JP2012194217A - Display board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display board in which a tone jump is not conspicuous.SOLUTION: The display board has a gradation display part 12 in which many dots P(m,n) to P(m+5,n+7) are arranged. The sizes of the dots P(m,n) to P(m+5,n+7) are irregular in arrangement in a gradation direction. The gradation display part 12 has a first area S1 in which dots adjacent to each other are brought into contact, a second area S2 in which dots adjacent to each other are not brought into contact, and a third area S3 in which places where dots adjacent to each other are brought into contact and places where dots adjacent to each other are not brought into contact are mixed. In the gradation display part 12 brightness gradually changes from the central part toward a peripheral part. A boundary B1 between the first area S1 and the third area S3 and a boundary B2 between the third area S3 and the second area S2 are concentrically circular.

Description

  The present invention relates to a display board having a gradation display section.

  Conventionally, various display panels having a gradation display portion that gradually changes the brightness by gradually changing the size of dots have been proposed, and disclosed in, for example, Patent Documents 1 and 2. The dots in the gradation display area may be referred to as “halftone dots”. Such dots gradually change in size in a direction in which the brightness gradually changes (hereinafter referred to as gradation direction).

  FIG. 5 is an enlarged schematic view of a part of the gradation display section. The dots Q (m, n) to Q (m + 5, n + 7) are gradually increased in the direction in which the brightness gradually decreases. The dots are the same size in the direction perpendicular to the gradation direction. That is, dots Q (m, n) to Q (m + 5, n), dots Q (m, n + 1) to Q (m + 5, n + 1), dots Q (m, n + 2) to Q (m + 5, n + 2), dot Q ( m, n + 3) to Q (m + 5, n + 3), dot Q (m, n + 4) to Q (m + 5, n + 4), dot Q (m, n + 5) to Q (m + 5, n + 5), dot Q (m, n + 6) to Q (m + 5, n + 6) and dots Q (m, n + 7) to Q (m + 5, n + 7) have the same size.

  In the gradation display portion, the non-contact region S4 where the adjacent dots Q (m, n) to Q (m + 5, n + 2) do not contact and the contact where the adjacent dots Q (m, n + 7) to Q (m + 5, n + 7) contact each other. And a region S5. In FIG. 6, dots that do not contact adjacent dots are represented by white circles, and dots having contact portions are represented by black circles.

Utility Model Registration No. 2526323 Japanese Patent No. 4501515

However, there is a problem that the brightness appears to change suddenly at the boundary B5 between the non-contact area S4 and the contact area S5. The boundary B5 is called a tone jump boundary.
The present invention has been made in view of this problem, and provides a display panel in which tone jump is not noticeable.

  The present invention is a display board having a gradation display section 12 in which a large number of dots P (m, n) to P (m + 5, n + 7) are arranged, as defined in claim 1, wherein the gradation display section 12 is The first region S1 where the adjacent dots are in contact, the second region S2 where the adjacent dots are not in contact, and the portion where the adjacent dots are in contact with the portion where the adjacent dots are not in contact are mixed. And a third region S3.

  Further, according to the present invention, as described in claim 2, the brightness of the gradation display portion 12 is gradually changed from the central portion toward the peripheral portion.

  Further, according to the present invention, the boundary B1 between the first region S1 and the third region S3, and the boundary B2 between the third region S3 and the second region S2, as described in claim 3. Are concentric circles.

  By providing the third region where a portion where adjacent dots are in contact and a portion where adjacent dots are not in contact is provided, tone jump is not conspicuous.

The front view which shows embodiment of this invention. The front view which shows embodiment same as the above. The schematic diagram which shows embodiment same as the above. The schematic diagram which shows embodiment same as the above. The schematic diagram which shows a prior art example. The schematic diagram which shows a prior art example same as the above.

  Hereinafter, an embodiment in which the present invention is applied to a display board 10 of an indicating instrument device will be described. The indicating instrument device displays the vehicle speed and the engine speed by instructing the display board 10 with the rotating pointer 20. The display panel 10 is illuminated by a light emitting element (not shown).

  The display board 10 is formed with an indicator portion 11 (scales and numbers) indicated by the pointer 20, a gradation display portion 12 and the like by screen printing. The gradation display unit 12 has a radial gradation direction, and the brightness gradually increases from the center (the rotation center A of the pointer 20) toward the periphery.

  The gradation display unit 12 has a non-contact area S1, a contact area S2, and a mixed area S3 between the non-contact area S1 and the contact area S2. The non-contact area S1 and the mixed area S3 are annular. The boundary B1 between the non-contact area S1 and the mixed area S3, and the mixed area S3, the contact area S2, and the boundary B2 are concentric. The color of the gradation display unit 12 is arbitrary.

  FIG. 3 is an enlarged schematic view of a part F of the gradation display unit 12. In order to help understanding, the dots P (m, n) to P (m + 5, n + 7) are illustrated in large figures. The screen printing of the gradation display unit 12 is desirably 100 lines (100 LPI) or more.

  The portion F of the gradation display portion 12 is a left portion of the rotation center A of the pointer 20 and the brightness gradually decreases from the left side to the right side. The gradation direction is the horizontal direction. The dots P (m, n) to P (m + 5, n + 7) are square and are arranged at equal intervals D in the vertical and horizontal directions. The sizes of the dots P (m, n) to P (m + 5, n + 7) are irregular in the gradation direction.

  The non-contact area S1 is an area where adjacent dots P (m, n) to P (m + 5, n + 1) do not contact. The contact area S2 is an area where adjacent dots P (m, n + 5) to P (m + 5, n + 7) are in contact with each other. The mixed region S3 is a region where a portion where adjacent dots do not contact and a portion where adjacent dots contact each other.

  FIG. 4 shows dots that do not contact adjacent dots as white circles, and dots having contact portions as black circles. In the non-contact region S1, all the dots P (m, n) to P (m + 5, n + 1) are not in contact with adjacent dots. In the contact region S2, all the dots P (m, n + 5) to P (m + 5, n + 7) have a contact portion. In the mixed region S3, dots that do not contact with adjacent dots and dots that have a contact portion are mixed.

  According to the present embodiment, in the third region S3, a tone jump is not conspicuous because a location where adjacent dots contact and a location where adjacent dots do not contact exist. In addition, this invention is not limited to this embodiment, A various deformation | transformation is possible. For example, the gradation display unit 12 of the present embodiment has a gradually changing brightness, but may be a gradation display unit in which the color gradually changes. In addition, although the dot shape of the present embodiment is a square, it may be a rhombus, a circle, or an ellipse.

12 gradation display portion S1 first area S2 second area S3 third area B1 boundary B2 boundary P (m, n) to P (m + 5, n + 7) dots

Claims (3)

  A display board having a gradation display portion in which a large number of dots are arranged, wherein the gradation display portion is adjacent to a first region where the adjacent dots contact, a second region where the adjacent dots do not contact, A display board comprising: a third region in which a portion where the matching dots contact and a portion where the adjacent dots do not contact are mixed.   The display panel according to claim 1, wherein brightness of the gradation display portion gradually changes from a central portion toward a peripheral portion.   The display according to claim 1, wherein a boundary between the first region and the third region and a boundary between the third region and the second region are concentric. Board.

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