TWI385654B - The control circuit of hard disk lights and a light module - Google Patents

Description

Hard disk signal control circuit and light module

The present invention relates to a control circuit for a hard disk light, and more particularly to a control circuit for a hard disk light module.

FIG. 1 is a diagram showing a server system of a multi-master board. Referring to FIG. 1, in some server systems, such as server system 100, there are a plurality of motherboards 121, 122, 123, and 124. In the server system 100, a plurality of power supplies 111, 112 are also disposed to supply the power required for the operation of the motherboards 121, 122, 123, and 124. Among them, the power supply 111 is used to supply the power required for the motherboards 121 and 122, and the power supply 112 is used to supply the power required for the motherboards 123 and 124.

Further, in the server system 100, a plurality of hard disks are also arranged. The hard disk can be configured with an indicator light that can be illuminated when the hard disk is activated to let the user know the current condition of the hard disk.

2 is a circuit diagram of a conventional hard disk light module. Referring to FIG. 2, in the conventional hard disk lamp number 200, a switch 220, a power source 230, an electric group 240, and a light-emitting element 250 are included. The light-emitting element 250 can be an indicator light of the hard disk 210, and the switch 220 is a transistor. The gate of the switch 220 is coupled to the signal output end of the hard disk 210, the drain is coupled to the cathode end of the diode 250, and the source is grounded. The power source 230 is coupled to the anode terminal of the transistor 250 by a resistor 240. When the hard disk 210 is activated, the signal output terminal of the hard disk 210 outputs a high potential signal HS, so the switch 220 is turned on, so that the power source 230 turns on the light emitting element 250 via the resistor 240, so the finger of the hard disk 210 The indicator light will illuminate.

Referring to FIG. 1 and FIG. 2, the motherboards 121 and 122 of FIG. 1 can be configured with a plurality of hard disk and light module, such as the hard disk 210 and the light module 200, because the power supply 111 is coupled to the host. The boards 121 and 122, therefore, when the motherboard 121 is in operation, the power supply 111 provides power, and all of the motherboards 121, 122 to which it is coupled are supplied with a power source. In other words, the motherboard 122, which is not in operation, is also powered by the power supply. The non-operating hard disk inside the motherboard 122 provides a high-potential signal HS to the lamp module 200, so that the switch 220 is turned on, and the light-emitting element 250 is turned on, so that the non-working hard disk is also sent. bright. Therefore, such a situation may cause the user to confuse the working state of the hard disk, and also make it difficult for the user to judge the condition under the operation of the hard disk.

Therefore, the present invention provides a control circuit and a lamp number module for a hard disk light, which can control the light number of the hard disk, and clearly display the operating state of the hard disk in the light number, so that the user can clearly understand the operating condition of the hard disk. .

The invention provides a control circuit for a hard disk light, wherein the hard disk light is generated by a first light emitting element. The control circuit of the hard disk light includes a first diode and a first switch. The cathode end of the first diode is configured to receive the first control signal. In addition, the first switch is coupled to the anode end of the first diode for determining whether to turn on the power to the first illuminating component according to the state of the anode end of the first diode, and generating the hard disk signal .

In addition, the first switch of the control circuit is a transistor, the source terminal is coupled to the power source, and the gate terminal and the 汲 terminal are respectively coupled to the first diode and the first illuminant. Pieces. Further, the first light emitting element is a first light emitting diode.

In an embodiment of the invention, the control circuit of the hard disk light further includes a second diode, a first resistor and a second resistor. The second diode is disposed on the path between the first switch and the first diode, and the cathode end of the second diode is coupled to the anode end of the first diode. The first resistor is used to couple the anode end of the second diode to the first switch. The second electrical group is configured to couple the first switch to the first light emitting component.

From another point of view, the present invention also provides a lamp module suitable for a hard disk device, comprising a first light emitting element, a second light emitting element, and a control circuit. The control circuit is coupled to the second illuminating component and controls whether the second illuminating component emits light or not, and the control circuit has a switch for coupling the first illuminating component to the power source. When the switch is turned on, the power source is used for the point. The first light-emitting element is illuminated.

In an embodiment of the invention, the control circuit of the lamp module includes a first diode, a second diode, a third diode, and a first resistor. The cathode end of the first diode is coupled to the first control signal and the second light emitting element. In addition, the cathode end of the second diode is coupled to the anode end of the first diode. The cathode end of the third diode is coupled to the second control signal and the second light emitting element, and the anode end is coupled to the cathode end of the second diode. In addition, the first resistor is configured to couple the anode end of the second diode through the output end of the control circuit to the switch.

In addition, the second light emitting element of the light module is a second light emitting diode. The cathode end is coupled to the first control signal and the cathode end of the first diode, and the anode end of the second LED is coupled to the second control signal and The cathode end of the third diode. The switch is a first transistor, the source terminal is coupled to the power source, and the gate terminal is coupled to the output terminal of the control circuit.

