SJ/T 11346-2015 PDF English
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Methods of measurement for electronic projectors
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SJ/T 11346-2015: Methods of measurement for electronic projectors---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/SJT11346-2015
ELECTRONICS INDUSTRY STANDARD
ICS 33.160.25
M 74
Filing No.. 52000-2015
Replacing SJ/T 11346-2006
Methods of measurement for electronic projectors
Issued on. OCTOBER 10, 2015
Implemented on. APRIL 01, 2016
Issued by. Industry and Information Technology of PRC
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 Terms, definitions, abbreviations... 7
4 General requirements for measurement... 8
5 Measurement method of normal temperature performance... 14
Appendix A (Informative) Conversion method between CIE1976 uniform color space
and CIE1931 color space... 29
Methods of measurement for electronic projectors
1 Scope
This standard specifies the terms and definitions, measurement conditions,
measurement items, measurement methods, measurement results expression, etc., of
electronic projectors.
This standard applies to electronic projection type fixed resolution projectors
(hereinafter referred to as projectors), including liquid crystal display (LCD) projectors,
liquid crystal on silicon (LCoS) projectors, digital light processing (DLP) projectors,
etc. Other projection methods and electronic projectors, which are used in different
occasions, can be implemented with reference to it.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB 3174 PAL-D system TV broadcasting technical specification
GB/T 6882 Acoustics - Determination of sound power levels of noise sources using
pressure - Precision methods for anechoic and hemi-anechoic rooms
GB/T 7921 Uniform color space and color difference formula
GB/T 14857 The specifications of encoding parameters of digital television for
studio
GB/T 15644 Application of connectors for the interconnection of equipment in
audio-visual systems
GB/T 17953 Interfaces for 4.2.2 digital component video signals
3 Terms, definitions, abbreviations
3.1 Terms and definitions
The terms and definitions, which are defined in SJ/T 11324, as well as the following
terms and definitions, apply to this document.
3.2 Abbreviations
The following abbreviations apply to this document.
CCT. Correlated colour temperature
CIE. Commission internationale de L' Eclairage (fr)
DLP. Digital light process
LCD. Liquid crystal display
LCoS. Liquid crystal on silicon
4 General requirements for measurement
4.1 General description
Unless otherwise specified, the voltage values, which are given in this standard, are
valid values.
4.2 Performance measurement conditions
4.3 Measuring instruments
4.3.1 Illuminometer
The illuminometer requirements are as follows.
4.3.2 Video signal generator
The requirements for video signal generator are as follows.
4.3.3 Anechoic chamber
The anechoic chamber and related equipment shall comply with the provisions of GB/T
6882.
4.3.4 Power supply
The power supply requirements are as follows.
4.3.5 Power meter
The power meter is an active power meter. The minimum current range is less than or
equal to 10 mA. The reading is accurate to at least 0.01 W, when measuring power less
than or equal to 10 W.
4.3.6 Weighing device
The measurement results of the weighing device shall be accurate to at least 0.1 kg.
4.4 Video test signal
4.4.1 Overview
The test signal shall have a signal format, which is consistent with the inherent
resolution of the projector. The standard definition signal conforms to the provisions of
GB/T 14857.The high-definition test signal conforms to the provisions of GY/T 155.
The input interface, aspect ratio, input format of the test signal shall be indicated, in the
measurement results.
4.4.3 Color bar signal
See 5.3 in GB/T 26270-2010, for the description and examples of test diagram.
4.4.4 All-white field signal and all-black field signal
See 5.4 in GB/T 26270-2010, for the description and examples of test diagram.
4.4.5 Location map of uniformity test points
See Figure D.2 in GB/T 26270-2010, for the description and examples of test diagram.
4.4.6 Black and white window signal
See 5.8 in GB/T 26270-2010, for the description and examples of test diagram.
4.4.7 Single pixel signal
See 5.20 in GB/T 26270-2010, for the description and examples of test diagram.
5 Measurement method of normal temperature performance
5.1 Correlated color temperature
5.1.1 Overview
This clause is to measure the correlated color temperature (CCT) of the projector, under
standard operating state.
5.1.2 Measurement steps
5.1.3 Presentation of measurement results
Measurement results are expressed in Kelvin (K).
5.2 Luminance output
5.2.1 Overview
This clause specifies the measurement of the luminance output of the projector, under
standard operating state.
