CN116301681A - Display device and its screen traceback method - Google Patents

Display device and its screen traceback method Download PDF

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Publication number
CN116301681A
CN116301681A CN202111563877.8A CN202111563877A CN116301681A CN 116301681 A CN116301681 A CN 116301681A CN 202111563877 A CN202111563877 A CN 202111563877A CN 116301681 A CN116301681 A CN 116301681A
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display device
image
display
screen
display controller
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高金圳
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Jichen Co ltd
Giga Byte Technology Co Ltd
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Jichen Co ltd
Giga Byte Technology Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/14Digital output to display device ; Cooperation and interconnection of the display device with other functional units
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input 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
    • G06F3/06Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601Interfaces specially adapted for storage systems
    • G06F3/0628Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0655Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
    • G06F3/0656Data buffering arrangements

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  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

A display device, comprising: an image buffer; a display module; and a display controller for receiving an image signal from a host and storing the image signal in the image buffer. In response to the display controller receiving a trigger signal, the display controller controls the display device to enter a picture backtracking mode. The display controller takes out the backtracking image corresponding to the backtracking time point from the image buffer according to a user instruction, and plays the backtracking image on the display module.

Description

显示装置及其画面回溯方法Display device and its screen traceback method

技术领域technical field

本发明涉及显示装置,特别涉及一种显示装置及其画面回溯方法。The present invention relates to a display device, in particular to a display device and a method for recalling a picture thereof.

背景技术Background technique

因为科技进步,电脑使用者每天使用显示器的时间也愈来愈长。然而,使用者在操作电脑时往往会忘记先前已执行过的操作,而无法回复到所期望的前一步骤,或是使用者会想要观看先前已观赏过的屏幕画面。然而,传统的显示装置并不具备画面回溯功能,故有时会造成使用者的不便。Due to advances in technology, computer users spend more and more time using monitors every day. However, when operating the computer, the user often forgets the operation performed before, and cannot return to the desired previous step, or the user wants to watch the screen image that has been watched before. However, conventional display devices do not have the function of recalling images, which sometimes causes inconvenience to users.

发明内容Contents of the invention

有鉴于此,本发明提供一种显示装置及其画面回溯方法以解决上述问题。In view of this, the present invention provides a display device and a frame backtracking method thereof to solve the above problems.

本发明提供一种显示装置,包括:一影像缓冲器;一显示模块;以及一显示控制器,用以从一主机接收一影像信号,并将该影像信号存储于该影像缓冲器。因应于该显示控制器接收到一触发信号,该显示控制器控制该显示装置进入一画面回溯模式。该显示控制器依据一使用者指令以从该影像缓冲器取出相应于回溯时间点的回溯影像,并将该回溯影像在该显示模块上播放。The invention provides a display device, comprising: an image buffer; a display module; and a display controller, used for receiving an image signal from a host and storing the image signal in the image buffer. In response to the display controller receiving a trigger signal, the display controller controls the display device to enter a frame retracement mode. The display controller fetches the retrospective image corresponding to the retrospective time point from the image buffer according to a user instruction, and plays the retrospective image on the display module.

在一些实施例中,该显示控制器先压缩该影像信号以得到压缩影像信号,并将该压缩影像信号存储至该影像缓冲器。当该显示装置处于该画面回溯模式,该显示控制器从该影像缓冲器取得相应于该回溯时间点的该压缩影像信号,并对该压缩影像信号进行解压缩以得到该回溯影像。In some embodiments, the display controller first compresses the image signal to obtain a compressed image signal, and stores the compressed image signal into the image buffer. When the display device is in the frame lookback mode, the display controller obtains the compressed image signal corresponding to the lookback time point from the image buffer, and decompresses the compressed image signal to obtain the lookback image.

在一些实施例中,该影像缓冲器存储一预定时间间隔内的该压缩影像信号,且该显示控制器使用一先进先出机制以将该压缩影像信号存储至该影像缓冲器。In some embodiments, the image buffer stores the compressed image signal for a predetermined time interval, and the display controller uses a first-in-first-out mechanism to store the compressed image signal into the image buffer.

在一些实施例中,该显示装置还包括:一输入界面,其中该输入界面包括一第一功能按键、一第二功能按键及一第三功能按键,其中该第二功能按键用以产生该触发信号以开启或关闭该显示装置的该画面回溯模式,该第一功能按键及该第三功能按键用以产生该使用者指令,并分别控制在该画面回溯模式中的画面回卷功能及画面往后功能。In some embodiments, the display device further includes: an input interface, wherein the input interface includes a first function key, a second function key and a third function key, wherein the second function key is used to generate the trigger signal to turn on or off the screen recall mode of the display device, the first function button and the third function button are used to generate the user instruction, and respectively control the screen scroll function and screen forward in the screen traceback mode post function.

在一些实施例中,当该显示装置处于该画面回溯模式且一使用者按下该第一功能按键或该第三功能按键并放开时,该显示控制器从目前的搜索时间点往前或往后一预定秒数以得到该回溯时间点,并且从该影像缓冲器取得该回溯时间点相应的该回溯影像。In some embodiments, when the display device is in the screen backtracking mode and a user presses the first function button or the third function button and releases it, the display controller will go forward or backward from the current search time point Go back a predetermined number of seconds to obtain the lookback time point, and obtain the lookback image corresponding to the lookback time point from the image buffer.

在一些实施例中,当该显示装置处于该画面回溯模式且一使用者持续按住该第一功能按键或该第三功能按键时,该显示控制器从目前的搜索时间点快速往前或往后搜索该回溯影像。In some embodiments, when the display device is in the screen backtracking mode and a user keeps pressing the first function button or the third function button, the display controller will quickly move forward or forward from the current search time point Then search for the backtracking image.

在一些实施例中,当该显示装置处于该画面回溯模式且该显示控制器从该第二功能按键接收到该触发信号,该显示控制器控制该显示装置回到一般画面模式。In some embodiments, when the display device is in the frame recall mode and the display controller receives the trigger signal from the second function key, the display controller controls the display device to return to the normal frame mode.

在一些实施例中,因应于该显示装置进入该画面回溯模式,该显示控制器停止写入该影像信号至该影像缓冲器。In some embodiments, in response to the display device entering the frame lookback mode, the display controller stops writing the image signal to the image buffer.

