KR101192263B1 - Illumination sensing device and error detecting/correcting method thereof - Google Patents
Illumination sensing device and error detecting/correcting method thereof Download PDFInfo
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- KR101192263B1 KR101192263B1 KR20100122394A KR20100122394A KR101192263B1 KR 101192263 B1 KR101192263 B1 KR 101192263B1 KR 20100122394 A KR20100122394 A KR 20100122394A KR 20100122394 A KR20100122394 A KR 20100122394A KR 101192263 B1 KR101192263 B1 KR 101192263B1
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Abstract
An illuminance detection device and an error detection and error correction method thereof are disclosed. An illumination detection device according to an embodiment of the present invention, the sensor for sensing the light from the light source and converting it into first illumination data; An error detector which detects a difference between the first illuminance data and second illuminance data which is illuminance set for the light source during a test for calculating a final correction value for an error of the illuminance detection device; The temporary correction value is generated when the difference between the first illuminance data and the second illuminance data exceeds an error tolerance range, or the final correction value is generated when the difference between the first illuminance data and the second illuminance data is less than or equal to the error tolerance. An error correction unit generating and applying the temporary correction value or the final correction value to the sensor; And a fusing unit configured to output a fuse value generated by cutting a fuse corresponding to a fusing signal among a plurality of fuses included when the difference between the first illuminance data and the second illuminance data is equal to or less than an error tolerance range. The error correction unit calculates the final correction value in response to the fusing value.
Description
The present invention relates to an illumination detection device, and an error detection and error correction method thereof, and more particularly, to an illumination detection device capable of improving performance by detecting and correcting an error efficiently, and an error detection and error correction method thereof.
The photodiode has fast response speed, wide sensitivity wavelength, and good linearity of photocurrent. Therefore, it is used for signal receivers of CD players, fire alarms, and remote controllers of various devices.
Photodiodes are also used to accurately measure light intensity. A photodiode is a kind of optical sensor that converts light energy into electrical energy. The photodiode is a semiconductor device manufactured by providing a photodetection function to a junction of a diode. An element that can measure the brightness of the surroundings from the photocurrent converted from the light source sensed by the photodiode is called an illuminance detection device. The illuminance detection device quantifies the brightness of the sensing area.
However, an error that outputs different values for the same illuminance may exist in the illuminance detection device. Such an error may cause a problem of degrading the performance of the device and the performance of the electronic device in which the device is included.
An object of the present invention is to provide an illumination detection device capable of performing accurate sensing by detecting and correcting errors between illumination detection devices efficiently, and an error detection and error correction method thereof.
In order to achieve the above object, an illuminance detection device according to an embodiment of the present invention includes a sensor for sensing light from a light source and converting the light into first illuminance data; An error detector which detects a difference between the first illuminance data and second illuminance data which is illuminance set for the light source during a test for calculating a final correction value for an error of the illuminance detection device; The temporary correction value is generated when the difference between the first illuminance data and the second illuminance data exceeds an error tolerance range, or the final correction value is generated when the difference between the first illuminance data and the second illuminance data is less than or equal to the error tolerance. An error correction unit generating and applying the temporary correction value or the final correction value to the sensor; And a fusing unit configured to output a fuse value generated by cutting a fuse corresponding to a fusing signal among a plurality of fuses included when the difference between the first illuminance data and the second illuminance data is equal to or less than an error tolerance range. The error correction unit calculates the final correction value in response to the fusing value.
Preferably, the sensor includes a sensing element, a signal detector for generating a sensing value by receiving light from the light source using the sensing element; And a signal converter configured to generate the first illuminance data having a digital value by analog-to-digital converting the sensing value, the sensing value and the temporary correction value, or the sensing value and the final correction value.
