CN106205503B - A kind of LED luminance adjusting method and device - Google Patents
A kind of LED luminance adjusting method and device Download PDFInfo
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- CN106205503B CN106205503B CN201610628819.1A CN201610628819A CN106205503B CN 106205503 B CN106205503 B CN 106205503B CN 201610628819 A CN201610628819 A CN 201610628819A CN 106205503 B CN106205503 B CN 106205503B
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- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/3406—Control of illumination source
Abstract
The present embodiments relate to field of display technology more particularly to a kind of LED luminance adjusting methods and device, can be with the scheme of balance power consumption and the duration of brightness change process for providing one.In the embodiment of the present invention, the object brightness of LED is obtained；When the present intensity for determining object brightness and LED is inconsistent, according to object brightness, the first brightness and the second brightness are determined；The voltage of LED is adjusted to the corresponding voltage of the first brightness, and the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness, so that the brightness of LED reaches object brightness under the action of the corresponding voltage of the first brightness and the second brightness corresponding PWM duty cycle.The present invention realizes the balance between the duration of the power consumption and brightness change process when adjusting LED luminance, has both guaranteed that power consumption was not too big, also guarantees that the duration of LED luminance change procedure will not be too long.
Description
Technical field
The present embodiments relate to field of display technology more particularly to a kind of LED luminance adjusting methods and device.
Background technique
Currently, light emitting diode (Light Emitting Diode, abbreviation LED) is in use, the function of backlight
Consumption accounts for major part in the power consumption of LED, in order to by the lower power consumption of LED, need to reduce by the brightness of adjusting LED backlight
Power consumption.
In the prior art, there are mainly two types of the brightness that method adjusts LED, a kind of method is that voltage control method (is simulated
Light modulation), this control method adjusts the brightness of LED light by adjusting the voltage loaded in LED, specifically, by the electricity of LED
Pressure is adjusted to target voltage, and it is the corresponding brightness of target voltage that LED slowly changes from present intensity, corresponding bright in target voltage
Reach stable state at degree, LED is changed to the corresponding brightness of target voltage from present intensity and needs by a duration.In general,
The duration is longer, but lower with the mode power consumption that voltage adjusts LED luminance.
Another method is pulse width modulation (Pulse Width Modulation, abbreviation PWM) duty ratio controlling party
Method (i.e. digital dimming), this control method carry out adjusting brightness of LED lamps by adjusting the PWM duty cycle that power supply flickers, specific next
It says, is controlled by the on-off to inverter circuit switching device, output end is made to obtain a series of equal pulse of amplitudes, one
The ratio that high level accounts in whole cycle in pulse period is exactly PWM duty cycle.The duty ratio of LED is adjusted to target PWM
Duty ratio, the brightness of LED quickly change to the corresponding brightness of target PWM duty cycle from present intensity.By adjusting PWM duty cycle
Brightness of the mode to adjust LED when, it is corresponding that the brightness of LED quickly can be changed to target PWM duty cycle from present intensity
Brightness, but this kind of regulative mode power consumption is higher.
Currently, in the prior art, the main control method using any one of both the above method carries out the bright of LED light
Degree is adjusted.It is individually smaller using voltage control method power consumption, but the brightness change process of LED is longer, i.e. LED is by very long
Time brightness can be only achieved stable state；Individually shorter using PWM duty cycle control method brightness change process, i.e. LED passes through
Very short time brightness reaches stable state, but power consumption is larger.At present when adjusting the brightness of LED display, without one
It is a can be in the method for balance power consumption and the duration of brightness change process, therefore need corresponding solution.
Summary of the invention
The embodiment of the present invention provides a kind of LED luminance adjusting method and device, to realize the function when adjusting LED luminance
Consume the duration of brightness change process between balance, both guaranteed that power consumption was not too big, also guarantee LED luminance change procedure when
Length will not be too long.
The embodiment of the present invention provides a kind of Light-emitting diode LED brightness adjusting method, comprising:
Obtain the object brightness of LED；
When the present intensity for determining object brightness and LED is inconsistent, according to object brightness, the first brightness and are determined
Two brightness；
The voltage of LED is adjusted to the corresponding voltage of the first brightness, and the duty ratio of LED is adjusted to the second brightness and is corresponded to
PWM duty cycle so that effect of the brightness of LED in the corresponding voltage of the first brightness and the corresponding PWM duty cycle of the second brightness
Under reach object brightness.
Optionally, when object brightness is greater than the present intensity of LED, the first brightness is less than object brightness, and object brightness is small
In the second brightness；
When object brightness is less than the present intensity of LED, the first brightness is greater than object brightness, and object brightness is bright greater than second
Degree.
Optionally, the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness, comprising:
Determine third brightness；Wherein, when object brightness is greater than the present intensity of LED, third brightness is greater than the second brightness；Mesh
When marking present intensity of the brightness less than LED, third brightness is less than the second brightness；
The duty ratio of LED is adjusted to the corresponding PWM duty cycle of third brightness, and maintains preset target duration；
When by preset target duration, the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness.
Optionally, target duration meets the following conditions:
The voltage of LED is adjusted to the corresponding voltage of the first brightness, while the duty ratio of LED is adjusted to institute's third brightness
Corresponding PWM duty cycle, and when maintaining target duration:
LED luminance reaches object brightness.
Optionally, target duration is less than: after the voltage of LED is adjusted to the corresponding voltage of the first brightness, LED is bright first
It spends under corresponding voltage and reaches the duration of stable state；Or
Target duration is equal to: after the voltage of LED is adjusted to the corresponding voltage of the first brightness, LED is corresponding in the first brightness
Voltage under reach stable state duration half.
The embodiment of the present invention provides a kind of Light-emitting diode LED brightness regulating apparatus, comprising:
Acquiring unit, for obtaining the object brightness of LED；
Determination unit, for according to object brightness, determining when the present intensity for determining object brightness and LED is inconsistent
First brightness and the second brightness out；
Adjustment unit for the voltage of LED to be adjusted to the corresponding voltage of the first brightness, and the duty ratio of LED is adjusted
For the corresponding PWM duty cycle of the second brightness, so that the brightness of LED is corresponding in the corresponding voltage of the first brightness and the second brightness
Reach object brightness under the action of PWM duty cycle.
Optionally, when object brightness is greater than the present intensity of LED, the first brightness is less than object brightness, and object brightness is small
In the second brightness；
When object brightness is less than the present intensity of LED, the first brightness is greater than object brightness, and object brightness is bright greater than second
Degree.
Optionally it is determined that unit, is also used to:
Determine third brightness；Wherein, when object brightness is greater than the present intensity of LED, third brightness is greater than the second brightness；Mesh
When marking present intensity of the brightness less than LED, third brightness is less than the second brightness；
Adjustment unit is used for when the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness:
The duty ratio of LED is adjusted to the corresponding PWM duty cycle of third brightness, and maintains preset target duration；
When by preset target duration, the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness.
Optionally, target duration meets the following conditions:
The voltage of LED is adjusted to the corresponding voltage of the first brightness, while the duty ratio of LED is adjusted to institute's third brightness
Corresponding PWM duty cycle, and when maintaining target duration:
LED luminance reaches object brightness.
Optionally, target duration is less than: after the voltage of LED is adjusted to the corresponding voltage of the first brightness, LED is first
Reach the duration of stable state under the corresponding voltage of brightness；Or
Target duration is equal to: after the voltage of LED is adjusted to the corresponding voltage of the first brightness, LED is corresponding in the first brightness
Voltage under reach stable state duration half.
In the embodiment of the present invention, the object brightness of LED is obtained；It is inconsistent in the present intensity for determining object brightness and LED
When, according to object brightness, determine the first brightness and the second brightness；The voltage of LED is adjusted to the corresponding voltage of the first brightness；
And the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness, so that LED is in the corresponding voltage of the first brightness and
The brightness for reaching stable state under the action of the corresponding PWM duty cycle of two brightness is object brightness.As it can be seen that the embodiment of the present invention
In, the voltage of LED had both been adjusted, has also adjusted the PWM duty cycle of LED, therefore LED is in the corresponding voltage of the first brightness and the second brightness
The brightness for reaching stable state under the collective effect of corresponding PWM duty cycle is object brightness, so, on the one hand, compared to existing
In technology in such a way that the voltage for individually adjusting LED adjusts the brightness of LED, PWM duty is additionally used in the embodiment of the present invention
The regulative mode of ratio, therefore the embodiment of the present invention can accelerate the brightness of LED and reach time of object brightness；On the other hand, phase
In the mode of PWM duty cycle for individually adjusting LED than in the prior art, the voltage of LED is always maintained at maximum value, immutable
It is dynamic, in the embodiment of the present invention while being adjusted using PWM duty cycle, also the voltage of LED is adjusted, therefore can make
The voltage of LED need not maintain always maximum value, to reduce the power consumption of LED luminance condition, adjust LED to realize
Balance between power consumption when brightness and the duration of brightness change process had both guaranteed that power consumption was not too big, also guaranteed that LED luminance becomes
The duration of change process will not be too long.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced.
Fig. 1 is a kind of system structure diagram that the embodiment of the present invention is applicable in；
Fig. 2 is a kind of LED luminance adjusting method flow diagram provided in an embodiment of the present invention；
Brightness and the time history that Fig. 2 a is a kind of LED provided in an embodiment of the present invention；
Brightness and the time history that Fig. 2 b is another kind LED provided in an embodiment of the present invention；
Fig. 2 c is the curve graph that a kind of LED luminance provided in an embodiment of the present invention is adjusted；
Fig. 2 d is a kind of brightness and power relation curve graph of LED provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of LED luminance regulating device provided in an embodiment of the present invention.
Specific embodiment
In order to which the purpose of the present invention, technical solution and beneficial effect is more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
Fig. 1 is a kind of system structure diagram that the embodiment of the present invention is applicable in, as shown in Figure 1, the embodiment of the present invention is applicable in
System structure 100 include LED101, LED luminance regulating device 102, voltage-operated device 103 and PWM duty cycle control
Device 104.
LED101 can for television set, computer, mobile phone display screen backlight, in the embodiment of the present invention its brightness regulation by
The control of voltage-operated device 103 and PWM duty cycle control device 104.103 output voltage of voltage-operated device is extremely
LED101, by adjusting the voltage of LED to achieve the purpose that the brightness for adjusting LED101.PWM duty cycle control device 104 is defeated
PWM duty cycle is to LED101 out, by adjusting the PWM duty cycle of LED to achieve the purpose that the brightness for adjusting LED101.
In a circuit, when only brightness by adjusting the voltage of LED to adjust LED, in the brightness and LED of LED
The voltage loaded has certain functional relation, thus LED brightness and LED on the voltage that loads have one-to-one relationship.When
When only adjusting the brightness of LED by the PWM duty cycle of LED, also have in the brightness of LED and circuit by the PWM duty cycle of LED
Certain functional relation, the brightness of LED have certain functional relation with by the PWM duty cycle of LED, thus the brightness of LED with
There is one-to-one relationship by the PWM duty cycle of the LED.
In the embodiment of the present invention, the voltage of LED and the PWM duty cycle of LED can be adjusted simultaneously, reach adjustment LED luminance
Purpose.Optionally, the detailed process that LED luminance is adjusted are as follows: voltage-operated device 103 is adjusted by LED luminance regulating device 102
Output voltage, so that the output voltage of voltage-operated device 103 is reached the corresponding voltage of the first brightness；Adjust PWM duty cycle control
The PWM duty cycle of device 104 processed reaches the corresponding PWM duty cycle of the second brightness, so that LED101 is corresponding in the first brightness
Voltage and the corresponding PWM duty cycle of the second brightness collective effect under reach object brightness.
