The present standard for LED display of machinery, optical, electrical and other major technology performance levels and provides for testing.
The present standard applicable to all types of LED displays (the display) test.

The following documents through the terms of reference of this standard and become the standard terms. Note the date of any reference document for all subsequent amendments to a single (not including the contents of errata) or revised edition of the standards are not applicable to the present, however, under this standard to encourage the parties to reach an agreement to study the possibility of using the latest version of these documents. Note the date of which are not in the documents cited, the latest version of the application of this standard.
GB / T 4208-1993 electrical and electronic products, standards protective shell
SJ / T 11141-2003 LED display common norms

According to test results, the indicator is divided into three grades.
3.1 A-level
Display should meet the basic indicators.
Grade B
A level higher than the index.
3.3 C
A level higher than the targets and B-class.
4 General requirements
4.1 Test conditions
In addition to the special requirements, environmental testing are as follows:
Ambient temperature: 15 ℃ ~ 35 ℃
Relative Humidity: 40% to 80%
Atmospheric pressure: 86kpa ~ 106kpa
Power supply: 220V (1 ± 10%), 50 Hz ± 1HZ
Test instrumentation and software
Color TV signal generator: S / N more than 52dB;
Color Analyzer: Precision than ± 5% (used to measure the brightness, color, and other optical properties of similar equipment could be)
Vernier caliper: resolution of 0.02mm
Protractor: accuracy of 2 °;
Thermometer: accuracy of ± 1 ℃;
Light instrument: accuracy greater than ± 10%
According to meter: accuracy greater than ± 10%
Oscilloscope: 100 MHz
Gang Chi: the length of more than 1m

Plug: Precision than 1 / 100 mm
Brightness testing to identify software:
A total of 24, such as poor gray vertical stripes, each and every one of vertical stripes with a width of 24, the color white stripes. Each pressed about "←
Key to test the left fringe 24; each pressed about "→" key test shifted to right fringe 24.
Gray-scale testing software:
Red, green, blue the 256 level, the equality of difference; "R" key, "G" key, "B" key to control the choice of colors, each pressed
Click "↑" button, the selected color of an increase in the level of brightness; each pressed about "↓" button, the selected color brightness of a lower level.
Frame rate testing software:
In the display window to open within four regions A1, A2, A3 and A4. The first picture frame in the region A1 within a show "●"; in the second frame in the region A2 in screen shows a "■"; in the third frame in the regional A3 screen display a "▲"; fourth at the regional picture frame with A4 Show a "★". More than four pictures for a group from the beginning of the fifth frame the law of this cycle show.

Mechanical Properties
5.1.1 protective shell level
a) request
Table 1: hierarchy casing protection
A Class B Class C Class
Indoor IP30> F ≥ IP20 IP31> F ≥ IP30 F ≥ IP31
Outdoor IP54> F ≥ IP33 IP66> F ≥ IP54 F ≥ IP66

b) protection level test case
In accordance with the provisions of GB4208-93 method. And Table 1, into a different level.
5.1.2 module assembly precision
5.1.2.1 flatness
a) definition
Any screen within the framework of the inter-pixel Bump deviation P.
b) request
Table 2: flatness in mm
A B C
1.5 <P ≤ 2.5 0.5 <P ≤ 1.5 P ≤ 0.5

c) Measurement
1m long Gangchi will be placed in the side of the screen surface anywhere on the screen, side by side with the regulatory measurement Gangchi display screen face the biggest gap between the p, and Table 2, included in the corresponding level.
5.1.2.2 pixels relative deviation from the center
a) definition
Arbitrary adjacent pixels between the measured and nominal center distance from the center of the relative error JX.
b) request
Table 3: the relative deviation from the center pixel
A Class B Class C Class
10% <JX ≤ 15% 5% <JX ≤ 10% JX ≤ 5%


