WO2024036862A1 - 液晶显示设备的防窥控制方法及液晶显示设备 - Google Patents

液晶显示设备的防窥控制方法及液晶显示设备 Download PDF

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Publication number
WO2024036862A1
WO2024036862A1 PCT/CN2022/142111 CN2022142111W WO2024036862A1 WO 2024036862 A1 WO2024036862 A1 WO 2024036862A1 CN 2022142111 W CN2022142111 W CN 2022142111W WO 2024036862 A1 WO2024036862 A1 WO 2024036862A1
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Prior art keywords
liquid crystal
display device
crystal display
state
signal
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PCT/CN2022/142111
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English (en)
French (fr)
Inventor
万业
康报虹
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惠科股份有限公司
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Publication of WO2024036862A1 publication Critical patent/WO2024036862A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/1323—Arrangements for providing a switchable viewing angle
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present application relates to the field of liquid crystal displays, and in particular, to a privacy control method for a liquid crystal display device and a liquid crystal display device.
  • the entire display panel of the liquid crystal display is processed, that is, the entire display panel is controlled to switch to a fully anti-privacy state or a non-privacy state based on demand.
  • the user's state switching requirements are met. needs, but the switching of the entire display panel into a fully privacy-protected state or a non-privacy-protected state makes the user less flexible, and the display panel in the fully privacy-protected state has high power consumption, which cannot meet the user's targeted needs. Privacy requirements.
  • the main purpose of this application is to provide an anti-peep control method for a liquid crystal display device and a liquid crystal display device, aiming to solve the problems of low flexibility and low flexibility of the current anti-peep technology because it can only switch the anti-peep state of the entire display panel.
  • Technical issues such as high power consumption and inability to meet users' targeted anti-peep needs.
  • the privacy protection control method for a liquid crystal display device includes the following steps;
  • the screen display signal includes a brightness signal and a privacy signal
  • the first switching timing and the electronically controlled liquid crystal film of the backlight operating state of the lamp panel in the liquid crystal display device are controlled according to the brightness signal.
  • the second switching timing of the working state of the diaphragm is adapted to realize partial anti-peep display of the liquid crystal display device.
  • This application also provides a liquid crystal display device, which includes:
  • a digital system unit configured to receive and detect screen display signals required by the liquid crystal display device, where the screen display signals include a brightness signal and a privacy signal;
  • a logic control unit configured to control the backlight operation of the light panel in the liquid crystal display device according to the partial anti-peep information and the brightness signal if it is detected that the anti-peep signal in the screen display signal is local anti-peep information.
  • the first switching timing of the state is adapted to the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm, so as to realize partial anti-peep display of the liquid crystal display device.
  • This application uses a digital system unit to receive and detect the screen display signals required to display the screen of the liquid crystal display device.
  • the backlight working status of multiple target backlight partitions in the light panel is detected.
  • the first switching timing is adapted to the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm, so that the collimated light emitted by the backlight partition at the first switching timing passes through the privacy film and is at the second switching timing. After the electronically controlled liquid crystal diaphragm is placed on the electronically controlled liquid crystal diaphragm, the emitted light still remains on the collimated light.
  • the target backlight partition at this time is The backlight working state is switched to the first switching time of the lighting state, so that the light emitted after the lamp beads of the target backlight partition are lit passes through the privacy film and the electronically controlled liquid crystal diaphragm in the transparent state, and remains in collimation. status, so that only the user facing the display panel can see the light source, that is, only the user in the center can see the information content on the display panel, achieving the effect of partial anti-peep display and providing users with personalized needs for partial anti-peep. , while enhancing the flexibility of anti-peep technology, it also avoids high power consumption in the full anti-peep state.
  • Figure 1 is a schematic diagram of the terminal structure of the hardware operating environment involved in the embodiment of the present application.
  • Figure 2 is a schematic flow chart of an embodiment of an anti-peep control method for a liquid crystal display device of the present application
  • Figure 3 is a schematic diagram of the scene that users at different positions can see when the target backlight partition is dynamically changed
  • Figure 4 is a schematic diagram of the subsequent steps of step S10 in the anti-peep control method of the liquid crystal display device of the present application;
  • Figure 5 is a schematic structural diagram of the liquid crystal display device of the present application.
  • Figure 6 is a schematic diagram of the collimation state of the incident light emitted by the lamp panel when it is in the lit state and passes through the display panel;
  • FIG. 7 is a schematic diagram of the scattering state of incident light emitted by the lamp panel through the display panel when the lamp panel is in a lit state.
  • the main solution of the embodiment of this application is to receive and detect the screen display signal required by the liquid crystal display device, and when the local anti-peep information is detected, control the backlight working state of the backlight partition according to the brightness signal in the local anti-peep information.
  • the first switching timing is adapted to the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm, thereby realizing partial anti-peep display of the liquid crystal display device.
  • the entire display panel of the liquid crystal display is processed, that is, the entire display panel is controlled to switch to a fully privacy-protected state or a non-privacy-protected state based on the needs, and there is flexibility at the user's disposal.
  • the problem is relatively low, and the display panel in the fully anti-peep state has high power consumption and cannot meet the targeted anti-peep needs of users.
  • This application provides a solution that uses a digital system unit to receive and detect the picture display signals required for the display of the liquid crystal display device, based on the first switching timing of the backlight working state of multiple backlight partitions in the lamp panel and the above-mentioned
  • the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm is adapted by controlling the local privacy information and the brightness signal when detecting that the privacy signal in the received screen display signal is local privacy information.
  • the backlight working state of each backlight partition in the lamp panel is adapted to the diaphragm working state of the electronically controlled liquid crystal diaphragm, so that the collimated light emitted by the backlight partition at the first switching opportunity passes through the privacy film and is at the second switching opportunity.
  • the electronically controlled liquid crystal diaphragm After the electronically controlled liquid crystal diaphragm is placed on the display panel, the emitted light still remains in the collimated light, thereby achieving partial privacy protection of the display panel, which not only improves the flexibility at the disposal, but also meets the user's targeted partial privacy protection needs while avoiding Comprehensive privacy protection against high power consumption situations.
  • Figure 1 is a schematic diagram of the terminal structure of the hardware operating environment involved in the embodiment of the present application.
  • the application carrier of the anti-peep control method of the liquid crystal display device in the embodiment of the present application is a liquid crystal display device.
  • the liquid crystal display device may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, and a memory 1005.
  • the communication bus 1002 is used to realize connection communication between these components.
  • the user interface 1003 may include a display area (Display) and an input unit such as a keyboard (Keyboard).
  • the optional user interface 1003 may also include a standard wired interface and a wireless interface.
  • the network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).
  • the memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory.
  • the memory 1005 may optionally be a storage device independent of the aforementioned processor 1001.
  • the liquid crystal display device may also include a camera, RF (Radio Frequency, radio frequency) circuits, sensors, audio circuits, WiFi modules, etc.
  • sensors such as light sensors, motion sensors and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor.
  • the ambient light sensor may adjust the brightness of the display screen according to the brightness of the ambient light.
  • the proximity sensor may turn off the display screen and/or when the mobile terminal moves to the ear. Backlight.
  • the gravity acceleration sensor can detect the magnitude of acceleration in various directions (usually three axes).
  • the mobile terminal can detect the magnitude and direction of gravity when stationary, and can be used to identify applications such as mobile terminal posture (such as horizontal and vertical screen switching, Related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; of course, the mobile terminal can also be equipped with other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, etc., here No longer.
  • mobile terminal posture such as horizontal and vertical screen switching, Related games, magnetometer attitude calibration
  • vibration recognition related functions such as pedometer, tapping
  • the mobile terminal can also be equipped with other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, etc., here No longer.
