JP2001027564A - Optical detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make low-cost and thin a local detecting device for light and heat rays and to facilitate its attachment even to a curved object surface. SOLUTION: The optical detecting device 1 is composed of transparent base materials L2 and L2' which are flexible, electrode part L3 and L3' which are composed of electrode groups, and a photosensitive layer L4 which is interposed between both the electrode parts. Then the photosensitive layer L4 is formed of a material which varies in electric resistance value by light irradiation and the electrode groups are formed of light-transmissive materials. When viewed perpendicular to the transparent base materials L2 and L2', the electrode groups constituting the electrode parts are arranged in orthogonal relation or at a specific angle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a technique for local light detection on a flat surface or a curved surface.

[0002]

2. Description of the Related Art Devices for detecting a local (or local) temperature on a flat or curved surface as a measurement object are known. For example, a device such as a thermistor or a thermocouple is applied to the skin surface of a human body. By attaching it, sensory information can be acquired as if it were a hot spot on the skin.

[0003]

However, the conventional apparatus has the following problems.

(1) A large number of sensor modules are required for local temperature and heat detection. For example, a large number of thermistors and thermocouples are provided in individual thermo modules (elements) for temperature detection. This results in high costs and an increase in the size of the device (thickness of the module, etc.).

(2) When the curvature of the surface to be measured is large,
It is difficult to attach the sensor module in a state in which the sensor module is in close contact with the surface.

(3) If it is desired to perform light detection, it is necessary to attach an optical sensor separate from the thermo module, so that the device becomes large-scale (for example, since the skin of the human body reacts to ultraviolet rays, the sensation of the skin is sensed). In order to create a sensor module close to the vessel, it is necessary to design the temperature and heat detection means separately from the light detection means.)

Therefore, the present invention aims to reduce the cost and thickness of a local detecting device for light and heat rays, and to easily attach a curved surface to a target surface even when the target surface is a curved surface. The task is to

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention has the following constructions (a) to (d).

(A) A transparent base material having flexibility, a first electrode portion and a second electrode portion formed by an electrode group,
A structure including a photosensitive layer interposed between the two electrode portions.

(B) The photosensitive layer is formed of a material whose resistance changes when irradiated with light.

(C) The electrode group of the first electrode portion or the second electrode portion is formed of a light transmitting material.

(D) When viewed from a direction perpendicular to the transparent substrate, an electrode group constituting the first electrode section and an electrode group constituting the second electrode section have an arrangement or a predetermined arrangement which is orthogonal to each other. Be placed at an angle.

Therefore, according to the present invention, a plurality of locations where the first electrode group and the second electrode group intersect each other are defined as light detection points when viewed from a direction orthogonal to the transparent base material, and are locally detected. In addition, the electrode group can be formed on a flexible transparent base material, and the shape can be deformed according to the shape of the surface to be measured.

[0014]

FIG. 1 is a sectional view showing the basic structure of a photodetector according to the present invention.

The light detecting device 1 is a device attached to a flat or curved surface to locally detect light radiated on the surface, and has an electrode portion L3 between transparent substrates L2 and L2 '. L
3 'is provided and a photosensitive layer L4 is formed between both electrode portions. In addition, "light" here means
Includes ultraviolet, visible, and infrared light.

The transparent base materials L2 and L2 'having flexibility are made of a material having a high light transmittance and an electric insulating material, such as silicone and vinyl chloride.

The electrode portions L3 and L3 '(hereinafter, one electrode portion L3 is referred to as a "first electrode portion" and the other electrode portion L3'
Is referred to as a “second electrode unit”. ) Is configured to include an electrode group formed of a conductive material.
In FIG. 1, the first electrode portion L3 is formed on the transparent substrate L2 (the electrode L3a of the electrode group extends in the vertical direction on the paper), and the first electrode portion L3 is formed on the transparent substrate L2 '. To form a second electrode portion L3 '(the electrode group L3'a,
L3'a extends in a direction perpendicular to the plane of the paper. ). That is, when viewed from a direction orthogonal to the transparent base materials L2 and L2 ', the electrode group forming the first electrode portion L3 and the electrode group forming the second electrode portion L3' have an orthogonal relationship to each other. They are arranged or intersected at a predetermined angle.

