WO2017012138A1 - 一种可编程伽马电压输出装置和显示设备 - Google Patents

一种可编程伽马电压输出装置和显示设备 Download PDF

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Publication number
WO2017012138A1
WO2017012138A1 PCT/CN2015/085700 CN2015085700W WO2017012138A1 WO 2017012138 A1 WO2017012138 A1 WO 2017012138A1 CN 2015085700 W CN2015085700 W CN 2015085700W WO 2017012138 A1 WO2017012138 A1 WO 2017012138A1
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Prior art keywords
gamma voltage
output
controller
output device
digital signal
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PCT/CN2015/085700
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English (en)
French (fr)
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张先明
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深圳市华星光电技术有限公司
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Priority to US14/906,250 priority Critical patent/US9886205B2/en
Publication of WO2017012138A1 publication Critical patent/WO2017012138A1/zh

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    • 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
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/0614—Improving the reliability of storage systems
    • G06F3/0619—Improving the reliability of storage systems in relation to data integrity, e.g. data losses, bit errors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0646—Horizontal data movement in storage systems, i.e. moving data in between storage devices or systems
    • G06F3/065—Replication mechanisms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • G06F3/0679—Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/10—Input/output [I/O] data interface arrangements, e.g. I/O data control circuits, I/O data buffers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/16—Storage of analogue signals in digital stores using an arrangement comprising analogue/digital [A/D] converters, digital memories and digital/analogue [D/A] converters 
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C7/00—Arrangements for writing information into, or reading information out from, a digital store
    • G11C7/22—Read-write [R-W] timing or clocking circuits; Read-write [R-W] control signal generators or management 
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • 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
    • 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
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
    • 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
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
    • 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
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a programmable gamma voltage output device and a display device.
  • the programmable gamma correction buffer circuit chip (P-Gamma IC) is a common output chip applied to a high screen resolution display device, which outputs a gamma voltage according to the code code of the programming, and passes the gamma voltage. Realize the display of the screen. It can be seen that the quality of the gamma voltage output by the P-Gamma IC directly affects the display effect of the display device.
  • the output gamma voltage does not match the gamma voltage corresponding to the programmed Code, that is, the Code is lost, resulting in an abnormal output, and thus the display screen is defective or abnormal. Affects the display effect and reduces the user's viewing experience.
  • the embodiment of the invention provides a programmable gamma voltage output device and a display device, which can avoid outputting an abnormal gamma voltage and improve the display effect of the display device.
  • a first aspect of the embodiments of the present invention provides a programmable gamma voltage output device, including a nonvolatile memory, a controller, a digital signal generating module, a digital to analog converter DAC, and an output verifying module, the nonvolatile a memory is coupled to the controller, the controller is coupled to a digital signal generation module, the digital signal generation module is coupled to the analog to digital converter DAC, and the analog to digital converter DAC is coupled to the output verification module,
  • the output verification module is coupled to the controller, wherein:
  • the non-volatile memory is configured to back up a corresponding copy code when the voltage data code is burned;
  • the controller is configured to issue a control instruction to the digital signal generation module according to the voltage data code, or issue a control instruction to the digital signal generation module according to the copy code when the output verification module issues an error feedback ;
  • the digital signal generating module is configured to output a digital signal to the analog to digital converter DAC according to the control instruction;
  • the analog-to-digital converter DAC is configured to convert the digital signal into a gamma voltage and output the same;
  • the output verification module is configured to check whether the gamma voltage is in a preset voltage range, and if not, send an error feedback to the controller.
  • the non-volatile memory includes a preset backup area, where the preset backup area is used to store the copy code.
  • the output verification module includes a plurality of comparators and an AND gate element, wherein the non-inverting inputs of the respective comparators are different from the different digital-to-analog converters DAC The output terminals are connected, and the inverting input ends of the respective comparators are respectively connected to a preset reference voltage, and the output ends of the respective comparators are respectively connected to different input ends of the AND gate component, and the AND gate component The output is connected to the controller;
  • the controller is specifically configured to issue a control instruction according to the copy code when receiving the low level output by the AND gate element.
  • a third possible implementation when the difference between the gamma voltage received by the non-inverting input of the comparator and the reference voltage received by the inverting input is preset a voltage range to output a high level to the AND gate element, and a high level to the controller when all inputs of the AND gate element receive a high level,
  • the controller is further configured to continue to issue a control instruction according to the voltage data code upon receiving a high level of the output of the AND gate element.
  • the number of the comparators is less than or equal to the number of the analog-to-digital converter DACs.
  • the controller is further configured to: when the control instruction is issued according to the replica code, if the output verification module issues an error feedback again, stop issuing the control instruction and The power supply system of the programmable gamma voltage output device is turned off.
  • the power supply system includes a power supply and a pulse width modulation PWM chip.
  • the programmable gamma voltage output device further includes a gainer Buffer, and an input end of the gainer buffer is connected to an output of the analog-to-digital converter DAC.
  • the programmable gamma voltage output device further includes an operational amplifier, and an input end of the operational amplifier is coupled to an output of the gainer Buffer.
  • a second aspect of the embodiments of the present invention provides a display device including a display panel, a power supply system, and a programmable gamma voltage output device as mentioned in the first aspect above, the power supply system and the programmable gamma voltage An output device is coupled, and the programmable gamma voltage output device is coupled to the display panel.
  • the programmable gamma voltage output device in the embodiment of the present invention comprises a nonvolatile memory, a controller, a digital signal generating module, a digital-to-analog converter DAC and an output verifying module, wherein the non-volatile memory
  • the corresponding copy code is backed up when the voltage data code is programmed, the controller issues a control command according to the voltage data code, the digital signal generating module outputs a digital signal according to the control command, and the analog-to-digital converter DAC converts the digital signal into a gamma voltage and outputs the digital signal.
  • the output verification module sends an error feedback to the controller when it is verified that the gamma voltage is not within the preset voltage range, and the controller issues a control command according to the copy code, which can solve the problem of abnormal gamma voltage output and improve the display effect of the display device. .
  • FIG. 1 is a schematic structural diagram of a programmable gamma voltage output device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an output verification module according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of another programmable gamma voltage output device according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention.
  • the programmable gamma voltage output device is applied to a display device, which includes a high definition television, a tablet computer, a smart phone, a personal computer, a digital audio and video player, an electronic reader, a handheld game machine, and a vehicle.
  • a display device which includes a high definition television, a tablet computer, a smart phone, a personal computer, a digital audio and video player, an electronic reader, a handheld game machine, and a vehicle.
  • Electronic devices with high screen resolutions such as electronic devices.
  • the programmable gamma voltage output device in this embodiment includes a nonvolatile memory, a controller, a digital signal generating module, a digital to analog converter DAC, and an output verifying module, and the nonvolatile memory is connected to the controller.
  • the controller is connected to the digital signal generating module, the digital signal generating module is connected to the analog-to-digital converter DAC, the analog-to-digital converter DAC is connected to the output verification module, and the output verification module is connected to the controller.
  • non-volatile memory for backing up the corresponding copy code when programming the voltage data code.
  • NVM non-volatile memory
  • the non-volatile memory includes a preset backup area, such as a 512M storage area reserved in the non-volatile memory as a backup area, and the preset backup area is only when the write is written. Open for storing copy code.
  • the non-volatile memory stores the voltage data code and stores the code in the preset backup area as a copy code. It should be noted that the above voltage data code is a code indicating the magnitude and manner of generating the voltage.
  • the controller is configured to issue a control instruction to the digital signal generation module according to the voltage data code, or issue a control instruction to the digital signal generation module according to the copy code when the output verification module issues an error feedback.
  • the controller reads the voltage data code in the non-volatile memory, and issues a control instruction to the digital signal generating module according to the voltage data code; or the controller sends an error feedback in the output verification module ( Explain that the gamma voltage generated according to the voltage data code is different.
  • the copy code in the backup area of the non-volatile memory is read, and a control command is issued to the digital signal generating module according to the copy code. With this method, it is possible to correct the output by copying the copy code in advance when the output is abnormal.
  • a digital signal generating module is configured to output a digital signal to the analog to digital converter DAC according to the control command. It should be understood that the digital signal generating module shown in FIG. 1 includes 14 output ports, parallel outputs, and each output is connected to an analog to digital converter DAC.
  • An analog-to-digital converter DAC for converting a digital signal into a gamma voltage and outputting it.
  • each analog-to-digital converter DAC converts the digital signal it receives into a gamma voltage and outputs it.
  • the output verification module is used to check whether the gamma voltage is in a preset voltage range.
  • the preset voltage range here can be understood as the normal range of the gamma voltage. If it is in the preset voltage range, the gamma voltage output is normal. If it is not in the preset voltage range, the gamma voltage output is abnormal.
  • the output verification module can include multiple comparators and an AND gate component as shown in FIG. 2.
  • OUT1 to OUT14 represent the outputs of the first to the 14th digital-to-analog converter DACs, and the in-phase of each comparator
  • the input ends are respectively connected to the output ends of different digital-to-analog converters, and the inverting input ends of the respective comparators are respectively connected with a preset reference voltage, and the output ends of the respective comparators are respectively connected with different input ends of the AND gate elements.
  • the output of the AND gate element is connected to the controller.
  • the number of the comparators is not limited in this embodiment, and may be any number less than or equal to the number of analog-to-digital converter DACs.
  • the number of comparators may be four.
  • the non-inverting input terminals are respectively connected to the output ends of the first, seventh, eighth and ninth digital-to-analog converters DAC.
  • the reference voltages connected to the inverting terminals of the respective comparators may be the same or different, and may be set by the designer or the controller according to a specific scenario. It can be seen that a key invention of the present embodiment is to perform a range check on the gamma voltages of the selected plurality of outputs to determine whether the gamma voltage outputted by the entire programmable gamma voltage output device is abnormal.
  • the output verification module checks whether the gamma voltage is in a preset voltage range as follows: when the difference between the gamma voltage received by the non-inverting input of the comparator and the reference voltage received by the inverting input terminal is not preset
  • the voltage range outputs a low level to the AND gate component, and outputs a low level to the controller when any input of the AND gate component receives a low level; when the comparator's non-inverting input receives the gamma voltage and inverts
  • the difference between the reference voltages received at the input terminal outputs a high level to the AND gate element at a preset voltage range, and outputs a high level to the controller when all the input terminals of the AND gate element receive a high level.
  • the preset voltage range is related to the accuracy of the comparator. Generally, when the gamma voltage received by the non-inverting input of the comparator is equal to or close to the reference voltage received by the inverting input, the output of the comparator Output high level, otherwise output low level.
  • the controller receives the low level output by the AND gate component, it indicates that there is at least one gamma voltage output abnormality, and the controller issues a control command according to the replica code; if the controller receives the output of the AND gate component A high level indicates that the output is normal and the controller continues to issue control commands based on the voltage data code.
  • the controller when the controller issues a control command according to the replica code, if the output verification module issues an error feedback again, the controller stops issuing the control command and turns off the power supply system of the programmable gamma voltage output device.
  • the reason is that the gamma voltage output according to the original voltage data code and the backup copy code is abnormal at this time (the first test and the second test are abnormal), indicating that the output gamma voltage is basically disordered, in order to Without affecting the display, the controller stops issuing control commands and turns off the power supply system of the programmable gamma voltage output device.
  • the power supply system includes a power supply and a pulse width modulation PWM chip.
  • FIG. 3 is a schematic structural view of another programmable gamma voltage output device according to an embodiment of the present invention, and FIG. 3 is a detailed description and further supplementary description of FIG.
  • the programmable gamma voltage output device in this embodiment may further include a gain buffer and an operational amplifier.
