Display: Revision history

28 March 2020

• curprev 18:5618:56, 28 March 2020‎ Aperezbios talk contribs‎ 16,832 bytes −16‎ →‎The theory: fix dead link to archive.org replacement

7 June 2012

• curprev 23:1923:19, 7 June 2012‎ Sridhar talk contribs‎ 16,848 bytes −1‎ →‎Quick Summary: updated screen dimensions

9 September 2011

• curprev 00:3400:34, 9 September 2011‎ Mwarren talk contribs‎ 16,849 bytes +410‎ →‎Screen: Add color and monochrome terms to help clarify description. Add requested brightness button image.

27 September 2010

• curprev 03:1903:19, 27 September 2010‎ Wad talk contribs‎ 16,439 bytes −290‎ →‎Understanding the display system

24 September 2010

• curprev 16:1016:10, 24 September 2010‎ Wad talk contribs‎ 16,729 bytes −603‎ Still correcting misconcetions
• curprev 06:1806:18, 24 September 2010‎ Wad talk contribs‎ 17,332 bytes −104‎ Trying to correct some misconceptions about the display
• curprev 06:0206:02, 24 September 2010‎ Wad talk contribs‎ 17,436 bytes +134‎ →‎Our screen, described as two screens sharing an LCD

16 September 2010

• curprev 18:1718:17, 16 September 2010‎ Wad talk contribs‎ 17,302 bytes +33‎ →‎Our screen, described as two screens sharing an LCD

6 July 2010

• curprev 17:2917:29, 6 July 2010‎ FGrose talk contribs‎ 17,269 bytes +7‎ typos

27 May 2010

• curprev 05:0405:04, 27 May 2010‎ Wad talk contribs‎ 17,262 bytes +55‎ →‎DCON screen driver chip
• curprev 04:5904:59, 27 May 2010‎ Wad talk contribs‎ 17,207 bytes +4‎ →‎Control from Linux
• curprev 04:5604:56, 27 May 2010‎ Wad talk contribs‎ 17,203 bytes −13‎ No edit summary
• curprev 04:2904:29, 27 May 2010‎ Wad talk contribs‎ 17,216 bytes −899‎ No edit summary

25 May 2010

• curprev 16:5516:55, 25 May 2010‎ Wad talk contribs‎ 18,115 bytes +637‎ No edit summary

28 October 2009

• curprev 20:1420:14, 28 October 2009‎ Mwarren talk contribs‎ 17,478 bytes +778‎ →‎Other notes: Add colored grid to illustrate pixel layout.
• curprev 19:3419:34, 28 October 2009‎ Mwarren talk contribs‎ 16,700 bytes −7‎ Change citation to book to avoid need for another Template.
• curprev 19:2719:27, 28 October 2009‎ Mwarren talk contribs‎ 16,707 bytes +734‎ →‎The theory: Update w/ measured dpi (which nearly doubles visually resolvable pixels). Add citations for resolution writeups.
• curprev 19:1419:14, 28 October 2009‎ Mwarren talk contribs‎ 15,973 bytes +9,812‎ Undo revision 222019 by 150.176.45.172 (Talk) Vandalism

27 October 2009

• curprev 14:3114:31, 27 October 2009‎ 150.176.45.172 talk‎ 6,161 bytes −9,812‎ →‎Understanding the hardware

21 June 2009

• curprev 04:4004:40, 21 June 2009‎ Wad talk contribs‎ 15,973 bytes +36‎ No edit summary

11 June 2009

• curprev 21:1621:16, 11 June 2009‎ Mwarren talk contribs‎ 15,937 bytes +28‎ Add References section with reflist.

1 June 2009

• curprev 04:5104:51, 1 June 2009‎ Straz talk contribs‎ 15,909 bytes +53‎ →‎Summary
• curprev 04:3604:36, 1 June 2009‎ 207.180.176.25 talk‎ 15,856 bytes +224‎ →‎Summary

12 February 2009

• curprev 07:1607:16, 12 February 2009‎ Wad talk contribs‎ 15,632 bytes −44‎ No edit summary

30 December 2008

• curprev 05:1005:10, 30 December 2008‎ Wad talk contribs‎ m 15,676 bytes +10‎ Added OLPC banner

26 November 2008

• curprev 04:2804:28, 26 November 2008‎ Skierpage talk contribs‎ 15,666 bytes +131‎ →‎See also: add link to Geode X display driver at http://cgit.freedesktop.org/xorg/driver/xf86-video-geode/
• curprev 04:0104:01, 26 November 2008‎ Skierpage talk contribs‎ m 15,535 bytes −20‎ Category:Display, remove inappropriate Category:Video

19 November 2008

• curprev 21:0521:05, 19 November 2008‎ Mwarren talk contribs‎ 15,555 bytes +203‎ →‎Screen: Add XO-1 pixel image from patent application.
• curprev 20:3020:30, 19 November 2008‎ Mwarren talk contribs‎ 15,352 bytes +371‎ →‎The theory: Add reference to Livingstone's "Vision and Art" - chapters 1 and 2 provide a nice layman's description of the human visual system. Reorder sentence as info blend, perception, lighting

17 November 2008

• curprev 03:4903:49, 17 November 2008‎ 206.222.212.218 talk‎ 14,981 bytes −226‎ →‎The theory: discussion to discussion page please

6 October 2008

• curprev 03:5503:55, 6 October 2008‎ Cjl talk contribs‎ m 15,207 bytes −13‎ Reverted edits by 125.93.0.14 (Talk); changed back to last version by 148.87.1.171

5 October 2008

• curprev 16:1916:19, 5 October 2008‎ 125.93.0.14 talk‎ 15,220 bytes +13‎ eltlit

17 June 2008

• curprev 22:0822:08, 17 June 2008‎ 148.87.1.171 talk‎ 15,207 bytes +290‎ →‎The theory: Separate dark, dim and bright viewing numbers. Clarify that ''perceived'' resolution is changing; the OLPC electronics and software remain exactly the same thing in all three cases.

23 January 2008

• curprev 11:4411:44, 23 January 2008‎ 82.46.19.160 talk‎ 14,917 bytes +168‎ →‎The theory

27 December 2007

• curprev 08:3708:37, 27 December 2007‎ Stimuli talk contribs‎ m 14,749 bytes −13‎ →‎Number of backlight levels

15 November 2007

• curprev 17:3317:33, 15 November 2007‎ 128.237.242.174 talk‎ 14,762 bytes +4‎ →‎Elaboration: proper emphasis

9 November 2007

• curprev 18:5418:54, 9 November 2007‎ 130.76.96.15 talk‎ 14,758 bytes 0‎ type, replace It with In

7 November 2007

• curprev 16:4316:43, 7 November 2007‎ Bemasc talk contribs‎ 14,758 bytes +95‎ →‎Tools

18 October 2007

• curprev 15:3415:34, 18 October 2007‎ MitchellNCharity talk contribs‎ 14,663 bytes +19‎ +Category:Video

17 October 2007

• curprev 18:5218:52, 17 October 2007‎ AndreasT talk contribs‎ 14,644 bytes +89‎ No edit summary

12 October 2007

• curprev 04:4204:42, 12 October 2007‎ MitchellNCharity talk contribs‎ 14,555 bytes +85‎ →‎Other notes: +'1 cd; ~1 lm'. Corrected nomenclature: cd/m^2 is luminance, not luminous intensity - source article has it wrong.

18 August 2007

• curprev 18:1918:19, 18 August 2007‎ MitchellNCharity talk contribs‎ m 14,470 bytes +9‎ →‎Use: tweak
• curprev 17:4217:42, 18 August 2007‎ MitchellNCharity talk contribs‎ 14,461 bytes +24‎ →‎Use: Change to a simpler story.
• curprev 17:2817:28, 18 August 2007‎ MitchellNCharity talk contribs‎ 14,437 bytes +440‎ →‎Designing for the display: Added description of typical use. I have reservations about the quote's emphasis on modes.
• curprev 16:2616:26, 18 August 2007‎ MitchellNCharity talk contribs‎ 13,997 bytes +183‎ →‎DCON screen driver chip: Turning the backlight off gives DCON monochrome mode. Wordsmith previous commit.
• curprev 16:2116:21, 18 August 2007‎ MitchellNCharity talk contribs‎ 13,814 bytes +160‎ →‎DCON screen driver chip: Resolved current (non)availability of color non-antialiased mode.

