JPH0627247U - Shading device with directional grill - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a light-shielding device which is installed in an automobile or the like so that the occupants thereof are appropriately kept in the solar radiation state and the sunlight is not hindering driving, etc. It is an object of the present invention to provide a directional grill that allows the entry of light on the front surface of the solar cell so as to avoid light shielding when the occupant is not dazzling. A liquid crystal panel 2 capable of shifting to a desired light-shielded state by supplying a current of a predetermined amount or more, and a solar battery type power supply unit 3 provided adjacent to the liquid crystal panel 2 and capable of supplying a current to the liquid crystal panel 2. In addition, the light receiving section of the power supply section 3 is provided with a directional grill 6 that allows light to enter from a direction within a predetermined range.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a light-shielding device that is installed in an automobile or the like so that the occupants of the automobile are appropriately kept in a solar radiation state and the sunlight does not hinder driving or the like.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, automobiles and the like are equipped with a light-shielding device, a so-called sun visor, so that sunlight does not hinder driving and the like. As shown in the schematic perspective view of FIG. 6, this is provided in the upper part of the windshield 1 so as to correspond to the driver's seat and the passenger's seat, respectively. A plate 21 is provided so as to be capable of rotating and rocking in the front-rear direction about the upper edge.

Accordingly, when the sunlight as shown in the schematic diagram of FIG. 7 falls on the eyes of the driver, the light-shielding plate 21 protects the eyes and avoids a dazzling state. By the way, recently, a technique for forming such a light-shielding plate with a liquid crystal panel has been provided, which has, for example, the following circuit diagram configuration. That is, the light-shielding plate composed of a liquid crystal panel is connected to the power supply unit, and when a required current is supplied from the power supply unit to the light-shielding plate, the light-shielding plate is transparent to a predetermined state by the liquid crystal. Transition to opaque state.

Here, when the power supply unit is equipped with a solar cell, when a dazzling amount of sunlight shines on, the current generated by the shining sunlight is supplied to the light-shielding plate to shield the light. It is possible to shift the plate to an opaque state and automatically realize light shielding.

[0005]

[Problems to be solved by the device]

 By the way, in the above-mentioned shading device, the amount of power generated by the solar cell changes according to the intensity of solar radiation, and the concentration of the liquid crystal panel changes, so that light is shielded to the extent that it is not dazzling. There is such a problem. That is, when the solar radiation increases, the output of the solar cell increases and the light shielding plate automatically shifts to the light shielding state even if the driver does not feel dazzling because the sun is at a high position.

[0006] Therefore, when the occupant does not tolerate the obstruction of the field of view due to the dazzling, the field of view of the occupant is obstructed, resulting in a state in which a feeling of openness cannot be secured. The present invention has been devised in view of such problems, and a directional grill that allows light to enter from a direction within a predetermined range is provided on the front surface of the solar cell to block light when an occupant is not dazzled. It is an object of the present invention to provide a light-shielding device with a directional grill that can avoid the above problem.

[0007]

[Means for Solving the Problems]

 Therefore, the light-shielding device with a directional grill of the present invention is a light-shielding device attached to the upper part of a window glass of a vehicle. A solar cell type power supply unit that is provided adjacent to the liquid crystal panel and can supply current to the liquid crystal panel, and has a directivity that allows light from a predetermined range to enter the light receiving unit of the power supply unit. The feature is that the grill is crowned.

[0008]

[Action]

 In the light-shielding device with a directional grill of the present invention described above, by receiving light from a direction within a predetermined range allowed by the directional grill, a current exceeding a predetermined level is supplied from the power supply unit to the liquid crystal panel, and the liquid crystal panel is It automatically shifts to the required shaded state.

[0009]

【Example】

 A light-shielding device with a directional grill as an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic vertical sectional view showing the structure of a main part, and FIG. 2 is a disassembled perspective view of the main part. 3, FIG. 3 is a schematic perspective view showing another example of the arrangement state, FIG. 4 is a schematic circuit diagram of the light shielding device, and FIG. 5 is a graph showing characteristics of the solar cell. .

As shown in FIG. 1, a light-shielding device S is attached to the inside upper part of a windshield 1 of an automobile. The light-shielding device S includes a liquid crystal panel 2 that can be switched to a desired light-shielding state by supplying a current equal to or more than a predetermined value, and a power supply unit. The power supply unit is required for the liquid crystal panel 2. It is equipped with a solar cell 3 capable of supplying the current.

