WO2019080204A1 - 发光二极管光源的亮度控制装置与方法 - Google Patents

发光二极管光源的亮度控制装置与方法

Info

Publication number
WO2019080204A1
WO2019080204A1 PCT/CN2017/111199 CN2017111199W WO2019080204A1 WO 2019080204 A1 WO2019080204 A1 WO 2019080204A1 CN 2017111199 W CN2017111199 W CN 2017111199W WO 2019080204 A1 WO2019080204 A1 WO 2019080204A1
Authority
WO
WIPO (PCT)
Prior art keywords
brightness
light source
value
led light
current
Prior art date
Application number
PCT/CN2017/111199
Other languages
English (en)
French (fr)
Inventor
何怀亮
Original Assignee
惠科股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 惠科股份有限公司 filed Critical 惠科股份有限公司
Publication of WO2019080204A1 publication Critical patent/WO2019080204A1/zh

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback

Definitions

  • the present application relates to an LED light source, and more particularly to a brightness control device and method for an LED source.
  • the brightness control device of the prior art LED light source includes a light emitting diode current controller, an RC filter circuit, a current regulator, a resistor, a capacitor, and a diode.
  • the LED current controller generates a driving signal according to the voltage of the return voltage
  • the RC filter circuit is configured to filter the driving signal, and send the filtered driving signal to the current regulator, and the current regulator according to the filtering
  • the drive signal adjusts the operating drive current of the LED source.
  • the electrical characteristics of the light-emitting diode light source may be different due to the use of the turn-to-turn or temperature
  • the operating drive current through the light-emitting diode light source may change due to the use of the turn-off or temperature, resulting in a change in the brightness of the light-emitting diode light source, and now A technical brightness control device does not solve this problem.
  • the LED source has a corresponding brightness.
  • the brightness of the LED light source actually gives the human eye a variability due to other factors, such as ambient light, which may affect the human eye's perception of the same brightness.
  • the LED source may have different brightness due to temperature and use.
  • the brightness of the illumination device using the LED light source and the illumination source of the display device may cause differences in the brightness of the final transmission to the human eye due to the influence of other components in the middle. In other words, there is still room for improvement in prior art brightness control devices and methods.
  • the present application Based on at least one technical problem to solve the prior art and/or at least one technical effect of the present application, the present application provides a brightness control device and method for an LED light source, which is not used by the LED light source. The influence of the daytime, which leads to a large deviation between the brightness and brightness settings of the device.
  • an embodiment of the present application provides a brightness control device for an LED light source, including: a counting unit for counting the usage time of the LED light source to obtain a diurnal count value; a setting unit, configured to provide a brightness setting value; an adjustable current source electrically connected to the LED light source for providing an operating driving current to the LED light source; and a current controller electrically connected to the meter
  • the unit, the brightness setting unit and the adjustable current source are configured to calculate a corresponding brightness setting according to the used daytime count value and the brightness setting value based on a prediction model obtained by depth learning
  • the set operation drives the current and generates a control signal to control the adjustable current source to provide the calculated operational drive current to the LED source.
  • the brightness control device further includes: an ambient light brightness detector electrically connected to the current controller for detecting ambient light to obtain an ambient light brightness value; wherein the current control The device further receives the ambient light brightness value, wherein the operational drive current is more related to the ambient light brightness value.
  • the brightness control device further includes: a temperature detecting unit electrically connected to the current controller for detecting a temperature of the LED light source to obtain a temperature detection value;
  • the current controller further receives the temperature detection value, wherein the operation driving current is more related to the temperature detection value
  • the light emitting diode light source comprises at least one light emitting diode.
  • the adjustable current source includes: a resistor; and a gate transistor, wherein a gate is configured to receive the control signal, and a drain thereof is configured to provide the operating drive current to the light emitting diode
  • the light source, and its source are electrically conductive.
  • the current controller adopts a neural network-like calculus or a support vector machine algorithm.
  • the switching transistor is controlled to be turned on or off by the control signal to adjust the operating driving current.
  • the ambient light brightness detector is a light receiving diode.
  • an embodiment of the present application provides a brightness control device for an LED light source, including: a counting unit for counting the usage time of the LED light source to obtain a diurnal count value; a setting unit, configured to provide a brightness setting value; an adjustable current source electrically connected to the LED light source for providing an operating driving current to the LED light source; a current controller, the electric Connecting the counting unit, the brightness setting unit and the adjustable current source to calculate, according to the prediction model obtained by deep learning, according to the used daytime count value and the brightness setting value Corresponding to the operating value of the brightness setting value, and generating a control signal to control the adjustable current source to provide the calculated operating driving current to the LED light source; ambient light brightness detector, electrical connection a current controller for detecting ambient light to obtain an ambient light brightness value; a temperature detecting unit electrically connected to the current controller for detecting a temperature of the LED light source for temperature detection And wherein the current controller further receives the ambient light luminance value, wherein the operational drive current
  • the embodiment of the present application provides a brightness control method for an LED light source, including: receiving a brightness setting value and a daytime counting value, wherein the daytime counting value is counting the usage time of the LED light source.
  • the brightness setting value and the temperature detection value are received.
  • the temperature detection value is obtained by detecting a temperature of the LED light source.
  • obtaining a prediction model based on a depth learning algorithm and determining, according to the brightness setting value and the temperature detection value, the brightness setting value corresponding to the light emitting diode light source according to the prediction model
  • the operation drives a current.
  • the embodiments of the present application have at least the following beneficial effects:
  • the brightness control device and method of the LED light source provided by the embodiments of the present application do not cause the brightness of the device due to the influence of the use of the LED light source.
  • the brightness setting has a large deviation.
  • This application considers the ring more The effect of ambient brightness and the temperature of the LED source to adjust the operating drive current of the LED source to enable the display device or illumination device to achieve power saving and/or better display (illumination) effects. Description
  • FIG. 1 is a block diagram of a brightness control device of an LED light source according to an embodiment of the present application.
  • FIG. 2 is a flow chart of a method for controlling brightness of an LED light source according to an embodiment of the present application.
  • FIG. 3 is a block diagram of a brightness control device of an LED light source according to another embodiment of the present application.
  • FIG. 4 is a flow chart of a method for controlling brightness of an LED light source according to another embodiment of the present application.
  • FIG. 5 is a block diagram of a brightness control device of an LED light source according to another embodiment of the present application.
  • FIG. 6 is a flow chart of a method for controlling brightness of an LED light source according to another embodiment of the present application.
  • FIG. 7 is a block diagram of a display device according to an embodiment of the present application.
  • the illustrated embodiments are to be understood as providing the details of the various details of the various embodiments. Therefore, various illustrated features, components, modules, layers, films, panels, regions, and/or aspects may be additionally combined, separated, and without departing from the disclosed embodiments. Swap and/or rearrange. In addition, the dimensions and relative sizes of layers, films, panels, regions and the like may be exaggerated in the drawings. When the embodiments can be implemented differently, the particular processing order can be performed in a different order than described. For example, two consecutively described processes may be performed substantially the same or in the reverse order of the described order. In addition, the same component symbols denote the same components.
  • Embodiments of the present application provide a brightness control device and method for an LED light source, which directly detects brightness of a device using an LED light source, and sets a device brightness detection value and a user-set setting. After the brightness values are compared, a driving operation for changing the light source of the light emitting diode is generated according to the comparison result.
  • the current control signal is such that the brightness of the device is similar to the set brightness value, and the brightness and the set brightness value of the device are not large due to the temperature of the LED light source, the use of the daytime or the components of the device. deviation.
  • the brightness control device and method further consider the influence of the ambient light brightness, and adjust the operating drive current of the light emitting diode light source according to the ambient light brightness.
  • the present application directly measures the existing brightness of an LED light source (or its device). If the user wants to set a certain brightness, according to whether the existing brightness of the LED source is different from the set brightness. Whether it is out of range, directly adjust the operating drive current. Further, the application also finely adjusts the operating drive current according to the ambient light brightness, so that the final actual brightness is close to the set brightness, and the display device or the illumination device can achieve power saving and/or optional display (lighting) effect. the goal of.
  • FIG. 1 is a block diagram of a brightness control device for an LED light source according to an embodiment of the present application.
  • the brightness control device 2 of the LED light source LS (including at least one light emitting diode, in this embodiment, a plurality of LEDs connected in series) includes a brightness setting unit 21, a light emitting diode current controller 22, an adjustable current source 23 and The device brightness detector 24 is electrically connected to the brightness setting unit 21, the adjustable current source 23 and the device brightness detector 24, and the adjustable current source 23 is electrically connected to the LED source LS.
