The 5.7″ QVGA (320×240) is an older standard than the 4.3″ display, and that’s why the 5.7″ has a lower resolution. The lower the resolution, the higher the brightness, so the 5.7″ does have one redeeming feature. We favor “standard” sizes and resolutions as much as possible for long-life availability. There are no standard bodies for small TFT displays, only form factors and resolutions adopted by multiple vendors.
You have several options for higher resolution, and these are all powered by our SLCD5 controller. These options are very similar in resolution (dots per inch (dpi) or pixel pitch).
Reference 4.3″ dot pitch 0.198mm = 128dpi
- 5.7″ VGA (640×480) dot pitch 0.180mm = 141dpi (tighter than the 4.3″)
- 6.4″ VGA (640×480) dot pitch 0.204mm = 124dpi
- 7″ WVGA (800×480) dot pitch 0.190mm = 134dpi
All of the above are available from multiple panel vendors.