SEMI International Standards
Standards New Activity Report Form (SNARF)
Revised (if Applicable):
New Standard, Test Method for Clarity Characteristic of Transparent Display
Originating Global Technical Committee:
Flat Panel Display (FPD) - Metrology
Originating TC Chapter:
Task Force (TF) in which work is to be carried out:
Note: If a new task force is needed, also submit a task force organization form (TFOF)
a. Describe the need or problem addressed by this activity.
(Indicate the customer, what benefits they will receive, and if possible, quantify the impact on the return on investment [ROI] if the Document is implemented.)
Transparent displays have transmitted see-through function over conventional displays. Evaluation of the transmission performance in transparent displays would be important. The transmitted image through a transparent display can be less bright and more blurry than an original background object. Those of brightness reduction and blurriness are related to the path of the light while passing through a transparent display. The light from the background is absorbed, reflected, scattered, refracted, and diffracted when meets a transparent display. Dimmer images are mainly due to absorption and reflection. Blurry images are caused principally by diffraction and scattering. Diffracted light would make additional images by the constructive interference, and eliminate images by the destructive interference. For several decades, Transmittance and haze have been widely used to quantify the transmission performance of transparent display devices. International standards (ASTM and ISO) define transmittance has been measured as the ratio of the transmitted luminous flux to the incident luminous flux and haze has been measured a percentage of transmitted light which deviates from the incident light by no more than 2.5° by forward scattering.
Unfortunately, these measuring methods disagree with perceived additional images through a transparent display. Because, the reduction of brightness through a transparent display can be measured using transmittance and haze is measured by the total amount of the scattered light. Furthermore, perceived additional images through a transparent display have different display characteristics and image quality as viewing angle. Therefore, a new metrology is required to evaluate the transmission performance of transparent displays in consistence with human visual perception
b. Estimate effect on industry.
2: Major effect on an industry sector - identify the relevant sector
Sector or Company Information:
c. Estimate technical difficulty of the activity.
II: Some Difficulty - Disagreements on known requirements exist but developing consensus is possible
Describe the technical areas to be covered or addressed by this Document development activity. For Subordinate Standards, list common concepts or criteria that the Subordinate Standard inherits from the Primary Standard, as well as differences from the Primary Standard:
2.1 The electro optical measurement method (transmission performance) of the transparent display.
2.2 This Standard defines horizontal and vertical viewing angles for measurement.
2.3 The scope of the term “viewing angle characteristic” is related to luminance variation through a transparent display in this Standard.
b: Expected result of activity
New Standard or Safety Guideline (including replacement of an existing Standard or Safety Guideline)
For a new Subordinate Standard, identify the Primary Standard here:
For Standards, identify the Standard Subtype below:
3. Projected Timetable for Completion:
a: General Milestones
a. Activity Start:
b. 1st Draft by:
c. (Optional) Informational Ballot by:
d. Letter Ballot by:
e. TC Chapter Approval By:
4. Liaisons with other Global Technical Committees/TC Chapters/Subcommittees/TFs:
List global technical committees, TC Chapters, subcommittees, or task forces in your or other Regions/Locales that should be kept informed regarding the progress of this activity. (Refer to SEMI Standards organization charts and global technical committee charters as needed.)
Japan FPD Metrology TC Chapter, Taiwan FPD Metrology TC Chapter, NA FPD Metrology TC Chapter
will not be issued
Identify the recipient global technical committee(s):
5. Safety Considerations:
The resulting document is expected:
NOT to be a Safety Guideline
to be a Safety Guideline
": When all safety-related information is removed from the Document, the Document is NOT technically sound and complete - Refer to Section 15.1 of the
for special procedures to be followed.
NOT to be a Safety Guideline
": When all safety-related information is removed from the Document, the Document is still technically sound and complete.
6. Intellectual Property Considerations:
For a new Standard or Safety Guideline and for any part to be modified or added in a Revision of published Standards and Safety Guidelines
the use of patented technology is NOT required.
If "patented technology is intended to be included in the proposed Standard(s) or Safety Guideline(s) " is selected above, then also check one:
For Revision, Reapproval, Reinstatement, or Withdrawal of existing Standard(s) and Safety Guideline(s):
The body of the Document and any Appendices, Complementary Files, Related Information sections, or Various Materials that may or may not be a part of the Document by reference:
will NOT include reproduced copyrighted material
the use of patented technology or the incorporation of Copyrighted Item(s) is NOT required’
: If in the course of developing the Document, it is determined that the use of patented technology or Copyrighted Item(s) is necessary for the Document, the provisions of
§ 16 must be followed.
will incorporate Copyrighted Item’
: A copyright release letter must be obtained from the copyright owner prior to publication.
7. Comments, Special Circumstances:
TC Member Review:
took place between (put dates below) before approval by the GCS, or
Member Review Start Date;
Member Review End Date:
‘TC Member Review’ is required by the
for a period of at least two weeks
before approval of a new, or a major revision of an existing, Standard or Safety Guideline. (See
9. SNARF Approval Dates:
TC Chapter or GCS
Recorded in TC Minutes
10. SNARF Extension Dates:
TC Chapter Extension Granted on
Extension Expires on
Attach Pictures and Files here: