Control device

Abstract

To provide a control apparatus capable of capturing a kind of a display part attached without using a connector.SOLUTION: A control apparatus 10 of an embodiment comprises a print substrate 16 which is provided so as to be corresponded to a plurality of screw holes 14H formed in each of a plurality of kinds of display parts 12 as an attachment plate having a plurality of attachment holes 16H into which a screw 22 screwed to each screw hole 14H can be inserted. Also, the control apparatus 10 of an embodiment comprises: a detection part 18 that detects whether screw 22 is inserted into an attachment hole 16H corresponding to at least one screw hole 14H formed in each display part 12 among the plurality of attachment holes 16H; and a determination part 20 that determines a kind of the display parts 12 on the basis of a detection result of the detection part 18.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a control device that is attached to any one of a plurality of types of display units and controls the attached display unit. [Background technology]

[0002] The following Patent Document 1 discloses a display system that enables a signal processing device to be used for multiple display panels with different display device types and specifications. In this display system, each of the multiple display panels stores ID information related to the type of device that constitutes the display panel. The signal processing device is connected to one of the multiple display panels via a connector, and determines the type of the display panel based on the ID information transmitted from the connected display panel, and executes control according to the determined type. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-86721 A Summary of the Invention [Problem to be solved by the invention]

[0004] The display system of Patent Document 1 is premised on connecting each of the multiple display panels to the signal processing device with a connector. Therefore, if the connector on the display panel side and the connector on the signal processing device side are different in standard and the like, and the display panel and the signal processing device cannot be connected, it is not possible to know which of the multiple display panels has the signal processing device attached.

[0005] SUMMARY OF THE PRESENT DISCLOSURE An object of the present invention is to provide a control device that can detect the type of an attached display unit without using a connector. [Means for solving the problem]

[0006] An aspect of the present invention is A control device that is attached to any one of a plurality of types of display units and controls the attached display unit, a mounting plate having a plurality of mounting holes provided corresponding to a plurality of screw holes formed in each of the plurality of types of display units, the mounting plate having a plurality of mounting holes through which screws that screw into the screw holes can be inserted; a detection unit that detects whether the screw is inserted into at least one of the mounting holes that corresponds to the screw hole formed in each of the display units; and a discrimination unit that discriminates the type of the display unit attached to the mounting plate based on a detection result of the detection unit; Equipped with. Effect of the Invention

[0007] According to the aspects of the present invention, the display unit to which the control device is attached can be identified from the insertion pattern of the screws attached to the display unit, and as a result, the type of the attached display unit can be identified without using a connector. Also, the screws attached to the display unit can be used to distinguish the type of the display unit, and the number of screws can be reduced compared to the case where a mounting screw attached to the display unit and a distinguishing screw for distinguishing the type of the display unit are provided separately. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram showing a control device according to an embodiment. [Diagram 2] FIG. 2A is a schematic diagram showing the rear surface of a display unit with a large screen size, and FIG. 2B is a schematic diagram showing the rear surface of a display unit with a small screen size. [Diagram 3] FIG. 3 is a schematic diagram showing the configuration of the control device. [Figure 4] FIG. 4 is a schematic diagram showing the configuration of the detection unit. [Diagram 5] 5A to 5D are conceptual diagrams showing screw insertion patterns. [Figure 6]FIG. 6 is a diagram showing a printed circuit board according to the first modification. [Figure 7] FIG. 7 is a diagram showing a printed circuit board according to the second modification. [Figure 8] FIG. 8 is a diagram showing a printed circuit board according to the third modification. [Figure 9] FIG. 9 is a diagram showing a printed circuit board according to the fourth modification. [Figure 10] FIG. 10 is a diagram showing a modified example of the detection unit. [Figure 11] FIG. 11A is a diagram showing a state in which a specific display unit is correctly attached, and FIG. 11B is a diagram showing a state in which a specific display unit is not correctly attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention will now be described in detail with reference to preferred embodiments thereof and accompanying drawings.

[0010] [Embodiment] 1 is a schematic diagram showing a control device 10 according to an embodiment. The control device 10 is attached to any one of a plurality of types of display units 12 and controls the attached display unit 12. The control device 10 includes a storage unit 10A. The storage unit 10A stores display unit information associated with an identifier for displaying display content in a display mode adapted to the type of display unit 12. The display unit information includes information indicating screen size, color adjustment, brightness adjustment, and the like.