c) Measurement
With an accuracy of 0.02mm general-purpose measuring measuring, and then press-calculated, and Table 3, into a different level.
JX = │ ZC - ZB │ / 30lg (ZB / 2) ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... (1)
Where:
JX for the relative deviation from the center pixels (JX ≤ 15%);
ZC as measured from the center pixel
ZB for the nominal pixel Center
5.1.2.3 the relative level of dislocation
a) definition
Display in the horizontal direction of the adjacent module to form up and down the wrong pixels, known as the relative level of dislocation CS.
b) request
Table 4: the relative level of dislocation
A Class B Class C Class
10% <CS ≤ 15% 5% <CS ≤ 10% CS ≤ 5%

c) Measurement
By resolution of 0.02mm for the common measurement of measuring, and then press-calculated, and Table 4 provides into different levels.
CS = DSC / 30lg (ZB / 2) ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... (2)
Where:
CS relative to the level of dislocation (CS ≤ 15%);
DSC measured for levels of the value of dislocation
ZB away from the center for megapixels nominal
5.1.2.4 vertical dislocation relative
a) definition
Display in the vertical direction of the adjacent blocks of pixels around the wrong form, known as the vertical dislocation relative CC.
b) request
Table 5: vertical accuracy of dislocation
A Class B Class C Class
10% <CC ≤ 15% 5% <CC ≤ 10% CC ≤ 5%

c) vertical dislocation CC precision measurement
By resolution of 0.02mm for the common measurement of measuring, and then press-calculated, and Table 5, into a different level.
CC = DCC / 30lg (ZB / 2) ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... (3)
Where:
CC dislocation relative to the vertical (CC ≤ 15%);
DCC is the value measured dislocation vertical
ZB away from the center for megapixels nominal

5.2.1 maximum brightness
a) definition
Display a certain illumination environment, the highest in the gray level and the highest brightness level measured brightness B.
b) Measurement
1) Measurement conditions:

━ ━ environmental changes in the illumination of less than ± 10%.
━ ━ measuring not less than 16 regions adjacent pixels.
2) Measurement:
━ ━ all-black screen, the color analyzer display measuring the brightness of the background of the BD.
━ ━ screen brightness at the highest level, the highest-level gray, the color analyzer measuring the maximum brightness of the display BMAX.
━ ━ actual maximum brightness: B = BMAX - BD.
━ ━ of the above methods were used on-demand measurement of red, green, blue, yellow, white (white balance in the circumstances), the largest of the brightness.
5.2.2 Perspective
a) definition
The assumption that light-emitting display pixel brightness of the normal direction for the BF, from the left and right display screen brightness detection, when the brightness value of the left and right down to BF / 2, the line between the two observations constitute an angle θS ( θS <180 °), we referred to as horizontal display view. From top to bottom on both sides of the display screen brightness detection, when the brightness up and down both sides of the decline in the value of the BF / 2, two observations constitute the angle between the line θC (θC <180 °) what we call vertical display Perspective.
b) angle measurement
1) Measurement conditions:
━ ━ environmental changes in the illumination of less than ± 10%, do not apparent colored light source.
━ ━ optical probe scope of the acquisition shall be not less than 16 adjacent pixels.
2) measuring the level of perspective:
━ ━ full-screen display shows a color box (the highest brightness level, the highest-level gray).
━ ━ color analyzer to measure box in the direction of normal brightness of the LF.
━ ━ to display center for dot-block, in the same radius of rotation, along the horizontal direction to the left and right respectively to
Dynamic Color Analyzer (probe at the center-block), when the brightness value dropped to LB = LF / 2 when Liangchu line between the two observation
Angle θSX.
━ ━ Liangchu the same way every color of the level of perspective, check the display is the minimum level of perspective θS.
3) vertical angle measurement:
━ ━ full-screen in the Central Bank show a 32 out × 16 single-color box (the highest brightness level, the highest-level gray).
━ ━ rest of the steps and the level of the basic methods of measuring the angle is the same as the color analyzer in a different direction of rotation (if conditions permit, it can rotate the screen to measure the way).
━ ━ by the same method of measuring the color of each of the vertical angle, the screen is taking the minimum vertical angle θC.
5.2.3 the highest contrast ratio
a) definition
Display some of the environmental illumination, the largest of its brightness with the brightness of the background of more than C.
b) Measurement
1) Measurement conditions:
━ ━ indoor display screen surface normal direction for the illumination of 100 × (1 ± 10%) lx.
━ ━ outdoor display screen surface normal direction for the illumination of 10000 × (1 ± 10%) lx.
━ ━ measuring not less than 16 regions adjacent pixels.
2) Measurement:
━ ━ 5.2.1 in accordance with the greatest brightness measurements were measured approach BMAX and BD.
━ ━ press-calculated contrast C.
C = (BMAX - BD) / BD ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... (4)
5.2.4 at the main color Errors
a) definition


