JP5549737B2 - Electronics - Google Patents

Description

  The present disclosure relates to an electronic device.

  2. Description of the Related Art Conventionally, portable electronic devices such as mobile phones and notebook personal computers have been widely used.

  Many of such electronic devices are composed of a plurality of device parts that can be opened and closed with respect to each other in order to improve portability. In addition, there is also known a device in which a magnetic sensor or the like is mounted to detect the open / closed state of an electronic device, and the power is turned on when the magnetic sensor or the like detects the open state.

JP 2006-211019 A JP 2004-233119 A

  However, when the electronic device is carried with a bag or the like, there are cases where there is something that generates magnetism around the electronic device. And as a result of misidentifying such a magnetism as an open state of a magnetic sensor etc., there exists a possibility that the power supply of an electronic device may be turned on in the scene which a user does not intend.

  The above situation is not limited to a portable electronic device or an electronic device that is turned on when an open state is detected, but is generally applied to an electronic device that is equipped with a sensor for detecting opening and closing and performs some processing when the open state is detected. This is the situation that arises.

  In view of the above circumstances, it is an object of the present disclosure to provide an electronic device that can execute processing correctly in accordance with an open / close state.

  An electronic device that achieves the above object includes a first device portion and a second device portion that can be opened and closed with respect to the first device portion. The electronic device also includes a magnetic sensor, an optical sensor, and a processing execution circuit.

  The magnetic sensor detects opening and closing of the second device part with respect to the first device part. The optical sensor also detects opening and closing of the second device part with respect to the first device part.

  The processing execution circuit executes processing according to the open / closed state of the second device portion with respect to the first device portion, based on both the detection result by the magnetic sensor and the detection result by the optical sensor. It is.

  According to the electronic device of the present disclosure, it is possible to execute a process that properly corresponds to the open / close state.

1 is a diagram illustrating a notebook personal computer corresponding to a specific first embodiment of an electronic device. It is the figure shown in more detail about the periphery of an optical sensor. It is a figure which shows the movement mechanism of an optical sensor in the state when a notebook PC opens. It is a figure which shows the movement mechanism of an optical sensor in the state when a notebook PC is closed. It is a figure which shows a power supply control circuit. It is a flowchart when the cover part of a notebook PC is opened. It is a timing chart of various signals when the cover part of a notebook PC is opened. It is a timing chart which shows operation of a comparative example to the 1st malfunction of a magnetic sensor. It is a timing chart which shows operation of a comparative example to the 2nd malfunction of a magnetic sensor. It is a timing chart which shows operation | movement of 1st Embodiment with respect to the 1st malfunction of a magnetic sensor. It is a timing chart which shows operation of a 1st embodiment to the 2nd malfunction of a magnetic sensor. It is a flowchart when the cover part of a notebook PC is closed. It is a timing chart of various signals when the cover part of a notebook PC is closed. It is a figure which shows 2nd Embodiment. It is a figure which shows the moving mechanism of the optical sensor in 2nd Embodiment in the state when a notebook PC opens. It is a figure which shows a state when a notebook PC closes the moving mechanism of the optical sensor in 2nd Embodiment. It is a figure which shows 3rd Embodiment.

  Specific embodiments of the electronic apparatus will be described below with reference to the drawings.

  FIG. 1 is a diagram illustrating a notebook personal computer (hereinafter referred to as a notebook PC) corresponding to a specific first embodiment of an electronic apparatus.

  The notebook PC 100 has a structure in which a main body portion 101 and a lid portion 102 are connected by a hinge. Therefore, the lid portion 102 can be opened and closed with respect to the main body portion 101. Part (A) of FIG. 1 shows a state in which the lid portion 102 is open with respect to the main body portion 101. Further, part (B) of FIG. 1 shows a state in which the lid portion 102 is closed with respect to the main body portion 101. The main body portion 101 corresponds to an example of a first device portion of the electronic device. The lid portion 102 corresponds to an example of a second device portion of the electronic device.

  The notebook PC 100 is equipped with a magnetic sensor 103 and an optical sensor 104 for detecting the open / closed state of the lid portion 102 with respect to the main body portion 101. The magnetic sensor 103 corresponds to an example of the magnetic sensor of the electronic device. The optical sensor 104 corresponds to an example of the optical sensor of the electronic device.

  The magnetic sensor 103 includes a main body side sensor portion 103a and a lid side sensor portion 103b. One of the main body side sensor portion 103a and the lid side sensor portion 103b emits magnetism, and the other detects the magnetism. When the main body side sensor portion 103a and the lid side sensor portion 103b approach each other and magnetism is detected, it is detected that the lid portion 102 is closed with respect to the main body portion 101. Conversely, when the main body side sensor portion 103a and the lid side sensor portion 103b are moved away from each other and the magnetic detection is interrupted, it is detected that the lid portion 102 is open with respect to the main body portion 101. Since the optical sensor 104 is provided at a position where the lid portion 102 faces the main body portion 101, the optical sensor 104 is sandwiched between the lid portion 102 and the main body portion 101 when the lid portion 102 is closed with respect to the main body portion 101. Does not detect light. The optical sensor 104 detects light when the lid portion 102 opens with respect to the main body portion 101. The optical sensor 104 is used as an auxiliary to the magnetic sensor 103 in the first embodiment, as will be described in detail later. In the following description, for convenience of explanation, when the lid portion 102 is in an open state (closed state) with respect to the main body portion 101, the notebook PC 100 may simply be referred to as being in an open state (closed state).

  FIG. 2 is a diagram showing the periphery of the optical sensor 104 in more detail.

  Part (A) of FIG. 2 shows a perspective view of the notebook PC 100 in an open state. 2 shows a side view of the notebook PC 100 in the open state. Furthermore, a side view of the notebook PC 100 in the closed state is shown in Part (C) of FIG. In the side views of part (B) and part (C), a part of the internal structure is shown through.

  The lid portion 102 of the notebook PC 100 is provided with a light detection window 105 through which the optical sensor 104 looks. The light passing through the light detection window 105 is detected by the light sensor 104. The notebook PC 100 opens and closes by rotation around the hinge 106. As shown in Part (B), when the notebook PC 100 is in the open state, the optical sensor 104 is located immediately behind the light detection window 105. For this reason, the optical sensor 104 can detect external light emitted from other than the notebook PC 100 and can also detect backlight light emitted from the liquid crystal display 102 a provided in the lid portion 102. In this way, the optical sensor 104 detects the light emitted by the liquid crystal display 102a itself, so that the optical sensor 104 can detect the open state even when the notebook PC 100 is in the open state in a dark place. . This means that the following application forms are suitable. This preferred application mode includes a self-luminous display device mounted on the second device portion. In this application mode, the optical sensor detects light emitted from the display device.

  The liquid crystal display 102a corresponds to an example of a self-luminous display device in this application mode. The optical sensor 104 also corresponds to an example of the optical sensor in this application mode.

  When the notebook PC 100 is in the closed state, the optical sensor 104 is located away from the light detection window 105 and behind the lid portion 102 as shown in Part (C). For this reason, when the notebook PC 100 is in the closed state, the optical sensor 104 is arranged so that it is difficult to detect light including outside light. Therefore, even if the liquid crystal display 102 a emits light when the notebook PC 100 is in the closed state, the light of the liquid crystal display 102 a does not enter the optical sensor 104.

  A moving mechanism that moves the position of the optical sensor 104 will be described in more detail.

  FIG. 3 is a diagram illustrating a moving mechanism of the optical sensor 104. FIG. 3 shows a state when the notebook PC is opened.