  • the device brightness detector 24 may be, for example, a light receiving diode for acquiring a device brightness detection value corresponding to the brightness of the LED light source LS, and the device brightness detection value is a device using the LED light source LS.
  • the brightness of the device is determined by the brightness of the LED light source LS if there is no other component.
  • the brightness setting unit 21 is for operating by the user or automatically operated by the operating system to generate a brightness setting value, and will provide the brightness setting value to the light-emitting diode current controller 22.
  • the adjustable current source 23 is operative to provide an operational drive current to the LED source LS and is controlled by a control signal generated by the LED current controller 22 to adjust the operational drive current.
  • the adjustable current source 23 can be implemented by the transistor M1 and the resistor R1, but the application is not limited thereto.
  • the gate of the transistor M1 receives the control signal, and the source of the transistor M1 is electrically connected to the low voltage VSS through the resistor R1, and the two ends of the LED light source are electrically connected to the high voltage VDD and the drain of the bypass transistor M1, respectively. .
  • the operational driving current of the LED light source LS can be equivalently changed.
  • the LED current controller 22 compares the device brightness detection value with the brightness setting value to generate a control signal
  • the adjustable current source 23 is controlled to change the operating drive current of the LED source LS. Further, the LED current controller 22 determines whether the difference between the device brightness detection value and the brightness setting value is out of range to further generate a control signal. When the difference between the device brightness detection value and the brightness setting value is not exceeded, the operation driving current is no longer increased or decreased; instead, the operating driving current is increased or decreased to increase or decrease the device detecting brightness value, thereby The device detects that the brightness value approaches the set brightness value.
  • the influence of the ambient light brightness can be considered. Since the brightness of the ambient light is brighter, the human eye is less sensitive to changes in the brightness of the device. Therefore, the brightness detection value of the device can be adjusted to be lower than the set brightness value, but the device brightness detection value and the set brightness value are set. The difference between them is still out of scope. In addition, when the ambient light is dark, the human eye is sensitive to changes in the brightness of the device. Therefore, the device brightness detection value can be adjusted to be higher than the set brightness value, but the device brightness detection value and the set brightness value. The difference between them is still out of scope. Thus, the brightness control device 2 can achieve the purpose of power saving and/or optional display (illumination) effects.
  • the brightness control device 2 further includes an ambient light brightness detector 25, and the ambient light brightness detector 25 is electrically connected to the light emitting diode current controller 22, wherein the ambient light brightness detector 25 can be, for example, It is a light receiving diode.
  • the LED current controller 22 can finely adjust the operation driving current according to the ambient light sample value obtained by the ambient light brightness detector 25, so that the device brightness detection value is adjusted to be higher or lower than the set brightness value, but the device brightness is The difference between the detected value and the set brightness value is still out of range.
  • FIG. 2 is a flow chart of a method for controlling brightness of an LED light source according to an embodiment of the present application.
  • step S31 the set brightness value device brightness detection value is received.
  • step S32 a control signal is generated according to the set brightness value and the device brightness detection value.
  • step S33 the operation drive current is changed in accordance with the control signal.
  • the brightness control method further includes acquiring an ambient light brightness value, and fine-tuning the operation drive current according to the ambient light brightness value.
  • the brightness control device and method of the LED light source of the foregoing embodiments may be such that the brightness of the device is similar to the set brightness value without being affected by the temperature of the LED light source, the use of the turn, or the components of the device. This causes the brightness of the device to deviate significantly from the set brightness value.
  • the brightness control device and method more consider the influence of ambient light brightness, and adjust the operating drive current of the light emitting diode light source according to the ambient light brightness, so that the display device or the lighting device can achieve power saving and/or optional display ( Photo Ming) The purpose of the effect.
  • Another embodiment of the present application provides a brightness control device and method for an LED light source, which uses a deep learning algorithm to train a prediction model, and thus based on the prediction model based on the brightness setting value and the temperature detection value, The operational drive current required for the LED source is accurately calculated, and a control signal is generated accordingly to control the operation of the drive current.
  • the brightness of the LED source can approach the brightness setting without causing the brightness of the photodiode source to deviate from the brightness setting due to temperature changes.
  • this application does not cause a large deviation between the brightness and brightness setting of the device due to the influence of the temperature of the LED source.
  • the present application further considers the influence of the ambient light brightness, and adjusts the operating driving current of the LED light source according to the ambient light brightness, so that the final actual brightness is close to the set brightness, and the display device or the lighting device Can achieve the purpose of power saving and / or better optional display (lighting) effect.
  • the foregoing deep learning algorithm may be implemented by a neural network-like algorithm or a support vector machine algorithm.
  • the prediction model is trained according to the training set, and then the brightness control device can calculate the operation required for the LED light source based on the temperature detection value and the brightness setting value based on the prediction model.
  • Drive current is a plurality of known temperature detection values, a plurality of known brightness setting values, and a plurality of known operations corresponding to the brightness of the LED light source being equal to a plurality of known brightness setting values.
  • Drive current In the case of a neural network algorithm, the training set can be used to find the weights of the nodes of the neural network to train the prediction model.
  • FIG. 3 is a block diagram of a brightness control apparatus for an LED light source according to another embodiment of the present application.
  • the brightness control device 4 of the LED light source LS includes a brightness setting unit 41, a temperature detecting unit 42, a current controller 43, and an adjustable Current source 44.
  • the current controller 43 is electrically connected to the brightness setting unit 41, the temperature detecting unit 42 and the adjustable current source 44, and the adjustable current source 34 is electrically connected to the LED source LS.
  • the temperature detecting unit 42 is configured to detect the temperature of the LED light source LS and generate a temperature detection value to the current controller 43.
  • the brightness setting unit 41 is used to operate the user or to be automatically operated by the operating system to generate a brightness setting value, and to provide a brightness setting value to the current controller 43.
  • the present application uses A deep learning algorithm is used to find the temperature, brightness setpoint and predictive model of the operating drive current for the nonlinear relationship. Based on the prediction model, the current controller 43 calculates an operation drive current that causes the luminance of the light emitted from the LED light source LS to be equal to the brightness setting value according to the brightness setting value and the temperature detection value.
  • the current controller 43 generates a control signal according to the calculated operation drive current, so that the adjustable current source 44 supplies the calculated operational drive current to the LED light source LS.
  • the adjustable current source 34 can be implemented by the transistor M1 and the resistor R1, but the application is not limited thereto.
  • the gate of the transistor M1 receives the control signal, and the source of the transistor M1 is electrically connected to the low voltage VSS through the resistor R1, and the two ends of the LED light source are electrically connected to the high voltage VDD and the drain of the bypass transistor M1, respectively. .
  • the operational driving current of the LED light source LS can be changed equivalently.
  • the influence of ambient light brightness can be considered. Since the brightness of the ambient light is brighter, the human eye is less sensitive to changes in the brightness of the device. Therefore, the brightness of the LED light source LS can be adjusted slightly lower than the brightness setting value. In addition, when the ambient light is dark, the human eye is sensitive to changes in the brightness of the device. Therefore, the brightness of the LED light source LS can be adjusted slightly higher than the brightness setting value. Thus, the brightness control device 3 can achieve the purpose of power saving and/or better display (lighting) effect.
  • the brightness control device 4 further includes an ambient light brightness detector 45, and the ambient light brightness detector 35 is electrically connected to the current controller 43, wherein the ambient light brightness detector 45 can be, for example, light. Receive diode.
  • the current controller 43 can further fine-tune the operation driving current according to the ambient light brightness value obtained by the ambient lightness detector 45, so that the brightness of the light emitted by the LED light source is slightly higher than the brightness setting value.
  • the current controller 43 calculates an operation driving current required for the X-ray light source LS according to the brightness setting value, the temperature detection value, and the ambient light brightness value based on the prediction model. Therefore, the training set includes a plurality of known temperature detection values, a plurality of known ambient light brightness values, a plurality of known brightness setting values, and a brightness of the LED light source that is slightly higher or slightly lower than A plurality of known operational drive currents corresponding to the known brightness settings of the pen. Alternatively, the current controller 43 is based on the prediction model, and after calculating the operation drive current based on the brightness setting value and the temperature detection value, fine-tunes the operation drive current according to the ambient light brightness value. [0052] Next, please refer to FIG. 4.
  • FIG. 4 is a flowchart of a method for controlling brightness of an LED light source according to another embodiment of the present application.
  • step S51 the brightness setting value and the temperature detection value are received, wherein the temperature detection value is obtained by detecting the temperature of the LED light source.
