JP2014032749A - Connector connection structure, electronic apparatus, and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector connection structure which can assist correct connection by preventing reverse insertion, and can shorten the connector connectin time, and to provide an electronic apparatus including the connector connection structure, and a projector.SOLUTION: The connector connection structure comprises: USB connectors 24 and 31 which can be inserted and removed each other: a pressure sensor 25 installed in the USB connector 24 and detecting the pressure due to contact with the USB connector 31: a speaker 28 (notice section) to notice the information: and a control section 20 (notice control section) for noticing the speaker 28 that a predetermined pressure is exceeded, based on the detection results from the pressure sensor 25. The pressure sensor 25 includes a sheet-like gauge sensor, which is installed on the apical surface 243a at the terminal 242 of the USB connector 24.

Description

  The present invention relates to a connector connection structure, an electronic device, and a projector.

  Conventionally, various connectors for connecting to various external devices are installed in electronic devices. When an external device is connected, a cable (connector on the cable side) installed (or connected) on the external device is inserted into a corresponding connector among various connectors installed on the electronic device.

  In Patent Document 1, in the friction lock type connector connection structure, the locking force is increased by providing a pressurizing means that allows the locking engagement spring to be pressed against the locking engagement hole side on one connector side. Therefore, a connector connection structure that can prevent falling off has been proposed.

JP 2009-21069 A

When a user inserts a cable-side connector into a connector installed on an electronic device, if the outer shape of the connector is the same (even if it is reversed upside down or left / right reversed) The user does not notice even if the connector on the cable side is reversed, and the user tries to insert it into the connector on the electronic device side. In this case, since the user assumes that the connector is in the correct orientation, it takes time to realize that the connector is in the opposite direction. Then, the user notices that it is in the opposite direction by not being able to insert it, and can insert it correctly by reversing the direction of the connector and inserting it again. As described above, there is a problem that it is difficult to determine whether or not the orientation of the connector is correct. In addition, this causes a problem that it takes a considerable time to correctly connect the connector. This becomes even more prominent when it is difficult to visually confirm the orientation of the connector installed in the electronic device or the orientation of the connector on the cable side.
Accordingly, it is possible to prevent reverse insertion (reverse insertion) and to assist in making a correct connection, and to shorten the connector connection time, and to provide an electronic device and projector equipped with this connector connection structure. It was requested.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following application examples.

  [Application Example 1] A connector connection structure according to this application example includes a connector that can be inserted into and removed from each other, a pressure sensor that is installed in one connector, detects pressure caused by contact between the connector and the other connector, and information And a notification control unit that notifies the notification unit that the predetermined pressure has been exceeded when the pressure is equal to or higher than a predetermined pressure based on the detection result of the pressure sensor.

  According to such a connector connection structure, it can be detected by the pressure sensor installed in one connector that the other connector is inserted into one connector in the reverse direction, and the notification control unit The notification unit can notify that it has been inserted in the reverse direction. Thereby, the user can immediately determine that the direction of the connector is reversed, and can correctly insert (connect) by reinserting the connector with the direction of the connector reversed. In this way, by notifying the user that the connector is in the reverse direction, it is possible to prevent reverse insertion and assist in making a correct connection. As a result, the connector connection time can be shortened, and the connector can be connected efficiently.

  Application Example 2 In the connector connection structure according to the application example described above, it is preferable that the pressure sensor includes a sheet-like gauge sensor, and the gauge sensor is installed on the distal end surface of the terminal portion of one connector.

  According to such a connector connection structure, when a connector is about to be inserted backward, the reverse insertion can be detected as a pressure due to contact by a sheet-like gauge sensor installed at the tip of the terminal portion of one connector. The user can be informed immediately that the direction is reversed.

  Application Example 3 In the connector connection structure according to the application example, the connector is preferably a USB connector type A.

  Since the USB (Universal Serial Bus) connector type A has the same shape even if the outer shape of the connector is reversed, the possibility of being inserted backward becomes high. Therefore, it is effective to apply this connector connection structure to the USB connector type A.

  Application Example 4 An electronic device according to this application example includes a connector connected to an external device, a pressure sensor that is installed in the connector and detects pressure due to contact with the connector, and a notification unit that notifies information And a notification control unit that, based on the detection result of the pressure sensor, notifies the notification unit that the predetermined pressure has been exceeded when the pressure exceeds the predetermined pressure.

