Method of dimming a light source and display apparatus for performing the method
First Claim
1. A method of dimming a light source module, comprising:
- generating a first group of first to k-th driving signals and a second group of first to m-th driving signals, based on an image signal;
driving first to k-th light source blocks of a first light emitting module using the first group of first to k-th driving signals during a first period of a reference period, and driving first to m-th light source blocks of a second light emitting module using the second group of first to m-th driving signals during a second period of the reference period; and
determining the duration of the first period and the duration of the second period using a luminance ratio between a first partial image displayed on a portion of a display panel adjacent to the first light emitting module and a second partial image, which is different from the first partial image, displayed on a portion of the display panel adjacent to the second light emitting module,wherein the light source module comprises a light guide plate, the first light emitting module disposed at a first edge of the light guide plate, and the second light emitting module disposed at a second edge of the light guide plate being disposed substantially opposite to the first edge of the light guide plate,wherein k and m are natural numbers, andwherein a first selecting signal turns on a first switching element connected to the first light emitting module at the start point of the first period which is the start point of the reference period, and turns off the first switching element before the end point of the first period, anda second selecting signal turns on a second switching element connected to the second light emitting module at the start point of the second period which is the end point of the first period and turns off the second switching element before the end point of the second period which is the end point of the reference period.
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Abstract
A method of dimming a light source module including a light guide plate, a first light emitting module including first to k-th light source blocks, wherein the first light emitting module is disposed on a first edge of the light guide plate, and a second light emitting module including first to m-th light source blocks, the second light emitting module being disposed on a second edge of the light guide plate, the second edge disposed opposite the first, the method including; generating a first group of driving signals and a second group of driving signals based on an image signal and driving the first to k-th light source blocks using the first group of the driving signals during a first period in a reference period and driving the first to m-th light source blocks using the second group of driving signals during a second period in the reference period.
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Citations
19 Claims
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1. A method of dimming a light source module, comprising:
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generating a first group of first to k-th driving signals and a second group of first to m-th driving signals, based on an image signal; driving first to k-th light source blocks of a first light emitting module using the first group of first to k-th driving signals during a first period of a reference period, and driving first to m-th light source blocks of a second light emitting module using the second group of first to m-th driving signals during a second period of the reference period; and determining the duration of the first period and the duration of the second period using a luminance ratio between a first partial image displayed on a portion of a display panel adjacent to the first light emitting module and a second partial image, which is different from the first partial image, displayed on a portion of the display panel adjacent to the second light emitting module, wherein the light source module comprises a light guide plate, the first light emitting module disposed at a first edge of the light guide plate, and the second light emitting module disposed at a second edge of the light guide plate being disposed substantially opposite to the first edge of the light guide plate, wherein k and m are natural numbers, and wherein a first selecting signal turns on a first switching element connected to the first light emitting module at the start point of the first period which is the start point of the reference period, and turns off the first switching element before the end point of the first period, and a second selecting signal turns on a second switching element connected to the second light emitting module at the start point of the second period which is the end point of the first period and turns off the second switching element before the end point of the second period which is the end point of the reference period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A display apparatus comprising:
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a display panel; a light source module comprising a first light emitting module including first to k-th light source blocks and disposed at a first edge of the display panel, and a second light emitting module including first to m-th light source blocks and disposed at a second edge of the display panel, the second edge being disposed substantially opposite to the first edge; a first switching element connected to the first light emitting module; a second switching element connected to the second light emitting module; and a light source driver which generates a first group of first to k-th driving signals to drive the first to k-th light source blocks of the first light emitting module during a first period of a reference period, and which generates a second group of first to m-th driving signals to drive the first to m-th light source blocks of the second light emitting module during a second period of the reference period, wherein k and m are natural numbers, wherein the light source driver comprises a cycle decision part which determines the duration of the first period and the duration of the second period using a luminance ratio between a first partial image displayed on a portion of the display panel adjacent to the first light emitting module and a second partial image, which is different from the first partial image, displayed on a portion of the display panel adjacent to the second light emitting module, and wherein a first selecting signal turns on the first switching element at the start point of the first period which is the start point of the reference period, and turns off the first switching element before the end point of the first period, and a second selecting signal turns on the second switching element at the start point of the second period which is the end point of the first period and turns off the second switching element before the end point of the second period which is the end point of the reference period. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification