JPH07199358A - Screen device - Google Patents

Abstract

PURPOSE:To easily carry out an adjusting operation at the time of adjusting convergence without complicating the adjusting operation and to make the protection on a screen possible by providing a screen device with an adjustment pattern which is arbitrarily settable according to the purposes of adjustment. CONSTITUTION:The pattern 3a for adjustment is arbitrarily settable according to the purposes for adjusting the necessary contents for various kinds of adjustment of a projection television, etc., and is provided with a central reference line necessary for centering of the screen or plural reference lines for comparing the inclination of a display image with respect to perpendicular and horizontal directions necessary for the convergence adjustment, etc. These reference lines are formed in grid form. Namely, various kinds of the adjustment of the convergence, etc., of the projection television are easily executed by using the pattern 3a for adjustment of an already stuck transparent film member 3. In addition, various kinds of the adjustment are executed by using the pattern 3a for adjustment composed by providing the pattern with the reference lines in a grid form and, therefore, the good adjustment is executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen device for image display used in a projection type television receiver or the like, and in particular, it can be arbitrarily set on the exit surface side of the screen according to the purpose of adjustment. The present invention relates to a screen device that can protect a screen and can easily perform adjustment such as convergence adjustment by attaching a transparent film having a special pattern.

[0002]

2. Description of the Related Art In general, with the spread of high-quality software such as satellite broadcasting and laser vision, a powerful screen and high image quality have been demanded for displays.

However, when an attempt is made to increase the screen size by using a direct-view tube type picture tube, there are problems that the weight becomes heavy and the manufacturing cost rapidly increases. Therefore, in order to increase the screen size from about 40 inches. Attention has been paid to a projection display using a CRT.

Such a projection type display is composed of three CRTs corresponding to RGB, which mainly serve as projection light sources.
(Projection tubes) are arranged, and the images of the respective projection tubes are projected through a lens onto a reflective or transmissive screen and combined to obtain an image.

As well known, there are two types of projection methods, a front projection type and a rear projection type. Generally, the surface projection type uses the reflection type screen and projects from the front side of the screen. The rear projection type uses the transmissive screen to project an image by projecting from the inside of the screen.

By the way, the rear projection type display is usually called a projection type television receiver (hereinafter abbreviated as a projection television), and has a level such as low price and high image quality that can be opposed to a CRT direct-view type television. Since it has been developed, it is widely used mainly for home use, or for industrial use requiring a large screen and for business use.

Such a projection television is C
Since an image is displayed on a transmissive screen by enlarging and projecting each display image of RGB using RT, color shift may occur on the screen. It is well known that color misregistration correction, that is, convergence adjustment is performed by using, for example, an analog or digital convergence correction circuit.

On the other hand, on the maker side, in the manufacturing process,
Adjusting the above convergence adjustment appropriately beforehand,
Adjustment is performed to position (position) the projected image light on the screen at the display center position, and in order to perform such adjustment, an adjustment member has been used conventionally, and The adjustment work may be performed by the operator's hand.

For example, as an example of such an adjusting member, a screen for constituting a projection television is attached with a tape or the like on which a reference line for performing the above adjustment is printed. The adjustment is performed, or the adjustment screen is provided as another member provided with such a reference line.

An example of the adjusting screen as the adjusting member is shown in FIG.

As shown in FIG. 5, the adjusting screen 10
Is framed by a frame member 12 on a screen 11 having the same material and shape as the projection television to be adjusted, such as convergence. A reference line 13 for adjustment reference is provided. The reference line 13 is formed by using, for example, a thin tape or a string.

Such an adjusting screen 10 is provided on the main body when adjusting the convergence of the projection television (not shown) or the like, for example, before attaching the screen of the product or when temporarily removing the screen. The adjustment screen is inserted and various adjustments are performed. After the adjustment, it is necessary to remove the adjustment screen and attach a new screen of the main body product.

When performing various adjustments using the adjustment screen 10, first, the reference line 13 is used to center the emitted image light of RGB, for example (center position determination).
And then convergence adjustment.

However, when performing the convergence adjustment using the adjustment screen 10 as described above,
For example, there is no standard for adjusting the horizontal and vertical linearity from the center to the periphery, and no standard for adjusting the inclination. Therefore, it is the actual situation that such an adjustment is performed by the operator's visual sense.

