JPH0629746B2 - Dot pattern of illumination adjustment film in indicating instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a dot pattern of an illumination adjusting film formed by printing on a dial in order to equalize the brightness of the display section on the front of the dial during illumination of the indicating instrument. Related to the improvement of.

(Prior Art) Japanese Patent Publication No. 53-2065 discloses that, in an indicating instrument, an illumination adjusting film is formed by printing on a dial in order to make the brightness of a display portion of the dial uniform during illumination. .

This illumination adjustment film is formed by a dot pattern in which the size of dots in each element of the virtual matrix on the dial plate surface is changed according to the light blocking ratio required for equalizing the brightness. For example, one dot having an area of a required light blocking rate corresponding to the area of each element of the virtual matrix is provided.

(Problems to be Solved by the Invention) As described above, the conventional dot pattern is configured to change the size of dots in each element of the virtual matrix according to the light blocking rate. Therefore, the shading rate is 0%
The dot becomes very small in the vicinity of, and when this is printed on the dial by screen printing, the dot may be blurred, so there is a limit to the size of the dot. It is also conceivable to use a dot as a non-printing area when the light blocking rate is close to 100% and change the size of the dot according to the light blocking rate. As the dots get smaller and crush when approaching 100%, there is naturally a limit to the size of the dots that are non-printed areas. Therefore, the inventor of the present application has previously proposed a means for reducing the number of dots in this area by constructing an area in which a plurality of elements provided with dots are arranged in the range where the light blocking rate is close to 0% and 100% (see (Heihei 1-343543).

However, even if the number of dots in the area is reduced and the dot formation position is a well-balanced position in the area, when observed from the entire dial, the relationship between the dot position and the dot position in the adjacent area In some cases, the dots may be close to each other or may be far from each other, and thus the purpose of uniforming the brightness may not always be achieved.

(Means for Solving the Problems) In view of the above problems, the present invention aims to achieve dot positions in areas where the number of dots is reduced.
That is, the dot pattern of the illumination adjustment film of the indicating instrument according to the present invention is a dot pattern of the illumination adjustment film printed and formed on the dial to make the brightness of the dial uniform when the indicating instrument is illuminated. In the case where the size of the dot that defines the light-shielding portion or the non-light-shielding portion in the element is changed according to the light-shielding rate, and when the respective elements having the dot size of a predetermined value or less are adjacent to each other, , These elements are collected to form an area, the number of dots is reduced in this area, the dot size is changed to satisfy the average light blocking ratio in the area, and a plurality of areas are collected to form a block. It is characterized in that the dot positions in the block are arranged and formed in a well-balanced manner in consideration of the dot positions of adjacent areas and elements. Than it is.

(Operation) In the area where the number of dots is reduced, the brightness is made uniform by adjusting the dot position within the block with multiple areas as one block.

(Example) Next, the Example of this invention is described.

The basic unit that defines the dot pattern is element 1 that divides the dial surface into a virtual matrix, and 4 x 2 x 2
An area 2 composed of individual elements 1 and a block 3 composed of a plurality of areas 2. As shown in FIG. 2, the dot pattern is provided within each area 2 with dots 4 of the same size having an area calculated so as to obtain the average light blocking ratio in the area of the area 2. The dot 4 is shaded in correspondence with the shading rate, and the positive negative of the dot 4 portion is reversed at a predetermined shading rate or more. Further, when the light blocking rate is particularly close to 0% or 100%, the number of dots 4 in the area 2 is reduced to 3, 2, and 1 as shown in FIG. The size of the dot 4 is changed to satisfy the ratio, and it is possible to correspond to the light blocking ratio while maintaining the practical minimum size of the dot 4.

The present invention not only reduces the dots 4 in the area 2, but also changes the position of the dots 4 when the dots 4 are further reduced. That is, as shown in FIG. 1, the area 2 in which the number of dots 4 is reduced constitutes one block 3 together with the adjacent area 2 in which the number of similar dots 4 is reduced. The positions are determined by taking into consideration the positions of the dots 4 in the area 2 (which may be the element 1) adjacent to the block 3 and, for example, in the case illustrated in FIG. The array is arranged so that it is equidistant from the dots 4 in the adjacent areas 2.

Therefore, when observing the position of the dot 4 including the block 3 and the area 2 adjacent to the block 3, the light shielding rate changes naturally, and the uniformity of the lightness is further effectively achieved.

The present invention is not limited to the above-described embodiment. For example, in the case where the number of dots 4 does not need to be reduced, the dots 4 corresponding to the light blocking rate for each element 1 are not particularly introduced. Of the area may be determined, or the area 2 may not be composed of 4 of 2 × 2 and may be 9 of 3 × 3.
Further, the configuration of the block 3 is not necessarily a combination of only the area 2 in which the number of dots is reduced, and the block 3 may be configured by a combination of the area 2 in which the number of dots 4 is reduced and the non-decreasing area 2. Modifications are possible within the scope of the subject.

(Effects of the Invention) The present invention uses the means of reducing the number of dots in the area of the dot pattern of the illumination adjustment film of the indicating instrument as described above, thereby widening the range of light-shielding ratios that can be handled and reducing the number of dots. A plurality of areas including reduced areas are collected and divided into blocks, and dots are arranged appropriately within the blocks.Illumination in an indicator instrument that makes it possible to make the brightness uniform at both ends of the shading rate. A dot pattern of the adjustment film can be provided.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a diagram showing an example in which a dot arrangement in an area unit is converted into a dot arrangement in a block unit, and FIG. 2 shows a dot pattern corresponding to a light blocking rate in an area unit. FIG. 3 and FIG. 3 are partially enlarged views of FIG. 2 and show both end portions of the light blocking rate. 1 is element 2 is area 3 is block 4 is dot

Claims (1)

[Claims] 1. A dot pattern of an illumination adjusting film formed by printing on a dial for equalizing the brightness of the dial during illumination of an indicating instrument defines a light-shielding portion or a non-light-shielding portion in an element of a virtual matrix. In the case where the dot size is changed according to the shading rate, and when the respective elements having the dot size of a predetermined value or less are adjacent to each other, these elements are collected to form an area. Then, while reducing the number of dots in this area, the size of the dots is changed to satisfy the average light blocking ratio in the area, and a plurality of the areas are collected to form a block, and the dot position in the block is determined. A dot pattern of an illumination adjustment film in an indicating instrument, characterized in that the dot patterns of adjacent areas and elements are arranged and formed in a well-balanced manner.