The main screen color wavelengths and the actual value of the nominal value of the error △ λD.
b) request
Table 6: Main color nanometer wavelength error for the unit
A Class B Class C Class
10 <△ λD ≤ 15 5 <△ λD ≤ 10 △ λD ≤ 5

c) Measurement
1) Measurement conditions:
━ ━ environmental changes in the illumination of less than 10 lx.
━ ━ does not allow the existence of colored light around.
━ ━ optical probe scope of the acquisition of not less than 16 adjacent pixels.
2) Measurement:
━ ━ color analyzer, respectively measuring red, green, blue and other colors of the color coordinates of the goods.
━ ━ goods according to their color coordinates, in the color chart to find out the color of the dominant wavelength.
━ ━ calculated and measured wavelength of the main nominal wavelength of the main difference, which is taking the maximum wavelength of color error ΔλD.
━ ━ according to Table 6, under the appropriate level.
5.2.5 white color coordinates of the field
a) definition
Three color components of the full color display screen in the white field, corresponding to the CIE 1931 color map of X, Y coordinates.
b) request
According to the International Commission on Illumination (CIE) 1931 color map, the color temperature to 6500K-9500K white paper as the center field color coordinates
范围.
Table 7: white color coordinates of the field area
X Coordinate 0.28 0.47 0.37 0.33
Y coordinates 0.25 0.30 0.33 0.37

c) Measurement
1) Measurement conditions:
━ ━ environmental changes in the illumination of less than ± 10%, do not apparent colored light source.
━ ━ optical probe scope of the acquisition shall be not less than 16 adjacent pixels.
2) Measurement:
━ ━ gray at the highest level and the highest brightness level, all-white image display screen.
━ ━ color analyzer for white color coordinates of the field measurements.
━ ━ should be included in the table 7.
5.2.6 Identification of brightness level
a) definition
The human eye can differentiate the image from the black to white between the brightness level of BJ.
b) request
Table 8: Identification of brightness level
A Class B Class C Class
8 ≤ BJ <12 12 ≤ BJ <20 BJ ≥ 20