LED luminance regulating device 102 is used for 103 output signal of voltage-operated device, to reach adjustment voltage control dress
Set the purpose of the voltage of 103 outputs；LED luminance regulating device 102 is used for 104 output signal of PWM duty cycle control device, with
Achieve the purpose that adjust the PWM duty cycle that PWM duty cycle control device 104 exports.
Based on system shown in Figure 1 structure, Fig. 2 illustrates a kind of LED luminance provided in an embodiment of the present invention and adjusts
Method flow schematic diagram, as shown in Fig. 2, this method comprises:
Step S2001 obtains the object brightness of LED；
Step S2002, according to object brightness, determines when the present intensity for determining object brightness and LED is inconsistent
One brightness and the second brightness；
The voltage of LED is adjusted to the corresponding voltage of the first brightness by step S2003；And the duty ratio of LED is adjusted to
The corresponding PWM duty cycle of two brightness, so that the brightness of LED is accounted in the corresponding voltage of the first brightness and the corresponding PWM of the second brightness
Sky than under the action of reaches object brightness.
Optionally, when object brightness is consistent with the present intensity of LED, no longer LED luminance is adjusted.
So, on the one hand, compared to the prior art in such a way that the voltage for individually adjusting LED adjusts the brightness of LED, this
Additionally use the regulative mode of PWM duty cycle in inventive embodiments, therefore the embodiment of the present invention can accelerate the brightness of LED and reach
The time of object brightness；On the other hand, in the mode of PWM duty cycle for individually adjusting LED compared to the prior art, the electricity of LED
Pressure is always maintained at maximum value, immutable, also right in the embodiment of the present invention while being adjusted using PWM duty cycle
The voltage of LED is adjusted, therefore can make the voltage of LED that need not maintain maximum value always, to reduce LED luminance condition
Power consumption both guarantee function to realize the balance between the duration of the power consumption and brightness change process when adjusting LED luminance
Consume it is not too big, also guarantee LED luminance change procedure duration will not be too long.
In specific embodiment, the object brightness of LED is related with the first brightness and the second brightness, the electricity of physical relationship and LED
Line structure is related, and there are certain functional relations, such as shown in following formula (1):
LAlways=h (L1,L2) ... ... formula (1)
In formula (1), L1For the first brightness, L2For the second brightness；LAlwaysFor object brightness；LAlwaysWith L1And L2Between letter
Number relationship is h (L1,L2)。
In specific implementation in above-mentioned formula (1) LAlwaysWith L1And L2Between function there are many, such as LAlwaysFor L1And L2The sum of
Etc..A kind of possible L in above-mentioned formula (1) is provided in the embodiment of the present inventionAlwaysWith L1And L2Between functional relation, such as
Shown in following formula (2):
In formula (2): L1For the first brightness；L2For the second brightness；LAlwaysFor object brightness；* it indicates to multiply.
In the embodiment of the present invention, it is alternatively possible to which L in above-mentioned formula (2) is arranged in circuit according to specific operating condition1
And L2Proportionate relationship, such as shown in following formula (3):
L1=kL2... ... formula (3)
In formula (3): k is proportionality coefficient, related with circuit structure, can be preset；L1For the first brightness；L2It is bright for second
Degree；LAlwaysFor object brightness.
In conjunction with above-mentioned formula, the workflow of LED luminance regulating device is described in detail below:
First obtain the object brightness of LED.The object brightness can be manually set, and certain condition can also be arranged in advance, according to
Condition automatically generates etc..Since LED will receive the joint effect of voltage and PWM duty cycle, it can be according to above-mentioned formula
(2) and formula (3) determines the first brightness L1With the second brightness L2.The voltage of LED is adjusted to first using voltage control method
The corresponding voltage of brightness.Use PWM duty cycle control method adjustment PWM duty cycle for the corresponding PWM duty of the second brightness simultaneously
Than.By certain duration, collective effect of the LED in the corresponding voltage of the first brightness and the corresponding PWM duty cycle of the second brightness
Under reach object brightness.
For example, for example object brightness is 400nit (nit), i.e., finally wishes that the brightness of LED reaches 400nit, root
It is 200nit according to the first brightness that above-mentioned formula (1) and formula (2) are determined, the second brightness is 800nit.For another example, first is bright
Spending the corresponding voltage of 200nit is 3mv (millivolt)；Second brightness is that the corresponding PWM duty cycle of 800nit is 80%.That is,
In the circuit of current LED, if the not regulating device of PWM, i.e. PWM duty cycle are 100%, at this time when the voltage of LED is
When 3mv, the brightness of LED is the first brightness 200nit.Similarly, it in the circuit of current LED, is filled if being adjusted without voltage
It sets, i.e., the voltage of LED maintains always maximum value, such as 5mv, and at this time when the duty ratio of LED, the brightness of LED is second bright
Degree is 800nit.It is adjusted to 3mv in current LED circuit, while by the voltage of LED, the PWM duty cycle of LED is adjusted
It is 80%, under the influence of LED is while voltage and PWM duty cycle at this time, the brightness of LED reaches 400nit.
In the embodiment of the present invention, when the present intensity of object brightness and LED is inconsistent, there are two kinds of situations:
Situation one, when object brightness is greater than the present intensity of LED, the first brightness is less than object brightness, and object brightness is small
In the second brightness.That is, needing to adjust the present intensity of LED when the object brightness of acquisition is greater than the present intensity of LED
Be allowed to be increased to object brightness, by adjusting LED voltage to the corresponding voltage of the first brightness, while adjusting the PWM duty of LED
Than to the corresponding PWM duty cycle of the second brightness, so that the brightness of LED is corresponding in the corresponding voltage of the first brightness and the second brightness
Reach object brightness under the collective effect of PWM duty cycle.Due to using the brightness change duration of voltage control method LED longer,
Therefore the first brightness is made to be less than object brightness, to shorten the brightness change duration of LED under voltage control method.Again due to using
The brightness change duration of PWM duty cycle control method LED is shorter, therefore the second brightness can be made to be greater than object brightness, in this way, can
To promote the time that LED luminance is changed to object brightness.