  • step S52 a prediction model based on the depth learning algorithm is obtained, and based on the prediction model, an operation driving current corresponding to the brightness setting value of the light emitting diode light source is determined according to the brightness setting value and the temperature detection value.
  • a control signal is generated to change the operational drive current, thereby causing the LED light source to receive the aforementioned determined operational drive current.
  • the brightness control method further includes acquiring an ambient light brightness value, and adjusting the operating drive current according to the ambient light brightness value.
  • the brightness control device and method of the LED light source of the foregoing embodiment can make the brightness and brightness setting values of the device similar, without causing the brightness and brightness setting of the device due to the influence of the temperature of the LED light source. There is a large deviation in the value.
  • the brightness control device and method more consider the influence of ambient light brightness, and adjust the operating drive current of the light emitting diode light source according to the ambient light brightness, so that the display device or the lighting device can achieve power saving and/or better display ( Lighting) The purpose of the effect.
  • Another embodiment of the present application provides a brightness control apparatus and method for an LED light source, which uses a depth learning algorithm to train a prediction model, such that the prediction model is based on the brightness setting value and the use of the LED light source.
  • the inter-count value can accurately calculate the operation drive current required for the LED light source, and accordingly generate a control signal to control the operation drive current.
  • the brightness of the light-emitting diode light source can approach the brightness setting value, and the brightness of the photodiode light source does not deviate from the brightness setting value due to the influence of the use of the light-emitting diode light source.
  • this application does not cause a large deviation between the brightness and brightness setting of the device due to the influence of the use of the LED light source.
  • the present application further considers the influence of the ambient light brightness and the temperature of the LED light source, and adjusts the operating driving current of the LED light source according to the ambient light brightness and the temperature detection value of the LED light source, so that the last The actual brightness is close to the set brightness and enables the display device or illumination device to achieve power saving and/or better display (lighting) effects.
  • the foregoing deep learning algorithm may be implemented by a neural network-like algorithm or a support vector machine algorithm.
  • the prediction model is trained according to the training set, and then the brightness control device can calculate the starting point based on the temperature detection value and the brightness setting value based on the prediction model.
  • the operating drive current required for the photodiode source is a plurality of known use of the inter-turn count value, a plurality of known brightness set values and a brightness of the LED light source equal to a plurality of known ones corresponding to the brightness set values. It is known to operate the drive current.
  • the training set can be used to find the weights of the nodes of the neural network to train the prediction model.
  • FIG. 5 is a block diagram of a brightness control apparatus for an LED light source according to another embodiment of the present application.
  • the brightness control device 6 of the light-emitting diode light source LS includes a brightness setting unit 61, a metering unit 62, a current controller 63, and an adjustable current Source 64.
  • the current controller 63 is electrically connected to the brightness setting unit 61, the metering unit 62 and the adjustable current source 64, and the adjustable current source 64 is electrically connected to the LED source LS.
  • the counting unit 62 is configured to count the use time of the LED light source LS, and generate a current controller 63 using the diurnal count value.
  • the brightness setting unit 61 is used to operate or hand over to the operating system to generate a brightness setting value, and to provide a brightness setting value to the current controller 63.
  • the use of the counting LED light source LS may change the electrical characteristics of the LED light source LS, causing the same operation driving current to be different between the turns, the brightness of the light emitted by the LED light source LS is different, therefore, Apply to use a deep learning algorithm to find a predictive model of the use of the inter-turn, brightness setpoint, and operational drive current for nonlinear relationships.
  • the current controller 63 calculates an operation drive current for causing the luminance of the light emitted from the light-emitting diode light source LS to be equal to the brightness setting value based on the brightness setting value and the use of the day-to-day count value.
  • the current controller 63 generates a control signal according to the calculated operation drive current, so that the adjustable current source 64 provides the calculated operational drive current to the LED light source LS.
  • the adjustable current source 64 can be implemented by the transistor M1 and the resistor R1, but the application is not limited thereto.
  • the gate of the transistor M1 receives the control signal, and the source of the transistor M1 is electrically connected to the low voltage VSS through the resistor R1, and the two ends of the LED light source are electrically connected to the high voltage VDD and the drain of the bypass transistor M1, respectively. .
  • the operational driving current of the LED light source LS can be changed equivalently.
  • the influence of ambient light brightness can be considered. Since the brightness of the ambient light is brighter, the human eye is less sensitive to changes in the brightness of the device. Therefore, the brightness of the LED light source LS can be adjusted slightly lower than the brightness setting value. In addition, in the ambient light brightness is darker, the human eye is on the device brightness The change is sensitive, so the brightness of the LED source LS can be adjusted slightly higher than the brightness setting. Thus, the brightness control device 6 can achieve the purpose of saving power and/or better display (lighting) effect.
  • the brightness control device 6 further includes an ambient light brightness detector 65, and the ambient light brightness detector 65 is electrically connected to the current controller 63, wherein the ambient light brightness detector 65 can be, for example, light. Receive diode.
  • the current controller 63 can further fine-tune the operation driving current according to the ambient light brightness value obtained by the ambient lightness detector 65, so that the brightness of the light emitted by the LED light source is slightly higher than the brightness setting value.
  • the current controller 63 calculates an operation drive current required for the xenon LED light source LS based on the brightness setting value, the diurnal count value, and the ambient light level value based on the prediction model. Therefore, the training set includes a plurality of known use of the diurnal count value, a plurality of known ambient light luminance values, a plurality of known luminance setting values, and a brightness of the LED light source that is slightly higher or slightly lower. A plurality of known operational drive currents corresponding to a plurality of known brightness settings. Alternatively, the current controller 63 is based on the prediction model, and after the operation drive current is calculated based on the brightness setting value and the inter-turn count value, the operation drive current is fine-tuned according to the ambient light brightness value.
  • the brightness control device 6 further includes a temperature detecting unit 66 electrically connected to the current controller 63. Since the temperature also affects the electrical characteristics of the LED light source LS, the present application detects the temperature of the LED light source LS by the temperature detecting unit 66, and considers the temperature detection value to calculate the operating drive current. Further, the current controller 63 may be based on the prediction model to calculate the operational drive current required for the x-ray source LS based on the brightness set value, the inter-turn count value, and the temperature detection value.
  • the training set includes a plurality of known use of the diurnal count value, a plurality of known temperature detection values, a plurality of known brightness setting values, and the brightness of the LED light source is equal to a plurality of known A plurality of known operational drive currents corresponding to the brightness set values.
  • FIG. 6 is a flowchart of a method for controlling brightness of an LED light source according to another embodiment of the present application.
  • step S71 the brightness setting value and the use of the daytime counting value are obtained, wherein the use of the daytime counting value is obtained by counting the use of the light source of the light emitting diode.
  • step S72 a prediction model based on the depth learning algorithm is obtained, and based on the prediction model, an operation drive current for determining a brightness setting value corresponding to the light-emitting diode light source based on the brightness setting value and the day-to-day count value is used.
  • step S73 production The control signal is generated to change the operational drive current such that the LED source receives the aforementioned determined operational drive current.
  • the brightness control method further includes acquiring an ambient light brightness value and a temperature detection value of the LED light source, and adjusting the operation driving current according to the ambient light brightness value and the temperature detection value.
  • the brightness control device and method of the LED light source of the foregoing embodiments can make the brightness and brightness setting values of the device similar, without causing the brightness and brightness of the device due to the influence of the use of the LED light source. There is a large deviation in the set value.
  • the brightness control device and method further consider the influence of the ambient light brightness and the temperature of the light emitting diode light source, and adjust the operating driving current of the light emitting diode light source according to the ambient light brightness and the detected temperature value, so as to make the display device or the lighting device Can achieve the purpose of power saving and / or better display (lighting) effect.
  • FIG. 7 is a block diagram of a display device according to an embodiment of the present application.
  • the display device 8 includes a backlight 81, a power supply 82, a liquid crystal panel 83, a drive circuit 84, and a brightness control device 85.
  • the power supply 82 is electrically connected to the backlight 81, the liquid crystal panel 83, the driving circuit 84 and the brightness control device 85
  • the brightness control device 85 is electrically connected to the backlight 81
  • the liquid crystal panel 83 is electrically connected to the driving circuit 84.
  • the power supply 82 is for supplying power to the backlight 81, the liquid crystal panel 83, the driving circuit 84, and the brightness control device 85.
  • the driving circuit 84 includes a gate driving circuit and a data driving circuit for selecting pixels in the liquid crystal panel 83 and transmitting the data signals to the selected pixels.
  • the backlight 81 may be the aforementioned light emitting diode light source
  • the brightness control device 85 may be the aforementioned brightness control device.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