  • the structure of the liquid crystal display device shown in FIG. 1 does not constitute a limitation on the liquid crystal display device, and may include more or less components than shown in the figure, or combine certain components, or different components. layout.
  • memory 1005 which is a computer storage medium, may include an operating system, a network communication module, a user interface module and a computer processing program.
  • the network interface 1004 is mainly used to connect to the backend server and communicate with the backend server;
  • the user interface 1003 is mainly used to connect to the client (user end) and communicate with the client;
  • the processor 1001 may be used to invoke a computer processing program stored in memory 1005 and perform the following operations:
  • the screen display signal includes a brightness signal and a privacy signal
  • the first switching timing and the electronically controlled liquid crystal film of the backlight operating state of the lamp panel in the liquid crystal display device are controlled according to the brightness signal.
  • the second switching timing of the working state of the diaphragm is adapted to realize partial anti-peep display of the liquid crystal display device.
  • processor 1001 can call the computer processing program stored in the memory 1005 and also perform the following operations:
  • the step of controlling the first switching timing of the backlight working state of the lamp panel in the liquid crystal display device to match the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm according to the brightness signal includes the following steps:
  • the anti-peep screen position signal in the partial anti-peep information divides the light panel into target backlight partitions and other backlight partitions, and at the same time, the electronically controlled liquid crystal diaphragm is divided according to the diaphragm working signal in the partial anti-peep information. The working status of the diaphragm is controlled.
  • processor 1001 can call the computer processing program stored in the memory 1005 and also perform the following operations:
  • the backlight operating state of the target backlight partition is controlled according to the brightness signal to be the first switching opportunity of being in the lighted state.
  • the first switching opportunity is to control the backlight working state of the other backlight partitions to be in the extinguished state.
  • processor 1001 can call the computer processing program stored in the memory 1005 and also perform the following operations:
  • the backlight working state of the target backlight partition is controlled according to the brightness signal to be the first switching timing and control in the extinguished state.
  • the backlight working state of the other backlight partitions is the first switching opportunity of the lighting state.
  • processor 1001 can call the computer processing program stored in the memory 1005 and also perform the following operations:
  • the electronically controlled liquid crystal is configured according to the comprehensive privacy protection information.
  • the second switching timing of the diaphragm working state of the diaphragm is controlled to be in the transparent state, and the backlight working state of the lamp panel is controlled to be the first switching timing of the lighting state according to the brightness signal.
  • processor 1001 can call the computer processing program stored in the memory 1005 and also perform the following operations:
  • the electronically controlled liquid crystal After the step of receiving and detecting the screen display signal required by the liquid crystal display device, if it is detected that the anti-peep signal in the screen display signal is fully visible information, the electronically controlled liquid crystal will The second switching timing of the diaphragm working state of the diaphragm is controlled in the turbid state, and the backlight working state of the lamp panel is controlled to be the first switching timing in the lighting state according to the brightness signal.
  • processor 1001 can call the computer processing program stored in the memory 1005 and also perform the following operations:
  • the screen display signal also includes the adaptation signal
  • the adaptation signal is used to drive the liquid crystal molecules in the display panel of the liquid crystal display device, and a corresponding picture is displayed on the display panel according to the brightness signal and the privacy signal.
  • one embodiment of the present application provides a privacy control method for a liquid crystal display device.
  • the privacy control method for a liquid crystal display device includes the following steps;
  • Step S10 receive and detect the screen display signal required by the liquid crystal display device, where the screen display signal includes a brightness signal and a privacy signal;
  • the digital system unit inside the liquid crystal display device will receive the image display signal required to process the display image.
  • the image display signal required in this embodiment includes brightness. signal, anti-peep signal and adaptation signal, specifically other signals, which are not limited in this embodiment.
  • the digital system unit After the digital system unit receives the screen display signal, it will perform allocation processing according to different signal types in the screen display signal.
  • the anti-peep signal is the main body. After receiving the anti-peep signal, the digital system unit performs the anti-peep signal. The information contained in the signal is detected, and different logical controls are performed on the MiniLED light panel based on the different information contained in the anti-peep signal combined with the brightness signal.
  • the MiniLED light panel mentioned in this embodiment is equivalent to the light in Figure 5 plate.
  • Step S20 If it is detected that the privacy signal in the screen display signal is local privacy information, the first switching timing and power supply of the backlight operating state of the lamp panel in the liquid crystal display device are controlled according to the brightness signal.
  • the second switching timing of the diaphragm working state of the liquid crystal diaphragm is controlled to be adapted to realize partial anti-peep display of the liquid crystal display device.
  • the digital system unit detects the privacy protection signal and obtains partial privacy protection information, it means that the user at this time has a need for partial privacy protection of the display panel. Based on the partial privacy protection information, the digital system unit The working state of the electronically controlled liquid crystal diaphragm is controlled to switch back and forth between the transparent state and the turbid state, that is, the electronically controlled liquid crystal diaphragm is controlled to switch between the transparent state and the turbid state at a frequency greater than or equal to 20Hz.
  • the MiniLED light panel is controlled to light up, and when the electronically controlled liquid crystal diaphragm is in a turbid state, the MiniLED light panel is controlled to extinguish, which can avoid the scattering of incident light in the liquid crystal display device. It ensures that the light is projected on the display panel in a collimated state to display the corresponding picture, thereby making the display panel enter a privacy-proof state.
  • the electronically controlled liquid crystal diaphragm is controlled. The working state of the diaphragm switches back and forth between the transparent state and the turbid state.
  • the backlight partition corresponding to the position signal of the anti-peep screen marked that is, the target backlight partition.
  • the backlight corresponding to the position signal of the anti-peep screen is not marked.
  • Partitioning, that is, other backlight partitions perform non-peep protection operations so that the first switching timing of the backlight working state of the target backlight partition matches the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm, thereby realizing the same display panel Partial privacy protection effect.
  • step S20 the first switching timing of controlling the backlight working state of the lamp panel in the liquid crystal display device according to the brightness signal coincides with the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm.
  • the adaptation steps it also includes:
  • Step S21 divide the light panel into target backlight partitions and other backlight partitions according to the privacy screen position signal in the partial privacy protection information, and at the same time divide the lamp panel into target backlight partitions and other backlight partitions according to the diaphragm working signal in the partial privacy protection information.
  • the working state of the diaphragm is controlled by an electronically controlled liquid crystal diaphragm.
  • the MiniLED light panel is divided into target backlight partitions and other backlight partitions based on the privacy screen position signal in the local privacy information.
  • the left half of the display panel controlled by the user through the operating device is the area that needs to be protected from privacy
  • the right half is the area that needs to be protected from privacy.
  • the backlight partition corresponding to the left half of the display panel is divided into the target backlight partition based on the privacy screen position signal generated by this operation, and the backlight partition corresponding to the right half is divided into other backlight partitions.
  • the logic control unit in the liquid crystal display device controls the electronically controlled liquid crystal diaphragm to switch back and forth between the transparent state and the turbid state.
  • the target backlight partition can be dynamically changed.
  • the user controls the display panel through the operating device to display a as the area that needs to be protected from privacy, and then adjusts the position of a from left to right.
  • Movement operation 110 and 111 represent the position of a before moving, 112 represents the current position of a, so the dynamic movement position of a in the display panel of Figure 3 is from 110 ⁇ 111 ⁇ 112), then based on the position of a
  • the moving trajectory updates the privacy screen position information, and then updates the target backlight partition corresponding to the privacy screen position information, so that the area on the display panel that needs to be protected from privacy can dynamically change based on changes in the display position of the information content.
  • the visual frame i.e.
  • the user i.e., the user in the center
  • the user shows that no matter where a is located on the display panel, 1 the user can clearly see a on the display panel.
