CN102478430A - Light color determination method of light-emitting diode - Google Patents
Light color determination method of light-emitting diode Download PDFInfo
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- CN102478430A CN102478430A CN2010105908895A CN201010590889A CN102478430A CN 102478430 A CN102478430 A CN 102478430A CN 2010105908895 A CN2010105908895 A CN 2010105908895A CN 201010590889 A CN201010590889 A CN 201010590889A CN 102478430 A CN102478430 A CN 102478430A
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Abstract
The invention discloses a light color determination method of a light-emitting diode, which comprises the following steps: setting photosensitive area and photosensitive time of a sensing element according to area parameters and time parameters; receiving light rays by using the sensing element to acquire a first red component, a first green component and a first blue component; comparing the magnitude of the first red component, the first green component and the first blue component to acquire a maximum value; when the maximum value is within a first interval range or second interval range, carrying out a compensation process to output a second red component, a second green component and a second blue component; carrying out a format conversion process on the second red component, the second green component and the second blue component to acquire a color value; and judging whether the color value is within an expected range to output a result signal. Therefore, the method can enhance probability for correctly determining the light color.
Description
Technical field
The present invention relates to a kind of decision method of glow color, relate in particular to a kind of glow color decision method of light emitting diode.
Background technology
Along with continually developing of light emitting diode, the briliancy of light emitting diode or serviceable life significantly improve, and it is progressively replacing the traditional lighting element.Replace the original electroluminescence (Electroluminescent of hand-held device with LED backlight; EL) backlight, CCFL (Cold Cathode Fluorescent Lamps; CCFL) backlight, not only circuit design is more easily succinct, and higher outer the receiving property of resisting strenuously is arranged.It is backlight to replace the original CCFL of LCD with LED backlight, and not only more environmental protection but also demonstration are more true to nature beautiful.Replace illuminations such as white light, Halogen lamp LED with led lighting, not only brighter power saving, term of life is also longer, and the speed of lighting is faster, also can reduce car overtaking collision rate in back when being used for brake light.Except the application of illumination, most electronic product also all adopts light emitting diode as pilot lamp, and for example motherboard, display card and network card also all have light emitting diode lamp, are used for indicating the duty of circuit board.
The test of light emitting diode all is to adopt manual type all the time; Manual testing's shortcoming is easily because the fatigue and the subjective factor of vision; Can produce the bigger error rate of distinguishing, and can't judge more accurately the color of brightness and light emitting diode.
For addressing the above problem; Existing dealer proposes to utilize light-emitting diode detection device to replace the manual testing; But, make light-emitting diode detection device in test process, can't judge more accurately to the color of light emitting diode because the light that light emitting diode sent is non-linear (light that is multiple wave band is formed).
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of glow color decision method of light emitting diode, with solution existing in prior technology problem, and improves light-emitting diode detection device the color of light emitting diode is judged more accurately.
According to an embodiment of the glow color decision method of the light emitting diode that the present invention disclosed, the glow color decision method of light emitting diode comprises: the time of setting photosensitive area with the photosensitive area reception light of sensitive element with area parameters and time parameter; Receive light through sensitive element and obtain first red component, first green component and first blue component; Compare the size of first red component, first green component and first blue component and obtain maximal value; Judge maximal value whether in first interval range or second interval range, wherein first interval range is greater than hexadecimal 0xF2, and second interval range is for more than or equal to hexadecimal 0x47 and be less than or equal to hexadecimal 0x4c; When maximal value is in first interval range or second interval range, compensates process and export second red component, second green component and second blue component; Second red component, second green component and second blue component are carried out the format conversion process and obtain color-values; And judge that color-values is whether in desired extent and output result signal.
Wherein, Judging that this maximal value is whether after the step in this first interval range or this second interval range; The glow color decision method of this light emitting diode more comprises: when this maximal value is not in this first interval range or this second interval range, receive this area parameters and this time parameter again; When receiving this area parameters and this time parameter again, increase the size of a count parameter; Judge that this count parameter is less than or equal to a pre-determined number; When this count parameter during, judge that this maximal value is whether in this first interval range or this second interval range less than this pre-determined number; When this count parameter when this pre-determined number and this maximal value are in this first interval range or this second interval range, this maximal value is carried out this compensation process and is exported this second red component, this second green component and this second blue component; When this count parameter equals this pre-determined number, judge that this maximal value is whether in this first interval range or this second interval range; And equaling this pre-determined number and this maximal value not in this first interval range or this second interval range the time when this count parameter, this first red component, this first green component and this first blue component carry out this format conversion process and obtain this color-values.
Wherein, this compensation process comprises: judge that this maximal value is in this first interval range or this second interval range; When this maximal value is in this first interval range; This first red component, this first green component and this first blue component reduce by one first predetermined value respectively and export this second red component, this second green component and this second blue component, wherein this first predetermined value be less than or equal to this peaked 8 percent; When this maximal value is in this second interval range, judge to have or not to receive a quantity parameter; When this maximal value in this second interval range and when not receiving this quantity parameter; This maximal value adds one second predetermined value and exports this second red component, this second green component and this second blue component, wherein this second predetermined value be less than or equal to this peaked 8 percent; When this maximal value in this second interval range; When receiving this quantity parameter and this first red component and equaling this first green component; This first red component adds metric five and export this second red component; This first green component adds metric five and export this second green component, and this first blue component equals this second blue component; And work as this maximal value in this second interval range; When receiving this quantity parameter and this first red component and equaling this first green component; This first red component adds metric seven and export this second red component; This first green component adds metric five and export this second green component, and this first blue component equals this second blue component.
Wherein, After judging that this maximal value is whether in this first interval range or this second interval range; The glow color decision method of light emitting diode more can comprise: judge that this maximal value is in one the 3rd interval range or one the 4th interval range; Wherein the 3rd interval range is more than or equal to 0x00 and less than 0x47, and the 4th interval range is greater than 0x4c and is less than or equal to 0xF2; When this maximal value is in the 3rd interval range, export a failure signal; And when this maximal value is in the 4th interval range; This first red component, this first green component and this first blue component carry out this format conversion process and obtain this color-values, and judge that this color-values is whether in this desired extent and export this consequential signal.
According to the glow color decision method of the light emitting diode that the present invention disclosed, can correctly judge the probability of glow color in order to improve light-emitting diode detection device.Through adjusting suitable area parameters and time parameter, to avoid the too big or too little erroneous judgement that causes light-emitting diode detection device of brightness because of light.Can will make through compensation process and carry out color-values that the format conversion process exports more near desired extent, so that improve the judgement of glow color.
Describe the present invention below in conjunction with accompanying drawing and specific embodiment, but not as to qualification of the present invention.
Description of drawings
Fig. 1 is an example structure synoptic diagram of the light-emitting diode detection device of the glow color decision method of the application light emitting diode that the present invention disclosed.
Fig. 2 is the first embodiment schematic flow sheet according to the glow color decision method of the light emitting diode that the present invention disclosed.
Fig. 3 is the compensation process one embodiment schematic flow sheet according to the step 208 of Fig. 2.
Fig. 4 is the second embodiment schematic flow sheet according to the glow color decision method of the light emitting diode that the present invention disclosed.
Fig. 5 is the 3rd an embodiment schematic flow sheet according to the glow color decision method of the light emitting diode that the present invention disclosed.
Wherein, Reference numeral:
50: light emitting diode
100: light-emitting diode detection device
102: LED socket
104: sensitive element
106: optical fiber
108: controller
Embodiment
Please with reference to Fig. 1, be an example structure synoptic diagram of the light-emitting diode detection device of the glow color decision method of using the light emitting diode that the present invention disclosed.In the present embodiment, light-emitting diode detection device 100 includes at least one LED socket 102, at least one sensitive element 104, at least one optical fiber 106 and controller 108.Wherein LED socket 102 is in order to grafting light emitting diode 50, and controller 108 is electrically connected to LED socket 102 with sensitive element 104 and in order to control light emitting diode 50 and sensitive element 104.The light that light emitting diode 50 sent (not indicating) is received and sensing by sensitive element 104 through optical fiber 106.
Please with reference to Fig. 1 and Fig. 2, Fig. 2 is the first embodiment schematic flow sheet according to the glow color decision method of the light emitting diode that the present invention disclosed.The glow color decision method of light emitting diode comprises:
Step 202: set the photosensitive area of sensitive element and the time that photosensitive area receives light with area parameters and time parameter;
Step 204: receive light through sensitive element and obtain first red component, first green component and first blue component;
Step 206: the size of first red component, first green component and first blue component and obtain maximal value relatively;
Step 208: judge maximal value whether in first interval range or second interval range, wherein first interval range is greater than hexadecimal 0xF2, and second interval range is for more than or equal to hexadecimal 0x47 and be less than or equal to hexadecimal 0x4c;
Step 210: when maximal value is in first interval range or second interval range, compensates process and export second red component, second green component and second blue component;
Step 212: second red component, second green component and second blue component are carried out the format conversion process and obtain color-values; And
Step 214: judge that color-values is whether in desired extent and output result signal.
In the above-mentioned steps 202, controller 108 is set the photosensitive area of sensitive element 104 with area parameters, wherein photosensitive area can be but be not limited to whole photosensitive area 50, percent 75 25 percent, percent or absolutely.Controller 108 time parameters can be in order to set the time of light that above-mentioned photosensitive area receives; Wherein the time of light that photosensitive area receives can be but is not limited to 3 rank, 5 rank, 7 rank, 9 rank, 11 rank or 13 rank; Each rank can be but is not limited to 0.001 second, but present embodiment is not in order to limit the present invention.Be noted that area parameters is relevant with the light that the setting and the light emitting diode 50 of time parameter are sent.For example, the brightness of ruddiness is less, and the required photosensitive area of sensitive element 104 is bigger, and the time of light that photosensitive area receives is longer; The brightness of green glow is bigger, and the required photosensitive area of sensitive element 104 is less, and the time of light that photosensitive area receives is shorter.
In step 204, sensitive element 104 utilizes photosensitive area and the time set to receive light and obtain first red component, first green component and first blue component.Be noted that; The scope of first red component can be but is not limited to hexadecimal 0x00 to 0xFF (being metric 0 to 255); The scope of first green component can be but is not limited to hexadecimal 0x00 to 0xFF; The scope of first blue component can be but is not limited to hexadecimal 0x00 to 0xFF, and the first actual red component, first green component are relevant with the light that first blue component system and actual sensitive element 104 sensing light emitting diodes 50 are sent.
Please with reference to Fig. 1 and Fig. 3, Fig. 3 is the embodiment schematic flow sheet according to compensation process in the step 210 of Fig. 2.Compensation process comprises:
Step 302: judge that maximal value is in first interval range or second interval range;
Step 304: when maximal value is in first interval range; First red component, first green component and first blue component reduce by first predetermined value respectively and export second red component, second green component and second blue component, and wherein first predetermined value is less than or equal to peaked 8 percent;
Step 306: when maximal value is in second interval range, judge to have or not the received quantity parameter;
Step 308: when maximal value in second interval range and not during the received quantity parameter; Maximal value adds second predetermined value and exports second red component, second green component and second blue component that wherein second predetermined value is less than or equal to peaked 8 percent;
Step 310:, judge whether the size of first red component equals the size of first green component when maximal value in second interval range and during the received quantity parameter;
Step 312: when maximal value in second interval range; When the received quantity parameter and first red component are not equal to first green component; First red component adds metric five and export second red component; First green component adds metric five and export second green component, and first blue component equals second blue component; And
Step 314: when maximal value in second interval range; When the received quantity parameter and first red component equal first green component; First red component adds metric seven and export second red component; First green component adds metric five and export second green component, and first blue component equals second blue component.