  FIG. 3 shows the above-described photosensor 104, photodetection window 105, and hinge 106. When the lid portion 102 (see FIG. 1) of the notebook PC 100 is opened with respect to the main body portion 101 (see FIG. 1), the hinge 106 is relative to the optical sensor 104 and the light detection window 105 provided in the lid portion 102. Therefore, it rotates in the direction of arrow A shown in FIG. The hinge 106 and the optical sensor 104 are connected by a wire 107. The optical sensor 104 is urged from the back side of the lid portion 102 toward the light detection window 105 by a push spring 108. When the notebook PC 100 is opened and the hinge 106 is rotated in the direction of arrow A, the wire 107 connected to the hinge 106 is fed out in the direction of arrow B shown in FIG. As a result, the photosensor 104 is pushed out in the direction of arrow C shown in FIG. 3 by the push spring 108 and is positioned immediately behind the photodetection window 105. When the optical sensor 104 comes to such a position, as described above, when the notebook PC 100 is in the open state, the optical sensor 104 can also detect light from the liquid crystal display 102a.

  FIG. 4 is also a diagram showing a moving mechanism of the optical sensor 104. FIG. 4 shows a state when the notebook PC is closed.

  When the lid portion 102 (see FIG. 1) of the notebook PC 100 is closed with respect to the main body portion 101 (see FIG. 1), the hinge 106 is relative to the light sensor 104 and the light detection window 105 provided in the lid portion 102. Therefore, it rotates in the direction of arrow D shown in FIG. As a result of such rotation of the hinge 106, the wire 107 connected to the hinge 106 is drawn in the direction of arrow E shown in FIG. The optical sensor 104 is separated from the light detection window 105 by being pulled in the direction of arrow F shown in FIG. 4 against the urging force of the push spring 108. Since the optical sensor 104 is drawn in this way, as described above, no light enters the optical sensor 104 when the notebook PC 100 is in the closed state.

  According to the moving mechanism described above, the optical sensor 104 can detect the open / close state of the notebook PC 100 more accurately. This means that the following application forms are suitable. In this application mode, the optical sensor is moved to the first position in the open state as the second device portion is opened and closed, and in the closed state, the optical sensor is more than in the case where the optical sensor is present at the first position. A moving mechanism for moving to a second position where light is not easily incident is provided. The moving mechanism shown in FIGS. 3 and 4 corresponds to an example of the moving mechanism in this preferred application mode.

  By the way, in the notebook PC 100, a power control circuit for turning on / off the power according to opening / closing of the notebook PC 100 is provided. In this power supply control circuit, detection by the optical sensor 104 is used as an auxiliary to detection by the magnetic sensor 103.

  FIG. 5 is a diagram illustrating a power supply control circuit.

  The power supply control circuit 109 includes a power-on control circuit 110 and a malfunction prevention circuit 111. The power-on control circuit 110 is a circuit that turns on the main power supply of the notebook PC 100 in response to detection of the open state by the magnetic sensor 103. The malfunction prevention circuit 111 is a circuit for correcting power-on due to erroneous detection of the magnetic sensor 103. The power supply control circuit 109 corresponds to an example of a processing execution circuit in the electronic device.

  Note that the notebook PC 100 also has an auxiliary power supply for keeping the power-on control circuit 110 and the like in a standby state when the main power supply is in an off state, but since this is not the subject of the present disclosure, further explanation will be given. Is omitted.

  The power-on control circuit 110 includes a magnetic sensor input terminal 110a and a malfunction prevention signal input terminal 110b. The output of the magnetic sensor 103 is connected to the magnetic sensor input terminal 110a. The power-on control circuit 110 turns on the main power supply when a rising signal is input to the magnetic sensor input terminal 110a. The malfunction prevention signal output terminal 111c of the malfunction prevention circuit 111 is connected to the malfunction prevention signal input terminal 110b. The power-on control circuit 110 turns off the main power supply when a falling signal is input to the malfunction prevention signal input terminal 110b.

  Note that the power-on control circuit 110 does not particularly react to the input of the falling signal to the magnetic sensor input terminal 110a and the input of the rising signal to the malfunction prevention signal input terminal 110b. The power-on control circuit 110 outputs the main power supply from the power supply output terminal 110 c to various places in the notebook PC 100.