本发明更提供一种显示装置的画面回溯方法,其中该显示装置包括一影像缓冲器、一显示模块及一显示控制器,该方法包括:利用该显示控制器从一主机接收一影像信号,并将该影像信号存储于该影像缓冲器;因应于该显示控制器接收到一触发信号,利用该显示控制器控制该显示装置进入一画面回溯模式;以及利用该显示控制器依据一使用者指令以从该影像缓冲器取出相应于回溯时间点的回溯影像,并将该回溯影像在该显示模块上播放。The present invention further provides a frame backtracking method for a display device, wherein the display device includes an image buffer, a display module, and a display controller, and the method includes: using the display controller to receive an image signal from a host, and storing the image signal in the image buffer; in response to receiving a trigger signal from the display controller, using the display controller to control the display device to enter a frame backtracking mode; and using the display controller according to a user instruction to The retrospective image corresponding to the retrospective time point is taken out from the image buffer, and played on the display module.

附图说明Description of drawings

图1为依据本发明一实施例中的电脑系统的方框图。FIG. 1 is a block diagram of a computer system according to an embodiment of the invention.

图2A-2C为依据本发明一实施例中的回溯影像的示意图。2A-2C are schematic diagrams of retrospective images according to an embodiment of the present invention.

图3为依据本发明一实施例中的显示装置的画面回溯方法的流程图。FIG. 3 is a flow chart of a frame backtracking method of a display device according to an embodiment of the invention.

附图标记说明:Explanation of reference signs:

10:主机10: Host

11:影像信号11: Image signal

20:使用者20: User

100:显示装置100: display device

110:显示控制器110: display controller

111:影像缩放器111: Image Resizer

112:时序控制器112: Timing controller

120:显示模块120: display module

130:存储装置130: storage device

131:固件131: Firmware

132:屏幕上显示界面132: Display interface on the screen

140:影像缓冲器140: image buffer

141:第一存储空间141: The first storage space

142:第二存储空间142: Second storage space

150:传输接口150: transmission interface

160:输入接口160: input interface

161:实体按钮161: Physical button

162:五向控制杆162: Five-way joystick

1631-1633:功能按键1631-1633: Function keys

170:多工器170: Multiplexer

171-172:路径171-172: paths

202、204、206:回溯影像202, 204, 206: Retrospective images

211:时间列211: time column

S310~S320:步骤S310~S320: steps

具体实施方式Detailed ways

为使本发明的上述目的、特征和优点能更明显易懂,下文特举一较佳实施例,并配合说明书附图,作详细说明如下。In order to make the above objects, features and advantages of the present invention more comprehensible, a preferred embodiment will be described in detail below together with the accompanying drawings.

图1为依据本发明一实施例中的显示装置的方框图。FIG. 1 is a block diagram of a display device according to an embodiment of the invention.

如图1所示,主机10信号连接至显示装置100。举例来说,主机10例如可为一个人电脑、服务器、电视棒/电视盒、机上盒、游戏机、DVD/蓝光播放机或是其他具有影像输出功能的设备。显示装置100例如可为平面显示器、电视、投影机、电脑屏幕等装置,但本发明并不限于此。显示装置100包括显示控制器110、显示模块120、存储装置130、影像缓冲器140、传输接口150、输入接口160及多工电路170。As shown in FIG. 1 , the host 10 is signal-connected to the display device 100 . For example, the host 10 can be a personal computer, server, TV stick/box, set-top box, game console, DVD/Blu-ray player or other devices with image output function. The display device 100 can be, for example, a flat panel display, a television, a projector, a computer screen, etc., but the present invention is not limited thereto. The display device 100 includes a display controller 110 , a display module 120 , a storage device 130 , an image buffer 140 , a transmission interface 150 , an input interface 160 and a multiplexing circuit 170 .

显示控制器110例如可为一应用导向集成电路(application-specificintegrated circuit)、一芯片系统(System-on-chip)、一处理器、或一微控制器(microcontroller),但本发明并不限于此。The display controller 110 can be, for example, an application-specific integrated circuit, a system-on-chip, a processor, or a microcontroller, but the present invention is not limited thereto .

显示模块120例如可为一液晶(liquid crystal)面板(含背光模块)、一发光二极管(light-emitting diode)面板、一有机发光二极管(organic light-emitting diode)面板、一阴极射线管(cathode ray tube)、电子墨水(E-Ink)显示模块、电致发光(electroluminescent)显示模块、等离子体(Plasma)显示模块、投影(projection)显示模块、量子点(Quantum Dot)显示模块、但本发明并不限于此。The display module 120 can be, for example, a liquid crystal (liquid crystal) panel (including a backlight module), a light-emitting diode (light-emitting diode) panel, an organic light-emitting diode (organic light-emitting diode) panel, a cathode ray tube (cathode ray tube) tube), electronic ink (E-Ink) display module, electroluminescent (electroluminescent) display module, plasma (Plasma) display module, projection (projection) display module, quantum dot (Quantum Dot) display module, but the present invention does not Not limited to this.

存储装置130例如可为一非易失性存储器,例如只读存储器(ROM)、可抹除可编程只读存储器(EPROM)、电子抹除式可编程只读存储器(EEPROM)。存储装置130用以存储显示装置100相关的固件131。存储装置130例如可在显示控制器110的外部、或是可整合至显示控制器110中。The storage device 130 can be, for example, a non-volatile memory, such as a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or an electronically erasable programmable read-only memory (EEPROM). The storage device 130 is used for storing the firmware 131 related to the display device 100 . The storage device 130 can be external to the display controller 110 , or can be integrated into the display controller 110 , for example.

固件131例如包括显示装置100的屏幕上显示界面的显示设定及延伸显示能力识别数据(Extended Display Identification Data,EDID)、显示设定、一或多个屏幕上显示界面(on-screen-display(OSD)interface)132。延伸显示能力识别数据例如包括显示装置100的制造厂商、产品名称、分辨率、每秒显示帧数等等。显示设定例如包括显示装置100的亮度、对比、锐利度、色温等设定。The firmware 131 includes, for example, display settings and extended display capability identification data (Extended Display Identification Data, EDID) of the on-screen display interface of the display device 100, display settings, one or more on-screen display interfaces (on-screen-display( OSD) interface) 132. The extended display capability identification data includes, for example, the manufacturer of the display device 100 , product name, resolution, display frames per second, and so on. The display settings include, for example, settings of brightness, contrast, sharpness, color temperature, etc. of the display device 100 .