Preferably, when the difference between the first illuminance data and the second illuminance data exceeds an error tolerance range, when the difference between the first illuminance data and the second illuminance data to which the temporary correction value is applied falls below an error tolerance range. Until then, the signal converter is configured to perform the analog-to-digital conversion of the sum of the sensing value and the temporary correction value to generate the first illuminance data whose error is temporarily corrected, and the error detector is the temporary correction. Detects an error between the first illuminance data and the second illuminance data to which a value is applied, and the error corrector may update the temporary correction value.
In this case, the error detector may further include a storage unit for storing the updated temporary correction value. The error correcting unit may generate a fusing signal corresponding to a temporary correction value when the difference between the first illuminance data and the second illuminance data to which the temporary correction value is applied is equal to or less than an error tolerance range, and the fusing unit is configured to perform the fusing unit. In response to a fusing signal, the fusing value may be transmitted to the error correcting unit. In this case, the signal converter may output the first illuminance data whose error is corrected by performing an analog-digital conversion on the value including the sensing value and the final correction value.
Alternatively, when the difference between the first illuminance data and the second illuminance data exceeds an error tolerance, until the reflection of the temporary correction value for the first illuminance data is performed n (n is an integer of 2 or more) The signal converter may perform the analog-digital conversion on the sum of the sensing value and the temporary correction value to generate the first illuminance data with the error temporarily corrected, and the error detection unit may include the temporary correction value. The error of the applied first illuminance data and the second illuminance data may be detected, and the error correcting unit may update the temporary correction value. In this case, even when the reflection of the temporary correction value for the first illuminance data is performed more than n times, when the difference between the first illuminance data and the second illuminance data exceeds an error tolerance, correction for the error is performed. The operation can be terminated. The error detection unit may include a counter that counts the number of times that the temporary correction value is reflected in the first illuminance data.
Preferably, the error correction unit may calculate the temporary correction value in response to a pre-correction signal generated from the error detection unit when the difference between the first illumination data and the second illumination data exceeds an error tolerance range. have. In this case, the error correction unit receives a reference current in response to the pre-correction signal, adds or subtracts a correction current to the reference current to generate a temporary correction current that is the temporary correction value, and converts the temporary correction current to the sensor. Can supply Alternatively, the error correction unit may receive a reference voltage in response to the pre-correction signal, generate a temporary correction voltage that is the temporary correction value corresponding to a difference between the reference voltage and the correction voltage, and convert the temporary correction voltage into the sensor. Can be applied as
Preferably, the error correction unit may further include a reference value generator for generating a reference value used to calculate the temporary correction value or the final correction value, and transmits the reference value to the error correction unit.
Preferably, the sensor is provided in plurality, it is possible to detect and correct the error of the illumination detection between the sensors.
According to an exemplary embodiment of the present invention, a display apparatus may receive an error-corrected first illuminance data from the illuminance detection device and set a screen to a brightness corresponding to the first illuminance data.
According to the illuminance detection device and the error detection and error correction method thereof according to the embodiment of the present invention, there is an advantage that the performance can be improved by efficiently detecting and correcting an error inevitably generated in a circuit design and a process.
In addition, the display device having the illumination detection device according to the embodiment of the present invention has an advantage of reducing power consumption by adjusting the brightness of the screen according to the ambient brightness by using the illumination data whose error is corrected.
BRIEF DESCRIPTION OF THE DRAWINGS In order to better understand the drawings cited in the detailed description of the invention, a brief description of each drawing is provided.
1 is a diagram illustrating an illuminance detection device according to an embodiment of the present invention.
2 is a flowchart illustrating an error detection and correction method in an illuminance detection apparatus according to an embodiment of the present invention.
3 and 4 are diagrams conceptually showing examples of an error correction operation of the error correction unit of FIG. 1, respectively.
5 is a flowchart illustrating an error detection and correction method in an illuminance detection apparatus according to another exemplary embodiment of the present invention.
6 is a diagram illustrating an operation of an illuminance detection apparatus according to another embodiment of the present invention.
FIG. 7 is a diagram illustrating a display device including an illuminance detection device according to an exemplary embodiment of the present invention.
