In step 43 the storing of said gray level values in said memory element is initiated and in step 44 the steps above are repeated of quality of display is not optimal.ġ. A method to adapt gamma curve and phase table data, for a passive color LCD display driven by a combination of pulse width modulation and frame rate control so as to generate gray scale images, wherein a predetermined gradation level is obtained in a sequence of COM periods, wherein in each COM period, the gradation level is represented by pulse width modulation as defined by corresponding phase table data, comprising: as well as any special effects across the panel. This allows removal of unwanted visual artifacts like flicker, shimmer, etc.
The distribution of a specific input grey level into 4 PWM values (one for each of the FRC periods in the example above) depends not only the optical color but also the 'visual' response.
#Lcd gamma control reference driver
The controller allows the user to input data into the display driver IC. This input device can be any computer, microprocessor, etc based device. In step 42 the gray level values for every FRC period provided as input for said input device. In step 41 the number of gray levels and number of FRCs are defined. Such a memory element could be registers or a RAM. Step 40 illustrates the provision of an input device, a processor, a color display based on primary colors, and a memory element, which can be updated anytime. Fig.4 shows a flowchart of a method to perform anytime an optimal adaptation of gamma curve correction data and phase table data to an LCD CSTN display.
Kombinierte Gamma- und Phasentabellendaten in einem Speicher für LCD-CSTN-Anzeigenĭonnées de table gamma et de phase combinées dans une mémoire pour affichages CSTN LCDĪT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR International Patent Classification (IPC): G09G 3/36 (2006.01)Ĭombined gamma and phase table data in memory for LCD CSTN displays
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