JPS58143388A - Numerical display - 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 that displays a divisor value measured at regular intervals as an area display using a bar graph. The present invention relates to a count value display device configured to display the autopsy value in a display format different from a normal display format.

The applicant of the present application filed an application on January 30, 1981 [liquid crystal display element 1, guest-host type liquid crystal cell using field-effect twisted nematic liquid crystal and dichroic dye and specific direction component] (3) A liquid crystal display device consisting of a combination of a light coloring member that colors only polarized light has a liquid crystal display device in which the incident light entering the liquid crystal cell becomes elliptically polarized due to the birefringence effect, so that the liquid crystal and the pigment maintain almost alignment. an effective value voltage lower than the effective value of the threshold voltage; an effective value voltage higher than the threshold voltage and lower than the effective value of the saturation voltage of the liquid crystal, which almost eliminates the polarization axis of the incident light;
By applying a drive voltage that selectively generates three types of effective value voltages higher than the effective value of the saturation voltage, the liquid crystal display element can display at least three types of voltages.
This indicates that the display operation is performed by changing the color of the image.

This invention was conceived based on the above-mentioned earlier application, and is based on the above-mentioned prior application. (4) The measured values are expressed in bar graphs as area displays, and when receiving arbitrary signals generated in accordance with specific conditions in which the measurement situation has changed, the liquid crystal display element of the display section is displayed. The color of the specific part changes to a color different from the normal time, and the normal display form and the different display form are simultaneously generated in parallel to display the count value and give an instruction. The purpose of the present invention is to provide a counting display device that also reports conditions and indicates the number of coated fish.

In Figure 8, 1 and 2 are substrates each made of a transparent glass plate, and 3 is a group of segment electrodes on which a transparent conductive film, such as an ITO film, is deposited with a film thickness of 500 to 3000 Å by electron beam evaporation, and a plurality of strip-shaped electrodes are formed. segment electrode 3a,
3b, 3c,...

The pattern is formed by chemical etching so that the segment electrodes 3a to 3- are each divided into upper and lower halves, and each division of the segment electrodes 3a to 3 is as follows. -17. (Nl
When explaining l, add ['1, and when explaining the lower side, add [1. Reference numeral 4 denotes a common electrode on which a transparent conductive film, such as an ITO film, is deposited to a thickness of 500 to 3000 Å by electron beam evaporation, and is provided facing the segment electrode group 3. And the segment electrodes 3a~
39 and 3a to 3- and one end of the common electrode 4 extend to the end of the forming substrate for connection to an external drive circuit. 1
, 2 is sealed at its periphery with a spacer 5 so as to maintain a spacing of 10 to 30 μm, and a liquid crystal 7 having optical rotation and containing 1 to 3% dichroic dye 6 is sealed within this sealed space. This liquid crystal 7 has a dielectric anisotropy of ir, t 1F, and the distribution of the center of gravity of the molecules is spatially
However, the t The absorption spectrum of dichroic dye 6 strongly depends on the angle between the long sleeve of the dye molecule and the vibration direction of the incident polarized light. A specific color, for example the wavelength in Figure 2 - Transmission
Wavelength 500 to 6 (10 □
A P-type dichroic dye (BDH Chemicals Ltd product number D77) that absorbs only the green light of - and produces a purple display color is used, and this dye 6 is regarded as the guest and the liquid crystal 7 as the host. Utilizing the fact that the molecules of the liquid crystal 7 change their arrangement due to the generation of an electric field (1), a guest-host type liquid crystal cell 8 is constructed which changes the color of the passing light by changing the molecular arrangement of the dye 6. On the front side of 8 is a color polarizing plate 9 which serves both as a light coloring member and a polarizing plate for coloring light with a color L different from the absorption spectrum of the dye 6, that is, the color colored by the dye 6, for example, red. It is attached so that it is 90 degrees deviated from the alignment direction of the liquid crystal 7, etc. located near the inner surface of the substrate 1 where the absorption axis is in contact with it, and a neutral polarizing plate 10 is attached to the rear surface of the liquid crystal cell S. The liquid crystal display element 11 is illuminated with a color different from the color colored by the dye 6Δ or the color polarizing plate 9, which is aligned with the molecular alignment direction of the liquid crystal 7 and the like located near the inner surface of the substrate 2 in contact with the liquid crystal display element 11. For example, the light source has an electroluminescent color as shown by the wavelength-emission intensity characteristic curve B in FIG. 2 (8).An electroluminescent element 13 that emits light is arranged.

FIG. 3 is a simple diagram showing the relationship between the segment electrode group 3 and the common electrode 4 of the liquid crystal display element 11 in FIG.
' and 3a'' to 3- and the common electrode 4 are connected to an external drive circuit 14 that performs static drive, but the common electrode 4 is always at ground level.In addition, 15 inputs the count value to be measured. 16 is a signal generation unit that outputs an arbitrary signal according to specific conditions; 17 is a detection unit 15
A control unit that issues a command to the external drive circuit 14 to change the drive voltage according to the input signal from the signal generation unit 16,
The above is the main configuration of the count value display device.