For example, as shown by a solid line in FIG. 2, when viewed from a direction perpendicular to the transparent base materials L2 and L2 '(ie, a normal direction of the electrode forming surface), each of the electrode groups L3a and L3
a,... and L3′a, L3′a,.
It has been. That is, one of the electrode groups L3a, L3a,
... form a column electrode group, and the other electrode groups L3'a, L
3′a,... Form a row electrode group, and “i”,
When "j" is an integer variable, light can be detected near the corresponding intersection position (see "area AR" in the figure) by designating the i-th row and the j-th column.

Regarding the arrangement of the electrode groups, as shown by a dotted line in the figure, even if the electrode groups intersect each other at a predetermined angle (for example, 60 °) (oblique arrangement), there is no difference. I do not care. This is because it may be difficult to adopt the orthogonal arrangement depending on the circumstances of the wiring process.

The first electrode portion L3 or the second electrode portion L
For the electrode group constituting 3 'or both,
It is formed of a light-transmitting material (a material having a high light-transmitting property) so that the light irradiation amount on the photosensitive layer L4 is not reduced by the shielding, and examples thereof include a conductive polymer (polymer). Note that a transparent electric insulator or an electrically insulating fluid (gas or liquid) is used between adjacent electrodes for insulation separation between the electrodes.

The photosensitive layer L4 is interposed between the first electrode portion L3 and the second electrode portion L3 ', and is formed using a material whose electric resistance changes when irradiated with light. The material includes a photoconductive molecule or a photoconductive polymer (organic photoconductors have known structures such as “single-layer type”, “stacked type”, and “microcrystal dispersed type”). There). As a material that reacts to infrared rays, a dielectric phthalocyanine (for example, a laminated photoconductor using a phthalocyanine-based pigment as a carrier generating material and a carrier transporting material compatible with metal phthalocyanine is known) is exemplified. Examples of those which react to ultraviolet light include dielectric carbazole (the one used in a wavelength range of 300 nm or less). In addition, as a material that responds to visible light, there is known a carbazole used in a wavelength region centered at 500 nanometers.

The advantages of using photoconductive molecules for the photosensitive layer L4 are as follows.

The photosensitivity wavelength range can be changed by a doping treatment (for example, a method of dispersing or laminating an electrochemically doped polymer and a dye).

Carriers (current carriers) in response to light irradiation
That the electrical resistance changes according to the light intensity (the amount of absorption).

Easy film formation and low bulk resistance.

In order to increase the elasticity (force) of the photosensitive layer L4 (that is, to facilitate shape deformation), for example, a carbazole mixed with polyvinyl (polyvinyl carbazole: PVK) is mixed with a plasticizer (for example, PVK). , Dioctyl phthalate (DOP), diisononyl phthalate (DINP), etc.) can be changed from a material feeling like foamed styrene to a material feeling like rubber.

In FIG. 1, for convenience of explanation, only one photosensitive layer is used. However, when an apparatus is manufactured using a plurality of photosensitive materials having different wavelength ranges, the following method is available.

(I) Method of using photosensitive materials having different characteristics for each detection point or detection area in one photosensitive layer. (II) Forming a plurality of photosensitive layers and having different characteristics for each layer. How to use.

First, the method (I) uses a material responsive to visible light at a certain place in the same layer and uses a material responsive to infrared rays or ultraviolet rays at another place. Has the advantage that it can be made thinner.

In the method (II), a material that reacts to visible light is used in a certain photosensitive layer, and a material that reacts to infrared light or ultraviolet light is used in another photosensitive layer. That is, in this case, a plurality of electrode portions are arranged between the flexible transparent base materials, and a plurality of photosensitive layers having different wavelength regions of photoreaction are formed between the respective electrode portions. You.

FIG. 3 shows an example of the cross-sectional structure of such an apparatus. The apparatus has a multilayer structure in which a plurality of layers (electrode layers and photosensitive layers) are sandwiched between a transparent substrate L2 and a substrate L2 '. Has become.

For example, as shown enlarged in the great circle of the figure, the A1 layer is formed by an (electric) insulating film formed on a base material L2 such as a transparent film, and the A1 layer on the right side thereof is formed.
The two layers include an electrode L3a made of a conductive polymer and an insulating film L5 for separating the electrode L3a. And A on the right side of A2 layer
The three layers include the photosensitive layer L4 and the insulating film L6 for separating the photosensitive layer L4, and the A2 layer and the A1 layer are repeated on the right side thereof in this order. In other words, in the direction orthogonal to the transparent substrates L2 and L2 ', a layer pattern of A1, A2, A3 (a layer containing a photosensitive material), A2, and A1 (in the figure, the pattern X is repeated two or more times) A sign that means
The layer pattern is described as “(A1A2A3A2) + A1” using “(X) + = XX...”. ) Appears repeatedly.

