Sub-Space Compensation Model for Accurate Colorimetric Characterization of Liquid Crystal Displays

Support vector machine-based method for colorimetric characterization of computer-controlled liquid crystal displays

“…To correct or compensate for these two characteristics, some colorimetric characterization models for LCD-based monitors are proposed, such as the piecewise linear assuming variation in a chromaticity (PLVC) model, 15 piecewise partition model, 16 and sub-space compensation model. 17 In 1980, Farley and Gutmann first proposed the PLVC model, which is widely used in CRT [18][19][20] and LCD monitors. 21 With the development of machine learning technology, the machine learning models are increasingly used in colorimetric characterization.…”

Color characterization model for OLED displays with crosstalk effects

“…Channel independence, however, does not always apply to all displays. For some displays, the adjustment of the digital signal value of one channel affects the tristimulus values produced by the other two channels (known as “crosstalk effect”), making the above models inapplicable 2–8 . The crosstalk effect happens to many modern display technologies, such as liquid crystal displays (LCD), organic light‐emitting diode (OLED) displays, and polymer LED displays 9–11 .…”

“…The crosstalk component P can be modeled in different ways. In the Piecewise Partition (PP) model, 2 the Polynomial Compensation (PC) model, 5 the Compensation Error (PCE) model, 7 the Two‐primary Crosstalk (TPC) model, 12 the Partition Sub‐space Compensation (SC) model, 4 and the two LCD characterization models, 3,6 the polynomial functions are modeled with different orders and terms. In order to further improve the model accuracy, a 3D look‐up‐table (LUT) or multiple 2D LUTs with interpolations were also proposed 6,8,13 .…”

“…For some displays, the adjustment of the digital signal value of one channel affects the tristimulus values produced by the other two channels (known as "crosstalk effect"), making the above models inapplicable. [2][3][4][5][6][7][8] The crosstalk effect happens to many modern display technologies, such as liquid crystal displays (LCD), organic light-emitting diode (OLED) displays, and polymer LED displays. [9][10][11] As illustrated in Figure 1A, when a voltage is applied on an OLED cell, the holes from the anode go through the hole transport layer (HTL) and meet the electrons from the cathode on the emitting layer, resulting in the current flows to produce light.…”

“…Past studies [2][3][4][5][6][7][8]12,13 proposed several models to consider the crosstalk effects, which can be described using Equation (1). In these models, the tristimulus values X 0 Y 0 Z 0 derived based on the assumption of channel independence are modified using a component P(R,G,B) characterizing the crosstalk effects.…”