  The malfunction prevention circuit 111 includes a power input terminal 111a and an optical sensor input terminal 111b. A power output terminal 110c of the power-on control circuit 110 is connected to the power input terminal 111a. The output of the optical sensor 104 is connected to the optical sensor input terminal 111b. The malfunction prevention circuit 111 includes an AND mask circuit 112 and a latch circuit 113 with a timer. The AND mask circuit 112 performs an AND operation of turning on / off the power output input to the power input terminal 111a and turning on / off the light sensor output input to the light sensor input terminal 111b. The timer-equipped latch circuit 113 starts a 5-second timer at the rise of the power supply output input to the power input terminal 111a, and latches the output of the AND mask circuit 112 when 5 seconds elapse. The output of the latch circuit 113 with a timer is output from the malfunction prevention signal output terminal 111c. The output of the malfunction prevention signal output terminal 111c is input to the malfunction prevention signal input terminal 110b of the power-on control circuit 110 as described above.

  As will be described in detail later, according to such a power supply control circuit 109, it is possible to control the power supply of the notebook PC 100 by executing a process that properly corresponds to the open / closed state of the notebook PC 100. The power supply control circuit 109 also corresponds to an example of a processing execution circuit having the following application form. In this application mode, the processing execution circuit includes a power supply circuit and a malfunction prevention circuit. The power supply circuit is a power supply circuit that supplies electric power to the electronic device, and is turned on when the magnetic sensor detects an open state of the second device portion. The malfunction prevention circuit waits for a predetermined time when the power supply circuit is turned on, and returns the power supply circuit to the off state when the optical sensor does not detect the open state of the second device portion even after the standby. According to such an application form, it is possible to accurately control the power supply of the electronic device by appropriately supplementing the detection by the magnetic sensor with the detection by the optical sensor.

  The power-on control circuit 110 in the first embodiment corresponds to an example of a power supply circuit in this application mode. Further, the malfunction prevention circuit 111 in the first embodiment corresponds to an example of the malfunction prevention circuit in this application form.

  Hereinafter, the operation of the power supply control circuit 109 will be described in detail.

  FIG. 6 is a flowchart when the lid portion 102 of the notebook PC 100 is opened. FIG. 7 is a timing chart of various signals when the lid portion 102 of the notebook PC 100 is opened. Here, FIG. 6 and FIG. 7 will be described together.

  When the lid portion 102 on which the liquid crystal display (LCD) 102a is mounted is opened, the main body side sensor portion 103a and the lid side sensor portion 103b shown in FIG. 1 move away from each other. Thereby, the magnetic sensor 103 detects the open state of the lid portion 102 with respect to the main body portion 101. The magnetic sensor output signal 201 (see FIG. 7) rises at time t1.

  When the notebook PC 100 is in a suspended state or a hibernate state, the power-on control circuit 110 turns on the main system power supply in response to the rise of the magnetic sensor output signal 201 (step S101 in FIG. 6). As a result, the apparatus power supply output signal 202 (see FIG. 7) also rises at time t1. As the power supply rises in this way, power is also supplied to the latch circuit 113 with timer of the malfunction prevention circuit 111 shown in FIG. The output of the timer-equipped latch circuit 113 (that is, the malfunction prevention signal 206; see FIG. 7) is turned on (Hi) at time t1. Further, from the time t1, the timer-equipped latch circuit 113 starts waiting for 5 seconds.

  When the lid portion 102 is opened in step S101, the hinge 106 rotates as shown in FIG. 3 (step S102 in FIG. 6). Then, as described with reference to FIG. 3, the optical sensor 104 moves to the light detection window 105 side as the hinge 106 rotates (step S103 in FIG. 6). As a result of the movement, the light sensor 104 receives light from the light detection window 105. Then, the optical sensor output signal 203 (see FIG. 7) rises at time t2 (step S104 in FIG. 6). Even when the lid portion 102 is opened in a dark place, the optical sensor 104 receives the light emitted from the liquid crystal display 102a itself, so that the optical sensor output signal 203 rises at time t2. When the optical sensor output signal 203 rises in this way, the input of the AND mask circuit 112 of the malfunction prevention circuit 111 shown in FIG. 5 is turned on and on, so that the mask circuit output signal 204 (see FIG. 7) also rises at time t2. .

