GB2449949B - Driving apparatus for reporting states of light-emitting diode channels in a binary mode - Google Patents

Driving apparatus for reporting states of light-emitting diode channels in a binary mode

Info

Publication number
GB2449949B
GB2449949B GB0714805A GB0714805A GB2449949B GB 2449949 B GB2449949 B GB 2449949B GB 0714805 A GB0714805 A GB 0714805A GB 0714805 A GB0714805 A GB 0714805A GB 2449949 B GB2449949 B GB 2449949B
Authority
GB
United Kingdom
Prior art keywords
channels
led
channel
binary mode
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB0714805A
Other versions
GB0714805D0 (en
GB2449949A (en
Inventor
Chi-Chang Hung
Yung-Sheng Wei
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Macroblock Inc
Original Assignee
Macroblock Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Macroblock Inc filed Critical Macroblock Inc
Publication of GB0714805D0 publication Critical patent/GB0714805D0/en
Publication of GB2449949A publication Critical patent/GB2449949A/en
Application granted granted Critical
Publication of GB2449949B publication Critical patent/GB2449949B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/26—Testing of individual semiconductor devices
    • G01R31/2607—Circuits therefor
    • G01R31/2632—Circuits therefor for testing diodes
    • G01R31/2635—Testing light-emitting diodes, laser diodes or photodiodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/1608—Error detection by comparing the output signals of redundant hardware
    • G06F11/1616—Error detection by comparing the output signals of redundant hardware where the redundant component is an I/O device or an adapter therefor
    • G06F11/162—Displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of LEDs
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/041—Temperature compensation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/10—Dealing with defective pixels

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Quality & Reliability (AREA)
  • General Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Control Of El Displays (AREA)
  • Led Devices (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

A driving apparatus for reporting states of a light-emitting diode (LED) channels in a binary mode comprises a plurality of channel points (NCHm), at least one controller 112, a plurality of detectors 114, and a signal converter (fig 2, 130). The controller controls operation of the connected LED channels and the signal converter receives a detecting signal Sm generated by each detector 114 and corresponding to the state of the LED channel, and computes the received detecting signal to generate a report signal with N bits in a binary mode, wherein N is an integer greater than 1, and the number of the channel points is less than 2<N>. The number of channels is preferably greater than or equal to 2<N-1>. The detector 114 may comprise voltage comparators 115,116 comparing the channel voltage with voltage references Vrefo and Vrefs corresponding to error states such as an open circuit and a short circuit, and logic element such as gate 117 to aggregate the state into detecting signal Sm. Error states may also comprise over temperature or electric leakage and the controller 112 may comprise a switch SW1/SW2 and regulating unit 113 to control turn-on of the switch. The apparatus may drive the light emitting diodes of a LED area display, such as one used for image display.
GB0714805A 2007-06-08 2007-07-30 Driving apparatus for reporting states of light-emitting diode channels in a binary mode Expired - Fee Related GB2449949B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW096120888A TWI318389B (en) 2007-06-08 2007-06-08 Light emitting diode (led) driver for reporting channel-operating state in binary mode

Publications (3)

Publication Number Publication Date
GB0714805D0 GB0714805D0 (en) 2007-09-12
GB2449949A GB2449949A (en) 2008-12-10
GB2449949B true GB2449949B (en) 2009-09-23

Family

ID=38528971

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0714805A Expired - Fee Related GB2449949B (en) 2007-06-08 2007-07-30 Driving apparatus for reporting states of light-emitting diode channels in a binary mode

Country Status (3)

Country Link
AU (1) AU2007203351B2 (en)
GB (1) GB2449949B (en)
TW (1) TWI318389B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022083274A1 (en) * 2020-10-19 2022-04-28 Oppo广东移动通信有限公司 Connection state detection circuit and method, and display panel

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10518848B2 (en) 2012-03-28 2019-12-31 Marine Depth Control Engineering, Llc Smart buoyancy compensation devices
TWI625532B (en) * 2017-03-21 2018-06-01 Failure detection system and method
CN118314842B (en) * 2024-06-11 2024-08-20 合肥为国半导体有限公司 Light driving circuit, backlight module, dimming method, display and electronic equipment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000343A (en) * 1977-06-21 1979-01-04 Vogel & Halke Control and fault-indicating circuitry for led-displays
US4541066A (en) * 1980-11-20 1985-09-10 Pfister Gmbh Method and apparatus for checking the functions of a display system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2000343A (en) * 1977-06-21 1979-01-04 Vogel & Halke Control and fault-indicating circuitry for led-displays
US4541066A (en) * 1980-11-20 1985-09-10 Pfister Gmbh Method and apparatus for checking the functions of a display system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022083274A1 (en) * 2020-10-19 2022-04-28 Oppo广东移动通信有限公司 Connection state detection circuit and method, and display panel

Also Published As

Publication number Publication date
TW200849173A (en) 2008-12-16
TWI318389B (en) 2009-12-11
GB0714805D0 (en) 2007-09-12
AU2007203351B2 (en) 2009-07-23
AU2007203351A1 (en) 2009-01-08
GB2449949A (en) 2008-12-10

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20160730