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US 12,494,186 B2Granted
Device and method for measuring overshoot without distortion in display
AssigneeLG Electronics Inc.
InventorsDokyun Kim, Seunghyun Yoo
Life of this patent
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Abstract
The present disclosure provides a method and a device for accurately determining a driving level of overdrive by accurately determining a reference luminance for measuring an overshoot degree of a display device. The present disclosure provides a device and a method for accurately determining the driving level of the overdrive by accurately determining the reference luminance using only a rise slope before overshoot occurs and an overshoot slope purely contributed by the overshoot when measuring the overshoot degree.
Claims15
A method for operating a display device, the method comprising:
- outputting a test motion picture by a display panel of the display device;
- receiving, from a camera device configured to capture the output test motion picture, information of a graph of a luminance sensed by the camera device for a number of camera pixels of the camera device in relation to the test motion picture, wherein an x-axis of the graph indicates the number of camera pixels and a y-axis of the graph indicates a value of the luminance, and the graph includes a first portion composed only of a rise slope before overshoot occurs, and a second portion in which the rise slope and an overshoot slope are combined;
- determining a first slope value for the rise slope in the first portion of the graph;
- determining a second slope value for the combination of the rise slope and the overshoot slope in the second portion of the graph;
- determining a third slope value for the overshoot slope by subtracting the first slope value from the second slope value;
- determining an LH value of a first basic luminance based on the third slope value, wherein the LH value corresponds to a y-axis value for a specific x-axis value on a line extended from a highest point of the second portion of the graph based on the third slope value, and the specific x-axis value corresponds to the number of camera pixels at a starting point of the second portion of the graph;
- determining an overshoot value related to the overshoot based on the LH value;
- determining an overdrive value related to the overshoot based on the overshoot value;
- and
- performing overdrive based on the overdrive value by a display driver of the display device.
7 more elements
A display device comprising:
- a display panel;
- a display driver;
- a transceiver;
- a memory;
- and
- at least one processor,
- wherein the at least one processor is configured to
- output a test motion picture by the display panel,
- receive, from a camera device configured to capture the output test motion picture, information of a graph of a luminance sensed by the camera device for a number of camera pixels of the camera device in relation to the test motion picture, wherein an x-axis of the graph indicates the number of camera pixels and a y-axis of the graph indicates a value of the luminance, and the graph includes a first portion composed only of a rise slope before overshoot occurs, and a second portion in which the rise slope and an overshoot slope are combined,
- determine a first slope value for the rise slope in the first portion of the graph,
- determine a second slope value for the combination of the rise slope and the overshoot slope in the second portion of the graph,
- determine a third slope value for the overshoot slope by subtracting the first slope value from the second slope value,
- determine an LH value of a first basic luminance based on the third slope value, wherein the LH value corresponds to a y-axis value for a specific x-axis value on a line extended from a highest point of the second portion of the graph based on the third slope value, and the specific x-axis value corresponds to the number of camera pixels at a starting point of the second portion of the graph,
- determine an overshoot value related to the overshoot based on the LH value,
- determine an overdrive value related to the overshoot based on the overshoot value, and
- perform overdrive based on the overdrive value by the display driver.
13 more elements
A control device for controlling a display device, comprising:
- at least one processor;
- and
- at least one memory operably accessible by the at least one processor,
- wherein the at least one memory stores instructions for performing operations, which when executed by the at least one processor, causes the at least one processor to perform the operations that include
- outputting a test motion picture by a display panel of the display device;
- receiving, from a camera device configured to capture the output test motion picture, information of a graph of a luminance sensed by the camera device for a number of camera pixels of the camera device in relation to the test motion picture, wherein an x-axis of the graph indicates the number of camera pixels and a y-axis of the graph indicates a value of the luminance, and the graph includes a first portion composed only of a rise slope before overshoot occurs, and a second portion in which the rise slope and an overshoot slope are combined;
- determining a first slope value for the rise slope in the first portion of the graph;
- determining a second slope value for the combination of the rise slope and the overshoot slope in the second portion of the graph;
- determining a third slope value for the overshoot slope by subtracting the first slope value from the second slope value;
- determining an LH value of a first basic luminance based on the third slope value, wherein the LH value corresponds to a y-axis value for a specific x-axis value on a line extended from a highest point of the second portion of the graph based on the third slope value, and the specific x-axis value corresponds to the number of camera pixels at a starting point of the second portion of the graph;
- determining an overshoot value related to the overshoot based on the LH value;
- determining an overdrive value related to the overshoot based on the overshoot value;
- and
- performing overdrive based on the overdrive value by a display driver of the display device.
11 more elements
Dependencies are inferred from the claim text.