CN107229147B - Liquid crystal display device and display method - Google Patents
Liquid crystal display device and display method Download PDFInfo
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- CN107229147B CN107229147B CN201610179920.3A CN201610179920A CN107229147B CN 107229147 B CN107229147 B CN 107229147B CN 201610179920 A CN201610179920 A CN 201610179920A CN 107229147 B CN107229147 B CN 107229147B
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- 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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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Abstract
The disclosure relates to a liquid crystal display device and a display method, and belongs to the technical field of liquid crystal display. The present disclosure discloses a liquid crystal display apparatus including a control unit, a display driving unit connected with the control unit, a liquid crystal display panel connected with the display driving unit, a barrier panel disposed between an upper polarizer and a lower polarizer of the liquid crystal display panel, and a backlight assembly located under the liquid crystal display panel. A plurality of barrier areas which are arranged in parallel and at intervals are distributed on the barrier panel. A control unit for transmitting the display image frame to the display driving unit; and the display driving unit is used for driving the liquid crystal display panel to display the display image frame on a plurality of liquid crystal display areas which are arranged in parallel and at intervals, and each liquid crystal display area is used for respectively displaying a part of display content in the display image frame. The liquid crystal display device provided by the present disclosure provides a visible range of a narrow viewing angle.
Description
Technical Field
The disclosure relates to the technical field of liquid crystal display, and in particular relates to a liquid crystal display device and a display method.
Background
Liquid crystal displays are one of the most common input and output devices on electronic devices. The liquid crystal display has the capability of displaying text information, image information and video information.
The current liquid crystal display screen is a wide-viewing-angle liquid crystal display screen generally, and the viewing angle is approximately in the range of 120-170 degrees. When a user uses the electronic device in a crowded place such as a bus and a subway, the user is easy to see the content on the liquid crystal display screen by other people around the user, and the privacy of the user is leaked.
Disclosure of Invention
In order to solve the problem that when the liquid crystal display screen is a wide-viewing-angle liquid crystal display screen, other people around the liquid crystal display screen can easily see the content on the liquid crystal display screen, and privacy of a user is leaked, the embodiment of the disclosure provides a liquid crystal display device and a display method. The technical scheme is as follows:
according to a first aspect of embodiments of the present disclosure, there is provided a liquid crystal display device including: the backlight module comprises a control unit, a display driving unit connected with the control unit, a liquid crystal display panel connected with the display driving unit, a barrier panel arranged between an upper polarizer and a lower polarizer of the liquid crystal display panel, and a backlight assembly positioned below the liquid crystal display panel; a plurality of barrier areas which are arranged in parallel and at intervals are distributed on the barrier panel;
the control unit is used for sending display image frames to the display driving unit;
the display driving unit is used for driving the liquid crystal display panel to display the display image frames on a plurality of liquid crystal display areas which are arranged in parallel and at intervals, and each liquid crystal display area is used for respectively displaying a part of display contents in the display image frames;
the backlight source assembly is arranged on the barrier panel, wherein the backlight source assembly emits light rays penetrating through a light transmission area between two adjacent barrier areas on the barrier panel, and the display content displayed in each liquid crystal display area is emitted to a preset visual range.
Optionally, the display driving unit is configured to determine, according to pre-stored first position information, positions of the plurality of liquid crystal display regions arranged in parallel and at intervals on the liquid crystal display panel; splitting the display image frame to obtain display contents respectively corresponding to each liquid crystal display area; driving each liquid crystal display area to respectively display the corresponding display content according to the position;
or the like, or, alternatively,
the control unit is also used for sending a first position determination instruction to the display driving unit; the display driving unit is used for determining the positions of the liquid crystal display areas which are arranged in parallel and at intervals on the liquid crystal display panel according to the first position determination instruction; splitting the display image frame to obtain display contents respectively corresponding to each liquid crystal display area; and driving each liquid crystal display area to respectively display the corresponding display content according to the position.
Optionally, the barrier panel is a liquid crystal barrier panel;
the liquid crystal display device further includes: a barrier driving unit; the barrier driving unit is respectively connected with the control unit and the liquid crystal barrier panel;
the control unit is also used for sending a barrier control instruction to the barrier driving unit;
and the barrier driving unit is used for controlling the liquid crystal barrier panel to form liquid crystal barriers on the barrier areas which are arranged in parallel and at intervals according to the barrier control instruction.