[0011] The multiple types of display units 12 are selected as candidates for attachment to the control device 10. A unique identifier is assigned to each of the multiple types of display units 12 selected as attachment candidates. One of the multiple types of display units 12 is attached to the control device 10. The control device 10 acquires the identifier of the attached display unit 12, and controls the attached display unit 12 using display unit information associated with the acquired identifier, thereby causing the display content to be displayed in a display mode adapted to the display unit 12.

[0012] In this embodiment, two types of display units 12 having different screen sizes of display screen 12S are selected as candidates for attachment to control device 10. In order to distinguish between the two types of display units 12 having different screen sizes, the display unit 12 having the display screen 12S with the larger screen size may be referred to as display unit 12A, and the display unit 12 having the display screen 12S with the smaller screen size may be referred to as display unit 12B.

[0013] Fig. 2A is a schematic diagram showing the rear surface 12F of the display unit 12A having a large screen size, and Fig. 2B is a schematic diagram showing the rear surface 12F of the display unit 12B having a small screen size. Note that the rear surface 12F is the surface opposite to the display screen 12S.

[0014] A metal plate 14 for mounting the control device 10 is provided on the rear surface 12F of each of the display unit 12A and the display unit 12B. A plurality of screw holes 14H are formed in the metal plate 14. In this embodiment, the number of screw holes 14H is two. When the rear surface 12F of the display unit 12 is viewed from the front, one of the two screw holes 14H is formed in the left end of the metal plate 14, and one of the two screw holes 14H is formed in the right end. The relative positions of the two screw holes 14H differ depending on the type of the display unit 12. That is, the relative positions of the two screw holes 14H formed in the display unit 12A and the relative positions of the two screw holes 14H formed in the display unit 12B are different.

[0015] 3 is a schematic diagram showing the configuration of the control device 10. The control device 10 is provided with a printed circuit board 16, a detection unit 18, and a discrimination unit 20. An integrated circuit for controlling the display unit 12 is provided on the printed circuit board 16. The detection unit 18 may be provided on the printed circuit board 16, or the discrimination unit 20 may be provided on the printed circuit board 16. The printed circuit board 16 has a plurality of mounting holes 16H.

[0016] Each of the multiple mounting holes 16H is a hole through which a screw 22 that screws into the screw hole 14H of the display unit 12 can be inserted. A thread groove that screws into the screw 22 may be formed on the inner peripheral surface of each of the multiple mounting holes 16H, or the thread groove may not be formed. The multiple mounting holes 16H are provided in the printed circuit board 16 corresponding to the multiple screw holes 14H formed in each of the multiple types of display units 12. In this embodiment, two mounting holes 16HA corresponding to the two screw holes 14H of the display unit 12A and two mounting holes 16HB corresponding to the two screw holes 14H of the display unit 12B are provided in the printed circuit board 16.

[0017] Each of the two mounting holes 16HA and 16HB may be disposed at an end of the printed circuit board 16. In this embodiment, one of the two mounting holes 16HA and 16HB is disposed at the left (or right) end of the left-right end of the printed circuit board 16. The other of the two mounting holes 16HA and 16HB is disposed at the right (or left) end of the left-right end of the printed circuit board 16. By disposing each of the two mounting holes 16HA and 16HB at the end of the printed circuit board 16, it is possible to reduce wiring provided on the printed circuit board 16 that avoids the mounting holes 16H. The left-right direction of the printed circuit board 16 corresponds to the horizontal direction of the display screen 12S of the display unit 12 in which the printed circuit board 16 is fixed to the sheet metal 14 of the display unit 12 with the screws 22.

[0018] The detection unit 18 detects whether or not a screw 22 is inserted into each of the multiple mounting holes 16H. Fig. 4 is a schematic diagram showing the configuration of the detection unit 18. The detection unit 18 has multiple voltage sources 24, a monitoring circuit 26, and multiple noise removal filters 28.

[0019] The plurality of voltage sources 24 are provided in a one-to-one relationship with the plurality of mounting holes 16H. Each of the plurality of voltage sources 24 applies a voltage to the corresponding mounting hole 16H.

[0020] The monitoring circuit 26 monitors the voltage between each of the multiple voltage sources 24 and the corresponding mounting hole 16H. When the screw 22 is inserted into the mounting hole 16H, the metal plate 14 of the display unit 12 is connected through the screw 22, the metal plate 14 becomes the reference potential, and a voltage drop occurs between the voltage source 24 provided for the mounting hole 16H through which the screw 22 is inserted. On the other hand, when the screw 22 is not inserted into the mounting hole 16H, no voltage drop occurs between the voltage source 24 provided for the mounting hole 16H. In other words, the detection unit 18 can detect whether or not the screw 22 is inserted depending on the presence or absence of a voltage drop between each of the multiple voltage sources 24 and the corresponding mounting hole 16H.

[0021] Each of the plurality of noise elimination filters 28 is provided between each of the plurality of voltage sources 24 and the monitoring circuit 26. This makes it possible to reduce noise from the metal plate 14 of the display unit 12 connected through the screw 22 when the screw 22 is inserted into the mounting hole 16H. As a result, it is possible to improve the detection accuracy for detecting whether the screw 22 is inserted or not, compared to a case where the noise elimination filter 28 is not provided.

[0022] The discrimination unit 20 (FIG. 3) discriminates the type of the display unit 12 attached to the printed circuit board 16 based on the detection result of the detection unit 18. The discrimination unit 20 uses a table that associates the insertion pattern of the screws 22 with identifiers assigned to the types of the display unit 12, reads an identifier corresponding to the insertion pattern of the screws 22 detected by the detection unit 18, and recognizes the type of the display unit 12 corresponding to that identifier. The table may be stored in a memory included in the discrimination unit 20, or may be stored in the storage unit 10A of the control device 10.

[0023] For example, as shown in Fig. 3, by assigning "0" or "1" to each of the four mounting holes 16H, it is possible to read an identifier corresponding to the insertion pattern of the screws 22. That is, in the example of Fig. 3, when the surface (front surface) of the printed circuit board 16 opposite to the surface (back surface) that faces the metal plate 14 of the display unit 12 is viewed from the front, the lower left and lower right mounting holes 16H are assigned "0" and the upper left and upper right mounting holes 16H are assigned "1." In this case, there are four identifiers corresponding to the insertion patterns of the screws 22 that can be combined with the left mounting hole 16H and the right mounting hole 16H, as shown in Figs. 5A to 5D.

[0024] Here, when the identifier corresponding to the insertion pattern of the screws 22 is "0,1" (FIG. 5C), the discrimination unit 20 can recognize that the display unit 12 to which the control device 10 is attached is display unit 12A (FIG. 3). On the other hand, when the identifier corresponding to the insertion pattern of the screws 22 is "1,0" (FIG. 5B), the discrimination unit 20 can recognize that the display unit 12 to which the control device 10 is attached is display unit 12B (FIG. 3). On the other hand, when the identifier corresponding to the insertion pattern of the screws 22 is other than "1,0" and "0,1" (FIGS. 5A and 5D), the discrimination unit 20 can recognize that the display unit 12 to which the control device 10 is attached is other than display unit 12A or display unit 12B.

[0025] In this way, the control device 10 detects with the detection unit 18 whether or not the screws 22 are inserted into each of the multiple mounting holes 16H, reads an identifier corresponding to the insertion pattern of the detected screws 22, and discriminates the type of the display unit 12 with the discrimination unit 20. This makes it possible to identify the type of the mounted display unit 12 without using a connector. Also, the screws 22 attached to the display unit 12 can also be used as discrimination screws for discriminating the type of the display unit 12, and the number of screws required can be reduced compared to the case where mounting screws attached to the display unit 12 and discrimination screws for discriminating the type of the display unit 12 are provided separately.

[0026] In this embodiment, the relative positions of the multiple screw holes 14H of each of the multiple types of display units 12 differ depending on the type of display unit 12. Therefore, the installer can be notified of the display unit 12 to which the control device 10 should be attached based on the relative positions of the mounting holes 16H corresponding to the screw holes 14H.

[0027] [Modifications] The above embodiment may be modified as follows.

[0028] (Variation 1) Fig. 6 is a diagram showing a printed circuit board 16 of Modification 1. In Fig. 6, the same reference numerals are used for configurations equivalent to those described in the embodiment. Note that in this modification, descriptions that overlap with the embodiment will be omitted as appropriate.