For example, between the substrate L2 and the substrate L2 ',
When the layer pan is repeated twice, that is, when the layer pattern “A1A2A3A2A1A2A3A2A” is included.
In the case where "1" is included, one of the two A3 layers contains a photosensitive material whose resistance changes in response to visible light, and the other layer responds to infrared or ultraviolet light. And a photosensitive material whose resistance value changes. In the general case where the layer pan is repeated three or more times, any or all of the photosensitive layer that responds to light in the infrared, visible, and ultraviolet regions is formed as necessary. The selection of the wavelength range can be adjusted by the doping amount and the material of the dopant, and is not limited thereto.For example, one photosensitive layer reacts to an infrared region and a visible light region, and another photosensitive layer reacts to an infrared region and a visible light region. Various combinations such as a response to the visible light range and the ultraviolet range are possible, and the range of the wavelength range can be freely selected to some extent.

In the example shown in FIG. 3, the A1 layer serving only as an insulating film is interposed between the A2 layer and the next A2 layer. However, as shown in FIG. 4, this layer is eliminated (transparent substrates L2, L2 ′) And the A2 layer is shared, so that a simple and thin structure can be used. That is, in this case, the pattern in which the A1 layer is formed on the transparent base material L2 and the A2 layer and the A3 layer (the layer containing the photosensitive material) are alternately repeated along the right side of the figure (in the figure, Using the above symbol, this is referred to as “A1 (A2A3) + A2A
1 ". ), A1 layer, transparent substrate L
2 'is arranged.

For example, when the layer pan is repeated twice between the substrates L2 and L2 ',
When the layer pattern “A1A2A3A2A3A2A1” is included, one of the two A3 layers includes a photosensitive material whose resistance value changes in response to visible light, and the other layer includes infrared light. Alternatively, a photosensitive material whose resistance value changes in response to ultraviolet light is included. In the general case where the layer pan is repeated three or more times, any or all of the photosensitive layer that responds to light in the infrared, visible, and ultraviolet regions is formed as necessary.

When light energy is detected as heat, the light intensity detected by a photosensitive layer that reacts to light in the infrared or visible light range, or in the infrared and visible light ranges is calculated as heat information (the energy of the heat ray). Output as quantity information).
That is, information on the amount of heat and the temperature according to the amount of light absorbed by the photosensitive layer can be obtained from the change in the resistance value. This eliminates the need to separately design heat (or temperature) detecting means and light detecting means in separate structures when producing a sensor module close to the sensory organs of the human skin.

In FIGS. 3 and 4, for convenience of explanation and illustration, the direction of formation of the electrodes included in the A2 layer is always the same, but as described above, the formation direction of the electrodes is, for example, the base material L2. , L2 'are arranged in a matrix extending in a lattice shape when viewed from a direction orthogonal to the direction perpendicular to L2'. (That is, the electrodes in one layer are row electrodes and the electrodes in the other layer are column electrodes).

As described above, between the transparent substrates L2 and L2 ', a plurality of electrode layers (A2, A2,...) And a photosensitive layer (A
, A3,...) Can be used to perform local light detection on the surface to be measured in various wavelength ranges.

Next, a description will be given of a photodetector formed by combining a pair of sheet members.

FIGS. 5 and 6 are explanatory views showing the basic structure of the light detecting sheet, and the sheet 1A (light detecting device).
Has a structure suitable for being attached to a flat surface or a curved surface to perform local light detection on the surface.

For example, of a pair of sheet members 2, 2 '(hereinafter, one of them is referred to as "first sheet member" and the other 2' is referred to as "second sheet member"). , First
As shown in FIG. 6, electrode groups 4, 4,... Constituting a first electrode portion are formed on one surface of a transparent substrate 3 of these sheet-like members 2. Are respectively coated with photosensitive materials 5, 5,... Forming a photosensitive layer. The electrode groups 4, 4, ... are parallel electrode groups extending in parallel with each other.