Optionally, the barrier driving unit is configured to determine, according to second pre-stored position information, positions of the plurality of barrier regions arranged in parallel and at intervals on the liquid crystal barrier panel; driving each barrier area to form a liquid crystal barrier corresponding to each barrier area according to the position;
or the like, or, alternatively,
the control unit is further used for sending a second position determination instruction to the barrier driving unit; the barrier driving unit is used for determining the positions of the barrier areas which are arranged in parallel and at intervals on the liquid crystal barrier panel according to the second position determination instruction; and driving each barrier area according to the position to respectively form a corresponding liquid crystal barrier.
Optionally, the control unit is further configured to send a state switching instruction to the display driving unit and the barrier driving unit when the working state is switched from the narrow viewing angle working state to the wide viewing angle working state;
the display driving unit is used for driving the liquid crystal display panel to display the display image frame on the whole display area after receiving the state switching instruction;
and the barrier driving unit is used for driving the liquid crystal barrier panel to cancel the formation of the liquid crystal barrier after receiving the state switching indication.
Optionally, the barrier panel is a film material on which the plurality of display barriers arranged in parallel and at intervals are distributed.
Optionally, the barrier panel is disposed between a TFT (Thin Film Transistor) array substrate of the liquid crystal display panel and the lower polarizer.
Optionally, the predetermined visual range is a range determined according to a binocular distance of the human eye.
Optionally, the display driving unit is further configured to drive an idle area between two adjacent liquid crystal display areas on the liquid crystal display panel to be in an idle state, or drive an idle area between two adjacent display areas on the liquid crystal display panel to display predetermined camouflage display content.
According to a second aspect of the embodiments of the present disclosure, there is provided a liquid crystal display method applied to a liquid crystal display device, the liquid crystal display device including: the backlight module comprises a control unit, a display driving unit connected with the control unit, a liquid crystal display panel connected with the display driving unit, a barrier panel arranged between an upper polarizer and a lower polarizer of the liquid crystal display panel, and a backlight assembly positioned below the liquid crystal display panel; a plurality of barrier areas which are arranged in parallel and at intervals are distributed on the barrier panel;
the method comprises the following steps:
the control unit sends a display image frame to the display driving unit;
the display driving unit drives the liquid crystal display panel to display the display image frames on a plurality of liquid crystal display areas which are arranged in parallel and at intervals, and each liquid crystal display area is used for respectively displaying a part of display contents in the display image frames;
the backlight source assembly is arranged on the barrier panel, wherein the backlight source assembly emits light rays penetrating through a light transmission area between two adjacent barrier areas on the barrier panel, and the display content displayed in each liquid crystal display area is emitted to a preset visual range.
Optionally, the driving unit drives the lcd panel to display the display image frame on a plurality of lcd regions arranged in parallel and at intervals, including:
the display driving unit determines the positions of the plurality of liquid crystal display areas which are arranged in parallel and at intervals on the liquid crystal display panel according to pre-stored first position information; splitting the display image frame to obtain display contents respectively corresponding to each liquid crystal display area; driving each liquid crystal display area to respectively display the corresponding display content according to the position;
or the like, or, alternatively,
the display driving unit receives a first position determination instruction sent by the control unit; determining the positions of the plurality of liquid crystal display areas which are arranged in parallel and at intervals on the liquid crystal display panel according to the first position determination instruction; splitting the display image frame to obtain display contents respectively corresponding to each liquid crystal display area; and driving each liquid crystal display area to respectively display the corresponding display content according to the position.
Optionally, the barrier panel is a liquid crystal barrier panel; the liquid crystal display device further includes: a barrier driving unit; the barrier driving unit is respectively connected with the control unit and the liquid crystal barrier panel;
the method further comprises the following steps:
the control unit sends a barrier control instruction to the barrier driving unit;
and the barrier driving unit controls the liquid crystal barrier panel to form liquid crystal barriers on the barrier areas which are arranged in parallel and at intervals according to the barrier control instruction.
Optionally, the barrier driving unit controls the liquid crystal barrier panel to form the liquid crystal barrier on the plurality of barrier areas arranged in parallel and at intervals according to the barrier control instruction, and includes:
the barrier driving unit determines the positions of the plurality of liquid crystal barrier areas which are arranged in parallel and at intervals on the liquid crystal barrier panel according to pre-stored second position information; driving each liquid crystal barrier area to form a liquid crystal barrier corresponding to each liquid crystal barrier area according to the position;
or the like, or, alternatively,
the barrier driving unit receives a second position determination instruction sent by the control unit; determining the positions of the plurality of liquid crystal barrier areas which are arranged in parallel and at intervals on the liquid crystal barrier panel according to the second position determination instruction; and driving each liquid crystal barrier area according to the position to form a liquid crystal barrier corresponding to each liquid crystal barrier area.
Optionally, the method further comprises:
when the working state is switched from the narrow visual angle working state to the wide visual angle working state, the control unit sends a state switching instruction to the display driving unit and the barrier driving unit;
the display driving unit drives the liquid crystal display panel to display the display image frame on the whole display area after receiving the state switching instruction;
and the barrier driving unit drives the liquid crystal barrier panel to cancel the formation of the liquid crystal barrier after receiving the state switching indication.
Optionally, the barrier panel is a film material on which the plurality of display barriers arranged in parallel and at intervals are distributed.
Optionally, the barrier panel is disposed between the TFT array substrate of the liquid crystal display panel and the lower polarizer.
Optionally, characterized in that the predetermined visual range is a range determined according to a binocular distance of the human eye.
Optionally, the method further comprises:
the display driving unit drives an idle area between two adjacent liquid crystal display areas on the liquid crystal display panel to be in a non-operating state;
alternatively, the first and second electrodes may be,
the display driving unit drives an idle area between two adjacent display areas on the liquid crystal display panel to display preset camouflage display contents.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the control unit sends display image frames to the display driving unit, the display driving unit drives the liquid crystal display panel to display the display image frames on a plurality of liquid crystal display areas which are arranged in parallel and at intervals, and each liquid crystal display area is used for respectively displaying a part of display content in the display image frames; the backlight source assembly is used for emitting light rays which penetrate through a light transmitting area between two adjacent barrier areas on the barrier panel, and the display content displayed in each liquid crystal display area is emitted to a preset visual range; the problem that when the liquid crystal display screen is a wide-viewing-angle liquid crystal display screen, other people around the liquid crystal display screen can easily see the content on the liquid crystal display screen, and the privacy of a user is revealed is solved; the effect that the visual range of the liquid crystal display panel is limited within the preset visual range, and the displayed image frame on the liquid crystal display panel cannot be seen or cannot be seen completely outside the preset visual range is achieved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a block diagram illustrating a liquid crystal display device according to an exemplary embodiment;
fig. 2 is a schematic structural view illustrating a liquid crystal display panel according to an exemplary embodiment;
fig. 3 is a block diagram illustrating a liquid crystal display device according to another exemplary embodiment;
FIG. 4 is a schematic diagram of the operation of the display device according to the embodiment shown in FIG. 1;
FIG. 5 is a schematic diagram illustrating the effect of the displayed image frame when displayed in the display device according to the embodiment shown in FIG. 1;
FIG. 6 is a schematic diagram of a display device according to the embodiment of FIG. 1;
FIG. 7 is a flow chart illustrating a method of liquid crystal display according to an exemplary embodiment;
fig. 8 is a flowchart illustrating a liquid crystal display method according to another exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Embodiments of the present disclosure are directed to providing a liquid crystal display device and a display method having a narrower viewing angle. Alternatively, the liquid crystal display device can also be switched between two modes of a wide viewing angle and a narrow viewing angle. The liquid crystal display device may be any electronic device having a liquid crystal display, such as a mobile phone, a tablet computer, and the like.
