US6487668B2 — Thermal and power management to computer systems

Claim 1

Independent Claim 109 words

A computing apparatus, comprising: a processing unit, said processing unit executes instructions in accordance with a clock signal having a clock frequency; a temperature sensor that monitors temperature of said processing unit; an activity detector that monitors activity of said processing unit; and a clock control unit operatively connected to said processing unit and said temperature sensor and said activity detector, said clock control unit operates to alter the clock frequency of the clock signal in a gradual and dynamic manner based on the temperature of said processing unit as monitored by said temperature sensor and on the activity of said processing unit as monitored by said activity detector.

Claim 2

Dependent Claim 109 words

A computing apparatus, comprising: a processing unit, said processing unit executes instructions in accordance with a clock signal having a clock frequency; a temperature sensor that monitors temperature of said processing unit; an activity detector that monitors activity of said processing unit; and a clock control unit operatively connected to said processing unit and said temperature sensor and said activity detector, said clock control unit operates to alter the clock frequency of the clock signal in a gradual and dynamic manner based on the temperature of said processing unit as monitored by said temperature sensor and on the activity of said processing unit as monitored by said activity detector.

Claim 3

Dependent Claim 30 words

A computing apparatus as recited in claim 1 , wherein said clock control unit operates to decrease the clock frequency when the temperature of said processing unit is too high.

Claim 4

Dependent Claim 16 words

A computing apparatus as recited in claim 1 , wherein said computing apparatus is a microprocessor.

Claim 5

Dependent Claim 17 words

A computing apparatus as recited in claim 1 , wherein said computing apparatus is a computer system.

Claim 6

Dependent Claim 51 words

A computing apparatus as recited in claim 1 , wherein said clock control unit operates to increase the clock frequency when demanded by the activity of said processing unit, and wherein said clock control unit operates to decrease the clock frequency when the temperature of said processing unit is too high.

Claim 7

Dependent Claim 100 words

A computer, comprising: a processor, said processor processes instructions in accordance with a clock signal; an activity detector operatively connected to said processor, said activity detector monitors activity of said processor, said activity detector determines whether said processor is in normal power mode or a reduced power mode; a fan; and a fan controller, said fan controller controls the speed of said fan in accordance with the activity of said processor such that the speed of said fan is less utilized when said processor is in the reduced power mode than when said processor is in the normal power mode.

Claim 8

Dependent Claim 100 words

A computer, comprising: a processor, said processor processes instructions in accordance with a clock signal; an activity detector operatively connected to said processor, said activity detector monitors activity of said processor, said activity detector determines whether said processor is in normal power mode or a reduced power mode; a fan; and a fan controller, said fan controller controls the speed of said fan in accordance with the activity of said processor such that the speed of said fan is less utilized when said processor is in the reduced power mode than when said processor is in the normal power mode.

Claim 9

Dependent Claim 23 words

A computer as recited in claim 6 , wherein said fan controller uses pulse width modulation to control the speed of said fan.

Claim 10

Dependent Claim 18 words

A computer as recited in 6 , wherein the reduced power mode includes at least a sleep state.

Claim 11

Dependent Claim 18 words

A computer as recited in 6 , wherein the reduced power mode includes at least a sleep state.

Claim 12

Dependent Claim 26 words

A computer as recited in claim 8 , wherein when said fan controller causes said fan to stop when said processor is in the sleep state.

Claim 13

Dependent Claim 41 words

A computer as recited in claim 6 , wherein said computer further comprises a temperature sensor that produces a temperature signal, and wherein said fan controller controls the speed of said fan based at least in part on the temperature signal.

Claim 14

Dependent Claim 23 words

A computer as recited in claim 10 , wherein said temperature sensor produces the temperature signal based on the temperature of said processor.