  Thereafter, when a waiting time of 5 seconds in the latch circuit with timer 113 of the malfunction prevention circuit 111 shown in FIG. 5 elapses, the latch circuit with timer 113 latches the output of the AND mask circuit 112 (step S105 in FIG. 6). The latch timing is time t3 when the input latch signal 205 (see FIG. 7) rises.

  Since the mask circuit output signal 204 is on (Hi) at time t3, the malfunction prevention signal 206 (see FIG. 7) that is the output of the latch circuit 113 with the timer remains on (Hi) after time t3. Become. Therefore, the output of the power-on control circuit 110 (that is, the apparatus power supply output signal 202) in which the malfunction prevention signal 206 is input to the malfunction prevention signal input terminal 110b is also maintained in the on state (step S106 in FIG. 6).

  As described above, in the first embodiment, the power supply is turned on accurately in response to the opening of the lid portion 102. Next, a case where the magnetic sensor 103 malfunctions due to the influence of external magnetism will be described. Before describing the operation in the first embodiment, a malfunction in the comparative example will be described. In this comparative example, the power supply control circuit includes only the power-on control circuit 110 shown in FIG. And a power supply starts only according to the detection result by the magnetic sensor 103.

  FIG. 8 is a timing chart showing the operation of the comparative example with respect to the first malfunction of the magnetic sensor.

  In the comparative example, when the magnetic sensor output signal 301 rises to an on (Hi) state due to a malfunction due to the influence of external magnetism, the device power supply output signal 302 also rises. And since there is no function for correcting malfunction, the power supply remains on.

  In the example shown here, since the ON state due to malfunction is a short pulse ON state, a timer function is incorporated in the power-on control circuit 110 and the output of the magnetic sensor is confirmed again after a certain waiting time. Then, it seems that the malfunction can be corrected. However, the malfunction of the magnetic sensor due to the influence of external magnetism does not necessarily become a pulsed ON state, but may be a continuous ON state as shown below.

  FIG. 9 is a timing chart showing the operation of the comparative example with respect to the second malfunction of the magnetic sensor.

  In the example shown here, the magnetic sensor output signal 303 rises to an on (Hi) state due to a malfunction due to the influence of external magnetism, and the on state is maintained thereafter. In the comparative example, the device power output signal 304 rises also in this case. And since there is no function for correcting malfunction, the power supply remains on.

  Thus, in the comparative example, the rise of the power supply due to the malfunction of the magnetic sensor cannot be corrected. On the other hand, in the notebook PC 100 of the first embodiment, as will be described below, it is possible to accurately cope with a malfunction of the magnetic sensor.

  FIG. 10 is a timing chart showing the operation of the first embodiment for the first malfunction of the magnetic sensor.

  Here, the magnetic sensor output signal 211 rises to an on (Hi) state at time t4 due to a malfunction due to the influence of external magnetism. In response to such a rise, the power-on control circuit 110 turns on the main power supply. As a result, the apparatus power supply output signal 212 also rises at time t4. As described above, the power supply is also supplied to the latch circuit 113 with timer of the malfunction prevention circuit 111 shown in FIG. 5 as described above. Then, the output of the timer-equipped latch circuit 113 (that is, the malfunction prevention signal 216) is turned on (Hi) at time t4. In addition, from time t4, the timer-equipped latch circuit 113 starts waiting for 5 seconds.

  On the other hand, since the lid portion 102 is not opened, no light enters the optical sensor 104. Therefore, the optical sensor output signal 213 remains in the off (Lo) state. That is, one of the inputs of the AND mask circuit 112 of the malfunction prevention circuit 111 shown in FIG. 5 remains off. For this reason, the mask circuit output signal 214 also remains in the off (Lo) state.