  According to such an electronic device, it is possible to detect the reverse insertion into the connector by the pressure sensor, and it is possible to notify the notification unit of the insertion in the reverse direction by the notification control unit. As a result, the user can determine that the direction of the connector is reverse, and can insert (connect) correctly by reinserting the connector with the direction of the connector reversed. Accordingly, by notifying the user that the connector is in the reverse direction, it is possible to realize an electronic device that can prevent reverse insertion and assist in making a correct connection. As a result, the connector connection time can be shortened, and the connector can be connected efficiently. Further, the connectors can be reliably connected to each other, and information from the connected external device can be reliably input into the electronic device.

  Application Example 5 In the electronic device according to the application example, the connector is preferably a USB connector type A.

  The USB connector type A has the same shape even if the outer shape of the connector is reversed, so there is a high possibility that it will be inserted backwards. It is effective to apply this connector connection structure to this connector. It becomes the target. Therefore, it is possible to realize an electronic device that allows the connector to be efficiently connected.

  Application Example 6 A projector according to this application example includes a connector connected to an external device, a pressure sensor that is installed in the connector and detects pressure due to contact with the connector, and a notification unit that notifies information Based on the detection result of the pressure sensor, when the pressure is equal to or higher than a predetermined pressure, a notification control unit that notifies the notification unit that the predetermined pressure has been exceeded, a light source that emits a light beam, and a light beam emitted from the light source as an image signal And a light modulation device that performs modulation based on the above.

  According to such a projector, it can be detected by the pressure sensor that it has been inserted backward into the connector, and the notification unit can notify that it has been inserted in the reverse direction. As a result, the user can determine that the direction of the connector is reverse, and can insert (connect) correctly by reinserting the connector with the direction of the connector reversed. Therefore, by informing the user that the connector is in the reverse direction, it is possible to realize a projector that can prevent reverse insertion and assist in making a correct connection. As a result, the connector connection time can be shortened, and the connector can be connected efficiently. In addition, since the connectors can be reliably connected to each other, information from the connected external device can be reliably input into the projector.

  Application Example 7 In the projector according to the application example described above, the connector is preferably a USB connector type A.

  The USB connector type A has the same shape even if the outer shape of the connector is reversed, so there is a high possibility that it will be inserted backwards. It is effective to apply this connector connection structure to this connector. It becomes the target. Therefore, it is possible to realize a projector that efficiently performs connector connection.

1 is a schematic perspective view showing a USB connector of a projector according to an embodiment. The block diagram which shows the circuit structure of a projector. It is a general sectional view showing the connection relation of a USB connector, (a) is a diagram showing a state before connection, (b) is a diagram showing a normally inserted state, (c) is a diagram showing a reverse insertion state.

Hereinafter, embodiments will be described with reference to the drawings.
(Embodiment)

  FIG. 1 is a schematic perspective view showing the USB connector 24 of the projector 1 according to the embodiment. FIG. 1 shows a USB connector 24 as a connector installed in the projector 1 and a USB cable 30 connected to the USB connector 24. The configuration of the connector of the projector 1 will be described with reference to FIG.

  A projector 1 as an electronic device is configured such that an apparatus main body is covered with a housing 2 formed in a substantially hexahedron box shape. On the side surface of the housing 2, a plurality of connection terminals constituting an audio / video input unit 23 described later are installed. As the connection terminals, for example, a D-Sub terminal, a high definition multimedia interface (HDMI) terminal, a USB terminal (USB connector 24) of the present embodiment, and the like are installed. In FIG. 1, only a USB (Universal Serial Bus) connector 24 is illustrated.

  The USB connector 24 is installed horizontally using Type A. The USB cable 30 connected to the USB connector 24 is provided with a USB connector (type A) 31 serving as a connector on the insertion side, and can be inserted into and removed from the USB connector 24. Note that a pressure sensor 25 described later is attached to the distal end surface 243a of the terminal portion 242 (substrate 243) of the USB connector 24.

  FIG. 2 is a block diagram illustrating a circuit configuration of the projector 1. The circuit configuration of the projector 1 will be described with reference to FIG.

  As shown in FIG. 2, the projector 1 includes an image projection unit 10, a control unit 20, a storage unit 21, an operation panel 22, an image / sound input unit 23, an image processing unit 26, a sound processing unit 27, a sound output unit, and a notification unit. As a speaker 28 or the like. The audio / video input unit 23 includes a USB connector 24 and the like. The USB connector 24 is provided with a pressure sensor 25.

  The image projection unit 10 includes a light source 11, three liquid crystal light valves 12 as a light modulation device, a projection lens 13 as a projection optical system, a light valve drive unit 14, and the like. The image projection unit 10 corresponds to a so-called display unit. The light emitted from the light source 11 is modulated by three liquid crystal light valves 12 to form image light, and the image light is projected from the projection lens 13. By doing so, an image is displayed on the screen SC or the like.

  The light source 11 includes a discharge-type light source lamp 11a made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, and a reflector 11b that reflects light emitted from the light source lamp 11a to the liquid crystal light bulb 12 side. Light emitted from the light source 11 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red light (R light) that is the three primary colors of light by a color separation optical system (not shown). Separated into each color light component of green light (G light) and blue light (B light). The light separated into the color light components of the three primary colors enters the three liquid crystal light valves 12 of the R light liquid crystal light valve 12R, the G light liquid crystal light valve 12G, and the B light liquid crystal light valve 12B, respectively.

  The three liquid crystal light valves 12 are each configured by a liquid crystal panel or the like in which liquid crystal is sealed between a pair of transparent substrates. The liquid crystal light valve 12 is formed with a plurality of pixels arranged in a matrix, and a driving voltage can be applied to the liquid crystal for each pixel. When the light valve driving unit 14 applies a driving voltage corresponding to the input image signal to each pixel, each pixel is set to a light transmittance corresponding to the image signal. For this reason, the light emitted from the light source 11 is modulated by passing through the corresponding liquid crystal light valve 12, and image light corresponding to the image signal is formed for each color light. The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become image light representing a color image, and then enlarged and projected onto the screen SC or the like by the projection lens 13.

  The control unit 20 includes a CPU (Central Processing Unit), a RAM (Random Access Memory) used for temporary storage of various data, and the like, and operates according to a control program stored in the storage unit 21 to operate the projector 1. Centrally control the operation. That is, the control unit 20 functions as a computer together with the storage unit 21. In the present embodiment, the control unit 20 serves as a notification control unit that notifies the notification unit (speaker 28) that a predetermined pressure has been exceeded when the pressure is equal to or higher than a predetermined pressure based on the detection result of the pressure sensor 25. It has a function.

  The storage unit 21 includes a non-volatile memory such as a mask ROM (Read Only Memory), a flash memory, or an FeRAM (Ferroelectric RAM). The storage unit 21 stores a control program for controlling the operation of the projector 1, various setting data for defining operation conditions of the projector 1, and the like. In the present embodiment, the storage unit 21 stores a pressure determination program that determines whether the pressure is equal to or higher than a predetermined pressure based on a signal detected by the pressure sensor 25.

  The operation panel 22 includes a plurality of operation keys that accept input operations from the user. When the user operates various operation keys on the operation panel 22, the operation panel 22 outputs an operation signal corresponding to the operation content of the user to the control unit 20.

  The image / audio input unit 23 includes a plurality of connection terminals for connecting to an external image / audio output device (not shown) such as a personal computer or a DVD (Digital Versatile Disc) playback device via a cable. Various types of image information and audio information are input from the audio output device. The image / audio input unit 23 outputs the input image information to the image processing unit 26, and outputs the input audio information to the audio processing unit 27.

  The image processing unit 26 converts the various types of image information input from the audio / video input unit 23 into image information representing the gradation of each pixel of the liquid crystal light valve 12 (12R, 12G, 12B). The converted image information is classified by color light of R light, G light, and B light, and is constituted by a plurality of pixel values corresponding to all the pixels of each liquid crystal light valve 12 (12R, 12G, 12B). Yes. The pixel value determines the light transmittance of the corresponding pixel, and the intensity (gradation) of light emitted from each pixel is defined by the pixel value.

  Further, the image processing unit 26 performs image quality adjustment processing for adjusting brightness, contrast, sharpness, hue, and the like on the converted image information based on an instruction from the control unit 20, and a setting menu on the input image. For example, OSD (On Screen Display) processing for superimposing and the like is performed, and the processed image information is output to the light valve driving unit 14.

  When the light valve driving unit 14 drives the liquid crystal light valve 12 (12R, 12G, 12B) according to the image information input from the image processing unit 26, the liquid crystal light valve 12 (12R, 12G, 12B) responds to the image information. The image light is formed, and this image light is projected from the projection lens 13 onto the screen SC. As a result, an input image based on the input image information is displayed on the screen SC.

  The sound processing unit 27 performs processing such as sound quality adjustment processing and volume adjustment processing on the sound information input from the image sound input unit 23 based on an instruction from the control unit 20. Then, the processed sound information is supplied to the speaker 28, and sound based on the sound information is output from the speaker 28.

  The USB connector 24 uses type A. A pressure sensor 25 is installed on the front end surface 243 a of the terminal portion 242 of the USB connector 24. In this embodiment, the pressure sensor 25 includes a sheet-like gauge sensor, and detects the pressure due to contact.

  3 is a schematic cross-sectional view showing the connection relationship between the USB connectors 24 and 31, FIG. 3 (a) is a diagram showing a state before connection, and FIG. 3 (b) is a diagram showing a state in which the connection is normally performed. 3 (c) is a diagram illustrating a reverse insertion state. Note that FIG. 3A shows the same orientation as the USB connectors 24 and 31 shown in FIG. The connection between the USB connector 24 and the USB cable 30 (USB connector 31) and the operation of the control unit 20 will be described with reference to FIG.

  As shown in FIG. 3A, the USB connector 24 is a so-called female connector, and is hereinafter referred to as a receiving-side connector 24 and used as appropriate. The USB connector 31 installed on the USB cable 30 is a so-called male connector, and is hereinafter referred to as a plug-in connector 31 and used as appropriate.

  The receiving-side connector 24 has a type A configuration. Specifically, the receiving-side connector 24 is surrounded by a metal frame 241 that has a rectangular cylindrical shape in plan view, and a terminal portion 242 is formed therein. The terminal portion 242 has a configuration in which an insulating substrate 243 is installed in an upward direction surrounded by a metal frame 241, and a plurality of terminals 244 are installed on the back surface (lower surface) of the substrate 243. A pressure sensor 25 is attached to the front end surface 243 a of the substrate 243.

  On the other hand, the plug-in side connector 31 has a type A configuration like the receiving side connector 24. Specifically, the insertion-side connector 31 is surrounded by a metal frame 311 that has a rectangular cylindrical shape in plan view, and a terminal portion 312 is formed therein. The terminal portion 312 has a configuration in which an insulating substrate 313 is installed in a downward direction surrounded by a metal frame 311, and a plurality of terminals 314 are installed on the surface (upper surface) of the substrate 313. Note that the pressure sensor 25 is not provided on the front end surface 313 a of the substrate 313. A USB mark (not shown) is formed on the upper surface 321 (see FIG. 1) of the mold portion 32 (see FIG. 1) that covers the insertion-side connector 31.

  When the insertion-side connector 31 is oriented as shown in FIG. 3A with respect to the receiving-side connector 24, the connection orientation is normal. When the insertion-side connector 31 is inserted into the receiving-side connector 24 in this direction, the state shown in FIG.

  Specifically, as shown in FIG. 3B, the metal frame 311 of the insertion-side connector 31 can be connected by being inserted inside the metal frame 241 of the receiving-side connector 24 and pushed in that state. . In the case of normal connection, the terminal 244 of the receiving side connector 24 and the terminal 314 of the insertion side connector 31 are electrically connected. Further, the plug-in side connector 31 (metal frame 311) is fixed by a locking portion (not shown) of the receiving side connector 24 (metal frame 241).

  However, as shown in FIG. 3 (c), when the insertion side connector 31 is in the reverse direction (upside down), when trying to insert into the reception side connector 24, the metal of the reception side connector 24 Even if the frame 241 and the metal frame 311 of the plug-in side connector 31 are in the reverse direction, they are rectangular when viewed from the front, so the metal frame 311 in the reverse direction is placed inside the metal frame 241. Can be inserted to some extent along.