  • the input of the gain buffer is connected to the output of the analog-to-digital converter DAC, and the input and gain of the operational amplifier are The output of the Buffer is connected, and the output of the operational amplifier is used as the output of the programmable gamma voltage output device, wherein:
  • the gainer Buffer can increase the gain of the gamma voltage of the digital-to-analog converter DAC output, and the operational amplifier can amplify the gain voltage to improve the drive.
  • the display device in this embodiment includes a display panel, a power supply system, and a programmable gamma voltage output device as described above, the power supply system is coupled to the programmable gamma voltage output device, and the programmable gamma voltage The output device is connected to the display panel, wherein:
  • the power supply system supplies power to the programmable gamma voltage output device, the programmable gamma voltage output device outputs a gamma voltage to the display panel, and the display panel displays the picture through the gamma voltage.
  • the programmable gamma voltage output device in the embodiment of the present invention comprises a nonvolatile memory, a controller, a digital signal generating module, a digital-to-analog converter DAC and an output verifying module, wherein the non-volatile memory
  • the corresponding copy code is backed up when the voltage data code is programmed, the controller issues a control command according to the voltage data code, the digital signal generating module outputs a digital signal according to the control command, and the analog-to-digital converter DAC converts the digital signal into a gamma voltage and outputs the digital signal.
  • the output verification module sends an error feedback to the controller when it is verified that the gamma voltage is not within the preset voltage range, and the controller issues a control command according to the copy code, which can solve the problem of abnormal gamma voltage output and improve the display effect of the display device. .