Fig. 1 is a block diagram illustrating a liquid crystal display device 100 according to an exemplary embodiment. The liquid crystal display device 100 may implement a liquid crystal display of a narrow viewing angle by a parallax barrier method. As shown in fig. 1, the liquid crystal display device 100 includes:
a control unit 120, a display driving unit 142 connected to the control unit, a liquid crystal display panel 144 connected to the display driving unit 142, a barrier panel 164 disposed between an upper polarizer and a lower polarizer of the liquid crystal display panel 144, and a backlight assembly (not shown) disposed below the liquid crystal display panel 144.
The control unit 120 may be a processor or a graphics processor. The control unit 120 has the capability of outputting display image frames and issuing control instructions.
The display driving unit 142 includes a liquid crystal driving circuit for driving the liquid crystal display panel 144 to display. The Liquid Crystal Display panel 144 is an LCD (Liquid Crystal Display) panel. Referring to fig. 2, a schematic diagram of a liquid crystal display panel 144 is shown. The liquid crystal display panel 144 includes, arranged from top to bottom: an upper polarizer 144a, a CF (Color Filter) substrate 144b, a liquid crystal layer 144c, a TFT array substrate 144d, and a lower polarizer 144 e.
A plurality of barrier areas are distributed on the barrier panel 164 in parallel and at intervals. The barrier area on the barrier panel 164 can block light emitted from the backlight assembly.
Optionally, the barrier panel 164 is a liquid crystal barrier panel. When the barrier panel 164 is a liquid crystal barrier panel, as shown in fig. 3, the liquid crystal display device 100 further includes: a barrier driving unit 162. The barrier driving unit 162 is connected to the control unit 120 and the barrier panel 164, respectively.
The barrier driving unit 162 includes a barrier driving circuit, which is also one of liquid crystal driving circuits, for driving the liquid crystal barrier panel to form the liquid crystal barrier. The liquid crystal barrier is a parallax barrier that does not transmit light or has light transmittance lower than a predetermined condition. The liquid crystal barrier is formed by driving liquid crystal molecules in the liquid crystal barrier panel to twist by the barrier driving unit 162.
Referring to fig. 4 in combination, fig. 4 shows an operational schematic diagram of the liquid crystal display panel 144 and the liquid crystal barrier panel 164a when in a narrow viewing angle operational state. The left-hand portion (a) of fig. 4 is a schematic side view of the liquid crystal display panel 144 and the liquid crystal barrier panel 164 a. The liquid crystal barrier panel 164a is positioned between the upper polarizer and the lower polarizer of the liquid crystal display panel 144. The lower right (b) portion in fig. 4 is a schematic front view of the liquid crystal barrier panel 164 a; the upper right portion (c) in fig. 4 is a schematic front view of the liquid crystal display panel 144.
When in the narrow viewing angle operating state, the control unit 120 sends a display image frame to the display driving unit 142; a barrier control instruction is sent to the barrier driving unit 162.
And the display driving unit 142 is used for driving the liquid crystal display panel 144 to display a display image frame on a plurality of liquid crystal display areas 143 which are arranged in parallel and at intervals, and each liquid crystal display area 143 is used for respectively displaying a part of display content in the display image frame. The union of the display contents displayed by all the liquid crystal display regions 143 is the same as the display image frame.
In other words, the display image frame is divided into a plurality of bar-shaped display contents, each of which is displayed in one of the liquid crystal display regions 143. Each of the liquid crystal display regions 143 is a rectangular stripe display region. The idle region 145 between two adjacent liquid crystal display regions 143 may not display any content.
In one possible embodiment, the length and the width of each liquid crystal display region 143 are the same, for example, the length of each liquid crystal display region 143 is 1080 pixels, and the width is 5 pixels. The width of the dummy regions 145 between each of the liquid crystal display regions 143 is also the same, for example, the width of each of the dummy regions 145 is 3 pixels. In another possible embodiment, there are at least two liquid crystal display regions 143 with the same length but different widths, for example, the width of the liquid crystal display region 143 in the central region of the liquid crystal display panel 144 is greater than the width of the liquid crystal display region 143 in the edge region of the liquid crystal display panel 144. At least two idle regions 145 have the same length but different widths, for example, the width of the idle region 145 located in the central region of the lcd panel 144 is greater than the width of the idle region 145 located in the edge region of the lcd panel 144. This embodiment is not limited to this.