In an embodiment of the invention, the light module further includes a third light emitting element, a second transistor, a second resistor, a third resistor, and a fourth resistor. Wherein, the three light-emitting elements are realized by the third light-emitting diode, wherein the anode end of the third light-emitting diode is coupled to the first control signal and the cathode end of the first diode, and the third light-emitting diode The cathode end is coupled to the second control signal and the cathode end of the second diode. The first resistor is configured to couple the first end of the first transistor to the first light emitting element. The second transistor has its 汲 terminal coupled to the first illuminating element and the source terminal to ground. The third resistor is used to couple the gate terminal of the second transistor to the hard disk device to receive a working signal. One end of the fourth resistor is coupled to the hard disk device together with the third resistor, and the other end of the fourth resistor can be coupled to the power source.

Since the control circuit and the lamp number module of the hard disk light of the present invention can control the light number so that the hard disk is in the state of being used, the light signal is displayed to avoid confusion of the working state of the hard disk. It also allows the user to more accurately define the status of the hard disk operation.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

FIG. 3 is a schematic diagram of a multiple hard disk system. Referring to FIG. 3, the multiple hard disk system 300 includes hard disk groups 320 and 340, which can be controlled by, for example, different motherboards in FIG. Each hard disk group has a different display A light number, such as 321 and 341, is used to display the status of the respective hard disk group. In the present embodiment, the display lamps 321 and 341 can be realized by a light-emitting element such as a light-emitting diode.

4 is a circuit diagram of a lamp module in accordance with a preferred embodiment of the present invention. Referring to FIG. 4, the light module 400 of the present embodiment can be applied to, for example, the multiple hard disk system 300 disclosed in FIG. In the lamp module 400, it includes at least a first light-emitting element 421, which may be a display light number 321 or 341 in the multi-hard disk system 300. As described above, the first light emitting element 421 may be a light emitting diode. In addition, the light module 400 may further include a control circuit 450, a second switch 442, a third resistor 433, and a fourth resistor 434. The anode end of the first light-emitting element 421 can be coupled to the control circuit 450, and the cathode end can be grounded through the second switch 442. In addition, one end of the third resistor 433 can be coupled to the switch 442, and the other end can be coupled to the hard disk device 460 at one end of the fourth resistor 434, and the other end of the fourth resistor can be coupled to a power source P2. .

In the present embodiment, the second switch 442 can be implemented using a transistor. The drain terminal of the switch 442 can be coupled to the cathode end of the second light emitting element, the source terminal can be grounded, and the gate terminal can be coupled to the hard disk 460 through the third resistor 433.

On the other hand, the control circuit 450 may include at least a first diode 411, a first resistor 431, a first switch 441, and a second resistor 432. The cathode end of the first diode 411 can be coupled to the first control signal CS1, and the anode end can be coupled to the switch 441 through the first resistor 431. In this embodiment, the first switch 441 can be a transistor, and the source terminal of the transistor can be coupled. The power supply P1 and the NMOS terminal may be coupled to the anode end of the first illuminating element 421 through the second resistor 432, and the gate terminal of the first switch 441 may be coupled to the yang of the first diode 441 through the first resistor 431. extreme. In the present embodiment, the potential of the power source P1 may be equal to the potential of the power source P2.

In some embodiments, the control circuit 450 can also include a second diode 412 and a third diode 413. The second diode 412 can be disposed on the coupling path between the first diode 411 and the first resistor 431. The cathode end can be coupled to the anode end of the first diode 411, and the anode end can be coupled to the anode end. The first resistor 431 can be coupled to the gate terminal of the switch 441. In addition, the cathode terminal of the third diode 413 can receive the second control signal CS2, and the anode terminal can be coupled to the cathode terminal of the second diode 412 together with the first diode 441.

FIG. 5 is a diagram showing a display light number in a hard disk state. Referring to FIG. 4 and FIG. 5 together, the first control signal CS1 and the second control signal CS2 can be generated by the motherboard controlling the hard disk device 460. When the motherboard controlling the hard disk device 460 is activated, at least one of the first control signal CS1 and the second control signal CS2 may be in a low potential (L) state. At this time, at least one of the first diode 441 and the third diode 413 is turned on, and the second diode 412 is also turned on. Since the transistor of the first switch 441 can be of the P-channel type, the first switch 441 is also turned on, so that the power source P1 can be transmitted to the anode terminal of the first light-emitting element 421.

