CN111083834A - LED calibration method, device, equipment and system - Google Patents
LED calibration method, device, equipment and system Download PDFInfo
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Abstract
The application provides an LED calibration method, which comprises the following steps: acquiring the brightness value of each single-color LED when being simultaneously lightened under the corresponding initial current value; judging whether the brightness value passes the brightness check; if the brightness check is not passed, determining a calibration brightness current value based on the initial current value, the brightness value and a target brightness value corresponding to the initial current value, so that the brightness value obtained according to the calibration brightness current value passes the brightness check. Therefore, the LED calibration method is simple, the brightness can be accurately calibrated to the brightness required by a user, and the accuracy of optical display can be improved. The application also provides an LED calibration device, an LED calibration device and an LED calibration system, and the LED calibration device, the LED calibration device and the LED calibration system all have the beneficial effects.
Description
Technical Field
The present disclosure relates to the field of optical calibration technologies, and in particular, to an LED calibration method, an LED calibration device, an LED calibration apparatus, and an LED calibration system.
Background
In recent years, wearing products such as bracelets and earphones are popular, especially, new vitality is injected into the wearing products due to the fact that TWS earphones are appeared, RGB LEDs are widely used for displaying states of the wearable products, and due to the fact that the consistency of optical performance of the LED products cannot be guaranteed through the existing production process and the product structural design, the LED display effects of different products are inconsistent under the same LEDUI design condition, and therefore the problem that the accuracy of the optical performance of LED display is low is caused.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide an LED calibration method, an LED calibration device, LED calibration equipment and an LED calibration system, which can improve the accuracy of optical display. The specific scheme is as follows:
the application discloses a method for calibrating an LED, which comprises the following steps:
acquiring the brightness value of each single-color LED when being simultaneously lightened under the corresponding initial current value;
judging whether the brightness value passes the brightness check;
if not, determining a calibration brightness current value based on the initial current value, the brightness value and a target brightness value corresponding to the initial current value, so that the brightness value obtained according to the calibration brightness current value passes through the brightness check.
Optionally, the determining a calibration luminance current value based on the initial current value, the luminance value, and a target luminance value corresponding to the initial current value includes:
determining a first calibration current value for each of the single color LEDs using a first algorithm based on the initial current value, the brightness value, and the target brightness value;
updating the initial current value by using the first calibration current value, and executing the step of obtaining the brightness value of each single-color LED when the single-color LEDs are simultaneously lighted at the corresponding initial current value until the obtained calibrated brightness value corresponding to the calibrated brightness current value passes through brightness check; wherein the first algorithm is
Optionally, before the updating the initial current value by using the first calibration current value and the obtaining of the brightness value of each single-color LED when the single-color LEDs are simultaneously turned on at the corresponding initial current value, the method further includes:
judging whether the first calibration current value exceeds a preset current threshold value or not;
if not, the step of updating the initial current value by using the first calibration current value is executed.
Optionally, the determining a calibration luminance current value based on the initial current value, the luminance value, and a target luminance value corresponding to the initial current value, so that a luminance value obtained after calibration according to the calibration luminance current value passes through the luminance verification, further includes:
acquiring the color ratio of each single-color LED when being simultaneously lightened under the calibration brightness current value;
judging whether the color ratio passes color verification;
if not, obtaining a calibration color current value based on the calibration brightness current value and the brightness ratio so as to enable the color ratio obtained after calibration according to the calibration color current value to pass through the color verification, wherein the brightness ratio is the slope ratio of any two LED brightness response curves;
and if so, taking the calibration brightness current value as the calibration color current value.
Optionally, the determining whether the color ratio passes through color verification includes:
and judging whether the color ratio is in a target color ratio range.
Optionally, if not, obtaining a calibration color current value based on the calibration luminance current value and the luminance ratio includes:
if not, determining a second calibration current value for each of the single-color LEDs using a second algorithm based on the calibration luminance current value and the luminance ratio to update the calibration luminance current value using the second calibration current value;
executing the step of obtaining the color ratio of each single-color LED when being simultaneously lightened under the calibration brightness current value until the calibration color current value is obtained;
when the color ratio is smaller than the first color threshold, the corresponding second algorithm is:
A1＝A1'+1,A2＝A2'-Ratio；
when the color ratio is greater than a second color threshold, the corresponding second algorithm is:
A1＝A1'-1,A2＝A2'+Ratio；
wherein A is1、A2Respectively representing a second calibration current value of the first LED, a second calibration current value of the second LED, A1’、A2' represents a calibration luminance current value of a first LED and a calibration luminance current value of a second LED, respectively, and Ratio represents a luminance Ratio, and the first color threshold value and the second color threshold value are a lower threshold value and an upper threshold value of the target color Ratio range, respectively.
Optionally, after determining the second calibration current value of each of the single-color LEDs by using the second algorithm based on the calibration luminance current value and the luminance ratio to update the calibration luminance current value by using the second calibration current value, the method further includes:
judging whether the second calibration current value exceeds a preset current threshold value or not;
and if not, executing the step of obtaining the color ratio of each single-color LED when being simultaneously lightened under the calibration brightness current value.
The application discloses LED calibrating device includes:
the brightness value acquisition module is used for acquiring the brightness value of each single-color LED when the single-color LEDs are simultaneously lightened under the corresponding initial current value;
the first judgment module is used for judging whether the brightness value passes the brightness check;
and the calibration brightness current value determining module is used for determining a calibration brightness current value based on the initial current value, the brightness value and a target brightness value corresponding to the initial current value if the brightness check is not passed, so that the brightness value obtained according to the calibration brightness current value after calibration passes the brightness check.