传输接口150可包括有线传输接口及/或无线传输接口,其中有线传输接口可包括:高分辨率多媒体接口(High Definition Multimedia Interface,HDMI)、显示埠(显示端,DisplayPort,DP)接口、嵌入式显示埠(embedded DisplayPort,eDP)、接口通用序列总线(Universal Serial Bus,USB)接口、USB Type-C接口、雷雳(Thunderbolt)接口、数字视频接口(DVI)、视频图形阵列(VGA)接口、一般用途输入输出(GPIO)接口、通用异步收发传输器(UART)接口、序列周边接口(SPI)接口、集成电路总线(I2C)接口、或其组合,且无线传输接口可包括:蓝牙(Bluetooth)、WiFi、近场通信(NFC)接口等等,但本发明并不限于此。The transmission interface 150 may include a wired transmission interface and/or a wireless transmission interface, wherein the wired transmission interface may include: a high-definition multimedia interface (High Definition Multimedia Interface, HDMI), a display port (display terminal, DisplayPort, DP) interface, an embedded Display port (embedded DisplayPort, eDP), interface Universal Serial Bus (Universal Serial Bus, USB) interface, USB Type-C interface, Thunderbolt (Thunderbolt) interface, digital video interface (DVI), video graphics array (VGA) interface, General purpose input and output (GPIO) interface, universal asynchronous transceiver (UART) interface, serial peripheral interface (SPI) interface, integrated circuit bus (I2C) interface, or a combination thereof, and the wireless transmission interface may include: Bluetooth (Bluetooth) , WiFi, Near Field Communication (NFC) interface, etc., but the present invention is not limited thereto.

在一实施例中,显示控制器110可通过一总线(例如I2C总线)以读取存储于存储装置130中的固件131及屏幕上显示界面132的程序码,并据以设定相关的显示参数。此外,显示控制器110亦可通过传输接口150以将显示装置100的延伸显示能力识别数据传送至主机10,以供主机10设定所要输出的影像信号的分辨率及相关的同步信号。屏幕上显示界面132例如包括屏幕上显示选单(OSD Menu)及选项、信息显示界面(information dashboard)、计时器、计数器、准星(crosshair)、特定符号、特定颜色、特定文字、或其组合,但本发明并不限于此。In one embodiment, the display controller 110 can read the program codes of the firmware 131 and the on-screen display interface 132 stored in the storage device 130 through a bus (such as an I2C bus), and set related display parameters accordingly. . In addition, the display controller 110 can also transmit the identification data of the extended display capability of the display device 100 to the host 10 through the transmission interface 150, so that the host 10 can set the resolution of the image signal to be output and the related synchronization signal. The on-screen display interface 132 includes, for example, an on-screen display menu (OSD Menu) and options, an information display interface (information dashboard), a timer, a counter, a crosshair, a specific symbol, a specific color, a specific text, or a combination thereof, but The present invention is not limited thereto.

在一实施例中,显示控制器110包括一影像缩放器(image scaler)111及一时序控制器(timing controller)112。显示控制器110通过传输接口150以接收来自主机10的影像信号及/或来自其他主机的影像信号,且影像缩放器111可将所接收的影像信号11中的影像进行影像缩放处理及/或影像叠合处理以符合显示模块120的分辨率,并将经过影像缩放处理后的影像(例如称为输出影像)存储至影像缓冲器140。时序控制器112则控制显示模块120从影像缓冲器140读取输出影像并播放。In one embodiment, the display controller 110 includes an image scaler (image scaler) 111 and a timing controller (timing controller) 112 . The display controller 110 receives image signals from the host 10 and/or image signals from other hosts through the transmission interface 150, and the image scaler 111 can perform image scaling processing and/or image processing on the images in the received image signals 11. The overlapping process is performed to meet the resolution of the display module 120 , and the image after the image scaling process (for example, referred to as an output image) is stored in the image buffer 140 . The timing controller 112 controls the display module 120 to read the output image from the image buffer 140 and play it.

在另一实施例中,显示控制器110可包括时序控制器112,且来自主机10的影像信号11的分辨率符合显示模块120的分辨率,故显示控制器110接收到来自主机10的影像信号后可不必经过影像缩放处理就将影像信号存储于影像缓冲器140中。时序控制器120可由从影像缓冲器140读取输出影像,并控制显示模块120以播放输出影像。In another embodiment, the display controller 110 may include a timing controller 112, and the resolution of the image signal 11 from the host 10 matches the resolution of the display module 120, so the display controller 110 receives the image signal from the host 10 Afterwards, the image signal can be stored in the image buffer 140 without image scaling processing. The timing controller 120 can read the output image from the image buffer 140 and control the display module 120 to play the output image.

影像缓冲器140例如可为一挥发性存储器(例如动态随机存取存储器)或一非易失性存储器(例如快闪存储器),其用以存储来自主机10的影像信号11或是存储由显示控制器110压缩后的影像信号11,并且可存储一预定时间内(例如10分钟或更长时间)的影像信号以供显示装置100的画面回溯功能使用。The image buffer 140 can be, for example, a volatile memory (such as a dynamic random access memory) or a nonvolatile memory (such as a flash memory), which is used to store the image signal 11 from the host computer 10 or store the image signal 11 controlled by the display. The image signal 11 compressed by the device 110 can store the image signal for a predetermined period of time (for example, 10 minutes or longer) for use by the frame recall function of the display device 100 .

举例来说,影像缓冲器140包括第一存储空间141及第二存储空间142。当显示装置100通过传输接口150从主机10接收影像信号11时,多工器170会将影像信号11通过路径171传送至显示控制器110、且/或通过路径172将影像信号11写入至影像缓冲器140的第一存储空间141。第一存储空间140例如做为一般画面模式下的输出影像缓冲器,且第二存储空间142例如做为画面回溯模式下的输出影像缓冲器。For example, the image buffer 140 includes a first storage space 141 and a second storage space 142 . When the display device 100 receives the image signal 11 from the host 10 through the transmission interface 150, the multiplexer 170 will transmit the image signal 11 to the display controller 110 through the path 171, and/or write the image signal 11 into the image through the path 172. The first storage space 141 of the buffer 140 . The first storage space 140 is, for example, used as an output image buffer in the normal frame mode, and the second storage space 142 is, for example, used as an output image buffer in the frame traceback mode.