Here, the solar cell 3 is attached adjacent to the liquid crystal panel 2 via the frame member 5, and the liquid crystal panel 2 is fixed to the roof member 8 via the bracket 7 together with the solar cell 3. The liquid crystal panel 2 and the solar cell 3 may be fixed to the vehicle body side with an adhesive or the like. Further, a directional grill 6 is provided between the outer surface of the solar cell 3 and the inner surface of the windshield 1. This directional grill 6 is formed by arranging a number of elongated thin plates 6A extending in the vehicle width direction in the shape of an armored door. It is configured to block sunlight from entering above 6A. Further, the thin plate 6A is pivotally supported at both ends in the longitudinal direction thereof and is attached so as to be rotatable in the up and down directions. By operating the operation lever 6B, the thin plates 6A are simultaneously connected via the connecting member 9 between the thin plates 6A. The vertical posture can be changed.

As shown in FIGS. 1 and 2, such a directional grill 6 is installed on the solar cell 3 so that the light receiving section of the power supply section can only receive light from a predetermined range. The solar cell 3 with such a directional grill 6 is mounted adjacent to the liquid crystal panel 2. The circuit configuration of this device is basically a configuration in which a liquid crystal panel 2 and a solar cell 3 are connected via a controller 4, as shown in FIG. As a result, when a required current is supplied from the solar cell 3 to the liquid crystal panel 2 under the control of the controller 4, the liquid crystal panel 2 shifts from the transparent state to the predetermined opaque state by the liquid crystal. The power generation characteristics of the solar cell 3 are as shown in FIG.

Since the shading device with a directional grill as an embodiment of the present invention is configured as described above, it operates as follows. First, at the time of insolation from above the vehicle where the occupant does not feel glare, the incident angle A is as shown in FIG. 1, and the sunlight trying to enter the solar cell 3 is reflected by the directional grill 6. It is blocked by the thin plate 6A and is prevented from entering the solar cell 3. As a result, the solar cell 3 does not generate power and the liquid crystal panel 2 is not supplied with current. Therefore, the liquid crystal panel 2 is maintained in a transparent state, and a state in which the occupant is obstructed by the liquid crystal panel 2 to obstruct his or her view is avoided.

When the sun becomes lower than the incident angle B with respect to the automobile, the occupant feels dazzling, but in such a state, the sunlight is not blocked by the thin plate 6A of the directional grill 6 and Enter the battery 3. As a result, the solar cell 3 generates power and outputs the required current, and the liquid crystal panel 2 shifts to the opaque state. The liquid crystal panel 2 as described above shields the light so that the occupant can operate the vehicle without causing any glare.

As shown in FIG. 3, the light-shielding device S with the directional grill configured as described above is mounted on each of the upper ends of the windows 1A, 1B, 1C, 1D of the automobile. May be.

[0016]

[Effect of device]

 As described in detail above, according to the shading device with the directional grill of the present invention, in the shading device attached to the upper part of the window glass of the vehicle, the required shading state is brought about by supplying a predetermined current or more. A liquid crystal panel and a solar cell type power supply unit which is provided adjacent to the liquid crystal panel and can supply a current to the liquid crystal panel. With a simple structure in which a directional grille that allows the entry of light is crowned, when the occupant is dazzling, the light is blocked in the same way as in the past, and the occupant can drive without hindrance and without trouble. When the occupant does not feel dazzling, the light is not shielded, and there is an advantage that it is possible to avoid a situation where the occupant's view is obstructed and the sense of openness cannot be secured.

[Brief description of drawings]

FIG. 1 shows a light-shielding device with a directional grill according to the present invention,
It is a model longitudinal sectional view showing the important section composition.

FIG. 2 is a light-shielding device with a directional grill according to the present invention,
It is an exploded perspective view of the principal part.

FIG. 3 is a block diagram of the shading device with a directional grill of the present invention.
It is a model perspective view which shows the other example of the arrangement state.

FIG. 4 is a schematic circuit diagram of the shading device.

FIG. 5 is a graph showing characteristics of a solar cell.

FIG. 6 is a schematic perspective view of a conventional shading device.

FIG. 7 is a schematic diagram showing an operation of a conventional light shielding device.

[Explanation of symbols]

 1 Front Window Glass 1A to 1D Window Glass 2 Liquid Crystal Panel 3 Solar Cell 4 Controller 5 Frame Member 6 Directional Grill 6A Thin Plate 6B Operating Lever 7 Bracket 8 Roof Member 9 Connecting Material 21 Light Shading Plate S Light Shading Device

Claims (1)

[Scope of utility model registration request] 1. A light-shielding device attached to an upper portion of a window glass of a vehicle, wherein a liquid crystal panel capable of shifting to a desired light-shielding state by supplying a current of a predetermined value or more, and a liquid crystal panel provided adjacent to the liquid crystal panel. A solar cell type power supply unit capable of supplying an electric current to the panel, and the light receiving unit of the power supply unit is provided with a directional grill that allows light to enter from a predetermined range. A shading device with a directional grill.