Fig. 2 a illustrates brightness and the time history of a kind of LED, as shown in Figure 2 a, by the brightness of LED
From present intensity L0It is increased to object brightness LAlways。
As shown in Figure 2 a, curve S2101 is indicated: in the case that PWM duty cycle is 100%, the voltage of LED being adjusted to first
Brightness L1Time T is being passed through in the brightness of the brightness change situation of corresponding voltage LED, LED shown in curve S21012It reaches later
Reach brightness L to stable state1.That is, the brightness of LED, which reaches stable state, refers to growth with the time, curve
Brightness represented by S2301 will not change again.
As shown in Figure 2 a, curve S2102 is indicated: the voltage of LED is adjusted to the second brightness in maximum value, by PWM duty cycle
L2Time T is being passed through in the brightness of the brightness change situation of the LED of corresponding PWM duty cycle, LED shown in curve S21021It
After reach stable state and reach brightness L2。
As shown in Figure 2 a, curve S2103 is indicated: the voltage of LED is adjusted to the first brightness L from current voltage1Corresponding electricity
Pressure, the PWM duty cycle of LED are adjusted to the second brightness L2The brightness change situation of the LED of corresponding PWM duty cycle, in curve S2103
Shown in LED brightness pass through time T2Reach stable state later and reaches luma target brightness LAlways。
It can be seen that under the co- controlling of voltage and PWM duty cycle by Fig. 2 a, LED passes through time T2It can reach
Object brightness.But it if using voltage control method merely, needs to make LED from present intensity L by voltage control method0
It is increased to object brightness LAlways, and it is that the first brightness is corresponding that the voltage of LED, which only needs to increase from current voltage, in the embodiment of the present invention
Voltage, and the corresponding voltage of the first brightness be less than object brightness, therefore, in the embodiment of the present invention LED voltage adjustment
Duration is necessarily smaller than the voltage adjustment duration of LED when using voltage-controlled method merely in the prior art, it is seen then that the present invention
Method provided by embodiment shortens the duration that LED luminance is changed to object brightness.
Further, if can be seen that merely by Fig. 2 a using PWM duty cycle control method, need to keep LED's
Voltage maintains always maximum value, and power consumption is larger during the brightness regulation of LED under this kind of mode, still, the embodiment of the present invention
In, while adjusting PWM duty cycle, also having adjusted the voltage of LED, i.e. the voltage of LED will not maintain always maximum value,
The voltage of LED maintains at the corresponding voltage of the first brightness, and the voltage of LED is smaller, and the power consumption of LED is smaller.Therefore this hair
Method provided by bright embodiment is controlled using PWM duty cycle merely compared to the prior art during the brightness regulation of LED
Method reduces power consumption.
Situation two, when object brightness is less than the present intensity of LED, the first brightness is greater than object brightness, and object brightness is big
In the second brightness.That is, needing to adjust the present intensity of LED when the object brightness of acquisition is less than the present intensity of LED
Be allowed to be reduced to object brightness, by adjusting LED voltage to the corresponding voltage of the first brightness, while adjusting the PWM duty of LED
Than to the corresponding PWM duty cycle of the second brightness, so that the brightness of LED is corresponding in the corresponding voltage of the first brightness and the second brightness
Object brightness is reduced under the collective effect of PWM duty cycle.Due to use the brightness change duration of voltage control method LED compared with
It is long, therefore the first brightness is made to be greater than object brightness, to shorten the brightness change duration of LED under voltage control method.And due to
Brightness change duration using PWM duty cycle control method LED is shorter, therefore object brightness can be made to be greater than the second brightness, such as
This, can promote the time that LED luminance is changed to object brightness.
Under the co- controlling of voltage and PWM duty cycle, LED can be reduced to object brightness by certain time.But
If using voltage control method merely, need to make LED be reduced to object brightness from present intensity by voltage control method,
And the voltage of LED only needs to be reduced to the corresponding voltage of the first brightness from current voltage in the embodiment of the present invention, and first
The corresponding voltage of brightness is greater than object brightness, and therefore, the voltage adjustment duration of LED is necessarily smaller than existing skill in the embodiment of the present invention
The voltage of LED when voltage-controlled method is used to adjust duration merely in art, it is seen then that method provided by the embodiment of the present invention
Shorten the duration that LED luminance is changed to object brightness.
Further, if using PWM duty cycle control method merely, need to keep the voltage of LED to maintain always most
Big to be worth, power consumption is larger during the brightness regulation of LED under this kind of mode, still, in the embodiment of the present invention, is adjusting PWM duty
Than while, also have adjusted the voltage of LED, i.e. the voltage of LED will not maintain always maximum value, and the voltage of LED maintains
At the corresponding voltage of one brightness, the voltage of LED is smaller, and the power consumption of LED is smaller.Therefore side provided by the embodiment of the present invention
Method uses merely PWM duty cycle control method compared to the prior art, reduces power consumption during the brightness regulation of LED.
Optionally, the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness, comprising: determine third brightness；
And the duty ratio of LED is adjusted to the corresponding PWM duty cycle of third brightness, and maintain preset target duration；By default
Target duration when, the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness.
Optionally, when object brightness is greater than the present intensity of LED, third brightness is greater than the second brightness.For example, by LED's
Brightness is adjusted from 200nit to 400nit, sets the second brightness as 420nit, then third brightness is greater than 420nit.