The application discloses LED calibration equipment includes:
a memory for storing a computer program;
a processor for implementing the steps of the above-described LED calibration method when executing said computer program.
The application discloses LED calibration system includes:
an LED calibration device as described above;
a wearable device comprising a number of single color LEDs;
and the signal acquisition equipment is used for acquiring the brightness value of each single-color LED of the wearable equipment when the single-color LED is simultaneously lightened at the corresponding initial current value.
The application provides an LED calibration method, which comprises the following steps: acquiring the brightness value of each single-color LED when being simultaneously lightened under the corresponding initial current value; judging whether the brightness value passes the brightness check; if not, determining a calibration brightness current value based on the initial current value, the brightness value and a target brightness value corresponding to the initial current value, so that the brightness value obtained according to the calibration brightness current value passes through brightness verification.
Therefore, according to the mixed brightness value corresponding to the single-color LED which is simultaneously lightened at the initial current value, when the brightness passes the brightness check, the calibration brightness current value is determined according to the initial current value, the brightness value and the target brightness value, so that the brightness check is realized by obtaining the calibrated brightness value according to the calibration current value. This application still provides LED calibrating device, LED calibration equipment and LED calibration system simultaneously, all has above-mentioned beneficial effect, and it is no longer repeated here.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of an LED calibration method according to an embodiment of the present disclosure;
fig. 2 is a schematic flowchart illustrating a process of calibrating a luminance current value according to an embodiment of the present disclosure;
FIG. 3 is a flow chart of another LED calibration method provided by the embodiments of the present application;
FIG. 4 is a schematic diagram illustrating a process of determining a calibration color current value according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an LED calibration apparatus according to an embodiment of the present disclosure;
fig. 6 is a structural diagram of an LED calibration apparatus according to an embodiment of the present disclosure;
FIG. 7 is a block diagram of another LED calibration apparatus provided in the embodiments of the present application;
FIG. 8 is a schematic structural diagram of an LED calibration system according to the present embodiment;
fig. 9 is a schematic structural diagram of a wearable device provided in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Because the consistency of the optical performance of the LED products cannot be ensured by the current production process, the LED display effect of different products is inconsistent under the same LEDUI design condition, and the problem of low accuracy of the optical performance of LED display is caused. Based on the foregoing technical problem, this embodiment provides an LED calibration method, where according to a mixed brightness value corresponding to a single-sided LED that is simultaneously lit at an initial current value, when the brightness passes a brightness check, a calibrated brightness current value is determined according to the initial current value, the brightness value, and a target brightness value, so as to obtain a calibrated brightness value according to the calibrated current value to implement the brightness check. The method is simple and can accurately improve the optical display effect, specifically please refer to fig. 1, where fig. 1 is a flowchart of an LED calibration method provided in an embodiment of the present application, and specifically includes:
and S110, acquiring the brightness value of each single-color LED when the single-color LEDs are simultaneously lighted under the corresponding initial current value.
The purpose of this step is to obtain the brightness value obtained when each monochromatic lamp is simultaneously lighted at the corresponding initial current value. The single color LEDs may be LEDs corresponding to three primary colors. Wherein, monochromatic LED usually indicates wearable product warning light, for example is located intelligent wrist-watch display screen top for show the electric quantity or be used for the LED of warning suggestion.
Further, before step S110, the method further includes: and establishing a corresponding relation between the current value and the brightness value of each single-color LED. And obtaining the corresponding brightness value of each single-color LED under different current values.
In an implementable embodiment, when the color of the LED calibration is a single color, an initial brightness value corresponding to the single color LED is determined based on a target brightness value corresponding to the single color, such that the brightness value corresponding to the initial current value of each single color LED is the target brightness value. For example, when the single color is red, green, or blue, the single color LED corresponding to the color is lit up based on the initial current value at this time, and the luminance value at the time of simultaneous lighting is acquired, it is understood that the theoretical luminance value corresponding to the initial current value is the target luminance value.
In another realizable embodiment, when the LED calibrated color is a mixed color, an initial brightness value corresponding to each single color LED is determined based on a target brightness value corresponding to the mixed color, such that the sum of the initial brightness values corresponding to each single color LED is the target brightness value. The color mixing includes: red-green mixed, red-blue mixed, green-blue mixed, red-green-blue mixed. For example, when the mixed color is yellow obtained by mixing red and green, and the target brightness value to be calibrated at this time is a, it is necessary to determine the initial current value a1 of the red LED and the initial current value a2 of the green LED, which are two single-color LEDs, where the theoretical brightness value corresponding to the initial current value a1 of the red LED is a1, the theoretical brightness value corresponding to the initial current value a2 of the green LED is a2, and a is a1+ a 2. Preferably, since a1 is a2, since the current value has a threshold, when a1 is a2, the occurrence of the current value exceeding the threshold may be reduced in the calibration process. For example, when the mixed color is red-yellow-blue mixed, and the target luminance value to be calibrated at this time is B, it is necessary to determine the initial current value B1 of the red LED, the initial current value B2 of the green LED, and the initial current value B3 of the blue LED, which are three single-color LEDs, where the theoretical luminance value corresponding to the initial current value B1 of the red LED is B1, the theoretical luminance value corresponding to the initial current value a2 of the green LED is B2, the theoretical luminance value corresponding to the initial current value A3 of the blue LED is B3, and B is B1+ B2+ B3. Preferably, B1 ═ B2 ═ B3.