On the other hand, of the transparent base material 3 'of the second sheet-like member 2', a surface facing the first sheet-like member 2 is provided with an electrode group 4 ', 4' constituting a second electrode portion. Are formed, and are respectively covered with photosensitive materials 5 ', 5',... Forming a photosensitive layer.
The electrode groups 4 ', 4', ... are parallel electrode groups extending in parallel with each other.

The sheet members 2, 2 'are arranged such that the surfaces of the transparent substrates 3, 3' on which the electrode groups and the photosensitive portions are formed face each other. 'When viewed from a direction perpendicular to (i.e., a normal direction of the electrode forming surface), a matrix arrangement (orthogonal lattice arrangement) or an oblique lattice arrangement in which mutual electrode groups have an orthogonal relationship. .

FIG. 7 shows a configuration example 6 in which a pair of sheet-like members having an electrode group formed on a film are combined. A row electrode sheet 7 is shown at the center, and the cross-sectional structure is shown on the left side. The column electrode sheet 8 is shown on the right side of the row electrode sheet 7.

In the row electrode sheet 7, a transparent film 9 of polyester or the like is used as a base material, on which electrodes 10, 10,... Parallel to each other are formed. The coating materials 11, 11,... For these electrodes include the photoconductive polymer materials described above.

The column electrode sheet 8 has exactly the same structure as the row electrode sheet 7, and the direction in which the electrodes are formed is selected so as to be perpendicular to the electrodes 10, 10,. Only.

FIG. 8 shows a configuration example 6A in which an insulating film is formed on a film and a pair of sheet-like members having an electrode group formed thereon are combined. A row electrode sheet 7A is provided at the center. The cross-sectional structure is shown on the left side, and the column electrode sheet 8A is shown on the right side of the row electrode sheet 7A.
Is shown.

The base material of the row electrode sheet 7A has a structure in which a light-transmitting electric insulating film 12 (for example, insulating silicone or polymer gel) is formed on a transparent film 9A. After bonding 7A and 8A to each other, the film 9A is removed from the base material.

The electrodes 10A, 10A,... Formed on the electric insulating film 12 are formed using a conductive polymer, and these electrodes are covered with a photoconductive polymer.

The column electrode sheet 8A has exactly the same structure as the row electrode sheet 7A except for the difference in the direction in which the electrodes are formed, and a description thereof will be omitted.

In the above-described example, the electrode group is separated by the coating of the photosensitive material. However, the structure in which the electrically insulating polymer is provided between the electrodes and in the gap between the photosensitive materials is adopted. May be used. This is to increase the resistance to deformation of the sheet and ensure the holding of the photosensitive material.

FIG. 9 shows a configuration example 6B in which a pair of sheet members in which an insulating film is interposed between electrodes and between photosensitive films is combined, and a row electrode sheet 7B is provided at the center.
And the cross-sectional structure is shown on the left side,
The column electrode sheet 8B is shown on the right side of the row electrode sheet 7B.

In the row electrode sheet 7B, electrodes 10B, 10B,... Made of a conductive polymer are formed on the electric insulating film 12A formed on the transparent film 9A. Each electrode is insulated and separated by the intervening films 12B.
Then, the surface of the electrode that is not covered with the electric insulating films 12A and 12B (the surface on the opposite side to the film 9A in the figure) has the photosensitive films 11B, 11B,.
, Respectively, and electrical insulating films 12C, 12C,... Are provided between them.

The column electrode sheet 8B has exactly the same structure as the row electrode sheet 7B except for the difference in the direction in which the electrodes are formed, and a description thereof will be omitted.

In the above example, the photosensitive film covering the electrode group is provided for both the row electrode sheet and the column electrode sheet. However, the thickness is reduced by adopting a configuration in which the electrode group is coated on only one of the electrode sheets. Can be thin. For example, with respect to one of the sheet members facing each other, the second sheet member is formed only on the surface of the base material facing the first sheet member, and the second electrode portion is formed. A structure in which a coating of a photosensitive material is not formed on the electrode group constituting the electrode portion is adopted.

FIG. 10 shows an example of such a configuration 6C, in which a row electrode sheet 7B is shown at the center and its sectional structure is shown on the left side, and a column electrode sheet is shown on the right side of the row electrode sheet 7B. 8C is shown, and its cross-sectional structure is shown below the column electrode sheet 8C.

The structure of the row electrode sheet 7B is as described above, and stretchable photosensitive films 11B, 11B,... Are formed on the surfaces of the electrode groups 10B, 10B,.

