JPH05288799A - Environment testing device with normal temperature chamber for installing driver - Google Patents

Abstract

PURPOSE:To install a driver under specified normal temperatures and then execute an accurate test by installing an object to be tested in a test bath and an electrical driver within a normal temperature chamber and then forming the object to be tested and the drive so that they can be connected by a short wire. CONSTITUTION:A driver 3 of an LCD panel 4 is provided within a normal temperature chamber 2 and is connected to a power supply outside a test bath 1 by wiring L the driver 3. The panel 4 is provided at the front of a door 21 of the normal temperature chamber 2 and is wired L to the driver 3 within the corresponding normal temperature chamber 2 through a cable hole 21a of the door 21. Therefore, the panel 4 within the test bath 1 is maintained to be at a specified temperature and humidity, at the same time temperature within the normal temperature chamber 2 where the driver 3 is located is maintained at normal temperatures, current and signal are fed to the panel 4 from the driver 3, and then it is operated and environmental resistance of the panel 4 is tested. Since toe driver 3 is installed under specified normal temperatures, a test can be made accurately.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an environment test device for testing environment resistance by exposing an object to be tested such as electric and electronic devices and parts thereof to a predetermined temperature or temperature and humidity.

[0002]

2. Description of the Related Art Environmental tests for DUTs such as electric and electronic devices and their parts are performed not only by exposing the DUTs to a predetermined temperature or temperature and humidity, but also by energizing them or applying signals to them. It is common to do so. Taking a liquid crystal display panel (hereinafter referred to as “LCD panel”) as an example, as shown in FIG. 5, an LCD panel 92 is housed and installed in a test tank 91 that can be maintained at a predetermined temperature or temperature and humidity. An electric driver 93 and a power source 94 arranged outside the tank 91 are connected to the panel 92, whereby an environment resistance test is performed while displaying an image on each panel 92.

[0003]

However, such a conventional device has the following problems. The LCD panel 92 is wired to the driver 93 corresponding thereto via the cable hole 91a in the wall of the test tank 91. However, when the number of the panels 92 increases, a portion where the wiring between the panel 92 and the driver 93 becomes long occurs. When the wiring is long, noise is added to the wiring to make it difficult for the panel to operate normally, or the LCD panel has a high driving frequency, so that the panel is likely to malfunction. Although it is desirable that the driver 93 is originally placed at a predetermined room temperature in order to ensure the accuracy of the test, the driver 93 is placed in the environment outside the test tank and is affected by the temperature in the conventional device.

Therefore, the present invention is an environmental test apparatus for an object to be tested, such as electric and electronic equipment, parts thereof, etc., to which an electric driver is connected and operated to perform an environmental resistance test. Therefore, the wiring between the device under test and the driver can be made short enough not to interfere with the normal operation of the device under test, and the driver can be installed at a specified room temperature, and the test can be performed accurately. It is an object of the present invention to provide an environment test device with a room temperature room for driver installation that can be performed.

[0005]

According to the above-mentioned object, the present invention provides a test tank which can be maintained at a constant temperature or a constant temperature and humidity,
A normal temperature chamber for installing a driver which can be maintained at a predetermined normal temperature, and the test tank and the normal temperature chamber are connected to the test object in the test tank and to the test object in the normal temperature chamber by wiring. With a room temperature room for driver installation, formed so that the electric driver and the corresponding electric driver can be connected and housed so that they can be connected with a short wiring that does not interfere with the normal operation of the object. An environmental test device is provided.

[0006]

According to the environment testing apparatus of the present invention, the DUT is housed and installed in the test tank. The driver of the DUT is installed in the room at room temperature. A power source is appropriately connected to the driver. Each DUT is connected to a corresponding driver by a short wiring which enables the DUT to operate normally.

Thus, each DUT is exposed to a predetermined temperature or temperature and humidity while being driven by the driver, and undergoes an environmental resistance test.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment, FIG. 1 is a sectional view seen from the front side, and FIG. 2 is a sectional view seen from the side. This environmental test apparatus is a constant temperature and constant humidity test apparatus, and includes a test tank 1 and a room temperature room 2 for installing a driver provided therein.

The test tank 1 is surrounded by a heat insulating wall, and its front side can be opened and closed by a heat insulating door 11. A portion behind the room temperature chamber 2 in the test tank 1 is an air conditioner 12, where a humidifier 13 and a cooler 1 are sequentially arranged from bottom to top.
4, a heater 15 and an air circulation fan 16 are arranged. The air adjusted to a predetermined temperature and humidity in the air conditioner 12 is blown from the outlet 17 through the upper side of the room temperature room 2 to the front side thereof by the fan 16 and again passes through the lower side of the room temperature room 2 to suck air. It circulates so as to be sucked into the air conditioning unit 12 from the mouth 18.

The room temperature chamber 2 is surrounded by a heat insulating wall, and the front side thereof is opened and closed by a heat insulating door 21. One side of the room temperature chamber 2 is in contact with the inner wall surface of the test tank 1, and the air conditioner 24 is connected to the outer surface of the test tank through an air outlet 22 and an air inlet 23 provided in the contact portion.
Is in communication with. A heater 25, a cooler 26, and an air circulation fan 27 are sequentially arranged in the air conditioning unit 24 from top to bottom, and the fan 27 faces the air outlet 22. Further, a partition plate 28 that divides the inside into upper and lower parts is provided in the room temperature room 2.