  • the layer blocks in the apparatus of the embodiment of the present invention may be combined, divided, and deleted according to actual needs.
  • the controller in the embodiment of the present invention may be implemented by an externally-connected integrated circuit, such as a CPU (Central Processing Unit) or an ASIC (Application Specific Integrated Circuit).
  • a CPU Central Processing Unit
  • ASIC Application Specific Integrated Circuit

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Abstract

一种可编程伽马电压输出装置，包括非易失性存储器、控制器、数字信号发生模块、数模转换器DAC和输出检验模块，非易失性存储器用于在烧录电压数据代码时备份对应的副本代码；控制器用于根据电压数据代码向数字信号发生模块发出控制指令，或者在输出检验模块发出错误反馈时根据副本代码向数字信号发生模块发出控制指令；数字信号发生模块用于根据控制指令向数模转换器DAC输出数字信号；数模转换器DAC用于将数字信号转换为伽马电压并输出；输出检验模块用于检验伽马电压是否处于预设的电压范围，若否，则向控制器发出错误反馈。还公开了一种显示设备。采该可编程伽马电压输出装置或显示设备，可以解决伽马电压输出异常的问题，提升显示设备的显示效果。

Description

一种可编程伽马电压输出装置和显示设备
本申请要求于2015年7月20日提交中国专利局，申请号为201510426893.0、发明名称为“一种可编程伽马电压输出装置和显示设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及显示技术领域，尤其涉及一种可编程伽马电压输出装置和显示设备。
背景技术
随着电子技术的不断发展，如平板电脑和高清电视等高屏幕分辨率显示设备越来越受用户青睐，同时，用户对其显示画面的品质也提出了更高的要求。其中，可编程伽马校正缓冲电路芯片(P-Gamma IC)是一种应用于高屏幕分辨率显示设备的常见输出芯片，其根据烧录的代码Code输出伽马电压，并通过伽马电压来实现画面的显示。由此可见，P-Gamma IC输出的伽马电压的好坏直接影响了显示设备的显示效果。
在P-Gamma IC运行过程中，可能会出现输出的伽马电压与烧录的Code对应的伽马电压不符的情况，即掉Code，导致输出异常，进而出现显示画面不良或不正常的问题，影响了显示效果，降低了用户的观赏体验。
发明内容
本发明实施例提供了一种可编程伽马电压输出装置和显示设备，可以避免输出异常的伽马电压，提升显示设备的显示效果。
本发明实施例第一方面提供了一种可编程伽马电压输出装置，包括非易失性存储器、控制器、数字信号发生模块、数模转换器DAC和输出检验模块，所述非易失性存储器与所述控制器连接，所述控制器与数字信号发生模块连接，所述数字信号发生模块与所述模数转换器DAC连接，所述模数转换器DAC与所述输出检验模块连接，所述输出检验模块与所述控制器连接，其中：
所述非易失性存储器，用于在烧录电压数据代码时备份对应的副本代码；
所述控制器，用于根据所述电压数据代码向所述数字信号发生模块发出控制指令，或者在所述输出检验模块发出错误反馈时根据所述副本代码向所述数字信号发生模块发出控制指令；
所述数字信号发生模块，用于根据所述控制指令向所述模数转换器DAC输出数字信号；
所述模数转换器DAC，用于将所述数字信号转换为伽马电压并输出；
所述输出检验模块，用于检验所述伽马电压是否处于预设的电压范围，若否，则向所述控制器发出错误反馈。
在第一方面的第一种可能实现方式中，所述非易失性存储器包括预设的备份区，所述预设的备份区用于存储所述副本代码。
