JPS60253690A - Sun ray controller by liquid crystal - 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 [Field of Application of the Invention] The present invention relates to a solar radiation control device using a liquid crystal for controlling the amount of solar radiation into structures such as buildings, residences, and gymnasiums.

[Background Art] Blinds that are conventionally generally installed on structures are:
The opening/closing operation is complicated, and the opening/closing state of the blinds varies from window to window, which impairs the beauty of the building when viewed from the outside. When the blind is driven by a motor or the like, the structure is complicated and driving noise is generated. Furthermore, if the blinds are opened and closed only on a portion of the windows, sunlight from the unshielded windows may cause disturbances in the air conditioning inside the building.

[Object of the invention] In consideration of the above facts, the present invention does not require special power,
It is an object of the present invention to obtain a solar radiation control device that can perform optimal solar radiation control without generating noise.

[Summary of the Invention] In the solar radiation control device according to the present invention, a liquid crystal plate is provided in the part of the structure through which external light passes, and the control device adjusts the amount of electricity supplied to the liquid crystal plate based on the signal from the solar radiation sensor to adjust the light transmittance. By making these changes, optimal solar radiation control can be performed.

[Embodiment of the invention] As shown in Fig. 1.2, in this embodiment, building 1
A solar radiation control device is installed on the outer wall of 0.

As shown in detail in FIG. 3.4, a glass setting block 16 is installed in the oppositely opening receiving groove 14 of the window frame 12.
is placed on the bottom, and this glass setting block 1
A front glass 18 and an inner glass 20 are fitted onto the glass 6. These front glass 18 and inner glass 20 have their peripheries in contact with the glass setting block 16, and a sealing material 22, 24 is installed between the receiver and the inner surface of the groove, thereby sealing the inside and outside of the building 10. It's shielding. A back-up material 25 is placed between the sealing material 22, 24 and the glass setting block 16.
is mediated.

A liquid crystal plate 26 is sandwiched between the front side glass 18 and the inside glass 20 on which a polarizing plate 35 is arranged. This liquid crystal plate 26 has a transparent electrode 28 and a transparent electrode 30 in contact with the front glass 18 and the inner glass 20.
A molecular alignment layer 32 and a molecular alignment layer 3 are in contact with the transparent electrode 30.
4 are respectively provided, and these molecular orientation layers 3
2. This is a general liquid crystal plate structure in which a TN type liquid crystal layer 36 is sandwiched between molecular alignment layers 34. A sealing material 38 made of polyester, glass, epoxy resin, etc. and also serving as a spacer is placed around the liquid crystal layer 36 and is in contact with the glass setting block to ensure sealing of the liquid crystal layer 36. This liquid crystal plate 26 has a general configuration in which the light transmittance gradually decreases as the voltage applied to the transparent electrodes 28, 30 increases.

A window frame 40 disposed above the window frame 12 is fitted with a single layer of glass 42, unlike the window frame 12. A panel 44 is fixed to the inside of this single-layer glass 42, and a plurality of solar cells 46 are attached to the surface of this panel 44. These solar cells 46 receive sunlight passing through the single-layer glass 42 and generate electricity, which is then sent to the controller 50 via wiring 48. This controller 50 is attached to the ceiling 52, and the power from the solar cell 46 is connected to the transparent electrode 28 of the liquid crystal panel through wiring 54.
, to be sent to the transparent electrode 30.

A single-layer glass 42 is provided above the window frame 40 by a window frame 56.
A single-layer glass 58 similar to the above is attached, and a solar radiation sensor 60 is arranged inside this single-layer glass 58. This solar radiation sensor 60 detects the amount of solar radiation and the solar radiation angle (solar azimuth direction and altitude direction) entering through the single-layer glass 58, and sends its output signal to the arithmetic unit 62 via the wiring 61. This arithmetic device 62 is connected via wiring 65 to an outside air temperature sensor 64 which is attached between the window frame 56 and the window frame 40 and whose portion is exposed to the outside.

Thereby, the arithmetic unit 62 determines which liquid crystal plate of the plurality of liquid crystal plates 26 should be energized and how much electricity should be applied based on the luminous intensity, direction, and amount of solar radiation of the sun. Based on the output of the arithmetic unit 62, the controller 50 controls the amount of current applied to the liquid crystal panel. The liquid crystal panel 26 will be in a blind open state if there is no electricity at night, but this calculation device 62 allows the blinds to be opened not only during the day, but also during the day.
It is also possible to achieve a blinding effect even at night. An auxiliary power source may be used for this case. Further, a manual controller may be used so that the light transmittance of the liquid crystal plate can be arbitrarily adjusted as necessary. For this purpose, it is preferable to arrange the controller 50 near a window sill 66 installed inside the building.