On the other hand, the column electrode sheet 8C has a base material in which the electric insulating film 12A is formed on the transparent film 9A, and the electric insulating film 12A has the electrodes 10C, 10C,.
・ Is formed. The electric insulation films 12B, 12B,... Are interposed between these electrodes to insulate each electrode.

The surface of each electrode 10C that is not covered with the electric insulating films 12A and 12B is exposed, and this surface is not covered with a photosensitive material.

That is, when the row electrode sheet 7B and the column electrode sheet 8C are combined, the photosensitive film 11B on the side of the row electrode sheet 7B comes into close contact with each electrode 10C of the column electrode sheet 8C, so that the photosensitive film is exposed between the two sheets. The film 11B is also used.

In the above example, the photosensitive film is formed continuously along the electrode group forming direction, that is, in the row direction and the column direction. However, these may be formed partially on the electrode group. It is possible. That is, the coating with the constituent material (including the photosensitive material) of the photosensitive layer is formed only at the positions where the respective electrodes intersect when viewed from the direction orthogonal to the transparent base material, among the sheet members facing each other. By doing so, the material may be reduced.

FIG. 11 shows such a configuration example 6D, in which a row electrode sheet 7C is shown at the center, the cross-sectional structure is shown on the left side, and a column electrode sheet is shown on the right side of the row electrode sheet 7C. 8C is shown, and its cross-sectional structure is shown below the column electrode sheet 8C.

In the row electrode sheet 7C, elastic photosensitive films 11C, 11C,... Covering the electrodes 10B, 10B,. That is, the electric insulating film 1 is formed on the transparent film 9A.
2A are formed thereon, and electrodes 10B, 10B,... Are formed thereon, and the respective electrodes are separated by an electric insulating film 12B interposed therebetween. And each electrode 1
0B, an elastic photosensitive film 11C is formed on a surface that is not covered with the electrical insulating films 12A and 12B. Each photosensitive film 11C has a substantially square shape (generally, a rectangular shape) when viewed from a direction orthogonal to the sheet. It may be a polygon or a circle.), Which are separated by the electric insulating film 12C.

As for the other column electrode sheet 8C, the electrode 10C is not coated with the photosensitive film as described above.

Therefore, when the row electrode sheet 7C and the column electrode sheet 8C are combined, each photosensitive film 11C separated by the electric insulating film 12C in the row electrode sheet 7C comes into close contact with each electrode 10C of the column electrode sheet 8C. By
The configuration is such that the photosensitive film 11C is shared between both sheets.

When using the above-described photodetector (photodetection sheet), the film or the electric insulating film constituting the transparent substrate is brought into contact with the object to be measured, and the sheet is adjusted to the surface shape of the object. After deforming the shaped member, it is brought into close contact with the surface to be measured.

Then, when a desired electrode of the row electrode sheet and the column electrode sheet, that is, an integer variable i, j is introduced as an index, an electrode corresponding to the i-th row and the j-th column (i. By selecting the first electrode and the j-th electrode of the column electrode sheet), a change in the electrical resistance value of the photosensitive layer can be detected in accordance with the amount of light received (the amount of light absorbed) near the intersection of the electrodes. That is, i in the row electrode sheet
Since the resistance between the nth electrode and the jth electrode in the column electrode sheet is a function of the light intensity at that location, information on the light intensity (including heat information) is calculated back from the resistance value. Can be obtained. Thus, the i-th row and the j-th row
Local light intensity distribution data at a desired position can be obtained by matrix processing of detection data of a column (for example, 1 ≦ i ≦ N, 1 ≦ j ≦ M (N, M
Is a natural number), a matrix of N rows and M columns is obtained, and a change or distribution of light energy or heat can be calculated by selecting a specific range of the matrix. ).

Incidentally, since the photosensitive material coated on the electrode group has a planar spread, local light detection means detection at a "point" in a mathematically strict sense. Not in translation. Therefore, a detection area is formed by a number of hexagonal areas (cells) centered on the respective points at which the electrodes of each sheet member intersect when viewed from a direction orthogonal to the base material. Thus, for example, in the case of performing light detection or heat ray detection on the surface of a body, such as a human body surface, which is generally an irregular surface or a free-form surface, the extension of the electrode accompanying the detection is caused by each hexagon. By being uniformly dispersed and absorbed by the shape regions, it is possible to prevent detection bias and detection errors from occurring.