The barrier driving unit 162 is configured to control the liquid crystal barrier panel 164a to form a liquid crystal barrier on a plurality of barrier regions 163 arranged in parallel and at intervals according to the barrier control instruction. The liquid crystal barrier is a parallax barrier that does not transmit light or has light transmittance lower than a predetermined condition. The liquid crystal barrier can block light emitted by the backlight source component.
In one possible embodiment, the length and width of each barrier region 163 are the same, for example, each barrier region 163 has a length of 1080 pixels and a width of 2 pixels. The width of the light-transmitting region 165 between each barrier region 163 is also the same, for example, the width of each light-transmitting region 165 is 3 pixels. In another possible embodiment, there are at least two barrier regions 163 having the same length but different widths, for example, the width of the barrier region 163 located at the center region of the barrier panel 164 is greater than the width of the barrier region 163 located at the edge region of the barrier panel 164. There are at least two light-transmitting regions 165 having the same length but different widths, for example, the width of the light-transmitting region 165 located at the central region of the barrier panel 164 is greater than the width of the light-transmitting region 165 located at the edge region of the barrier panel 164. This embodiment is not limited to this.
It is described above that the barrier panel 164 is implemented by the liquid crystal barrier panel 164 a. In other possible implementations, the barrier panel 164 is a film material with a plurality of display barriers arranged in parallel and at intervals. The display barrier on the barrier panel 164 has poor light transmittance, and the display barrier may be made of a material that is translucent, opaque, or blurry above a first threshold. The area between two adjacent display barriers is a light transmission area, and the light transmission area has better light transmission. For example, the light transmittance of the light-transmitting region is greater than a second threshold, such as 80%. When the barrier panel 164 is implemented by a film material, the width and the position of each display barrier may be designed according to actual requirements, which is not limited in this embodiment.
The light transmitted through the light-transmitting area between two adjacent barrier areas 163 on the barrier panel 164 in the light emitted from the backlight unit directs the display content displayed in each liquid crystal display area 143 to a predetermined visible range. That is, the display frame 10 is divided into a plurality of pieces of display contents to be displayed when displayed by the liquid crystal display device 100, and the front view of the final display screen 20 can refer to the schematic illustration in fig. 5. In practical use, the width of the barrier region between two display contents is relatively small, so that the influence on the final display effect observed by the naked eyes of a user can be reduced as much as possible.
Referring to fig. 6 in combination, the left side in fig. 6 is assumed to be the first direction, and the right side is assumed to be the second direction. Each liquid crystal display region 143 has an edge a in the first direction and an edge b in the second direction; the upper side of each liquid crystal display region 143 corresponds to two barrier regions 163. One of the barrier regions 163 has an edge c in the second direction, and the other barrier region 163 has an edge d in the first direction; the predetermined visible range has an edge e in the first direction and an edge f in the second direction.
For each liquid crystal display region 143, the rule is satisfied between the edges: the edge a, the edge c, and the edge e are located on the same plane, and the edge b, the edge d, and the edge f are located on the same plane, thereby ensuring that the display content in each liquid crystal display region 143 is completely visible only within a predetermined visible range. Note that the liquid crystal display region 143 located at the outermost edge may have a design different from that of fig. 6.
In addition, since the predetermined visible range is an area for both eyes of the user to see, the width of the predetermined visible range is set according to the eye-to-eye distance of the human eye, and the width ef is generally slightly larger than the eye-to-eye distance of the human eye. That is, the predetermined visible range is a range set according to the interocular distance of the human eye.
In one possible embodiment, the liquid crystal display region 143 is fixed in position on the liquid crystal display panel 144, and the barrier region 163 is fixed in position on the barrier panel 164. That is, the predetermined visible range is fixed. At this time:
the display driving unit 142 is used for determining the positions of a plurality of liquid crystal display areas 143 which are arranged in parallel and at intervals on the liquid crystal display panel 144 according to the pre-stored first position information; splitting the display image frame to obtain display contents respectively corresponding to each display area 143; each display area 143 is driven to display the corresponding display content according to the position.
Optionally, when the barrier panel 164 is a liquid crystal barrier panel, the barrier driving unit 162 is configured to determine the positions of a plurality of barrier regions 163 arranged in parallel and at intervals on the liquid crystal barrier panel 164 according to the pre-stored second position information; each barrier region 163 is driven according to the position to form a respective corresponding liquid crystal barrier.
In another possible embodiment, the position of the human eye is variable, and the distance G between the human eye and the liquid crystal display panel 144 is variable, so the predetermined visible range is variable. At this time:
the control unit 120 is further configured to send a first position determination instruction to the display driving unit 142. A display driving unit 142, configured to determine, according to the first position determination instruction, positions of a plurality of liquid crystal display regions 143 arranged in parallel and at intervals on the liquid crystal display panel 144; splitting the display image frame to obtain display contents respectively corresponding to each liquid crystal display area 143; each liquid crystal display area 143 is driven according to the position to display the corresponding display content.
Alternatively, when the barrier panel 164 is a liquid crystal barrier panel, the control unit 120 is further configured to send a second position determination instruction to the barrier driving unit 162. A barrier driving unit 162 for determining the positions of a plurality of barrier regions 163 arranged in parallel and at intervals on the liquid crystal barrier panel according to the second position determination instruction; each barrier region 163 is driven according to the position to form a respective corresponding liquid crystal barrier.
Wherein the first position determination instruction is for indicating the position of each liquid crystal display region 143; the second position determination instructions are for indicating the position of each barrier region 163.
Alternatively, when the position of each liquid crystal display region 143 is fixed and the barrier panel 164 is a liquid crystal barrier panel, the control unit 120 dynamically determines the position of each barrier region 163 according to the rule shown in fig. 6 according to the eye-to-eye distance ef of the human eyes, the projection coordinates of the human eyes on the liquid crystal display panel 144, the distance G between the human eyes and the liquid crystal display panel 144, and the distance L between the liquid crystal barrier panel 164 and the image display surface of the liquid crystal display panel 144.
Alternatively, when the position of each barrier region 163 is fixed, the control unit 120 dynamically determines the position of each liquid crystal display region 143 according to the rule shown in fig. 6, based on the eye-to-eye distance ef of the human eyes, the projection coordinates of the human eyes on the liquid crystal display panel 144, and the distance G between the human eyes and the liquid crystal display panel 144, and the distance L between the barrier panel 164 and the image display surface of the liquid crystal display panel 144.
The embodiment of the present disclosure does not limit how the control unit 120 obtains the binocular distance ef of the human eyes, the projection coordinates of the human eyes on the liquid crystal display panel 144, and the distance G between the human eyes and the liquid crystal display panel 144, and the control unit 120 may obtain the above parameters through a front camera, a distance sensor, and other devices.
It should be added that, in conjunction with the structural schematic diagram of the liquid crystal display panel 144 shown in fig. 2, the barrier panel 164 may be disposed at any position between the upper polarizer and the lower polarizer. For example, the barrier panel 164 is disposed between the upper polarizer and the CF substrate, or between the CF substrate and the liquid crystal layer, or between the liquid crystal layer and the TFT array substrate, or between the TFT array substrate and the lower polarizer. Alternatively, when the barrier panel 164 is disposed between the TFT array substrate and the lower polarizer, the display effect is optimal.
In summary, in the liquid crystal display device provided in this embodiment, the control unit sends the display image frames to the display driving unit, the display driving unit drives the liquid crystal display panel to display the display image frames on a plurality of liquid crystal display regions arranged in parallel and at intervals, and each liquid crystal display region is used for displaying a part of the display content in the display image frame; the backlight source assembly is used for emitting light rays which penetrate through a light transmitting area between two adjacent barrier areas on the barrier panel, and the display content displayed in each liquid crystal display area is emitted to a preset visual range; the problem that when the liquid crystal display screen is a wide-viewing-angle liquid crystal display screen, other people around the liquid crystal display screen can easily see the content on the liquid crystal display screen, and the privacy of a user is revealed is solved; the effect that the visual range of the liquid crystal display panel is limited within the preset visual range, and the displayed image frame on the liquid crystal display panel cannot be seen or cannot be seen completely outside the preset visual range is achieved.
