Editing RGB color model (section)

===Television===
Before the development of practical electronic TV, there were patents on mechanically scanned color systems as early as 1889 in [[Russian Empire|Russia]]. The [[color television|color TV]] pioneer [[John Logie Baird]] demonstrated the world's first RGB color transmission in 1928, and also the world's first color broadcast in 1938, in [[London]]. In his experiments, scanning and display were done mechanically by spinning colorized wheels.<ref>John Logie Baird, [https://patents.google.com/patent/US1925554 Television Apparatus and the Like], U.S. patent, filed in U.K. in 1928.</ref><ref>Baird Television: [http://www.bairdtelevision.com/crystalpalace.html Crystal Palace Television Studios]. Previous color television demonstrations in the U.K. and U.S. had been via closed circuit.</ref>

The [[CBS|Columbia Broadcasting System (CBS)]] began an experimental RGB [[field-sequential color system]] in 1940. Images were scanned electrically, but the system still used a moving part: the transparent RGB color wheel rotating at above 1,200&nbsp;rpm in synchronism with the vertical scan. The camera and the [[cathode-ray tube]] (CRT) were both [[monochromatic]]. Color was provided by color wheels in the camera and the receiver.<ref>{{cite news|url=https://select.nytimes.com/gst/abstract.html?res=FA0C15F6385A11728DDDA90B94D0405B8088F1D3
|title=Color Television Success in Test
|access-date=2008-05-12
|page=21
|work=NY Times
|date=1940-08-30}}</ref><ref>"[https://web.archive.org/web/20080611114246/http://pqasb.pqarchiver.com/wsj/access/107348215.html?dids=107348215:107348215&FMT=ABS&FMTS=ABS:AI&date=Sep+5%2C+1940 CBS Demonstrates Full Color Television]," ''Wall Street Journal'', Sept. 5, 1940, p. 1.</ref><ref>{{cite news
|url=https://www.nytimes.com/1940/11/13/archives/television-hearing-set-commercial-sale-waits-on-fcc-engineers-are.html
|access-date=2008-05-12
|date=1940-11-13
|title=Television Hearing Set
|work=NY Times
|page=26}}</ref> More recently, color wheels have been used in field-sequential projection TV receivers based on the Texas Instruments monochrome DLP imager.

The modern RGB [[shadow mask]] technology for color CRT displays was patented by Werner Flechsig in Germany in 1938.<ref>{{cite book|title=A History of Electronic Entertainment Since 1945 |first=David L. |last=Morton |url=http://www.ieee.org/portal/cms_docs_iportals/iportals/aboutus/history_center/publications/entertainment/Chapter2.pdf |chapter=Television Broadcasting |publisher=IEEE |year=1999 |isbn=0-7803-9936-6 |url-status=dead |archive-url=https://web.archive.org/web/20090306171954/http://www.ieee.org/portal/cms_docs_iportals/iportals/aboutus/history_center/publications/entertainment/Chapter2.pdf |archive-date=March 6, 2009 }}</ref>