An RGB Solution
In practice, the user needs to specify both the desired color and intensity. This can be done using CIE xyY values, where xy represent the CIE 1931 chromaticity coordinates, and Y represents the intensity. This approach is, however, not as intuitive as the RGB settings most lighting designers are familiar with.
Fortunately, there is a simple solution. Referring to the six-color LED module color gamut shown, we can completely enclose the six-sided color gamut in a triangle defined by the xy chromaticities of virtual red, green, and blue LEDs. It does not matter that the red LED chromaticity lies outside the horseshoe-shaped spectral locus and so represents a physically impossible color. What does matter is that the RGB values can be used to represent any color (and intensity) within the six-color LED module color gamut.
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Relative spectral response: Closely matches CIE Standard Observer curves x,y,z within 6% (fi') of the CIE
spectral luminous efficency V(lambda)
Cosine response (f2) EV: Within 3%
Receptor: Silicon photocell
Measuring function Tristimulus values: XYZ
Chromaticity: vay; Ev u'v'; Ev, Dominant wavelength, Excitation purity
Correlated color temperature: EVTCpA u’v’; TCp(JIS method; available only with CL-S10w)
Color difference: delta(XYZ), delta(vay), delta(Evu'v'), deltaEVAu'v'
Other function: User calibration function, Data hold function, Mufti-point measurement (2 to 30 points)
Measuring range: 0.1 to 99,990 lx, 0.01 to 9,999 fcd (Chromaticity: 5 lx, 0.5 fcd or above) in four
automatically selected ranges (lx or fcd is switchable)
Accuracy: EV (Linearity): i2%i1digit of displayed value xy: 3:0.002
Repeatability: Ev: 0.5%+1digit (2zetta); xy: $0.0005
Temperature drift: Ev: +/-3% zidigit of displayed value, xy: +/-0.003
Humidity drift: Ev: +/-3% i1digit of displayed value, xy: +/-0.003
Response time: 0.5 sec. (continuous measurement)
Computer interface: USB
Display: 2-significant-digit LCD with back-light illumination
Operating temperature: -10 to 40°C, relative humidity 85% or less (at 35°C) with no condensation
humidity range
Storage temperature: -20 to 55°C, relative humidity 85% or less (at 35°C) with no condensation humidity
range
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TCS3103 LIGHT-TO-VOLTAGE Three-Channel RGB Color Sensor
_ Converts Light Intensity to Voltage
_ Single-Voltage Supply Operation —4.5 V to 5.5 V
_ Rail-to-Rail Output_ Programmable gain settings:− TCS3103 (2_, 4_)
_ Low Supply Current —270 uA Typical
_ Fast Response Time — Rise Time = 12 us Typical
_ Low Dark Offset
Electrical Characteristics
ReR Irradiance responsivity, VOR: λp = 470 nm - 0.025V/(μW/cm2); λp = 524 nm -
0.095V/(μW/cm2); λp = 640 nm - 0.3 - 0.4 - 0.5V/(μW/cm2)
ReG Irradiance responsivity, VOG: λp = 470 nm - 0.13/(μW/cm2); λp = 524 nm -0.18 - 0.25 -
0.31mV/(μW/cm2); λp = 640 nm - 0.06/(μW/cm2)
ReB Irradiance responsivity, VOB: λp = 470 nm - 0.15 0.2 0.25/(μW/cm2); λp = 524 nm -
0.13/(μW/cm2); λp = 640 nm - 0.12/(μW/cm2)
Gain scaling, 1× to 2× 1.9 2 2.1
Gain scaling, 1× to 4× 3.8 4 4.2
More details in Datasheet.
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System has the independent and common reset for current dynamic range. Also LEDs are shows the intensity of the particular channel diapason acquisition by PWM sensor control. Common LAD shows the 50% of common five sensor’s intensity threshold. Due the amplification the TCS3103 sensor can be remote from the port for up to a meter with regular ribon cable connection.
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