JPS5910908A - Stripe filter and its production - Google Patents

Abstract

PURPOSE:To decrease the fluctuation in the mutual relations among respective stripe filters by forming one color filter with two kinds of filter layers, and making one of the filter layers usable commonly as a filter layer of the other color filter. CONSTITUTION:The superposed parts of filter layers 5a, 5b, 5c- and filter layers 7a, 7b, 7c- form one stripe filter, and the unsuperposed parts of the filter layers 7a, 7b, 7c- form one stripe filter as well. The stripe filters of green and yellow possess commonly a part of the characteristics of the yellow filter layers 5a, 5b, 5c- and the yellow and pale magenta stripe filters possess commonly a part of the pale magenta filter layers 7a, 7b, 7c-; therefore, the variance in the color tone of the one filter layer gives an influence simultaneously on two kinds of the stripe filters. Thus the spectral characteristics of the respective stripe filters have mutual relations and the correlation among color characteristics are automatically maintained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stripe filter formed on a glass face plate of a 2005-2015 KTV camera, and a method for manufacturing the same.

There are various types of single-frame television cameras, and correspondingly, there are various configurations of striped filters, including multilayer filters. Among these stripe filters, the present invention particularly provides a stripe filter that transmits green light, a stripe filter that transmits complementary color light of one of the three primary colors other than line, and a stripe filter that transmits all three primary colors. This invention relates to a striped filter consisting of a light magenta striped filter that blocks part of the white or green light that is intended for use, and a 3ft method for manufacturing the same.

Figures 1(a) to 1(c) are cross-sectional views of each process in manufacturing a conventional striped filter.In the figure, 1Q
It is a transparent glass substrate, on which a photosensitive agent is molded,
The area exposed through the first original plate is printed, and the remaining exposed area is dyed, for example, green, and the special (41+a) shown in Figure 2 is dyed.
Filters 2a, 2b, which have spectral transmittance characteristics such as
2o, - is formed (Fig. 1 (&1)). These filters are formed in a stripe shape extending in the direction of the front and back of the paper in the figure, with a voltage of 15 rV and a voltage of 1,000 rV.

Next, in the same manner as the filters 2m, .
Striped filters 3m, 3b, 3c, . . . having spectral transmittance characteristics as shown in the figure are formed (FIG. 1(b)). Next, between these filters, a striped filter 4m having a spectral transmittance characteristic such as characteristic C in FIG. 2, for example, dyed pale magenta,
4b, 4c, . . . are formed (Fig. 1(C)).

However, in such a striped filter made up of three filters, the color tone of each filter varies independently without any correlation. On the other hand, as standards for the color characteristics of filters, in addition to the items in which each filter is evaluated individually as 1f111Ii, there are also items in which the mutual relationship of filters is evaluated. For this reason, if the color tone of each filter varies independently due to variations in each support element during manufacturing, there is a problem in that some filters deviate from the standard when evaluating the mutual relationship between the filters, resulting in a significant decrease in manufacturing yield. .

The present invention has been made in view of these points, and its purpose is to improve the evaluation characteristics of the mutual relationship of each filter and improve the yield, as well as to reduce the variation range of color reproducibility of color television cameras. An object of the present invention is to provide a striped filter with a small size and a method for manufacturing the same.

In order to achieve such an object, the present invention forms a filter of one color using two types of filter layers, and one of the filter layers serves as the filter layer of the filter of another color. I'll go.

Hereinafter, the present invention will be explained in detail with reference to some examples.

Figures 3 (,) to (,) are diagrams showing the manifestation of each manufacturing process of an embodiment of the striped filter according to the present invention, and Figure 4 is a diagram showing the spectral transmittance characteristics of the valley filter and filter 1-. be.

First, on the transparent glass substrate 1, the spectral transmittance characteristic of the yellow color WM (Fig. 4 d), which has the short V side of the spectral transmittance characteristic of the green tone (Fig. 4 a) as %, is measured. 5 m of filter layers having
5b, 5c, . . . are formed in parallel to each other in a stripe shape extending in the front and back directions of the paper surface over the width where two live filters are to be formed in the future (Fig. 3 (a)).
, the filter layers 5&, . . . are formed by a conventional method by exposing a photosensitive agent using a mask, developing it, and dyeing it in a predetermined color.