5.3 Illuminance uniformity
5.3.1 Overview
This clause specifies the measurement of the consistency of the projector's output on
the entire screen on the projection surface, under standard operating states.
5.3.2 Measurement steps
5.3.3 Presentation of measurement results
Illuminance uniformity is expressed as a percentage (%).
5.4 Contrast
5.4.1 Overview
This clause specifies the measurement of the ratio of the average illuminance of the
brightest area to the darkest area, on the same screen, under normal operating states of
the projector.
5.4.2 Measurement steps
5.7 Definition
5.7.1 Overview
The vertical and horizontal definition of the image is observed subjectively.
5.7.2 Measurement steps
5.8 Input format compatibility
5.8.1 Overview
This clause specifies the measurement of the playback capability of the projector, to
different input signal formats, under standard operating states.
5.22 Grid power adaptability
5.22.1 Overview
This clause specifies the measurement of the ability of the projector to keep working
normally, when the mains power supply changes.
5.22.2 Measurement steps
5.22.3 Presentation of measurement results
The measurement result is expressed as the variation range of the grid power supply,
when the projector can work normally.
5.23 Remote control distance
5.23.1 Overview
This clause specifies the measurement of the farthest distance, that the remote control
can make the projector work normally, when the projector is remote controlled.
5.23.2 Measurement steps
The working voltage of the remote control transmitter shall be the rated value. The
remote control infrared light's receiving window surface is in the environment of natural
light or fluorescent lamp illumination of (200 ± 50) lx; the projector inputs composite
test diagram;
5.23.3 Presentation of measurement results
Measurement results are expressed in meters (m).
5.24 Controlled angle
5.24.1 Overview
This clause specifies the measurement of the maximum horizontal and vertical angles,
at which the remote control can make the projector work normally, when the projector
is remotely controlled.
5.25 Mass of whole machine
5.25.1 Overview
This clause specifies the measurement of the overall mass of the projector.
5.25.2 Measurement steps
Place the unpackaged projector into the weighing device, to measure the overall mass,
including the working lens.
5.25.3 Presentation of measurement results
Measurements are expressed in kilograms (kg).
5.26 Color light output
5.26.1 Overview
This clause specifies the measurement of the color light output of the projector, under
standard operating states.
5.26.2 Measurement steps
SJ/T 11346-2015
ELECTRONICS INDUSTRY STANDARD
ICS 33.160.25
M 74
Filing No.. 52000-2015
Replacing SJ/T 11346-2006
Methods of measurement for electronic projectors
Issued on. OCTOBER 10, 2015
Implemented on. APRIL 01, 2016
Issued by. Industry and Information Technology of PRC
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 Terms, definitions, abbreviations... 7
4 General requirements for measurement... 8
5 Measurement method of normal temperature performance... 14
Appendix A (Informative) Conversion method between CIE1976 uniform color space
and CIE1931 color space... 29
Methods of measurement for electronic projectors
1 Scope
This standard specifies the terms and definitions, measurement conditions,
measurement items, measurement methods, measurement results expression, etc., of
electronic projectors.
This standard applies to electronic projection type fixed resolution projectors
(hereinafter referred to as projectors), including liquid crystal display (LCD) projectors,
liquid crystal on silicon (LCoS) projectors, digital light processing (DLP) projectors,
etc. Other projection methods and electronic projectors, which are used in different
occasions, can be implemented with reference to it.
2 Normative references
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document;
for the undated documents, only the latest version (including all the amendments) is
applicable to this standard.
GB 3174 PAL-D system TV broadcasting technical specification
GB/T 6882 Acoustics - Determination of sound power levels of noise sources using
pressure - Precision methods for anechoic and hemi-anechoic rooms
GB/T 7921 Uniform color space and color difference formula
GB/T 14857 The specifications of encoding parameters of digital television for
studio
GB/T 15644 Application of connectors for the interconnection of equipment in
audio-visual systems
GB/T 17953 Interfaces for 4.2.2 digital component video signals
3 Terms, definitions, abbreviations
3.1 Terms and definitions
The terms and definitions, which are defined in SJ/T 11324, as well as the following
terms and definitions, apply to this document.
3.2 Abbreviations
The following abbreviations apply to this document.
CCT. Correlated colour temperature
CIE. Commission internationale de L' Eclairage (fr)
DLP. Digital light process
LCD. Liquid crystal display
LCoS. Liquid crystal on silicon
4 General requirements for measurement
4.1 General description
Unless otherwise specified, the voltage values, which are given in this standard, are
valid values.