[0029] In this modified example, the number of mounting holes 16H provided on each of the left and right sides of the printed circuit board 16 is increased compared to the embodiment. That is, three mounting holes 16H are provided on the left end of the printed circuit board 16, and three mounting holes 16H are provided on the right end of the printed circuit board 16, resulting in nine possible insertion patterns for the screws 22.

[0030] In this modified example, although not shown, similarly to the embodiment, a voltage source 24 (FIG. 4) is provided for each of the six mounting holes 16H, and a noise removal filter 28 is provided between each of the six voltage sources 24 and the monitoring circuit 26. This enables the discrimination unit 20 to read an identifier corresponding to the insertion pattern of the screws 22 detected by the detection unit 18.

[0031] For example, when the surface (front surface) of the printed circuit board 16 opposite to the surface (back surface) facing the metal plate 14 of the display unit 12 is viewed from the front, the lower left and lower right mounting holes 16H are assigned as "0," and the upper left and upper right mounting holes 16H are assigned as "2." The mounting hole 16H between the lower left mounting hole 16H and the upper left mounting hole 16H, and the mounting hole 16H between the lower right mounting hole 16H and the upper right mounting hole 16H are assigned as "1." When assigned in this way, the discrimination unit 20 can read any of "0,0," "0,1," "0,2," "1,0," "1,1," "1,2," "2,0," "2,1," or "2,2" as an identifier corresponding to the insertion pattern of the screws 22 that can be combined.

[0032] Therefore, in this modified example, the discrimination unit 20 can discriminate between a maximum of nine types of the display unit 12.

[0033] (Variation 2) Fig. 7 is a diagram showing a printed circuit board 16 of Modification 2. In Fig. 7, the same reference numerals are used for configurations equivalent to those described in the embodiment. Note that in this modification, descriptions that overlap with the embodiment will be omitted as appropriate.

[0034] In this modified example, the number of mounting holes 16H provided on each of the left and right sides of the printed circuit board 16 is increased compared to the embodiment. That is, four mounting holes 16H are provided on the left end of the printed circuit board 16, and four mounting holes 16H are provided on the right end of the printed circuit board 16. There are 16 possible insertion patterns of the screws 22 that can be combined with each mounting hole 16H, as shown in Figs. 5A to 5D, although not shown.

[0035] In this modified example, although not shown, as in the embodiment, a voltage source 24 (FIG. 4) is provided for each of the eight mounting holes 16H, and a noise removal filter 28 is provided between each of the eight voltage sources 24 and the monitoring circuit 26. This enables the discrimination unit 20 to read an identifier corresponding to the insertion pattern of the screws 22 detected by the detection unit 18, and discriminate between a maximum of 16 types of display unit 12.

[0036] In this modification, the four mounting holes 16H on the left side are provided in pairs at the upper corner and the lower corner, and the four mounting holes 16H on the right side are provided in pairs at the upper corner and the lower corner. This reduces wiring that avoids the mounting holes 16H on the printed circuit board 16 compared to when the mounting holes 16H are not provided at the corners. The top and bottom of the printed circuit board 16 correspond to the top and bottom of the display unit 12 when the printed circuit board 16 is fixed to the metal plate 14 of the display unit 12 with the screws 22. The corners of the printed circuit board 16 are edges where the left-right direction and the up-down direction intersect.

[0037] (Variation 3) Fig. 8 is a diagram showing a printed circuit board 16 of Modification 3. In Fig. 8, the same reference numerals are used for configurations equivalent to those described in the embodiment. Note that in this modification, descriptions that overlap with the embodiment will be omitted as appropriate.

[0038] In this modified example, the number of mounting holes 16H provided on each of the left and right sides of the printed circuit board 16 is increased compared to the embodiment. That is, four mounting holes 16H are provided on the left end of the printed circuit board 16, and two mounting holes 16H are provided on the right end of the printed circuit board 16, resulting in eight possible insertion patterns of the screws 22.

[0039] In this modified example, although not shown, similarly to the embodiment, a voltage source 24 (FIG. 4) is provided for each of the six mounting holes 16H, and a noise removal filter 28 is provided between each of the six voltage sources 24 and the monitoring circuit 26. This enables the discrimination unit 20 to read an identifier corresponding to the insertion pattern of the screws 22 detected by the detection unit 18, and discriminate between a maximum of eight types of the display unit 12.

[0040] In this modification, the four mounting holes 16H on the left side are provided in two each at the upper corner and the lower corner, and the two mounting holes 16H on the right side are provided in the upper (or lower) corner. This makes it possible to reduce wiring that avoids the mounting holes 16H on the printed circuit board 16, compared to when the mounting holes 16H are not provided at the corners.

[0041] (Variation 4) Fig. 9 is a diagram showing a printed circuit board 16 of Modification 4. In Fig. 9, the same reference numerals are used for configurations equivalent to those described in the embodiment. Note that in this modification, descriptions that overlap with the embodiment will be omitted as appropriate.

[0042] In this modified example, in addition to the mounting hole 16H in which it is monitored whether or not a screw 22 is inserted, a second mounting hole 16H2 in which it is not monitored whether or not a screw 22 is inserted is provided in the printed circuit board 16.

[0043] The second mounting hole 16H2 is the same as the mounting hole 16H in that it is a hole through which the screw 22 can be inserted. On the other hand, the second mounting hole 16H2 is different from the mounting hole 16H in that it is not included in the combination of insertion patterns of the screw 22 and is a hole solely for screw fixing. The number of second mounting holes 16H2 is one in FIG. 9, but it may be two or more. By providing one or two or more second mounting holes 16H2 in the printed circuit board 16, the control device 10 can be firmly fixed to the display unit 12 by the screw 22.

[0044] (Variation 5) Fig. 10 is a diagram showing a modified example of the detection unit 18. In Fig. 10, the same reference numerals are used for configurations equivalent to those described in the embodiment. Note that in this modified example, descriptions that overlap with the embodiment will be omitted as appropriate.

[0045] This modification differs from the embodiment in that some of the voltage sources 24 and noise removal filters 28 of the detection unit 18 are omitted.

[0046] Specifically, the voltage source 24 and the noise removal filter 28 that were provided for one of the two mounting holes 16HA provided in the printed circuit board 16 corresponding to the two screw holes 14H of the display unit 12A are omitted. Therefore, the detection unit 18 detects whether or not the screw 22 is inserted into one of the two mounting holes 16HA, but does not detect whether or not the screw 22 is inserted into the other of the two mounting holes 16HA.

[0047] Also, the voltage source 24 and the noise elimination filter 28 that were provided for one of the two mounting holes 16HB provided in the printed circuit board 16 corresponding to the two screw holes 14H of the display unit 12B are omitted. Therefore, while the detection unit 18 detects whether or not the screw 22 is inserted into one of the two mounting holes 16HB, the detection unit 18 does not detect whether or not the screw 22 is inserted into the other of the two mounting holes 16HB.

[0048] In this modification, when detection unit 18 obtains a detection result that a screw 22 is inserted through one mounting hole 16HA and a screw 22 is not inserted through one mounting hole 16HB, discrimination unit 20 discriminates that it is display unit 12A. On the other hand, when detection unit 18 obtains a detection result that a screw 22 is not inserted through one mounting hole 16HA and a screw 22 is inserted through one mounting hole 16HB, discrimination unit 20 discriminates that it is display unit 12B.

[0049] In this way, even if the detection unit 18 detects only one of the mounting holes 16H corresponding to the two screw holes 14H provided in the metal plate 14 of the display unit 12, the type of display unit 12 can be determined as in the embodiment.

[0050] In this modified example, the number of screw holes 14H provided in the metal sheet 14 of the display unit 12 is two, but the number of screw holes 14H provided in the metal sheet 14 of the display unit 12 may be n (n=an integer equal to or greater than 3). When the number of screw holes 14H provided in the metal sheet 14 of the display unit 12 is n, the type of the display unit 12 can be determined as in the embodiment by setting the mounting hole 16H corresponding to (n-1) as the detection target of the detection unit 18.

[0051] (Variation 6) Fig. 11A is a diagram showing a state where a specific display unit 12 is correctly attached, and Fig. 11B is a diagram showing a state where a specific display unit 12 is not correctly attached. In Fig. 11A and Fig. 11B, the same reference numerals are used for configurations equivalent to those described in the embodiment. Note that in this modified example, descriptions that overlap with the embodiment will be omitted as appropriate.