And S120, judging whether the brightness value passes the brightness check.
The determining whether the brightness value passes the brightness check may be determining whether the brightness value is within a preset brightness range, where the preset brightness range includes the target brightness value.
And S130, if the brightness check is not passed, determining a calibration brightness current value based on the initial current value, the brightness value and a target brightness value corresponding to the initial current value so that the brightness value obtained according to the calibration brightness current value passes the brightness check.
And if the brightness check is passed, taking the initial current value as a calibrated brightness current value, and ending the brightness check.
If the calibration brightness current value does not pass the brightness verification, the calibration brightness current value is determined, and it can be understood that the brightness value after the calibration obtained through actual detection can pass the brightness verification after the monochromatic LED is lightened according to the calibration brightness current value.
In an implementation manner, in step S130, please refer to fig. 2, and fig. 2 is a schematic flowchart of a process of calibrating a luminance current value according to an embodiment of the present application, which includes:
s131, determining a first calibration current value of each single-color LED by using a first algorithm based on the initial current value, the brightness value and the target brightness value.
Wherein the first algorithm is
Wherein A' is an initial current value, ImIs a brightness value, ItIs the target brightness value and A is the first calibration current value.
S132, updating the initial current value by using the first calibration current value, and executing the step of obtaining the brightness value of each single-color LED when the single-color LEDs are simultaneously lightened under the corresponding initial current value until the calibrated brightness value corresponding to the obtained calibration brightness current value passes through brightness verification.
Specifically, the initial current value is updated by using the first calibration current value, and the calibration brightness value when each single-color LED is simultaneously turned on at the corresponding first calibration current value is obtained.
For example, when the mixed color is yellow, the corresponding single-color LEDs are a red LED and a green LED, the initial current values of the red LED and the green LED are set to be the same, the two LEDs are lit according to the duty ratio of 100%, the mixed brightness value when the two LEDs are simultaneously lit is obtained, and when the brightness value does not pass the brightness check, the first algorithm is used to calculate the brightness value
And calculating to obtain a first calibration current value of the red LED and a first calibration current value of the green LED, lighting the corresponding red LED and the green LED by adopting the first calibration current, and executing the step S131 if the acquired calibration brightness value does not pass the brightness verification until the brightness calibration is finished or the brightness calibration is finished.
It can be understood that the obtained calibration brightness current value is sent to the wearable device, the wearable device lights the single-color LED with the calibration current value, the signal acquisition device acquires the calibrated brightness, and sends the calibrated brightness to the LED calibration device, and the calibrated brightness value can pass through brightness check at the moment so as to complete brightness check. It should be noted that the verification conditions of the luminance verification in step S120 and the luminance verification in this step may be the same or different, for example, when the verification condition in step S120 is within the preset luminance range (P1, P2), the verification condition in this step may be (P1, P2), or (Q1, Q2), and of course, P1< Q1< target luminance value < Q2< P2.
Because PWM and luminance do not have specific linear relation, the PWM of adjusting LED drive current is the average current that changes, and then influence the accuracy of the luminous brightness of LED, through the luminance of adjustment current control monochromatic LED lamp in this application, the luminance of LED and its electric current are nearly direct ratio, so direct mode of choosing the correction current for use can promote the precision and the speed of system calibration when the calibration colour mixture, the number of times of calibration luminance when reducing colour mixture calibration, the error between luminance after the calibration and the true value reduces greatly, avoided utilizing PWM to come the inaccurate problem that the indirect adjustment average current adjusted luminous brightness.
It can be understood that, in the case where the first calibration current value calculated in the verification process exceeds the preset current threshold, but after the first calibration current value exceeds the preset current threshold, the single-color LED cannot be successfully and normally lit. Therefore, in an implementable embodiment, before step S132, specifically include: judging whether the first calibration current value exceeds a preset current threshold value or not; if the current does not exceed the preset current threshold, step S132 is executed. In another practical implementation manner, before step S132, the method specifically includes: it is determined whether the number of times of the first calibration current value determined using the first algorithm exceeds a preset number of times, and if not, step S132 is performed.
Based on the above technical solution, according to the mixed brightness value corresponding to the single-side LED which is simultaneously lit at the initial current value, when the brightness passes the brightness verification, the calibration brightness current value is determined according to the initial current value, the brightness value and the target brightness value, so as to obtain the calibrated brightness value according to the calibration current value to implement the brightness verification.
Based on the foregoing embodiments, the present embodiment provides an LED calibration method, and specifically please refer to fig. 3, where fig. 3 is a flowchart of another LED calibration method provided in the embodiments of the present application, including:
s310, acquiring the brightness value of each single-color LED when the single-color LEDs are simultaneously lighted under the corresponding initial current value.
The present implementation is mainly directed to color mixing, so the number of single color LEDs is 2 or 3.
And S320, judging whether the brightness value passes the brightness check.
S330, if the brightness check is not passed, determining a calibration brightness current value based on the initial current value, the brightness value and a target brightness value corresponding to the initial current value, so that the brightness value obtained after calibration according to the calibration brightness current value passes the brightness check.
And S340, acquiring the color ratio of each single-color LED when being simultaneously lightened under the calibration brightness current value.
After passing the luminance check, color calibration can also be performed for color mixing. Color components of the individual monochromatic LEDs that are simultaneously lit at the calibrated luminance current value are obtained, and a color ratio is determined. For example, when the mixed color is two colors, a first color component corresponding to the first monochromatic LED and a second color component corresponding to the second monochromatic LED are obtained, and the color ratio may be the ratio of the first color component to the second color component, or may be the ratio of the second color component to the first color component. When the mixed color is three colors, obtaining a first color component corresponding to the first monochromatic LED, a second color component corresponding to the second monochromatic LED and a third color component corresponding to the third monochromatic LED, wherein the color ratio can be the ratio of the first color component to the second color component and the ratio of the first color component to the third color component; or the color ratio value may be first color component to second color component, second color component to third color component.
And S350, judging whether the color ratio passes color verification.
Specifically, step S350 specifically includes: and judging whether the color ratio is within the target color ratio range.
Further, before step S350, determining a target color ratio according to the ratio in the RGB color table may be further included. For example, when the color mixture is yellow, the ratio of the target color determined by the ratio in the RGB color table is 1. The target color ratio range is not limited in this embodiment, and may be within a deviation value of the target color ratio, for example, when the deviation value is 0.5, the target color ratio range may be 0.95-1.05.
And S360, if not, obtaining a calibration color current value based on the calibration brightness current value and the brightness ratio so as to enable the color ratio obtained after calibration according to the calibration color current value to pass color verification, wherein the brightness ratio is the slope ratio of any two LED brightness response curves.
If the color verification is not passed, a calibration color current value is obtained based on the verification luminance current value and the luminance ratio, and the color ratio value can be determined to be within the target color ratio value range according to the calibration color current value so as to pass the color verification. And if the color is verified, taking the calibrated brightness current value as a calibrated color current value, and finishing verification through brightness verification.
The brightness ratio is a slope ratio of any two LED brightness response curves, and it can be understood that the brightness ratio is a slope ratio of any two single-color LED brightness response curves, where the brightness response curve refers to a curve corresponding to LED brightness values corresponding to different current values.
In an implementation manner, please refer to fig. 4 in step S360, and fig. 4 is a schematic flowchart illustrating a process of determining a calibration color current value according to an embodiment of the present application, which specifically includes:
and S361, if not, determining a second calibration current value of each single-color LED by using a second algorithm based on the calibration brightness current value and the brightness ratio so as to update the calibration brightness current value by using the second calibration current value.
When the color ratio is smaller than the first color threshold, the corresponding color ratio isThe second algorithm is: a. the1＝A1'+1,A2＝A2'-Ratio；
When the color ratio is greater than the second color threshold, the corresponding second algorithm is:
A1＝A1'-1,A2＝A2'+Ratio；
wherein A is1、A2Respectively representing a second calibration current value of the first LED, a second calibration current value of the second LED, A1’、A2' denotes a calibration luminance current value of the first LED and a calibration luminance current value of the second LED, respectively, Ratio denotes a luminance Ratio, and the first color threshold value and the second color threshold value are a lower threshold value and an upper threshold value of a target color Ratio range, respectively.
It can be understood that, in this embodiment, 1 is used as an increment of current magnitude adjustment, after the second calibration current value obtained in this step is obtained, the color ratio of each single-color LED when it is simultaneously lit at the second calibration current value is obtained, and when it is not within the target color ratio range, the current value is continuously adjusted by 1 in increments according to the second algorithm until the color calibration is completed.
The second calibration current value calculated in the verification process exceeds the preset current threshold, but after the second calibration current value exceeds the preset current threshold, the single-color LED cannot be successfully and normally lighted. Thus, in one implementation, after step 361, it may include: judging whether the second calibration current value exceeds a preset current threshold value or not; judging whether the second calibration current value exceeds a preset current threshold value or not; if not, go to step S362. In another practical implementation, after step 361, it may include: it is determined whether the number of times of the second calibration current value determined using the second algorithm exceeds a preset number of times threshold, and if not, step S362 is performed.
S362, executing the step of obtaining the color ratio of each single-color LED when being simultaneously lightened under the calibration brightness current value until obtaining the calibration color current value.
Acquiring a color ratio of each single-color LED when being simultaneously lightened under a second calibration current value, and judging whether the calibration color ratio is within a target color ratio range; and if the current value is not in the target color ratio range, updating the calibration brightness current value by using a second calibration current value, and determining the second calibration current value of each single-color LED by using a second algorithm based on the calibration brightness current value and the brightness ratio until the calibration color current value is obtained. If the color ratio is within the target color ratio range, the color verification is successful.
It can be understood that the obtained verification color current value is sent to the wearable device, the wearable device lights the single-color LED with the verification color current value, the signal acquisition device acquires the color component after calibration, and sends the color component after calibration to the LED calibration device, at the moment, the brightness value after calibration can determine the color ratio after verification according to the color component after calibration, and the color ratio after verification is in the range of the target color ratio to complete color verification.
Based on the technical scheme, after the brightness is calibrated, color adjustment is performed under the condition that the brightness is consistent, the color component is adjusted by adjusting the current value, the calibration times are greatly reduced, the method is simple, the brightness and the color can be accurately calibrated to the brightness and the color required by a user, and the accuracy of optical display can be improved.
Based on any one of the above embodiments, this embodiment provides a method for calibrating a yellow LED, where yellow is formed by mixing a monochromatic red LED and a monochromatic green LED, and a target brightness value is 2500, including:
acquiring the brightness value of the red LED when the red LED is simultaneously lightened at the initial current value of 15mA and the brightness value of the green LED when the green LED is simultaneously lightened at the initial current value of 15 mA;
judging whether the brightness value passes the brightness check;
it may be determined that the luminance verification is passed when the luminance value is within 2250-2750, and fails when the luminance value is not within 2250-2750.
