Development of a resistivity division driving method for the vertically placed RGB pixels of the eight-domain thin-film-transistors liquid crystal display

Figures & data

Figure 1. Diagram of the MB7 structure: (a) conventional array and (b) vertically placed pixel array.

Figure 2. CS type for the MB7 structure.

Figure 3. Eight-domain driving for the improvement of the off-axis image quality in the VA mode.

Figure 4. Pixel circuit for the RD type: (a) equivalent circuit and (b) diagram for operation.

Figure 5. Simulation schematic and charging properties for the RD type: (a) schematic for simulation and (b) charging properties of the subpixels.

Figure 6. Voltage ration simulation results of subpixel B: (a) voltage ratio from gray in the Vcst level and (b) Vcst influence from the RD-TFT size.

Table 1. Prototype evaluation results.

Area ratio^a	Low-TFT (%)^b	Transmittance (%)	GDI
1:1.5	90	100	0.297
	80	93	0.276
	70	90	0.240
1:1.25	80	100	0.310
	70	95	0.279
1:1	90	107	0.355
	80	100	0.320
	70	97	0.316
^aHigh-subpixel area:low-subpixel area.
^bLow-TFT% = ((Low TFT channel width)/(low-TFT channel width + RD TFT channel width)) × 100.

Figure 7. Off-axis gamma comparison.

Table 2. Properties comparison among the operation types of the VA mode.

32 in. HD TV	PVA	RD-SVA	CS-SVA
MB type	MB 7	MB 7	MB 4
Number of domains	four-domain	eight-domain	eight-domain
IZO pattern	Chevron	u-Slit	u-Slit
Transmittance	100%	117%	115%
GDI	0.40	0.30	0.28
Number of D-ICs	2 EA	2 EA	6 EA