KR-20260062188-A - DISPLAY DEVICE, ELECTRONIC DEVICE, AND DRIVING METHOD THEREOF

KR20260062188AKR 20260062188 AKR20260062188 AKR 20260062188AKR-20260062188-A

Abstract

The display device of the present invention includes: a compensation value correction unit that calculates final compensation values by applying weights based on input grayscales of an image frame to reference compensation values; and a timing control unit that generates output grayscales by applying the final compensation values to the input grayscales, wherein the compensation value correction unit is turned off based on the weights, and when the compensation value correction unit is turned off, the output grayscales are set to be the same as the input grayscales.

Inventors

황종광

Assignees

삼성디스플레이 주식회사

Dates

Publication Date: 20260507
Application Date: 20241025

Claims (20)

A compensation value correction unit that calculates final compensation values by applying weights based on the input grayscale of the video frame to reference compensation values; and It includes a timing control unit that generates output gradations by applying the final compensation values to the input gradations, and The above compensation value correction unit is turned off based on the above weights, and when the above compensation value correction unit is turned off, the output gradations are set to be the same as the input gradations, Display device.
In Article 1, The above compensation value correction unit is: A first weight calculation unit comprising generating first weights based on input brightness values, Display device.
In Article 2, Includes more memory, The above memory includes reference weights corresponding to reference brightness values, and The first weight calculation unit provides the reference weights corresponding to the input brightness value as the first weights when the input brightness value is the same as any one of the reference brightness values, and When the input brightness value is different from the reference brightness values, the first weight calculation unit interpolates reference weights corresponding to the two reference brightness values closest to the input brightness value, and provides the interpolated values as the first weights. Display device.
In Paragraph 3, The above compensation value correction unit is: A second weight calculation unit further comprising a second weight calculation unit that calculates second weights based on the above input gradations and the above first weights, Display device.
In Paragraph 4, The above first weights each correspond to reference grayscales, and The second weight calculation unit provides a first weight corresponding to the input grayscale as a second weight when the input grayscale is identical to any one of the reference grayscales, and The second weight calculation unit interpolates first weights corresponding to the two reference grayscales closest to the input grayscale when the input grayscale is different from the reference grayscales, and provides the interpolated value as the second weight. Display device.
In Article 5, The above compensation value correction unit is: A final reward value calculation unit further comprising calculating the final reward values by applying the second weights to the reference reward values. Display device.
In Article 6, The above compensation value correction unit is: Further comprising a turn-off trigger that determines whether the compensation value correction unit turns off based on the second weights mentioned above, Display device.
In Article 7, The above turn-off trigger turns off the compensation value correction unit when at least one of the second weights is less than or equal to the first reference value, Display device.
In Article 7, The above compensation value correction unit is: It further includes a counter that provides a count value by counting the number of second weights among the above second weights that are less than or equal to a first reference value, and The above turn-off trigger turns off the compensation value correction unit when the above count value is greater than the second reference value, Display device.
In Article 7, The above compensation value correction unit is: It further includes a representative grayscale calculation unit that calculates a representative grayscale of the above input grayscales, and The above turn-off trigger turns off the compensation value correction unit when the second weight corresponding to the representative grayscale among the second weights is less than or equal to the first reference value. Display device.
A step of receiving an image frame containing input gradations; A step of calculating final reward values by applying weights based on the above input grayscales to reference reward values; A step of generating output gradations by applying the final compensation values to the input gradations; A step of generating data voltages corresponding to the above output gradations; and The method includes the step of writing the above data voltages to pixels, The step of calculating the final compensation values is omitted based on the weights, and the output gradations are set to be identical to the input gradations. Driving method of a display device.
In Article 11, The step of calculating the above final compensation values is: A step comprising generating first weights based on input brightness values, Driving method of a display device.
In Article 12, The step of calculating the above final compensation values is: A step of receiving reference weights corresponding to reference brightness values; If the input brightness value is the same as any one of the reference brightness values, the step of providing the reference weights corresponding to the input brightness value as the first weights; and If the input brightness value is different from the reference brightness values, the method further includes the step of interpolating reference weights corresponding to the two reference brightness values closest to the input brightness value, and providing the interpolated values as the first weights. Driving method of a display device.
In Article 13, The step of calculating the above final compensation values is: A step further comprising calculating second weights based on the above input gradations and the above first weights, Driving method of a display device.
In Article 14, The above first weights each correspond to reference grayscales, and The step of calculating the above final compensation values is: If the input grayscale is identical to any one of the reference grayscales, the step of providing a first weight corresponding to the input grayscale as a second weight; and If the input grayscale is different from the reference grayscales, the method further includes the step of interpolating first weights corresponding to the two reference grayscales closest to the input grayscale and providing the interpolated value as the second weight. Driving method of a display device.
In Article 15, The step of calculating the above final compensation values is: A further step of calculating the final reward values by applying the second weights to the reference reward values. Driving method of a display device.
In Article 16, The step of calculating the above final compensation values is: A step further comprising determining whether to omit the step of calculating the final reward values based on the second weights. Driving method of a display device.
In Article 17, In the step of determining whether to omit the above, If at least one of the second weights is less than or equal to the first reference value, the step of calculating the final compensation values is omitted. Driving method of a display device.
In Article 17, The step of calculating the above final compensation values is: The method further includes the step of counting the number of second weights among the above second weights whose value is less than or equal to a first reference value and providing a count value. In the step of determining whether to omit the above, If the above count value is greater than the second reference value, the step of calculating the above final compensation values is omitted. Driving method of a display device.
In Article 17, The step of calculating the above final compensation values is: It further includes a step of calculating a representative grayscale of the above input grayscales, and In the step of determining whether to omit the above, If the second weight corresponding to the representative grayscale among the second weights is less than or equal to the first reference value, the step of calculating the final compensation values is omitted. Driving method of a display device.

