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US 2006/0132406 A1Published application
Display having controllable gray scale circuit
AssigneeChimei Innolux Corporation
InventorsMingchia Pan, Mingjhen Sie, Chincheng Tsai
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Abstract
A display that includes a circuit to receive pixel data and to generate a first set of gray-scale voltages based on the first set of reference voltages to drive pixel circuits to display respectively different gray-scale levels during a first time period in accordance with the pixel data, and generate a second set of gray-scale voltages based on a second, different set of reference voltages to drive the pixel circuits to display a common gray-scale level during a second time period. For example, the common gray-scale level can be a black level.
Claims25
An apparatus comprising:
- a circuit to receive pixel data and to
- generate a first set of gray-scale voltages based on the first set of reference voltages to drive pixel circuits to display respectively different gray-scale levels during a first time period in accordance with the pixel data, and
- generate a second set of gray-scale voltages based on a second, different set of reference voltages to drive the pixel circuits to display a common gray-scale level during a second time period.
An apparatus comprising:
- a circuit to generate reference voltages for use
- in a first state of the circuit, for generating gray-scale voltages to drive pixel circuits to display respectively different gray-scale levels, and
- in a second state of the circuit, for generating gray-scale voltages to drive the pixel circuits to display a common gray-scale level;
- wherein the circuit comprises one or more data drivers that drive data lines using the gray-scale voltages, the data lines being coupled to the pixel circuits..
1 more element
An apparatus comprising:
- a circuit to drive a pixel to a gray-scale level using an analog gray-scale voltage that is selected from among a set of analog gray-scale voltages based on received pixel data associated with the pixel, and change the number of different gray-scale voltages from which the analog voltage can be selected during different time periods;
- wherein during a certain period of time, the set of analog gray-scale voltages have values such that the data driver drives the pixel to display a common gray-scale level regardless of the digital pixel data.
A display comprising:
- an array of pixel circuits;
- a controllable reference voltage generator to generate a first set of reference voltages during a first time period and a second set of reference voltages during a second time period, the controllable reference voltage generator comprising a voltage divider coupled to a switch that is switched between the first period and the second period, the voltage divider dividing a voltage difference during the first time period to generate the first set of reference voltages;
- and
- one or more data drivers to receive pixel data from a host device and to
- generate a first set of gray-scale voltages based on the first set of reference voltages to drive the pixel circuits to display respectively different gray-scale levels during the first time period in accordance with the pixel data, and
- generate a second set of gray-scale voltages based on the second set of reference voltages to drive the pixel circuits to display a common gray-scale level during the second time period.
3 more elements
A method comprising:
- causing pixels of a display to show a common gray-scale level at times when pixel data is being received that would otherwise cause the pixels to display different gray-scale levels.
A method comprising:
- generating an image having a uniform gray-scale level on a display by controlling gray-scale voltages used to drive pixel circuits of the display, the controlling of the gray-scale voltages being independent of pixel data sent by a host device to the display.
A method comprising:
- providing gray-scale voltages on signal lines;
- for each pixel of a display, selecting one of the signal lines and use the gray-scale voltage on the selected signal line to determine a gray-scale level for the pixel;
- during a first time period, controlling the gray-scale voltages provided on the signal lines to cause the pixels to show a common gray-scale level;
- and
- during a second time period, controlling the gray-scale voltages provided on the signal lines to cause the pixels to show distinct gray-scale levels.
2 more elements
A method comprising:
- generating a black image on a display during a certain period of time by controlling reference voltages that are used by one or more digital-to-analog devices of the display to generate analog gray-scale voltages for determining the gray-scale levels shown by pixels of the display.
Dependencies are inferred from the claim text.