公开(公告)号：US11908370B2

公开(公告)日：2024-02-20

申请号：US18109106

申请日：2023-02-13

Applicant: Samsung Display Co., Ltd.

Inventor： Geonhwi Park ,  Hyunjoo Seo ,  Kihyun Pyun

IPC: G09G3/20

CPC classification number: G09G3/2007 ,  G09G3/2096 ,  G09G2320/0233 ,  G09G2320/0276 ,  G09G2320/0626 ,  G09G2320/0666 ,  G09G2360/16

Abstract: A method of operating a display apparatus includes the following steps: calculating a first color reference luminance ratio, a second color reference luminance ratio, and a third color reference luminance ratio for a reference grayscale value; calculating first color target luminance ratios, second color target luminance ratios, and third color target luminance ratios for adjustment target grayscale values; generating first adjustment values, second adjustment values, and third adjustment values based on the first, second, and third color reference luminance ratios and the first, second, and third color target luminance ratios; performing gamma conversions of first, second and third colors using the first, second, and third adjustment values for the adjustment target grayscale values; using results of the gamma conversions to generate data voltages; and using the data voltage and a display panel of the display apparatus to emit or transmit light for displaying an image.

公开(公告)号：US11682354B1

公开(公告)日：2023-06-20

申请号：US17981225

申请日：2022-11-04

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Hyunjoo Seo

IPC: G09G3/3258

CPC classification number: G09G3/3258 ,  G09G2300/0857

Abstract: A display device is disclosed that includes a display panel, a first source circuit board, a second source circuit board, and a control circuit board. The first source circuit board is configured to output a first feedback voltage corresponding to a first driving voltage. The second source circuit board is configured to output a second feedback voltage corresponding to the second driving voltage. The control circuit board is configured to supply the first and second driving voltages to the first and second source circuit boards, respectively, and receive the first and second feedback voltages from the first and second source circuit boards, respectively. The control circuit board includes a comparison unit configured to compare the first and second feedback voltages with a preset reference voltage and generate a result signal in response to a comparison result, and a generation unit configured to generate a protection signal for activating a protection mode for protecting the display panel based on the result signal.

公开(公告)号：US12014680B2

公开(公告)日：2024-06-18

申请号：US18111234

申请日：2023-02-17

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Hyunjoo Seo

IPC: G09G3/3225

CPC classification number: G09G3/3225 ,  G09G2300/0828 ,  G09G2320/0626 ,  G09G2330/028

Abstract: A display device includes a display panel which is driven in a mode selected from among a plurality of modes including different luminance values, a voltage generator which generates a driving voltage, a resistor connected to an output terminal, from which the driving voltage is output, a current sensing unit connected in parallel to the resistor, where the current sensing unit measures a voltage value across both ends of the resistor and calculates a driving current value using a resistance value of the resistor and a measured voltage value, and a maximum current calculating unit which calculates a maximum measured current value corresponding a the luminance value of a selected mode and outputs a selection signal corresponding to the maximum measured current value, and the current sensing unit sets a maximum measured voltage value corresponding to the maximum measured current value in response to the selection signal.