EP-4742227-A1 - DISPLAY DEVICE AND DRIVING METHOD THEREFOR

EP4742227A1EP 4742227 A1EP4742227 A1EP 4742227A1EP-4742227-A1

Abstract

A modular display device according to embodiments of the present disclosure may comprise: a display unit including at least one display module; a storage for storing at least one instruction; and at least one processor for executing the at least one instruction. The at least one processor can calculate the load of a full screen on the basis of input image data, calculate a peak gain for output image luminance on the basis of the load, calculate the heating level of the at least one display module on the basis of the peak gain, and control the peak gain on the basis of the heating level of the at least one display module.

Inventors

KU, Jungmin
JANG, Sunghwan

Assignees

Samsung Electronics Co., Ltd.

Dates

Publication Date: 20260513
Application Date: 20240701

Claims (15)

A modular display device (100), comprising: a display unit (110) including at least one display module; a storage (120) storing at least one instruction; and at least one processor (130) executing the at least one instruction, wherein the at least one processor: calculates a load of a full screen based on input image data; calculates a peak gain for output image luminance based on the load; calculates a heat generation level of the at least one display module based on the peak gain; and controls the peak gain based on the heat generation level of the at least one display module.
The display device of claim 1, wherein the at least one processor: predicts whether the at least one display module exceeds a reference operating temperature by calculating the heat generation level in units of the at least one display module; and executes a gain limit algorithm in case that it is predicted that the at least one display module will exceed the reference operating temperature, based on the heat generation level.
The display device of claim 1, wherein the at least one processor: extracts an average picture level (APL) for the full screen from the input image data; and calculates the load of the full screen based on the average picture level.
The display device of any one of claims 1 to 3, wherein the at least one processor: calculates a normal gain that minimizes the output image luminance based on the load; and calculates a max gain that maximizes the output image luminance based on the load.
The display device of any one of claims 1 to 4, wherein the at least one processor: extracts a high luminance area of the at least one display module based on the peak gain; and calculates the heat generation level based on a size of the high luminance area.
The display device of claim 5, wherein the high luminance area has a luminance in a range of 1000 nit to 2000 nit.
The display device of claim 5, wherein the at least one processor executes a gain limit algorithm for controlling the peak gain in case that a size of the high luminance area exceeds 20% to 25% of a size of the at least one display module.
The display device of claim 7, wherein the at least one processor controls at least one of a max gain holding time, a gain control slope, or a gain limit, based on the heat generation level of the at least one display module.
The display device of claim 8, wherein the gain limit algorithm decreases the max gain holding time as a number of the at least one display module including the high luminance area increases.
The display device of claim 8, wherein the gain limit algorithm increases the gain control slope as a number of the at least one display module including the high luminance area increases.
The display device of claim 8, wherein the gain limit algorithm decreases the gain limit as a number of the at least one display module including the high luminance area increases.
The display device of claim 1, wherein the at least one processor: extracts at least one high luminance area included in at least one of four adjacent display modules; calculates a dispersion degree of the at least one high luminance area; and calculates the heat generation level of the at least one of the four adjacent display modules based on the dispersion degree.
The display device of claim 12, wherein the at least one processor executes a gain limit algorithm for controlling the peak gain in case that a summed size of the at least one high luminance area included in the at least one of the four adjacent display modules exceeds 20% to 25% of a size of the at least one display module.
A method for driving a modular display device, comprising: calculating a load of a full screen based on input image data; calculating a peak gain for output image luminance based on the load; calculating a heat generation level of at least one display module based on the peak gain; and controlling the peak gain based on the heat generation level of the at least one display module.
The method of claim 14, wherein calculating the load of the full screen comprises: extracting an average picture level (APL) for the full screen from the input image data; and calculating the load of the full screen based on the average picture level.

Description

[Technical Field] Various embodiments of the disclosure relate to a modular display device and a method for driving the modular display device. (Background Art] With the development of digital technology, various types of electronic devices are being used, such as smart TV, smart phone, tablet PC, electronic organizer, PDA (personal digital assistant), or wearable device. In particular, various types of electronic devices may be implemented as a display device that outputs an image to a display panel based on input data. Recently, a modular display device combining a plurality of sub-display devices has been developed. The modular display device may be composed of a plurality of sub-display devices (e.g., a plurality of display modules), and each sub-display device may display a divided image which is a division of one overall image. Accordingly, the modular display device may display the overall image through a large-scale screen configured by the plurality of sub-display devices. Upon displaying an image based on input data, a display device may adjust a gain for controlling a brightness of the image to prevent a decrease in display performance due to unnecessary power consumption and heat generation. For example, the display device may lower the brightness of the image by decreasing the gain in case where the load of the image is relatively high, and may increase the brightness of the image by increasing the gain in case where the load of the image is relatively low. Meanwhile, in the modular display device, the divided image displayed by each sub-display device may vary depending on the arrangement and number of the sub-display devices. Accordingly, in case where the modular display device performs a collective gain adjustment on the basis of the overall image, a decrease in display quality may be caused due to unnecessary gain adjustment. Therefore, a technology is required for the modular display device to perform the gain adjustment based on the arrangement and number of the sub-display devices. [Disclosure of Invention] [Solution to Problems] Various embodiments of the disclosure may provide a display device and a method for driving the display device for efficiently controlling heat generation of a display unit, by determining a heat generation level based on each display module, rather than collectively determining the heat generation level based on a full screen, and by adjusting the peak gain in consideration of the arrangement and number of the display modules. A modular display device according to embodiments of the disclosure may include a display unit including at least one display module, a storage storing at least one instruction, and at least one processor executing the at least one instruction. The at least one processor may calculate a load of a full screen based on input image data, calculate a peak gain for output image luminance based on the load, calculate a heat generation level of the at least one display module based on the peak gain, and control the peak gain based on the heat generation level of the at least one display module. In an embodiment, the at least one processor may predict whether the at least one display module exceeds a reference operating temperature by calculating the heat generation level in units of the at least one display module. The at least one processor may execute a gain limit algorithm in case that it is predicted that the at least one display module will exceed the reference operating temperature, based on the heat generation level. In an embodiment, the at least one processor may extract an average picture level (APL) for the full screen from the input image data, and calculate the load of the full screen based on the average picture level. In an embodiment, the at least one processor may calculate a normal gain that minimizes the output image luminance based on the load, and calculate a max gain that maximizes the output image luminance based on the load. In an embodiment, the at least one processor may extract a high luminance area of the at least one display module based on the peak gain, and calculate the heat generation level based on a size of the high luminance area. In an embodiment, the high luminance area may have a luminance in the range of 1000 nit to 2000 nit. In an embodiment, the at least one processor may execute a gain limit algorithm for controlling the peak gain in case that the size of the high luminance area exceeds 20% to 25% of the size of the at least one display module. In an embodiment, the at least one processor may control at least one of a max gain holding time, a gain control slope, or a gain limit, based on the heat generation level of the at least one display module. In an embodiment, the gain limit algorithm may decrease the max gain holding time as the number of the at least one display module including the high luminance area increases. In an embodiment, the gain limit algorithm may increase the gain control slope as