If not, determining first calibration current values of the red LED and the green LED by using a first algorithm based on the initial current value, the brightness value and the target brightness value;
updating the initial current value by using the first calibration current value, and executing the step of obtaining the brightness value of each single-color LED when the single-color LEDs are simultaneously lighted at the corresponding initial current value until the calibrated brightness value corresponding to the obtained calibration brightness current value passes through brightness verification; wherein the first algorithm is
acquiring the color ratio of the red LED and the green LED when the red LED and the green LED are simultaneously lighted under the calibration brightness current value corresponding to the calibrated brightness value;
judging whether the color ratio passes color verification, specifically judging whether the color ratio is in a target color ratio range;
it can be understood that, according to the RGB color table, if the ratio of the pure yellow red component to the pure yellow green component is 1, the target color ratio is 1, and correspondingly, the set target color ratio range may be 0.95-1.05.
If not, determining a second calibration current value for each of the red and green LEDs using a second algorithm based on the calibration luminance current value, the luminance ratio, to update the calibration luminance current value using the second calibration current value;
executing the step of obtaining the color ratio of the red LED and the green LED when being simultaneously lightened under the calibration brightness current value until obtaining the calibration color current value;
when the color ratio is smaller than the first color threshold, the corresponding second algorithm is: a. the1＝A1'+1,A2＝A2'-Ratio；
When the color ratio is greater than the second color threshold, the corresponding second algorithm is:
A1＝A1'-1,A2＝A2'+Ratio；
wherein A is1、A2Respectively representing a second calibration current value for the red LED, a second calibration current value for the green LED, A1’、A2' indicating red LEDs, respectivelyCalibrating a brightness current value and a calibration brightness current value of the green LED, wherein Ratio represents a brightness Ratio, and a first color threshold and a second color threshold are respectively a lower limit threshold and an upper limit threshold of a target color Ratio range; the brightness ratio is the slope ratio of any two LED brightness response curves;
in a large number of experimental statistical analyses, the Ratio of the brightness of the red light to the brightness of the green light is 2. Ratio when the color Ratio is the Ratio of the red LED color component to the second LED color component and the color Ratio is less than all values in the target color Ratio range<0.95, indicating that the brightness of the red LED is lower than that of the green LED, adjusting the current value of the red LED by taking 1 as increment, and adjusting the current value of the green LED and the red LED by taking Ratio as proportion; the second algorithm is then: a. the1＝A1'+1,A2＝A2' -Ratio; correspondingly, when the color ratio is the ratio of the red LED color component to the green LED color component, and the color ratio is greater than all values in the target color ratio range, the second algorithm is: a. the1＝A1'-1,A2＝A2'+Ratio。
Finally, the brightness calibration and the color calibration of the color mixing, namely the yellow LED, are realized.
Referring to fig. 5, fig. 5 is a schematic structural diagram of an LED calibration device provided in an embodiment of the present application, which includes:
a brightness value obtaining module 510, configured to obtain a brightness value when each of the single-color LEDs is simultaneously turned on at the corresponding initial current value;
a first judging module 520, configured to judge whether the brightness value passes through brightness verification;
the calibration luminance current value determining module 530 is configured to determine, if the luminance verification is not passed, a calibration luminance current value based on the initial current value, the luminance value, and the target luminance value corresponding to the initial current value, so that the luminance value obtained according to the calibration luminance current value passes the luminance verification. In some specific embodiments, the calibration luminance current value determining module 530 includes:
a first calibration current value determination unit for determining a first calibration current value of each single-color LED by using a first algorithm based on the initial current value, the luminance value, and the target luminance value;
the calibration brightness current value acquisition unit is used for updating an initial current value by using a first calibration current value, executing the step of acquiring the brightness value of each single-color LED when the single-color LEDs are simultaneously lightened under the corresponding initial current value until the obtained calibrated brightness value corresponding to the calibration brightness current value passes through brightness verification; wherein the first algorithm is
In some specific embodiments, the method further comprises:
the first current judging module is used for judging whether the first calibration current value exceeds a preset current threshold value or not;
and the first execution module is used for executing the step of updating the initial current value by using the first calibration current value if the initial current value is not the first calibration current value.
In some specific embodiments, the method further comprises:
the color ratio determining module is used for acquiring the color ratio of each single-color LED when the single-color LEDs are simultaneously lightened under the calibration brightness current value;
the second judgment module is used for judging whether the color ratio passes the color verification;
a first calibration color current value obtaining module, configured to obtain a calibration color current value based on the calibration luminance current value and a luminance ratio if the calibration color current value is not the same as the luminance value of the LED, so that the color ratio obtained after calibration according to the calibration color current value passes through color verification, where the luminance ratio is a slope ratio of any two LED luminance response curves;
and the second calibration color current value obtaining module is used for taking the calibration brightness current value as the calibration color current value if the calibration color current value is obtained.
In some specific embodiments, the second determining module includes:
and the judging unit is used for judging whether the color ratio is in the target color ratio range.