输入接口160用以控制显示装置100的屏幕上显示选单以及画面回溯功能的开启/关闭。在一些实施例中,输入接口160例如可由一五向控制杆162或是由五个实体按钮161所实现,借此实现上、下、左、右、及确认等指令。此外,输入接口160还包括一或多个功能按键1631-1633,其中功能按键1632用以开启或关闭显示装置100的画面回溯功能,功能按键1631及1632则执行画面回卷(rewind)及画面往后(forward)等功能。The input interface 160 is used for controlling on/off of the menu displayed on the screen of the display device 100 and the screen recall function. In some embodiments, the input interface 160 can be realized by, for example, a five-way joystick 162 or five physical buttons 161 , so as to realize commands such as up, down, left, right, and confirmation. In addition, the input interface 160 also includes one or more function keys 1631-1633, wherein the function key 1632 is used to enable or disable the screen recall function of the display device 100, and the function keys 1631 and 1632 execute screen rewind and screen rewind. After (forward) and other functions.

在一实施例中,当使用者进行五向控制杆162的其中一个方向的操作(或是按下其中一个实体按钮161时,显示控制器110可从存储装置130读取固件132以及屏幕上显示界面132中的屏幕上显示选单及相关选项的程序码,并在显示模块120上显示屏幕上显示选单及相关选项。在一实施例中,使用者可在输入接口160上进行操作以控制显示装置100的屏幕上显示选单,进而调整显示模块120的亮度、对比、锐利度、色温、或开启或关闭屏幕上显示界面132中的其他界面。举例来说,固件131例如可视为显示装置100的预设固件,且使用者可经由五向控制杆162(或实体按钮161)以控制显示装置100所显示的屏幕上显示界面132的选项设定。In one embodiment, when the user operates one of the directions of the five-way joystick 162 (or presses one of the physical buttons 161), the display controller 110 can read the firmware 132 from the storage device 130 and display on the screen. The program codes of menus and related options are displayed on the screen in the interface 132, and the menus and related options are displayed on the display screen on the display module 120. In one embodiment, the user can operate on the input interface 160 to control the display device The menu is displayed on the screen of the display device 100, thereby adjusting the brightness, contrast, sharpness, color temperature of the display module 120, or opening or closing other interfaces in the display interface 132 on the screen. For example, the firmware 131 can be regarded as the display device 100 The firmware is preset, and the user can control the option settings of the on-screen display interface 132 displayed on the display device 100 through the five-way joystick 162 (or the physical button 161 ).

在另一实施例中,本发明的显示装置100并不限定于使用功能按键1631-1633才能进行操作画面回溯功能。使用者亦可通过输入接口160操作以开启与画面回溯功能有关的屏幕上显示界面132,并且可操作输入接口160中的实体按钮161或五向控制杆162以控制画面回溯功能的开启/关闭、以及画面回卷及画面往后等功能。In another embodiment, the display device 100 of the present invention is not limited to use the function buttons 1631-1633 to perform the operation screen recall function. The user can also operate through the input interface 160 to open the on-screen display interface 132 related to the screen recall function, and can operate the physical button 161 or the five-way joystick 162 in the input interface 160 to control the on/off of the screen recall function, And screen rollback and screen back and other functions.

在一些实施例中,显示控制器100以先进先出(first-in first-out)的机制以将影像信号11(或压缩影像信号)存储至影像缓冲器140中的第二存储空间142。举例来说,主机10或显示装置100可预先设定在影像缓冲器140的第二存储空间142的容量,其对应于可存储的输出影像的数量,意即上述数量可换算为画面回溯功能的影像信号的时间长度。In some embodiments, the display controller 100 stores the image signal 11 (or the compressed image signal) into the second storage space 142 of the image buffer 140 by a first-in first-out mechanism. For example, the host computer 10 or the display device 100 can pre-set the capacity of the second storage space 142 in the image buffer 140, which corresponds to the number of output images that can be stored, which means that the above-mentioned number can be converted into the frame recall function. The time length of the video signal.

详细而言,在一些实施例中,显示控制器100例如可将用于画面回溯功能的输出影像(例如为RGB影像)直接存储于第二存储空间142。当显示装置100的画面回溯功能被开启时,显示控制器100则可利用画面回溯功能的控制信号以直接从第二存储空间142取出欲播放的回溯时间点的回溯影像,并在显示模块120上播放该回溯影像。In detail, in some embodiments, for example, the display controller 100 can directly store the output image (for example, an RGB image) used for the frame recall function in the second storage space 142 . When the screen traceback function of the display device 100 is turned on, the display controller 100 can use the control signal of the screen traceback function to directly fetch the traceback image at the traceback time point to be played from the second storage space 142, and display it on the display module 120. Play the retrospective video.

在另一些实施例中,显示控制器100会先将用于画面回溯功能的影像信号11进行影像压缩(或视频压缩)以得到压缩影像,并将压缩影像存储至第二存储空间142。当显示装置100的画面回溯功能被开启时,显示控制器100则可利用画面回溯功能的控制信号以直接从第二存储空间142取出欲播放的回溯时间点对应的压缩影像,并对该压缩影像进行影像解压缩以得到欲在显示模块120上播放的回溯影像,并且在显示模块120上播放该回溯影像。In other embodiments, the display controller 100 first performs image compression (or video compression) on the image signal 11 used for the frame recall function to obtain a compressed image, and stores the compressed image in the second storage space 142 . When the screen backtracking function of the display device 100 is turned on, the display controller 100 can use the control signal of the screen backtracking function to directly fetch the compressed image corresponding to the backtracking time point to be played from the second storage space 142, and store the compressed image Image decompression is performed to obtain a retroactive image to be played on the display module 120 , and the retroactive image is played on the display module 120 .

需注意的是,无论显示控制器110是否对欲存储至第二存储空间142的影像信号进行影像压缩,显示控制器110均使用先进先出机制以将影像信号或压缩影像信号存储至第二存储空间142。换言之,当存储的影像信号或压缩影像信号的总容量已超过第二存储空间142的容量,显示控制器110会将在第二存储空间142中时间点最早的预定数量的影像信号或压缩影像信号删除,并且将最新时间点的影像信号或压缩影像信号写入至第二存储空间142。It should be noted that no matter whether the display controller 110 compresses the image signal to be stored in the second storage space 142 or not, the display controller 110 uses a first-in-first-out mechanism to store the image signal or the compressed image signal in the second storage space. Space 142. In other words, when the total capacity of stored video signals or compressed video signals exceeds the capacity of the second storage space 142, the display controller 110 will store the earliest predetermined number of video signals or compressed video signals in the second storage space 142 Delete, and write the video signal or the compressed video signal at the latest time point into the second storage space 142 .

