When I put a lower series resistor in the"LED Backlight" (light source : white type 15 elements, about 4mm width, about 100mm length) and limit the current to about 70mA~80mA to suppress the white brightness, it will be better than before. The color display is fairly easy to see. (Fig_2 [click] Digital camera" Panasonic DMC-FX01" does not show so clearly)
However, the "contrast" is still lower than that of the ""WVGA-TFT-LCD screen" and "VGA-TFT-LCD screen", and it is necessary to adjust with the "Fn+Ins / Fn+Del keys" in the early and late stages of operation.
(In addition, with the current method, brightness adjustment by"Fn+End / Fn+Home keys" is not possible)
Unfortunately, due to the low level of (my) skill in applying "(glued) front Polarizing Film", a noticeable "foam patterns" remained this time as well.
(It seems that it is better to work in a bathroom with little dust, but since I have to check the front and back of the "Polarizing Film" on the actual machine's face, check the angle, and cut it, it is troublesome to do it on the dusty desk. Make mistakes.)
−−−−−−−−−−−−−−−−−−−−−−−−
++++ Good or bad color ++++
In " No.10:Katsuragi ", the "inverter power supply" (about 10.5V) was directly applied without limiting the current in the LED array of the backlight source. (It is estimated that the LED array current is about 130mA to 150mA)
Since "blue" is too strong, one "backward Polarizing Film / Polarizing Plate" is inserted in front of the "Light Guide Plate" to suppress it.
In this " No.6:Matsu ", I put a current limiting resistor (about 11 ohms) in series to suppress the LED current and lower the blue brightness.
As a guide, I adjusted it so that the "whiteness of the castle's wall" and the "blueness of the sky" stand out, and it became quite favorable. (Fig_3)
On the other hand, "yellow" is not enough ! "Green" is also a little short ! ... "Contrast" would be something like this for STN. (Fig_4 [click])
+++ Compared to TFT-LCD +++
I compared the" Color FSTN-LCD " screen and the " Color WVGA-TFT-LCD " screen (I adjusted it best), but it was still remarkable. There is a difference. (Fig_5)
In The "FSTN-LCD", it is difficult to make "brightness" and "contrast" compatible.
If I want "brightness", I have to reduce "contrast".
In the "TFT-LCD", "contrast" is sufficient, so "brightness" may be able to adjust if I want.
(Although it is not necessary at present)
I've been pursuing updates to the "STN-LCD" corrupted screen in two ways, both with "meaning", but each with "difficulty"...
If we want to restore the original " PC110 " in its original shape, we need to replace it with "Color FSTN-LCD".
However, we don't think the same kind of " STN-LCD module " is available anymore (at the individual level).
The limit is probably "Compensation Film", even if we can get it. The real intention is that we also want the "Lens sheets".
For that, advanced work and processing technology (dirty film peeling, new film gluing, etc.) is required.(If the film gluing fails, some bubble patterns may be remained. Fig_6 [click])
On the other hand," TFT-LCD modules " are relatively easy to obtain these days.
However, some "relay board" and some "switching program (for DOS , Win95,98 )" are required.
In addition, the front frame needs to be processed / adjusted or some new work are required, and the original shape of " PC110 " cannot be restored.
I have multiple units, so I'm thinking of updating each screen (As the individuality of each machine, and as I wish) to maintain and save each one. w^^;
