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2. 发明公开

EP4387065A1 POWER SUPPLY CIRCUIT PROTECTION DEVICE AND POWER SUPPLY CIRCUIT PROTECTION METHOD 审中-公开
公开(公告)号：EP4387065A1
公开(公告)日：2024-06-19
申请号：EP23209822.8
申请日：2023-11-14
申请人： Alps Alpine Co., Ltd.
发明人： Endo, Futoshi
IPC分类号： H02M1/00 , H02M1/32 , H05B45/56 , H05B45/325
CPC分类号： H05B45/56 , H05B45/325 , H02M1/327 , H02M1/0022
摘要： A power supply circuit protection device has a PWM control circuit and a voltage sensor that detects an input voltage to be supplied to a step-up power supply circuit. When it is sensed that the input voltage detected by the voltage sensor satisfies a predetermined voltage condition, the PWM control circuit sets the duty cycle of a PWM signal to a value smaller than a duty cycle setting at a normal time. On the basis that the load of the step-up power supply circuit correlates to the input voltage, the input voltage to the step-up power supply circuit is detected by the voltage sensor. This enables the load of the step-up power supply circuit to be more accurately detected. Therefore, when the duty cycle of the PWM signal is set to a value smaller than at the normal time, the load of the step-up power supply circuit is reduced.

3. 发明公开

EP4350678A1 ELECTRONIC APPARATUS AND METHOD FOR CHANGING REFRESH RATE 审中-实审
公开(公告)号：EP4350678A1
公开(公告)日：2024-04-10
申请号：EP23720705.5
申请日：2023-05-02
申请人： Samsung Electronics Co., Ltd.
发明人： LEE, Juseok , LEE, Minwoo , YEOM, Donghyun , KIM, Kwangtai , KIM, Seungryeol , LEE, Seoyoung
IPC分类号： G09G3/32 , H05B45/325
摘要： An electronic device is provided. The electronic device may include a display panel including a plurality of pixels. The electronic device may include a display driver circuit. The display driver circuit may be configured to display a screen at a first refresh rate by providing an emission signal to the display panel according to a first cycle to drive each of the plurality of pixels. The display driver circuit may be configured to display, in response to identifying that the first refresh rate is changed to a second refresh rate which is less than the first refresh rate and is not a divisor of the first refresh rate, a screen at the second refresh rate by providing the emission signal to the display panel according to a second cycle to drive each of the plurality of pixels. The display driver circuit may be configured to display, in response to identifying that the first refresh rate is changed to third refresh rate which is less than the first refresh rate and a divisor of the first refresh rate, a screen at the third refresh rate by providing the emission signal to the display panel according to the first cycle to drive each of the plurality of pixels.

4. 发明公开

EP4307284A1 DISPLAY APPARATUS 审中-实审
公开(公告)号：EP4307284A1
公开(公告)日：2024-01-17
申请号：EP22846144.8
申请日：2022-07-14
申请人： Samsung Electronics Co., Ltd.
发明人： KIM, Jinho , PARK, Seungran , OH, Donggun , OH, Jongsu
IPC分类号： G09G3/32 , H05B45/325 , H05B45/33
摘要： Disclosed is a display apparatus. The display apparatus includes a display panel including a pixel array in which pixels respectively composed of a plurality of inorganic light emitting elements are arranged in a plurality of row lines, and sub-pixel circuits respectively corresponding to inorganic light emitting elements of the pixel array, and a driver configured to drive the sub-pixel circuits so that the inorganic light emitting elements of the pixel array emit light a plurality of times in an order of the plurality of row lines based on an image data voltage corresponding to one image frame, wherein the sub-pixel circuits respectively include a discharge transistor configured to remove a potential difference between both ends of a corresponding inorganic light emitting element by a predetermined cycle.