First predetermined value of above-mentioned steps 304 can be but is not limited to metricly 16, can adjust according to actual demand.Be noted that, when first predetermined value is big more, represent second red component, second green component and second blue component more little, that is to say that the brightness of light diminishes.In other words; (promptly first red component, first green component and first blue component are bigger in first interval range owing to maximal value; Represent the brightness of light bigger), the big erroneous judgement that possibly cause sensitive element 104 of brightness is so utilize first red component, first green component and first blue component to reduce the mode (being the adjustment of GTG) of first default value simultaneously; Can brightness be diminished to reduce the probability of erroneous judgement on the one hand, can not influence measurement result on the other hand.
The brightness that above-mentioned steps 308 is applicable to light is the monochromatic light (promptly not accepting the quantity parameter) of dark (being that maximal value is in second interval range), such as but not limited to ruddiness, green glow or blue light.Can add second predetermined value respectively through first red component, first green component and first blue component, the brightness that increases light on the one hand can not influence measurement result on the other hand to reduce the probability of erroneous judgement.The second above-mentioned predetermined value can be but is not limited to metricly five, can adjust according to actual demand.
The brightness that above-mentioned steps 312 and step 314 are applicable to light is the bi-coloured light of dark (being that maximal value is in second interval range) (promptly accept the quantity parameter, just be made up of the second colors in red, green and the blueness), such as but not limited to amber.For example, when light when being amber, need judge earlier first red component and first green component whether identical (being step 310).When first red component and first green component execution in step 312 simultaneously not, execution in step 314 when first red component is identical with first green component, but present embodiment is not in order to limit the present invention.
In step 212, the format conversion process obtains color-values for utilizing second red component, second green component and second blue component through HSB formula conversion back, and color-values can be zero to 360 deg.Wherein, the HSB formula is following:
Wherein, H is a color-values, and r is second red component; G is second green component; B is second blue component, and max is the maximal value in second red component, second green component and second blue component, and min is the minimum value in second red component, second green component and second blue component.That is to say that when second red component, second green component equal minimum value when (promptly second red component, second green component equate with second blue component, i.e. coincidence formula (1)) with maximal value in second blue component, color-values is a zero degree.When the maximal value in second red component, second green component and second blue component be second red component and second green component greater than and when equaling second blue component, color-values meets above-mentioned formula (2).When the maximal value in second red component, second green component and second blue component is second red component and second green component during less than second blue component, color-values meets above-mentioned formula (3).When the maximal value in second red component, second green component and second blue component was second green component, color-values met above-mentioned formula (4).When the maximal value in second red component, second green component and second blue component was second blue component, color-values met above-mentioned formula (5).
Above-mentioned steps 214 described desired extents are the color-values scope of solid color; For example; Redness can be but is not limited to zero degree to ten two degree to be spent to 360 deg (360 deg is zero degree) with 330, and green can be but is not limited to 90 degree to 150 degree, and blueness can be but is not limited to 210 degree to two degrees; Amberly can be but be not limited to the scope of 13 degree to 60 degree, but present embodiment is not in order to limit the present invention.The consequential signal of output can be into function signal (light emitting diode 50 is qualified) when color-values is in desired extent, and the consequential signal of output can be failure signal (light emitting diode 50 is defective) when color-values is in desired extent.The way of output of consequential signal can be but is not limited to utilize light-emitting diode detection device 100 external display units (not drawing) to show.That is to say that the way of output of consequential signal also can be utilizes light-emitting diode detection device 100 external voice unit (VU)s (not drawing) to carry out the prompting of sound.Be noted that desired extent is the scope that promptly configures before light-emitting diode detection device 100 is measured.
Please with reference to Fig. 1 and Fig. 4, Fig. 4 is the second embodiment schematic flow sheet according to the glow color decision method of the light emitting diode that the present invention disclosed.The glow color decision method of the light emitting diode of present embodiment more can comprise except the flow process of above-mentioned first embodiment:
Step 402: when maximal value is not in first interval range or second interval range, receiving area parameter and time parameter again;
Step 404: when receiving area parameter and time parameter again, increase the size of count parameter;
Step 406: judge that count parameter is less than or equal to pre-determined number;
Step 408:, judge that maximal value is whether in first interval range or second interval range when count parameter during less than pre-determined number;
Step 410: when count parameter when pre-determined number and maximal value are in first interval range or second interval range, maximal value compensates process and exports second red component, second green component and second blue component;
Step 412: when count parameter equals pre-determined number, judge that maximal value is whether in first interval range or second interval range; And
Step 414: when count parameter equals pre-determined number and maximal value not in first interval range or second interval range time, first red component, first green component and first blue component carry out the format conversion process and obtain color-values.