Next, the principle of operation of the above configuration will be explained.

I Normal Display Theory 11 Externally, the drive circuit 14c selectively applies waveform pulse drive voltages as seen in FIGS. 4a, b, and c to the segment electrodes 4a to 4. Here, Fig. 4a.

wave, the amplitude of each rectangular width is V 1J' V if J
V, a・ba, △ effective value Va, Vl) of each rectangular wave, V'C is Va-vI
, Vb-■, VC・-■3.

The effective value of the threshold voltage of the liquid crystal display element 11 having the above configuration is vth, the effective value of the saturation voltage is VS, and Va<Vth<
When Vb<Vs<Vc vi, -s'v-;-, the voltage shown in FIG. Since the liquid crystal 7 is lower in temperature, the liquid crystal 7 maintains its initial molecular alignment, and the green light from the electroluminescent element 13 that has advanced from the rear is polarized in one direction by the neutral polarizing plate 10 and enters the liquid crystal cell 8, resulting in the axial rotation effect of the liquid crystal 7. by 90
However, at this time, this incident light cannot pass through the liquid crystal cell 8 because it is absorbed by the absorption characteristics of the dye 6, and the segment portion becomes black and is perceived by the observer M.

Note that the voltage shown in FIG. 4a may be zero.

Furthermore, in the segment electrode portion to which the voltage shown in FIG. The molecular axis is along the electric field direction, and the rotation of the polarization axis of the incident light is reduced by the amount along the electric field, and the optical axis of the liquid crystal 7 and the (11) polarization +llll11 direction of the incident light are different, resulting in a birefringence effect. The linearly polarized light becomes elliptical polarized light, and therefore the absorption effect by the dye 6, which changes its molecular arrangement following the liquid crystal 7, is alleviated, and the polarized light that passes through this portion is polarized by the neutral polarizing plate 1.
The color green immediately before entering the liquid crystal cell 8 through 0 and the polarization axis rotates at an angle smaller than 90 degrees and reaches the color polarizing plate 9, but the polarization axis of the polarized light and the absorption axis of the color polarizing plate 19 The off-center polarized light passes through as an almost green color, and the segment electrode portion becomes green, which is recognized by the observer M.

Therefore, a pulse drive voltage having a waveform as shown in FIG. , in response to the output of the detection unit 15, the control unit 17 changes the display state so that only the range of the liquid crystal light (12) hydrogen element 11 is displayed in accordance with the divisor value, and the range of [II/] is in the non-display state. Segment electricity within the range that should be $ 3 a, 3 b K
H'.

If the control unit 17 instructs the external drive circuit 14 to apply the voltage shown in FIG. The electrodes 3a and 3b are red, and the segment electrodes 3c to 3, which are in the range that should be in the non-display state, are green (see Figure 5a).After that, the display changes to red according to changes in the counted values measured. The ratio of the area of the state range to the green non-display state range changes to display the counted value in a bar graph manner.

Note that the display state range and the non-display state range may be determined by changing the red and green colors, or by distinguishing between black and red or black and green in combination with the voltages shown in FIG. 4a.

11 Display when an arbitrary signal is generated 1rtj, tnIf the running speed of a motor vehicle or motorcycle exceeds the specified speed, or if it shifts to overdrive, or 1 indicates that the measured frequency has increased above a certain value. When the signal generator 16 generates an arbitrary signal in accordance with specific conditions, the controller 17 controls the segment electrodes 3a to 3a.
Applying the voltage shown in Figure 4 only to the lower side 3a to 3-'' of 3,
On the upper side 3a' to 3-', segment electrodes 3a', which are in the range that should be in the display state according to the divisor value, are as before.
If the external drive circuit 14 is instructed to apply the voltages shown in FIG. 4 to the segment electrodes 3c' to 3-' in the range to be in the non-display state in C1 of FIG. - of the segment electrodes 3a, 3b in the range that should be
Only the 4- side 3al', 3b' portions are red, the segment electrodes in the range that should be hidden) and the upper part of the electrodes 3c to 3- (++ll 3c' to 3n' portions and the segment electrodes 3a to 3 The lower part 3a to 3... of this area becomes green (see Figure 5), and the upper part is displayed in a display format in which the ratio of red and green area changes according to changes in the measured count value. At the same time, the entire lower part takes on a green display form.

Incidentally, as in 1 above, the display state range and non-display state range may be changed from the red and green, and may be distinguished from black and red or green by matching the voltages shown in Figure 4a. Good too.

