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US 12,743,987 B2Granted
Rate-dependent switchable equalizers for display devices
AssigneeTexas Instruments Incorporated
InventorsYonghui Tang, Charles Michael Campbell, Mustafa Ulvi Erdogan, Douglas Edward Wente, Yanli Fan
Life of this patent
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Abstract
An example apparatus includes: a first input and a second input, a first equalizer with a third input, a fourth input, and a fifth input, the third input coupled to the first input, the fourth input coupled to the second input, a second equalizer with a sixth input, a seventh input, and an eighth input, the sixth input coupled to the first input, the seventh input coupled to the second input, and a controller coupled to the fifth input and the eighth input.
Claims19
An apparatus comprising:
- a first equalizer having first and second data inputs, a control input, and first and second data outputs;
- a second equalizer having first and second data inputs, a control input, and first and second data outputs, the first data input of the second equalizer coupled to the first data input of the first equalizer, the second data input of the second equalizer coupled to the second data input of the first equalizer, the first data output of the second equalizer coupled to the first data output of the first equalizer, and the second data output of the second equalizer coupled to the second data output of the first equalizer;
- and
- a controller coupled to the control input of the first equalizer and the control input of the second equalizer, the controller having an input coupled upstream of the first and second equalizers;
- a look-up table coupled to the controller, wherein the look-up table includes a mapping of data rates and data rate controls;
- and
- interface circuitry configured to determine a data rate associated with a display data channel;
- wherein the controller is configured to:
- obtain a data rate control from the look-up table based on the data rate;
- and
- use the data rate control to select one of the first equalizer or the second equalizer to provide display data at the data rate to the display data channel.
8 more elements
An apparatus comprising:
- a display data source having a data output and a display data output;
- a controller having an input and first and second outputs, the input of the controller coupled to the data output of the display data source;
- a first equalizer having a data input, a data rate input, and an output, the data input of the first equalizer coupled to the display data output of the display data source, and the data rate input of the first equalizer coupled to the first output of the controller;
- and
- a second equalizer having a data input, a data rate input, and an output, the data input of the second equalizer coupled to the display data output of the display data source, the data rate input of the second equalizer coupled to the second output of the controller, and the output of the second equalizer coupled to the output of the first equalizer, wherein the controller is configured to:
- determine a data rate of data on the display data output;
- provide display data from the first equalizer while the second equalizer is turned off in response to a first determination that the data rate is a first data rate;
- and
- provide display data from the first equalizer and second equalizer in response to a second determination that the data rate is a second data rate greater than the first data rate.
6 more elements
A display system comprising:
- a first equalizer having first and second data inputs, a control input, and first and second data outputs;
- a second equalizer having first and second data inputs, a control input, and first and second data outputs, the first data input of the second equalizer coupled to the first data input of the first equalizer, the second data input of the second equalizer coupled to the second data input of the first equalizer, the first data output of the second equalizer coupled to the first data output of the first equalizer, and the second data output of the second equalizer coupled to the second data output of the first equalizer;
- and
- a controller coupled to the control input of the first equalizer and the control input of the second equalizer, the controller configured to, based on a data rate of display data at the data inputs of the first and second equalizers, select only the first equalizer to provide display data to a display device when the data rate is in a first range and select the first and second equalizers to provide the display data to the display device when the data rate is in a second range, the second range differing from the first range.
1 more element
Dependencies are inferred from the claim text.