当使用者在时间点T1通过功能按键1632或是利用屏幕上显示界面132以启动显示装置100的画面回溯功能时,表示显示控制器110在时间点T1开始会在显示模块120上播放回溯影像信号,故使用者暂时不需观看来自主机10的影像画面。此时,多工器170中的开关电路(未示出)会从输入接口160接收画面回溯功能的触发信号以断开路径172,意即显示控制器110在时间点T1不会再将来自主机10的影像信号11写入至第二存储空间142。若使用者在时间点T1启动显示装置100的画面回溯功能,则使用者仅能通过功能按键1631搜索在时间点T1之前的预定时间间隔内的回溯影像。当显示装置100处于画面回溯模式且使用者通过功能按键1633往后搜索回溯影像时,显示控制器110最多仅能往后搜索至时间点T1的回溯影像。When the user activates the frame lookback function of the display device 100 through the function button 1632 or the on-screen display interface 132 at the time point T1, it means that the display controller 110 will start playing the lookback image signal on the display module 120 at the time point T1. , so the user does not need to watch the image screen from the host 10 temporarily. At this time, the switch circuit (not shown) in the multiplexer 170 will receive the trigger signal of the screen recall function from the input interface 160 to disconnect the path 172, which means that the display controller 110 will no longer send the image from the host at time T1. The image signal 11 of 10 is written into the second storage space 142 . If the user activates the frame review function of the display device 100 at the time point T1 , the user can only search for the review images within a predetermined time interval before the time point T1 through the function button 1631 . When the display device 100 is in the frame backtracking mode and the user searches back through the function button 1633 for the backtracking image, the display controller 110 can only search back the backtracking image up to the time point T1 at most.

在一些实施例中,若显示装置100已处于画面回溯模式,每当使用者按下功能按键1631一次并放开,显示控制器110则会从目前的搜索时间点往前一预定秒数(例如5秒或10秒)以取得相应的搜索时间点的回溯影像,并且将目前的搜索时间点设定为上述回溯影像所对应的时间点。当使用者持续按住功能按键1631超过一预定秒数(例如2秒)后,显示控制器110会从目前的搜索时间点持续地快速往前搜索回溯影像。当使用者放开功能按键1631后,显示控制器110则停止往前搜索回溯影像。In some embodiments, if the display device 100 is already in the screen backtracking mode, whenever the user presses the function button 1631 once and releases it, the display controller 110 will go forward a predetermined number of seconds from the current search time point (for example 5 seconds or 10 seconds) to obtain the retrospective image at the corresponding search time point, and set the current search time point as the time point corresponding to the above retrospective image. When the user continues to hold down the function button 1631 for more than a predetermined number of seconds (for example, 2 seconds), the display controller 110 will continuously and rapidly search backtracking images from the current search time point. When the user releases the function button 1631 , the display controller 110 stops searching forward for the retrospective image.

类似地,每当使用者按下功能按键1633一次并放开,显示控制器110则会从目前的搜索时间点往后一预定秒数(例如5秒或10秒)以取得相应的搜索时间点的回溯影像,并且将目前的搜索时间点设定为上述回溯影像所对应的时间点。当使用者持续按住功能按键1633超过一预定秒数(例如2秒)后,显示控制器110会从目前的搜索时间点持续地快速往后搜索回溯影像。当使用者放开功能按键1633后,显示控制器110则停止往后搜索回溯影像。Similarly, whenever the user presses the function button 1633 once and releases it, the display controller 110 will go back a predetermined number of seconds (for example, 5 seconds or 10 seconds) from the current search time point to obtain the corresponding search time point The retrospective image of , and set the current search time point as the time point corresponding to the above retrospective image. When the user continues to hold down the function button 1633 for more than a predetermined number of seconds (for example, 2 seconds), the display controller 110 will continuously and rapidly search backward from the current search time point. When the user releases the function button 1633, the display controller 110 stops searching for the retrospective image.

图2A-2C为依据本发明一实施例中的回溯画面的示意图。请同时参考图1及图2A-2C。2A-2C are schematic diagrams of a backtracking screen according to an embodiment of the present invention. Please refer to FIG. 1 and FIGS. 2A-2C at the same time.

假定使用者在时间09:35(意即时间点T1)通过功能按键1632启动显示装置100的画面回溯功能,显示控制器110会先从第二存储空间142中取得在时间09:35的回溯影像202,并将回溯影像202在显示模块120上播放,其中回溯影像202包括时间列211以显示回溯影像202对应的时间点,且此时使用者20面向前方,如图2A所示。Assuming that the user activates the screen review function of the display device 100 through the function button 1632 at time 09:35 (that is, time point T1), the display controller 110 will first obtain the review image at time 09:35 from the second storage space 142 202 , and play the retrospective image 202 on the display module 120 , wherein the retrospective image 202 includes a time column 211 to display the time point corresponding to the retrospective image 202 , and the user 20 faces forward at this time, as shown in FIG. 2A .

假定显示装置110的第二存储空间142最多可存储10分钟长度的影像信号,当使用者通过功能按键1631以持续进行画面回溯时,显示控制器110最多可往前取得在时间09:35之前十分钟的回溯影像204。回溯影像204同样包括时间列211以显示回溯影像204对应的时间点,且此时使用者20面向左方,如图2B所示。Assuming that the second storage space 142 of the display device 110 can store video signals with a length of 10 minutes at most, when the user presses the function button 1631 to continuously perform screen review, the display controller 110 can obtain at most ten minutes before the time 09:35. Minute retrospective images 204 . The lookback image 204 also includes a time column 211 to display the time point corresponding to the lookback image 204 , and the user 20 is facing left at this moment, as shown in FIG. 2B .

接着,当使用者通过功能按键1633以往后进行画面搜索时,显示控制器110最多可往后搜索至时间09:35的回溯影像。若使用者通过功能按键1633以往后观看在时间09:31的回溯影像206,回溯影像206同样包括时间列211以显示回溯影像206对应的时间点,且此时使用者20面向后方,如图2C所示。Next, when the user searches through the function button 1633 to search the screen in the future, the display controller 110 can search back to the retrospective image at the time of 09:35 at most. If the user uses the function button 1633 to watch the retrospective image 206 at time 09:31, the retrospective image 206 also includes a time column 211 to display the corresponding time point of the retrospective image 206, and at this time the user 20 faces backward, as shown in FIG. 2C shown.

