JPS6118197B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to information display devices such as calculators and watches;
In particular, the present invention relates to a simple display device that displays a plurality of display bodies in different colors.

Conventional different color display devices used methods such as irradiating a transparent plate with different color lamps, as seen in Utility Model Publications 46-81, for example, so multiple dedicated different color lamps were always required, and the structure of the display surface also changed. complex,
Furthermore, it has been difficult to display different colors with uniform and clear contrast. In addition, different color display substances have not been put to practical use at present.

In view of the above-mentioned difficulties, the present invention makes it possible to easily display different colors by using optical filters with different characteristics on the display surface.

FIG. 1 is a perspective view of an embodiment of the present invention, in which a display panel 1 displays numerical data 2 of one type (for example, operands, answers, etc.) and numerical data 2 of other types (for example, operands, constants, etc.). Data 3 is displayed.
At this time, an optical filter 4 for blocking external light or emphasizing emitted light is placed on the display panel 1 to constitute a display device. This optical filter 4 has, for example, a short wavelength transmission window 4A and a long wavelength transmission window 4B corresponding to numerical data 1 and 2.

In this case, assuming that a fluorescent display tube is used as the display panel 1, an example of its light emitting characteristics is shown in FIG. If the relationship between the transmittance curve SA of the short-wavelength transmission window 4A and the transmittance curve LB of the long-wavelength transmission window 4B is established as shown in the figure for the emission characteristic D of the fluorescent display tube, there are two points, blue and green. Since the numeric data 2 has a luminescence peak in , the human viewing the display clearly sees the numerical data 2 in green and the other types of numerical data 3 in blue. In this way, different color display can be easily achieved by using a filter that transmits each peak in a display material having a plurality of emission peaks.

Note that when a liquid crystal is used for the display panel, the effect of the present invention is even greater because this element does not emit light itself but displays by absorbing and reflecting external light. In other words, since the entire wavelength range of natural light can be used, extreme color combinations such as red-green, yellow-blue, etc., are possible, and red-orange-yellow-
Many types of color combinations are also possible, such as green-blue-purple.

In the above description, an example was given in which the display panels use the same elements.

Note that the present invention is applicable not only to displaying multiple pieces of numerical data at the same time, but also to displaying characters (alphabetic or kana characters),
It is also effective for displaying data in combination with numbers such as special patterns. (See Figure 10) The material for realizing the present invention only needs to have the above-mentioned optical characteristics, and generally, a specific wavelength absorbing material is added to transparent glass, or a predetermined optical property is added to the transparent glass surface. This is achieved using techniques such as ordinary optical lens techniques such as surface roughening and coating to give it characteristics. Furthermore, the filter substrate may be made of plastic, and the same treatment as in the case of glass may be considered for transparent acrylic or the like.

Alternatively, it can of course be realized by a mechanical structure such as having two glass panes in one part and a single glass pane in the other part.

FIG. 3 is a perspective view of a specific embodiment of the present invention, in which fluorescent display devices are provided in two stages above and below, and an integral tube G is provided.
This is an example provided in G2. That is, a plate forming the numerical segments of the upper numerical display on the substrate C.
PUA, PUB, etc. and plates PLA, PLB, etc. that form the numeric segments of the lower numeric display are provided. A fluorescent substance is placed on each plate. Grids GU and GL and filaments FU and FL are provided thereon, and for example, grids GU and GL are connected by lead G ^l1 and commonly driven by G ^l2 , and plates PUA and PLA and PUB and PLB are connected. C
They are connected by leads ^PlA and ^PlB on the back side and driven in common, forming a two-stage numeric display numeral as seen in Japanese Patent Laid-open No. 51-35234 and No. 35299. At this time, it is preferable that the upper and lower numerical displays are reliably selected during dynamic drive, but electrons often fly from the upper filament FU to the lower plates PLA, PLB, etc., resulting in display leakage, etc. It causes.
Also, using two glasses, glass 4 and G ₂ , reduces brightness.
This is undesirable as it is uneconomical. In order to solve this problem, as shown in the cross-sectional view of No. 4A, the surface glass tube G ₂ itself has the function of the glass 4 described above, and its upper and lower boundaries are made to protrude inward, and transparent conductive material N is applied to that part. By providing a negative potential or the like, it is possible to prevent electrons from flying from FU to PLA or the like. Figure 4B is an example in which transparent conductive material N is provided on the upper and lower boundaries of the surface of glass _G2 without protruding glass _G2 , and Figures 4C and 4D are examples in which glass _G2 is provided on the inner surface without protruding inward. For example, in Figure 4E, transparent conductive materials NU and NL are provided on the inner surface of glass _G2 facing the upper and lower numeric display devices, and filaments FU,
This is an example of connecting to the FL to eliminate harmful effects such as electrostatic effect caused by contact with fingers, etc. At this time, it is preferable that the potential of the transparent conductive material N is set in a more negative direction than NU and NL. 5A and 5B are examples in which the movement of electrons between the upper and lower stages is mechanically prevented by a glass wall protruding inside the glass _G2 instead of an electric shield.

Figure 6A shows an example of shielding by applying a predetermined negative potential to a metal wire M instead of a transparent conductive material, and Figure 6B shows an example in which a metal wire M is provided on the surface of glass _G2 , sunk, and a positive voltage is applied. This is an example that takes advantage of the fact that negative charges are transmitted through the inner surface of glass _G2 . In this case, it is preferable that the shielding metal wire M also be used to display the dividing line in the case of 123×45=5535 as a three-stage display. (See Figure 11) Also, Figures 4A and 4C are examples where the upper and lower plates and grids are common, Figures 4B, 5A, and 5A are examples where the upper and lower plates are independent and the grid is common, and Figure 4D is an example where the upper and lower plates are common. , grid-independent example, 4
Figures E, 5B, and 6B are examples in which the upper and lower plates and grids are independent. In addition, in Figure 4E
NU and NL can be used in any example. In addition, this shield mechanism can be expected to have the effect of preventing display leakage in all examples, but especially in the cases of independent plates and common grids as shown in Figures 4B, 5A, and 5A, it can prevent uneven display brightness, making it possible to prevent digits above and below. It has the effect of lighting evenly. Furthermore, even when various display materials such as liquid crystal, electroluminescence, electrochromy, etc. are used in addition to fluorescent display materials, if the present invention is applied, the numerical displays in the upper and lower rows will be reliably selectively colored, and unnecessary information will be removed. It is possible to eliminate uneven display and color development, and improve display contrast. Also, 4th A, 4th
The drive circuit of FIG. 7 is applied to FIG. In the figure, DPG is a digit pulse generator that generates digit pulses D ₁ to D _o , FD is a filament selection drive circuit, and SS is a segment selection drive circuit that is dynamically driven. Upper and lower stages are selected using the drive signal F ₁ from FD. This is done by switching between and _F2 . Figure 8 shows 4B, 5A,
This circuit applies to 6A, and the selection of the upper and lower stages is performed using drive signals P ₁ U to _{P 13} from the segment drive circuits SSU and SSL.
This is done by switching between P ₁ L and P ₃ L. Fig. 9 is a circuit applied to Fig. 4D, and the upper and lower stages are selected using drive signals D ₁ U to D _o U from the digit pulse generators DPGU and DPGL.
This is done by switching between D ₁ L and D _o L. glass
The number of input terminals to G ₁ and G ₂ is the least in FIG. 7, so it is the most preferable. FIG. 12 shows an example in which the present invention is applied to a calculator, where S is a switch for selecting one or both of the displays, and it is preferable for operation to provide a mark corresponding to the display color as shown in the figure.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a graph explaining the features of an embodiment of the present invention, and FIG.
The figure is a perspective view of one specific embodiment of the present invention, Nos. 4A to 4.
Figures E, 5A, 5B, 6A, and 6B are cross-sectional views of various embodiments of the present invention, Figures 7 to 9 are diagrams showing circuit examples used in Figures 4 to 6, and Figures 10 and 11 are cross-sectional views of various embodiments of the present invention. FIG. 12 is a diagram showing an example of use of the present invention. 4... Optical filters with different characteristics, M, N...
shield.

Claims (1)

[Scope of Claims] 1 A plurality of rows of display bodies using the same element having a plurality of light emitting components are arranged on a single display panel, and a first light emitting component is transmitted onto the display bodies belonging to one row. 1. A display device comprising a filter and a filter that transmits a second light emitting component different from the first light emitting component on a display member belonging to the other column. 2. The display device according to claim 1, wherein the first and second luminescent components of the display body have first and second luminescent peaks, respectively.