JPH08221001A - Display part for lcd oscilloscope - Google Patents

Abstract

PURPOSE: To eliminate the need for an observation hood and to enable a user to observe outdoors without being affected by the direction of a main body by providing the rear part of an LCD(liquid crystal display device) with an aperture which is arbitrarily openable and closable by a cover and constituting the device in such a manner that the cover is opened outdoors and natural light is taken in from the rear part of the LCD. CONSTITUTION: The rear part of the LCD is provided with the aperture which is arbitrarily openable and closable by the cover 2. The LCD is usually used in the state of holding the cover 2 closed at the time of using the device indoors. The light of a fluorescent tube 6 for a back light is made to glow indoors from the rear surface of an LCD display module 4 by a filter 5 for guiding and diffusing the light but the cover 2 of the aperture is opened and the display of the LCD is observed by taking the external light from the rear surface of the LCD through the filter 5 at the time of using the device outdoors. The cover 2 of the aperture is made openable and closable by means of, for example, a hinge 10 and is fixed by a stopper 11 at the time of closing the cover. As a result, the observation of waveforms outdoors is made possible without separate prepn. of the hood for observation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in the display section of a digital oscilloscope using an LCD (liquid crystal display) for waveform display.

[0002]

2. Description of the Related Art When an LCD is used for waveform display, it is possible to construct a small and portable digital oscilloscope. For example, the display unit 1 shown in FIG. We have realized a structure that can be closed. However, due to its portability, its use has expanded to maintenance-related purposes intended for outdoor use, and there are many demands for observation under direct sunlight. But L
Since the backlight of CD uses a fluorescent tube, sufficient brightness cannot be obtained and it is almost unobservable. Conventionally, this requirement has been solved by a method in which an observation hood 8 as shown in FIG. 2 of the embodiment is attached to the front surface of the display unit 1 and the observation hole 9 is looked into and observed.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The hood 8 accessory for observation is required, and
Due to the restriction of the method of fixing the observation hood, the main body needs to be in a stable state at the time of measurement, and there is a drawback that the hood comes off, for example, when the measurement is performed while hanging from the shoulder. An object of the present invention is to make it possible to observe outdoors without the need for an observation hood and without being influenced by the direction of the main body.

[0004]

In order to achieve the above object, the present invention provides a rear portion of an LCD with an opening that can be arbitrarily opened and closed by a cover, and opens the cover outdoors to let in natural light from the rear portion of the LCD. It is a thing.

[0005]

As a result, natural light is transmitted from the back of the backlight according to the brightness of the surroundings, and it becomes possible to observe outdoors with sufficient brightness.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a cross-sectional view of the LCD display section viewed from the side. 1
Is a case for protecting the LCD, 2 is a cover for the opening, 3 is L
An antireflection filter on the front of the CD, 4 is an LCD display module, 5 is a backlight light guide filter, and 6 is a backlight fluorescent tube.

Usually, when used indoors, the cover 2 is used in a closed state. Indoors, the filter 5 that guides and diffuses the light of the fluorescent tube 6 for backlight is made to shine from the rear surface of the LCD display module 4, but when used outdoors, the opening cover 2 is opened and external light is passed through the filter 5 to the LCD. Take in from the rear and observe the LCD display.

The cover 2 of the opening is opened and closed by a hinge 10, for example, and is fixed by a stopper 11 when closing. If the inner surface of the opening cover 2 on the LCD side is coated with a metal that easily reflects light, by adjusting the opening angle of the cover 2, the reflection amount of natural light passing through the LCD can be adjusted and the brightness can be adjusted.

[0009]

As a result, it becomes possible to observe waveforms outdoors without preparing a separate observation hood, and the portability of the digital oscilloscope using the LCD display can be effectively utilized.

[Brief description of drawings]

FIG. 1 is a sectional view showing a structure of a main part of the present invention.

FIG. 2 is an external perspective view of a conventional example.

[Explanation of symbols]

 1 LCD protective case 2 Opening cover 3 LCD anti-reflection filter 4 LCD display module 5 Backlight light guide filter 6 Backlight fluorescent tube 7 Digital oscilloscope body 8 Observation hood 9 Peephole 10 Opening / closing opening cover Hinge 11 Stopper for opening cover

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location G02F 1/1335 530 G02F 1/1335 530

Claims (1)

[Claims] 1. A digital oscilloscope using an LCD (liquid crystal display device) as a display means, wherein the LCD panel, a backlight filter on the back of the LCD panel, and an opening of the same size as the display section on the back of the LCD panel. A display unit for an LCD oscilloscope, which is provided with a cover which is opened and closed arbitrarily in the opening.