4.2 Performance measurement conditions
4.3 Measuring instruments
4.3.1 Illuminometer
The illuminometer requirements are as follows.
4.3.2 Video signal generator
The requirements for video signal generator are as follows.
4.3.3 Anechoic chamber
The anechoic chamber and related equipment shall comply with the provisions of GB/T
6882.
4.3.4 Power supply
The power supply requirements are as follows.
4.3.5 Power meter
The power meter is an active power meter. The minimum current range is less than or
equal to 10 mA. The reading is accurate to at least 0.01 W, when measuring power less
than or equal to 10 W.
4.3.6 Weighing device
The measurement results of the weighing device shall be accurate to at least 0.1 kg.
4.4 Video test signal
4.4.1 Overview
The test signal shall have a signal format, which is consistent with the inherent
resolution of the projector. The standard definition signal conforms to the provisions of
GB/T 14857.The high-definition test signal conforms to the provisions of GY/T 155.
The input interface, aspect ratio, input format of the test signal shall be indicated, in the
measurement results.
4.4.3 Color bar signal
See 5.3 in GB/T 26270-2010, for the description and examples of test diagram.
4.4.4 All-white field signal and all-black field signal
See 5.4 in GB/T 26270-2010, for the description and examples of test diagram.
4.4.5 Location map of uniformity test points
See Figure D.2 in GB/T 26270-2010, for the description and examples of test diagram.
4.4.6 Black and white window signal
See 5.8 in GB/T 26270-2010, for the description and examples of test diagram.
4.4.7 Single pixel signal
See 5.20 in GB/T 26270-2010, for the description and examples of test diagram.
5 Measurement method of normal temperature performance
5.1 Correlated color temperature
5.1.1 Overview
This clause is to measure the correlated color temperature (CCT) of the projector, under
standard operating state.
5.1.2 Measurement steps
5.1.3 Presentation of measurement results
Measurement results are expressed in Kelvin (K).
5.2 Luminance output
5.2.1 Overview
This clause specifies the measurement of the luminance output of the projector, under
standard operating state.
5.3 Illuminance uniformity
5.3.1 Overview
This clause specifies the measurement of the consistency of the projector's output on
the entire screen on the projection surface, under standard operating states.
5.3.2 Measurement steps
5.3.3 Presentation of measurement results
Illuminance uniformity is expressed as a percentage (%).
5.4 Contrast
5.4.1 Overview
This clause specifies the measurement of the ratio of the average illuminance of the
brightest area to the darkest area, on the same screen, under normal operating states of
the projector.
5.4.2 Measurement steps
5.7 Definition
5.7.1 Overview
The vertical and horizontal definition of the image is observed subjectively.
5.7.2 Measurement steps
5.8 Input format compatibility
5.8.1 Overview
This clause specifies the measurement of the playback capability of the projector, to
different input signal formats, under standard operating states.
5.22 Grid power adaptability
5.22.1 Overview
This clause specifies the measurement of the ability of the projector to keep working
normally, when the mains power supply changes.
5.22.2 Measurement steps
5.22.3 Presentation of measurement results
The measurement result is expressed as the variation range of the grid power supply,
when the projector can work normally.
5.23 Remote control distance
5.23.1 Overview
This clause specifies the measurement of the farthest distance, that the remote control
can make the projector work normally, when the projector is remote controlled.
5.23.2 Measurement steps
The working voltage of the remote control transmitter shall be the rated value. The
remote control infrared light's receiving window surface is in the environment of natural
light or fluorescent lamp illumination of (200 ± 50) lx; the projector inputs composite
test diagram;
5.23.3 Presentation of measurement results
Measurement results are expressed in meters (m).
5.24 Controlled angle
5.24.1 Overview
This clause specifies the measurement of the maximum horizontal and vertical angles,
at which the remote control can make the projector work normally, when the projector
is remotely controlled.
5.25 Mass of whole machine
5.25.1 Overview
This clause specifies the measurement of the overall mass of the projector.
5.25.2 Measurement steps
Place the unpackaged projector into the weighing device, to measure the overall mass,
including the working lens.
5.25.3 Presentation of measurement results
Measurements are expressed in kilograms (kg).
5.26 Color light output
5.26.1 Overview
This clause specifies the measurement of the color light output of the projector, under
standard operating states.
5.26.2 Measurement steps
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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