公开(公告)号：US11847951B2

公开(公告)日：2023-12-19

申请号：US17979028

申请日：2022-11-02

Applicant: Samsung Display Co., Ltd.

Inventor： Sanghyun Lee ,  Dae-Sik Lee ,  Keunoh Kang ,  Siduk Sung ,  Songyi Han

IPC: G09G3/20

CPC classification number: G09G3/2011 ,  G09G2310/027 ,  G09G2320/0276 ,  G09G2320/0673

Abstract: A gamma voltage generator within a display device includes a plurality of gamma generation circuits that respectively generate a plurality of gamma voltages. At least one gamma generation circuit includes an input circuit configured to receive a first reference voltage and a second reference voltage, a reference voltage select circuit configured to select a reference voltage among the first reference voltage and the second reference voltage by comparing a gamma voltage generated by the at least one gamma generation circuit with the first reference voltage and the second reference voltage, a digital-to-analog conversion circuit configured to generate an analog voltage corresponding to a gamma code based on the reference voltage selected by the reference voltage select circuit, and an output circuit configured to output the gamma voltage based on the analog voltage.

公开(公告)号：US11592859B2

公开(公告)日：2023-02-28

申请号：US17206784

申请日：2021-03-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Siduk Sung ,  Dae-Sik Lee ,  Sanghyun Lee

IPC: G06F1/08 ,  G09G3/20 ,  G06F1/10

Abstract: A gate clock generator of a display device includes a carry clock generator configured to sequentially generate N carry clock signals based on a carry-on clock signal and a carry-off clock signal, a scan clock generator configured to generate N scan clock signals based on a scan-on clock signal and a scan-off clock signal, and a sensing clock generator configured to generate N sensing clock signals based on a sensing-on clock signal and a sensing-off clock signal. In a multi-clock mode of the display device, during an on period of a K-th carry clock signal, the scan clock generator outputs a K-th scan clock signal such that the K-th scan clock signal has a number of pulses that corresponds to a number of pulses of the scan-on clock signal in the on period of the K-th carry clock signal, and the sensing clock generator outputs a K-th sensing clock signal such that the K-th sensing clock signal has a number of pulses that corresponds to a number of pulses of the sensing-on clock signal in the on period of the K-th carry clock signal.

公开(公告)号：US10935823B2

公开(公告)日：2021-03-02

申请号：US16260936

申请日：2019-01-29

Applicant: Samsung Display Co., Ltd.

Inventor： Dae-Sik Lee ,  Yanguk Nam ,  Sanghyun Lee

IPC: G02F1/13 ,  G09G3/3266 ,  G09G3/00 ,  G02F1/1345 ,  G09G3/36

Abstract: A short-circuit detection circuit includes a voltage comparison block that receives a scan start signal from a scan start signal transmission line, receives a reference voltage from a reference voltage source, and outputs a comparison result by comparing the scan start signal with the reference voltage at a falling edge of a vertical start signal, and a short-circuit determination block that determines whether the scan start signal transmission line is short-circuited based on the comparison result and operates an over-current protection circuit by providing a short-circuit detection signal to the over-current protection circuit when the scan start signal transmission line is short-circuited.

公开(公告)号：US10437546B2

公开(公告)日：2019-10-08

申请号：US15846698

申请日：2017-12-19

Applicant: Samsung Display Co., Ltd.

Inventor： Tae-Jong Jun ,  Sanghyun Lee ,  Jinseob Byun

IPC: G06F3/14 ,  G09G3/20 ,  G09G3/36

Abstract: A display apparatus includes a driver which receives an input image data (RGB), generates a compensation image data (RGBD) by compensating the input image data according to an equation 1, and generates a final image data by comparing the compensation image data to a maximum grayscale ⁢ RGB D = RGB * D , wherein ⁢ ⁢ ⁢ D = ( 100 decreasing ⁢ ⁢ ratio ⁢ ⁢ of ⁢ ⁢ luminance ) 1 α , ⁢ ⁢ wherein ⁢ ⁢ α ⁢ ⁢ is ⁢ ⁢ a ⁢ ⁢ gamma ⁢ ⁢ value , and ⁢ ⁢ decreasing ⁢ ⁢ ratio ⁢ ⁢ of ⁢ ⁢ luminance = real ⁢ ⁢ luminance target ⁢ ⁢ luminance * 100 ; 〈 equation ⁢ ⁢ 1 〉 and a display panel which includes a plurality of unit pixels and displays an image based on the final image data.

公开(公告)号：US09386651B2

公开(公告)日：2016-07-05

申请号：US14263124

申请日：2014-04-28

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sanghyun Lee ,  Seonhye Kim ,  Jeong Bong Lee ,  MiKyung Kang ,  Kyung-Uk Choi

IPC: H05B33/08 ,  G09G3/34 ,  G09G3/36

CPC classification number: H05B33/0851 ,  G09G3/342 ,  G09G3/3648 ,  G09G2320/064 ,  G09G2320/0646 ,  H05B33/0815 ,  H05B33/0827 ,  Y02B20/346

Abstract: A backlight unit includes a dimming signal generator configured to generate first and second pulse width modulation signals, first and second driving blocks configured to receive a driving voltage to emit a light, a controller configured to receive the first and second pulse width modulation signals and an output signal from one of the first and second driving blocks to generate a voltage control signal, and a voltage converter configured to control a level of an input voltage in response to the voltage control signal to generate the driving voltage.

Abstract translation: 背光单元包括被配置为产生第一和第二脉冲宽度调制信号的调光信号发生器，被配置为接收驱动电压以发光的第一和第二驱动块，被配置为接收第一和第二脉冲宽度调制信号的控制器和 输出信号以产生电压控制信号;以及电压转换器，被配置为响应于所述电压控制信号来控制输入电压的电平以产生所述驱动电压。