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Extract from the Register of European Patents

EP About this file: EP3657491

EP3657491 - DC VOLTAGE CONVERSION CIRCUIT, DC VOLTAGE CONVERSION METHOD AND LIQUID CRYSTAL DISPLAY DEVICE [Right-click to bookmark this link]
StatusThe application is deemed to be withdrawn
Status updated on  27.10.2023
Database last updated on 19.07.2024
FormerGrant of patent is intended
Status updated on  18.09.2022
FormerRequest for examination was made
Status updated on  24.04.2020
FormerThe international publication has been made
Status updated on  26.01.2019
Most recent event   Tooltip27.10.2023Application deemed to be withdrawnpublished on 29.11.2023  [2023/48]
Applicant(s)For all designated states
Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
No. 9-2 Tangming Road
Gongming Street
Guangming New District
Shenzhen, Guangdong 518132 / CN
[2020/22]
Inventor(s)01 / LI, Wenfang
No. 9-2 Tangming Road
Gongming Street
Guangming New District
Shenzhen Guangdong 518132 / CN
02 / CAO, Dan
No. 9-2 Tangming Road
Gongming Street
Guangming New District
Shenzhen Guangdong 518132 / CN
 [2020/22]
Representative(s)Zinkler, Franz, et al
Schoppe, Zimmermann, Stöckeler
Zinkler, Schenk & Partner mbB
Patentanwälte
Radlkoferstrasse 2
81373 München / DE
[2020/22]
Application number, filing date17918457.704.12.2017
[2020/22]
WO2017CN114389
Priority number, dateCN20171059261919.07.2017         Original published format: CN201710592619
[2020/22]
Filing languageZH
Procedural languageEN
PublicationType: A1 Application with search report
No.:WO2019015215
Date:24.01.2019
Language:ZH
[2019/04]
Type: A1 Application with search report 
No.:EP3657491
Date:27.05.2020
Language:EN
[2020/22]
Search report(s)International search report - published on:CN24.01.2019
(Supplementary) European search report - dispatched on:EP19.03.2021
ClassificationIPC:G09G3/36, H02M3/156, // H02M3/158, H02M1/00, H02M3/07
[2021/16]
CPC:
H02M3/156 (EP); G09G3/3696 (EP,CN,KR,US); H02M3/07 (EP,CN,KR,US);
G09G2320/0204 (US); G09G2330/028 (EP); H02M1/0032 (EP);
H02M1/008 (EP); H02M3/158 (EP,US); Y02B70/10 (EP) (-)
Former IPC [2020/22]G09G3/36
Designated contracting statesAL,   AT,   BE,   BG,   CH,   CY,   CZ,   DE,   DK,   EE,   ES,   FI,   FR,   GB,   GR,   HR,   HU,   IE,   IS,   IT,   LI,   LT,   LU,   LV,   MC,   MK,   MT,   NL,   NO,   PL,   PT,   RO,   RS,   SE,   SI,   SK,   SM,   TR [2020/22]
TitleGerman:GLEICHSPANNUNGSWANDLERSCHALTUNG, GLEICHSPANNUNGSWANDLUNGSVERFAHREN UND FLÜSSIGKRISTALLANZEIGEVORRICHTUNG[2020/22]
English:DC VOLTAGE CONVERSION CIRCUIT, DC VOLTAGE CONVERSION METHOD AND LIQUID CRYSTAL DISPLAY DEVICE[2020/22]
French:CIRCUIT DE CONVERSION DE TENSION CONTINUE, PROCÉDÉ DE CONVERSION DE TENSION CONTINUE ET DISPOSITIF D'AFFICHAGE À CRISTAUX LIQUIDES[2020/22]
Entry into regional phase17.02.2020Translation filed 
17.02.2020National basic fee paid 
17.02.2020Search fee paid 
17.02.2020Designation fee(s) paid 
17.02.2020Examination fee paid 
Examination procedure17.02.2020Examination requested  [2020/22]
01.10.2021Amendment by applicant (claims and/or description)
19.09.2022Communication of intention to grant the patent
14.12.2022Fee for grant paid
14.12.2022Fee for publishing/printing paid
14.12.2022Receipt of the translation of the claim(s)
01.07.2023Application deemed to be withdrawn, date of legal effect  [2023/48]
21.07.2023Despatch of communication that the application is deemed to be withdrawn, reason: renewal fee not paid in time  [2023/48]
Fees paidRenewal fee
17.02.2020Renewal fee patent year 03
24.12.2020Renewal fee patent year 04
24.12.2021Renewal fee patent year 05
Penalty fee
Additional fee for renewal fee
31.12.202206   M06   Not yet paid
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Patent Court		 See the Register of the Unified Patent Court for opt-out data
Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Documents cited:Search[A]US2008150856  (NAM HYUN-WOO [KR]) [A] 1-8* figures 1, 5-8 *;
 [I]  - Maxim Integrated Products, "TFT-LCD Power-Supply Controllers", (20031001), pages 1 - 28, URL: https://www.yic-electronics.nl/datasheet/29/1060043078.pdf, (20210310), XP055784315 [I] 1-8 * figures 1-5 *
 [I]  - Texas Instruments Incorporated, "TI Designs Bipolar TFT LCD Supply Using TPS65131-Q1 and Charge Pumps", Dallas, Texas, (20150501), pages 1 - 11, URL: https://www.ti.com/lit/ug/tidu978/tidu978.pdf?ts=1615372600168&ref_url=https%253A%252F%252Fwww.google.com%252F, (20210310), XP055784351 [I] 1-8 * Chapters 2 and 2.6;; figure 1 *
 [I]  - Texas Instruments Incorporated, "TPS65131-Q1 Positive-and Negative-Output DC-DC Converter", (20170301), pages 1 - 35, URL: https://www.ti.com/lit/ds/symlink/tps65131-q1.pdf?ts=1615369176303&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS65131-Q1, (20210310), XP055784354 [I] 1-8 * Chapter 8.2 *
The EPO accepts no responsibility for the accuracy of data originating from other authorities; in particular, it does not guarantee that it is complete, up to date or fit for specific purposes.