Back to results
US 11,956,872 B1Granted
Display device for alleviating flicker phenomenon and pulse modulator included in the same
AssigneeTLI Inc.
InventorJu Hyun Park
Life of this patent
Estimating the term…
Abstract
In a display device according to an embodiment, subframes having the same number of active unit time(s) are distributed. As a result, according to the display device of the disclosure, the flicker phenomenon may be alleviated.
Claims15
A display device comprising:
- a display panel including a light emitting element, wherein the light emitting element emits light with brightness according to a total amount of current flowing in the light emitting element during a unit frame;
- a data driver that allows current to flow through the light emitting element of the display panel for a time corresponding to an activation width of a modulation signal;
- and
- a pulse width modulator that generates the modulation signal with modulating display data of the light emitting element of the display panel during the unit frame, wherein the activation width of the modulation signal corresponds to a data value of the display data, wherein
- the unit frame includes 1-st to n-th subframes which are sequentially progressed,
- each of the 1-st to n-th subframes is a number ‘p’ of unit times,
- each of the unit times corresponds to a corresponding unit data value of the display data,
- the activation width of the modulation signal in the i-th subframe is associated with whether an integer value of an estimated cumulative error of the i-th subframe is equal to the integer value of the estimated cumulative error of the (i−1)-th subframe,
- the estimated cumulative error of the i-th subframe is defined by {(i*r+e)/n},
- ‘n’ is a natural number greater than or equal to ‘4’,
- ‘p’ is a natural number greater than or equal to ‘2’,
- ‘i’ is a natural number between ‘1‘ and’n’,
- ‘r’ is a remainder obtained by dividing the data value of the display data by ‘n’,
- ‘r’ is an integer between ‘0‘ and’(n−1)’, and
- ‘e’ is an arbitrary number.
12 more elements
A pulse width modulator comprising:
- a data storing part that stores display data;
- and
- a pulse width modulating part that receives the display data provided from the data storing part, and generates a modulation signal with modulating the display data during a unit frame, wherein an activation width of the modulation signal corresponds to a data value of the display data, wherein
- the unit frame includes 1-st to n-th subframes which are sequentially progressed,
- each of the 1-st to n-th subframes is a number ‘p’ of unit times,
- each of the unit times corresponds to a corresponding unit data value of the display data,
- the activation width of the modulation signal in the i-th subframe is associated with whether an integer value of an estimated cumulative error of the i-th subframe is equal to the integer value of the estimated cumulative error of the (i−1)-th subframe,
- the estimated cumulative error of the i-th subframe is defined by {(i*r+e)/n},
- ‘n’ is a natural number greater than or equal to ‘4’,
- ‘p’ is a natural number greater than or equal to ‘2’,
- ‘i’ is a natural number between ‘1‘ and’n’,
- ‘r’ is a remainder obtained by dividing the data value of the display data by ‘n’,
- ‘r’ is an integer between ‘0‘ and’(n−1)’, and
- ‘e’ is an arbitrary number.
11 more elements
Dependencies are inferred from the claim text.