R9001440/9
GRAPHICS
TCR Adjustment procedure
Date:10/02/2000
6300
18
TCR Adjustment procedure
TCR Program Manual
Program version 1.60
Program version 1.60
Type
Art. number
G6300
R900144X
2. Color tracking.
Color tracking (the color temperature is maintained over the grey scale) is realized by
measuring the transmission curve of the LCDs and by loading the correct correction
curves into the projector. As a result we will have a correct gamma curve for each
color, and hence a correct color tracking.
3. Color temperature adjustment.
In order to arrive at the right color temperatures (3200K for broadcast, 5400K for film,
6500K for video and 9300K for computer) it is necessary to do a correct balancing of
red, green and blue. From the green reduced white, lying close to the 6500K point,
still a digital fine tuning of the color balance will be necessary to exactly arrive on the
6500K point, and also on the other color temperatures 3200K, 5400K, 9300K.
Software validity
Reason for TCR
The TCR Program will implement the following features:
1. Analog green reduction.
The normal white in a projector with fully driven LCD panels is too green for video
applications. To achieve a white which is more appropriate (e.g. 6500K) mainly the
maximum light output of the green panel has to be reduced. In the TCR program the
largest part of this reduction will be done on the analog LCD driver, so that only the
driving voltage interval of the green panel will be reduced without losing the number of
grey levels (8 bit grey levels are kept). In practice the driving of the green panel will be
reduced until the y color coordinate of the internal white image is close to 0.34.
Note: There is no analog green reduction necessary for the BG9300. Due to an internal
resistor network in the panels and dithering to 10 bit grey levels the number of grey
levels is already much higher than for other projectors.
Related Item
Preparation
Allow the projector to warm up during 30 minutes. Put the lamp into the highest power
mode. Close the hoods on the projector. The table mount configuration is preferred.
Darken the room before the measurements start.
Adjustment procedure Preset Input Balance
The TCR Program requires
- A PC (486, Pentium 133, ) with 2 COM ports and DOS.
- The TCR.EXE program and the EGAVGA.BGI file for the graphics.
- A color meter: LMT (C1210 or higher) or Thoma (TMF6 or TMF6 II). From version
1.11 and higher the TCR Program also supports a Minolta CS1000 color meter.
- A pattern generator or video generator able to show a full black and full white image
and if possible a grey image with a correct 30% and 60% signal level.
- RS232 connection from the PC to the projector and to the color meter.