Next, a temporary filter layer 5& on which a transparent thin intermediate peritoneal membrane (not shown) is formed as necessary.

Green color 11 is applied to the part corresponding to the width of 4i on 5b and 5c.
The spectral transmittance characteristic of the cyan color that characterizes the long wavelength side of the spectral transmittance characteristic (FIG. 4a) (forming the filter layer 6 m + 6 b + 6 c (i
Bg3 figure (b)). As a result, filter layers 5, 5b,
5c and filter layers sa, 6b, and t3Co [The folded portion forms one line filter, and its spectral transmittance characteristics are as shown in FIG. 4a.

Next, an intermediate protective film (Ta) and a film (not shown) were formed thereon as necessary, and 81i of the remaining rod width of the filter layers 5m, 5b, and 5c and l of the filter layers 5m, 5b, and 5c were formed.
Filters 717m, 7b, and 7c that control the spectral transmittance characteristics of pale magenta color BJ- (FIG. 4C) are formed in the a gap (part where filter 1- is not formed) (FIG. 3(C)). )). A retainer idmTh (not shown) is formed on this layer as necessary.

As a result, two types of stripe filters are formed in addition to the previous stripe filter.

That is, the overlapping portion of the filter layers 5m, 5b, 5o, . It's a trench, filter layer Ia, 7b,
The non-overlapping portions of 7c, . . . also form one Strife filter, and the spectral transmittance temporality thereof is as shown in FIG. 4C.

Therefore, the green color is similar to the percentage shown in FIG.

A striped filter consisting of three yuzus of yellow and pale magenta can be obtained.

In such a striped filter, the green and yellow striped filter has a yellow filter layer 5a.

The yellow and light magenta stripe filters share part of the characteristics of the light magenta filter layers 7m, 7b, 7c, -.
h, so the color tone variation of one filter layer e
In addition, since the two types of stripe filters are affected simultaneously, the spectral characteristics of each stripe filter have a mutual relationship, so that the correlation in color percentage is automatically maintained. For this reason, if the interrelationship of the three color characteristics is specified due to the color TV signal installation, even though the individual color vll may fluctuate somewhat, the color tone of each stripe filter will not change much relatively. , making manufacturing easier and improving productivity.

Next, other embodiments will be described using FIGS. 5(,) to (C).

In the figure, first, cyan-toned filter layers 6m, 5b, 5c, etc. are formed on a glass substrate 1, and a pale yellow dye or ultraviolet blocking dye is mixed therein. After forming the intermediate security FaIII!! according to the
A photoresist film is formed on this. Then, the filters N 6 m , 6 b , 5 c are exposed from the back surface (lower side in the figure) of the glass substrate 1 instead of exposure using a normal mask.

...is used as a mask for exposure. Filter layer sa, sb
.

6c... blocks almost the entire spectrum of the exposure light by mixing the above-mentioned dye, so that this filter layer serves as an original and the area without the wide filter layer is exposed without positional selectivity. After exposure, only the exposed areas are left exposed.
This part is dyed with light magenta and the filter layers 7a, 7 are dyed.
b, 7a is formed (Fig. 5(b)). Next, a yellow filter is applied to the difference in width between the filter layer 6 a + 6 b r 6 (+ + ...) and the filter J#7m, 7b, 7 (+, ...) using a method using a normal mask. layer 5
m, 5b, 5c, ... are formed. This stripe filter has exactly the same filter arrangement configuration as the stripe filter shown in FIG. 3, except that the order in which each filter layer is formed is different.

In this embodiment, when forming the light magenta filter J-, back exposure is performed using the cyan filter JIiIi as a mask, so there is an advantage that the position of the filter layer can be formed extremely accurately.

Although a dye such as a pale yellow dye was mixed into the cyan filter J- in this example, if the cyan color tone itself is one that continuously cuts off the sensitive effective wavelength component of the exposure light beam, a dye may be mixed separately. There's no need.

Further, when a dye is mixed, it is necessary that it does not substantially affect the line spectral characteristics of characteristic 1 in FIG. If the dyeing property of the dye having characteristic f in FIG. 4 is stable and constant dyeing properties can always be obtained, this influence can be anticipated in advance.