The initial value of above-mentioned steps 402 and the described count parameter of step 404 can be but is not limited to zero, when receiving area parameter and time parameter again, can count parameter be increased by one, but present embodiment is not in order to qualification the present invention.Above-mentioned steps 406 described pre-determined numbers can be but are not limited to the product of the quantity of the quantity of all area parameters that configure and the time parameter that all configure.In other words, when maximal value was not in first interval range or second interval range, light-emitting diode detection device 100 can receive new area parameters and time parameter always again.After the light that light-emitting diode detection device 100 parameter that all are available is sent light emitting diode 50 is measured; The maximal value that controller 108 is obtained is not still in first interval range or second interval range time, and controller 108 carries out first red component, first green component and first blue component format conversion process and obtains color-values.
Please with reference to Fig. 1 and Fig. 5, Fig. 5 is the 3rd an embodiment schematic flow sheet according to the glow color decision method of the light emitting diode that the present invention disclosed.The glow color decision method of the light emitting diode of present embodiment is except the flow process of above-mentioned first embodiment; Judging maximal value whether in first interval range or second interval range after (being step 208), the glow color decision method of light emitting diode more can comprise:
Step 502: judge maximal value in the 3rd interval range or the 4th scope, wherein the 3rd interval range is more than or equal to 0x00 and less than 0x47, and the 4th interval range is greater than 0x4c and is less than or equal to 0xF2;
Step 504: when maximal value is in the 3rd interval range, the output failure signal; And
Step 506: when maximal value was in the 4th interval range, first red component, first green component and first blue component carried out the format conversion process and obtain color-values, and judged that color-values is whether in desired extent and output result signal.
In step 504, because maximal value is when the 3rd interval range, almost sensing is less than the brightness of light for sensitive element 104, and therefore not needing to carry out any step can judge that light emitting diode 50 is defective again, to reduce the test duration.
In step 506; Because maximal value is when the 4th interval range; Sensitive element 104 can be correct the state that senses light, therefore can directly first red component, first green component and first blue component be carried out the format conversion process and judge that color-values is whether in desired extent.
The foregoing description is that light-emitting diode detection device 100 can be sought suitable area parameters and time parameter in all area parameters and time parameter; Avoiding the too big or too little erroneous judgement that causes light-emitting diode detection device 100 of brightness because of light, but present embodiment is not in order to limit the present invention.That is to say; Before execution in step 202; Area parameters and the time parameter that can preset many groups earlier carry out determination flow afterwards, and wherein the area parameters and the time parameters of many groups meet the condition that can correctly judge most of light emitting diode emitted lights, with the time that avoids waste and judge.
According to the glow color decision method of the light emitting diode that the present invention disclosed, can correctly judge the probability of glow color in order to improve light-emitting diode detection device.Through adjusting suitable area parameters and time parameter,, wherein can preset the area parameters of many groups and the time that time parameter avoids waste and judges earlier to avoid the too big or too little erroneous judgement that causes light-emitting diode detection device of brightness because of light.When the brightness of light can't utilize area parameters and time parameter to be adjusted to preferable sensing result (being that maximal value is in first interval range or in second interval range); Can brightness or first red component in the light, first green component and first blue component of light be adjusted through compensation process; Make the color-values of carrying out the format conversion process and exporting more near desired extent, so that improve the judgement of glow color.When maximal value is in the 3rd interval range, the exportable failure signal of light-emitting diode detection device, and do not need to carry out again any step to reduce the test duration.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of claim of the present invention.