  • the user i.e., the user in the center
  • the visual frame i.e. 117
  • the user can only view other information content other than a.
  • the user can only see a black shadow, specifically 113 and 114 represents the position of a in the eyes of 2 the user before moving, and 115 is the current position of a in the eyes of the user 2.
  • the dynamic moving position of a in the eyes of the user 2 is 113 ⁇ 114 ⁇ 115, further enhancing the anti-peep technology. It provides flexibility and convenience to avoid the need for users to re-operate and set up when the areas that need to be protected from privacy change.
  • step S20 the backlight working state and the first switching timing of the light panel in the liquid crystal display device are controlled according to the brightness signal and the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm.
  • Adaptation steps include:
  • Step S22 When the diaphragm working state of the electronically controlled liquid crystal diaphragm is the second switching timing of the transparent state, control the backlight working state of the target backlight partition to the first lighting state according to the brightness signal.
  • the switching timing and the backlight operating state of the other backlight partitions are controlled to be the first switching timing in the off state.
  • Step S23 when the diaphragm working state of the electronically controlled liquid crystal diaphragm is the second switching opportunity of the turbid state, control the backlight working state of the target backlight partition to the first switching of the extinguished state according to the brightness signal
  • the timing and control of the backlight working state of the other backlight partitions are the first switching timing of the lighting state.
  • the logic control unit switches the backlight working state of the target backlight partition to the lighting state according to the brightness signal at this time, and switches the backlight working state of other backlight partitions
  • the state switches to the off state or the on state (in order to achieve a high-contrast picture effect, the backlight working status of other backlight partitions is not affected by the diaphragm working status of the electronically controlled liquid crystal diaphragm and privacy information); if this When the diaphragm working state of the electronically controlled liquid crystal diaphragm switches to the turbid state, the logic control unit switches the backlight working state of the target backlight partition to the extinguished state according to the brightness signal at this time, and switches the backlight working state of other backlight partitions to In the lit state, the user in the center can observe the content on the entire display panel, while the user in the non-center can only observe the content on the display panel corresponding to other back
  • the brightness adjustment of the target backlight partition and other backlight partitions according to the brightness signal can be done by DC (level) dimming or PWM (Pulse Width Modulation, pulse width modulation) dimming. If It is PWM dimming.
  • the adjustment frequency of the lamp beads in the target backlight partition and other backlight partitions is an integer multiple of the frequency of the electronically controlled liquid crystal diaphragm. For example, when the frequency of the electronically controlled liquid crystal diaphragm is 20Hz, the target backlight The frequency of partitions and other backlight partitions can be 40Hz, 60Hz, 80Hz, etc., and so on in integer multiples.
  • the screen display signal in step S10 also includes an adaptation signal
  • step S11 the adaptation signal is used to drive the liquid crystal molecules in the display panel of the liquid crystal display device, and a corresponding picture is displayed on the display panel according to the brightness signal and the privacy signal.
  • the adaptation signal corresponds to the LCD adaptation signal as an example.
  • the LCD adaptation signal is used to drive the liquid crystal molecules in the LCD display panel. After combining the above scenarios (that is, when it is detected that the anti-peep signal contains local anti-peep information, it is controlled based on the local anti-peep information and brightness signal.
  • the scene in which the first switching timing of the backlight working state of the backlight partition in the liquid crystal display device matches the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm), the picture displayed by the LCD display panel at this time 1
  • the user in the center can observe the information content presented on the entire LCD display panel;
  • the user in the non-center can only observe the information content in certain areas of the entire LCD display panel (that is, other backlight partitions corresponding to The information content on the LCD display panel) enables the LCD display panel to perform high-contrast picture display in local dynamic anti-peep mode under the backlight partition control of the MiniLED light panel.
  • the digital system unit receives and detects the screen display signals required for the liquid crystal display device to display the screen, and performs distribution processing according to different signal types in the screen display signals, so that the logic control unit can perform processing based on the distribution processing.
  • Different logic controls for example, when local anti-peep information is detected, the working state of the electronically controlled liquid crystal diaphragm is controlled to go back and forth between the transparent state and the turbid state according to the characteristics of the backlight partitions set at multiple intervals on the light panel.
  • Switching can perform anti-peep operation in the target backlight partition corresponding to the anti-peep screen position signal marked (that is, when the electronically controlled liquid crystal diaphragm switches to the transparent state, it switches to the lighted state, and when the electronically controlled liquid crystal diaphragm switches to the turbid state, it switches to off state), other backlight partitions corresponding to the position signal of the anti-peep screen that are not marked perform non-private operations, so that the backlight working status of each backlight partition matches the diaphragm working status of the electronically controlled liquid crystal diaphragm, thereby achieving the same display
  • the partial privacy protection effect on the panel provides users with personalized needs for partial privacy protection, which not only enhances the flexibility of the privacy protection technology, but also avoids the high power consumption of the full privacy protection state.
  • another embodiment of the present application provides a privacy control method for a liquid crystal display device. After the step of receiving and detecting the screen display signal required by the liquid crystal display device in step S10, it also includes:
  • Step S30 If it is detected that the privacy signal in the screen display signal is comprehensive privacy protection information, the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm is controlled based on the comprehensive privacy protection information. In the transparent state, and according to the brightness signal, the backlight operating state of the lamp panel is controlled to be the first switching opportunity of the lighting state.
  • the digital system unit When the digital system unit detects the privacy protection signal and obtains comprehensive privacy protection information, it indicates that the user at this time has privacy protection requirements for the entire display panel. Therefore, based on the comprehensive privacy protection information, the digital system unit controls the electronic The working state of the liquid crystal diaphragm is maintained in a transparent state.
  • the logic control unit controls the entire MiniLED light panel to be in a lighting state based on the brightness signal at this time, so that the collimated light emitted by the entire MiniLED light panel passes through the After peeking through the film and the electronically controlled liquid crystal diaphragm in the transparent state, the entire display panel is still projected with collimated light, so that the information content on the entire display panel at this time can only be viewed by the user in the center. Users in the center will not be able to view any information content.
  • the method further includes:
  • Step S40 If it is detected that the anti-peep signal in the screen display signal is fully visible information, the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm is controlled based on the fully visible information. In the turbid state, and according to the brightness signal, the backlight operating state of the lamp panel is controlled to be the first switching opportunity of the lighting state.
  • the digital system unit detects the anti-peep information and obtains comprehensive visual information, it means that the user at this time does not have the need to perform anti-peep operations on the display panel. Therefore, based on the comprehensive visual information, the digital system unit The working state of the electronically controlled liquid crystal diaphragm is controlled to remain in the turbid state.
  • the logic control unit controls the entire MiniLED light panel in the extinguished state based on the brightness signal at this time, so that the collimated light emitted by the entire MiniLED light panel passes through
  • the electronically controlled liquid crystal diaphragm in the turbid state is then dispersed, and the scattered light is projected on the entire display panel, so that the information content on the entire display panel at this time can be viewed by users at any viewing angle.
  • the user in addition to performing partial privacy protection operations on the information content displayed in a certain area on the display panel, the user can also perform comprehensive privacy protection operations and comprehensive visibility of the entire display panel based on actual needs. Depending on the operation, it provides users with diverse operational needs.
  • An embodiment of the present application also provides a liquid crystal display device, which includes:
  • a digital system for receiving and detecting screen display signals required by the liquid crystal display device wherein the screen display signals include brightness signals and anti-peep signals;
  • a logic control unit configured to control the backlight operation of the light panel in the liquid crystal display device according to the partial anti-peep information and the brightness signal if it is detected that the anti-peep signal in the screen display signal is local anti-peep information.
  • the first switching timing of the state is adapted to the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm, so as to realize partial anti-peep display of the liquid crystal display device.
  • the liquid crystal display device also includes: a light panel 20 and an electronically controlled liquid crystal diaphragm 50;
  • the light panel 20 includes a plurality of backlight partitions arranged at intervals, and the backlight partitions include target backlight partitions for projecting the privacy protection area.
  • the target backlight partitions are at a certain point.
  • the first switching timing of the bright state is synchronized with the second switching timing of the electronically controlled liquid crystal diaphragm 50 being in the transparent state; the first switching timing of the target backlight partition being in the extinguished state is synchronized with the electronically controlled liquid crystal diaphragm 50 being in the turbid state.
  • the second switching timing of the states is synchronized, wherein the lighting state and the extinguishing state are the backlight operating states of the backlight partition, and the transparent state and the turbid state are the film of the electronically controlled liquid crystal diaphragm 50 chip working status.
  • the liquid crystal display device also includes an optical adjustment control 30, a privacy film 40 and a display panel 60 that are stacked in sequence along the light emitting direction of the lamp panel;
  • the electronically controlled liquid crystal diaphragm 50 is disposed between the privacy film 40 and the display panel 60;
  • the light panel 20 , the optical adjustment control 30 , the privacy film 40 , the electronically controlled liquid crystal diaphragm 50 and the display panel 60 form a liquid crystal display assembly, wherein the liquid crystal display assembly is disposed in the support frame 10 .
  • the ordinary light panel in the existing liquid crystal display device is replaced with MiniLED (Mini LED) with multiple spaced backlight partitions.
  • MiniLED Small LED
  • the light panel 20 is a MiniLED light panel, it is composed of several lamp beads. Therefore, compared with the ordinary light panel, it can only perform the same brightness as a whole piece. In operation, the Mini LED light panel can operate with different local brightness, so that the brightness projected onto the electronically controlled liquid crystal diaphragm 50 can be controlled with different light and dark effects.
  • the electronically controlled liquid crystal diaphragm 50 realizes conversion between the transparent state and the turbid state through voltage adjustment. Therefore, based on the different states of the electronically controlled liquid crystal diaphragm 50, light sources with different light and dark effects are projected to achieve partial privacy protection of the liquid crystal display device.
  • the effect is that the translucent state, that is, the energized state of the electronically controlled liquid crystal diaphragm 50, can cause the incident light 102 (that is, the light emitted by the MiniLED light panel) to be collimated and emitted 101 on the display panel 60; see Figure 7
  • the turbid state that is, the power-off state of the electronically controlled liquid crystal diaphragm 50, can cause the incident light 102 to scatter and emit 103 on the display panel. Therefore, in order to provide an anti-peep effect when the electronically controlled liquid crystal diaphragm 50 is in the turbid state, this is
  • the target backlight partition at the time is switched to the extinguished state to avoid the scattering of incident light.
  • the first switching timing and the second switching timing only appear when the LCD device has anti-peeping requirements. The switching timing is conducive to achieving the anti-peeping effect. time point.
  • the target backlight partition refers to the partition that needs to be adapted to the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm 50 to provide a privacy protection effect.
  • the areas outside the target backlight partition are other backlight partitions.
  • the backlight The partitions do not need to have a privacy protection effect, so there is no need to adapt to the second switching timing of the diaphragm working state of the electronically controlled liquid crystal diaphragm 50 .
  • the display panel 60 on the liquid crystal display device is used to drive liquid crystal molecules according to the received adaptation signal to display the display screen;
  • the optical adjustment control 30 generally includes a diffuser sheet, a prism sheet, a composite diaphragm, a DBEF (Dual One or more combinations of Brightness Enhancement Film (reflective polarizing brightness enhancement film), etc., can mix the light source projected by the MiniLED light panel into a uniform surface light source; privacy film 40, used for non-collimation in the surface light source The light is filtered, that is, the surface light source is converted into small-angle collimated light. Each light ray is emitted approximately parallel and perpendicular to the display panel 60 .
  • the support frame 10 is used to ensure the stability and normal operation of the liquid crystal display device, and the support frame 10 includes a plurality of support structural members.
  • the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation.
  • the technical solution of the present application can be embodied in the form of a software product that is essentially or contributes to the existing technology.
  • the computer software product is stored in a storage medium (such as ROM/RAM) as mentioned above. , magnetic disk, optical disk), including several instructions to cause a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

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Abstract

一种液晶显示设备的防窥控制方法及液晶显示设备，方法包括:接收并检测液晶显示设备所需的画面显示信号，其中，画面显示信号包括亮度信号和防窥信号，若检测到画面显示信号中的防窥信号为局部防窥信息时，则根据亮度信号控制液晶显示设备中的灯板(20)的背光工作状态的第一切换时机与电控液晶膜片(50)的膜片工作状态的第二切换时机相适配，以实现液晶显示设备的局部防窥显示。

Description

液晶显示设备的防窥控制方法及液晶显示设备
本申请要求于2022年8月17日申请的、申请号为202210984826.0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
本申请涉及液晶显示领域，尤其涉及一种液晶显示设备的防窥控制方法及液晶显示设备。
 背景技术
在现有的液晶显示的防窥技术中，都是对液晶显示的整个显示面板进行处理，即基于需求控制整个显示面板切换为全防窥状态或不防窥状态，虽然满足了用户状态切换的需求，但整个显示面板进行全防窥状态或不防窥状态的切换使得用户可支配的灵活度较低，且全防窥状态下的显示面板存在高功耗的情况，无法满足用户针对性的防窥需求。
 技术问题
本申请的主要目地在于提供一种液晶显示设备的防窥控制方法及液晶显示设备，旨在解决当前的防窥技术因只能对整个显示面板进行防窥状态的切换而存在的灵活度低、功耗高，无法满足用户针对性的防窥需求的技术问题。
 技术解决方案
为实现上述目地，本申请提供一种液晶显示设备的防窥控制方法，所述液晶显示设备的防窥控制方法包括以下步骤；
接收并检测液晶显示设备所需的画面显示信号，其中，所述画面显示信号包括亮度信号和防窥信号；
若检测到所述画面显示信号中的防窥信号为局部防窥信息时，则根据所述亮度信号控制所述液晶显示设备中的灯板的背光工作状态的第一切换时机与电控液晶膜片的膜片工作状态的第二切换时机相适配，以实现所述液晶显示设备的局部防窥显示。
本申请还提供一种液晶显示设备，所述液晶显示设备包括：
数字系统单元，用于接收并检测液晶显示设备所需的画面显示信号，其中，所述画面显示信号包括亮度信号和防窥信号；
逻辑控制单元，用于若检测到所述画面显示信号中的防窥信号为局部防窥信息时，则根据所述局部防窥信息和亮度信号控制所述液晶显示设备中的灯板的背光工作状态的第一切换时机与电控液晶膜片的膜片工作状态的第二切换时机相适配，以实现所述液晶显示设备的局部防窥显示。
 有益效果
本申请通过基于数字系统单元对液晶显示设备显示画面所需的画面显示信号进行接收和检测，在检测到用户的局部防窥需求时，基于灯板中的多个目标背光分区的背光工作状态的第一切换时机与所述电控液晶膜片的膜片工作状态的第二切换时机相适配，使得背光分区在第一切换时机上发出的准直光线经由防窥膜和处于第二切换时机上的电控液晶膜片后，发出的光线依旧保持在准直光线上，例如在电控液晶膜片的膜片工作状态处于透亮状态的第二切换时机时，将此时的目标背光分区的背光工作状态切换为点亮状态的第一切换时机，进而使得目标背光分区的灯珠点亮后发出的光线穿过防窥膜和处于透亮状态下的电控液晶膜片后，保持在准直状态，使得正对着显示面板的用户才能看见光源，即使得处于中心的用户才能看到显示面板上的信息内容，实现了局部防窥显示的效果，为用户提供了局部防窥的个性化需求，增强了防窥技术的灵活度的同时，还避免了全防窥状态的高功耗的情况。
 附图说明
图1是本申请实施例方案涉及的硬件运行环境的终端结构示意图；
图2为本申请液晶显示设备的防窥控制方法一实施例的流程示意图；
图3为在目标背光分区为动态变动时，不同位置上的用户所能看到的场景示意图；
图4为本申请液晶显示设备的防窥控制方法中步骤S10的后续步骤示意图；
图5为本申请液晶显示设备的结构示意图；
图6为灯板为点亮状态下发出的入射光经由显示面板的准直状态示意图；
图7为灯板为点亮状态下发出的入射光经由显示面板的散射状态示意图。
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
 本发明的实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。
本申请实施例的主要解决方案是：通过接收并检测液晶显示设备所需的画面显示信号，并在检测到局部防窥信息时，根据局部防窥信息中的亮度信号控制背光分区的背光工作状态的第一切换时机与所述电控液晶膜片的膜片工作状态的第二切换时机适配，进而实现液晶显示设备的局部防窥显示。
在现有的液晶显示的防窥技术中，都是对液晶显示的整个显示面板进行处理，即基于需求控制整个显示面板切换为全防窥状态或不防窥状态，存在用户可支配的灵活度较低的问题，且全防窥状态下的显示面板存在高功耗的情况，无法满足用户针对性的防窥需求。