  After that, the input latch signal 215 rises at time t5 when the 5-second standby time in the timer-equipped latch circuit 113 of the malfunction prevention circuit 111 shown in FIG. Then, the latch circuit with timer 113 latches the output of the AND mask circuit 112 at the rising time t5. Since the mask circuit output signal 214 remains in the off (Lo) state at time t5, the malfunction prevention signal 216, which is the output of the latch circuit 113 with the timer, falls at time t5. The output of the power-on control circuit 110 in which the malfunction prevention signal 216 is input to the malfunction prevention signal input terminal 110b (that is, the apparatus power supply output signal 212) is turned off at time t5. That is, the rise of the power supply due to the malfunction of the magnetic sensor is corrected.

  Such correction also occurs in the case of malfunctions that are continuously turned on as described in FIG.

  FIG. 11 is a timing chart showing the operation of the first embodiment with respect to the second malfunction of the magnetic sensor.

  In the second malfunction, the magnetic sensor output signal 221 rises to the on (Hi) state at time t6, and the on state is maintained thereafter.

  In response to the rising edge of the magnetic sensor output signal 221, the power-on control circuit 110 turns on the main power supply. As a result, the device power supply output signal 222 also rises at time t6. As the power supply rises, power is also supplied to the latch circuit 113 with timer, and the output (that is, the malfunction prevention signal 226) of the latch circuit 113 with timer is turned on (Hi) at time t6. In addition, from time t6, the timer-equipped latch circuit 113 starts waiting for 5 seconds.

  On the other hand, since the lid portion 102 is not opened during the second malfunction, no light enters the optical sensor 104. Therefore, the photosensor output signal 223 which is one of the inputs in the AND mask circuit 112 of the malfunction prevention circuit 111 shown in FIG. 5 remains in the off (Lo) state. Therefore, the mask circuit output signal 224 also remains in the off (Lo) state.

  Thereafter, the input latch signal 225 rises at time t7 when the 5-second standby time in the timer-equipped latch circuit 113 of the malfunction prevention circuit 111 shown in FIG. Then, the latch circuit with timer 113 latches the output of the AND mask circuit 112 at the rising time t7. Since the mask circuit output signal 224 remains off (Lo) at time t7 even during the second malfunction, the malfunction prevention signal 226 output from the timer-equipped latch circuit 113 falls at time t7. Then, the output of the power-on control circuit 110 in which the malfunction prevention signal 226 is input to the malfunction prevention signal input terminal 110b (that is, the apparatus power supply output signal 222) is turned off at time t7. In other words, the rise of the power supply due to the malfunction of the magnetic sensor is also corrected during the second malfunction.

  Next, an operation when the lid portion 102 of the notebook PC 100 is closed will be described.

  FIG. 12 is a flowchart when the lid portion 102 of the notebook PC 100 is closed. FIG. 13 is a timing chart of various signals when the lid portion 102 of the notebook PC 100 is closed. Here, FIG. 12 and FIG. 13 will be described together.

  When the lid portion 102 on which the liquid crystal display (LCD) 102a is mounted is closed, the main body side sensor portion 103a and the lid side sensor portion 103b shown in FIG. 1 approach each other. Thereby, the magnetic sensor 103 detects the closed state of the lid portion 102 with respect to the main body portion 101. Then, the magnetic sensor output signal 231 (see FIG. 13) falls at time t8 (step S201 in FIG. 12). However, as described above, the power-on control circuit 110 does not particularly react to the fall of the magnetic sensor output signal 231.

  On the other hand, when the lid portion 102 starts to close in step S201, the hinge 106 rotates as shown in FIG. 4 (step S202 in FIG. 12). Then, as described with reference to FIG. 4, the optical sensor 104 moves away from the light detection window 105 as the hinge 106 rotates (step S203 in FIG. 12). As a result of the movement, the light sensor 104 cannot receive the light from the light detection window 105, so that the light sensor output signal 233 (see FIG. 13) falls by time t8 (step S204 in FIG. 12).