发光二极管光源（LS）的亮度控制装置（6）与方法，所述亮度控制装置（6）包括计时单元（62）、亮度设定单元（61）、可调整电流源（64）与电流控制器（63）。计时单元（62）用以获取发光二极管光源（LS）的使用时间计数值。亮度设定单元（61）提供亮度设定值。电流控制器（63）基于通过深度学习获得的预测模型，根据使用时间计数值与亮度设定值计算出对应亮度设定值的操作驱动电流，并产生控制信号控制可调整电流源（64）提供计算出的操作驱动电流给发光二极管光源（LS）。所述亮度控制装置（6）与方法不会因为发光二极管光源（LS）的使用时间的影响，而导致设备的亮度与亮度设定值有较大的偏差。

Description

发明名称：发光二极管光源的亮度控制装置与方法 技术领域
[0001] 本申请是有关于一种发光二极管光源， 且特别是一种发光二极管光源的亮度控 制装置与方法。
背景技术
[0002] 现有技术的发光二极管光源的亮度控制装置包括发光二极体电流控制器、 RC 滤波电路、 电流调整器、 电阻、 电容、 与二极管。
[0003] 发光二极体电流控制器根据回朔的电压产生驱动信号， RC滤波电路用以对驱 动信号进行滤波， 并将滤波后的驱动信号送给电流调整器， 电流调整器再根据 滤波后的驱动信号调整发光二极管光源的操作驱动电流。
[0004] 由于发光二极管光源的电气特性可能会因为使用吋间或温度而有差异， 故经过 发光二极管光源的操作驱动电流可能因为使用吋间或温度而改变， 导致发光二 极管光源发出的亮度改变， 且现有技术的亮度控制装置并无法解决此问题。
[0005] 虽然现有技术中有使用比较的方法将操作驱动电流锁在预定的驱动电流， 以使 发光二极管光源具有相应的亮度。 然而， 发光二极管光源实际上给人眼的亮度 可能因为其他因素而有变异， 例如环境光可能影响人眼对同一亮度的感受。 另 夕卜， 即使有同样的操作驱动电流， 发光二极管光源可能因为温度与使用吋间而 有不同亮度。 再者， 使用发光二极管光源的照明设备与显示设备的发光源的亮 度可能因为中间其他组件的影响， 导致最后传送到人眼的亮度会有差异。 换言 之， 现有技术的亮度控制装置与方法仍有改善的空间。
技术问题
[0006] 基于要解决先前技术的至少一个技术问题与 /或要达成本申请的至少一个技术 效果， 本申请提供一种发光二极管光源的亮度控制装置与方法， 其不会因为发 光二极管光源的使用吋间的影响， 而导致设备的亮度与亮度设定值有较大的偏 技术解决方案
[0007] 基于前述目的， 本申请实施例提供一种发光二极管光源的亮度控制装置， 包括 ： 计吋单元， 用以计数所述发光二极管光源的使用吋间， 以获取使用吋间计数 值； 亮度设定单元， 用以提供亮度设定值； 可调整电流源， 电性连接所述发光 二极管光源， 用以提供操作驱动电流给所述发光二极管光源； 以及电流控制器 ， 电性连接所述计吋单元、 所述亮度设定单元与所述可调整电流源， 用以基于 通过深度学习获得的预测模型， 根据所述使用吋间计数值与所述亮度设定值计 算出对应所述亮度设定值的操作驱动电流， 并产生控制信号控制所述可调整电 流源提供计算出的所述操作驱动电流给所述发光二极管光源。
[0008] 可选地， 所述亮度控制装置更包括： 环境光亮度侦测器， 电性连接所述电流控 制器， 用以侦测环境光， 以获取环境光亮度值； 其中所述电流控制器更接收所 述环境光亮度值， 其中所述操作驱动电流更相关于所述环境光亮度值。
[0009] 可选地， 所述亮度控制装置更包括： 温度侦测单元， 电性连接所述电流控制器 ， 用以侦测所述发光二极管光源的温度， 以获取温度侦测值； 其中所述电流控 制器更接收所述温度侦测值， 其中所述操作驱动电流更相关于所述温度侦测值
[0010] 可选地， 所述发光二级管光源包括至少一发光二极管。
[0011] 可选地， 所述可调整电流源包括： 电阻； 以及幵关电晶体， 其栅极用以接收所 述控制信号， 其漏极用以提供所述操作驱动电流给所述发光二极管光源， 以及 其源极电性所述电阻。
[0012] 可选地， 所述电流控制器采用类神经网路演算或支持向量机演算法。
[0013] 可选地， 通过所述控制信号控制所述幵关电晶体打幵或关闭， 以调整所述操作 驱动电流。
[0014] 可选地， 所述环境光亮度侦测器是光接收二极管。
[0015] 基于前述目的， 本申请实施例提供一种发光二极管光源的亮度控制装置， 包括 ： 计吋单元， 用以计数所述发光二极管光源的使用吋间， 以获取使用吋间计数 值； 亮度设定单元， 用以提供亮度设定值； 可调整电流源， 电性连接所述发光 二极管光源， 用以提供操作驱动电流给所述发光二极管光源； 电流控制器， 电 性连接所述计吋单元、 所述亮度设定单元与所述可调整电流源， 用以基于通过 深度学习获得的预测模型， 根据所述使用吋间计数值与所述亮度设定值计算出 对应所述亮度设定值的操作驱动电流， 并产生控制信号控制所述可调整电流源 提供计算出的所述操作驱动电流给所述发光二极管光源； 环境光亮度侦测器， 电性连接所述电流控制器， 用以侦测环境光， 以获取环境光亮度值； 温度侦测 单元， 电性连接所述电流控制器， 用以侦测所述发光二极管光源的温度， 以获 取温度侦测值； 以及其中所述电流控制器更接收所述环境光亮度值， 其中所述 操作驱动电流更相关于所述环境光亮度值； 其中所述电流控制器更接收所述温 度侦测值， 其中所述操作驱动电流更相关于所述温度侦测值； 其中所述深度学 习采用类神经网路演算或支持向量机演算法。
基于前述目的， 本申请实施例提供一种发光二极管光源的亮度控制方法， 包括 ： 接收亮度设定值与吋间计数值， 其中所述吋间计数值是计数所述发光二极管 光源的使用吋间而得到； 得到基于深度学习算法的预测模型， 基于预测模型， 根据所述亮度设定值与所述使用吋间计数值决定所述发光二极体光源对应所述 亮度设定值的操作驱动电流； 以及产生控制信号以改变所述操作驱动电流， 从 而使得所述发光二极管光源接收决定的所述操作驱动电流。
[0017] 可选地， 接收设定亮度值设备亮度侦测值。
[0018] 可选地， 根据所述设定亮度值与所述设备亮度侦测值产生控制信号。
[0019] 可选地， 接收亮度设定值与温度侦测值。
[0020] 可选地， 所述温度侦测值是侦测所述发光二极管光源的温度而得到。
[0021] 可选地， 得到基于深度学习算法的预测模型， 基于预测模型， 根据所述亮度设 定值与所述温度侦测值决定所述发光二极体光源对应所述亮度设定值的所述操 作驱动电流。
发明的有益效果
有益效果
通过采用上述技术方案， 本申请实施例至少具有以下有益效果： 本申请实施例 提供的发光二极管光源的亮度控制装置与方法不会因为发光二极管光源的使用 吋间的影响， 而导致设备的亮度与亮度设定值有较大的偏差。 本申请更考虑环 境光亮度与发光二极管光源的温度的影响， 来调整发光二极管光源的操作驱动 电流， 以使显示设备或照明设备能达到省电与 /或较佳显示 （照明） 效果的目的 对附图的简要说明