In order to fully understand the present invention, operational advantages of the present invention, and objects achieved by the practice of the present invention, reference should be made to the accompanying drawings and the accompanying drawings which illustrate preferred embodiments of the present invention.
Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.
1 is a view showing an LED test system according to an embodiment of the present invention. 1 is a diagram illustrating an illuminance detection apparatus according to an embodiment of the present invention, and FIG. 2 is a flowchart illustrating an error detection and correction method of the illuminance detection apparatus according to an embodiment of the present invention.
1 and 2, an illuminance detection device LSD according to an exemplary embodiment of the present invention may include a signal detector IS, a signal converter SC, an error detector ED, an error corrector CAL, and a reference value. A generation unit IG and a fusing unit FUS are included to detect and correct an error 200. To this end, the illuminance detection device LSD according to the embodiment of the present invention first receives the light value LVAL through the signal detection unit IS including the sensing element S to generate the sensing value SVAL. The signal conversion unit SC converts the first illuminance data OLDTA into operation S210. In this case, the signal detector IS may include a photodiode (not shown) as the sensing element S to output the received light signal LIG as a sensing value SVAL of current or voltage. The signal converter SC may be an analog-to-digital converter (not shown). That is, the signal converter SC may output the first illuminance data OLDTA obtained by converting the sensing value SVAL as a digital value.
The first illuminance data OLDTA is generated and output by the signal converter SC and is input to the error detector ED. The error detector ED receives the second illuminance data TLDTA together with the first illuminance data OLDTA. The second illuminance data TLDTA has a value of illuminance set in the light source LS in a test step for correcting an error of the illuminance detection device LSD according to the embodiment of the present invention. The second illuminance data TLDTA may be applied to the error detector ED by an apparatus (not shown) that controls the light source LS.
The error detector ED detects a difference between the first illuminance data OLDTA and the second illuminance data TLDTA (S220). If the difference between the first illuminance data OLDTA and the second illuminance data TLDTA detected by the error detector ED is within an allowable range (for example, ± 10 lux) (“YES” in S230), the present invention The illuminance detection device LSD according to the embodiment of the present invention ends the error detection and correction operation. In this case, the allowable range of the error may be set by the characteristics of the error detection device or the electronic device including the error detection device.
On the other hand, if the difference between the first illuminance data OLDTA and the second illuminance data TLDTA is greater than the allowable range (“NO” in S230), the error detector ED may use the illuminance detection apparatus according to the embodiment of the present invention ( LSD) performs error correction.
In the illuminance detection device LSD according to the embodiment of the present invention, first, the signal converter SC adjusts the temporary correction value CVAL 'in order to determine the final correction value CVAL that can correct the detected error. It can be applied to generate the first roughness data (OLDTA). In detail, the error detector ED may generate a pre-correction signal XPre that instructs the reference value generator IG and the error correction unit CAL to perform a calculation operation on the temporary correction value CVAL '(S240). Can be authorized.
The reference value generator IG may apply the reference value RVAL to the error correction unit CAL. In this case, the reference value RVAL may be a value for current or voltage. In response to the pre-correction signal XPre, the error correction unit CAL calculates a temporary correction value CVAL 'with respect to the reference value RVAL (S240).
3 and 4 are diagrams conceptually showing examples of an error correction operation of the error correction unit of FIG. 1, respectively.
1 and 3, the error correcting unit CAL according to an exemplary embodiment of the present invention performs correction using a current. In this case, the reference value RVAL supplied to the error correction unit CAL may be a value (size) of the reference current Iref. The error corrector CAL may add or subtract the reference current Iref and the first current Ical to supply the temporary correction value CVAL 'to the signal converter SC. In FIG. 3, the temporary correction value CVAL ′ is a value of the correction current I CVAL .
