(12) United States Patent (10) Patent No.: US 9,626,896 B2 Lee Et Al
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USOO9626896B2 (12) United States Patent (10) Patent No.: US 9,626,896 B2 Lee et al. (45) Date of Patent: Apr. 18, 2017 (54) DISPLAY DEVICE AND MOBILE (58) Field of Classification Search ELECTRONIC APPARATUS INCLUDING None THE SAME See application file for complete search history. (71) Applicant: SAMSUNGELECTRONICS CO., (56) References Cited LTD., Suwon-si, Gyeonggi-do (KR) U.S. PATENT DOCUMENTS (72) Inventors: Seung-Gun Lee, Hwaseong-si (KR): 4.415,985 A * 11/1983 McDaniel ............ GOSB 19,409 Hyo-Jin Kim, Hwaseong-si (KR); 6.229,765 B1 5, 2001 Rabi 345,501 Hak-Seong Lee, Hwaseong-si (KR) 6,393.2634. 4-1 B1 5/2002 Hayashi 6,747,916 B1 6/2004 Fleury et al. (73) Assignee: SAMSUNGELECTRONICS CO., 6,876,600 B2 4/2005 Ito et al. LTD., Suwon-si, Gyeonggi-Do (KR) 7,181,006 B2 2/2007 Shimazaki 8,547,800 B2 10/2013 Kiyomizu (*) Notice: Subject to any disclaimer, the term of this 2003/0051211 A1* 3/2003 Fujisaki ............... Google9. patent is extended or adjusted under 35 U.S.C. 154(b) by 19 days. (Continued) (21) Appl. No.: 14/615,097 FOREIGN PATENT DOCUMENTS KR 102005OOO1526 1, 2005 (22) Filed: Feb. 5, 2015 KR 102O110051897 5, 2011 (65) Prior Publication Data Primary Examiner — Andrew Sasinowski Assistant Examiner — Henok Heyi US 2015/0325213 A1 Nov. 12, 2015 (74) Attorney, Agent, or Firm — F. Chau & Associates, (30) Foreign Application Priority Data LLC (57) ABSTRACT May 7, 2014 (KR) ........................ 10-2014-OO53899 A mobile device includes a display driver integrated circuit (51) Int. Cl. (DDI), a display panel, and an application processor. The G09G 5/00 (2006.01) DDI provides an internal synchronization signal based on an G09G 3/20 (2006.01) internal clock signal as a synchronization signal. The appli G09G 5/8 (2006.01) cation processor calculates a time offset corresponding to a G09G 3/3208 (2016.01) difference between a real time and the internal synchroni (52) U.S. Cl. zation signal, and provides the time offset to the DDI. The CPC ......... G09G3/2096 (2013.01); G09G 3/3208 DDI calculates a time to be displayed based on the time (2013.01); G09G 5/008 (2013.01); G09G 5/18 offset and a current time provided from the application (2013.01); G09G 2300/0426 (2013.01); G09G processor, and displays the time to be displayed in the 2310/0243 (2013.01); G09G 2370/10 display panel in a self clock display mode. (2013.01) 21 Claims, 14 Drawing Sheets RUN SPAY DEWC S210 SEF COCK MODE START S220 SEF COCKDISPLAY MODE S230 UPDATE CURRENT RE & STORE OFFSE WALU UPDATE NEW CURRENTE & STORE NE OFFSE WALE S260 COMPARE OFFSWALE OK EXEND TEPDATE PERIOD SLEEP OUT US 9,626,896 B2 Page 2 (56) References Cited U.S. PATENT DOCUMENTS 2005/011 1304 A1* 5, 2005 Pikula ...................... GO4G 3/00 368,47 2011/0254829 A1 10/2011 Agevik et al. 2011/0285833 A1* 11/2011 Tsurumoto ............. G09G 3/003 34.8/56 2012fO155584 A1* 6, 2012 Wilkinson ............... GO4G 7700 375,354 2012/02873.25 A1* 11/2012 Oikawa .................. HO4N 5,772 348,333.02 2013,0082615 A1 * 4, 2013 Williams ........... HOSB 33,0827 315, 186 2013/0142300 A1* 6, 2013 Takemura ............... GO4F 1,005 377/20 2013/0314360 A1* 11/2013 Saitoh ................... G06F 3,0412 345,173 2015,0033060 A1 1/2015 Kim .......................... G06F 1/12 T13/400 * cited by examiner U.S. Patent Apr. 18, 2017 Sheet 1 of 14 US 9,626,896 B2 F. G. 1 OO 200 500 ECLKDP F. G. 2 100 20 110 130 1 AO MOBILE SENSING CONNECTV TY MODULE CAMERA & 10 OFFSET re H-131 MODULE it CALCULATORwas assure was wwres 133 MCC OFV 105 ECLK CT RTG 173 150 160 170 18O U.S. Patent Apr. 18, 2017 Sheet 2 of 14 US 9,626,896 B2 HHA|HCl 9'0|- U.S. Patent Apr. 18, 2017 Sheet 3 of 14 US 9,626,896 B2 F. G. 4 220 MCC 221 RGB TO 230 DT MCC 223 ECLK TO 230 CLK MCC 225 HS, VS TO 230 HS, IWS F.G. 5 11 113 115 SYNC (IVS) COUNTER COMPARATOR OFV REFT U.S. Patent Apr. 18, 2017 Sheet 4 of 14 US 9,626,896 B2 F.G. 6 R E F O F V O VS FIG 7 260 261 263 ME CLK COUNTER ADJUSTER DCT CT OFV U.S. Patent Apr. 18, 2017 Sheet S of 14 US 9,626,896 B2 FG. 8 281 280 FG. 9 RUN D!SPLAY DEVICE S110 TRANSMT SYNC SIGNAL S120 CALCULATE TIME OFFSET S130 TRANSMT TIME OFFSET AND CURRNET T ME & SLEEP N S40 ENTER INTO SELF CLOCK DISPLAY MODE S150 SLEEP OUT S160 END U.S. Patent Apr. 18, 2017 Sheet 6 of 14 US 9,626,896 B2 FIG 10 100 200 S110 OPERATING OPERATING SYNC OPERATING S130 CALCULATE