Description

Display device, electronic device, and driving method thereof The present invention relates to a display device, an electronic device, and a method for driving the same. With the advancement of information technology, the importance of display devices, which serve as a medium connecting users and information, is being highlighted. In response to this, the use of display devices such as Liquid Crystal Displays (LCDs) and Organic Light Emitting Displays (OLEDs) is increasing. As display panels become larger, pixel dispersion depending on their position can become a problem. For example, the characteristics of the driving transistors or light-emitting elements included in each pixel may differ slightly, which can appear as stains during image display. FIG. 1 is a drawing for explaining a display device according to one embodiment of the present invention. FIG. 2 is a drawing for explaining a pixel according to one embodiment of the present invention. FIG. 3 is a drawing for explaining a compensation value correction unit according to one embodiment of the present invention. FIG. 4 is a drawing for explaining a first weight calculation unit according to one embodiment of the present invention. FIG. 5 is a drawing for explaining a second weight calculation unit according to one embodiment of the present invention. FIG. 6 is a drawing illustrating a turn-off trigger according to one embodiment of the present invention. FIG. 7 is a drawing for explaining a compensation value correction unit according to another embodiment of the present invention. FIG. 8 is a drawing for explaining a compensation value correction unit according to another embodiment of the present invention. FIG. 9 is a block diagram of an electronic device according to embodiments of the present invention. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are assigned to identical or similar components throughout the specification. Accordingly, the reference numerals described above may also be used in other drawings. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thickness may be exaggerated in the drawings to clearly represent various layers and regions. Furthermore, the expression "identical" in the explanation may mean "substantially identical." In other words, it may be an identicality to the extent that a person with ordinary knowledge would accept it as identical. Other expressions may also be those in which "substantially" has been omitted. FIG. 1 is a drawing for explaining a display device according to one embodiment of the present invention. Referring to FIG. 1, a display device (DD) according to one embodiment of the present invention may include a processor (9), a timing control unit (11), a data driving unit (12), a scanning driving unit (13), a display panel (14), a compensation value correction unit (15), and a memory (16). The processor (9) can provide input gradations and control signals for each image (or image frame). The processor (9) may correspond to a GPU (Graphics Processing Unit), CPU (Central Processing Unit), AP (Application Processor), etc. The control signals may include a vertical synchronization signal, a horizontal synchronization signal, a data enable signal, etc. The vertical synchronization signal may include multiple pulses and may indicate that the previous frame period ends and the current frame period begins based on the time when each pulse occurs. The interval between adjacent pulses of the vertical synchronization signal may correspond to one frame period. The horizontal synchronization signal may include multiple pulses and may indicate that the previous horizontal period ends and a new horizontal period begins based on the time when each pulse occurs. The interval between adjacent pulses of the horizontal synchronization signal may correspond to one horizontal period. The data enable signal may have an enable level for specific horizontal periods and a disable level for the remaining periods. When the data enable signal is at the enable level, it may indicate that input grayscales are supplied during the corresponding horizontal periods. The memory (16) may include reference compensation values. The compensation value correction unit (15) can calculate final compensation values by applying weights based on the input gradations to the reference compensation values. The timing control unit (11) can generate output gradations by applying the fina