is the liquid crystal 30 is the drive circuit for the transparent electrode for the alignment mark, 40 is the projection lens 42 is a semitransparent screen

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Nakabayashi 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Limited

Claims (5)

[Claims] 1. A display image reading device provided with a linear alignment mark (13) in an area outside a display area of a display panel (11, 20, 37, 38, 39) and arranged in front of the display panel. A display device characterized in that an optical component (14, 43) is provided with an alignment lenticular lens (15) facing the alignment mark when aligned correctly with respect to the display panel. 2. The display device according to claim 1, wherein the alignment mark (13) is a slit formed in a light shielding film. 3. The display panel (20) is a liquid crystal display panel, and the pair of glass substrates (21, 24) of the display panel comprises:
A linear transparent electrode (23, 26) facing the liquid crystal (28) is provided in an area outside the display area, and the transparent electrode is connected to the drive circuit.
2. The display device according to claim 1, wherein the display is connected to (30) and the alignment mark (13) is a linear display in which a voltage is applied to the transparent electrode by the drive circuit. 4. The optical component (14) is a lenticular lens plate, and the lenticular lens (15) and a large number of lenticular lenses (1) of the lenticular lens plate (1).
4 ') are aligned in the same direction as 4').
Display device described. 5. The display panel (3) comprises the optical component (43).
7, 38, 39), a projection lens (40) arranged in front of the display panel, a semitransparent screen (42) for projecting a display image on the display panel by the projection lens, and an optical plate for reading the projection image on the screen (42). 14. The display device according to claim 1, further comprising: 14), wherein the alignment lenticular lens (15) is provided on the optical plate.