I'm not Ray, but I'm sold on the LED backlights that are in the T series. I recently bought three of them, and they're great. My W500 is now 14 months old and the right hand side of the screen clearly takes longer to get bright--this is a CCFL.
The LEDs are a little blueish, but not so much that its obnoxious. They should last 100,000 hours or so, meaning the backlight could be taken out of a T system and put into another, which I think is neato. --STeve Andre' On Tuesday 19 January 2010 13:05:25 David Reid wrote: > So do you have a preferred option Ray? (between the CCFL and LED offered > by Lenovo?) > > -David > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of RayBay > Sent: Tuesday, January 19, 2010 11:53 AM > To: Stuart F. Biggar > Cc: Thinkpad Mailing List > Subject: Re: [Thinkpad] Specing a T500 backlight options > > Do not forget that the various lighting sytems emit enormous differences in > heat, and in long life, and in cost of replacements. > > The art of being wise is the art of knowing what to overlook. > > - -- --- ---- ----- ------ William James > > > On Tue, Jan 19, 2010 at 10:42 AM, Stuart F. Biggar < > > [email protected]> wrote: > > On Jan 19, 2010, at 9:51 AM, David Reid wrote: > > > Greetings List, > > > > > > Anyone care to comment as to pros/cons of the two backlighting > > > options?: > > > > > > > > > CCFL Backlight (Cold cathode fluorescent lamps) remains a common method > > > > for > > > > > backlighting an LCD screen. > > > > > > LED Backlight is a variant of LCDs which use light-emitting diodes to > > > > light > > > > > the LCD. LEDs typically use relatively less power, are mercury free, > > > > thus > > > > > the Greener choice. > > > > David, > > > > No experience with a T500. > > > > Note that there are a variety of LED backlights. The easy one is > > "white" LEDs with poor color. They basically use a blue (or sometimes > > UV) LED with phosphor coatings to get white light. Typically they > > have poor color (peaks in blue and red and relatively less green). > > There are better white LEDs with a wider color gamut - this allows > > the screen to display more colors correctly. Most white LED screens > > cannot represent the full color space. > > > > The top end LED backlight displays use discrete red-green-blue LEDs > > to more carefully represent the color space. I know of only one such > > notebook panel and Lenovo didn't use to offer it (17" 1920x1200 used > > in the HP Elitebook with "DreamColor" and some Dell 17" Precision > > and other notebooks). There may be others. These screens were > > expensive and required a high-end graphics card (Nvidia Quadro mobile). > > There are similar high-end good color LCD panels for desktops - again > > they are expensive (see HP 24" DreamColor monitor - about $2K vs about > > $550 for their next best 24" monitor). > > > > I note that there is a 95% gamut T500 screen available. I don't know > > if this is a white LED or RGB LED unit. If real RGB, it would probably > > be worth it if you desire good color rendition on the screen. > > > > Sometimes there is a tradeoff between brightness and color. The > > HP 24" DreamColor is dimmer than the 24" HP with CCFL but the > > color rendition is WAY better and the panel supports 10-bit per > > color with the correct video card. You choose what you want > > and then pay the freight ... > > > > Stuart > > > > PS - I'm now using an Apple MacBook Pro 17" with a white LED > > panel. Bright and efficient but color isn't great and off-angle color > > shift is worse than the old IPS CCFL panel in my now ancient T43p. > > I wish someone made a discreet RGB LED backlit IPS panel for > > notebooks but the cost would be high and the manufacturers have > > decided there isn't sufficient high end market to justify it. The > > notebook > > > DreamColor from HP is not IPS but the 24" DreamColor is and the 24" > > has better color and wider view angles. _______________________________________________ Thinkpad mailing list [email protected] http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