The first current Ical may be set to a value corresponding to the pre-correction signal XPre. For example, the pre-correction signal XPre may include information about an error value detected by the error detector ED. Accordingly, the first current Ical may be generated as a negative value when the error value included in the pre-correction signal XPre has a positive value, and the error value included in the pre-correction signal XPre is negative. If it has a value, it can be generated as a positive value. FIG. 3 is a conceptual diagram illustrating the error correction operation, although the positive first current (+ Ical) and the negative first current (-Ical) are simultaneously reflected in the correction current I CVAL , but the pre-correction signal Note that in response to (XPre) only one of the two is reflected in the correction current (I CVAL ). In addition, the first current Ical may be generated as a large value when the magnitude of the error value included in the pre-correction signal XPre is large. Can be generated by value.
1 and 4, the error correcting unit CAL according to an exemplary embodiment of the present invention may perform correction using a voltage. In this case, the reference value RVAL applied to the error correction unit CAL may be a value (size) of the reference voltage Vref. The error corrector CAL may include an OP amplifier OA that amplifies the difference between the reference voltage Vref and the first voltage Vcal. Like the first current Ical, the first voltage Vcal may be set to a value corresponding to the pre-correction signal XPre. The output of the OP amplifier OA may be supplied to the signal converter SC as a temporary correction value CVAL '. In FIG. 4, the temporary correction value CVAL ′ is a value of the correction voltage V CVAL . The error correcting unit CAL according to the exemplary embodiment of the present invention may be implemented with various types of OP amplifiers OA.
The temporary correction value CVAL 'calculated by the method of FIG. 3 or 4 is transmitted to the signal converter SC. Referring back to FIG. 1, the signal conversion unit SC reflects the temporary correction value CVAL 'to the sensing value SVAL and converts the first illuminance data OLDTA to the first illuminance data OLDTA (S250). For example, if the sensing value SVAL and the temporary correction value CVAL 'are values for current, the signal converter SC converts the analog-to-digital conversion of the current obtained by adding the sensing value and the temporary correction value CVAL'. The first illuminance data OLDTA may be generated by performing the operation.
The first illuminance data OLDTA is output from the signal converter SC and is also input to the error detector ED. The error detector ED detects an error by comparing the newly input first illuminance data OLDTA with the second illuminance data TLDTA (S260). If the error detected through the temporary correction step is larger than the allowable range (“NO” in S270), the illuminance detection device LSD according to the embodiment of the present invention may repeat the temporary correction operations S240 to S270. have. That is, the temporary correction value CVAL 'is updated until the detected error is smaller than the allowable range through the temporary correction step.
On the other hand, if the error detected through the temporary correction step is smaller than the allowable range (“YES” in S270), the error detector ED of the illuminance detection device LSD according to the embodiment of the present invention may detect the fusing signal XFus. Transfer it to the fusing unit (FUS). The fusing signal XFus may include information on the temporary correction value CVAL 'applied to the first illuminance data OLDTA inputted to the current error detector ED. To this end, the error detector ED may include a storage unit M that receives and stores a temporary correction value CVAL 'from the error corrector CAL.
The fusing unit FUS may include fuses F. The fusing unit FUS may cut the number of fuses F corresponding to the fusing signal XFus in response to the fusing signal XFus. That is, the fusing unit FUS may cut the number of fuses F corresponding to the temporary correction value CVAL 'included in the fusing signal XFus. The fusing unit FUS transmits a fusing value FVAL corresponding to the number of cut fuses F to the error correcting unit CAL.
The error corrector CAL transmits a final correction value CVAL corresponding to the fusing value FVAL to the signal converter SC. In this case, the final correction value CVAL may be the same as the temporary correction value CVAL 'included in the fusing signal XFus. That is, since the fusing value FVAL is fixed to a specific value according to the physical cutting of the fuses F, the final correction value CVAL corresponding to the fusing value FVAL may also have a fixed value.
The operation of calculating the final correction value CVAL by the error correcting unit CAL is except that the first voltage Vcal and the first current Ical are fixed values corresponding to the fusing value FVAL. And FIG. 4. That is, the correction current I CVAL or the correction voltage V CVAL becomes the final correction value CVAL.
