I would have some remarks to say about the way THG tests LCD:
1) On State, Off state, CR, uniformity
The method you use for the CR is very good, however LCD manufacturers don't use it because the results a lower. They prefer the full white Vs. Full black Technique of the VESA standard.
You should add in this section the screen Viewing angle capacity (in other words untill what tilt angle compared to the screen on axis, you have a good viewing).
2) Color
The technique used is a good cheap technique, however aren't you afraid of having any Mura appearing due to when the prob is put in contact with the screen.
You should also include the color dispersion at different viewing angles (ie I'm watching a movie on my screen, if I am alone it is ok since I look at the screen on axis, however if we are several, there can be strange results), I have often seen screens with a red pattern but at certain viewing angle they would be green.
3) Response Time.
Manufacturers always talk in average, for example for a InterGray to Gray of 64x64, we can have an average of 3ms but a lower value of 0.8ms and a max of 20ms. What whould be interesting would be the mean error on Rising or falling.
Nota: For you measurement Technique, the probe you use for measuring can have a little more distance with the screen, since you measure the High versus low value of the probe.
About OverDrive technology, I don't think it is very usefull for the End user, since what interest us is when the color is stabilized. However for manufacturer such as AUO, CMO, SAMSUNG, etc... they are just interested about the results defined by the Vesa Standard T90%-T10%.
4) Conclusion:
You need to add some features about viewing angle (for CR or color), on CRTs we didn't care but for LCDs, it is a big deal.
Other interesting points would be about Image Sticking (I take a camera, I measure a chess board pattern, I invert the chess board and re-measure then compare the results).
1) On State, Off state, CR, uniformity
The method you use for the CR is very good, however LCD manufacturers don't use it because the results a lower. They prefer the full white Vs. Full black Technique of the VESA standard.
You should add in this section the screen Viewing angle capacity (in other words untill what tilt angle compared to the screen on axis, you have a good viewing).
2) Color
The technique used is a good cheap technique, however aren't you afraid of having any Mura appearing due to when the prob is put in contact with the screen.
You should also include the color dispersion at different viewing angles (ie I'm watching a movie on my screen, if I am alone it is ok since I look at the screen on axis, however if we are several, there can be strange results), I have often seen screens with a red pattern but at certain viewing angle they would be green.
3) Response Time.
Manufacturers always talk in average, for example for a InterGray to Gray of 64x64, we can have an average of 3ms but a lower value of 0.8ms and a max of 20ms. What whould be interesting would be the mean error on Rising or falling.
Nota: For you measurement Technique, the probe you use for measuring can have a little more distance with the screen, since you measure the High versus low value of the probe.
About OverDrive technology, I don't think it is very usefull for the End user, since what interest us is when the color is stabilized. However for manufacturer such as AUO, CMO, SAMSUNG, etc... they are just interested about the results defined by the Vesa Standard T90%-T10%.
4) Conclusion:
You need to add some features about viewing angle (for CR or color), on CRTs we didn't care but for LCDs, it is a big deal.
Other interesting points would be about Image Sticking (I take a camera, I measure a chess board pattern, I invert the chess board and re-measure then compare the results).
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