In the embodiment of the present invention, by the brightness of LED from present intensity L0It is reduced to object brightness LAlways, Fig. 2 b illustrates
A kind of curve graph that optionally LED luminance is adjusted, as shown in Figure 2 b:
As shown in Figure 2 b, curve S2201 is indicated: in the case that PWM duty cycle is 100%, the voltage of LED being adjusted to first
Brightness L1Time T is being passed through in the brightness of the brightness change situation of corresponding voltage LED, LED shown in curve S22014It reaches later
Reach brightness L to stable state1。
As shown in Figure 2 b, curve S2202 is indicated: the voltage of LED is first adjusted in maximum value, by PWM duty cycle to third
Brightness L3Corresponding PWM duty cycle PWM1, pass through time T later3, then PWM duty cycle is adjusted to the second brightness L2It is corresponding
PWM duty cycle PWM2LED brightness change situation.Third brightness is less than the second brightness, therefore third brightness L3Corresponding PWM
Duty ratio PWM1Less than the second brightness L2Corresponding PWM duty cycle PWM2。
As shown in Figure 2 b, curve 2203 indicates: the voltage of LED is adjusted to the first brightness L from current voltage1Corresponding electricity
Pressure, the PWM duty cycle of LED are first adjusted to third brightness L3Corresponding PWM duty cycle PWM1, adjusted later to the second brightness L2It is right
The PWM duty cycle PWM answered2LED brightness change situation, the brightness of LED shown in curve S2103 passing through time T3It
After reach stable state and reach luma target brightness LAlways.By after moment T3, LED's under the voltage control of LED is bright
Degree is still within downward trend, but the PWM duty cycle of LED is the corresponding PWM duty cycle of the second brightness, in the PWM duty cycle
Control under the brightness of LED be in ascendant trend, therefore under the control of the voltage of LED and under the control of PWM duty cycle,
In time T3Later, the brightness of LED maintains object brightness.
It can be seen that the control method by PWM duty cycle, adjustment PWM duty cycle to third brightness L from Fig. 2 b3It is right
The PWM duty cycle PWM answered1, while adjusting voltage is the first brightness L1Corresponding voltage, LED is in third brightness L3Corresponding PWM
Duty ratio PWM1With the first brightness L1Under the collective effect of corresponding voltage, LED is from present intensity L0It can be reduced rapidly to target
Brightness LAlways.A length of preset target duration when used.Due to first adjusting PWM duty cycle to smaller value, accounted at this time in PWM
Under the influence of sky ratio, the brightness of LED can decline rapidly.It can be seen that the program, which further shortens LED luminance, is changed to object brightness
Duration.
Optionally, when object brightness is less than the present intensity of LED, third brightness is less than the second brightness.Such as by the bright of LED
Degree is adjusted from 500nit to 450nit, sets the second brightness as 420nit, then third brightness is less than 420nit.
In the embodiment of the present invention, by the brightness of LED from present intensity L0It is increased to object brightness LAlways, Fig. 2 c illustrates
A kind of curve graph that optionally LED luminance is adjusted, as shown in Figure 2 c:
As shown in Figure 2 c, curve S2301 is indicated: in the case that PWM duty cycle is 100%, the voltage of LED being adjusted to first
Brightness L1Time T is being passed through in the brightness of the brightness change situation of corresponding voltage LED, LED shown in curve S23014It reaches later
Reach brightness L to stable state1。
As shown in Figure 2 c, curve S2302 is indicated: the voltage of LED is first adjusted in maximum value, by PWM duty cycle to third
Brightness L3Corresponding PWM duty cycle PWM1, pass through time T later3, then PWM duty cycle is adjusted to the second brightness L2It is corresponding
PWM duty cycle PWM2LED brightness change situation.Third brightness is greater than the second brightness, therefore third brightness L3Corresponding PWM
Duty ratio PWM1Greater than the second brightness L2Corresponding PWM duty cycle PWM2。
As shown in Figure 2 c, curve 2303 indicates: the voltage of LED is adjusted to the first brightness L from current voltage1Corresponding electricity
Pressure, the PWM duty cycle of LED are first adjusted to third brightness L3Corresponding PWM duty cycle PWM1, adjusted later to the second brightness L2It is right
The PWM duty cycle PWM answered2LED brightness change situation, the brightness of LED shown in curve S2103 passing through time T3It
After reach stable state and reach luma target brightness LAlways.By after moment T3, LED's under the voltage control of LED is bright
Degree is still within ascendant trend, but the PWM duty cycle of LED is the corresponding PWM duty cycle of the second brightness, in the PWM duty cycle
Control under the brightness of LED be in downward trend, therefore under the control of the voltage of LED and under the control of PWM duty cycle,
In time T3Later, the brightness of LED maintains object brightness.
It can be seen that the control method by PWM duty cycle, adjustment PWM duty cycle to third brightness L from Fig. 2 c3It is right
The PWM duty cycle PWM answered1, while adjusting voltage is the first brightness L1Corresponding voltage, LED is in third brightness L3Corresponding PWM
Duty ratio PWM1With the first brightness L1Under the collective effect of corresponding voltage, LED is from present intensity L0Target can be quickly increased to
Brightness LAlways.A length of preset target duration when used.Due to first adjusting PWM duty cycle to the larger value, accounted at this time in PWM
Under the influence of sky ratio, the brightness of LED can be promoted rapidly.From the point of view of attached drawing, compared in Fig. 2 a, the brightness of LED is from working as in Fig. 2 c
Preceding brightness L0It is increased to object brightness LAlwaysDuration be less than the brightness of LED in Fig. 2 a from present intensity L0It is increased to object brightness LAlways
Duration, it is seen that the program further shortens the duration that LED luminance is changed to object brightness.
Optionally, as shown in Figure 2 c, by time T3When, if be no longer adjusted to PWM duty cycle, i.e. maintenance LED
PWM duty cycle be the corresponding duty ratio of third brightness, then brightness represented by curve S2302 is in time T3When still maintain
In third brightness, that is to say, that LED passes through time T in PWM duty cycle duty ratio corresponding for third brightness3Stabilization is reached
Brightness.