c) Measurement
1) Measurement conditions:
━ ━ indoor environment illumination for the screen (100 ± 10%) lx.
━ ━ room illumination environment for the external screen (10000 ± 10%) lx.
━ ━ vote were observed at five.
2) Measurement:
━ ━ light to start testing to identify software. (A total of 24, such as poor gray vertical stripes, vertical stripes each and every one of the width of not less
At 24, the color white stripes. Each pressed about "←" button to test the left fringe 24; each pressed about "→ key test shifted to right fringe 24.).
━ ━ observer standing on display from 5-8 times the width of the far (in front of the display is).
━ ━ rather than pressing the "←" button or "→" key, making the most of the test card dark stripes and a shaft alignment on the left screen. Then, with
A few visual method of the human eye can distinguish between a number of fringe T1. At this point is to identify the brightness level of T = T1.
━ ━ if not at the same time a screen display 24 vertical stripes, rather than pressing the "←" key, the left vertical stripe card test, so that the stripes in the first frame to test the software on the right side stripes moved to the left show To the left of the screen. Then, with a few visual method to distinguish the human eye
A few stripes T2. At this point is to identify the brightness level of BJ = T1 + (T2-1).
━ ━ 2 screen if not at the same time show 24 vertical stripes, then pressed to continue "←" key, the left vertical stripes test software so that the stripes in the second frame to test the software on the right side stripes moved to the left To the left of the screen. Then, with a few visual method of the human eye can distinguish between a number of fringe T3. At this point is to identify the brightness level of BJ = T1 + (T2-1) + (T3-1). Followed by analogy, until 24 vertical stripes all appeared so far.
━ ━ 5 to observe the results of the vote, to remove a maximum points and minimum hours in the middle of the three will be the result of combined and in addition to 3, is the ultimate level of brightness to identify.
━ ━ according to Table 8, under the appropriate level.
5.2.7 uniformity
5.2.7.1 pixel light uniformity
a) definition
In particular, display some of the brightest pixels (or dark pixels) and the light intensity of the pixels associated with the region pixel light of the consistency of BPJ.
Delineation of the regional association are as follows:
☆ ☆ ☆
☆ ★ ☆ ★ pixels Center
☆ ☆ ☆ ☆ associated with pixels
b) request
Table 9: pixel light uniformity
A Class B Class C Class
25% <BPJ ≤ 50% 5% <BPJ ≤ 25% BPJ ≤ 5%

d) Measurement
━ ━ measurements were all normal means the pixel light intensity.
━ ━ in full-screen in randomly selected 20 pixels.
━ ━ strong instrument used to measure this difference of 20 pixels of light intensity values, and to elect one of the best 3-megapixel and 3 of the most dark pixels, the numbers were P1, P2, P3, P4, P5, and P6. Their light intensity value I0 (P1), I0 (P2), I0 (P3), I0 (P4), I0 (P5), and I0 (P6)
━ ━, by definition, strong instrument used to measure each pixel P1 associated with the region around the pixel light intensity I1 (P1), I2 (P1), ┉ I8 (P1) and under-calculate the associated P1 region pixel light uniformity B [P1].

| I0 (P1)-Ii (P1) |
B [P1 (i)] =
I0 (P1) + Ii (P1)
× 100% ... ... ... ... ... ... ... ... ... ... ... ... ... ... (5)



　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

Where:
i = 1 ~ 8
━ ━ 8 from the value associated with the largest check in as a pixel P1 uniform light intensity value B [P1] max.
━ ━ with the same method were detected P2, P3, P4, P5 and P6 uniformity of light, taking three for the maximum arithmetic average, calculated
Pixel light uniformity BPJ.
━ ━ each color were measured terms, and to get the maximum screen pixel is the light uniformity, and Table 9, under the appropriate level.
5.2.7.2 module brightness uniformity
a) definition
Number of pixels show a structurally independent of the smallest units, called modules. Associated with the region's smallest unit between brightness uniformity, brightness Modules called uniformity BMJ. Zones associated with the pixels associated with the same zones.
b) request
Table 10: Module brightness uniformity
A Class B Class C Class
25% <BMJ ≤ 50% 10% <BMJ ≤ 30% BMJ ≤ 10%