That is, if the convergence adjustment is carried out with the visual feeling of the adjusting operator, it goes without saying that a difference in quality occurs and the variation causes the reliability of the product itself to deteriorate. Will end up.

In addition, as described above, in order to perform various adjustments using the adjustment screen, the adjustment screen itself must be mounted on the product body, which makes the operation complicated. There is a problem that it is caused by a decrease in manufacturing efficiency.

[0017]

As described above, in the conventional screen device, with respect to the adjustment on the screen of the projection television, the adjustment of the centering of the emitted RGB image light with respect to the screen and the adjustment of convergence and the like are performed. In this case, for example, the adjustment of the centering of the RGB outgoing image light was first performed using the adjustment screen provided with the reference line for adjustment.
In the convergence adjustment, there is no standard to match the horizontal and vertical linearity from the center to the periphery, and there is no standard to match the inclination.Therefore, such adjustment is performed with the visual sense of the operator who makes the adjustment. Not only the difference in quality occurs and the variation causes the reliability of the product itself to be deteriorated. In addition, in order to perform various adjustments using the adjustment screen, the adjustment screen itself must be mounted on the product body, which also complicates the work and results in a decrease in manufacturing efficiency. There is a problem that it does.

Therefore, the present invention has been made in view of the above problems, and adjustments such as centering adjustment and convergence adjustment in a projection television can be performed without using an adjustment screen having a reference line.
Moreover, it is an object of the present invention to provide a screen device capable of easily performing the adjustment work at the time of convergence adjustment without making it complicated and protecting the screen.

[0019]

A screen device according to the present invention according to claim 1 is provided on a screen used for a projection type display, a transparent film member to be attached to the screen, and an upper surface of the transparent film member. A pattern that is configured by providing a reference line or a center point that serves as a reference for the adjustment content for screen adjustment and that can be arbitrarily set according to the purpose of adjustment. And The screen device according to the present invention according to claim 2 is a transmissive screen used in a rear projection television receiver, a transparent film member attached to the exit light surface side of the screen, and an upper surface of the transparent film member. And a reference line or a center point serving as a reference for the adjustment content for screen adjustment, which can be arbitrarily set according to the purpose of adjustment. It is characterized by

[0020]

In the present invention, a transparent film member having an adjustment pattern provided on the upper surface thereof is attached to a screen used for a projection type display, so that adjustments such as convergence adjustment in a projection television as a projection type display can be performed. , Which can be easily performed without using an adjustment screen, and moreover, a good and accurate adjustment result can be obtained by using the central reference points and the reference lines provided in a grid pattern which form the adjustment pattern. it can. Moreover, since the transparent film member can be used as a protective sheet for the screen, damage to the screen can be prevented.

[0021]

EXAMPLES Examples will be described with reference to the drawings. 1 to 4 show an embodiment of a screen device according to the present invention, FIG. 1 is a sectional view showing a schematic structure, and FIG. 2 is a perspective view of a structure in which the screen device shown in FIG. 1 is mounted on a projection television. 3 is a front view of the display screen shown in FIG. 2,
FIG. 4 is a diagram showing an example of a video display screen when the adjustment is actually performed.

As shown in FIG. 1, the screen device 1 according to the present embodiment has a surface (emission light surface side) of a screen (for example, a screen composed of a Fresnel lens and a lenticular lens) 2 that is usually used in a projection television. In addition, the transparent film member 3 having an adjustment pattern 3a for various adjustments such as convergence adjustment provided on the upper surface
It is configured by sticking. The transparent film member 3 is a transparent film-like sheet, and an adjustment pattern 3a for various adjustments such as convergence adjustment is provided on the surface (upper surface) opposite to the sticking surface side of the screen. There is. Further, the transparent film member 3 is formed to be slightly smaller than the effective display area of the screen 2 used for a projection television or the like, and is attached to the screen 2, and further, it is adjusted by using the adjustment pattern 3a. It can be easily removed from the screen 2.

As a means for easily removing the transparent film member 3 from the screen 2, for example, at least one corner edge of the screen 2 is provided with an unattached portion 2a with the transparent film member 3, that is, The portion where the transparent film member 3 is not attached is the locking portion 3b.
It is provided as. That is, when detached from the screen 2, the locking portion 3b of the transparent film member 3 can be pinched and peeled off.

Further, the transparent film member 3 prevents damage to the screen 2 due to, for example, work during the manufacturing process of a product formed by using the screen device 1 or transportation of the product when it is delivered to a user. It is also possible to have a so-called protective sheet function.

The adjustment pattern 3a can be arbitrarily set for various adjustments of a projection television or the like in accordance with the purpose of adjusting necessary contents. For example, a center reference line necessary for centering the screen. Alternatively, a plurality of reference lines are provided in order to compare the inclination of the display image required for convergence adjustment or the like with respect to the vertical and horizontal directions, and these reference lines are formed in a grid pattern. Therefore, the centering of the display image displayed on the screen, the horizontal and vertical inclinations of the display image in the convergence adjustment, and the linearity from the center to the peripheral portion can be aligned.

When the screen device 1 having such a configuration is actually attached to, for example, a projection television, it is constructed as shown in FIG.

As shown in FIG. 2, the projection television 4 is constructed by using the screen device 1. For example, the screen device 1 is fitted to the screen frame member 4b provided on the front surface of the housing 4a of the projection television 4. ing.

Further, as shown in FIG. 3, the transparent film member 3 is formed so as to be slightly smaller inward than the effective display area 5 on the screen 2 when it is mounted on the projection television 4. In this case, the outer peripheral portion of the screen 2 has a portion to which the transparent film member 3 is not attached, but the outer peripheral reference line of the adjustment pattern 3 a provided on the transparent film member 3 (the outermost portion of the pattern). Is provided at a predetermined position on the screen of the screen 2 so that the outer peripheral reference line can be clearly seen even during adjustment.

On the other hand, at least one corner edge of the screen 2 of the projection television 4 is subjected to convergence adjustment using, for example, the adjustment pattern 3a of the transparent film member 3, and then the transparent film member 3 is easily removed. And the unattached portion 2a to the screen
And a portion which is not attached to the screen 2 is bent in the front direction to provide a locking means 3b for the transparent film member. Thus, the transparent film member 3 can be easily removed together with the adjustment pattern 3a by pinching the locking means 3b and peeling the locking means 3b toward the center of the screen 2.

Further, the adjustment pattern 3 is provided with, for example, a center point 6 indicating the center position of the screen 2 necessary for various adjustments of the projection television 4 and a grid-like reference line 3a.

Next, a method of assembling and adjusting a projection television using a screen device will be described with reference to FIGS.

First, for the purpose of adjusting, for example, convergence or the like, the transparent film member 3 is provided with the adjustment pattern 3a having the reference lines 3a and the center reference points 6 arranged in a grid pattern as shown in FIG. The transparent film member 3 is precisely attached to the screen 2 to be attached to the projection television 4 in advance by using a predetermined device. At this time, an unattached portion 2a of the transparent film member 3 is provided on at least one corner edge of the screen 2, and a part of the transparent film member 3 which is not attached is bent to form an engaging portion 3b. Set up. This completes the screen device 1 attached to the projection television 4.

Next, in the screen assembling process in the manufacturing process of the projection TV 4, the screen device 1 is fitted to the screen frame member 4b of the projection TV 4 to complete the projection TV 4.
In the present embodiment, after the projection TV is manufactured first, the transparent film member provided with the adjustment pattern is attached to the screen front surface of the projection TV in a precise and predetermined position by using a predetermined device. Is also good.

After that, various performances of the projection television 4 are inspected. At this time, for example, the center of the RGB emitted image light emitted from the CRT built in the main body is surely the center of the screen with respect to the screen device 1. Adjustment such as center adjustment and convergence adjustment to adjust color misregistration.

In this case, in the case of centering the RGB outgoing image light shown as display information on the screen (on the screen), the adjustment pattern 3a provided on the transparent film member 3 as shown in FIG. Screen 2 with reference center point 6
Is used as the center reference point of the above, and the RGB emitted image light is aligned with the center of the display image.

Further, when the convergence adjustment is carried out, it is carried out by using the reference lines provided in the grid pattern of the adjustment pattern 3a as shown in FIG. 3, and for example, for the display image 7 as shown in FIG. Convergence adjustment is performed by using it as a reference when aligning the horizontal and vertical directions of, and the linearity from the center to the periphery. In this way, each adjustment for the projection television 4 is performed by using the adjustment pattern 3a provided on the transparent film member 3 as a reference.
Display image 7 at the normal position with centering as shown in
Can be displayed on the screen 2, and a display image whose color misregistration is corrected can be displayed, and the screen can be satisfactorily displayed even in the inclination of the display image with respect to the horizontal and vertical directions and the alignment of the linearity from the center to the periphery. Can be displayed.

