JPS591983B2 - Electric power panel toy Oscilloscope touch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oscilloscope or synchroscope that displays observed waveforms on an electro-optical display panel capable of matrix display.

Conventional oscilloscopes or synchroscopes use cathode ray tubes to display observed waveforms, so the depth and length of the casing is inevitably long in terms of appearance.
In addition, since a high-voltage power source for operating the cathode ray tube was indispensable, it was heavy, and compared to various measuring instruments, it had many defects that made it undesirable in practice, such as relatively high power consumption. In particular, it has been extremely difficult for engineers who often travel to various locations to carry out repairs in the field of radio and television services to carry an oscilloscope or synchroscope with them on a daily basis. The present invention has been made in view of the above, and uses an electro-optical display panel capable of matrix display that consumes less power and operates at low voltage, and is an ultra-thin and lightweight oscilloscope or synchroscope with an external appearance similar to that of a circuit tester. This is what we provide.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to illustrative embodiments.
FIG. 1 shows an example of the appearance of an oscilloscope or synchroscope that displays observed waveforms on an electro-optical display panel capable of matrix display.

A notched display hole 2 is provided on the surface of the casing 1, and the display hole 2
An electro-optical display panel 3 capable of matrix display is disposed on the lower surface of the display panel. Here, the electro-optical display panel 3 capable of matrix display, for example, when performing XY matrix display, has a back base material 31 that is somewhat long in the horizontal direction and a front base material 32 that is somewhat long in the vertical direction, and the front side of the back base material 31 is includes a plurality of horizontally long first thin film electrode groups X0, X2...
... are mounted, and a plurality of longitudinally long second thin film electrode groups Y, Y2, ... are mounted on the back side of the front base material 32. The back base material 31 and the front base material 32 are opposed to each other with a slight distance from each other, and the peripheral portion of the cell formed by overlapping the back base material 31 and the front base material 32 is hermetically sealed.
The cell is filled with an electro-optic material. The electro-optical materials include organic liquid crystals or mixtures of organic liquid crystals, colloidal suspensions of inorganic or organic fine particles dispersed in a solvent, such as those commercially available under the trade name Ballard, and electrophoretic pigment particles. A colloidal liquid in which a substance is dispersed in a solvent, an electrochromic substance that reversibly changes color due to an electric field, etc. can be used.

For example, when a cell is filled with an organic liquid crystal or a mixture of organic liquid crystals, a liquid crystal display panel is formed, and when a colloidal liquid in which electrophoretic pigment particles are dispersed in a solvent is filled into a cell, an electrophoretic display is formed. When a panel is constructed and an electrochromic substance is filled in the cells, an electrochemical chromic display panel can be constructed.
Display devices using these electro-optical display panels are of the transmission type, which displays an optical image by installing a diffused light source on the back side of the panel, and the transmission type, which displays an optical image by installing a diffused light source on the front side of the panel. It can be roughly divided into reflective types that allow display.

In particular, in the case of liquid crystal display panels, they are roughly divided into current effect type (dynamic scattering effect type) and field effect type, depending on the type of organic liquid crystal filled in the cell and its optical behavior. A pair of polarizing plates are disposed on the front side and/or the back side of an electro-optical display panel to display an optical image. As will be described later, an IC 33 for selectively driving the thin film electrodes Xl, X2, etc. is provided at the right end of the back substrate 31.
is attached to the lower end of the front substrate 32, and an IC 34 for selectively driving the thin film electrodes Yl, Y2, . . . is attached.

Note that when the electro-optical display panel 3 is of a transmissive type for display, a horizontally long optical window 4, for example, is provided on the back side of the electro-optic display panel 3 in a transverse direction so as to illuminate the back side of the electro-optic display panel 3. It is better to make it . FIG. 2 shows an example of a transmission type display in which a light window is provided laterally on the back side of an electro-optical display panel.

Half mirrors 5 are arranged in parallel on the back side of the electro-optical display panel 3a, and furthermore, a total reflection mirror 6 is arranged diagonally toward the direction of the optical window 4 on the back side of the half mirror 5. . External illumination light 7 is introduced through the light window 4. This introduced diffused light is reflected by the total reflection mirror 6, further transmitted through the half mirror 5, and illuminates the back side of the electro-optical display panel 3a. Here, since the electro-optic display panel 3a and the half mirror 5 are arranged in parallel in close proximity to each other, the light reflected from the back side of the electro-optic display panel 3a is reflected by the half mirror 5 and returned to the electro-optic display panel 3a. Return to the back side.
If the half mirror 5 were not provided, there would be a wide space between the electro-optic display panel 3a and the total reflection mirror 6, where the mutual distances are partially different, and the optical display displayed on the electro-optic display panel 3a would be The image becomes blurry.
In this way, the half mirror 5 actually moves the source of the diffused light introduced through the optical window 4 to a position close to the back side of the electro-optic display panel 3a, and the observer 8 can see the source of the diffused light that is displayed on the electro-optic display panel 3a. The optical image of the waveform pattern can be clearly viewed directly. Note that when performing transmissive display using an electro-optic display panel, instead of providing a light window to introduce external illumination light, an internal light source (
(not shown) may be provided.

When using an internal light source, it is preferable to arrange a light diffusing plate between the electro-optical display panel and the internal light source. FIG. 3 shows an example of a reflective display using an electro-optic display panel.