本申请提供一种解决方案，通过数字系统单元对液晶显示设备显示画面所需的画面显示信号进行接收和检测，基于灯板中的多个背光分区的背光工作状态的第一切换时机与所述电控液晶膜片的膜片工作状态的第二切换时机适配，通过在检测到接收的画面显示信号中的防窥信号为局部防窥信息时，根据所述局部防窥信息和亮度信号控制灯板中的各个背光分区的背光工作状态与电控液晶膜片的膜片工作状态相适配，使得背光分区在第一切换时机上发出的准直光线经由防窥膜和处于第二切换时机上的电控液晶膜片后，发出的光线依旧保持在准直光线上，进而实现显示面板的局部防窥，即提升了可支配的灵活度，满足用户针对性的局部防窥需求，又避免了全面防窥存在的高功耗情况。
如图1所示，图1是本申请实施例方案涉及的硬件运行环境的终端结构示意图。
本申请实施例液晶显示设备的防窥控制方法应用载体为液晶显示设备，如图1所示，该液晶显示设备可以包括：处理器1001，例如CPU，网络接口1004，用户接口1003，存储器1005，通信总线1002。其中，通信总线1002用于实现这些组件之间的连接通信。用户接口1003可以包括显示区（Display）、输入单元比如键盘（Keyboard），可选用户接口1003还可以包括标准的有线接口、无线接口。网络接口1004可选的可以包括标准的有线接口、无线接口（如WI-FI接口）。存储器1005可以是高速RAM存储器，也可以是稳定的存储器（non-volatile memory），例如磁盘存储器。存储器1005可选的还可以是独立于前述处理器1001的存储装置。
在一实施例中，液晶显示设备还可以包括摄像头、RF（Radio Frequency，射频）电路，传感器、音频电路、WiFi模块等等。其中，传感器比如光传感器、运动传感器以及其他传感器。具体地，光传感器可包括环境光传感器及接近传感器，其中，环境光传感器可根据环境光线的明暗来调节显示屏的亮度，接近传感器可在移动终端移动到耳边时，关闭显示屏和/或背光。作为运动传感器的一种，重力加速度传感器可检测各个方向上（一般为三轴）加速度的大小，静止时可检测出重力的大小及方向，可用于识别移动终端姿态的应用（比如横竖屏切换、相关游戏、磁力计姿态校准）、振动识别相关功能（比如计步器、敲击）等；当然，移动终端还可配置陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。
本领域技术人员可以理解，图1中示出的液晶显示设备结构并不构成对液晶显示设备的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
如图1所示，作为一种计算机存储介质的存储器1005中可以包括操作系统、网络通信模块、用户接口模块以及计算机处理程序。
在图1所示的终端中，网络接口1004主要用于连接后台服务器，与后台服务器进行数据通信；用户接口1003主要用于连接客户端（用户端），与客户端进行数据通信；而处理器1001可以用于调用存储器1005中存储的计算机处理程序，并执行以下操作：
接收并检测液晶显示设备所需的画面显示信号，其中，所述画面显示信号包括亮度信号和防窥信号；
若检测到所述画面显示信号中的防窥信号为局部防窥信息时，则根据所述亮度信号控制所述液晶显示设备中的灯板的背光工作状态的第一切换时机与电控液晶膜片的膜片工作状态的第二切换时机相适配，以实现所述液晶显示设备的局部防窥显示。
进一步地，处理器1001可以调用存储器1005中存储的计算机处理程序，还执行以下操作：
根据所述亮度信号控制所述液晶显示设备中的灯板的背光工作状态的第一切换时机与电控液晶膜片的膜片工作状态的第二切换时机相适配的步骤包括之前：根据所述局部防窥信息中的防窥画面位置信号对所述灯板进行目标背光分区和其他背光分区的划分，同时根据所述局部防窥信息中的膜片工作信号对所述电控液晶膜片的膜片工作状态进行控制。
进一步地，处理器1001可以调用存储器1005中存储的计算机处理程序，还执行以下操作：
当所述电控液晶膜片的膜片工作状态为处于透亮状态的第二切换时机时，根据所述亮度信号控制所述目标背光分区的背光工作状态为处于点亮状态的第一切换时机和控制所述其他背光分区的背光工作状态为处于熄灭状态的第一切换时机。
进一步地，处理器1001可以调用存储器1005中存储的计算机处理程序，还执行以下操作：
当所述电控液晶膜片的膜片工作状态为处于浑浊状态的第二切换时机时，根据所述亮度信号控制所述目标背光分区的背光工作状态为处于熄灭状态的第一切换时机和控制所述其他背光分区的背光工作状态为处于点亮状态的第一切换时机。
进一步地，处理器1001可以调用存储器1005中存储的计算机处理程序，还执行以下操作：
接收并检测液晶显示设备所需的画面显示信号的步骤之后，若检测到所述画面显示信号中的防窥信号为全面防窥信息时，则根据所述全面防窥信息将所述电控液晶膜片的膜片工作状态的第二切换时机控制在透亮状态，并根据所述亮度信号控制所述灯板的背光工作状态为处于点亮状态的第一切换时机。
进一步地，处理器1001可以调用存储器1005中存储的计算机处理程序，还执行以下操作：
接收并检测液晶显示设备所需的画面显示信号的步骤之后，若检测到所述画面显示信号中的防窥信号为全面可视信息时，则根据所述全面可视信息将所述电控液晶膜片的膜片工作状态的第二切换时机控制在浑浊状态，并根据所述亮度信号控制所述灯板的背光工作状态为处于点亮状态的第一切换时机。
进一步地，处理器1001可以调用存储器1005中存储的计算机处理程序，还执行以下操作：
画面显示信号还包括适配信号；
通过所述适配信号对所述液晶显示设备中的显示面板中的液晶分子进行驱动，并根据所述亮度信号和防窥信号在所述显示面板上进行对应画面的显示。
参照图2，本申请一实施例提供一种液晶显示设备的防窥控制方法，所述液晶显示设备的防窥控制方法包括以下步骤；
步骤S10，接收并检测液晶显示设备所需的画面显示信号，其中，所述画面显示信号包括亮度信号和防窥信号；
在本实施例中，显示面板在进行显示画面的显示前，液晶显示设备内部的数字系统单元会接收到处理显示画面所需的画面显示信号，其中，本实施例所需的画面显示信号包括亮度信号、防窥信号和适配信号，具体的还可为其他信号，本实施例不作限制。
当数字系统单元接收到画面显示信号后，会根据画面显示信号中的不同的信号类型进行分配处理，本实施例以防窥信号为主体，数字系统单元在接收到防窥信号后，对防窥信号所包含的信息进行检测，基于防窥信号中包含的不同信息结合亮度信号对MiniLED灯板进行不同的逻辑控制，其中，本实施例中所提及的MiniLED灯板等同于图5中的灯板。
步骤S20，若检测到所述画面显示信号中的防窥信号为局部防窥信息时，则根据所述亮度信号控制所述液晶显示设备中的灯板的背光工作状态的第一切换时机与电控液晶膜片的膜片工作状态的第二切换时机相适配，以实现所述液晶显示设备的局部防窥显示。
例如，当数字系统单元在对防窥信号进行检测后，得到的信息为局部防窥信息时，说明此时的用户存在对显示面板局部防窥的需求，则基于局部防窥信息，数字系统单元控制电控液晶膜片的膜片工作状态在透亮状态和浑浊状态之间进行来回切换，即控制电控液晶膜片以大于等于20Hz的频率在透亮状态和浑浊状态之间进行切换。
因为当电控液晶膜片在透亮状态下时，控制MiniLED灯板进行点亮，电控液晶膜片在浑浊状态下时，控制MiniLED灯板进行熄灭，能够避免液晶显示设备中入射光的散射，保证光线以准直的状态投射在显示面板上进行对应画面的显示，进而使得显示面板进入防窥状态，配合MiniLED灯板具有多个间隔设置的背光分区的特性，在控制电控液晶膜片的膜片工作状态在透亮状态和浑浊状态之间进行来回切换，能够在标记有防窥画面位置信号对应的背光分区，即目标背光分区进行防窥操作，未标记有防窥画面位置信号对应的背光分区，即其他背光分区进行非防窥操作，使得目标背光分区的背光工作状态的第一切换时机与电控液晶膜片的膜片工作状态的第二切换时机相适配，从而实现同一显示面板上的局部防窥效果。
在一实施例中，步骤S20中根据所述亮度信号控制所述液晶显示设备中的灯板的背光工作状态的第一切换时机与电控液晶膜片的膜片工作状态的第二切换时机相适配的步骤之前，还包括：
步骤S21，根据所述局部防窥信息中的防窥画面位置信号对所述灯板进行目标背光分区和其他背光分区的划分，同时根据所述局部防窥信息中的膜片工作信号对所述电控液晶膜片的膜片工作状态进行控制。
具体为，根据局部防窥信息中的防窥画面位置信号对MiniLED灯板进行目标背光分区和其他背光分区的划分，例如，用户通过操作设备控制显示面板的左半边为需防窥的区域，右半边不做控制，则基于此操作生成的防窥画面位置信号将显示面板的左半边对应的背光分区划分为目标背光分区，右半边对应的背光分区划分为其他背光分区。同时，根据局部防窥信息中的膜片工作信号，液晶显示设备中的逻辑控制单元控制电控液晶膜片在透亮状态和浑浊状态之间进行来回切换。
需要说明的是，参照图3所示，目标背光分区是可动态变动的，例如用户通过操作设备控制显示面板上显示的a为需防窥区域后，并对a的位置进行由左向右的移动操作（110和111代表a移动前所处的位置，112代表a当前所处的位置，因此图3的显示面板中的a的动态移动位置为由110→111→112），则基于a位置移动的轨迹对防窥画面位置信息进行更新，进而对防窥画面位置信息对应的目标背光分区进行更新，使得显示面板上需防窥的区域能够基于信息内容所展示位置的变化而动态变动，通过①用户（即处于中心的用户）的视觉框（即116）可知，不论a位于显示面板上的何处，①用户能够清楚的查看到处于显示面板上的a，反之，通过②用户（即处于非中心的用户）的视觉框（即117）可知，因局部防窥作用，②用户只能够查看到a以外的其他信息内容，对于a，②用户只能看到一块黑影，具体为113和114代表②用户眼中的a移动前所处的位置，115为②用户眼中a当前所处的位置，因此在②用户眼中的a的动态移动位置为113→114→115，进一步增强防窥技术的可支配灵活度和便捷性，避免需防窥的区域存在变动时，用户需进行重新操作设置的情况。