The error correction unit CAL applies the fixed final correction value CVAL to the signal conversion unit SC, and the signal conversion unit SC performs a sensing operation whenever the included illumination detection device LSD performs a sensing operation. The first illuminance data OLDTA is generated by reflecting the final correction value CVAL corresponding to the error. Therefore, the illuminance detection device LSD according to the embodiment of the present invention can perform correction for errors inevitably generated in the circuit design and processing steps.
In the above, when the error detection unit ED detects an error, no limit is placed on the number of repetitions. However, according to FIG. 5, which shows an error detection and correction method of an illuminance detection device according to another embodiment of the present invention, the error detection unit ED may set the number of corrections (n, n is an integer of 2 or more) for error detection. have.
That is, the error detection and
The error detection and
6 is a diagram illustrating an operation of an illuminance detection apparatus according to another embodiment of the present invention.
1 and 6, the illuminance detection device LSD of FIG. 1 includes only a signal detector IS and a signal converter SC, whereas the illuminance detection device LSD of FIG. 6 is provided in plurality. It can be provided. If the signal detector and the signal converter are combined sensors, Fig. 6 shows an example with three sensors in particular. The three sensors generate illuminance data OLDTA of 1180 lux, 790 lux, and 840 lux as a result of sensing illuminance from a light source set to a value of 1000 lux of the second illuminance data TLDTA, respectively. At this time, if the error tolerance range allowed by the illuminance detection device LSD of FIG. 6 is ± 10 lux, all three sensors exceed the error tolerance range.
Therefore, as described with reference to FIG. 1, the temporary correction value CVAL 'is calculated and a pre-calibration operation is performed on the first illuminance data OLDTA to which the temporary correction value CVAL' is applied. As a result of performing the pre-calibration, the sensors generate the first illuminance data (OLDTA) at 1008 lux, 998 lux and 1003 lux, respectively, cutting the fuses so that each sensor has a 1000 lux light source. Sensing with 1008 lux, 998 lux and 1003 lux with error correction.
6 illustrates an example in which only three sensors are provided. However, the present disclosure is not limited thereto and various numbers of sensors may be provided. As such, the illuminance detection apparatus according to the embodiment of the present invention may adjust errors between the plurality of sensors.
FIG. 7 is a diagram illustrating a display device including an illuminance detection device according to an exemplary embodiment of the present invention.
1 and 7, the display device DD according to an embodiment of the present invention receives the first illuminance data OLDTA whose error is corrected from the illuminance detection device LSD according to the embodiment of the present invention. You can adjust the brightness of the screen according to the surrounding brightness. Accordingly, the display device DD according to the embodiment of the present invention can reduce power consumption.
As described above, optimal embodiments have been disclosed in the drawings and the specification. Although specific terms are employed herein, they are used for purposes of describing the present invention only and are not used to limit the scope of the present invention. For example, after the error detector ED of FIG. 1 calculates the final correction value CVAL of the illumination detection device LSD according to the embodiment of the present invention, the error detection unit ED is separated from the illumination detection device according to the embodiment of the present invention. May be
Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.
Claims (15)
A sensor for sensing light from a light source and converting the light into first illumination data;
An error detector which detects a difference between the first illuminance data and second illuminance data which is illuminance set for the light source during a test for calculating a final correction value for an error of the illuminance detection device;
The temporary correction value is generated when the difference between the first illuminance data and the second illuminance data exceeds an error tolerance range, or the final correction value is generated when the difference between the first illuminance data and the second illuminance data is less than or equal to the error tolerance. An error correction unit generating and applying the temporary correction value or the final correction value to the sensor; And
At least one fuse cut in response to a fusing signal including information on the temporary correction value when the difference between the first illuminance data and the second illuminance data is equal to or less than an error tolerance range, and the number of cut fuses A fusing unit configured to generate and output a fusing value corresponding to
The error correction unit,
And in response to the fusing value, calculate the final correction value including information about the temporary correction value included in the fusing signal.