The air conditioner 24 has a predetermined room temperature (25 ° C. in this example).
The room temperature air obtained here is blown out from the air outlet 22 into the room temperature chamber 2 by the rotation of the fan 27, and further below the partition plate 28 to the side of the plate. Through the air suction port 23 and circulates so as to be sucked into the air conditioning unit 24. Thus, the room temperature chamber 2 is maintained at a predetermined room temperature.

An object to be tested (in this example, an LCD
A plurality of drivers 3 of the panel 4) are installed, and each driver is connected to the power source 4 outside the test tank 1 via the wiring 31. The wiring 31 passes through the cable hole 31a provided on the side wall of the room temperature chamber 2 and the cable hole 31b provided on the side wall of the test tank 1 correspondingly. Also, the door 2 of the room temperature room 2
A plurality of LCD panels 4 can be attached to the front surface of 1, and a plurality of panels 4 are installed on the door. Each panel 4 is wired to the corresponding driver 3 in the room at room temperature through the cable hole 21a of the door 21. The length of each wiring L is limited to 30 cm or less.

Thus, the LCD panel 4 in the test tank 1 is maintained at a predetermined temperature and humidity, and the room temperature room 2 having the driver 3 is maintained at a predetermined room temperature, and each LC
It is possible to conduct an environment resistance test of the D panel 4 while operating the D panel 4 by energizing the D panel 3 or applying a signal thereto. Next, the embodiment shown in FIGS. 3 and 4 will be described. FIG. 3 is a sectional view of the embodiment as seen from the front surface side, and FIG. 4 is a sectional view of the embodiment as seen from the side surface side.

This environmental test apparatus is also a constant temperature and constant humidity test apparatus, and includes a test tank 5 and a driver-installed room temperature chamber 6 connected behind it. The periphery of the test tank 5 is surrounded by a heat insulating wall, and the front side of the test tank 5 can be opened and closed by a heat insulating door 51. The test tank 5 has an air conditioning unit 52 on one side inside thereof, and in the air conditioning unit, a humidifier 53, a cooler 54, a heater 55, and an air circulation fan 56 are sequentially installed from bottom to top. The air having a predetermined temperature and humidity obtained in this air conditioner is blown out from the air outlet 57 and circulates so as to return from the air inlet 58 to the air conditioner 52 again. In the test object installation area of the test tank 5, a plurality of LCD panels 4 are installed as test objects in this example.

On the other hand, the room temperature room 6 has an air conditioner 61 inside, and in the air conditioner, a cooler 62, a heater 63, and an air circulation fan 64 are sequentially installed from bottom to top. A predetermined room temperature (25 in this example) in the air-conditioning unit 61
Air of (° C. ± 7 ° C.) can be obtained, and the room temperature air obtained here is blown out from the air blowing port 65, and circulates so as to return from the air suction port 66 back into the air conditioning unit 61.
A plurality of drivers 3 for the LCD panel 4 are installed in the front area of the air conditioner 61. Each driver 3 is supplied with power from a power source (not shown) provided outside the room temperature room 6.

The LCD panel 4 installed in the test tank 51 is connected to the driver 3 corresponding to the LCD panel 4 by the wiring L through the cable hole 51a in the rear wall of the test tank 51. Each wiring L
Has a length of 30 cm or less. According to the apparatus described above, the inside of the test tank 51 is controlled to have a predetermined temperature and humidity, whereby each LCD panel 4 is exposed to the temperature and humidity atmosphere. On the other hand, the inside of the room temperature chamber 6 is maintained at a predetermined room temperature, and the driver 3 is exposed to the room temperature atmosphere. Thus, each LCD panel 4 is operated while being energized and given a signal from the corresponding driver 3, and the environment resistance test is performed in that state.

In any of the embodiments described above, the LCD panel 4 as the DUT is connected to the corresponding driver 3 by the short wiring L, so that there is no risk of noise on the wiring L and the wiring L Therefore, each panel 4 is tested in a state where it can operate normally even if the driving frequency of the panel 4 is high. In this way, the wiring L connecting each LCD panel 4 and the driver 3 is short enough not to prevent the normal operation of the panel, and the driver 3 is placed at a predetermined normal temperature, so that the test can be accurately performed as a whole. Can be implemented.

[0018]

As described above, according to the present invention, an object to be tested, such as electric equipment, electronic equipment, parts thereof, etc., for which an environmental resistance test is to be performed while operating by connecting an electric driver thereto. The target environmental testing device, the wiring between the DUT and the driver can be short enough not to interfere with the normal operation of the DUT, and the driver can be installed at a predetermined room temperature. Thus, it is possible to provide an environment test device with a room temperature room for driver installation, which can perform the test as accurately as that.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of one embodiment of the present invention viewed from the front side.

FIG. 2 is a cross-sectional view of the embodiment shown in FIG. 1 viewed from the side surface side.

FIG. 3 is a sectional view of another embodiment of the present invention viewed from the front side.

4 is a cross-sectional view of the embodiment shown in FIG. 3 viewed from the side surface side.

FIG. 5 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1, 5 Test tank 2, 6 Room temperature room for driver installation 3 Driver 4 LCD panel L wiring

Claims (1)

[Claims] 1. A test tank which can be maintained at a constant temperature or a constant temperature and a constant temperature, and a driver installation room temperature room which can be maintained at a predetermined room temperature, wherein the test tank and the room temperature room are the test tanks. A test object inside, an electric driver wire-connected to the test object inside the room temperature room, and a short wiring that does not interfere with the normal operation of the test object and the corresponding electric driver. Environmental test equipment with a room temperature room for driver installation that is formed so that it can be housed and installed so that it can be connected.