II When an arbitrary signal is generated, other display segment electrodes 3a and 3b are red (segment) 3
c = -3 Before each part is displayed in green (15
) In the arrangement state, when the above-mentioned 11 arbitrary signals are generated, the control unit 17 controls the segment electrodes 3c to 3- for the increase in the range to be displayed after the generation of the arbitrary signal.
- side 3c' to 3-' have the red part increased as before (tllll 3c'' to 3-'', the part corresponding to the increase described above, e.g. 3c', 3d
If the external drive circuit 14 is instructed to apply the voltage shown in FIG.
The parts a' to 3 d' are red, the other upper parts 3 e' to 3 are green, and the lower parts 3a and 3b are red, the same (
3c'', 3d'' parts (d black, same (3e''' to 31 parts each change to green (see Figure 5 C), and the G side remains red as before depending on the change in the measured count value) The display format (16) in which the proportion of the green area changes is continued, and the lower A01; indicates the proportion of the count value before and after the generation of the arbitrary signal, and also displays the occurrence of a specific condition at the same time.

Note that the combination of colors for displaying each of the portions can be changed.

By the way, since the liquid crystal 7 in the part where the segment electrode group 3 and the common electrode 4 are not facing each other maintains the initial molecular arrangement,
Polarized light passing through this area is absorbed by the dye 6, and the area turns black, but it acts as a ruled line or joint.
It has the function of making the division between each opposing point clear. however,
It is omitted in the diagram for explaining the display form in FIG.

As configured as above, this count value display device differs from the normal display form and the display form when the measurement state changes/receives arbitrary signals generated in accordance with specific conditions. A display device that not only displays the count value but also notifies specific conditions using a single display element without adding any other former residence notification means can be obtained, and a complex display format can be obtained.

Fortunately, each voltage waveform applied to each electrode can be obtained from a commercially available CVCi for driving liquid crystals, and the drive circuit is not extremely complicated or expensive compared to conventional ones, and is relatively simple. It can be easily manufactured.

However, since it uses a liquid crystal display element, the thickness of the display part can be small, and the power consumption is extremely low compared to other display elements, resulting in a thin and compact device with a long life. You can expect it.

Of course, the colors of the dye, color polarizing plate, and light source are limited to purple, red, and green, respectively. It is also possible to use a dynamic drive system in which the common electrode is not divided into two but is divided downward into two to form a 7-trix structure.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part explaining the structure of the display section of the count value display device of the present invention, and FIG. 2 shows the wavelength-transmittance of the liquid crystal display element used in the display section and the wavelength of the electroluminescent element. -Characteristics of light emission intensity; Figure 3 is a simplified diagram of the segment electrode group and common electrode of the liquid crystal display element used in the above display; Figure 4 is a diagram illustrating the operation of the above display. FIG. 5 is a plan view illustrating the display form of the display section. ■、2. Substrate 3,4゛ electrode, electrode 5'' spacer
6 Dye 7: Liquid crystal 8. Liquid crystal cell 9゛Color polarizing plate River: Neutral polarizing plate 11 Liquid crystal display element 14. External drive circuit--1\ Output 11X
':2. (, [゛) r-111 no-- 2 Sun Heng 擢 Double 4th figure ζ Sui force 0 4 Figure play Gong Black Oil Japan I oil

Claims (1)

[Scope of Claims] A guest-host type liquid crystal cell in which a field-effect twisted nematic liquid crystal and a dichroic dye are sealed between opposing transparent electrode substrates; , a photo-coloring part that colors only polarized light that is 90 degrees deviated from the molecular alignment direction of the liquid crystal and dye located near the inner surface of the one substrate, and △ attached to the outer surface of the other substrate of the liquid crystal cell. , a liquid crystal display element is constituted by a neutral polarizing plate that transmits polarized light parallel to the molecular alignment direction of the liquid crystal and dye located near the inner surface of the other substrate, and the incident light entering the liquid crystal cell is elliptical due to the birefringence effect. The effective value voltage is lower than the effective value of the threshold voltage of the liquid crystal to be polarized, while the effective value of the saturation voltage of the liquid crystal is higher than the effective value of the threshold voltage and the rotation of the polarization axis of the incident light disappears. Connect an external drive circuit that applies a drive voltage that selectively generates three types of effective value voltages, ie, an effective value voltage lower than the effective value of the saturation voltage, and an effective value voltage higher than the effective value of the saturation voltage. The counted value measured in , under normal conditions, is displayed in a display format that selectively uses two of the three types of effective value voltages and displays the area in the form of a bar graph on the liquid crystal display element, and under specific conditions. When the signal generator generates an arbitrary signal due to the transition of
A display mode in which the color of a specific portion of the liquid crystal display element is changed to a color different from the normal color by selectively using a type of display is generated in parallel and simultaneously with the normal display mode, and the counted value is displayed as a bar graph. A count value display device characterized by displaying an area.