附图说明
[0023] 图 1是本申请实施例的发光二极管光源的亮度控制装置的方块图。
[0024] 图 2是本申请实施例的发光二极管光源的亮度控制方法的流程图。
[0025] 图 3是本申请另一实施例的发光二极管光源的亮度控制装置的方块图。
[0026] 图 4是本申请另一实施例的发光二极管光源的亮度控制方法的流程图。
[0027] 图 5是本申请另一实施例的发光二极管光源的亮度控制装置的方块图。
[0028] 图 6是本申请另一实施例的发光二极管光源的亮度控制方法的流程图。
[0029] 图 7是本申请实施例的显示设备的方块图
本发明的实施方式
[0030] 在下面的描述中， 为了说明的目的， 阐述了许多具体细节， 以便提供对各实施 例的透彻理解。 然而， 显而易见的， 可以在没有这些具体细节或一个或多个等 效配置的情况下实践各种实施例。 在其他实例中， 以方块图式示出了公知的结 构和装置， 以避免不必要地模糊各种实施例。
[0031] 除非另有说明， 所示出的实施例将被理解为提供各种实施例的不同细节的特征 。 因此， 除非另有说明， 否则在不脱离所揭露的实施例的情况下， 各种图示的 特征、 部件、 模组、 层、 膜、 面板、 区及 /或态样可另外组合、 分离、 互换及 /或 重新排列。 此外， 在附图中， 为了清楚描述， 层、 膜、 面板、 区等的尺寸和相 对尺寸可能被夸大。 当可以不同地实现实施例吋， 可以不同于所描述的顺序执 行特定处理顺序。 例如， 可以基本上同吋执行两个连续描述的处理或者以与所 描述的顺序相反的顺序执行。 另外， 相同的元件符号表示相同的元件。
[0032] 本申请实施例提供了一种发光二极管光源的亮度控制装置与方法， 其直接地侦 测使用发光二极管光源的设备的亮度， 并将设备亮度侦测值与使用者设定的设 定亮度值进行比较后， 根据比较结果产生用以改变发光二极管光源的驱动操作 电流的控制信号， 以使得设备的亮度与设定亮度值相似， 而不会因为发光二极 管光源的温度、 使用吋间或设备的组件的影响， 而导致设备的亮度与设定亮度 值有较大的偏差。 可选地， 所述亮度控制装置与方法更考虑环境光亮度的影响 ， 并根据环境光亮度来调整发光二极管光源的操作驱动电流。
[0033] 简单地说， 本申请直接测量发光二极管光源 （或其设备） 现有的亮度， 倘若使 用者要设定某个亮度吋， 根据发光二极管光源现有的亮度是否与设定亮度的差 异是否超出范围， 直接调整操作驱动电流。 进一步地， 本申请还根据环境光亮 度对操作驱动电流进行微调整， 以使得最后的实际亮度接近设定亮度， 并使显 示设备或照明设备能达到省电与 /或可选显示 （照明） 效果的目的。
[0034] 请参照图 1， 图 1是本申请实施例的发光二极管光源的亮度控制装置的方块图。
发光二极管光源 LS (包括至少一个发光二极管， 于此实施例中为串连的多个发 光二极管） 的亮度控制装置 2包括亮度设定单元 21、 发光二极管电流控制器 22、 可调整电流源 23与设备亮度侦测器 24， 其中发光二极管电流控制器 22电性连接 亮度设定单元 21、 可调整电流源 23与设备亮度侦测器 24， 而可调整电流源 23电 性连接发光二极管光源 LS。
[0035] 设备亮度侦测器 24例如可以是光接收二极管， 其用以获取相关于发光二极管光 源 LS的亮度所对应的设备亮度侦测值， 设备亮度侦测值为使用发光二极管光源 L S的设备的亮度， 其中若无其他组件的影响， 设备亮度侦测值为发光二极管光源 LS的亮度。 亮度设定单元 21用以给用户操作或交由作业系统自动操作， 以产生 亮度设定值， 并将提供亮度设定值给发光二极管电流控制器 22。
[0036] 可调整电流源 23用以提供操作驱动电流给发光二极管光源 LS， 并受控于发光二 极管电流控制器 22所产生的控制信号， 以调整操作驱动电流。 可调整电流源 23 可以通过幵关晶体管 Ml与电阻 R1来实现， 但本申请不限制于此。 幵关晶体管 Ml 的栅极接收控制信号， 幵关晶体管 Ml的源极通过电阻 R1电性连接低电压 VSS， 且发光二极管光源的两端分别电性连接高电压 VDD与幵关晶体管 Ml的漏极。 通 过控制幵关晶体管 Ml的幵关， 等效上可以改变发光二极管光源 LS的操作驱动电 流。
[0037] 发光二极管电流控制器 22比较设备亮度侦测值与亮度设定值， 以产生控制信号 来控制可调整电流源 23改变发光二极管光源 LS的操作驱动电流。 进一步地， 发 光二极管电流控制器 22是判断设备亮度侦测值与亮度设定值之间的差异是否超 出范围， 来进一步产生控制信号。 当设备亮度侦测值与亮度设定值之间的差异 未超出， 则不再增加或减少操作驱动电流； 相反地， 则增加或减少操作驱动电 流， 以增加或减少设备侦测亮度值， 从而使得设备侦测亮度值趋近于设定亮度 值。
于本申请实施例中， 更可以考虑环境光亮度的影响。 由于在环境光亮度较亮吋 ， 人眼对设备亮度的变化比较不敏感， 因此， 可以将设备亮度侦测值调整地比 设定亮度值较低， 但设备亮度侦测值与设定亮度值之间的差异仍未超出范围。 另外， 在环境光亮度较暗吋， 人眼对设备亮度的变化比较敏感， 因此， 可以将 设备亮度侦测值调整地比设定亮度值较高， 但设备亮度侦测值与设定亮度值之 间的差异仍未超出范围。 如此， 亮度控制装置 2可以达到省电与 /或可选显示 （照 明） 效果的目的。
[0039] 于图 2中， 亮度控制装置 2更包括环境光亮度侦测器 25， 且环境光亮度侦测器 25 电性连接发光二极管电流控制器 22， 其中环境光亮度侦测器 25可以例如是光接 收二极管。 发光二极管电流控制器 22可以根据环境光亮度侦测器 25获取的环境 光样度值来微调操作驱动电流， 以使得设备亮度侦测值调整地比设定亮度值较 高或低， 但设备亮度侦测值与设定亮度值之间的差异仍未超出范围。
[0040] 接着， 请参照图 2， 图 2是本申请实施例的发光二极管光源的亮度控制方法的流 程图。 于步骤 S31中， 接收设定亮度值设备亮度侦测值。 接着， 在步骤 S32中， 根据设定亮度值与设备亮度侦测值产生控制信号。 之后， 在步骤 S33中， 根据控 制信号改变操作驱动电流。 另外， 亮度控制方法还更包括获取环境光亮度值， 并根据环境光亮度值对操作驱动电流进行微调。
[0041] 前述实施例的发光二极管光源的亮度控制装置与方法， 可以以使得设备的亮度 与设定亮度值相似， 而不会因为发光二极管光源的温度、 使用吋间或设备的组 件的影响， 而导致设备的亮度与设定亮度值有较大的偏差。 另外， 所述亮度控 制装置与方法更考虑环境光亮度的影响， 并根据环境光亮度来调整发光二极管 光源的操作驱动电流， 以使显示设备或照明设备能达到省电与 /或可选显示 （照 明） 效果的目的。