6 August 2007

• curprev 18:5018:50, 6 August 2007‎ MitchellNCharity talk contribs‎ 13,654 bytes +172‎ →‎DCON screen driver chip: Update with jg's devel list statement that you _can_ get "DCON color swizzled not antialised".

5 August 2007

• curprev 21:2121:21, 5 August 2007‎ MitchellNCharity talk contribs‎ 13,482 bytes +187‎ →‎Our screen, described by its parts: Added xo and thinkpad screen images taken with the xo microscope.
• curprev 19:3919:39, 5 August 2007‎ MitchellNCharity talk contribs‎ 13,295 bytes +142‎ →‎See also: Added link to 'A video with closeups of an XO and ThinkPad screen, made using an XO microscope'.

14 July 2007

• curprev 02:2502:25, 14 July 2007‎ 71.106.148.183 talk‎ 13,153 bytes 0‎ →‎Elaboration: corrected "then" to "than"

2 July 2007

• curprev 20:2220:22, 2 July 2007‎ MitchellNCharity talk contribs‎ 13,153 bytes −301‎ →‎Tools: gray_rgb() implementation added. 2-line version is no worse than the 2-day 200-line version. Sigh.

1 July 2007

• curprev 19:5619:56, 1 July 2007‎ MitchellNCharity talk contribs‎ 13,454 bytes −107‎ →‎Mockups for UI design: Section replaced by link to Life-size_laptop_pictures.
• curprev 16:3816:38, 1 July 2007‎ MitchellNCharity talk contribs‎ 13,561 bytes +172‎ →‎Tools: Added live-size screen grids.

30 June 2007

• curprev 15:2615:26, 30 June 2007‎ MitchellNCharity talk contribs‎ 13,389 bytes +309‎ Added Todo 'Give more detail about the DCON modes, and how to use them.'. Added link to Getting_started_programming#Mode-switching_code_for_the_screen.
• curprev 15:1815:18, 30 June 2007‎ MitchellNCharity talk contribs‎ 13,080 bytes +78‎ →‎See also: Added link to olpc_dcon.h

29 June 2007

• curprev 04:5104:51, 29 June 2007‎ MitchellNCharity talk contribs‎ 13,002 bytes +184‎ →‎Other notes: Note posibility of an 693x520 (color) official story.
• curprev 04:2004:20, 29 June 2007‎ MitchellNCharity talk contribs‎ 12,818 bytes +41‎ →‎Elaboration: tweak
• curprev 03:5803:58, 29 June 2007‎ MitchellNCharity talk contribs‎ 12,777 bytes +35‎ Make Hardware_specification#Display into an introductory link again.
• curprev 03:5703:57, 29 June 2007‎ MitchellNCharity talk contribs‎ 12,742 bytes +139‎ →‎screen simulation: tweak. Mention explicityly that rgb->Luv,change L,->rgb is simple if you restrict rgb to stay in gamut with the new L.
• curprev 03:5303:53, 29 June 2007‎ MitchellNCharity talk contribs‎ m 12,603 bytes +3‎ →‎screen simulation: tweak layout
• curprev 03:5203:52, 29 June 2007‎ MitchellNCharity talk contribs‎ m 12,600 bytes +7‎ →‎DCON screen driver chip: tweak
• curprev 03:4803:48, 29 June 2007‎ MitchellNCharity talk contribs‎ 12,593 bytes −7‎ →‎Tools: tweak layout
• curprev 03:4803:48, 29 June 2007‎ MitchellNCharity talk contribs‎ 12,600 bytes −2,708‎ Overhaul draws to a close.
• curprev 02:3302:33, 29 June 2007‎ MitchellNCharity talk contribs‎ 15,308 bytes +3,445‎ A check point in the ongoing overhaul.