  However, since the front end surface 313a of the board 313 of the insertion side connector 31 abuts on the front end face 243a of the board 243 of the receiving side connector 24, it cannot be inserted any further. By such an insertion operation, the pressure sensor 25 attached to the front end surface 243a of the substrate 243 is brought into a state where the front end surface 313a of the substrate 313 contacts and is pressed.

  The control unit 20 reads and activates a pressure determination program stored in the storage unit 21 and determines whether or not the pressure is equal to or higher than a predetermined pressure based on a signal detected by the pressure sensor 25. And even if it contact | abuts, when the insertion operation continues and it becomes more than a predetermined pressure, the control part 20 outputs the audio | voice information for notification memorize | stored in the memory | storage part 21 to the audio | voice processing part 27. FIG.

  The sound processing unit 27 processes the input sound information based on an instruction from the control unit 20, supplies the processed sound information to the speaker 28, and the sound based on the sound information is output from the speaker 28. Note that the audio information output from the speaker 28 is a buzzer sound in the present embodiment, but may be a melody sound or a synthesized voice.

  As described above, in this embodiment, the control unit 20 operates as a notification control unit that notifies the speaker 28 that the predetermined pressure has been exceeded when the pressure exceeds the predetermined pressure based on the detection result of the pressure sensor 25. Do. Then, a buzzer sound output from the speaker 28 notifies the user that it is reverse insertion.

  From the buzzer sound output from the speaker 28, the user notices that the direction of the plug-in connector 31 is reversed. Then, the user can correct the insertion direction by turning the insertion-side connector 31 upside down, correct it to the normal direction, and insert it again to insert correctly (connect).

According to the embodiment described above, the following effects can be obtained.
According to the connector connection structure and the projector 1 of the present embodiment, it is possible to detect the reverse insertion to the receiving side connector 24 by the pressure sensor 25, and to reverse the direction by the control unit 20 (notification control unit). It is possible to notify the speaker 28 (notification unit) that it has been inserted. As a result, the user can determine that the orientation of the insertion-side connector 31 is reversed, and can insert (connect) correctly by reinserting the insertion-side connector 31 in the opposite direction. Therefore, by notifying the user that the direction of the plug-in connector 31 is reverse, it is possible to prevent reverse insertion and assist in making a correct connection. As a result, the connector connection time can be shortened, and the connector can be connected efficiently. Further, since the connectors can be reliably connected to each other, information from the connected external device can be reliably input into the projector 1.

  According to the connector connection structure and the projector 1 of the present embodiment, the pressure sensor 25 includes a sheet-like gauge sensor, and the gauge sensor is installed on the distal end surface 243 a of the terminal portion 242 of the receiving-side connector 24. As a result, when the insertion-side connector 31 is about to be reversely inserted, the reverse insertion can be detected as a pressure due to contact by the pressure sensor 25 installed on the distal end surface 243a of the receiving-side connector 24, which is in the reverse direction. This can be immediately notified to the user.

  The connector connection structure of this embodiment is applied to a USB connector (type A). Since the USB connector type A (USB connectors 24 and 31 of this embodiment) has the same shape (rectangular shape) even if the external shape of the connector is reversed, there is a possibility that the USB connector is reversely inserted. high. Note that a USB mark is formed on the male connector (plug-in side connector 31), and the orientation of the plug-in side connector 31 can be determined from the USB mark. However, there is a possibility that the user will reverse without knowing. In addition, when it is difficult to visually confirm the orientation of the receptacle-side connector 24 installed in the projector 1 and the orientation of the insertion-side connector 31 of the USB cable 30, there is a higher possibility of reverse insertion. Therefore, it is very effective to apply the connector connection structure of this embodiment to such a USB connector (type A) to assist in preventing reverse insertion.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the scope of the invention. A modification will be described below.

  The connector connection structure of the embodiment shows a case where the receiving-side connector 24 is horizontally installed on the projector 1 and prevents the insertion-side connector 31 from being reversed upside down. However, the present invention can also be applied to the case where the receptacle-side connector 24 is installed vertically, and the reverse insertion of the insertion-side connector 31 due to the left-right reversal can be prevented.