c) Measurement
1) Measurement conditions:
━ ━ environmental changes in the illumination of less than ± 10%.
━ ━ optical probe scope of the acquisition of not less than 16 adjacent pixels.
2) Measurement:
━ ━ measurement in the process of observation on the screen line between the point of view are the same.
━ ━ gray at the highest maximum brightness, a full-screen color display graphics.
━ ━ in full-screen, using visual method to identify groups associated with 3 brightness poor region's largest display module, the number of J1, J2
And J3.
━ ━ color analyzer to measure the brightness of the display module J1 value B0 (J1).
━ ━ under section 5.2.7.1 be associated with the definition of the region, the color analyzer to measure the respective display module associated regional J1 show
The value of the module brightness B1 (J1), B2 (J1), ... ... B8 (J1). And the formula (5) calculate the associated regional J1 display
Module brightness uniformity B [J1] max.
━ ━ with the same method were detected J2 and J3 block matrix display brightness uniformity B [J2] max, B [J3] max.
━ ━ to B [J1] max, B [J2] max, B [J3] max carry out the arithmetic average, that is to be the full-screen color display module brightness uniformity.
━ ━ the same way, every color measurements were calculated.
━ ━ check is the maximum screen brightness display module uniformity BMJ, and 10, into the corresponding level.
5.2.7.3 module brightness uniformity
a) definition
By the number of display module, the drive circuit, control circuit and the corresponding pieces of the structure constitutes a separate display units, called modules. The module associated with the region between the brightness uniformity, brightness Modules called uniformity BGJ. Zones associated with the pixels associated with the same zones.
b) request
Table 11: Module brightness uniformity
A Class B Class C Class
10% <BGJ ≤ 20% 5% <BGJ ≤ 10% BGJ ≤ 5%

c) Measurement
━ ━ measurement, measurement, calculation and so on, with uniform brightness display module of the same measurement.
━ ━ according to table 11, into the corresponding level.

5.3.1-for-frame frequency
a) definition
Screen update frequency of FH.
b) request
Table 12: Frame-for-frequency unit Hertz
A Class B Class C Class
FH <25 25 <FH ≤ 50 FH ≥ 50

c) Measurement
━ ━ frame rate to start testing the software, and on the screen to open the four regions A1, A2, A3 and A4. The first picture frame in the display area A1
A "●"; in the second frame in the region A2 in screen shows a "■"; in the third frame in the regional A3 screen display a "▲"
The fourth picture frame A4 in the region within a show "★". More than four pictures for a group from the beginning of the fifth frame the law of this cycle show.
━ ━ on the screen test showed that the software, if the display in the four regions have complete graphics, frame-for-frequency FH computer frame rate is equivalent to FF, that is, FH = FF.
━ ━ on the screen test showed that the software, if only to display in the region A1 and A3 in the region are full of graphics, or only in the region
A2 and A4 in the region with complete graphics, frame-for-FH frequency on the computer equivalent to half the frame rate, that is, FH = FF / 2.
━ ━ on the screen test showed that the software, if only to display in any region in the integrity of the graphics, frame-for-frequency FH is equivalent to a quarter of the computer frame rate, that is, FH = FF / 4.
━ ━ on the screen test showed that the software, if the display in all four regions in graphics, but graphics do not have been complete line of pumping out or pumping, the frequency of FH-for-frame on the computer equivalent to half the frame rate, that is, FH = FF / 2.
━ ━ oscilloscope used to measure frame rate computer FF, and in accordance with the above test results to calculate the frequency of frame-for-FH.
━ ━ According to Table 12, the indicator into the appropriate level.
5.3.2 refresh rate
a) definition
Kinds of data per second screen shows the number of times to be repeated FC.
b) request
Table 13: Hz refresh rate for the unit
A Class B Class C Class
150> FC ≥ 100 200> FC ≥ 150 FC ≥ 200

c) Measurement
━ ━ home screen brightness at the highest level, the gray-scale transformation for the purchase of a dual-color display for the combination of color, full color screen is white.
━ ━ oscilloscope used to observe any kind of non-pixel color LED driver current waveforms, and detect a drive current wave of the cycle T, then refresh rate FC = 1 / T.