[0042] 本申请另一实施例提供了一种发光二极管光源的亮度控制装置与方法， 其使用 深度学习演算法训练出预测模型， 如此基于预测模型根据亮度设定值与温度侦 测值， 可以精确地算出发光二极管光源所需要使用的操作驱动电流， 并且据此 产生控制信号来控制操作驱动电流。 如此一来， 发光二极管光源的亮度可以趋 近亮度设定值， 而不会因为温度改变， 导致光二极管光源的亮度偏离亮度设定 值。 简单地说， 本申请不会因为发光二极管光源的温度的影响， 而导致设备的 亮度与亮度设定值有较大的偏差。
[0043] 可选地， 本申请更考虑环境光亮度的影响， 并根据环境光亮度来调整发光二极 管光源的操作驱动电流， 以使得最后的实际亮度接近设定亮度， 并使显示设备 或照明设备能达到省电与 /或较佳可选显示 （照明） 效果的目的。
[0044] 另外， 前述深度学习演算法可以通过类神经网路演算法或支持向量机演算法来 实现。 进一步地， 于亮度控制装置出厂前， 根据训练集先训练好预测模型， 之 后， 亮度控制装置便能基于预测模型， 根据温度侦测值与亮度设定值计算出发 光二极管光源所需使用的操作驱动电流。 前述训练集为多笔已知的温度侦测值 、 多笔已知的亮度设定值与使其发光二极管光源的亮度等于多笔已知的亮度设 定值所对应的多个已知的操作驱动电流。 以类神经网路演算法来看， 训练集可 以用以找出类神经网路的各节点的权重， 以训练出预测模型。
[0045] 请参照图 3， 图 3是本申请另一实施例的发光二极管光源的亮度控制装置的方块 图。 发光二极管光源 LS (包括至少一个发光二极管， 于此实施例中为串连的多 个发光二极管） 的亮度控制装置 4包括亮度设定单元 41、 温度侦测单元 42、 电流 控制器 43与可调整电流源 44。 电流控制器 43电性连接亮度设定单元 41、 温度侦 测单元 42与可调整电流源 44， 而可调整电流源 34电性连接发光二极管光源 LS。
[0046] 温度侦测单元 42用以侦测发光二极管光源 LS的温度， 并且产生温度侦测值给电 流控制器 43。 亮度设定单元 41用以给用户操作或交由作业系统自动操作， 以产 生亮度设定值， 并将提供亮度设定值给电流控制器 43。
[0047] 由于温度可能改变发光二极管光源 LS的电气特性， 导致同样的操作驱动电流在 不同温度下， 发光二极管光源 LS所发出的光线的亮度不同， 因此， 本申请使用 深度学习演算法来找出非线性关系的温度、 亮度设定值与操作驱动电流的预测 模型。 电流控制器 43基于预测模型， 可根据亮度设定值与温度侦测值计算出使 发光二极管光源 LS发出光线的亮度等于亮度设定值的操作驱动电流。
[0048] 接着， 电流控制器 43根据计算出来的操作驱动电流产生控制信号， 以使得可调 整电流源 44提供计算出来的操作驱动电流给发光二极管光源 LS。 可调整电流源 34可以通过幵关晶体管 Ml与电阻 R1来实现， 但本申请不限制于此。 幵关晶体管 Ml的栅极接收控制信号， 幵关晶体管 Ml的源极通过电阻 R1电性连接低电压 VSS ， 且发光二极管光源的两端分别电性连接高电压 VDD与幵关晶体管 Ml的漏极。 通过控制幵关晶体管 Ml的幵关， 等效上可以改变发光二极管光源 LS的操作驱动 电流。
[0049] 于本申请实施例中， 更可以考虑环境光亮度的影响。 由于在环境光亮度较亮吋 ， 人眼对设备亮度的变化比较不敏感， 因此， 可以将发光二极管光源 LS的亮度 调整地比亮度设定值略低一点。 另外， 在环境光亮度较暗吋， 人眼对设备亮度 的变化比较敏感， 因此， 可以将发光二极管光源 LS的亮度调整地比亮度设定值 略高一点。 如此， 亮度控制装置 3可以达到省电与 /或较佳显示 （照明） 效果的目 的。
[0050] 于图 3中， 亮度控制装置 4更包括环境光亮度侦测器 45， 且环境光亮度侦测器 35 电性连接电流控制器 43， 其中环境光亮度侦测器 45可以例如是光接收二极管。 电流控制器 43更可以根据环境光亮度侦测器 45获取的环境光亮度值来微调操作 驱动电流， 以使得发光二极管光源所发射的光线的亮度比亮度设定值略高略低
[0051] 进一步地， 电流控制器 43是基于预测模型， 根据亮度设定值、 温度侦测值与环 境光亮度值来算出此吋发光二极管光源 LS所需的操作驱动电流。 因此， 训练集 包括了多笔已知的温度侦测值、 多笔已知的环境光亮度值、 多笔已知的亮度设 定值与使其发光二极管光源的亮度略高或略低于多笔已知的亮度设定值所对应 的多个已知的操作驱动电流。 又或者， 电流控制器 43是基于预测模型， 根据亮 度设定值与温度侦测值来算出操作驱动电流后， 根据环境光亮度值来微调操作 驱动电流。 [0052] 接着， 请参照图 4， 图 4是本申请另一实施例的发光二极管光源的亮度控制方法 的流程图。 于步骤 S51中， 接收亮度设定值与温度侦测值， 其中温度侦测值是侦 测发光二极管光源的温度而得到。 接着， 在步骤 S52中， 得到基于深度学习算法 的预测模型， 基于预测模型， 根据亮度设定值与温度侦测值决定发光二极体光 源对应亮度设定值的操作驱动电流。 之后， 在步骤 S53中， 产生控制信号以改变 操作驱动电流， 从而使得发光二极管光源接收前述决定的操作驱动电流。 另外 ， 亮度控制方法还更包括获取环境光亮度值， 并根据环境光亮度值对操作驱动 电流进行调整。
[0053] 前述实施例的发光二极管光源的亮度控制装置与方法， 可以使得设备的亮度与 亮度设定值相似， 而不会因为发光二极管光源的温度的影响， 而导致设备的亮 度与亮度设定值有较大的偏差。 另外， 所述亮度控制装置与方法更考虑环境光 亮度的影响， 并根据环境光亮度来调整发光二极管光源的操作驱动电流， 以使 显示设备或照明设备能达到省电与 /或较佳显示 （照明） 效果的目的。
[0054] 本申请另一实施例提供了一种发光二极管光源的亮度控制装置与方法， 其使用 深度学习演算法训练出预测模型， 如此基于预测模型根据亮度设定值与发光二 极管光源的使用吋间计数值， 可以精确地算出发光二极管光源所需要使用的操 作驱动电流， 并且据此产生控制信号来控制操作驱动电流。 如此一来， 发光二 极管光源的亮度可以趋近亮度设定值， 而不会因为发光二极管光源的使用吋间 的影响， 导致光二极管光源的亮度偏离亮度设定值。 简单地说， 本申请不会因 为发光二极管光源的使用吋间的影响， 而导致设备的亮度与亮度设定值有较大 的偏差。
[0055] 可选地， 本申请更考虑环境光亮度与发光二极管光源的温度的影响， 并根据环 境光亮度与发光二极管光源的温度侦测值来调整发光二极管光源的操作驱动电 流， 以使得最后的实际亮度接近设定亮度， 并使显示设备或照明设备能达到省 电与 /或较佳显示 （照明） 效果的目的。