需注意的是,当使用者通过功能按键1631或1633以往前搜索或往后搜索画面时,仍然有时间上的限制。详细而言,往前搜索最多仅能搜索在时间点T1之前的预定时间间隔(例如10分钟)内的回溯影像。往后搜索最多仅能从时间点T1的预定时间间隔前的最早时间点(意即时间点T1前十分钟)往后搜索至时间点T1的回溯影像。It should be noted that when the user searches forward or backward through the function buttons 1631 or 1633 , there is still a time limit. In detail, the forward search can only search backtracking images within a predetermined time interval (for example, 10 minutes) before the time point T1 at most. The backward search can only search back to the retrospective image at the time point T1 from the earliest time point (ie ten minutes before the time point T1 ) before the predetermined time interval of the time point T1 at most.

图3为依据本发明一实施例中的显示装置的画面回溯方法的流程图。请同时参考图1及图3。FIG. 3 is a flow chart of a frame backtracking method of a display device according to an embodiment of the invention. Please refer to Figure 1 and Figure 3 at the same time.

在步骤S310,显示控制器110从主机10接收影像信号11,并将影像信号11存储至影像缓冲器140。举例来说,在一些实施例中,显示控制器100例如可将用于画面回溯功能的输出影像(例如为RGB影像)直接存储于第二存储空间142。当显示装置100的画面回溯功能被开启时,显示控制器100则可利用画面回溯功能的控制信号以直接从第二存储空间142取出欲播放的回溯时间点的回溯影像信号,并在显示模块120上播放该回溯影像信号。In step S310 , the display controller 110 receives the image signal 11 from the host 10 and stores the image signal 11 into the image buffer 140 . For example, in some embodiments, the display controller 100 can directly store the output image (for example, RGB image) used for the frame recall function in the second storage space 142 . When the frame traceback function of the display device 100 is turned on, the display controller 100 can use the control signal of the frame traceback function to directly fetch the traceback image signal at the traceback time point to be played from the second storage space 142, and display it on the display module 120. Play the retrospective video signal on the computer.

在另一些实施例中,显示控制器100会先将用于画面回溯功能的影像信号11进行影像压缩(或视频压缩)以得到压缩影像,并将压缩影像存储至第二存储空间142。当显示装置100的画面回溯功能被开启时,显示控制器100则可利用画面回溯功能的控制信号以直接从第二存储空间142取出欲播放的回溯时间点对应的压缩影像,并对该压缩影像进行影像解压缩以得到欲在显示模块120上播放的回溯影像,并且在显示模块120上播放该回溯影像。In other embodiments, the display controller 100 first performs image compression (or video compression) on the image signal 11 used for the frame recall function to obtain a compressed image, and stores the compressed image in the second storage space 142 . When the screen backtracking function of the display device 100 is turned on, the display controller 100 can use the control signal of the screen backtracking function to directly fetch the compressed image corresponding to the backtracking time point to be played from the second storage space 142, and store the compressed image Image decompression is performed to obtain a retroactive image to be played on the display module 120 , and the retroactive image is played on the display module 120 .

在步骤S312,判断是否接收到触发信号。当判断接收到触发信号,则执行步骤S314。当判断未接收到触发信号,则回到步骤S312。举例来说,在输入接口160的功能按键1632用以开启或关闭显示装置100的画面回溯功能,意即当使用者按下功能按键1632并放开时,功能按键1632可产生一触发信号以传送至多工器170及显示控制器110。In step S312, it is determined whether a trigger signal is received. When it is judged that the trigger signal is received, step S314 is executed. When it is judged that the trigger signal is not received, return to step S312. For example, the function button 1632 on the input interface 160 is used to enable or disable the screen recall function of the display device 100, that is, when the user presses the function button 1632 and releases it, the function button 1632 can generate a trigger signal to transmit to the multiplexer 170 and the display controller 110 .

在步骤S314,显示装置100进入画面回溯模式。举例来说,因应于接收到该触发信号(例如在时间点T1),显示控制器110控制显示装置100进入画面回溯模式,且多工器170的开关电路172会断开路径,意即显示控制器110在时间点T1不会再将来自主机10的影像信号11写入至第二存储空间142。若使用者在时间点T1启动显示装置100的画面回溯功能,则使用者仅能通过功能按键1631搜索在时间点T1之前的预定时间间隔内的回溯影像。当显示装置100处于画面回溯模式且使用者通过功能按键1633往后搜索回溯影像时,显示控制器110最多仅能往后搜索至时间点T1的回溯影像。In step S314, the display device 100 enters into a screen retracing mode. For example, in response to receiving the trigger signal (for example, at time point T1), the display controller 110 controls the display device 100 to enter the frame recall mode, and the switch circuit 172 of the multiplexer 170 will disconnect the path, which means that the display control The device 110 will no longer write the image signal 11 from the host 10 into the second storage space 142 at the time point T1. If the user activates the frame review function of the display device 100 at the time point T1 , the user can only search for the review images within a predetermined time interval before the time point T1 through the function button 1631 . When the display device 100 is in the frame backtracking mode and the user searches back through the function button 1633 for the backtracking image, the display controller 110 can only search back the backtracking image up to the time point T1 at most.

在步骤S316,显示控制器111依据使用者指令以从影像缓冲器取出相应时间的影像信号。举例来说,当显示装置100已处于画面回溯模式,使用者例如可通过功能按键1631或1633、或是通过输入接口160操作以开启与画面回溯功能有关的屏幕上显示界面132,并且可操作输入接口160中的实体按钮161或五向控制杆162以控制画面回溯功能的开启/关闭、以及画面回卷及画面往后等功能。在一些实施例中,当显示装置100的画面回溯功能被开启时,显示控制器100则可利用画面回溯功能的控制信号以直接从第二存储空间142取出欲播放的回溯时间点的回溯影像,并在显示模块120上播放该回溯影像。在另一些实施例中,当显示装置100的画面回溯功能被开启时,显示控制器100则可利用画面回溯功能的控制信号以直接从第二存储空间142取出欲播放的回溯时间点对应的压缩影像,并对该压缩影像进行影像解压缩以得到欲在显示模块120上播放的回溯影像,并且在显示模块120上播放该回溯影像。In step S316, the display controller 111 retrieves the video signal corresponding to the time from the video buffer according to the user instruction. For example, when the display device 100 is in the screen recall mode, the user can open the on-screen display interface 132 related to the screen recall function by operating the function buttons 1631 or 1633, or through the input interface 160, and can operate input The physical button 161 or the five-way joystick 162 in the interface 160 is used to control the on/off of the screen recall function, and functions such as screen rollback and screen backward. In some embodiments, when the frame traceback function of the display device 100 is enabled, the display controller 100 can use the control signal of the frame traceback function to directly fetch the traceback image at the traceback time point to be played from the second storage space 142 , And play the retrospective image on the display module 120 . In some other embodiments, when the frame traceback function of the display device 100 is enabled, the display controller 100 can use the control signal of the frame traceback function to directly retrieve the compressed file corresponding to the traceback time point to be played from the second storage space 142. image, and image decompression is performed on the compressed image to obtain a retrospective image to be played on the display module 120 , and the retrospective image is played on the display module 120 .