After various adjustments, the transparent film member 3 shown in FIG. 3 can be easily removed by grasping the locking portion 3b and peeling it toward the center of the screen 2. Further, the transparent film member 3 may be removed, for example, when the user uses the projection television after shipping from the manufacturer,
In this case, since the transparent film member 3 also has a function as a protective sheet, the screen can be protected from damage due to transportation or the like until it reaches the user.

Therefore, according to this embodiment, the problems in the prior art can be solved, that is, by using the adjustment pattern of the transparent film member already attached to the screen without using the adjustment screen. Various adjustments such as convergence in a projection television can be easily performed, and various adjustments can be performed by using an adjustment pattern configured by providing reference lines in a grid pattern, so that good adjustment can be performed. Of course, the quality of the projection television can be improved. Further, since adjustment such as convergence adjustment can be performed without using the adjustment screen, it is possible to obtain the effect of improving the manufacturability of the projection television.

Further, since the transparent film member also has a function of protecting the screen, it is possible to prevent damage to the screen due to work and damage to the screen due to transportation of the product.

Further, the adjustment pattern can be arbitrarily set in accordance with the necessary adjustment content, so that the adjustment in the projection television can be easily performed.

In this embodiment, of the projection type display, the transparent film member is attached to the screen used in the rear projection type projection television. However, for example, a projector and a screen are used. May be configured as a front projection type screen that is physically separated from each other. Even in this case, the adjustment such as the convergence adjustment can be favorably performed by using the adjustment pattern.

In the present embodiment, the adjustment pattern has been described to be arbitrarily set according to the content of the adjustment purpose in the projection type display. For example, the adjustment pattern is used as a separate member for various adjustments. A large number of types may be formed in advance and may be attached to the upper surface of the transparent film member according to the purpose of adjustment, and the same effects as those of the above-described examples can be obtained and a wide range of adjustments can be performed. Is clear.

[0043]

As described above, according to the present invention, when the adjustment such as the convergence adjustment in the projection television of the projection type display is performed, the convergence is easily adjusted without using the adjustment screen. In addition, since the reference lines forming the adjustment pattern of the transparent film member are formed in a grid pattern, accurate and good adjustment results can be obtained, and various adjustments can be easily performed. Therefore, the productivity can be improved. Furthermore, because it also has a protective sheet function to protect the screen,
It is clear that the reliability of the product can be obtained.

[Brief description of drawings]

1 to 4 show an embodiment of a screen device according to the present invention, and FIG. 1 is a sectional view showing the configuration of the screen device.

FIG. 2 is a perspective view of a projection type television receiver configured using the screen device shown in FIG.

FIG. 3 is a front view showing an example of a special pattern provided on the transparent film shown in FIG.

FIG. 4 is a view showing an example of a display image when the screen device shown in FIG. 1 is used, and an explanatory view for explaining the operation of this device.

FIG. 5 is a perspective view showing an adjustment screen used for convergence adjustment and the like of a conventional projection type television receiver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Screen device 2 ... Screen 2a ... Unattached part 3 ... Transparent film member 3a ... Adjustment pattern 3b ... Locking part 4 ... Projection television 4a ... Housing 4b ... Screen frame member 5 ... Effective display area 6 ... Pattern or screen Center position of 7 ... Display image

[Procedure amendment]

[Submission date] January 14, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

[Figure 3]

[Figure 4]

[Figure 5]

Claims (2)

[Claims] 1. A screen used for a projection display, a transparent film member attached to the screen, a reference line or a center point provided on the upper surface of the transparent film member and serving as a reference for adjustment contents for screen adjustment. A screen device, comprising: an adjustment pattern that can be arbitrarily set according to the purpose of adjustment. 2. A transmissive screen used in a rear projection type television receiver, a transparent film member attached to the outgoing light surface side of the screen, and a screen provided on the upper surface of the transparent film member for screen adjustment. A screen comprising a reference line or a center point that serves as a reference for the adjustment content, and an adjustment pattern that can be arbitrarily set according to the purpose of adjustment. apparatus.