在第一方面的第二种可能实现方式中，所述输出检验模块包括多个比较器和一个与门元件，各个所述比较器的同相输入端分别与不同的所述数模转换器DAC的输出端连接，各个所述比较器的反相输入端分别与预设的基准电压连接，各个所述比较器的输出端分别与所述与门元件的不同输入端连接，所述与门元件的输出端与所述控制器连接；
当所述比较器的同相输入端接收的伽马电压与反相输入端接收的基准电压的差值不在预设的电压范围时向所述与门元件输出低电平，当所述与门元件的任意一个输入端接收到低电平时向所述控制器输出低电平，
所述控制器，具体用于在接收到所述与门元件输出的低电平时根据所述副本代码发出控制指令。
结合第一方面的第二种可能实现方式，在第三种可能实现方式中，当所述比较器的同相输入端接收的伽马电压与反相输入端接收的基准电压的差值在预设的电压范围时向所述与门元件输出高电平，当所述与门元件的所有输入端均接收到高电平时向所述控制器输出高电平，
所述控制器，还具体用于在接收到所述与门元件输出的高电平时继续根据所述电压数据代码发出控制指令。
结合第一方面的第二种可能实现方式，在第四种可能实现方式中，所述比较器的个数小于或等于所述模数转换器DAC的个数。
在第五种可能实现方式中，所述控制器，还用于在根据所述副本代码发出控制指令时，若所述输出检验模块再次发出错误反馈，则停止发出控制指令并 关闭所述可编程伽马电压输出装置的供电系统。
结合第一方面的第五种可能实现方式，在第六种可能实现方式中，所述供电系统包括电源和脉冲宽度调制PWM芯片。
在第七种可能实现方式中，所述可编程伽马电压输出装置还包括增益器Buffer，所述增益器Buffer的输入端与所述模数转换器DAC的输出端连接。
在第八种可能实现方式中，所述可编程伽马电压输出装置还包括运算放大器，所述运算放大器的输入端与所述增益器Buffer的输出端连接。
本发明实施例第二方面提供了一种显示设备，包括显示屏面板、供电系统和如上述第一方面提及的可编程伽马电压输出装置，所述供电系统与所述可编程伽马电压输出装置连接，所述可编程伽马电压输出装置与所述显示屏面板连接。
由上可见，本发明实施例中的可编程伽马电压输出装置，包括非易失性存储器、控制器、数字信号发生模块、数模转换器DAC和输出检验模块，其中，非易失性存储器在烧录电压数据代码时备份对应的副本代码，控制器根据电压数据代码发出控制指令，数字信号发生模块根据控制指令输出数字信号，模数转换器DAC将数字信号转换为伽马电压并输出，输出检验模块在检验出伽马电压未处于预设的电压范围时向控制器发出错误反馈，进而控制器根据副本代码发出控制指令，可以解决伽马电压输出异常的问题，提升显示设备的显示效果。
附图说明
为了更清楚地说明本发明实施例，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种可编程伽马电压输出装置的结构示意图；
图2是本发明实施例提供的一种输出检验模块的结构示意图；
图3是本发明实施例提供的另一种可编程伽马电压输出装置的结构示意 图；
图4是本发明实施例提供的一种显示设备的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例提供的可编程伽马电压输出装置应用于显示设备，所述显示设备包括高清电视、平板电脑、智能手机、个人电脑、数字音视频播放器、电子阅读器、手持游戏机和车载电子设备等高屏幕分辨率的电子设备。
图1是本发明实施例中一种可编程伽马电压输出装置的结构示意图。如图所示本实施例中的可编程伽马电压输出装置包括非易失性存储器、控制器、数字信号发生模块、数模转换器DAC和输出检验模块，非易失性存储器与控制器连接，控制器与数字信号发生模块连接，数字信号发生模块与模数转换器DAC连接，模数转换器DAC与输出检验模块连接，输出检验模块与控制器连接。
非易失性存储器，用于在烧录电压数据代码时备份对应的副本代码。其中，非易失性存储器(non-volatile memory，NVM)是一种掉电后存储数据不丢失的计算机存储器。本实施例中，非易失性存储器包括预设的备份区，如在非易失性存储器中预留512M的存储区域作为备份区，预设的备份区只有在烧录写入的时候才会开放，用于存储副本代码。具体实现过程中，非易失性存储器在烧录电压数据代码的同时，将该代码也存储到预设的备份区作为副本代码。需要指出的是，上述电压数据代码为指示产生电压的大小和方式的代码。
控制器，用于根据电压数据代码向数字信号发生模块发出控制指令，或者在输出检验模块发出错误反馈时根据副本代码向数字信号发生模块发出控制指令。具体实现过程中，在上电后，控制器读取非易失性存储器中的电压数据代码，并根据电压数据代码向数字信号发生模块发出控制指令；或者控制器在输出检验模块发出错误反馈(说明根据电压数据代码产生的伽马电压出现异 常)时，转而读取非易失性存储器的备份区中的副本代码，并根据副本代码向数字信号发生模块发出控制指令。通过该方法，可以在输出异常时，通过预先备份的副本代码矫正输出。