TME OFFSET OPERATING S140 OERATING S150 STOP DISPLAY SELF CLOCK S160 OPERATING OPERATING U.S. Patent Apr. 18, 2017 Sheet 7 of 14 US 9,626,896 B2 FG 11 100b 300 500 120 11 Ob 130 140 SENSING CONNECTV TY MOBILE MODULE CAMERA & 1/O CPU SENSOR1-131 MODULE SENSOR2-133 MCC 105 ECLKCT RTG MEMORY NTERFACE POWER SUPPLY 173b 150 160 ITR 170b 180 U.S. Patent Apr. 18, 2017 Sheet 9 of 14 US 9,626,896 B2 F.G. 14 350 351 352 353 OFFSET WS COUNTER REGISTER CALCULATOR CTi CT(i+1) CT CT(i+1) OFV COMPARATOR 354 INTERRUPT TR SIGNAL GENERATOR 357 CLK INTERNAL TIMER DCT CT OFV U.S. Patent Apr. 18, 2017 Sheet 10 of 14 US 9,626,896 B2 sus-a- &-- - o U.S. Patent Apr. 18, 2017 Sheet 11 of 14 US 9,626,896 B2 FG 16 CSTART RUN DISPLAY DEVCE S210 SELF CLOCK MODE START S220 SELF CLOCK DISPLAY MODE S230 UPDATE CURRENT TIME & STORE OFFSET VALUE S240 UPDATE NEW CURRENT TIME & STORE N-S250 NEW OFFSET VALUE COMPARE OFFSET VALUE EXTEND TIME UPDATE PERIOD S270 SLEEP OUT S280 U.S. Patent Apr. 18, 2017 Sheet 12 of 14 US 9,626,896 B2 FG 17 100b 300 AP S210, S220: OPERATING OPERATING S230. STOP OPERATING UPDATE CT STORE S240: OFFSET S250: STORE NEW OFFSET U.S. Patent Apr. 18, 2017 Sheet 13 of 14 US 9,626,896 B2 F.G. 18 U.S. Patent Apr. 18, 2017 Sheet 14 of 14 US 9,626,896 B2 F.G. 19 600 3D IMAGE SENSOR 700 2D IMAGE SENSOR 800 620 N- CONNECTV TY USER INTERFACE 640 MEMORY 630 DEVICE POWER 650 SUPPLY US 9,626,896 B2 1. 2 DISPLAY DEVICE AND MOBILE The time adjuster may receive the current time and the time ELECTRONIC APPARATUS INCLUDING offset, may adjust the current time based on the counting THE SAME value and the time offset, and may provide the digital time information. CROSS-REFERENCE TO RELATED In an exemplary embodiment, the DDI may further APPLICATION include a symbol memory and a control logic circuit. The symbol memory may store a plurality of timing symbols that This application claims priority under 35 U.S.C. S 119 to are used for displaying the time to be displayed. The control Korean Patent Application No. 10-2014-0053899, filed on logic circuit may control the symbol memory Such that, May 7, 2014, in the Korean Intellectual Property Office, the 10 among the plurality of timing symbols, timing symbols disclosure of which is incorporated by reference herein in its associated with the time to be displayed may be output. entirety. In an exemplary embodiment, the DDI may further include a selection circuit. The selection circuit may select TECHNICAL FIELD one of an image signal and the time to be displayed, and may 15 provide the selected one of the image signal and the time to Exemplary embodiments of the present inventive concept be displayed to a timing controller in response to a mode relate to a display device, and more particularly to, a mobile change signal. The mode change signal may be one of the electronic apparatus including the display device. self clock display mode and a video mode. The image signal provided from the application processor may be displayed in DISCUSSION OF THE RELATED ART the video mode. In an exemplary embodiment, the application processor Some Smart phones have a display device capable of may include an offset calculator and a real time generator. displaying high-definition television (HDTV) signals. The The offset calculator may calculate the real time and the time Smartphone may include a display driver integrated circuit offset based on the synchronization signal. The real time (IC) for managing the HDTV signals to the display device. 25 generator may generate the real time. For example, the display device may be an organic light In an exemplary embodiment, the application processor emitting display (OLED). may be connected to the DDI through a high speed serial In addition, the Smartphones can be configured to connect interface (HSSI). The application processor may enter into a to wearable devices. sleep mode in the self clock display mode. The display 30 device may include a watch-typed wearable device. SUMMARY According to an exemplary embodiment of the present inventive concept, a mobile device includes an application According to an exemplary embodiment of the present processor, a display panel, and a display driver integrated inventive concept, a mobile device includes a display driver circuit (DDI). The application processor provides a current integrated circuit (DDI), a display panel, and an application 35 time indicating a real time in response to an interrupt signal processor.