In some specific embodiments, the first calibration color current value obtaining module includes:
a current updating determining unit for determining a second calibration current value of each single-color LED by using a second algorithm based on the calibration luminance current value and the luminance ratio if not, so as to update the calibration luminance current value by using the second calibration current value;
a calibration color current value obtaining unit configured to perform a step of obtaining a color ratio of each of the monochromatic LEDs when the monochromatic LEDs are simultaneously lit at the calibration luminance current value until a calibration color current value is obtained;
when the color ratio is smaller than the first color threshold, the corresponding second algorithm is: a. the1＝A1'+1,A2＝A2'-Ratio；
When the color ratio is greater than the second color threshold, the corresponding second algorithm is:
A1＝A1'-1,A2＝A2'+Ratio；
wherein A is1、A2Respectively representing a second calibration current value of the first LED, a second calibration current value of the second LED, A1’、A2' denotes a calibration luminance current value of the first LED and a calibration luminance current value of the second LED, respectively, Ratio denotes a luminance Ratio, and the first color threshold value and the second color threshold value are a lower threshold value and an upper threshold value of a target color Ratio range, respectively.
In some specific embodiments, the method further comprises:
the first current judging module is used for judging whether the second calibration current value exceeds a preset current threshold value or not;
and the first execution module is used for executing the step of acquiring the color ratio of each single-color LED when the single-color LEDs are simultaneously lightened under the calibration brightness current value if the single-color LEDs are not lightened.
Since the embodiment of the LED calibration apparatus portion and the embodiment of the LED calibration method portion correspond to each other, please refer to the description of the embodiment of the LED calibration method portion for the embodiment of the LED calibration apparatus portion, which is not repeated here.
The following describes an LED calibration apparatus provided in an embodiment of the present application, and the LED calibration apparatus described below and the LED calibration method described above may be referred to correspondingly.
The present embodiment provides an LED calibration apparatus, referring to fig. 6, fig. 6 is a structural diagram of an LED calibration apparatus provided in the present embodiment, including:
a memory 100 for storing a computer program;
the processor 200, when executing the computer program, may implement the steps provided by the above embodiments.
Specifically, the memory 100 includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and computer-readable instructions, and the internal memory provides an environment for the operating system and the computer-readable instructions in the non-volatile storage medium to run. The processor 200 provides the computing and control capabilities for the electronic device and when executing the computer program stored in the memory 100, may implement the steps provided by the above-described embodiments.
Since the embodiment of the LED calibration device portion and the embodiment of the LED calibration method portion correspond to each other, please refer to the description of the embodiment of the LED calibration method portion for the embodiment of the LED calibration device portion, which is not repeated here.
On the basis of the foregoing embodiment, as a preferred implementation, referring to fig. 7, fig. 7 is a structural diagram of another LED calibration apparatus provided in an embodiment of the present application, where the LED calibration apparatus further includes:
and an input interface 300 connected to the processor 200, for acquiring computer programs, parameters and instructions imported from the outside, and storing the computer programs, parameters and instructions into the memory 100 under the control of the processor 200. The input interface 300 may be connected to an input device for receiving parameters or instructions manually input by a user. The input device may be a touch layer covered on a display screen, or a button, a track ball or a touch pad arranged on a terminal shell, or a keyboard, a touch pad or a mouse, etc.
And a display unit 400 connected to the processor 200 for displaying data transmitted by the processor 200. The display unit 400 may be a display screen on a PC, a liquid crystal display screen, or an electronic ink display screen.
And a network port 500 connected to the processor 200 for performing communication connection with each external terminal device. The communication technology adopted by the communication connection can be a wired communication technology or a wireless communication technology, such as a mobile high definition link (MHL) technology, a Universal Serial Bus (USB), a High Definition Multimedia Interface (HDMI), a wireless fidelity (WiFi), a bluetooth communication technology, a low power consumption bluetooth communication technology, an ieee802.11 s-based communication technology, and the like.
In the following, a LED calibration system provided by the embodiments of the present application is introduced, and the LED calibration system described below and the LED calibration method described above may be referred to correspondingly. Referring to fig. 8, fig. 8 is a schematic structural diagram of an LED calibration system according to the present embodiment, including:
the LED calibration device 1 as described above;
a wearable device 2 comprising a number of single color LEDs;
and the signal acquisition equipment 3 is used for acquiring the brightness value of each single-color LED of the wearable equipment when the single-color LED is simultaneously lightened under the corresponding initial current value.
The plurality of monochromatic LEDs can comprise 1 monochromatic LED, 2 monochromatic LEDs and 3 monochromatic LEDs, and the user can set the monochromatic LEDs in a user-defined mode as long as the purpose of the embodiment can be achieved.
Further, please refer to fig. 9, where fig. 9 is a schematic structural diagram of a wearable device provided in the embodiment of the present application, including:
the system comprises a single-color LED2-1, an information interaction interface 2-5, a storage center 2-4, an information processing center 2-3 and a signal execution center 2-2.
Specifically, the wearable product 2 comprises the single-color LED2-1, the single-color LED2-1 is not limited in the embodiment, and the user can customize the setting. The wearable product 2 interacts with the LED calibration device 1 through the signal interaction interface 2-5 to obtain different RGB information, wherein the RGB information is current information including but not limited to an initial current value, a calibration brightness current value, a first calibration current value, a second calibration current value and a calibration color current value, and then the RGB information is processed by the information processing center 2-3 of the product to send out corresponding current information, and the information execution center 2-2 is used for lighting a corresponding single-color LED according to the current information. The signal execution center is an RGB LED driver, any driving current can be set, the driving range is 0-25.5mA, the LED is driven to emit light, and the storage center 2-4 is used for storing relevant parameters of the LED driver.
The signal acquisition device 3 acquires the intensity of the RGB signal and the color component of the mixed color signal, and transmits the intensity of the RGB signal and the color component as an input source for LED calibration, which is an optical performance index of the wearable product LED, to the LED calibration device 1 for subsequent LED calibration.
The LED calibration device 1 is a realization unit of an LED optical performance consistency calibration algorithm, and calculates new LED driving current by taking a brightness value, a calibrated color ratio and a calibrated color ratio which are acquired by a signal acquisition unit as input of an LED calibration method, and stores the new LED driving current in a storage center of a wearable product.
Since the embodiment of the LED calibration system portion corresponds to the embodiment of the LED calibration method portion, please refer to the description of the embodiment of the LED calibration method portion for the embodiment of the LED calibration system portion, which is not repeated here.
The work flow of the single-color calibration of the LED calibration system provided by the embodiment of the application comprises the following steps:
a1, the LED calibration device 1 receives the calibration instruction and sends an initial current value to a signal processing center of the wearable device 2;
a2, the signal processing center of the wearable device 2 obtains a control signal according to the initial current value, the control signal is sent to the signal execution center of the wearable device 2, and the signal execution center controls the single-color LED to be turned on under the initial current value according to the control signal;
a3, acquiring the brightness value of the single-color LED by the signal acquisition device 3, and sending the brightness value of the single-color LED to the LED calibration device 1;
a4, the LED calibration device 1 obtains the brightness value, judges whether the brightness value passes the brightness check,
a5, if the brightness check is not passed, determining a first calibration current value of the single-color LED by using a first algorithm based on the initial current value, the brightness value and the target brightness value;
a6, the LED calibration device 1 sends the first calibration current value to a signal processing center of the wearable device 2;
a7, the signal processing center of the wearable device 2 obtains a control signal according to the first calibration current value, the control signal is sent to the signal execution center of the wearable device 2, and the signal execution center controls the single-color LED to be turned on at the first calibration current value according to the control signal;
a8, the signal acquisition equipment 3 acquires the calibration brightness value of the single-color LED and sends the calibration brightness value of the single-color LED to the LED calibration equipment 1;
a9, the LED calibration equipment 1 acquires a calibration brightness value;
a10, the LED calibration device 1 judges whether the calibration brightness value passes the brightness check;
and A11, if the brightness check is not passed, repeating the steps A5-A10 until a calibrated brightness current value is obtained, and obtaining a calibrated brightness value according to the calibrated brightness current value so that the calibrated brightness value passes the brightness check.
The workflow of mixed color calibration of an LED calibration system provided by the embodiment of the application comprises the following steps:
b1, the LED calibration equipment 1 sequentially acquires the single-color brightness value of each single-color LED under the corresponding initial current value;
b2, the LED calibration equipment 1 calculates the brightness ratio according to the single-color brightness value;
b3, the LED calibration equipment 1 receives the calibration instruction and sends the initial current value corresponding to each single-color LED to the signal processing center of the wearable equipment 2;
b4, the signal processing center of the wearable device 2 obtains a control signal according to the initial current value, the control signal is sent to the signal execution center of the wearable device 2, and the signal execution center controls each single-color LED to be lightened under the corresponding initial current value according to the control signal;
b5, the signal acquisition equipment 3 acquires the mixed brightness value of the single-color LED and sends the mixed brightness value to the LED calibration equipment;
b6, the LED calibration device 1 obtains the brightness value, determines whether the brightness value passes the brightness check,
b7, if the brightness check is not passed, determining a first calibration current value of each single-color LED by using a first algorithm based on the initial current value, the brightness value and the target brightness value;
b8, the LED calibration equipment 1 sends the first calibration current value to a signal processing center of the wearable equipment 2;
b9, the signal processing center of the wearable device 2 obtains a control signal according to the first calibration current value, and sends the control signal to the signal execution center of the wearable device 2, and the signal execution center controls each monochromatic LED to be simultaneously turned on at the corresponding first calibration current value according to the control signal;
b10, the signal acquisition equipment 3 acquires the mixed calibration brightness value of the single-color LED and sends the calibration brightness value of the single-color LED to the LED calibration equipment;
b11, the LED calibration equipment 1 acquires a calibration brightness value;
b12, the LED calibration equipment 1 judges whether the calibration brightness value passes the brightness check;
b13, if the brightness check is not passed, repeating the steps B7-B12 until a calibrated brightness current value is obtained, and obtaining a calibrated brightness value according to the calibrated brightness current value so that the calibrated brightness value passes the brightness check;
c1, acquiring color components when each single-color LED is simultaneously lightened under a calibration brightness current value corresponding to the calibrated brightness value by the signal acquisition equipment 3, and sending the color components to the LED calibration equipment 1;
c2, the LED calibration device 1 acquires the color component of each single-color LED and determines the color ratio according to all the color components; judging whether the color ratio is within the range of the target color ratio;
c3, if not in the target color ratio range, determining a second calibration current value of each single-color LED by using a second algorithm based on the calibration brightness current value and the brightness ratio;
c4, the LED calibration device 1 sends the second calibration current value to the signal processing center of the wearable device 2;
c5, the signal processing center of the wearable device 2 obtains a control signal according to the second calibration current value, and sends the control signal to the signal execution center of the wearable device 2, and the signal execution center controls the single-color LEDs to be simultaneously turned on at the corresponding second calibration current value according to the control signal;
c6, acquiring the color component of the single-color LED by the signal acquisition equipment 3, and sending the color component to the LED calibration equipment 1;
c7, the LED calibration equipment 1 obtains color components and calculates to obtain a calibration color ratio; judging whether the calibration color ratio is within the target color ratio range;
c8, if the color ratio is not in the target color ratio range, updating the calibration brightness current value by the second calibration current value, repeating the steps C3-C7 until the calibration color current value is obtained, and obtaining the calibrated color ratio according to the calibration color current value so as to enable the calibrated color ratio to be in the target color ratio range.