在步骤S318,判断是否接收到触发信号。当判断接收到触发信号,则执行步骤S320。当判断未接收到触发信号,则回到步骤S316。举例来说,上述触发信号用以切换显示装置100的一般画面模式或画面回溯模式。当显示装置100已处于画面回溯模式时,若显示控制器110判断再度接收到该触发信号,显示控制器110即控制显示装置100进入一般画面模式。In step S318, it is determined whether a trigger signal is received. When it is determined that a trigger signal is received, step S320 is performed. When it is judged that the trigger signal is not received, return to step S316. For example, the above-mentioned trigger signal is used to switch the normal picture mode or the picture traceback mode of the display device 100 . When the display device 100 is already in the frame recall mode, if the display controller 110 determines that the trigger signal is received again, the display controller 110 controls the display device 100 to enter the normal frame mode.

在步骤S320,显示装置100进入一般画面模式。举例来说,第一存储空间140例如做为一般画面模式下的输出影像缓冲器。意即,在一般画面模式下,显示控制器110会从第一存储空间141取得输出影像,并将上述输出影像在显示模块120上播放。In step S320, the display device 100 enters a normal screen mode. For example, the first storage space 140 is used as an output image buffer in normal frame mode. That is, in the normal image mode, the display controller 110 will obtain the output image from the first storage space 141 and play the output image on the display module 120 .

综上所述,本发明提供一种显示装置及其画面回溯方法,且使用者可利用显示装置内建的画面回溯功能以浏览在一预定时间间隔内的屏幕画面,进而帮助使用者回忆在主机上先前执行的操作或是浏览使用者先前观赏过的画面,进而增加使用者体验。To sum up, the present invention provides a display device and its screen recall method, and the user can use the built-in screen recall function of the display device to browse the screen images within a predetermined time interval, thereby helping the user recall Users can browse the previously performed operations or browse the screens that the user has watched before, thereby enhancing the user experience.

在权利要求中使用如“第一”、“第二”、“第三”等词是用来修饰权利要求中的元件,并非用来表示之间具有优先权顺序,先行关系,或者是一个元件先于另一个元件,或者是执行方法步骤时的时间先后顺序,仅用来区别具有相同名字的元件。Words such as "first", "second", and "third" used in the claims are used to modify the elements in the claims, and are not used to indicate that there is an order of priority, an antecedent relationship, or an element An element preceding another element, or a chronological order in performing method steps, is only used to distinguish elements with the same name.

本发明虽以较佳实施例公开如上,然其并非用以限定本发明的范围,任何所属技术领域中技术人员,在不脱离本发明的构思和范围内,当可做些许的变动与润饰,因此本发明的保护范围当视权利要求所界定者为准。Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the scope of the present invention. Any person skilled in the art may make some changes and modifications without departing from the concept and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.

Claims (16)