[0052] In this modified example, four mounting holes 16H are provided in the printed circuit board 16 so that the relative position of the mounting holes 16HA corresponding to the two screw holes 14H of the display unit 12A is the same as the relative position of the mounting holes 16HB corresponding to the two screw holes 14H of the display unit 12B.

[0053] In this modification, the metal plate 14 of the display unit 12A is provided with an engagement portion 14A for engaging with an engagement claw 30A of a cover member 30 that covers the printed circuit board 16 to fix the cover member 30 to the metal plate 14. The engagement portion 14A protrudes from the back surface 12F of the display unit 12A.

[0054] Here, when the control device 10 is attached to the display unit 12A by inserting the screws 22 through the two screw holes 14H of the display unit 12A and the mounting holes 16HA corresponding to the screw holes 14H (FIG. 11A), the printed circuit board 16 does not come into contact with the engagement portion 14A. Therefore, the printed circuit board 16 comes into contact with the metal plate 14.

[0055] On the other hand, when the control device 10 is attached to the display unit 12A by inserting the screws 22 through the two screw holes 14H of the display unit 12A and the mounting holes 16HB that do not correspond to the screw holes 14H (FIG. 11B), the relative position of the printed circuit board 16 with respect to the metal plate 14 is shifted. As a result, the printed circuit board 16 comes into contact with the engagement parts 14A, preventing the screws 22 from being fastened, and a gap is generated between the printed circuit board 16 and the metal plate 14.

[0056] Although not shown, the same applies to the case where the control device 10 is attached to the display unit 12B. That is, when the screws 22 are inserted through the two screw holes 14H of the display unit 12B and the mounting holes 16HB that correspond to the screw holes 14H, the fastening of the screws 22 is not inhibited and the printed circuit board 16 comes into contact with the metal sheet 14. On the other hand, when the screws 22 are inserted through the two screw holes 14H of the display unit 12B and the mounting holes 16HA that do not correspond to the screw holes 14H, the fastening of the screws 22 is inhibited and a gap is generated between the printed circuit board 16 and the metal sheet 14.

[0057] In this way, the printed circuit board 16 has a shape that suppresses the fastening of the screw 22 when the screw 22 is not inserted through the corresponding mounting hole 16H and screw hole 14H. This makes it possible to notify the installer, based on the shape of the printed circuit board 16, whether the control device 10 has been mistakenly attached to a display unit 12 different from the display unit 12 to which it is to be attached.

[0058] In this modified example, the relative position of the mounting hole 16HA corresponding to the two screw holes 14H of the display unit 12A is the same as the relative position of the mounting hole 16HB corresponding to the two screw holes 14H of the display unit 12B, but this can also be applied when the relative positions are different.

[0059] (Variation 7) In the embodiment, the number of screw holes 14H provided in the metal sheet 14 of one display unit 12 and the number of mounting holes 16H corresponding to the screw holes 14H are two, but they may be three or more. The greater the number of screw holes 14H provided in the metal sheet 14 of one display unit 12 and the greater the number of mounting holes 16H corresponding to the screw holes 14H, the more firmly the control device 10 can be fixed to the display unit 12 by the screws 22.

[0060] (Variation 8) In the embodiment, the mounting plate in which the mounting holes 16H are formed is the printed circuit board 16, but it may also be a wall plate that constitutes the housing of the control device 10 and covers the printed circuit board 16, or it may be a metal plate fixed to the wall plate.

[0061] (Variation 9) The above embodiment and modifications 1 to 8 may be combined in any manner as long as no contradiction occurs.

[0062] 〔invention〕 The invention that can be understood from the above embodiment and modifications 1 to 9 will be described below.