SJ / T 11281 2003
━ ━ according to table 13, under the appropriate level.
5.3.3 duty cycle
a) definition
In the largest and the most gray-scale brightness level, any pixels in a scan cycle of on-time (TO) and scanning cycle (TS) ratio ZQ.
When ZQ ≥ 1, is defined as a static drive.
When ZQ <1, defined as a dynamic drive.
b) request
Usually drive duty cycle of 1 / 32, 1 / 16, 1 / 8, 1 / 4, 1 / 2 and 1, and so on.
c) the duty cycle test
Statistics ━ ━ out a display module driving circuit approach Q.
━ ━ a few display a few blocks of pixels X.
If ━ ━ color screen for a few JC.
━ ━ drive duty cycle ZQ = Q / (X × JC).
5.3.4 changes in the rate of load modules
a) definition
In the largest and highest brightness level gray-scale, full-bright display module and the local situation of the two light brightness changes in the rate of BL.
b) request
Table 14: Module load change rate
A Class B Class C Class
Static drive 9% <BL ≤ 15% 3% <BL ≤ 9% BL ≤ 3%
Dynamic Drive 20% <BL ≤ 35% 7% <BL ≤ 20% BL ≤ 7%

c) Measurement
1) Measurement conditions:
━ ━ environmental changes in the illumination rate of less than ± 10%.
━ ━ optical probe scope of the acquisition shall be not less than 16 adjacent pixels.
2) Measurement:
━ ━ in the black full-screen, color display analyzer measuring the brightness of the background of the BD.
━ ━ module to the 1 / 16 for box unit module will be divided into a number of regions, either as a regional test region.
━ ━ module at the highest brightness level, the highest level and throughout the gray light of the situation of the whole module, measuring the brightness of the module BQ.
━ ━ module will be tested at the highest brightness level, the highest-level gray, but the module is only one of the region-wide, measuring the brightness of the region BB.
━ ━ with under-calculated the rate of change in the brightness module:
BL = (BB-BQ) / (BB + BQ-2BD) × 100%
━ ━ use of the above methods were calculated measuring red, green, blue, yellow, white brightness changes in the rate, whichever is the maximum value modules load changes in the rate.
━ ━ according to the provisions of Table 14, under the appropriate level.
5.3.5 gray level
a) definition
Screen at the same level of brightness in gray-scale from zero to the highest level between the gray-G.
b) request
Demarcation of the gray-level G general-free into gray-scale (1-bit grayscale technology), 4 (2-bit grayscale technology), 8 (3-bit grayscale technology),
SJ / T 11281 2003
16 (4-bit grayscale technology), 32 (5-bit gray-scale technology), 64 (6-bit gray-scale technology), 128 (7-bit grayscale technology), 256 (8-bit Gray technology) level, and so on. In any level, with light gray-level rise in the number should be increased was monotonous.
c) Measurement
1) Measurement conditions:
━ ━ environmental changes in the illumination rate of less than ± 10%.
━ ━ throughout the testing process color analyzer of the same scope of the collection.
2) Test:
━ ━ start testing the software gray, gray-scale levels increase, with the screen brightness to the gray level rise, on a monotonous
Up.
━ ━ real gray level in the following states:
If: 1 <G ≤ 2, with a screen that is 1-bit grayscale technology.
If: 2 <G ≤ 4, with a screen that is 2-bit grayscale technology.
If: 4 <G ≤ 8, which is defined as the screen with 3-bit gray-scale technology.
If: 8 <G ≤ 16, has a screen that is, 4-bit grayscale technology.
If: 16 <G ≤ 32, with a display that is 5-bit gray-scale technology.
If: 32 <G ≤ 64, has a screen that is 6-bit gray-scale technology.
If: 64 <G ≤ 128, with a screen that is 7-bit gray-scale technology.
If: 128 <G ≤ 256, with a screen that is 8-bit grayscale technology.
And so on
5.3.6 SNR
a) definition
In the video signal, the signal RMS RMS S and N noise ratio (S / N).
b) request
Table 15: SNR
A Class B Class C Class
43dB> S / N ≥ 35dB 47dB> S / N ≥ 43dB S / N ≥ 47dB

c) The signal to noise ratio measurement
━ ━ used strong-ray instrument probe of a hooded pixels (to prevent outside interference of light), and thereafter to test the process of light into instrument lighting
Head of the situation remain unchanged.
━ ━ display will be placed in the highest brightness, the largest gray, measured under the light of this situation of the IEM.
━ ━ display will be placed in the highest brightness level, 50% gray, gray-scale to measure the intensity of the IEH.
━ ━ color television signal instrument (signal to noise ratio greater than 52dB), to the control system into the white signal (PAL system), color adjustment
TV signal output of the instrument range, so that the pixel light intensity equivalent to IEH, and then in the state to allow display and a half hours of continuous work.
━ ━ video screen for a freeze at this time, and then measured the frozen screen pixel light IDi, a total of 20 times to repeat the steps to detect ID1,
ID2 ... ... ID20.
━ ━ to find out which of the three largest IDi for the arithmetic average IDmax, and then find out which of the three smallest IDi arithmetic average for a
To IDmin.
━ ━ press-to-noise ratio calculated.

S / N = 20lg [2 √ 2 IEM / (IDmax-IDmin)] ... ... ... ... ... ... ... ... ... ... ... ... (6)
━ ━ according to table 15, under the appropriate level.
5.3.7 pixel rate of loss of control
a) definition
Pixel rate of loss of control of the main screen pixel out of control refers to the entire region and the rate of pixels out of control.
Pixel out of control points and blind spots often divided into two types of bright spots.
Full-screen pixel out of control PZ rate equal to the entire screen with a few blind spots Always point of the whole screen and full-screen pixels in the previous year.
PQ-pixel region out of control rate equal to a few blind spots and the region's Always points and the number of pixels than the region (refer to the region 100X100 pixel matrix).
b) request
Table 16: pixel rate of loss of control
A B C

Indoor full-screen pixel out of control rate of 3 / 104 ≥ PZ> 2 / 104 2 / 104 ≥ PZ> 1 / 104 PZ ≤ 1 / 104
Pixel region out of control the rate of 9 / 104 ≥ PQ> 6 / 104 6 / 104 ≥ PQ> 3 / 104 PQ ≤ 3 / 104
Outdoor full-screen pixel out of control rate of 2 / 103 ≥ PZ> 4 / 104 4 / 104 ≥ PZ> 1 / 104 PZ ≤ 1 / 104
Pixel region out of control the rate of 6 / 103 ≥ PQ> 12/104 12/104 ≥ PQ> 3 / 104 PQ ≤ 3 / 104


c) Measurement
1) the entire screen pixel measurement of the rate of loss of control:
━ ━ entire screen showing the gray-scale red, with a number of non-visual light of the number of pixels PF.
━ ━ Qing Ping, with a few visual method of red pixels Always PL.
━ ━ with under-calculated the rate of red pixels out of control.
PZR = (PF + PL) / P
P for the total number of full-screen pixel (P if less than 10,000, according to calculations 10,000)
━ ━ the same way out of the blue pixels can be measured rate of loss of control of the PZB and green pixel rate of loss of control PZG.
━ ━ take PZR, PZB, PZG the highest value as the whole screen pixel rate of loss of control PZ, in accordance with the requirements of Table 16, into the corresponding level.
2) the rate of loss of control of the region pixel measurement
━ ━ software used to be a 100 * 100 pixels of the movable red box (top-level grayscale).
━ ━ to move the red box to find the blind spot of the most densely populated region of the AP.
━ ━ with visual method box with a few blind spots in a number of red M.
━ ━ Qing Ping, a number of regional visual method AP Always with red points N.
━ ━ regional red pixels out of control equal to the rate of M, N divided by region and the number of pixels (PQ R = M + N/10000).
━ ━ use the same method to measure the rate of loss of control of regional green pixels and PQG regional blue pixels out of control rate PQB.
━ ━ take PQR, PQB, PQG highest in the region as out of control pixel rate of PQ, and Table 16's request, included in the corresponding level.