  In the connector connection structure of the embodiment, the pressure sensor 25 is installed on the receiving-side connector 24 of the projector 1. However, the pressure sensor 25 may be installed in the USB cable 30 (plug-in side connector 31) connected to the receiving side connector 24. In this case, the connector connection structure of the present embodiment may be constructed in the electronic device connected to the USB cable 30.

  In the connector connection structure of the embodiment, the USB cable 30 (plug-in side connector 31) is connected to the receiving side connector 24 of the projector 1. However, the present invention is not limited to this connection, and an electronic device having a structure in which the plug-in side connector 31 is directly connected to the main body of the electronic device (for example, an auxiliary storage device) without using a cable may be connected. In this case, the pressure sensor 25 may be installed in the plug-in side connector 31 of the electronic device, and a connector connection structure may be constructed in the main body of the electronic device. Thus, even if the connector connection structure is not constructed on the projector 1 side, when the electronic device is inserted backward, it can be notified that the electronic device is reverse inserted.

  The connector connection structure of the embodiment is applied to a USB connector (type A). However, it may be applied to other connectors in which reverse insertion may be performed.

  In the embodiment, the connector connection structure is applied to the projector 1, but may be applied to an electronic device other than the projector 1.

  The projector 1 according to the embodiment includes the speaker 28 as a notification unit, and notifies the speaker 28 that the pressure has become equal to or higher than a predetermined pressure. However, the notification unit is not limited to the speaker 28, and a solid light emitting element such as an LED (Light Emitting Diode), a liquid crystal panel, or the like can be used. Then, the fact that the pressure has reached a predetermined pressure may be notified by light emission of the LED, or may be notified by displaying character information or image information on the liquid crystal panel.

  In the embodiment, the light modulation device uses the transmissive liquid crystal light valve 12, but a reflection light modulation device such as a reflection liquid crystal light valve can also be used. Also, a micromirror array device that modulates the light emitted from the light source 11 can be used by controlling the emission direction of the incident light for each micromirror as a pixel. For example, a DMD (Digital Micromirror Device) can be used as the micromirror array device.

  In the embodiment, the light source 11 uses the discharge type light source lamp 11a. The light source 11 can be configured using various solid light emitting elements such as a laser diode, an LED (Light Emitting Diode), an organic EL (Electro Luminescence) element, and a silicon light emitting element in addition to a discharge lamp.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 11 ... Light source, 12 ... Liquid crystal light valve (light modulation device), 20 ... Control part (notification control part), 24 ... USB connector (receiving side connector), 25 ... Pressure sensor, 28 ... Speaker (notification) Part), 31 ... USB connector (plug-in side connector), 242 ... terminal part, 243a ... tip surface.

Claims (7)

Connectors that can be inserted and removed from each other;
A pressure sensor that is installed in one of the connectors and detects pressure due to contact between the connector and the other connector;
An informing unit for informing information;
Based on the detection result of the pressure sensor, when the pressure is equal to or higher than a predetermined pressure, a notification control unit that notifies the notification unit that the predetermined pressure has been exceeded,
A connector connection structure characterized by comprising: The connector connection structure according to claim 1,
The pressure sensor includes a sheet-like gauge sensor,
The connector connection structure according to claim 1, wherein the gauge sensor is installed on a distal end surface of a terminal portion of one of the connectors. The connector connection structure according to claim 1 or 2,
The connector is a USB connector type A, and has a connector connection structure. A connector connected to an external device;
A pressure sensor that is installed in the connector and detects pressure due to contact with the connector;
An informing unit for informing information;
Based on the detection result of the pressure sensor, when the pressure is equal to or higher than a predetermined pressure, a notification control unit that notifies the notification unit that the predetermined pressure has been exceeded,
An electronic device comprising: The electronic device according to claim 4,
The electronic device is characterized in that the connector is a USB connector type A. A connector connected to an external device;
A pressure sensor that is installed in the connector and detects pressure due to contact with the connector;
An informing unit for informing information;
Based on the detection result of the pressure sensor, when the pressure is equal to or higher than a predetermined pressure, a notification control unit that notifies the notification unit that the predetermined pressure has been exceeded,
A light source that emits a luminous flux;
A light modulation device that modulates the luminous flux emitted from the light source based on an image signal;
A projector comprising: The projector according to claim 6, wherein
The connector is a type A USB connector.

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