Claim 15

Dependent Claim 103 words

A computer, comprising: a processor that operates in accordance with a clock, the clock having a clock frequency; a temperature sensor that provides a temperature indication; and a fan; and a thermal manager operatively connected to said microprocessor and said fan, said thermal manager being configured to receive the temperature indication from said temperature sensor, and said thermal manager activates said fan when the temperature indication indicates that primary thermal management is required, and subsequently reduces the clock frequency of the clock for said processor when the temperature indication indicates that supplemental thermal management is required even after said fan has been activated.

Claim 16

Dependent Claim 103 words

A computer, comprising: a processor that operates in accordance with a clock, the clock having a clock frequency; a temperature sensor that provides a temperature indication; and a fan; and a thermal manager operatively connected to said microprocessor and said fan, said thermal manager being configured to receive the temperature indication from said temperature sensor, and said thermal manager activates said fan when the temperature indication indicates that primary thermal management is required, and subsequently reduces the clock frequency of the clock for said processor when the temperature indication indicates that supplemental thermal management is required even after said fan has been activated.

Claim 17

Dependent Claim 31 words

A computer as recited in claim 12 , wherein when said thermal manager reduces the clock frequency of the clock for said processor such reduction is performed in a gradual manner.

Claim 18

Dependent Claim 35 words

A computer as recited in claim 12 , wherein said fan is a variable-speed fan, and wherein when said thermal manager activates said fan, the speed of said fan is dependent on the temperature indication.

Claim 19

Dependent Claim 23 words

A computer as recited in claim 12 , wherein said thermal manager deactivates said fan when said processor enters a reduced power mode.

Claim 20

Dependent Claim 19 words

A computer as recited in claim 12 , wherein the temperature indication pertains to the temperature of said processor.

Claim 21

Dependent Claim 14 words

A computer as recited in claim 16 , wherein said processor is a microprocessor.

Claim 22

Dependent Claim 65 words

A computer as recited in claim 12 , wherein said fan is a variable-speed fan, wherein sad computer further comprises: an activity detector operatively connected to said processor, said activity detector determines an activity level of said processor, and wherein when said thermal manager activates said fan, the speed of said fan is controlled based on the temperature of said processor and the activity level.

Claim 23

Dependent Claim 54 words

A computer as recited in claim 18 , wherein said thermal manager is operatively connected to said activity detector, and wherein when said activity detector detects that the activity level is low, said thermal manager causes the clock frequency of the clock to be substantially reduced such that said fan need not be activated.

Claim 24

Dependent Claim 50 words

A computer as recited in claim 12 , wherein said thermal manager manages the temperature of said processor to advert its overheating in a performance manner by using said fan for primary thermal management to improve thermal conditions without sacrificing some performance of said processor by lowering the clock frequency.

Claim 25

Dependent Claim 45 words

A computer as recited in claim 20 , wherein the lowering of the clocking frequency of said processor is used for supplemental thermal management to improve the thermal conditions when use of said fan for primary thermal management is unable to stabilize the thermal conditions.

Claim 26

Dependent Claim 32 words

A computer as recited in claim 21 , wherein with primary thermal management a plurality of respectively greater speeds for said fan can be used to attempt to stabilize the thermal conditions.

Claim 27

Dependent Claim 33 words

A computer as recited in claim 21 , wherein with supplemental thermal management a plurality of respectively lower clock frequencies for the clock can be used to attempt to stabilize the thermal conditions.

Claim 28

Independent Claim 75 words

A method for providing thermal management for a computer, the computer including at least a processor and a cooling fan, said method comprising: monitoring temperature of the processor; activating a cooling fan when the temperature of the processor indicates that primary thermal management is requires; and subsequently reducing operational clock frequency of the processor when the temperature of the processor indicates that supplemental thermal management is required even after the cooling fan has been activated.

Claim 29

Independent Claim 75 words

A method for providing thermal management for a computer, the computer including at least a processor and a cooling fan, said method comprising: monitoring temperature of the processor; activating a cooling fan when the temperature of the processor indicates that primary thermal management is requires; and subsequently reducing operational clock frequency of the processor when the temperature of the processor indicates that supplemental thermal management is required even after the cooling fan has been activated.

Claim 30

Dependent Claim 20 words

A method as recited in claim 24 , wherein the speed of the cooling fan is controlled using pulse-width modulation.

Claim 31

Dependent Claim 35 words

A method as recited in claim 24 , wherein when the cooling fan is initially activated, the speed of the cooling fan is increased in a gradual manner as additional primary thermal management is needed.

Claim 32

Dependent Claim 35 words

A method as recited in claim 24 , wherein said activating of the cooling fan increases the speed of the cooling fan in a gradual manner to provide different levels of the primary thermal management.

Claim 33

Dependent Claim 31 words

A method as recited in claim 24 , wherein said reducing of the operational clock frequency reduces the operational clock frequency by an amount dependent on the temperature of the processor.

Claim 34

Dependent Claim 33 words

A method as recited in claim 24 , wherein said reducing the operational clock frequency of the processor is performed in a gradual manner to provide different levels of the supplemental thermal management.

Claim 35

Dependent Claim 20 words

A method as recited in claim 24 , wherein the operational clock frequency of the processor is altered with hysteresis.

Claim 36

Dependent Claim 42 words

A method as recited in claim 24 , wherein the cooling fan is a variable-speed fan, and wherein said activating of the cooling fan causes the cooling fan to operate at a speed that is dependent on the temperature of the processor.

Claim 37

Dependent Claim 45 words

A method as recited in claim 31 , wherein when the cooling fan is initially activated, the speed of the cooling fan is relatively slow and the speed of the cooling fan thereafter increases in a gradual manner when the temperature of the processor increases.

Claim 38

Dependent Claim 42 words

A method as recited in claim 24 , wherein the cooling fan is a variable-speed fan, and wherein the primary thermal management operates the cooling fan at successively greater speeds to provide a plurality of different levels of the primary thermal management.

Claim 39

Dependent Claim 26 words

A method as recited in claim 33 , wherein the level of the primary thermal management being performed is dependent on the temperature of the processor.

Claim 40

Dependent Claim 34 words

A method as recited in claim 24 , wherein the supplemental thermal management reduces the operational clock frequency by successively greater amounts to provide a plurality of different levels of the supplemental thermal management.

Claim 41

Dependent Claim 26 words

A method as recited in claim 35 , wherein the level of the supplemental thermal management being performed is dependent on the temperature of the processor.

Claim 42

Independent Claim 86 words

A method for providing thermal management for a computer, the computer including at least a processor and a cooling fan, said method comprising: monitoring temperature of the processor; monitoring activity of the processor; activating a cooling fan when the temperature and the activity of the processor indicate that primary thermal management is required; and subsequently reducing operational clock frequency of the processor when the temperature and the activity of the processor indicate that supplemental thermal management is required even after the cooling fan has been activated.

Claim 43

Independent Claim 86 words

A method for providing thermal management for a computer, the computer including at least a processor and a cooling fan, said method comprising: monitoring temperature of the processor; monitoring activity of the processor; activating a cooling fan when the temperature and the activity of the processor indicate that primary thermal management is required; and subsequently reducing operational clock frequency of the processor when the temperature and the activity of the processor indicate that supplemental thermal management is required even after the cooling fan has been activated.

Claim 44

Dependent Claim 35 words

A method as recited in claim 37 , wherein when the cooling fan is initially activated, the speed of the cooling fan is increased in a gradual manner as additional primary thermal management is needed.

Claim 45

Dependent Claim 35 words

A method as recited in claim 37 , wherein said activating of the cooling fan increases the speed of the cooling fan in a gradual manner to provide different levels of the primary thermal management.

Claim 46

Dependent Claim 34 words

A method as recited in claim 37 , wherein said reducing of the operational clock frequency reduces the operational clock frequency by an amount dependent on the temperature and the activity of the processor.