28 June 2007

• curprev 20:5620:56, 28 June 2007‎ MitchellNCharity talk contribs‎ 11,863 bytes +519‎ Added link to interactive-olpc-xo-display-simulation. Added summary of ajax's argument.
• curprev 20:1220:12, 28 June 2007‎ MitchellNCharity talk contribs‎ 11,344 bytes +106‎ →‎ajax post: added "design for bigger UI elements and high contrast. 33% is a reasonable scale factor.".
• curprev 20:0720:07, 28 June 2007‎ MitchellNCharity talk contribs‎ 11,238 bytes +2,058‎ Added extended quote from ajax post.
• curprev 19:4119:41, 28 June 2007‎ MitchellNCharity talk contribs‎ 9,180 bytes +86‎ Noted source of "rule of thumb" numbers.
• curprev 19:1419:14, 28 June 2007‎ MitchellNCharity talk contribs‎ 9,094 bytes +152‎ Added luminous intensity (cd/m^2) and contrast ratio from www.heise.de/mobil/artikel/88916/3.
• curprev 19:0419:04, 28 June 2007‎ MitchellNCharity talk contribs‎ 8,942 bytes +1,383‎ Some additional text, mostly dcon related.
• curprev 17:2917:29, 28 June 2007‎ MitchellNCharity talk contribs‎ 7,559 bytes +133‎ Fix: pixel L always 6 bit. Added links to DCON spec, and to ticket 1017 (discussion of color pipeline).
• curprev 16:3816:38, 28 June 2007‎ MitchellNCharity talk contribs‎ 7,426 bytes +1,919‎ Various tweaks. Added paragraphs derived from Mary Lou Jepsen comments on wikipedia, lightly edited, and converted from first-person.

24 June 2007

• curprev 15:4315:43, 24 June 2007‎ MitchellNCharity talk contribs‎ m 5,507 bytes +69‎ →‎LRGB->RGB utility fuction: tweak, add twiddles.
• curprev 15:4315:43, 24 June 2007‎ MitchellNCharity talk contribs‎ 5,438 bytes +344‎ →‎Todo: Describe need for a L RGB->L (discard L)ab->RGB python utility function.
• curprev 15:2015:20, 24 June 2007‎ MitchellNCharity talk contribs‎ 5,094 bytes +87‎ →‎For the artist: made existance of a Munsell palette more explicit
• curprev 14:4914:49, 24 June 2007‎ MitchellNCharity talk contribs‎ 5,007 bytes +358‎ Added links to Munsell. And a "For the artist" section, with start of 'color selection' (needs expanding).
• curprev 13:5813:58, 24 June 2007‎ MitchellNCharity talk contribs‎ 4,649 bytes +207‎ →‎Todo: add 'display simulator' and 'color selection/pickers'.

23 June 2007

• curprev 23:2823:28, 23 June 2007‎ MitchellNCharity talk contribs‎ 4,442 bytes +1‎ →‎For the programmer: Low saturation thin lines need not be colored to have color artifacts in "color mode".
• curprev 22:5122:51, 23 June 2007‎ RafaelOrtiz talk contribs‎ m 4,441 bytes −1‎ minor
• curprev 22:3622:36, 23 June 2007‎ Sj talk contribs‎ 4,442 bytes +9‎ ambient sunlight matters more than backlight level
• curprev 22:3622:36, 23 June 2007‎ Sj talk contribs‎ 4,433 bytes −25‎ needs cleanup
• curprev 22:2922:29, 23 June 2007‎ MitchellNCharity talk contribs‎ 4,458 bytes −39‎ →‎for the programmer: Updated to reflect my current understanding.

20 June 2007

• curprev 21:0921:09, 20 June 2007‎ MitchellNCharity talk contribs‎ 4,497 bytes +12‎ Added cleanup tag. Now has Todo section.
• curprev 21:0821:08, 20 June 2007‎ MitchellNCharity talk contribs‎ 4,485 bytes +2,332‎ →‎Understanding the screen
• curprev 20:5420:54, 20 June 2007‎ MitchellNCharity talk contribs‎ 2,153 bytes +53‎ tweaked. Added definitional link to wikipedia.
• curprev 20:4720:47, 20 June 2007‎ MitchellNCharity talk contribs‎ 2,100 bytes +1,797‎ started "understanding the display"
• curprev 20:1120:11, 20 June 2007‎ MitchellNCharity talk contribs‎ 303 bytes +303‎ We've been needing a page dedicated to the display/screen for some time. Here is a stub.