In the solar radiation control device of the present embodiment configured in this way, the liquid crystal plate changes its light transmittance by energization from the controller 50, so by energizing the liquid crystal plate at an appropriate location, the liquid crystal plate that is not energized can be changed. This allows for proper control of the incident light indoors. In particular, when the sunlight is strong, the amount of power generated by the solar cell 46 is large and the light transmittance of the liquid crystal plate 26 is low, resulting in a large blind closing effect.On the other hand, when the sunlight is weak, the generated power is weak and the blind is left open. Therefore, it is convenient.

In addition, in this embodiment, the liquid crystal plate 26 can be individually controlled from the top to the bottom (26A to 26C) according to the solar altitude, and further in the azimuth direction (26E to 26C) according to the sun's direction.
6H) can also be controlled individually. Therefore, it is possible to control the amount of light transmission by applying electricity evenly to a plurality of liquid crystal plates, and it is also possible to control the amount of solar radiation by making only the uppermost liquid crystal plate 26A of the plurality of liquid crystal plates opaque. Further, near sunset, only the liquid crystal panels 26E and 26F facing west can be made opaque to prevent the setting sun from entering the room. Furthermore, the amount of electricity supplied to the liquid crystal panel 26 can be controlled so that the illuminance in the room remains constant regardless of the amount of solar radiation. For this purpose, the illuminance in the room may be measured.

In order to achieve different blinding effects depending on the season, the arithmetic unit 62 can provide an annual calendar in advance, or select appropriate control modes for the summer and intermediate seasons based on information from the outside temperature sensor 64.

In winter, regardless of power generation from the solar cell 46, indoor heating by solar radiation can be promoted without energizing the liquid crystal panel, contributing to a reduction in the heating load on the perimeter area. However, even in the winter, it is possible to control the amount of solar radiation in rooms that require cooling by supplying electricity to the liquid crystal panels, thereby eliminating disturbances in air conditioning.

This type of solar radiation control does not require a special power source, which saves energy and reduces failures. Furthermore, since the amount of solar radiation can be controlled without driving noise from motors, etc., even if the amount of light transmission is frequently controlled, there is little negative effect on indoor work, and a comfortable living environment can be obtained. Furthermore, even when looking at the building from the outside, the light transmittance of the liquid crystal panels in the window portion can be made uniform, which reduces variations in the appearance of the window surfaces and maintains the beautiful appearance of the building.

Note that an auxiliary power source may be supplied to the solar radiation control device to prepare for a failure of the solar cell or to stabilize the operation of the controller 50, the arithmetic device 62, and the like. Furthermore, similar effects can be obtained by using other liquid crystal display systems other than this embodiment.

[Effects of the Invention] As explained above, the solar radiation control device of the present invention is provided with a control device that adjusts the amount of current to the liquid crystal panel based on the signal from the solar radiation sensor, so it does not require special power and does not generate noise. It has an excellent effect of making it possible to appropriately control the amount of light transmission.

[Brief explanation of drawings]

FIG. 1 is a front view of a building showing an embodiment of the solar radiation control device according to the present invention, as seen from the outside, and FIG. 2 is a front view of a building shown in FIG.
Line sectional view, Fig. 3 is a partially enlarged view of Fig. 2, Fig. 4 is a partially enlarged view of Fig. 3.
It is a partially enlarged view of the figure. lO... Building, 12... Window frame, 18- Front side glass, 20- Inner glass, 26... Liquid crystal plate, 28... Transparent electrode, 30... Transparent electrode, 36. ...Liquid crystal layer, 46...Solar cell, 50...φ controller, 60...Solar radiation sensor, 62...Arithmetic unit, 64...Outside temperature sensor. Agent Patent Attorney Atsushi Nakataka Figure 1 Figure 2 Continued from page 1 @ Inventor Hiroharu Shima @ Inventor Bijin Naragi 8-21-1 Ginza, Chuo-ku, Tokyo Tokyo Main Office of Takenaka Corporation

Claims (1)

[Claims] (1) It has a liquid crystal plate that is attached to a structure and changes the light transmittance by applying electricity, a solar radiation sensor that is also attached to the structure, and a control device that adjusts the amount of electricity applied to the liquid crystal plate based on a signal from the solar radiation sensor. Solar radiation control device using liquid crystal.