1.一种显示装置,包括:1. A display device, comprising: 一影像缓冲器;an image buffer; 一显示模块;以及a display module; and 一显示控制器,用以从一主机接收一影像信号,并将该影像信号存储于该影像缓冲器;a display controller, used for receiving an image signal from a host, and storing the image signal in the image buffer; 其中因应于该显示控制器接收到一触发信号,该显示控制器控制该显示装置进入一画面回溯模式,Wherein, in response to the display controller receiving a trigger signal, the display controller controls the display device to enter a frame backtracking mode, 其中该显示控制器依据一使用者指令以从该影像缓冲器取出相应于回溯时间点的回溯影像,并将该回溯影像在该显示模块上播放。Wherein the display controller fetches the traceback image corresponding to the traceback time point from the image buffer according to a user instruction, and plays the traceback image on the display module. 2.如权利要求1所述的显示装置,其中该显示控制器先压缩该影像信号以得到压缩影像信号,并将该压缩影像信号存储至该影像缓冲器,2. The display device as claimed in claim 1, wherein the display controller first compresses the image signal to obtain a compressed image signal, and stores the compressed image signal into the image buffer, 其中当该显示装置处于该画面回溯模式,该显示控制器从该影像缓冲器取得相应于该回溯时间点的该压缩影像信号,并对该压缩影像信号进行解压缩以得到该回溯影像。Wherein when the display device is in the frame backtracking mode, the display controller obtains the compressed video signal corresponding to the backtracking time point from the image buffer, and decompresses the compressed video signal to obtain the backtracking image. 3.如权利要求2所述的显示装置,其中该影像缓冲器存储一预定时间间隔内的该压缩影像信号,且该显示控制器使用一先进先出机制以将该压缩影像信号存储至该影像缓冲器。3. The display device as claimed in claim 2, wherein the image buffer stores the compressed image signal for a predetermined time interval, and the display controller uses a first-in-first-out mechanism to store the compressed image signal into the image buffer. 4.如权利要求1所述的显示装置,还包括:一输入界面,其中该输入界面包括一第一功能按键、一第二功能按键及一第三功能按键,其中该第二功能按键用以产生该触发信号以开启或关闭该显示装置的该画面回溯模式,该第一功能按键及该第三功能按键用以产生该使用者指令,并分别控制在该画面回溯模式中的画面回卷功能及画面往后功能。4. The display device according to claim 1, further comprising: an input interface, wherein the input interface includes a first function key, a second function key and a third function key, wherein the second function key is used for Generating the trigger signal to turn on or off the screen scrolling mode of the display device, the first function key and the third function key are used to generate the user instruction, and respectively control the screen scrolling function in the screen scrolling mode And screen back function. 5.如权利要求4所述的显示装置,其中当该显示装置处于该画面回溯模式且一使用者按下该第一功能按键或该第三功能按键并放开时,该显示控制器从目前的搜索时间点往前或往后一预定秒数以得到该回溯时间点,并且从该影像缓冲器取得该回溯时间点相应的该回溯影像。5. The display device as claimed in claim 4, wherein when the display device is in the screen recall mode and a user presses the first function button or the third function button and releases it, the display controller starts from the current The search time point is moved forward or backward by a predetermined number of seconds to obtain the traceback time point, and the traceback image corresponding to the traceback time point is obtained from the image buffer. 6.如权利要求4所述的显示装置,其中当该显示装置处于该画面回溯模式且一使用者持续按住该第一功能按键或该第三功能按键时,该显示控制器从目前的搜索时间点快速往前或往后搜索该回溯影像。6. The display device as claimed in claim 4, wherein when the display device is in the screen recall mode and a user keeps pressing the first function button or the third function button, the display controller will start from the current search Search the lookback image quickly forward or backward in time. 7.如权利要求4所述的显示装置,其中当该显示装置处于该画面回溯模式且该显示控制器从该第二功能按键接收到该触发信号,该显示控制器控制该显示装置回到一般画面模式。7. The display device as claimed in claim 4, wherein when the display device is in the screen recall mode and the display controller receives the trigger signal from the second function key, the display controller controls the display device to return to normal picture mode. 8.如权利要求1所述的显示装置,其中因应于该显示装置进入该画面回溯模式,该显示控制器停止写入该影像信号至该影像缓冲器。8. The display device of claim 1, wherein the display controller stops writing the image signal into the image buffer in response to the display device entering the frame look-back mode. 9.一种显示装置的画面回溯方法,其中该显示装置包括一影像缓冲器、一显示模块及一显示控制器,该方法包括:9. A frame backtracking method for a display device, wherein the display device includes an image buffer, a display module and a display controller, the method comprising: 利用该显示控制器从一主机接收一影像信号,并将该影像信号存储于该影像缓冲器;receiving an image signal from a host by using the display controller, and storing the image signal in the image buffer; 因应于该显示控制器接收到一触发信号,利用该显示控制器控制该显示装置进入一画面回溯模式;以及In response to the display controller receiving a trigger signal, using the display controller to control the display device to enter a frame retrace mode; and 利用该显示控制器依据一使用者指令以从该影像缓冲器取出相应于回溯时间点的回溯影像,并将该回溯影像在该显示模块上播放。The display controller is used to fetch the traceback image corresponding to the traceback time point from the image buffer according to a user instruction, and play the traceback image on the display module. 10.如权利要求9所述的显示装置的画面回溯方法,还包括:10. The screen backtracking method of a display device according to claim 9, further comprising: 利用该显示控制器先压缩该影像信号以得到压缩影像信号,并将该压缩影像信号存储至该影像缓冲器;using the display controller to first compress the video signal to obtain a compressed video signal, and store the compressed video signal into the video buffer; 当该显示装置处于该画面回溯模式,利用该显示控制器从该影像缓冲器取得相应于该回溯时间点的该压缩影像信号,并对该压缩影像信号进行解压缩以得到该回溯影像。When the display device is in the frame retrospective mode, the display controller is used to obtain the compressed image signal corresponding to the retrospective time point from the image buffer, and decompress the compressed video signal to obtain the retrospective image. 11.如权利要求9所述的显示装置的画面回溯方法,其中该影像缓冲器存储一预定时间间隔内的该压缩影像信号,且该方法还包括:利用该显示控制器使用一先进先出机制以将该压缩影像信号存储至该影像缓冲器。11. The frame backtracking method of a display device as claimed in claim 9, wherein the image buffer stores the compressed image signal within a predetermined time interval, and the method further comprises: utilizing a first-in-first-out mechanism by the display controller to store the compressed image signal into the image buffer. 12.如权利要求9所述的显示装置的画面回溯方法,其中该显示装置还包括:一输入界面,其中该输入界面包括一第一功能按键、一第二功能按键及一第三功能按键,其中该第二功能按键用以产生该触发信号以开启或关闭该显示装置的该画面回溯模式,该第一功能按键及该第三功能按键用以产生该使用者指令,并分别控制在该画面回溯模式中的画面回卷功能及画面往后功能。12. The method for recalling images of a display device according to claim 9, wherein the display device further comprises: an input interface, wherein the input interface includes a first function key, a second function key and a third function key, Wherein the second function button is used to generate the trigger signal to turn on or off the screen recall mode of the display device, the first function button and the third function button are used to generate the user instruction, and respectively control the screen The screen rollback function and the screen backward function in the retrace mode. 13.如权利要求12所述的显示装置的画面回溯方法,还包括:13. The screen traceback method of a display device according to claim 12, further comprising: 当该显示装置处于该画面回溯模式且一使用者按下该第一功能按键或该第三功能按键并放开时,利用该显示控制器从目前的搜索时间点往前或往后一预定秒数以得到该回溯时间点,并且从该影像缓冲器取得该回溯时间点相应的该回溯影像。When the display device is in the screen backtracking mode and a user presses the first function button or the third function button and releases it, the display controller is used to move forward or backward a predetermined second from the current search time point to obtain the traceback time point, and obtain the traceback image corresponding to the traceback time point from the image buffer. 14.如权利要求12所述的显示装置的画面回溯方法,还包括:14. The screen backtracking method of a display device according to claim 12, further comprising: 当该显示装置处于该画面回溯模式且一使用者持续按住该第一功能按键或该第三功能按键时,利用该显示控制器从目前的搜索时间点快速往前或往后搜索该回溯影像。When the display device is in the frame review mode and a user keeps pressing the first function button or the third function button, the display controller is used to quickly search forward or backward from the current search time point for the review image . 15.如权利要求12所述的显示装置的画面回溯方法,还包括:15. The screen backtracking method of a display device according to claim 12, further comprising: 当该显示装置处于该画面回溯模式且该显示控制器从该第二功能按键接收到该触发信号,利用该显示控制器控制该显示装置回到一般画面模式。When the display device is in the frame recall mode and the display controller receives the trigger signal from the second function key, the display controller is used to control the display device to return to the normal frame mode. 16.如权利要求9所述的显示装置的画面回溯方法,还包括:16. The screen backtracking method of a display device according to claim 9, further comprising: 因应于该显示装置进入该画面回溯模式,利用该显示控制器停止写入该影像信号至该影像缓冲器。In response to the display device entering the frame look-back mode, the display controller stops writing the image signal into the image buffer.
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