A signal detector including a sensing element and generating a sensing value of the light transmitted from the light source using the sensing element; And
And a signal converter configured to generate the first illuminance data having a digital value by analog-to-digital converting the sensing value, the sensing value and the temporary correction value, or the sensing value and the final correction value. Detection device.
When the difference between the first illuminance data and the second illuminance data exceeds the error tolerance range, until the difference between the first illuminance data and the second illuminance data to which the temporary correction value is applied is less than or equal to the error tolerance range,
The signal converter,
Performing the analog-digital conversion on the sum of the sensing value and the temporary correction value to generate the first illuminance data with the error temporarily corrected,
The error detector,
Detects an error between the first illuminance data and the second illuminance data to which the temporary correction value is applied;
The error correction unit,
And illuminating the temporary correction value.
And a storage unit for storing the temporary correction value to be updated.
The error correction unit,
When the difference between the first illuminance data to which the temporary correction value is applied and the second illuminance data is less than an error tolerance, a fusing signal including information about the temporary correction value applied to the first illuminance data is generated to the fusing unit. An illuminance detection device, characterized in that output.
And an analog-to-digital conversion of the value including the sensing value and the final correction value to output first illuminance data with error correction.
When the difference between the first illuminance data and the second illuminance data exceeds the error tolerance, until the number of times the temporary correction value is applied to the first illuminance data is n (n is an integer of 2 or more),
The signal converter,
Performing the analog-digital conversion on the sum of the sensing value and the temporary correction value to generate the first illuminance data with the error temporarily corrected,
The error detector,
Detects an error between the first illuminance data and the second illuminance data to which the temporary correction value is applied;
The error correction unit,
And illuminating the temporary correction value.
When the difference between the first illuminance data and the second illuminance data exceeds the error tolerance in a state where the temporary correction value is applied to the first illuminance data more than n times,
And an end of the correction operation for the error.
And a counter for counting the number of times the temporary correction value is applied to the first illuminance data.
The temporary correction value is calculated in response to a pre-correction signal generated from the error detector when the difference between the first illuminance data and the second illuminance data exceeds an error tolerance range.
The pre-correction signal is,
And an information on a difference between the first illuminance data and the second illuminance data.
Receiving a reference current from a reference value generator, adding or subtracting a correction current to the reference current in response to the pre-correction signal to generate a temporary correction current that is the temporary correction value, and supplying the temporary correction current to the sensor. Illumination detection device characterized in that.
Receiving a reference voltage from a reference value generator, generating a temporary correction voltage which is the temporary correction value corresponding to a difference between the reference voltage and the correction voltage in response to the pre-correction signal, and applying the temporary correction voltage to the sensor Illuminance detection device, characterized in that.
The sensor is provided with a plurality of illumination intensity detection device, characterized in that for detecting and correcting the error of the illumination detection between the sensors.
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| KR101656702B1 (en) * | 2015-05-21 | 2016-09-13 | 재단법인 한국기계전기전자시험연구원 | Apparatus and method for evaluating integrating sphere system |
| KR20230028662A (en) | 2021-08-20 | 2023-03-02 | (주)카탈로닉스 | How to Calibrate Night Illumination Data |
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| KR101312533B1 (en) * | 2012-09-28 | 2013-09-30 | (주) 넥스트칩 | Luminous intensity detecting apparatus and method having high sensitivity |
| KR102381129B1 (en) * | 2015-12-28 | 2022-03-31 | (주) 솔 | The method of calibration of packaged photonic sensor pixel array by evaluating its characteristic |
| KR102323840B1 (en) * | 2020-04-01 | 2021-11-10 | 주식회사 에프에스티 | Correction device and Correction method |
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| KR20230028662A (en) | 2021-08-20 | 2023-03-02 | (주)카탈로닉스 | How to Calibrate Night Illumination Data |
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