[0063] The present invention is a control device (10) that is attached to any one of a plurality of types of display units (12) and controls the attached display unit (12). The control device (10) includes an attachment plate having a plurality of attachment holes (16H) that are provided corresponding to a plurality of screw holes (14H) formed in each of the plurality of types of display units (12) and through which screws (22) that are to be screwed into the screw holes (14H) can be inserted, a detection unit (18) that detects whether or not a screw (22) has been inserted into the attachment hole (16H) that corresponds to at least one screw hole (14H) formed in each of the display units (12) among the plurality of attachment holes (16H), and a discrimination unit (20) that discriminates the type of the display unit (12) attached to the attachment plate based on the detection result of the detection unit (18). This makes it possible to identify the type of the attached display unit 12 without using a connector. Also, the screws 22 attached to the display unit 12 can also be used to identify the type of the display unit 12, reducing the number of screws required compared to when separate screws are provided for attaching the display unit 12 and for identifying the type of the display unit 12.

[0064] The relative positions of the multiple screw holes (14H) of each of the multiple types of display units (12) may differ depending on the type of display unit (12). This makes it possible for an installer to be notified of the display unit (12) to which the control device (10) should be attached based on the relative positions of the mounting holes (16H) corresponding to the screw holes (14H).

[0065] The mounting plate may have a shape that suppresses fastening of the screw (22) when the screw (22) is not inserted through the corresponding mounting hole (16H) and screw hole (14H). This makes it possible to notify the installer whether the control device (10) is mistakenly attached to a display unit (12) other than the display unit (12) to be attached, based on the shape of the mounting plate.

[0066] The detection unit 18 may have a plurality of voltage sources 24 provided for each of the plurality of mounting holes 16H, and a monitoring circuit 26 that monitors the voltage between each of the plurality of mounting holes 16H and the corresponding mounting hole 16H. This makes it possible to detect whether the screw 22 is inserted or not depending on whether there is a voltage drop between each of the plurality of voltage sources 24 and the corresponding mounting hole 16H.

[0067] The detection unit (18) may have a noise reduction filter (28) provided between each of the plurality of voltage sources (24) and the monitoring circuit (26). This makes it possible to reduce noise from the metal plate (14) of the display unit (12) connected through the screw (22) when the screw (22) is inserted into the mounting hole (16H). As a result, it is possible to improve the detection accuracy for detecting whether the screw (22) is inserted, compared to a case where the noise reduction filter (28) is not provided.

[0068] The mounting plate may be a printed circuit board 16, and the detection unit 18 may be provided on the printed circuit board 16. This allows the number of parts to be reduced, resulting in a smaller device.

[0069] The screen sizes of the multiple types of display units 12 may be different from one another, so that the screen sizes of the display units 12 can be determined based on the detection results of the detection unit 18. [Explanation of symbols]

[0070] 10...Control device 12, 12A, 12B...Display unit 14... Sheet metal 16... Printed circuit board 18: detection unit 20: discrimination unit 22...Screw 24...Voltage source 26...Monitoring circuit 28...Noise removal filter

Claims

1. A control device that is attached to any one of a plurality of types of display units and controls the attached display unit, a mounting plate having a plurality of mounting holes provided corresponding to a plurality of screw holes formed in each of the plurality of types of display units, the mounting plate having a plurality of mounting holes through which screws that are to be screwed into the screw holes can be inserted; a detection unit that detects whether the screw is inserted into at least one of the mounting holes that corresponds to the screw hole formed in each of the display units; and a discrimination unit that discriminates the type of the display unit attached to the mounting plate based on a detection result of the detection unit; Equipped with A control device in which the screws are inserted into all of the mounting holes that match each of the multiple screw holes provided in the display unit, among the multiple mounting holes provided in the mounting plate.

2. The control device according to claim 1 , A control device, wherein the relative positions of a plurality of screw holes in each of the plurality of types of display units differ depending on the type of the display unit.

3. The control device according to claim 1 or 2, A control device, wherein the mounting plate has a shape that prevents the screw from being fastened when the screw is not inserted through the corresponding mounting hole and screw hole.

4. The control device according to any one of claims 1 to 3, The detection unit is A plurality of voltage sources provided for each of the plurality of mounting holes; A control device having a monitoring circuit that monitors a voltage between each of the plurality of mounting holes and a corresponding one of the mounting holes.

5. The control device according to claim 4, The control device, wherein the detection unit has a noise removal filter provided between each of the plurality of voltage sources and the monitoring circuit.

6. The control device according to any one of claims 1 to 5, the mounting plate is a printed circuit board; The detection unit is provided on the printed circuit board.

7. The control device according to any one of claims 1 to 6, A control device, wherein the screen sizes of the plurality of types of display units are different.

Images