6 and 7 show other embodiments of the stripe filter.

In the example of FIG. 6, cyan fill layers 6m, 6b
After forming 16C+..., yellow fill layer 5m, 5
1), 5C+... were formed, and then light magenta filter layers 7m, 7b+7C+... were formed. In the example of Fig. 7, yellow filters 7m5a, 5b, 5c, etc. are formed, and then cyan filters 7m6m are formed. , 6b, 5c, .

These filters have exactly the same filter arrangement configuration as the striped filter shown in FIG. 3, except that the order in which the valley filter layers are formed is different.

The embodiment shown in FIG. 5 has the advantage of eliminating the step difference in the filter layer, while the embodiment shown in FIGS.

In the embodiment shown in FIG. 7, the color tone of the portion having a nominal width of i can be changed by using the step. In other words, since the filter 1m is made of a ceranan-like material, the lower width part on the substrate is thicker, and the upper A width part of the oil filter J-type is thinner, and as a result, the JJ In some parts, the color plate becomes relatively thin, and in thin parts, the color tone becomes relatively light.

In each of the embodiments described above, the stripe filter was configured with a combination of 3 m of green, yellow, and pale magenta, but it is also possible to use white instead of pale magenta.

In this case, a filter layer without spectral transmission selectivity is used instead of the light magenta filter 1-.

Furthermore, embodiments in which the yellow filter layer and the cyan filter layer of each '-X embodiment are interchanged can also be constructed at will.

In this way, in a color television camera that uses the entire faceplate formed with striped filters according to the present invention, there is less variation in the mutual relationship between the striped filters, so that red,
The balance between the amounts of 1 gram and green is maintained, and the range of variation in color reproducibility can be reduced. In addition, improving the manufacturing yield of striped filters enables JJ to improve productivity.

Furthermore, the method for manufacturing a striped filter according to the present invention has many excellent effects, such as being able to form the filter layer at an accurate position, simplifying the process, and improving economic efficiency.

[Brief explanation of the drawing]

Figure 1 shows the various steps of a conventional stripe filter;
FIG. 3 is a cross-sectional view of each step of one embodiment of a striped filter according to the present invention, FIG. 4 is a spectral transmittance characteristic diagram of the striped filter and filter layer, and FIG. 5 is a cross-sectional view of each step of another embodiment. 6 and 7 are sectional views of different embodiments, respectively. 1...Glass substrate, 5 a, 5b, 5ce @ 1
1 a yellow filter layer, 6m, 6b, 6cm... cyan filter layer, 7m, 7b, 7c fist... pale magenta filter layer. Representative Patent Attorney Susuki 1) Tori -Yuki” Figure 5 to+ Figure 6 37-

Claims (1)

[Claims] 1. Green, yellow, white or pale magenta, or green. When using a striped filter consisting of cyan, whitish or pale magenta, the green spectrum'+! A striped first filter layer that characterizes either the long wavelength side or the short wavelength side of the spectral characteristic, and a first filter layer that characterizes the spectral characteristic of the spectral line are formed so as to be approximately A-shaped in the width direction. Striped second
With the filter tm, the clean parts are painted green, and the non-overlapping parts of the first filter layer are left as they are, or a light magenta striped third filter layer is applied. The stripe filter is characterized in that it has a two-layered filter, a tip of the tip #11, μ =; 2. Green, yellow, white or pale magenta, or green. In the fourth manufacturing method, a second layer is placed on a transparent substrate to characterize either the short wavelength side or the long wavelength side of the line spectral characteristics.
A filter layer is formed, then a photosensitive layer is formed on this layer, and then the second filter layer is used as a mask to expose light from the back through the transparent substrate, and after development, the exposed areas are dyed pale magenta, and then these Line spectral characteristics song 1 is shown above.
A striped first filter layer that characterizes ft11 was formed so that the width of the bamboo was on the second filter layer, and the remaining width of A was on the width of i of the pale magenta dyed part. A method of manufacturing a striped filter that is characterized by this. 3. The second filter, which characterizes the long wavelength side of the line spectral characteristics, is Fuku9'A. 2. The method for manufacturing a striped filter according to item 2.