Claims (4)
1. the glow color decision method of a light emitting diode is characterized in that, comprising:
With a photosensitive area of an area parameter and a time parameter setting one sensitive element and the time that this photosensitive area receives a light;
Receive this light through this sensitive element and obtain one first red component, one first green component and one first blue component;
The size of this first red component, this first green component and this first blue component and obtain a maximal value relatively;
Judge this maximal value whether in one first interval range or one second interval range, wherein this first interval range is greater than hexadecimal 0xF2, and this second interval range is for more than or equal to hexadecimal 0x47 and be less than or equal to hexadecimal 0x4c;
When this maximal value is in this first interval range or this second interval range, carries out a compensation process and export one second red component, one second green component and one second blue component;
This second red component, this second green component and this second blue component are carried out a format conversion process and obtain a color-values; And
Judge that this color-values is whether in a desired extent and export a consequential signal.
2. the glow color decision method of light emitting diode according to claim 1; It is characterized in that; Judging this maximal value whether after the step in this first interval range or this second interval range, the glow color decision method of this light emitting diode more comprises:
When this maximal value is not in this first interval range or this second interval range, receive this area parameters and this time parameter again;
When receiving this area parameters and this time parameter again, increase the size of a count parameter;
Judge that this count parameter is less than or equal to a pre-determined number;
When this count parameter during, judge that this maximal value is whether in this first interval range or this second interval range less than this pre-determined number;
When this count parameter when this pre-determined number and this maximal value are in this first interval range or this second interval range, this maximal value is carried out this compensation process and is exported this second red component, this second green component and this second blue component;
When this count parameter equals this pre-determined number, judge that this maximal value is whether in this first interval range or this second interval range; And
When this count parameter equals this pre-determined number and this maximal value not in this first interval range or this second interval range the time, this first red component, this first green component and this first blue component carry out this format conversion process and obtain this color-values.
3. the glow color decision method of light emitting diode according to claim 1 is characterized in that, this compensation process comprises:
Judge that this maximal value is in this first interval range or this second interval range;
When this maximal value is in this first interval range; This first red component, this first green component and this first blue component reduce by one first predetermined value respectively and export this second red component, this second green component and this second blue component, wherein this first predetermined value be less than or equal to this peaked 8 percent;
When this maximal value is in this second interval range, judge to have or not to receive a quantity parameter;
When this maximal value in this second interval range and when not receiving this quantity parameter; This maximal value adds one second predetermined value and exports this second red component, this second green component and this second blue component, wherein this second predetermined value be less than or equal to this peaked 8 percent;
When this maximal value in this second interval range; When receiving this quantity parameter and this first red component and equaling this first green component; This first red component adds metric five and export this second red component; This first green component adds metric five and export this second green component, and this first blue component equals this second blue component; And
When this maximal value in this second interval range; When receiving this quantity parameter and this first red component and equaling this first green component; This first red component adds metric seven and export this second red component; This first green component adds metric five and export this second green component, and this first blue component equals this second blue component.
4. the glow color decision method of light emitting diode according to claim 1 is characterized in that, after judging that this maximal value is whether in this first interval range or this second interval range, the glow color decision method of light emitting diode more can comprise:
Judge this maximal value in one the 3rd interval range or one the 4th interval range, wherein the 3rd interval range is more than or equal to 0x00 and less than 0x47, and the 4th interval range is greater than 0x4c and is less than or equal to 0xF2;
When this maximal value is in the 3rd interval range, export a failure signal; And
When this maximal value is in the 4th interval range; This first red component, this first green component and this first blue component carry out this format conversion process and obtain this color-values, and judge that this color-values is whether in this desired extent and export this consequential signal.
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| US20080054818A1 (en) * | 2006-08-31 | 2008-03-06 | Park Seong Soo | Light Device and Control Method Thereof |
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|---|---|---|---|---|
| DE202004006019U1 (en) * | 2004-04-16 | 2004-06-09 | GPS Prüftechnik mbH | Testing arrangement for light emitting diodes tests brightness and color by determining brightness and color signal using video camera and providing the signal to PC for processing |
| US20080054818A1 (en) * | 2006-08-31 | 2008-03-06 | Park Seong Soo | Light Device and Control Method Thereof |
| CN101471050A (en) * | 2007-12-27 | 2009-07-01 | 财团法人工业技术研究院 | System and method for stabilizing wavelength of led radiation in backlight module |
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