On the other hand, when the motherboard controlling the hard disk device 460 is activated, the hard disk device 460 transmits a control signal having a high potential to the switch 442. At this time, the switch 442 can be powered according to the hard disk device 460. The bit control signal is turned on, so that the cathode end of the first light-emitting element 421 is grounded. Since the anode end of the first light-emitting element 442 is applied with the power source P1 and the cathode end of the first light-emitting element 442 is grounded, the first light-emitting element 442 is illuminated.

In contrast, if the motherboard controlling the hard disk device 460 is not activated, the first control signal CS1 and the second control signal CS2 can be maintained at a high potential (H) state. At this time, neither the first diode 411 nor the third diode 413 is turned on, causing the second diode 412 to be in an open state. At this time, the transistor gate terminal of the first switch 441 is in a floating state, so that the transistor is not turned on. It should be understood by those of ordinary skill in the art that the first light-emitting element 421 will not be illuminated regardless of whether the hard disk device 460 outputs a control signal of any state to the switch 442. Therefore, the present embodiment can ensure that the first light-emitting element 421 does not malfunction and allows the user to misjudge.

Referring back to FIG. 3, it can be seen from the above that the first light-emitting element 421 in FIG. 4 can be used in the indicator number 321 or 341 indicating the hard disk group 320 or 340. However, the indicator number 321 or 341 can only display the status of the respective overall hard disk group 320 or 340, but does not indicate the status of the individual hard disk device. Thus, in some alternative embodiments, at least one of the indicator lights 361 and 362 can also be configured on each hard disk device. According to the indicator numbers 361 and 362 configured on each hard disk device, the user can know the current state of the corresponding hard disk.

Referring to FIG. 4 again, in order to meet the above requirements, in the lamp module 400, the second light-emitting element 422 and the third light-emitting element 423 may be further included as the indicator lights 361 and 362 in FIG. Similarly, the second issue The light element 422 and the third light emitting element 423 can also be realized by a light emitting diode. In this embodiment, the cathode end of the second illuminating element 422 is coupled to the cathode end of the first diode 411 and receives the first control signal CS1. In addition, the anode end of the second illuminating element 422 is coupled to the cathode end of the third diode 413 and receives the second control signal CS2. In contrast, the anode end and the cathode end of the third light emitting element 423 are coupled to the cathode end and the anode end of the second light emitting element 422, respectively.

Since the second illuminating element 422 and the third illuminating element 423 are reversed from each other, the second illuminating element 422 and the third illuminating element 423 can display a corresponding hard state according to the state of the first control signal CS1 and the second control signal CS2. The status of the disc device. Hereinafter, how to use the second light-emitting element 422 and the third light-emitting element 423 to display the state of the corresponding hard disk device will be described in several embodiments.

Referring to FIG. 4 and FIG. 5 again, the following description is exemplified by the hard disk device 460, and those skilled in the art should be able to apply the same to the multi-disk system 300 of FIG. It is assumed that when the hard disk device 460 has not been powered off, the states of the first control signal CS1 and the second control signal CS2 can be maintained at a high potential (H), such that the second illuminating element 422 and the third illuminating Element 423 will not conduct.

In contrast, when the hard disk device 460 is powered on, the motherboard controlling the hard disk device 460 can make the first control signal CS1 low (L) and the second control signal CS2 high. (H). At this time, the second light-emitting element 422 is turned on, and the third light-emitting element 423 is not turned on.

In another case, it is assumed that when the operating system in the hard disk 460 is locked, the first control signal CS1 and the second control signal CS2 can be switched to the low potential (L), resulting in the second Both the light-emitting element 422 and the third light-emitting element 423 are not turned on and thus do not illuminate.

Although several embodiments are provided in FIG. 5 to illustrate the use of the second illuminating element 422 and the third illuminating element 423 to indicate the state of the corresponding hard disk device 460, the invention is not limited thereto. Those skilled in the art can operate the states of the first control signal CS1 and the second control signal CS2 according to actual needs. For example, when the hard disk device is being read or written, the user can continuously switch the polarity of the control signal, so that the corresponding light-emitting element uses a blinking manner to inform the user of the state.

In summary, the control circuit and the lamp module of the hard disk lamp of the present invention can drive the light-emitting components of the hard disk and the motherboard according to the control signal, so that there is no hard disk and the host that display the light number in a non-working state. Board, so users can clearly understand the status of the motherboard and hard drive. In addition, the display condition of the light can also display the real state of more hard disks or the motherboard by a combination of different light numbers, such as the number of lighted lights or the case of being lit, for example, in motion, locked There was an error in the middle. Therefore, the present invention can not only clearly grasp the operation of the hard disk, but also improve the flexibility of the hard disk design.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