Claim 47

Dependent Claim 33 words

A method as recited in claim 37 , wherein said reducing the operational clock frequency of the processor is performed in a gradual manner to provide different levels of the supplemental thermal management.

Claim 48

Dependent Claim 20 words

A method as recited in claim 37 , wherein the operational clock frequency of the processor is altered with hysteresis.

Claim 49

Dependent Claim 45 words

A method as recited in claim 37 , wherein the cooling fan is a variable-speed fan, and wherein said activating of the cooling fan causes the cooling fan to operate at a speed that is dependent on the temperature and the activity of the processor.

Claim 50

Dependent Claim 45 words

A method as recited in claim 43 , wherein when the cooling fan is initially activated, the speed of the cooling fan is relatively slow and the speed of the cooling fan thereafter increases in a gradual manner when the temperature of the processor increases.

Claim 51

Dependent Claim 42 words

A method as recited in claim 37 , wherein the cooling fan is a variable-speed fan, and wherein the primary thermal management operates the cooling fan at successively greater speeds to provide a plurality of different levels of the primary thermal management.

Claim 52

Dependent Claim 29 words

A method as recited in claim 45 , wherein the level of the primary thermal management being performed if dependent on the temperature and the activity of the processor.

Claim 53

Dependent Claim 34 words

A method as recited in claim 37 , wherein the supplemental thermal management reduces the operational clock frequency by successively greater amounts to provide a plurality of different levels of the supplemental thermal management.

Claim 54

Dependent Claim 29 words

A method as recited in claim 47 , wherein the level of the supplemental thermal management being performed is dependent on the temperature and the activity of the processor.

Claim 55

Independent Claim 116 words

A method for providing thermal management for a computer, the computer including at least a processor and a cooling fan, said method comprising: monitoring temperature of the processor; comparing the temperature of the processor with at least a first temperature threshold and a second predetermined temperature, the second predetermined temperature corresponding to a greater temperature than the first predetermined temperature; activating a cooling fan when the temperature of the processor exceeds the first predetermined temperature; and reducing operational clock frequency of the processor when the temperature of the processor exceeds the second predetermined temperature, wherein the cooling fan provides primary thermal management and reduction in the operational clock frequency of the processor provides secondary thermal management.

Claim 56

Independent Claim 116 words

A method for providing thermal management for a computer, the computer including at least a processor and a cooling fan, said method comprising: monitoring temperature of the processor; comparing the temperature of the processor with at least a first temperature threshold and a second predetermined temperature, the second predetermined temperature corresponding to a greater temperature than the first predetermined temperature; activating a cooling fan when the temperature of the processor exceeds the first predetermined temperature; and reducing operational clock frequency of the processor when the temperature of the processor exceeds the second predetermined temperature, wherein the cooling fan provides primary thermal management and reduction in the operational clock frequency of the processor provides secondary thermal management.

Claim 57

Dependent Claim 76 words

A method as recited in claim 49 , wherein said method further comprises: increasing the operational clock frequency of the processor when the temperature of the processor drops substantially below the second predetermined temperature, provided that the operational clock frequency was previously reduced by said reducing, or deactivating the cooling fan when the temperature of the processor is substantially less than the first predetermined temperature, provided that the cooling fan was previously activated by said activating.

Claim 58

Dependent Claim 46 words

A method as recited in claim 49 , wherein said method further comprises: increasing the operational clock frequency of the processor when the temperature of the processor drops substantially below the second predetermined temperature, provided that the operational clock frequency was previously reduced by said reducing.

Claim 59

Dependent Claim 42 words

A method as recited in claim 51 , wherein said method further comprises: deactivating the cooling fan when the temperature of the processor is substantially less than the first predetermined temperature, provided that the cooling fan was previously activated by said activating.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2005-11-25	2006-05-27	2006-11-26	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2009-11-25	2010-05-27	2010-11-26	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2013-11-25	2014-05-27	2014-11-26	$7700.00	Window Closed / Lapsed

Thermal and power management to computer systems

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