In the following, a computer-readable storage medium provided by an embodiment of the present application is described, and the computer-readable storage medium described below and the LED calibration method described above may be referred to correspondingly.
The present embodiment provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of the above-mentioned LED calibration method.
Since the embodiment of the computer-readable storage medium portion corresponds to the embodiment of the LED calibration method portion, please refer to the description of the embodiment of the LED calibration method portion for the embodiment of the computer-readable storage medium portion, which is not repeated here.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (10)
1. An LED calibration method, comprising:
acquiring the brightness value of each single-color LED when being simultaneously lightened under the corresponding initial current value;
judging whether the brightness value passes the brightness check;
if not, determining a calibration brightness current value based on the initial current value, the brightness value and a target brightness value corresponding to the initial current value, so that the brightness value obtained according to the calibration brightness current value passes through the brightness check.
2. The LED calibration method of claim 1, wherein said determining a calibration luminance current value based on said initial current value, said luminance value, and a target luminance value corresponding to said initial current value comprises:
determining a first calibration current value for each of the single color LEDs using a first algorithm based on the initial current value, the brightness value, and the target brightness value;
updating the initial current value by using the first calibration current value, and executing the step of obtaining the brightness value of each single-color LED when the single-color LEDs are simultaneously lighted at the corresponding initial current value until the obtained calibrated brightness value corresponding to the calibrated brightness current value passes through brightness check; wherein the first algorithm is
3. The LED calibration method according to claim 2, wherein said updating the initial current value with the first calibration current value is performed before said obtaining the brightness value of each single-color LED when simultaneously lit at the corresponding initial current value, further comprising:
judging whether the first calibration current value exceeds a preset current threshold value or not;
if not, the step of updating the initial current value by using the first calibration current value is executed.
4. The LED calibration method according to any one of claims 1 to 3, wherein the determining a calibration luminance current value based on the initial current value, the luminance value, and a target luminance value corresponding to the initial current value so that a calibrated luminance value obtained from the calibration luminance current value passes the luminance verification further comprises:
acquiring the color ratio of each single-color LED when being simultaneously lightened under the calibration brightness current value;
judging whether the color ratio passes color verification;
if not, obtaining a calibration color current value based on the calibration brightness current value and the brightness ratio so as to enable the color ratio obtained after calibration according to the calibration color current value to pass through the color verification, wherein the brightness ratio is the slope ratio of any two LED brightness response curves;
and if so, taking the calibration brightness current value as the calibration color current value.
5. The LED calibration method of claim 4, wherein said determining whether the color ratio passes a color check comprises:
and judging whether the color ratio is in a target color ratio range.
6. The LED calibration method of claim 5, wherein if not, obtaining a calibration color current value based on the calibration luminance current value and the luminance ratio comprises:
if not, determining a second calibration current value for each of the single-color LEDs using a second algorithm based on the calibration luminance current value and the luminance ratio to update the calibration luminance current value using the second calibration current value;
executing the step of obtaining the color ratio of each single-color LED when being simultaneously lightened under the calibration brightness current value until the calibration color current value is obtained;
when the color ratio is smaller than the first color threshold, the corresponding second algorithm is:
A1＝A1'+1,A2＝A2'-Ratio；
when the color ratio is greater than a second color threshold, the corresponding second algorithm is:
A1＝A1'-1,A2＝A2'+Ratio；
wherein A is1、A2Respectively representing a second calibration current value of the first LED, a second calibration current value of the second LED, A1’、A2' represents a calibration luminance current value of a first LED and a calibration luminance current value of a second LED, respectively, and Ratio represents a luminance Ratio, and the first color threshold value and the second color threshold value are a lower threshold value and an upper threshold value of the target color Ratio range, respectively.
7. The LED calibration method of claim 6, wherein said determining a second calibration current value for each of said single-color LEDs using a second algorithm based on said calibration luminance current value and said luminance ratio to update said calibration luminance current value with said second calibration current value further comprises:
judging whether the second calibration current value exceeds a preset current threshold value or not;
and if not, executing the step of obtaining the color ratio of each single-color LED when being simultaneously lightened under the calibration brightness current value.
8. An LED calibration device, comprising:
the brightness value acquisition module is used for acquiring the brightness value of each single-color LED when the single-color LEDs are simultaneously lightened under the corresponding initial current value;
the first judgment module is used for judging whether the brightness value passes the brightness check;
and the calibration brightness current value determining module is used for determining a calibration brightness current value based on the initial current value, the brightness value and a target brightness value corresponding to the initial current value if the brightness check is not passed, so that the brightness value obtained according to the calibration brightness current value after calibration passes the brightness check.
9. An LED calibration apparatus, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the LED calibration method according to any one of claims 1 to 7 when executing the computer program.
10. An LED calibration system, comprising:
an LED calibration device as claimed in claim 9;
a wearable device comprising a number of single color LEDs;
and the signal acquisition equipment is used for acquiring the brightness value of each single-color LED of the wearable equipment when the single-color LED is simultaneously lightened at the corresponding initial current value.
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