  When the optical sensor output signal 223 falls in this way, one of the inputs of the AND mask circuit 112 of the malfunction prevention circuit 111 shown in FIG. 5 is turned off, so that the mask circuit output signal 234 (see FIG. 13) is also at time t8. Fall down.

  Since the latch circuit 113 with timer of the malfunction prevention circuit 111 shown in FIG. 5 does not perform the timer operation, the input latch signal 235 (see FIG. 13) does not particularly rise, but the latch circuit 113 with timer outputs the mask circuit output signal 234. It is always latched at the clock cycle. The timer-equipped latch circuit 113 immediately latches the falling edge of the mask circuit output signal 234 (see FIG. 13) at time t8. As a result, the malfunction prevention signal 236 (see FIG. 13), which is the output of the latch circuit 113 with the timer, also falls at time t8 (step S205).

  Then, the power-on control circuit 110 in which the malfunction prevention signal 236 is input to the malfunction prevention signal input terminal 110b receives the fall of the malfunction prevention signal 236, and the main power supply (that is, the apparatus power supply output signal 232; see FIG. 13). Is turned off. As a result, the notebook PC 100 shifts to a suspended state or a hibernate state according to the setting state (step S206 in FIG. 12).

  Thus, in the first embodiment, the power supply is turned off in accordance with the fact that the lid portion 102 is closed.

  This is the end of the description of the first embodiment. Hereinafter, the second embodiment will be described. Since the second embodiment is the same as the first embodiment except for the moving mechanism that moves the optical sensor with respect to the light detection window, the following description will focus on the moving mechanism.

  FIG. 14 is a diagram illustrating a second embodiment.

  Part (A) of FIG. 14 shows the open state of the notebook PC 400 of the second embodiment. Moreover, the closed state of the notebook PC 400 is shown in part (B) of FIG.

  In the notebook PC 400 of the second embodiment, the optical sensor 401 is located immediately behind the light detection window 105 when the notebook PC 400 is in the open state. For this reason, the optical sensor 401 can detect external light emitted from other than the notebook PC 400 and can also detect backlight light emitted from the liquid crystal display.

  When the notebook PC 400 is in the closed state, the photosensor 401 moves from the photodetection window 105 in the horizontal direction as shown in Part (B). For this reason, when the notebook PC 400 is in the closed state, the optical sensor 401 is arranged so that it is difficult to detect light including outside light.

  A moving mechanism that moves the position of the optical sensor 401 will be described in more detail.

  FIG. 15 is a diagram illustrating a moving mechanism of the optical sensor 401 in the second embodiment. FIG. 15 shows a state when the notebook PC is opened.

  FIG. 15 shows an optical sensor 401, an optical detection window 105, and a hinge 106. When the notebook PC 400 is opened from the closed state, the hinge 106 is rotated in the direction of the arrow G shown in FIG.

  The hinge 106 and the optical sensor 401 are connected by a wire 402. Further, the optical sensor 401 is biased toward the light detection window 105 by a push spring 403. When the notebook PC 400 is opened and the hinge 106 is rotated in the direction of arrow G, the wire 402 connected to the hinge 106 is drawn out in the direction of arrow H shown in FIG. As a result, the optical sensor 401 is pushed out in the direction of arrow I shown in FIG. 15 by the push spring 403 and is positioned immediately behind the light detection window 105.

  FIG. 16 is also a diagram showing a moving mechanism of the optical sensor 401. FIG. 16 shows a state when the notebook PC is closed. When the notebook PC 400 is closed from the open state, the hinge 106 rotates relative to the optical sensor 401 and the light detection window 105 in the direction of arrow J shown in FIG. As a result of such rotation of the hinge 106, the wire 402 connected to the hinge 106 is drawn in the direction of the arrow K shown in FIG. The optical sensor 401 is displaced in the lateral direction with respect to the light detection window 105 by being pulled in the direction of the arrow L shown in FIG. 16 against the urging force of the pressing spring 403. As described above, the light sensor 401 is displaced with respect to the light detection window 105, so that no light enters the light sensor 401 when the notebook PC 400 is in the closed state.