For example, the brightness for adjusting LED is increased to 400nit from 0, and third brightness is 500nit, and the second brightness is
420nit, when PWM duty cycle passes through 4ms for 70%, LED luminance reaches third brightness 500nit.So first adjust PWM duty cycle
To 70%, a length of 4ms, brightness reach 500nit when passing through, if still keeping PWM duty is 70% constant, the brightness of LED
As the extension of time will not change, 500nit is maintained.
Optionally, in the embodiment of the present invention, the duty ratio of LED is adjusted to the corresponding PWM duty cycle of third brightness, and tie up
Hold preset target duration；When by preset target duration, the duty ratio of LED is adjusted to the corresponding PWM of the second brightness
Duty ratio.And the brightness of LED reaches object brightness after by target duration.Optionally, target duration meets the following conditions:
The voltage of LED is adjusted to the corresponding voltage of the first brightness, while it is corresponding that the duty ratio of LED is adjusted to institute's third brightness
PWM duty cycle, and when maintaining target duration: LED luminance reaches object brightness.
Combination Fig. 2 c of the embodiment of the present invention is illustrated target duration, as shown in Figure 2 c: when target in a length of Fig. 2 c from
Time 0 starts to time T3The duration of cut-off, the condition that target duration meets are as follows: the voltage for adjusting LED is corresponding to the first brightness
Voltage while, start adjust PWM duty cycle to the corresponding PWM duty cycle of third brightness, by target duration, PWM duty
Brightness more corresponding than adjusting method reaches third brightness L shown in curve S23023, the brightness of LED reaches object brightness at this time
LAlways.That is, adjusting LED from present intensity L using voltage control method and duty ratio control method simultaneously0To object brightness
LAlwaysRequired duration is target duration, continues to extend duration at this time, the brightness of LED is continually maintained in object brightness.This hair
The method for the adjustings LED luminance that bright embodiment provides, compared with the existing technology in merely using voltage-controlled method, shorten
LED luminance is changed to the duration of object brightness, and compared with the existing technology in merely use PWM duty cycle control method, reduce
Power consumption.
Optionally, target duration is less than: after the voltage of LED is adjusted to the corresponding voltage of the first brightness, LED is bright first
It spends under corresponding voltage and reaches the duration of stable state.For Fig. 2 c, the time 0 in when target a length of Fig. 2 c start to when
Between T3The duration of cut-off, after the voltage of LED is adjusted to the corresponding voltage of the first brightness, LED is in the corresponding voltage of the first brightness
Under reach stable state when a length of time 0 in Fig. 2 c start to time T4The duration of cut-off.As it can be seen that the time 0 starts extremely
Time T3The duration of cut-off is greater than the beginning of time 0 to time T4The duration of cut-off.Since target duration is less than the voltage tune of LED
Whole is the duration that LED reaches stable state under the corresponding voltage of the first brightness after the corresponding voltage of the first brightness, therefore, into one
Step improves the brightness change duration of LED, and then has saved the time.
Optionally, target duration is equal to: the voltage of LED being adjusted to the corresponding voltage of the first brightness and reaches stable state
Duration half.For Fig. 2 c, the time 0 in when target a length of Fig. 2 c starts to time T3The duration of cut-off, by LED
Voltage be adjusted to the corresponding voltage of the first brightness after, LED reaches the duration of stable state under the corresponding voltage of the first brightness
To start for the time 0 in Fig. 2 c to time T4The duration of cut-off.Optionally, the time 0 starts to time T3Cut-off when it is a length of when
Between 0 start to time T4The half of the duration of cut-off.And due to when by target duration, by PWM duty cycle from third brightness
Corresponding PWM duty cycle is adjusted to the corresponding PWM duty cycle of the second brightness, and therefore, on the one hand this kind of scheme improves the bright of LED
Degree variation duration, and then saved the time；On the other hand, be more reasonably assigned with the corresponding PWM duty cycle of third brightness and
The time of the corresponding PWM duty cycle of second brightness distributes.In this kind of scheme, third brightness can be described as overcharging a little.
Advantage of the analysis embodiment of the present invention in terms of energy consumption in detail below.
In specific embodiment, during the brightness for adjusting LED, the brightness of LED and the ratio of power reflect shining for LED
Efficiency, luminous efficiency is smaller to illustrate that LED is more energy efficient, and brightness L, power P and the luminous efficiency η three of LED meets certain relationship,
As shown in following formula (4):
Above-mentioned formula (4) illustrates that under identical brightness case, the smaller LED of power is more energy efficient.
Because of the characteristic of LED light source component, in the case of the brightness to identical object brightness for adjusting multiple LED, voltage control
Power corresponding to LED can be lower than power corresponding to PWM duty cycle control method LED under method processed, so adjusting multiple LED
Brightness to identical object brightness when, voltage control method is higher than the luminous efficiency of PWM duty cycle control method, that is,
It says, voltage control method is more more energy efficient than PWM duty cycle control method.
Fig. 2 d illustrates brightness and the power relation schematic diagram of a kind of LED provided in an embodiment of the present invention.Such as figure
Shown in 2d, by LED luminance from L0Adjust L1Process three curves: curve S2401, curve S2402, curve S2403,
In, L1Greater than L0。
As shown in Figure 2 d, curve S2401 is indicated: in the case that PWM duty cycle is 100%, the voltage of LED is only adjusted,
So that LED luminance is from L0Adjust L1, power increases with the raising of brightness.In this kind of scheme, brightness and power exist centainly
Functional relation, such as shown in following formula (5):
L1=f (P1)*g(Pmax) ... ... formula (5)
Wherein, L1For the brightness of LED；P1For L1The power of corresponding LED；PmaxFor LED rated power；L1And P1Between
Functional relation is f (P1)；L1And PmaxBetween functional relation be g (Pmax)。
Curve S2402 is indicated: for the voltage of LED in maximum value, the PWM duty cycle for adjusting LED makes LED luminance from L0It adjusts
Save L2, power increases with the raising of brightness.In this kind of scheme, shown in for example following formula (6) of the relationship of brightness and power:
L2=f (Pmax)*g(P2) ... ... formula (6)；
Wherein, L2The brightness of LED；P2For L2The power of corresponding LED；PmaxFor LED rated power；L2And PmaxBetween
Functional relation is f (Pmax)；L2And P2Between functional relation be g (P2)。
Curve S2403 is indicated: while the voltage and PWM duty cycle of LED is adjusted, so that LED luminance is from L0Adjust LAlways, bright
The relationship of degree and power meets formula (2)；By L in formula (5) and formula (6)1And L2It substitutes into formula (2), formula (7) can be obtained:
L in multiple LED under identical brightness case, i.e., in formula (5)1, L in formula (6)2In formula (7)
LAlwaysWhen all the same, power P1Less than PAlways, PAlwaysLess than P2, according to formula (4) it is found that luminous efficiency meets following equation (8):
η2≤ηAlways≤η1... ... formula (8)
In formula (8), η1Under conditions of being 100% for PWM duty cycle in the prior art, individually using adjustment voltage method
Corresponding luminous efficiency, η when LED being made to reach object brightness2To maintain the voltage of LED to be in the feelings of maximum value in the prior art
Under condition, corresponding luminous efficiency, η when individually so that LED is reached object brightness using adjustment PWM duty cycle methodAlwaysIt is of the invention real
Apply in example at the same using and meanwhile adjust voltage and when PWM duty cycle method makes LED reach object brightness corresponding luminous efficiency.It is logical
Cross formula (8) and above-mentioned analysis, it is clear that the embodiment of the present invention compared with the existing technology in merely by adjusting
The mode of PWM duty cycle adjusts the mode of the brightness of LED, saves energy consumption.
Can be seen that from the discussion above in the embodiment of the present invention due to using and meanwhile the method that adjusts voltage and duty ratio, one
Aspect, the brightness for adjusting LED reach the time required for object brightness less than the time required for adjustment voltage is individually used, make
It is rapider that LED luminance reacting condition must be adjusted；On the other hand, the power dissipation ratio that this method adjusts LED luminance, which individually uses, to be accounted for
The power consumption that empty ratio method is adjusted is smaller；The method of the invention realizes the power consumption when adjusting LED luminance and brightness change processes
Balance between duration had both guaranteed that power consumption was not too big, also guaranteed that the duration of LED luminance change procedure will not be too long.
Fig. 3 illustrates a kind of structural schematic diagram of LED luminance regulating device provided in an embodiment of the present invention.
Based on same idea, a kind of LED luminance regulating device provided in an embodiment of the present invention, as shown in figure 3, the device
300 include acquiring unit 301, determination unit 302 and adjustment unit 303；Wherein:
Acquiring unit 301, for obtaining the object brightness of LED；
Determination unit 302, for when the present intensity for determining object brightness and LED is inconsistent, according to object brightness, really
Make the first brightness and the second brightness；
Adjustment unit 303, for the voltage of LED to be adjusted to the corresponding voltage of the first brightness, and by the duty ratio tune of LED
Whole is the corresponding PWM duty cycle of the second brightness, so that the brightness of LED is corresponding in the corresponding voltage of the first brightness and the second brightness
Reach object brightness under the action of PWM duty cycle.
Optionally, when object brightness is greater than the present intensity of LED, the first brightness is less than object brightness, and object brightness is small
In the second brightness；
When object brightness is less than the present intensity of LED, the first brightness is greater than object brightness, and object brightness is bright greater than second
Degree.
Optionally it is determined that unit 302, is also used to:
Determine third brightness；Wherein, when object brightness is greater than the present intensity of LED, third brightness is greater than the second brightness；Mesh
When marking present intensity of the brightness less than LED, third brightness is less than the second brightness；
Adjustment unit 303 is used for when the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness:
The duty ratio of LED is adjusted to the corresponding PWM duty cycle of third brightness, and maintains preset target duration；
When by preset target duration, the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness.
Optionally, target duration meets the following conditions:
The voltage of LED is adjusted to the corresponding voltage of the first brightness, while the duty ratio of LED is adjusted to institute's third brightness
Corresponding PWM duty cycle, and when maintaining target duration:
LED luminance reaches object brightness.
Optionally, target duration is less than: after the voltage of LED is adjusted to the corresponding voltage of the first brightness, LED is bright first
It spends under corresponding voltage and reaches the duration of stable state；Or
Target duration is equal to: after the voltage of LED is adjusted to the corresponding voltage of the first brightness, LED is corresponding in the first brightness
Voltage under reach stable state duration half.
It can be seen that the object brightness that LED is obtained in the embodiment of the present invention from the discussion above；Determining object brightness and LED
Present intensity it is inconsistent when, according to object brightness, determine the first brightness and the second brightness；The voltage of LED is adjusted to
The corresponding voltage of one brightness, and the duty ratio of LED is adjusted to the corresponding PWM duty cycle of the second brightness, so that the brightness of LED exists
Reach object brightness under the action of the corresponding voltage of first brightness and the corresponding PWM duty cycle of the second brightness.Due to using simultaneously
Adjust voltage and duty ratio method, on the one hand, adjust LED brightness reach the time required for object brightness be less than individually adopt
The time required for adjustment voltage, so that it is rapider to adjust LED luminance reacting condition；On the other hand, this method is adjusted
The power consumption that the power dissipation ratio of LED luminance individually uses duty ratio method to adjust is smaller；The method of the invention realizes bright in adjusting LED
Balance when spending between power consumption and the duration of brightness change process had both guaranteed that power consumption was not too big, and had also guaranteed that LED luminance changed
The duration of journey will not be too long.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the present invention
Form.It is deposited moreover, the present invention can be used to can be used in the computer that one or more wherein includes computer usable program code
The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from model of the invention by those skilled in the art
It encloses.In this way, if these modifications and changes of the present invention is within the scope of the claims of the present invention and its equivalent technology, then
The present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of Light-emitting diode LED brightness adjusting method characterized by comprising
Obtain the object brightness of LED；
When the present intensity for determining the object brightness and the LED is inconsistent, according to the object brightness, first is determined
Brightness and the second brightness；The object brightness is between first brightness and second brightness；
The voltage of the LED is adjusted to the corresponding voltage of first brightness, and the duty ratio of the LED is adjusted to described
The corresponding PWM duty cycle of second brightness, so that the brightness of the LED is in the corresponding voltage of first brightness and described second bright
Reach the object brightness under acting on while spending corresponding PWM duty cycle.