数字信号发生模块，用于根据控制指令向模数转换器DAC输出数字信号。应理解地，如图1所示的数字信号发生模块包括14路输出端口，并行输出，每路输出与一个模数转换器DAC连接。
模数转换器DAC，用于将数字信号转换为伽马电压并输出。具体实现过程中，每个模数转换器DAC将其接收的数字信号转换为伽马电压并输出。
输出检验模块，用于检验伽马电压是否处于预设的电压范围，这里的预设的电压范围可以理解为伽马电压的正常范围，若处于预设的电压范围，则说明伽马电压输出正常，若未处于预设的电压范围，则说明伽马电压输出异常。
具体实现过程中，输出检验模块可以如图2所示包括多个比较器和一个与门元件，图中OUT1至OUT14表示第1至第14路数模转换器DAC的输出，各个比较器的同相输入端分别与不同的数模转换器DAC的输出端连接，各个比较器的反相输入端分别与预设的基准电压连接，各个比较器的输出端分别与与门元件的不同输入端连接，与门元件的输出端与控制器连接。
需要指出的是，本实施例对比较器的个数不作具体限定，可以是小于或等于模数转换器DAC的个数任意数目，例如：如图2所示，比较器的个数可以是4个，其同相输入端分别与第一路、第七路、第八路和第九路数模转换器DAC的输出端连接。应理解地，比较器的个数越多，被检测的输出的路数越多，检测效果越好，但成本相应越高。另外，各个比较器的反相端所接的基准电压可以相同，也可以不同，由设计人员或控制器根据具体场景进行设定。可见，本实施例的一个关键发明点是对抽选出的多组输出的伽马电压进行范围检验，以此确定整个可编程伽马电压输出装置输出的伽马电压是否异常。
相应地，输出检验模块检验所述伽马电压是否处于预设的电压范围的原理如下：当比较器的同相输入端接收的伽马电压与反相输入端接收的基准电压的差值不在预设的电压范围时向与门元件输出低电平，当与门元件的任意一个输入端接收到低电平时向控制器输出低电平；当比较器的同相输入端接收的伽马电压与反相输入端接收的基准电压的差值在预设的电压范围时向与门元件输出高电平，当与门元件的所有输入端均接收到高电平时向控制器输出高电平。 需要指出的是，预设的电压范围与比较器的精度相关，一般地，当比较器的同相输入端接收的伽马电压等于或接近反相输入端接收的基准电压时，比较器的输出端输出高电平，反之输出低电平。
进一步地，控制器若接收到与门元件输出的低电平，则说明存在至少一路输出异常的伽马电压，此时控制器根据副本代码发出控制指令；控制器若接收到与门元件输出的高电平，则说明输出正常，控制器继续根据电压数据代码发出控制指令。
更进一步地，控制器在根据副本代码发出控制指令时，若输出检验模块再次发出错误反馈，则停止发出控制指令并关闭可编程伽马电压输出装置的供电系统。原因在于，此时根据原始电压数据代码和备份的副本代码输出的伽马电压均异常(第一次检验和第二次检验均异常)，说明输出的伽马电压基本是杂乱无序的，为了不影响显示，控制器停止发出控制指令并关闭可编程伽马电压输出装置的供电系统。需要指出的是，供电系统包括电源和脉冲宽度调制PWM芯片。
图3是本发明实施例中另一种可编程伽马电压输出装置的结构示意图，图3是对图2的详细说明和进一步的补充说明。如图所示本实施例中的可编程伽马电压输出装置还可以包括增益器Buffer和运算放大器，增益器Buffer的输入端与模数转换器DAC的输出端连接，运算放大器的输入端与增益器Buffer的输出端连接，运算放大器的输出端作为可编程伽马电压输出装置的输出端，其中：
增益器Buffer可以提高数模转换器DAC输出的伽马电压的增益，运算放大器可以对增益后的电压进行放大以提高驱动。
图4是本发明实施例中一种显示设备的结构示意图。如图所示本实施例中的显示设备包括显示屏面板、供电系统以及结合上文所描述的可编程伽马电压输出装置，供电系统与可编程伽马电压输出装置连接，可编程伽马电压输出装置与显示屏面板连接，其中：
供电系统向可编程伽马电压输出装置提供电能，可编程伽马电压输出装置向显示屏面板输出伽马电压，显示屏面板通过伽马电压实现画面的显示。
由上可见，本发明实施例中的可编程伽马电压输出装置，包括非易失性存储器、控制器、数字信号发生模块、数模转换器DAC和输出检验模块，其中，非易失性存储器在烧录电压数据代码时备份对应的副本代码，控制器根据电压数据代码发出控制指令，数字信号发生模块根据控制指令输出数字信号，模数转换器DAC将数字信号转换为伽马电压并输出，输出检验模块在检验出伽马电压未处于预设的电压范围时向控制器发出错误反馈，进而控制器根据副本代码发出控制指令，可以解决伽马电压输出异常的问题，提升显示设备的显示效果。