  Thus, the optical sensor 401 can be moved to a desired position even with the movement mechanism of the second embodiment.

  This is the end of the description of the second embodiment, and the third embodiment will be described below. Since the third embodiment is the same as the first embodiment except that the position of the photosensor is different and the moving mechanism of the photosensor is omitted, the following focuses on the photosensor. I will explain.

  FIG. 17 is a diagram illustrating a third embodiment.

  Part (A) of FIG. 17 shows a perspective view of the notebook PC 500 in the open state. In addition, a part (B) of FIG. 17 shows a side view of the notebook PC 500 in an open state. Furthermore, a side view of the notebook PC 500 in the closed state is shown in part (C) of FIG.

  In the notebook PC 500 of the third embodiment, the optical sensor 501 is disposed above the lid portion 102. For this reason, the optical sensor 501 easily detects external light emitted from other than the notebook PC 500. Further, even if the optical sensor 501 is provided at such a position, the optical sensor 501 can detect light emitted from the liquid crystal display 102 a provided in the lid portion 102 itself.

  Unlike the first and second embodiments, the third embodiment does not have a moving mechanism for the optical sensor 501. For this reason, as shown in Part (C), the optical sensor 501 is positioned on the front side of the lid portion 102 (that is, the side where the liquid crystal display 102a is provided) even when the closed state is reached.

  The notebook PC 500 according to the third embodiment has a simple structure as long as it does not have a moving mechanism, and therefore has higher durability than the first and second embodiments.

  In addition, the third embodiment does not have a moving mechanism, so that the light shielding property of the optical sensor 501 in the closed state is lower than that of the first embodiment or the second embodiment, but a basic advantage regarding the opening / closing detection. Is also exhibited in this structure.

  This is the end of the description of each embodiment.

  In each of the embodiments described above, open / close detection by a magnetic sensor is mainly used, and open / close detection by an optical sensor is used as an auxiliary. However, the electronic device disclosed herein mainly uses open / close detection by an optical sensor, and the magnetic sensor. The opening / closing detection by may be used as an auxiliary.

  In each of the above-described embodiments, a backlight type liquid crystal display is employed, but an organic EL display or the like may be employed as a self-luminous display. In addition, the electronic device disclosed herein may include a reflective liquid crystal display or may not include a display device.

100 notebook PC
DESCRIPTION OF SYMBOLS 101 Main body part 102 Cover part 103 Magnetic sensor 103a Main body side sensor part 103b Cover side sensor part 104 Photosensor 102a Liquid crystal display 105 Photodetection window 106 Hinge 107 Wire 108 Push spring 109 Power supply control circuit 110 Power-on control circuit 111 Malfunction prevention circuit 112 AND mask circuit 113 Latch circuit with timer

Claims (3)

A first device portion;
A second device part that is openable and closable with respect to the first device part;
A magnetic sensor for detecting opening and closing of the second device part relative to the first device part;
An optical sensor for detecting opening and closing of the second device part relative to the first device part;
A processing execution circuit that executes processing according to the open / closed state of the second device portion with respect to the first device portion, based on both the detection result by the magnetic sensor and the detection result by the optical sensor. ,
The processing execution circuit includes:
A power supply circuit for supplying power to the electronic device, the power supply circuit being turned on when the magnetic sensor detects an open state of the second device portion;
A malfunction prevention circuit that waits for a predetermined time when the power supply circuit is turned on and returns the power supply circuit to an off state when the optical sensor does not detect an open state of the second device portion even after the standby. An electronic device characterized by being a thing. As the second device portion is opened and closed, the photosensor is moved to the first position in the open state, and in the closed state, light is transmitted to the photosensor than when the photosensor is present at the first position. The electronic apparatus according to claim 1, further comprising a moving mechanism that moves the second position to a second position where it is difficult for light to enter. A self-luminous display device mounted on the second device portion;
The optical sensor according to claim 1 Symbol mounting electronic devices, characterized in that it is intended to detect light the display device emitted.

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