JPS58105739A - Display board for sight capacity measuring apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for measuring (testing) visual ability, including the brightness of indicators such as letters, numbers, and symbols within the visual field. This invention relates to a display board VC for a visual ability measuring device I that can be electrically controlled by VC.

Conventionally, as a display board, which is the main component of a state ability measuring device, an indicator is drawn on a white board using a kayu tōka, and the indicator surface is illuminated from the two rules of the white board, and this indicator is displayed as a member. What is displayed is Yari-J. With this display device, there are only two brightness levels on the surface: on or off. In addition, the display method is to draw the index n7 (the retraction board is operated electrically, and the index surface has to be unavoidably large. In recent years, in order to eliminate the drawbacks of the L period) Then, the index is divided into each pixel, and each pixel is divided into a light emitting diode or fluorescent tube for direct lighting, a liquid crystal display for IR lighting, and a Japanese-shaped (Japanese character) for numerical display. Attempts have been made to re-build the bridge to a predetermined designation (7-segment type).In the above-mentioned display board based on this method,
The space on the display is either 1 or 2, the brightness of the indicator surface is not limited to the conventional two ways of tapping, the variable range of rotation is extremely narrow, and the method of historical VC lighting is also the same as the conventional example.
Continuing ar at a short cycle is possible in each of the above steps.
This cannot be expected due to the durability of the cable material.

The present invention aims to provide a display board f for a 5L capacity sub-status device which solves all the above-mentioned problems, and this display board is a solid flat plate having an electro-optical effect.
A transparent electrode is provided on the entire surface of the corresponding part, and the transparent electrode on the front and back
Enjoy the 11th solid flat plate through the 11th million times of the original shutter element using the vertical effect of applying the VC I #, which can transmit the light to the 1st flat surface of the temporary surface of the sliding shelf VC41M blue. It is something that DESCRIPTION OF THE PREFERRED EMBODIMENTS An explanation will be given below based on drawings showing an example of the configuration and operation of the present invention. Figure 1 shows the outline of the structure of the display board. In Figure 1, tl) is the indicator board, and I2) is the surface of the indicator board (1). : A light shutter system is provided. This optical shutter element (2
) utilizes a solid flat plate having the effect represented by PLZ'r (a general abbreviation for a transparent pressure vessel based on lead oxide). n When the indicator plate 11) is displayed using transmitted light, a dotted line arrow starts from the left side of the indicator plate 11), and when the indicator plate 11) is displayed by self-luminescence, the indicator, slope 11) and optical shutter element are indicated. The light indicated by the dotted line extending through the center of +21 is emitted from the display board, and the indicator board (1)
It can be seen with the optical gold eye 3) corresponding to the slide 4 indicated by the actual machine arrow within the parent #- indicated by the dotted line 2f: in the 6th subdivision of . Figure 2 shows the details of the shutter element t21 in AiJ format. 1f
(7) and (8) are polarizing plates (or polarizing films with good A
), and this base plate L7) +81 is provided so as to face the transparent electrode I61 +6). Such a concave optical shutter element 2) has an upper flat surface 1 m 111 that can transmit light f on the surface of the index plate (1).
W and set up. The arrow μ in the upper direction in No. 21A indicates the traveling direction of light, and the drive pressure to perform the function of the light shutter is transparent (51+6). The voltage is applied in the thickness direction of the solid flat plate (4) through the solid plate (4). Since this direction is almost the same as the traveling direction of light, it is called the longitudinal effect of the light beam, and the case where the 'cush' W makes a mark θi along the surface vc of the solid flat plate (4) is called the longitudinal effect. This is called the "magnetic effect" because the field direction intersects approximately 100 degrees with the original transmission direction.

The reason why lateral young fruits are not used in the display board of the present invention is as follows. As typified by the case of PLZ'l', the positive and negative combs, M, are provided on the surface of the main plane of the solid flat plate (4), and the horizontal effect f@ is produced. However, in the usage method shown in Figure 4S1, the comb-shaped shadows appear to the human eye and impede accurate reading of the index. This is because it causes a folding effect and gives a similar disturbance to the human CI's eyes.The reason why the ratio shutter element, 2) shown in Fig. 4g2 is made to look closely at the index plate (1) is also due to the PL.
This is typified by the case of Zr, because the substrate [solid flat plate (4)] of the optical shutter element and 2) can have a shape, and the distance from the index plate (1) to the ridge line is When separated, the light based on the above-mentioned paper effect on the friendship between people gives an accurate view of the political indicators g″fvj.Therefore, a more specific vc is the second
In the figure, the polarized light +M (8) on the light output side may or may not be provided.
l) It must be firmly attached at a distance of at most one side fence from the surface.

As stated above, the display board for the uninvented visual power measuring device is
It is possible to implement C-husband, and can solve all the problems between teachers, solid dIt, quick response of Qi-light effect and light transmittance depending on the pressure of the display. As a board, it has the advantageous effect of being able to change the brightness continuously and in a daifuku manner, and also making it possible to perform illumination continuously or in short fixed cycles.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention; FIG. 1 is a sectional view of a display panel, and FIG. 2 is an enlarged sectional view of a light shutter element. (1)... Index plate, +2)... Optical shutter element,
4)... itself is a flat plate, -5) +6)... transparent di
fM, +7) +8)...Polarizing plate agent
Hiromoto - Hiroshi

Claims (1)

[Claims] 1. A 1 ml transparent film was placed on the entire surface of the front and back parts of the solid flat plate that corresponded to the inkstones of the main flat circle, and an electric field was applied in the thickness direction of the solid flat plate through the transparent electrodes on the front and back sides. An optical shutter element that utilizes the vertical effect applied, and a gl whose main plane side that can transmit light is attached to the surface of the index plate VC.
Display board for ability measuring device.