A hood 9 is disposed laterally on the front side of the electro-optical display panel 3b. A light window 10 is provided in the hood 9. External irradiation light 11 is introduced through the optical window 10 to irradiate the electro-optical display panel 3b. The observer 12 looks into the electro-optical display panel 3b from a position symmetrical to the hood 9. In this way, the hood 9 blocks light other than the irradiation light introduced through the light window 10, so that the electro-optical display panel 3b
There is no risk of optical halation occurring on the front side of the
The observer 12 can clearly and directly view the waveform pattern light image displayed on the electro-optic display panel 3b.
Note that it is more convenient to carry the hood 9 if it has a bellows shape that is easier to fold than a plate. Further, in the case of a reflective display using an electro-optical display panel, an optical window in the housing is unnecessary. FIG. 4 is an electrical system diagram showing an example of an oscilloscope device that displays observed waveforms on an electro-optical display panel capable of matrix display.

The electric circuit 20 is roughly divided into an X-axis circuit 20a connected to a first electrode group of the electro-optical display panel, and a Y-axis circuit 20b connected to a second electrode group. First, the X-axis circuit 20a
Let's talk about. An input signal S corresponding to the figure to be observed is applied to the voltage level adjustment circuit 21. The output of this voltage level adjustment circuit 21 is inputted to an X-axis address selection circuit 22, and further passed through an X-axis driver circuit 23 to a first thin film electrode group Xl, X2 which is long in the horizontal direction of the electro-optical display panel 3.
It can be added to... Also, the Y-axis circuit 20b will be described.

A sweep circuit 24 that generates a sweep voltage corresponding to the input signal S
The output is inputted to the Y-axis address selection circuit 25, and further passed through the Y-axis driver circuit 26 to the second thin film electrode group Y, Y2, . . .
added to. Note that a part of the input signal S is applied to the sweep circuit 24 via the synchronization circuit 27. Thus, the first electrode group
l, X2... and the second electrode group Yl, Y2...
. . . to display a waveform corresponding to the input signal S by applying a partially different electric field. Note that the X-axis address selection circuit 22, the X-axis driver circuit 23, the Y-axis address selection circuit 25, and the Y-axis driver circuit 26 are attached to the respective electrode ends of the electro-optic display panel 3, as described above.

In this way, an oscilloscope or synchroscope that displays only the waveform corresponding to the input signal must display a scale graduation along with the observed waveform, so that the period and peak value of the observed waveform can be read from the scale graduation. .

FIG. 5 shows an example of an electro-optical display panel that can display a scale as well as a waveform. A striped layer 3 forming a scale pattern on the left inward surface of the one side substrate of the electro-optical display panel, for example, the back substrate 31 which is somewhat elongated in the lateral direction.
5, and on the surface of the striped layer 35, a plurality of horizontally long strip electrodes Xl, X2, etc. are provided with an insulating layer 36 interposed therebetween.
. and a plurality of longitudinally long strip electrodes Yl, Y2... on the right inward surface of the front substrate 32 which is somewhat longitudinally long
...Yi... are provided, and these back base materials 31
and a front base material 32 are made to face each other. FIG. 5 shows an example of a transmission type display in which a scale is provided on the back surface of an electro-optical display panel, and the scale is printed or engraved on the front surface of the half mirror 5.

Although the scale graduation may be formed on the surface of the half mirror 5 in this manner, it is also possible to provide a scale graduation (not shown) near the electro-optical display panel 3. still,
In FIG. 5A, numerals 37 and 38 indicate polarizing plates provided as necessary. As detailed above, the present invention displays observed waveforms using an electro-optical display panel capable of matrix display, and consumes less power than conventional oscilloscopes or synchroscopes, requiring no high-voltage power supply. This makes it possible to provide an ultra-thin and lightweight oscilloscope or synchroscope, which has many uses and is highly useful industrially.

Next, an example of the electrical specifications of the oscilloscope device according to the present invention will be shown.

For example, the power consumption when driving 5 field effect matrix liquid crystal display panels with a display area of 65 x 95 mm is approximately 5 mW, and the power consumption when driving a light scattering type XY matrix liquid crystal display panel with the same display area. Approximately 230
mW. On the other hand, the power consumption of the drive circuit of these XY matrix liquid crystal display panels is about 12.5 mW when the circuit is constructed of C-MOSIC or SOSIC. Therefore, when using a power source consisting of two AA batteries connected in series, displaying using the above field effect type XY matrix liquid crystal display panel lasts approximately 40 hours.
Furthermore, when the above light scattering type XY matrix liquid crystal display panel is used for display, it can be operated continuously for about 14 hours, and the power consumption is much lower than that of conventional devices. In this example, only an electro-optical display panel forming an XY matrix has been described, but the present invention can also be applied to an electro-optical display panel forming a dot matrix.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view showing an example of the device of the present invention, Fig. 2 is a longitudinal cross-sectional view illustrating an example of a transmissive display device using an electro-optic display panel, and Fig. 3 is a longitudinal cross-sectional view showing an example of a transmissive display device using an electro-optic display panel. A vertical cross-sectional view illustrating an example of a reflective display device, FIG. 4 is a system diagram showing an example of an electric circuit for operating the device of the present invention, and FIG. FIG. 5 is a vertical sectional view illustrating another example of a transmission type display device using an electro-optical display panel. 3... Electro-optical display panel, 5... Half mirror 6... Light reflecting mirror.

Claims (1)

[Claims] 1. In an oscilloscope device comprising a transmissive electro-optic display panel and a light reflecting mirror for guiding light on the back surface of the display panel, a half mirror is provided close to the back surface of the electro-optic display panel, An oscilloscope device using an electro-optic display panel, characterized in that an observed waveform displayed on the panel and a scale scale that is optically transmitted together with the electro-optic display panel are displayed clearly and simultaneously.