本发明实施例装置中的层块可以根据实际需要进行合并、划分和删减。
本发明实施例中所述控制器，可以通过外接通用集成电路，例如CPU(Central Processing Unit，中央处理器)，或通过ASIC(Application Specific Integrated Circuit，专用集成电路)来实现。
以上所揭露的仅为本实用新型较佳实施例而已，当然不能以此来限定本实用新型之权利范围，因此依本实用新型权利要求所作的等同变化，仍属本实用新型所涵盖的范围。

Claims (10)

  1. 一种可编程伽马电压输出装置，其特征在于，所述可编程伽马电压输出装置包括非易失性存储器、控制器、数字信号发生模块、数模转换器DAC和输出检验模块，所述非易失性存储器与所述控制器连接，所述控制器与所述数字信号发生模块连接，所述数字信号发生模块与所述模数转换器DAC连接，所述模数转换器DAC与所述输出检验模块连接，所述输出检验模块与所述控制器连接，其中：
    所述非易失性存储器，用于在烧录电压数据代码时备份对应的副本代码；
    所述控制器，用于根据所述电压数据代码向所述数字信号发生模块发出控制指令，或者在所述输出检验模块发出错误反馈时根据所述副本代码向所述数字信号发生模块发出控制指令；
    所述数字信号发生模块，用于根据所述控制指令向所述模数转换器DAC输出数字信号；
    所述模数转换器DAC，用于将所述数字信号转换为伽马电压并输出；
    所述输出检验模块，用于检验所述伽马电压是否处于预设的电压范围，若否，则向所述控制器发出错误反馈。
  2. 如权利要求1所述的可编程伽马电压输出装置，其特征在于，所述非易失性存储器包括预设的备份区，所述预设的备份区用于存储所述副本代码。
  3. 如权利要求1所述的可编程伽马电压输出装置，其特征在于，所述输出检验模块包括多个比较器和一个与门元件，各个所述比较器的同相输入端分别与不同的所述数模转换器DAC的输出端连接，各个所述比较器的反相输入端分别与预设的基准电压连接，各个所述比较器的输出端分别与所述与门元件的不同输入端连接，所述与门元件的输出端与所述控制器连接；
    当所述比较器的同相输入端接收的伽马电压与反相输入端接收的基准电压的差值不在预设的电压范围时向所述与门元件输出低电平，当所述与门元件的任意一个输入端接收到低电平时向所述控制器输出低电平，
    所述控制器，具体用于在接收到所述与门元件输出的低电平时根据所述副 本代码发出控制指令。
  4. 如权利要求3所述的可编程伽马电压输出装置，其特征在于，
    当所述比较器的同相输入端接收的伽马电压与反相输入端接收的基准电压的差值在预设的电压范围时向所述与门元件输出高电平，当所述与门元件的所有输入端均接收到高电平时向所述控制器输出高电平，
    所述控制器，还具体用于在接收到所述与门元件输出的高电平时继续根据所述电压数据代码发出控制指令。
  5. 如权利要求3所述的可编程伽马电压输出装置，其特征在于，所述比较器的个数小于或等于所述模数转换器DAC的个数。
  6. 如权利要求1所述的可编程伽马电压输出装置，其特征在于，所述控制器，还用于在根据所述副本代码发出控制指令时，若所述输出检验模块再次发出错误反馈，则停止发出控制指令并关闭所述可编程伽马电压输出装置的供电系统。
  7. 如权利要求6所述的可编程伽马电压输出装置，其特征在于，所述供电系统包括电源和脉冲宽度调制PWM芯片。
  8. 如权利要求1所述的可编程伽马电压输出装置，其特征在于，所述可编程伽马电压输出装置还包括增益器Buffer，所述增益器Buffer的输入端与所述模数转换器DAC的输出端连接。
  9. 如权利要求1所述的可编程伽马电压输出装置，其特征在于，所述可编程伽马电压输出装置还包括运算放大器，所述运算放大器的输入端与所述增益器Buffer的输出端连接。
  10. 一种显示设备，其特征在于，所述显示设备包括显示屏面板、供电系统和如权利要求1-9任一项所述的可编程伽马电压输出装置，所述供电系统与 所述可编程伽马电压输出装置连接，所述可编程伽马电压输出装置与所述显示屏面板连接。
PCT/CN2015/085700 2015-07-20 2015-07-31 一种可编程伽马电压输出装置和显示设备 WO2017012138A1 (zh)

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