Screen Size

[petehead]

Originally Posted by TheBundo

Almost everything we have printed on paper, even from your computers printer, is "4 color printing"

If you've ever worked in a pre-press environment or looked at a Pantone swatch book you know that 4 color process printing definitely has limitations in accurately producing many colors. Printing is a totally different ballgame, though. You are producing color using reflected available light which is totally different from a backlit LCD panel.

[R2D2 631]

Does anyone know if the diamond and rapheal screens are gonna be scratch resistance like iphone ?

[Mkostera1]

Originally Posted by cjv631

Does anyone know if the diamond and rapheal screen are gonna be scratch resistance like iphone ?

I was also wondering this

[Staychizzo]

i know this been around somewhere, but i seen different answers everywhere! is the screen capacitive or a resistive touchscreen????

[gobmonster]

Originally Posted by Staychizzo

i know this been around somewhere, but i seen different answers everywhere! is the screen capacitive or a resistive touchscreen????

The display is resistive, but the "buttons" under the display are multi touch capacitive

Think of it as having two touchscreens on one phone, one covers the pixels and another below that

[TheBundo]

Originally Posted by petehead

If you've ever worked in a pre-press environment or looked at a Pantone swatch book you know that 4 color process printing definitely has limitations in accurately producing many colors. Printing is a totally different ballgame, though. You are producing color using reflected available light which is totally different from a backlit LCD panel.

Go look up real close at a tube style color TV. Only 3 colors, I think, RGB ?

[petehead]

Originally Posted by TheBundo

Go look up real close at a tube style color TV. Only 3 colors, I think, RGB ?

Yes, indeed. Not to stray too far off topic, but take a look at this: http://www.dlp.com/projectors/brilliant_color.aspx TI is using RGB and CMY(with K being the absence of light).

[pflatlyne]

Originally Posted by TheBundo

Go look up real close at a tube style color TV. Only 3 colors, I think, RGB ?

THis is not what is being discussed when we say 65536 colors. Most (all?) color displays are RGB at heart. Each pixel is created from a red,green and blue subpixel. In early systems, like CGA,the monitor had a digital input. What that means is that each color could be either on or off. That makes a total of 16 different combinations,or 16 colors.
More modern vga type CRT monitors have analog inputs and can display an infinite number of colors per channel. The video display hardware however is digital in nature and deterimines the number of colors. If there are 8 bits per color,thats 256 colors per channel or a total of over 16 million colors. Many adapters support 32bit color in several variants,such as 10bits per pixel with 2bit transparency,or 8bits per channel with 8bit transparency.
Modern monitors however are mostly LCD displays. These displays are digital by nature. The display itself will be able to handle a particular bit depth. Some displays will handle 8bits per pixel (24bit color) others will handle only about 65k colors. In many cases you wont notice the difference. Ive seen LCD projection TVs that look very good under most circumstances yet only display 65536 colors. With monitors and TVs analog video,or higher bit depth digital video (DVI or HDMI) are converted down to whatever the LCD can display.
64 thousand or 24 million colors sounds pretty good so you might wonder why alot of scanners have 10 or 12bits or more per pixel of color resolution (as well as many professional video and image formats) The reason is that under some circumstances you will notice the difference. In a normal photograph or tv show you might not notice. However if you make a gradient on screen,from light green to dark green,you will notice some banding. In fact,on the cheaper TVs with lower color resolution displays you see this in certain places if you know what to look for. Look for dark scenes with alot of lense flare effects. In these scenes you will see color banding around the lights. In 24bit color its not as apperant,but under some circumstances it can be seen. (but you really have to look)
On a pocket PC you might ask whats the point of being able to display any of 24 million colors when the display only has about 300,000 pixels. The problem is not displaying 24 million colors but displaying for instance 256 levels of red to make the shadows on a rose petal look good. While it woul d be nice to have a 24 bit display,the display on the pocket PCs is fine. I rarely notice any of these issues,and even if I do its really not that bad.

[PdaOd]

Vision uses tristimulous color perception. This means color is perceived as relative intensities of red, green and blue. These color ranges are broad and have slopes that overlap at the boundaries. This is how we can have a RGB display system for additive color (or CYM for subtractive) and see a range of colors. For example the wavelength of light we perceive as yellow falls on the overlap of red and green perception and registers as equal intensities of red and green. We can perceive that same color by using a display that is emitting red and green light with equal intensity. It's not really making the single wavelength yellow light but rather fooling our perception into thinking that it is. This also shows the limitations of color perception in that we can't tell if the yellow is a pure wavelength of light or a mixture of wavelengths.

The spectral width of the red, green and blue light from the display will determine how deep the colors can be. If the red has energy in the green and blue spectum, then the saturation of the red is reduced. The quality of the color filters in a LCD display determine whether the display looks dull or vibrant.

Another element of visual perception is that it is logarithmic to intensity, which is also true of aural perception. This means that vision is more sensitive in darker areas and less in brighter areas. LCDs have a more or less linear change of intensity in relation to the signal that is fed to it. When the amount of bits are reduced we start to see the quantized steps as banding in the darker areas.

The iphone displays are IMO superior to the ones HTC uses. Video and pictures looks good. Unfortunately for the iphone all that glitters is not gold.