[0056] 另外， 前述深度学习演算法可以通过类神经网路演算法或支持向量机演算法来 实现。 进一步地， 于亮度控制装置出厂前， 根据训练集先训练好预测模型， 之 后， 亮度控制装置便能基于预测模型， 根据温度侦测值与亮度设定值计算出发 光二极管光源所需使用的操作驱动电流。 前述训练集为多笔已知的使用吋间计 数值、 多笔已知的使亮度设定值与使其发光二极管光源的亮度等于多笔已知的 使亮度设定值所对应的多个已知的使操作驱动电流。 以类神经网路演算法来看 ， 训练集可以用以找出类神经网路的各节点的权重， 以训练出预测模型。
[0057] 请参照图 5， 图 5是本申请另一实施例的发光二极管光源的亮度控制装置的方块 图。 发光二极管光源 LS (包括至少一个发光二极管， 于此实施例中为串连的多 个发光二极管） 的亮度控制装置 6包括亮度设定单元 61、 计吋单元 62、 电流控制 器 63与可调整电流源 64。 电流控制器 63电性连接亮度设定单元 61、 计吋单元 62 与可调整电流源 64， 而可调整电流源 64电性连接发光二极管光源 LS。
[0058] 计吋单元 62用以计数发光二极管光源 LS的使用吋间， 并且产生使用吋间计数值 给电流控制器 63。 亮度设定单元 61用以给用户操作或交由作业系统自动操作， 以产生亮度设定值， 并将提供亮度设定值给电流控制器 63。
[0059] 由于计数发光二极管光源 LS的使用吋间可能改变发光二极管光源 LS的电气特 性， 导致同样的操作驱动电流在不同吋间下， 发光二极管光源 LS所发出的光线 的亮度不同， 因此， 本申请使用深度学习演算法来找出非线性关系的使用吋间 、 亮度设定值与操作驱动电流的预测模型。 电流控制器 63基于预测模型， 可根 据亮度设定值与使用吋间计数值计算出使发光二极管光源 LS发出光线的亮度等 于亮度设定值的操作驱动电流。
[0060] 接着， 电流控制器 63根据计算出来的操作驱动电流产生控制信号， 以使得可调 整电流源 64提供计算出来的操作驱动电流给发光二极管光源 LS。 可调整电流源 64可以通过幵关晶体管 Ml与电阻 R1来实现， 但本申请不限制于此。 幵关晶体管 Ml的栅极接收控制信号， 幵关晶体管 Ml的源极通过电阻 R1电性连接低电压 VSS ， 且发光二极管光源的两端分别电性连接高电压 VDD与幵关晶体管 Ml的漏极。 通过控制幵关晶体管 Ml的幵关， 等效上可以改变发光二极管光源 LS的操作驱动 电流。
[0061] 于本申请实施例中， 更可以考虑环境光亮度的影响。 由于在环境光亮度较亮吋 ， 人眼对设备亮度的变化比较不敏感， 因此， 可以将发光二极管光源 LS的亮度 调整地比亮度设定值略低一点。 另外， 在环境光亮度较暗吋， 人眼对设备亮度 的变化比较敏感， 因此， 可以将发光二极管光源 LS的亮度调整地比亮度设定值 略高一点。 如此， 亮度控制装置 6可以达到省电与 /或较佳显示 （照明） 效果的目 的。
[0062] 于图 5中， 亮度控制装置 6更包括环境光亮度侦测器 65， 且环境光亮度侦测器 65 电性连接电流控制器 63， 其中环境光亮度侦测器 65可以例如是光接收二极管。 电流控制器 63更可以根据环境光亮度侦测器 65获取的环境光亮度值来微调操作 驱动电流， 以使得发光二极管光源所发射的光线的亮度比亮度设定值略高略低
[0063] 进一步地， 电流控制器 63是基于预测模型， 根据亮度设定值、 使用吋间计数值 与环境光亮度值来算出此吋发光二极管光源 LS所需的操作驱动电流。 因此， 训 练集包括了多笔已知的使用吋间计数值、 多笔已知的环境光亮度值、 多笔已知 的亮度设定值与使其发光二极管光源的亮度略高或略低于多笔已知的亮度设定 值所对应的多个已知的操作驱动电流。 又或者， 电流控制器 63是基于预测模型 ， 根据亮度设定值与使用吋间计数值来算出操作驱动电流后， 根据环境光亮度 值来微调操作驱动电流。
[0064] 于图 5中， 亮度控制装置 6更包括电性连接电流控制器 63的温度侦测单元 66。 由 于温度也会影响发光二极管光源 LS的电气特性， 因此， 本申请通过温度侦测单 元 66侦测发光二极管光源 LS的温度， 并考量温度侦测值来计算出操作驱动电流 。 进一步地说， 电流控制器 63可以是基于预测模型， 根据亮度设定值、 使用吋 间计数值与温度侦测值来算出此吋发光二极管光源 LS所需的操作驱动电流。 因 此， 训练集包括了多笔已知的使用吋间计数值、 多笔已知的温度侦测值、 多笔 已知的亮度设定值与使其发光二极管光源的亮度等于多笔已知的亮度设定值所 对应的多个已知的操作驱动电流。
[0065] 接着， 请参照图 6， 图 6是本申请另一实施例的发光二极管光源的亮度控制方法 的流程图。 于步骤 S71中， 接收亮度设定值与使用吋间计数值， 其中使用吋间计 数值是计数发光二极管光源的使用使间而得到。 接着， 在步骤 S72中， 得到基于 深度学习算法的预测模型， 基于预测模型， 根据亮度设定值与使用吋间计数值 决定发光二极体光源对应亮度设定值的操作驱动电流。 之后， 在步骤 S73中， 产 生控制信号以改变操作驱动电流， 从而使得发光二极管光源接收前述决定的操 作驱动电流。 另外， 亮度控制方法还更包括获取环境光亮度值与发光二极管光 源的温度侦测值， 并根据环境光亮度值与温度侦测值对操作驱动电流进行调整
[0066] 前述实施例的发光二极管光源的亮度控制装置与方法， 可以使得设备的亮度与 亮度设定值相似， 而不会因为发光二极管光源的使用吋间的影响， 而导致设备 的亮度与亮度设定值有较大的偏差。 另外， 所述亮度控制装置与方法更考虑环 境光亮度与发光二极管光源的温度的影响， 并根据环境光亮度与侦测温度值来 调整发光二极管光源的操作驱动电流， 以使显示设备或照明设备能达到省电与 / 或较佳显示 （照明） 效果的目的。
[0067] 最后， 请参照图 7， 图 7是本申请实施例的显示设备的方块图。 显示设备 8包括 背光源 81、 电源供应器 82、 液晶面板 83、 驱动电路 84与亮度控制装置 85。 电源 供应器 82电性连接背光源 81、 液晶面板 83、 驱动电路 84与亮度控制装置 85， 亮 度控制装置 85电性连接背光源 81， 以及液晶面板 83电性连接驱动电路 84。
[0068] 电源供应器 82用以提供供应电源给背光源 81、 液晶面板 83、 驱动电路 84与亮度 控制装置 85。 驱动电路 84包括栅极驱动电路与资料驱动电路， 用以选择液晶面 板 83其中的像素， 并传送资料信号给选择的像素。 背光源 81可以是前述发光二 极管光源， 而亮度控制装置 85可以是前述亮度控制装置。
[0069] 上述多个实施例的内容是本申请的众多实施方式的至少其中之一， 本申请所属 技术领域具有通常知识者在阅读上述内容后， 自当可以理解本申请的核心概念 ， 并且视其需求对上述实施例进行修改。 换言之， 上述实施例的内容并非用以 限制本申请， 且本申请所保护的范围以权利要求书的文字来界定。

Claims

权利要求书
一种发光二极管光源的亮度控制装置， 其特征在于， 所述亮度控制装 置包括：
计吋单元， 计数所述发光二极管光源的使用吋间， 以获取使用吋间计 数值；
亮度设定单元， 提供亮度设定值；
可调整电流源， 电性连接所述发光二极管光源， 以提供操作驱动电流 给所述发光二极管光源； 以及
电流控制器， 电性连接所述计吋单元、 所述亮度设定单元与所述可调 整电流源， 以基于通过深度学习获得的预测模型， 根据所述使用吋间 计数值与所述亮度设定值计算出对应所述亮度设定值的操作驱动电流
， 并产生控制信号控制所述可调整电流源提供计算出的所述操作驱动 电流给所述发光二极管光源。
如权利要求 1所述的发光二极管光源的亮度控制装置， 其特征在于， 所述亮度控制装置更包括：
环境光亮度侦测器， 电性连接所述电流控制器， 以侦测环境光， 而获 取环境光亮度值；
其中所述电流控制器更接收所述环境光亮度值， 其中所述操作驱动电 流更相关于所述环境光亮度值。
如权利要求 1或 2所述的发光二极管光源的亮度控制装置， 其特征在于 ， 所述亮度控制装置更包括：
温度侦测单元， 电性连接所述电流控制器， 以侦测所述发光二极管光 源的温度， 以获取温度侦测值；
其中所述电流控制器更接收所述温度侦测值， 其中所述操作驱动电流 更相关于所述温度侦测值。
如权利要求 1所述的发光二极管光源的亮度控制装置， 其特征在于， 所述发光二级管光源包括至少一发光二极管。
如权利要求 1所述的发光二极管光源的亮度控制装置， 其特征在于， 所述可调整电流源包括： 电阻； 以及
幵关电晶体， 其栅极接收所述控制信号， 其漏极提供所述操作驱动电 流给所述发光二极管光源， 以及其源极电性所述电阻。
[权利要求 6] 如权利要求 1所述的发光二极管光源的亮度控制装置， 其特征在于， 所述深度学习采用类神经网路演算或支持向量机演算法。
[权利要求 7] 如权利要求 5所述的发光二极管光源的亮度控制装置， 其特征在于， 其中通过所述控制信号控制所述幵关电晶体打幵或关闭， 以调整所述 操作驱动电流。
[权利要求 8] 如权利要求 2所述的发光二极管光源的亮度控制装置， 其特征在于， 所述环境光亮度侦测器是光接收二极管。
[权利要求 9] 一种发光二极管光源的亮度控制装置， 其特征在于， 所述亮度控制装 置包括：
计吋单元， 计数所述发光二极管光源的使用吋间， 以获取使用吋间计 数值；
亮度设定单元， 提供亮度设定值；
可调整电流源， 电性连接所述发光二极管光源， 以提供操作驱动电流 给所述发光二极管光源；
电流控制器， 电性连接所述计吋单元、 所述亮度设定单元与所述可调 整电流源， 以基于通过深度学习获得的预测模型， 根据所述使用吋间 计数值与所述亮度设定值计算出对应所述亮度设定值的操作驱动电流
， 并产生控制信号控制所述可调整电流源提供计算出的所述操作驱动 电流给所述发光二极管光源；
环境光亮度侦测器， 电性连接所述电流控制器， 以侦测环境光， 而获 取环境光亮度值；
温度侦测单元， 电性连接所述电流控制器， 以侦测所述发光二极管光 源的温度， 以获取温度侦测值； 以及
其中所述电流控制器更接收所述环境光亮度值， 其中所述操作驱动电 流更相关于所述环境光亮度值；
其中所述电流控制器更接收所述温度侦测值， 其中所述操作驱动电流 更相关于所述温度侦测值；
其中所述深度学习采用类神经网路演算或支持向量机演算法。
[权利要求 10] —种发光二极管光源的亮度控制方法， 其特征在于， 所述亮度控制方 法包括：
接收亮度设定值与使用吋间计数值， 其中所述使用吋间计数值是计数 所述发光二极管光源的使用吋间而得到；
得到基于深度学习算法的预测模型， 基于预测模型， 根据所述亮度设 定值与所述使用吋间计数值决定所述发光二极体光源对应所述亮度设 定值的操作驱动电流； 以及
产生控制信号以改变所述操作驱动电流， 从而使得所述发光二极管光 源接收决定的所述操作驱动电流。
[权利要求 11] 如权利要求 10所述的发光二极管光源的亮度控制方法， 其特征在于， 还包括接收设定亮度值设备亮度侦测值。
[权利要求 12] 如权利要求 11所述的发光二极管光源的亮度控制方法， 其特征在于， 根据所述设定亮度值与所述设备亮度侦测值产生控制信号。
[权利要求 13] 如权利要求 10所述的发光二极管光源的亮度控制方法， 其特征在于， 还包括接收亮度设定值与温度侦测值。
[权利要求 14] 如权利要求 13所述的发光二极管光源的亮度控制方法， 其特征在于， 所述温度侦测值是侦测所述发光二极管光源的温度而得到。
[权利要求 15] 如权利要求 13所述的发光二极管光源的亮度控制方法， 其特征在于， 得到基于深度学习算法的预测模型， 基于预测模型， 根据所述亮度设 定值与所述温度侦测值决定所述发光二极体光源对应所述亮度设定值 的所述操作驱动电流。
PCT/CN2017/111199 2017-10-26 2017-11-15 发光二极管光源的亮度控制装置与方法 WO2019080204A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711014226.7 2017-10-26
CN201711014226.7A CN107635319A (zh) 2017-10-26 2017-10-26 发光二极管光源的亮度控制装置与方法

Publications (1)

Publication Number Publication Date
WO2019080204A1 true WO2019080204A1 (zh) 2019-05-02

Family

ID=61105057

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/111199 WO2019080204A1 (zh) 2017-10-26 2017-11-15 发光二极管光源的亮度控制装置与方法

Country Status (2)

Country Link
CN (1) CN107635319A (zh)
WO (1) WO2019080204A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115202140A (zh) * 2021-04-14 2022-10-18 中强光电股份有限公司 投影装置及其亮度控制方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101795511A (zh) * 2009-02-02 2010-08-04 广达电脑股份有限公司 光源补偿方法
CN101833928A (zh) * 2010-04-24 2010-09-15 华映光电股份有限公司 显示器与相关的背光模组发光亮度调整方法
CN101994930A (zh) * 2009-08-14 2011-03-30 连营科技股份有限公司 具有补偿机制的发光二极管装置
CN104077991A (zh) * 2013-03-25 2014-10-01 刘鸿达 显示装置及其色温调整方法
CN104540269A (zh) * 2014-12-08 2015-04-22 闽南师范大学 一种混合白光led照明系统及其照度及色温的控制方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101795511A (zh) * 2009-02-02 2010-08-04 广达电脑股份有限公司 光源补偿方法
CN101994930A (zh) * 2009-08-14 2011-03-30 连营科技股份有限公司 具有补偿机制的发光二极管装置
CN101833928A (zh) * 2010-04-24 2010-09-15 华映光电股份有限公司 显示器与相关的背光模组发光亮度调整方法
CN104077991A (zh) * 2013-03-25 2014-10-01 刘鸿达 显示装置及其色温调整方法
CN104540269A (zh) * 2014-12-08 2015-04-22 闽南师范大学 一种混合白光led照明系统及其照度及色温的控制方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115202140A (zh) * 2021-04-14 2022-10-18 中强光电股份有限公司 投影装置及其亮度控制方法
US11917340B2 (en) 2021-04-14 2024-02-27 Coretronic Corporation Projection device and brightness control method thereof

Also Published As

Publication number Publication date
CN107635319A (zh) 2018-01-26

Similar Documents

Publication Publication Date Title
WO2019080205A1 (zh) 发光二极管光源的亮度控制装置与方法
US10045419B2 (en) Color-temperature adjustable LED lightning device and method for adjusting color temperature of LED lighting device
WO2019080206A1 (zh) 发光二极管光源的亮度控制装置与方法
US9257067B2 (en) Light source driving circuit of light emitting semiconductor and backlight module
CN102573214B (zh) Led驱动电路和led照明装置
US9355610B2 (en) Power supply and method for controlling the same
US9780875B2 (en) Visible light communication modulation circuit, illumination device, illumination apparatus and visible light communication system
CN105050246A (zh) 一种移动终端调节灯光亮度的方法和移动终端
WO2015089928A1 (zh) 背光调节电路及电子装置
KR20170010212A (ko) 백라이트 유닛 및 백라이트 유닛을 포함하는 표시 장치
US11395383B2 (en) Lighting device and lighting control system thereof
CN104011590A (zh) 投射型显示设备和用于控制投射型显示设备的操作的方法
WO2019080204A1 (zh) 发光二极管光源的亮度控制装置与方法
US20130257294A1 (en) Illuminating apparatus and control method for keeping a constant total brightness of ambient light and light produced by the illuminating apparatus
US9445479B2 (en) Dimming control method and apparatus and dimming system
US20100265227A1 (en) Intelligent digital photo frame
TWI498699B (zh) 訊號平衡系統、光源控制系統及其平衡訊號之方法
CN102281686A (zh) Led灯在输入电压快速跌落时的补偿控制装置及其方法
TW202121893A (zh) 維持訊號相對關係的訊號處理方法及其電子裝置
US8482210B2 (en) Luminance adjusting circuit
CN108335676A (zh) 显示装置
WO2019080307A1 (zh) 显示系统及电流驱动方法
WO2022077722A1 (zh) 驱动装置及电子设备
JP6463188B2 (ja) テレビジョン受信機
JP2018032613A (ja) 微小調光モジュール

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17930035

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17930035

Country of ref document: EP

Kind code of ref document: A1