在一实施例中，步骤S20中根据所述亮度信号控制所述液晶显示设备中的灯板的背光工作状态和第一切换时机与电控液晶膜片的膜片工作状态的第二切换时机相适配的步骤包括：
步骤S22，当所述电控液晶膜片的膜片工作状态为处于透亮状态的第二切换时机时，根据所述亮度信号控制所述目标背光分区的背光工作状态为处于点亮状态的第一切换时机和控制所述其他背光分区的背光工作状态为处于熄灭状态的第一切换时机。
步骤S23，当所述电控液晶膜片的膜片工作状态为处于浑浊状态的第二切换时机时，根据所述亮度信号控制所述目标背光分区的背光工作状态为处于熄灭状态的第一切换时机和控制所述其他背光分区的背光工作状态为处于点亮状态的第一切换时机。
若此时电控液晶膜片的膜片工作状态切换为透亮状态时，则逻辑控制单元根据此时的亮度信号将目标背光分区的背光工作状态切换为点亮状态，将其他背光分区的背光工作状态切换为熄灭状态或点亮状态（为了实现高对比度的画面效果，其他背光分区的背光工作状态并不受电控液晶膜片的膜片工作状态和防窥与否信息的影响）；若此时电控液晶膜片的膜片工作状态切换为浑浊状态时，则逻辑控制单元根据此时的亮度信号将目标背光分区的背光工作状态切换为熄灭状态，将其他背光分区的背光工作状态切换为点亮状态，使得处于中心的用户能够观察到整个显示面板上的内容，而处于非中心的用户只能够观察到其他背光分区所对应的显示面板上的内容，以实现显示面板的局部防窥效果。
需注意的是，根据亮度信号对目标背光分区和其他背光分区进行的亮度调整，其调整方式可以是DC（电平）调光或PWM（Pulse Width Modulation，脉冲宽度调制）调光，若选用的为PWM调光，此时对目标背光分区和其他背光分区中的灯珠的调整频率为电控液晶膜片的频率的整数倍，例如当电控液晶膜片的频率为20Hz时，则目标背光分区和其他背光分区的频率可为40Hz、60Hz、80Hz等等，以整数倍进行类推。
在一实施例中，步骤S10中画面显示信号还包括适配信号；
步骤S11，通过所述适配信号对所述液晶显示设备中的显示面板中的液晶分子进行驱动，并根据所述亮度信号和防窥信号在所述显示面板上进行对应画面的显示。
以显示面板为LCD（Liquid Crystal Display，液晶显示器）显示面板，则适配信号对应的为LCD适配信号为例。
LCD适配信号用于对LCD显示面板中的液晶分子进行驱动，在结合如上所述的场景后（即检测到防窥信号中包含了局部防窥信息时，根据局部防窥信息和亮度信号控制液晶显示设备中的背光分区的背光工作状态的第一切换时机与所述电控液晶膜片的膜片工作状态的第二切换时机适配的场景），此时的LCD显示面板所展示的画面为①处于中心的用户：能够观察到整个LCD显示面板上所呈现的信息内容；②处于非中心的用户：只能够观察到整个LCD显示面板上某些区域上的信息内容（即其他背光分区对应的LCD显示面板上的信息内容），使得LCD显示面板能够在MiniLED灯板的背光分区控制下，进行局部动态防窥模式的高对比度画面展示。
在本实施例中，基于数字系统单元对液晶显示设备显示画面所需的画面显示信号进行接收和检测，根据画面显示信号中的不同的信号类型进行分配处理，使得逻辑控制单元能够基于分配处理进行不同的逻辑控制，例如在检测到局部防窥信息时，根据灯板具有多个间隔设置的背光分区的特性，控制电控液晶膜片的膜片工作状态在透亮状态和浑浊状态之间进行来回切换，能够在标记有防窥画面位置信号对应的目标背光分区进行防窥操作（即电控液晶膜片切换为透亮状态时切换为点亮状态，电控液晶膜片切换为浑浊状态时切换为熄灭状态），未标记有防窥画面位置信号对应的其他背光分区进行非防窥操作，使得各个背光分区的背光工作状态与电控液晶膜片的膜片工作状态相适配，从而实现同一显示面板上的局部防窥效果，为用户提供了局部防窥的个性化需求，增强了防窥技术的灵活度的同时，还避免了全防窥状态的高功耗的情况。
进一步的，参照图4，本申请另一实施例提供一种液晶显示设备的防窥控制方法，步骤S10中接收并检测液晶显示设备所需的画面显示信号的步骤之后，还包括：
步骤S30，若检测到所述画面显示信号中的防窥信号为全面防窥信息时，则根据所述全面防窥信息将所述电控液晶膜片的膜片工作状态的第二切换时机控制在透亮状态，并根据所述亮度信号控制所述灯板的背光工作状态为处于点亮状态的第一切换时机。
当数字系统单元在对防窥信号进行检测后，得到的信息为全面防窥信息时，说明此时的用户存在对整个显示面板的防窥需求，因此基于全面防窥信息，数字系统单元控制电控液晶膜片的膜片工作状态保持在透亮状态上，同时，逻辑控制单元基于此时的亮度信号将整个MiniLED灯板控制在点亮状态，使得整个MiniLED灯板发出的准直光线在经过防窥膜和透亮状态下的电控液晶膜片后，依旧以准直光线对整个显示面板进行投影，使得此时的整个显示面板上的信息内容只能被处于中心的用户查看到，而处于非中心的用户将查看不到任何信息内容。
在一实施例中，步骤S10中接收并检测液晶显示设备所需的画面显示信号的步骤之后，还包括：
步骤S40，若检测到所述画面显示信号中的防窥信号为全面可视信息时，则根据所述全面可视信息将所述电控液晶膜片的膜片工作状态的第二切换时机控制在浑浊状态，并根据所述亮度信号控制所述灯板的背光工作状态为处于点亮状态的第一切换时机。
当数字系统单元在对防窥信息进行检测后，得到的信息为全面可视信息时，说明此时的用户不存在对显示面板进行防窥操作的需求，因此基于全面可视信息，数字系统单元控制电控液晶膜片的膜片工作状态保持在浑浊状态上，同时，逻辑控制单元基于此时的亮度信号将整个MiniLED灯板控制在熄灭状态，使得整个MiniLED灯板发出的准直光线在经过浑浊状态下的电控液晶膜片后被发散，散射后的光线投射在整个显示面板上，使得此时的整个显示面板上的信息内容能够被处于任何可视化角度上的用户查看到。
在本实施例中，用户除了能够针对性的对显示面板上，某一区域上显示的信息内容进行局部防窥操作之外，还能基于实际需求进行整个显示面板的全面防窥操作和全面可视操作，为用户提供多样化的操作需求。
本申请实施例还提供一种液晶显示设备，所述液晶显示设备包括：
数字系统，用于接收并检测液晶显示设备所需的画面显示信号，其中，所述画面显示信号包括亮度信号和防窥信号；
逻辑控制单元，用于若检测到所述画面显示信号中的防窥信号为局部防窥信息时，则根据所述局部防窥信息和亮度信号控制所述液晶显示设备中的灯板的背光工作状态的第一切换时机与电控液晶膜片的膜片工作状态的第二切换时机相适配，以实现所述液晶显示设备的局部防窥显示。
参照图5，所述液晶显示设备还包括：灯板20和电控液晶膜片50；
所述灯板20包括多个间隔设置的背光分区，所述背光分区包括对防窥区域进行投影的目标背光分区，在所述液晶显示设备处于局部防窥模式时，所述目标背光分区处于点亮状态的第一切换时机与所述电控液晶膜片50处于透亮状态的第二切换时机同步；所述目标背光分区处于熄灭状态的第一切换时机与所述电控液晶膜片50处于浑浊状态的第二切换时机同步，其中，所述点亮状态和所述熄灭状态为所述背光分区的背光工作状态，所述透亮状态和所述浑浊状态为所述电控液晶膜片50的膜片工作状态。
进一步地，所述液晶显示设备还包括沿着所述灯板出光方向依次层叠设置光学调控件30、防窥膜40和显示面板60；
所述电控液晶膜片50设置于所述防窥膜40和所述显示面板60之间；
所述灯板20、光学调控件30、防窥膜40、电控液晶膜片50和显示面板60组成液晶显示组件，其中，所述液晶显示组件设置于支撑框架10内。
根据图5所呈现的将现有的液晶显示设备中的普通灯板更换为具有多个间隔设置的背光分区的MiniLED（Mini Light-Emitting Diode，次毫米发光二极管）灯板的液晶显示设备，因为灯板20类型为MiniLED的灯板是由若干个灯珠组成的，因此相对于普通灯板只能整块进行同一亮度的操作，MiniLED灯板能够进行局部不同亮度的操作，进而使得投射到电控液晶膜片50上的亮度能够进行不同明暗效果的控制。
而电控液晶膜片50通过电压的调节来实现在透亮状态和浑浊状态之间的转换，因此基于电控液晶膜片50的不同状态投射不同明暗效果的光源，实现液晶显示设备的局部防窥效果，参照图6所示，透亮状态即电控液晶膜片50的通电状态，能够使得入射光102（即MiniLED灯板发出的光线）在显示面板60上准直发出101；参照图7所示，浑浊状态即电控液晶膜片50的断电状态，能够使得入射光102在显示面板上散射发出103，因此，为了在电控液晶膜片50处于浑浊状态时起到防窥效果，则此时的目标背光分区切换为熄灭状态，避免存在入射光散射发出，而第一切换时机和第二切换时机只出现在液晶显示设备存在防窥需求的时候，切换时机即指有利于实现防窥效果的时间点。