111, 112‧‧‧Power supply

121, 122, 123, 124‧‧‧ motherboard

210, 331, 332, 333, 351, 352, 353‧‧‧ hard drives

220‧‧‧ switch

230‧‧‧Power supply

240‧‧‧resistance

250‧‧‧Lighting elements

320, 340‧‧‧ motherboard

321, 341, 361, 362‧‧‧ display lights

400‧‧‧Light Module

411‧‧‧First Diode

412‧‧‧second diode

413‧‧‧ Third Dipole

421‧‧‧First light-emitting element

422‧‧‧Second light-emitting element

423‧‧‧ Third light-emitting element

431‧‧‧First resistance

432‧‧‧second resistance

433‧‧‧ Third resistor

433‧‧‧fourth resistor

441‧‧‧ switch

442‧‧‧second transistor

450‧‧‧Control circuit

460‧‧‧hard disk device

P1‧‧‧ power supply

P2‧‧‧ power supply

CS1‧‧‧First control signal

CS2‧‧‧second control signal

HS‧‧‧High potential signal

FIG. 1 is a diagram showing a server system of a multi-master board.

2 is a circuit diagram of a hard disk and its lamp module inside the motherboard.

FIG. 3 is a schematic diagram of a multiple hard disk system.

4 is a circuit diagram of a lamp module in accordance with a preferred embodiment of the present invention.

Figure 5 shows the display of the hard disk status.

400‧‧‧Light Module

411‧‧‧First Diode

412‧‧‧second diode

413‧‧‧ Third Dipole

421‧‧‧First light-emitting element

422‧‧‧Second light-emitting element

423‧‧‧ Third light-emitting element

431‧‧‧First resistance

432‧‧‧second resistance

433‧‧‧ Third resistor

433‧‧‧fourth resistor

441‧‧‧ switch

442‧‧‧second transistor

450‧‧‧Control circuit

460‧‧‧hard disk device

Claims (10)

A control circuit for a hard disk light is suitable for a hard disk device, wherein the hard disk light is generated by a first light emitting element, and the control circuit comprises: a first diode, the cathode end receiving a a first control signal, wherein the first diode changes the potential of the anode terminal according to the first control signal; a first switch is coupled to the anode end of the first diode for using the first a state of the anode end of the polar body, and determining whether to conduct a power source to the first light emitting element to generate the hard disk light number, wherein the first switch is a transistor, and the source terminal is coupled to the power source, and the gate thereof The extreme and 汲 extremes are respectively coupled to the anode end of the first diode and the first illuminating element, wherein the first control signal is generated by a motherboard that controls the hard disk device. The control circuit of claim 1, wherein the first illuminating element is a first illuminating diode, and an anode end of the first illuminating diode is coupled to a 汲 terminal of the transistor. The control circuit of claim 1, further comprising: a second diode disposed on a path between the switch and the first diode, wherein a cathode end of the second diode An anode end coupled to the first diode; a first resistor for coupling the anode end of the second diode to the first switch; and a second resistor for the first switch Coupling to the first illuminating element Pieces. A light source module includes: a first light emitting element; a second light emitting element; and a control circuit coupled to the second light emitting element and controlling whether the second light emitting element emits light or not, and the control circuit has a a switch, when the switch is turned on, the control circuit couples the first light-emitting element to a power source by the switch, so that the power source is used to illuminate the first light-emitting element, wherein the switch is a first transistor, The source terminal is coupled to the power source, and the gate terminal thereof is coupled to the output terminal of the control circuit. The light-emitting module of claim 4, wherein the first light-emitting element is a first light-emitting diode, and an anode end thereof is coupled to the control circuit. The signal module of claim 5, wherein the control circuit comprises: a first diode, a cathode end coupled to a first control signal and the second light emitting element; and a second diode a cathode end coupled to the anode end of the first diode; a third diode having a cathode end coupled to a second control signal and the second light emitting element, the anode end of which is coupled to the second a cathode end of the diode; a first resistor for coupling the anode end of the second diode to the switch through an output end of the control circuit. The light-emitting module of claim 6, wherein the second light-emitting component is a second light-emitting diode, and the cathode end is coupled to the first control The signal is connected to the cathode end of the first diode, and the anode end of the second LED is coupled to the second control signal and the cathode end of the third diode. The light-emitting module of the sixth aspect of the invention, further comprising a third light-emitting component, is implemented by a third light-emitting diode, wherein an anode end of the third light-emitting diode is coupled to the first light-emitting diode a control signal and a cathode end of the first diode, and a cathode end of the third LED is coupled to the second control signal and a cathode end of the third diode. The light module of claim 4, further comprising a second resistor for coupling the first end of the first transistor to the first light emitting element. The lamp module of claim 4, further comprising: a second transistor, wherein the first light emitting element is coupled to the first light emitting element, and the source terminal is grounded; and a third resistor is used to The gate of the second transistor is coupled to the hard disk device to receive a working signal; and a fourth resistor, wherein one end is coupled to the third resistor and coupled to the hard disk device, and the other end is coupled The power supply.