2. the method as described in claim 1, which is characterized in that when the object brightness is greater than the present intensity of the LED, institute
The first brightness is stated less than the object brightness, and the object brightness is less than second brightness；
When the object brightness is less than the present intensity of the LED, first brightness is greater than the object brightness, and the mesh
It marks brightness and is greater than second brightness.
3. the method as described in claim 1, which is characterized in that it is bright that the duty ratio by the LED is adjusted to described second
Spend corresponding PWM duty cycle, comprising:
Determine third brightness；Wherein, when the object brightness is greater than the present intensity of the LED, the third brightness is greater than institute
State the second brightness；When the object brightness is less than the present intensity of the LED, the third brightness is less than second brightness；
The duty ratio of the LED is adjusted to the corresponding PWM duty cycle of the third brightness, and maintains preset target duration；
When by preset target duration, the duty ratio of the LED is adjusted to the corresponding PWM duty of second brightness
Than.
4. method as claimed in claim 3, which is characterized in that the target duration meets the following conditions:
The voltage of the LED is adjusted to the corresponding voltage of first brightness, while the duty ratio of the LED is adjusted to institute
The corresponding PWM duty cycle of third brightness, and when maintaining the target duration:
The LED luminance reaches the object brightness.
5. method as claimed in claim 3, which is characterized in that the target duration is less than: the voltage of the LED is adjusted to
After the corresponding voltage of first brightness, the LED reaches the duration of stable state under the corresponding voltage of the first brightness；Or
The target duration is equal to: after the voltage of the LED is adjusted to the corresponding voltage of first brightness, the LED exists
Reach the half of the duration of stable state under the corresponding voltage of first brightness.
6. a kind of Light-emitting diode LED brightness regulating apparatus characterized by comprising
Acquiring unit, for obtaining the object brightness of LED；
Determination unit, it is bright according to the target for when the present intensity for determining the object brightness and the LED is inconsistent
Degree, determines the first brightness and the second brightness；The object brightness is between first brightness and second brightness；
Adjustment unit, for the voltage of the LED to be adjusted to the corresponding voltage of first brightness, and accounting for the LED
Sky is than being adjusted to the corresponding PWM duty cycle of second brightness, so that the brightness of the LED is in the corresponding electricity of first brightness
It presses and reaches the object brightness under effect while PWM duty cycle corresponding with second brightness.
7. device as claimed in claim 6, which is characterized in that when the object brightness is greater than the present intensity of the LED, institute
The first brightness is stated less than the object brightness, and the object brightness is less than second brightness；
When the object brightness is less than the present intensity of the LED, first brightness is greater than the object brightness, and the mesh
It marks brightness and is greater than second brightness.
8. device as claimed in claim 6, which is characterized in that the determination unit is also used to:
Determine third brightness；Wherein, when the object brightness is greater than the present intensity of the LED, the third brightness is greater than institute
State the second brightness；When the object brightness is less than the present intensity of the LED, the third brightness is less than second brightness；
The adjustment unit is used for when the duty ratio of the LED is adjusted to the corresponding PWM duty cycle of second brightness:
The duty ratio of the LED is adjusted to the corresponding PWM duty cycle of the third brightness, and maintains preset target duration；
When by preset target duration, the duty ratio of the LED is adjusted to the corresponding PWM duty of second brightness
Than.
9. device as claimed in claim 8, which is characterized in that the target duration meets the following conditions:
The voltage of the LED is adjusted to the corresponding voltage of first brightness, while the duty ratio of the LED is adjusted to institute
The corresponding PWM duty cycle of third brightness, and when maintaining the target duration:
The LED luminance reaches the object brightness.
10. device as claimed in claim 8, which is characterized in that the target duration is less than: the voltage of the LED is adjusted
After the corresponding voltage of first brightness, the LED reaches the duration of stable state under the corresponding voltage of the first brightness；Or
Person
The target duration is equal to: after the voltage of the LED is adjusted to the corresponding voltage of first brightness, the LED exists
Reach the half of the duration of stable state under the corresponding voltage of first brightness.
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| CN109445014B (en) * | 2018-12-26 | 2020-06-23 | 联想(北京)有限公司 | Backlight module, electronic equipment and information processing method |
| CN110570821A (en) * | 2019-09-18 | 2019-12-13 | 广东晟合技术有限公司 | OLED optical compensation method, compensation device and display driving chip |
| CN112289271B (en) * | 2020-10-29 | 2022-02-11 | 海信视像科技股份有限公司 | Display device and dimming mode switching method |
| CN112601330B (en) * | 2020-12-24 | 2022-08-23 | 东莞锐视光电科技有限公司 | Linear adjustment method and system for light source brightness |
| CN114126146B (en) * | 2022-01-27 | 2022-05-06 | 北京理工大学 | High-frequency high-power numerical control square wave signal generating system for adjusting LED |
| CN115376440A (en) * | 2022-07-29 | 2022-11-22 | 西安诺瓦星云科技股份有限公司 | Display screen brightness uniformity correction method and device and display equipment |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co., Ltd Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE ELECTRIC Co.,Ltd. |