而目标背光分区指的是需要和电控液晶膜片50的膜片工作状态的第二切换时机进行适配，起到防窥效果的分区，目标背光分区外的即为其他背光分区，该背光分区无需起到防窥效果，因此无需和电控液晶膜片50的膜片工作状态的第二切换时机进行适配。
此外，液晶显示设备上的显示面板60，用于根据接收到的适配信号驱动液晶分子，进行显示画面的显示；光学调控件30，一般包括扩散片、棱镜片、复合膜片、DBEF（Dual Brightness Enhancement Film，反射式偏光增亮膜）等中的一种或多种组合，能够将MiniLED灯板投射的光源混合为均匀的面光源；防窥膜40，用于对面光源中的非准直光线进行过滤，即将面光源转化为小角度的准直光，各光线近似平行发出，垂直于显示面板60。
而支撑框架10用于保证液晶显示设备的稳定和正常工作，支撑框架10包括多个支撑结构件。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者系统不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者系统所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者系统中还存在另外的相同要素。
上述本申请实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在如上所述的一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本申请各个实施例所述的方法。
以上仅为本申请的一些实施例，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围内。

Claims (15)

  1. 一种液晶显示设备的防窥控制方法，其中，所述液晶显示设备的防窥控制方法包括以下步骤；
    S10，接收并检测液晶显示设备所需的画面显示信号，其中，所述画面显示信号包括亮度信号和防窥信号；
    S20，若检测到所述画面显示信号中的防窥信号为局部防窥信息时，则根据所述亮度信号控制所述液晶显示设备中的灯板（20）的背光工作状态的第一切换时机与电控液晶膜片（50）的膜片工作状态的第二切换时机相适配，以实现所述液晶显示设备的局部防窥显示。
  2. 如权利要求1所述的液晶显示设备的防窥控制方法，其中，所述若检测到所述画面显示信号中的防窥信号为局部防窥信息时，则根据所述亮度信号控制所述液晶显示设备中的灯板（20）的背光工作状态的第一切换时机与电控液晶膜片（50）的膜片工作状态的第二切换时机相适配，以实现所述液晶显示设备的局部防窥显示的步骤包括：
    当数字系统单元在对所述防窥信号进行检测后，得到的信息为所述局部防窥信息时，所述数字系统单元控制所述电控液晶膜片（50）以大于等于20Hz的频率在透亮状态和浑浊状态之间进行切换。
  3. 如权利要求2所述的液晶显示设备的防窥控制方法，其中，所述透亮状态为所述电控液晶膜片（50）的通电状态，所述浑浊状态为所述电控液晶膜片（50）的断电状态。
  4. 如权利要求1所述的液晶显示设备的防窥控制方法，其中，所述根据所述亮度信号控制所述液晶显示设备中的灯板（20）的背光工作状态的第一切换时机与电控液晶膜片（50）的膜片工作状态的第二切换时机相适配的步骤之前，还包括：
    S21，根据所述局部防窥信息中的防窥画面位置信号对所述灯板（20）进行目标背光分区和其他背光分区的划分，同时根据所述局部防窥信息中的膜片工作信号对所述电控液晶膜片（50）的膜片工作状态进行控制。
  5. 如权利要求4所述的液晶显示设备的防窥控制方法，其中，所述目标背光分区指的是需要和所述电控液晶膜片（50）的膜片工作状态的第二切换时机进行适配，起到防窥效果的分区，且所述目标背光分区是可动态变动的分区。
  6. 如权利要求4所述的液晶显示设备的防窥控制方法，其中，所述根据所述亮度信号控制所述液晶显示设备中的灯板（20）的背光工作状态和第一切换时机与电控液晶膜片（50）的膜片工作状态的第二切换时机相适配的步骤包括：
    S22，当所述电控液晶膜片（50）的膜片工作状态为处于透亮状态的第二切换时机时，根据所述亮度信号控制所述目标背光分区的背光工作状态为处于点亮状态的第一切换时机和控制所述其他背光分区的背光工作状态为处于熄灭状态的第一切换时机。
  7. 如权利要求4所述的液晶显示设备的防窥控制方法，其中，所述根据所述亮度信号控制所述液晶显示设备中的灯板（20）的背光工作状态和第一切换时机与电控液晶膜片（50）的膜片工作状态的第二切换时机相适配的步骤包括：
    S23，当所述电控液晶膜片（50）的膜片工作状态为处于浑浊状态的第二切换时机时，根据所述亮度信号控制所述目标背光分区的背光工作状态为处于熄灭状态的第一切换时机和控制所述其他背光分区的背光工作状态为处于点亮状态的第一切换时机。
  8. 如权利要求7所述的液晶显示设备的防窥控制方法，其中，所述根据所述亮度信号控制所述目标背光分区的背光工作状态为处于熄灭状态的第一切换时机和控制所述其他背光分区的背光工作状态为处于点亮状态的第一切换时机的步骤包括：
    根据所述亮度信号，通过Pulse Width Modulation（PWM）调光方式对所述目标背光分区和所述其他背光分区进行调光，且对所述目标背光分区和所述其他背光分区中的灯珠的调整频率为所述电控液晶膜片（50）的频率的整数倍。
  9. 如权利要求1所述的液晶显示设备的防窥控制方法，其中，所述接收并检测液晶显示设备所需的画面显示信号的步骤之后，还包括：
    S30，若检测到所述画面显示信号中的防窥信号为全面防窥信息时，则根据所述全面防窥信息将所述电控液晶膜片（50）的膜片工作状态的第二切换时机控制在透亮状态，并根据所述亮度信号控制所述灯板（20）的背光工作状态为处于点亮状态的第一切换时机。
  10. 如权利要求1所述的液晶显示设备的防窥控制方法，其中，所述接收并检测液晶显示设备所需的画面显示信号的步骤之后，还包括：
    S40，若检测到所述画面显示信号中的防窥信号为全面可视信息时，则根据所述全面可视信息将所述电控液晶膜片（50）的膜片工作状态的第二切换时机控制在浑浊状态，并根据所述亮度信号控制所述灯板（20）的背光工作状态为处于点亮状态的第一切换时机。
  11. 如权利要求1所述的液晶显示设备的防窥控制方法，其中，所述画面显示信号还包括适配信号；
    S11，通过所述适配信号对所述液晶显示设备中的显示面板（60）中的液晶分子进行驱动，并根据所述亮度信号和防窥信号在所述显示面板（60）上进行对应画面的显示。
  12. 一种液晶显示设备，其中，所述液晶显示设备用于如权利要求1至7中任一所述的液晶显示设备的防窥控制方法，所述液晶显示设备包括：
    数字系统单元，用于接收并检测液晶显示设备所需的画面显示信号，其中，所述画面显示信号包括亮度信号和防窥信号；
    逻辑控制单元，用于若检测到所述画面显示信号中的防窥信号为局部防窥信息时，则根据所述局部防窥信息和亮度信号控制所述液晶显示设备中的灯板（20）的背光工作状态的第一切换时机与电控液晶膜片（50）的膜片工作状态的第二切换时机相适配，以实现所述液晶显示设备的局部防窥显示。
  13. 如权利要求12所述的液晶显示设备，其中，所述液晶显示设备还包括：灯板（20）和电控液晶膜片（50）；
    所述灯板（20）包括多个间隔设置的背光分区，所述背光分区包括对防窥区域进行投影的目标背光分区，在所述液晶显示设备处于局部防窥模式时，所述目标背光分区处于点亮状态的第一切换时机与所述电控液晶膜片（50）处于透亮状态的第二切换时机同步；所述目标背光分区处于熄灭状态的第一切换时机与所述电控液晶膜片（50）处于浑浊状态的第二切换时机同步，其中，所述点亮状态和所述熄灭状态为所述背光分区的背光工作状态，所述透亮状态和所述浑浊状态为所述电控液晶膜片（50）的膜片工作状态。
  14. 如权利要求13所述的液晶显示设备，其中，所述液晶显示设备还包括沿着所述灯板（20）出光方向依次层叠设置光学调控件（30）、防窥膜（40）和显示面板（60）；
    所述电控液晶膜片（50）设置于所述防窥膜（40）和所述显示面板（60）之间；
    所述灯板（20）、光学调控件（30）、防窥膜（40）、电控液晶膜片（50）和显示面板（60）组成液晶显示组件，其中，所述液晶显示组件设置于支撑框架（10）内。
  15. 如权利要求14所述的液晶显示设备，其中，
    所述显示面板（60）用于根据接收到的适配信号驱动液晶分子，进行显示画面的显示；
    所述光学调控件（30）包括扩散片、棱镜片，且所述光学调控件（30）能够将所述灯板（20）投射的光源混合为均匀的面光源；
    所述防窥膜（40）用于对所述面光源中的非准直光线进行过滤；
    所述支撑框架（10）用于保证所述液晶显示设备的稳定和正常工作，且所述支撑框架（10）包括多个支撑结构件。
PCT/CN2022/142111 2022-08-17 2022-12-26 液晶显示设备的防窥控制方法及液晶显示设备 WO2024036862A1 (zh)

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