5. 发明授权

EP3440896B1 MULTIPLE LED STRING DIMMING CONTROL 有权
公开(公告)号：EP3440896B1
公开(公告)日：2023-12-27
申请号：EP17719099.8
申请日：2017-04-07
发明人： DANN, Jeffrey , DEARBORN, Scott
IPC分类号： H05B45/10 , H05B45/325 , H05B45/3725

6. 发明公开

EP4213595A1 METHOD AND SYSTEM FOR DYNAMICALLY ADJUSTING PWM SIGNAL, AND SYSTEM FOR DYNAMICALLY CONTROLLING HIGH-POWER LAMP 审中-实审
公开(公告)号：EP4213595A1
公开(公告)日：2023-07-19
申请号：EP21758300.4
申请日：2021-01-28
申请人： Guangzhou Haoyang Electronic Co., Ltd.
发明人： JIANG, Weikai
IPC分类号： H05B45/325
摘要： The present invention provides a method and a system for dynamically adjusting a PWM signal, and a system for dynamically controlling a high-power light. The method includes steps of: presetting a standard signal period and a standard duty ratio of an effective pulse; receiving a target duty ratio entered by a user and comparing the target duty ratio with the standard duty ratio; adjusting a duration of a signal period relative to the standard signal period while keeping a duration of the effective pulse unchanged to cause a duty ratio to reach the target duty ratio, and generating a corrected PWM signal according to the adjusted duration of the signal period and the target duty ratio, when the target duty ratio is smaller than the standard duty ratio; adjusting the duration of the effective pulse while keeping the duration of the standard signal period unchanged to cause the duty ratio to reach the target duty ratio, and generating a corrected PWM signal according to a duration of the standard signal period and the target duty ratio, when the target duty ratio is larger than the standard duty ratio; and generating a corrected PWM signal according to the standard duty ratio and the duration of the standard signal period when the target duty ratio is equal to the standard duty ratio. The method is capable of preventing flickering in the shooting of a camera or unsmooth dimming when adjusting the duty ratio.

7. 发明公开

EP4181111A2 DISPLAY DEVICE AND METHOD OF DRIVING THE SAME 审中-实审
公开(公告)号：EP4181111A2
公开(公告)日：2023-05-17
申请号：EP22205728.3
申请日：2022-11-07
申请人： Samsung Display Co., Ltd.
发明人： HWANG, Jung Hwan , KIM, Hyun Joon , LEE, Kye Uk , JEONG, Jun Ki
IPC分类号： G09G3/32 , H05B45/325
摘要： A display device includes PAM data lines receiving PAM and PWM data voltages, and sub-pixels connected to the PAM and PWM data lines. A sub-pixel includes a light emitting element, a first pixel driver to supply a control current according to one of the PAM data voltages to a node, a second pixel driver to generate a driving current according to one of the PWM data voltages, and a third pixel driver to adjust a period during which the driving current is supplied to the light emitting element according to a voltage of the node. A peak current value of the driving current when the sub-pixel emits a light corresponding to a low gray level region is smaller than a peak current value of the driving current when the sub-pixel emits a light corresponding to a high gray level region higher than the low gray level region.

8. 发明公开

EP4173443A1 LED HEADLIGHT ASSEMBLY AND CONTROL 审中-实审
公开(公告)号：EP4173443A1
公开(公告)日：2023-05-03
申请号：EP21745869.4
申请日：2021-06-23
申请人： Tesla, Inc.
发明人： HARVEY, Ross
IPC分类号： H05B45/325 , H05B45/33 , H05B45/46 , H05B45/48

9. 发明公开

EP4156861A1 ILLUMINATION CONTROL DEVICE AND ILLUMINATION SYSTEM 有权转让
公开(公告)号：EP4156861A1
公开(公告)日：2023-03-29
申请号：EP22197120.3
申请日：2022-09-22
申请人： Yazaki Corporation
发明人： Yamamoto, Shohei
IPC分类号： H05B45/20 , H05B47/105 , H05B47/175 , H05B45/325
摘要： In an illumination control device, a first effect control unit acquires brightness information corresponding to waveform height for each piece of unit time information when effect information for changing brightness is acquired, acquire reference duty ratios corresponding to the acquired brightness information from color tables corresponding to color information added to the effect information, and output pulse signals of the output duty ratios corresponding to the acquired reference duty ratios. Also, a second effect control unit acquires the color information corresponding to the waveform height for each piece of unit time information when the effect information for changing color is acquired, acquire reference duty ratios corresponding to the brightness information added to the effect information from the color tables corresponding to the acquired color information, and output pulse signals of the output duty ratios corresponding to the acquired reference duty ratios.

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