FIG. 12 conceptually shows the manner of such area division. Horizontal lines hl, hl,... With numbers "1" to "5" are shown in the row electrode sheet. Each of the electrodes (row electrodes) is represented, and vertical lines vl, vl,... With the symbols “A” to “I” represent the respective electrodes (column electrodes) in the column electrode sheet. I have.

A (positive) hexagonal region k indicated by a broken line in the drawing,
.. indicate light detection areas, and in a matrix arrangement of row electrodes and column electrodes, each grid point is a detection point representing a hexagonal area k.
For example, in FIG. 12A, a hexagonal region located in a range surrounded by row electrodes numbered “1” to “3” and column electrodes numbered “B” to “D” , The detection point in the “2” row and “C” column located at the center represents the area.

In FIG. 12A, “1”, “3”,
The position of the intersection between the row electrode “5” and the column electrodes “B”, “D”, “F”, and “H”, and the row electrodes “2” and “4” and “A”, “C”, Although a hexagonal region centered on the position of the intersection with the column electrodes of “E”, “G”, and “I” is illustrated,
As can be easily understood by shifting the hexagonal region indicated by the broken line by the unit pitch in the row direction or the column direction (FIG. 12B).
reference. ), "1", "3", "5" row electrodes and "A",
"C", "E", "G", "I" the intersection of the column electrode, "2", "4" row electrode and "B", "D",
Hexagonal regions centered on the positions of intersections with the column electrodes “F” and “H” are simultaneously formed, and each intersection represents a respective region.

[0072]

As is apparent from the above description, according to the first aspect of the present invention, the first electrode group and the second electrode group intersect each other when viewed from the direction perpendicular to the transparent substrate. Since a large number of locations can be defined as light detection points and local detection can be performed, the cost can be reduced and the device can be made thin. Further, by forming an electrode group on a flexible transparent base material, it is possible to deform according to the shape of the surface to be measured. Therefore, even when the curvature of the surface to be measured is large, the device can be applied to the surface. It can be used in close contact.

According to the second aspect of the invention, by forming the photosensitive layer using photoconductive molecules, it is possible to detect a change in the resistance value according to the light intensity.

According to the third and fourth aspects of the invention,
By forming a plurality of photosensitive layers having different wavelength ranges of photoreaction, detection according to the wavelength range can be performed.

According to the fifth and sixth aspects, the wavelength range is
Light detection can be performed in the infrared, visible, and ultraviolet regions.

According to the seventh and eighth aspects, it is possible to acquire and process heat information from information on light intensity in the infrared region or the visible light region, or the infrared region and the visible light region.

According to the ninth aspect of the present invention, local light and heat can be detected by using a large number of locations where the electrode groups in each sheet-like member intersect with each other as detection points, thereby reducing costs and reducing costs. The size and thickness of the device can be reduced. Further, by using a structure in which an electrode group is formed on a flexible base material and the sheet-shaped members are opposed to each other, the sheet-shaped members can be freely deformed according to the shape of the surface to be measured.

According to the tenth aspect, the photosensitive material provided on one sheet-like member for covering the electrode group is shared with the electrode group on the other sheet-like member. Materials can be reduced and the device can be made thinner.

According to the eleventh aspect of the present invention, it is possible to reduce the amount of photosensitive material and to reduce the electric influence (capacitance coupling and the like) from the surrounding material on the intersection of the electrode groups.

According to the twelfth aspect of the present invention, the elongation of the electrodes accompanying the mounting of the device on the target surface can be evenly dispersed by the hexagonal region, and the degree of freedom of mounting on the detection target surface can be increased. Can be.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view for explaining a basic configuration of the present invention.

FIG. 2 is a schematic diagram for explaining an arrangement of an electrode group.

FIG. 3 is an explanatory diagram of a configuration example having a multilayer structure.

FIG. 4 is an explanatory diagram showing a configuration example in which the configuration of FIG. 3 is simplified.

FIG. 5 is an explanatory diagram showing a basic configuration of a light detection sheet.

FIG. 6 is a diagram for explaining a cross-sectional structure of a light detection sheet.

FIG. 7 partially shows a configuration example of a photodetection sheet together with FIG. 8 to FIG. 11, and FIG. 7 shows a configuration example in which a pair of sheet members in which an electrode group is formed on a film are combined. FIG.

FIG. 8 is a diagram showing a configuration example in which an insulating film is formed on a fill, and a pair of sheet members having an electrode group formed thereon are combined.

FIG. 9 is a view showing a configuration example in which a pair of sheet-like members in which an insulating film is interposed between electrodes and between photosensitive films is combined.

FIG. 10 is a diagram illustrating an example in which an electrode group formed on one of the pair of sheet members is not covered with a photosensitive material.

FIG. 11 is a diagram showing an example in which one of the pair of sheet members is coated with a photosensitive film only near the intersection of the electrodes.

FIG. 12 is a schematic diagram for explaining a division in a case where a detection area is constituted by a number of hexagonal areas.

[Explanation of symbols]

1, 1A: photodetector, L2, L2 ': transparent substrate, L3
... First electrode part, L3 '... Second electrode part, L3a, L
3'a: electrode group, L4: photosensitive layer, 2, 2 ': sheet member, 5, 5': photosensitive material

Claims (12)

[Claims] 1. A light detecting device attached to a flat or curved surface for detecting light irradiated on the surface, comprising: (a) a light-transmissive base material having a flexible structure and an electrode group; (B) the photosensitive layer receives light irradiation and has a resistance value which includes a first electrode portion and a second electrode portion, and a photosensitive layer interposed between the two electrode portions; (C) that the electrode group of the first electrode portion or the second electrode portion is formed of a light-transmitting material; (d) the transparent base material When viewed from an orthogonal direction, the electrode group forming the first electrode unit and the electrode group forming the second electrode unit are arranged so as to have an orthogonal relationship to each other or to intersect at a predetermined angle. A light detection device. 2. The photodetector according to claim 1, wherein the photosensitive layer is formed using photoconductive molecules. 3. The photodetector according to claim 1, wherein a plurality of electrode portions are arranged between the transparent substrates, and a plurality of light reaction devices having different wavelength ranges are arranged between the respective electrode portions. A photodetector, wherein each of the photosensitive layers is formed. 4. The photodetector according to claim 2, wherein a plurality of electrode portions are arranged between the transparent base materials, and a plurality of light reaction portions having different wavelength ranges are provided between the respective electrode portions. A photodetector, wherein each of the photosensitive layers is formed. 5. The photodetector according to claim 3, wherein a photosensitive layer that reacts with light in the infrared, visible, and ultraviolet regions is formed. 6. The photodetector according to claim 4, wherein a photosensitive layer that reacts with light in the infrared, visible, and ultraviolet regions is formed. 7. The light detection device according to claim 5, wherein information on light intensity detected by a photosensitive layer that reacts to light in an infrared region or a visible light region, or infrared and visible light regions is output as heat information. A photodetector characterized by the above-mentioned. 8. The light detection device according to claim 6, wherein information on light intensity detected by a photosensitive layer that responds to light in an infrared region or a visible light region, or infrared and visible light regions is output as heat information. A photodetector characterized by the above-mentioned. 9. The photodetector according to claim 1, wherein (a) the first sheet-shaped member and the second sheet-shaped member are combined in a facing state. A first electrode portion is formed on one surface of the first sheet-like member, and an electrode group forming the electrode portion is covered with a photosensitive material forming a photosensitive layer; A) a second electrode portion is formed on a surface of the second sheet member facing the second sheet member, and a group of electrodes constituting the electrode portion forms a photosensitive layer. A photodetector, which is coated with a conductive material. 10. The photodetector according to claim 1, wherein (a) the first sheet-like member and the second sheet-like member are combined in a facing state. A first electrode portion is formed on one surface of the first sheet-like member, and an electrode group forming the electrode portion is covered with a photosensitive material forming a photosensitive layer; A) a second electrode portion is formed on a surface of the second sheet member facing the first sheet member, and a group of electrodes constituting the electrode portion is coated with a photosensitive material. A photodetector characterized in that no photodetection is performed. 11. The photodetector according to claim 1, wherein a constituent material of the photosensitive layer is formed only at a location where each electrode intersects when viewed from a direction orthogonal to the transparent substrate. Photodetector. 12. The light detection device according to claim 1, wherein the light detection region is formed by a number of hexagonal regions centered on respective points at which the electrode groups intersect when viewed from a direction perpendicular to the transparent substrate. A photodetector characterized by being constituted.