In another alternative embodiment provided based on the embodiment described in fig. 1, when the barrier panel 164 is a liquid crystal barrier panel, the liquid crystal display device 100 has two operation modes: a wide view angle mode of operation and a narrow view angle mode of operation. The liquid crystal display device 100 can be switched between the above two operation modes.
When switching from the wide viewing angle operating mode to the narrow viewing angle operating mode, the control unit 120 sends a first state switching instruction to the display driving unit 142 and the barrier driving unit 162, and the display driving unit 142 and the barrier driving unit 162 operate according to the above-described operating manner.
When switching from the narrow viewing angle operating mode to the wide viewing angle operating mode, the control unit 120 sends a second state switching instruction to the display driving unit 142 and the barrier driving unit 162. The display driving unit 142 is configured to drive the liquid crystal display panel 142 to display a display image frame on the entire display area after receiving the second state switching instruction, that is, in a normal operation mode. And a barrier driving unit 162 for driving the liquid crystal barrier panel to cancel forming the liquid crystal barrier, that is, the entire liquid crystal barrier panel is in a transparent state or a semi-transparent state having a light transmittance higher than a predetermined value, after receiving the second state switching indication.
The embodiment can meet the display requirements of users in different use scenes by providing two optional working modes.
In another alternative embodiment provided based on the embodiment shown in fig. 1, when the liquid crystal display device 100 is in the narrow viewing angle operation mode, the idle area 145 between two adjacent liquid crystal display areas 143 in the liquid crystal display panel 144 may display predetermined disguised display contents, which are display contents for viewing in a range outside the predetermined visible range. The disguised display content may disguise the display image frames displayed in the liquid crystal display area 143, such as: if the displayed image frame is a game picture and the disguised display content is a web page picture, the game picture is seen within a predetermined visible range, but the web page picture is seen within a range outside the predetermined visible range.
Fig. 7 is a flowchart illustrating a liquid crystal display method according to an exemplary embodiment. The method is applied to the liquid crystal display device which comprises a control unit, a display driving unit connected with the control unit, a liquid crystal display panel connected with the display driving unit, a barrier panel arranged between an upper polarizer plate box and a lower polarizer plate of the liquid crystal display panel, and a backlight assembly positioned below the liquid crystal display panel. Wherein, a plurality of barrier areas which are arranged in parallel and at intervals are distributed on the barrier panel. The method provided by the embodiment can comprise the following steps.
In step 701, the control unit transmits a display image frame to the display driving unit.
In step 702, the display driving unit drives the liquid crystal display panel to display a display image frame on a plurality of liquid crystal display regions arranged in parallel and at intervals, each of the liquid crystal display regions being used for respectively displaying a portion of display content in the display image frame.
Among the light rays emitted by the backlight source component, the light rays penetrating through the light transmission area between two adjacent barrier areas on the barrier panel emit the display contents displayed by each liquid crystal display area to a preset visual range.
In summary, in the liquid crystal display method provided in this embodiment, the control unit sends the display image frames to the display driving unit, and the display driving unit drives the liquid crystal display panel to display the display image frames on a plurality of liquid crystal display regions arranged in parallel and at intervals, where each liquid crystal display region is used for displaying a part of the display content in the display image frame; the backlight source assembly is used for emitting light rays which penetrate through a light transmitting area between two adjacent barrier areas on the barrier panel, and the display content displayed in each liquid crystal display area is emitted to a preset visual range; the problem that when the liquid crystal display screen is a wide-viewing-angle liquid crystal display screen, other people around the liquid crystal display screen can easily see the content on the liquid crystal display screen, and the privacy of a user is revealed is solved; the effect that the visual range of the liquid crystal display panel is limited within the preset visual range, and the displayed image frame on the liquid crystal display panel cannot be seen or cannot be seen completely outside the preset visual range is achieved.
In an alternative embodiment provided based on the embodiment shown in fig. 7, as shown in fig. 8, the method includes:
in step 801, the control unit sends a display image frame to the display driving unit.
Since the display stream usually includes an image frame sequence consisting of one frame by one frame of display image frames, this step is performed periodically a plurality of times or when the display image frames change.
For example, the control unit executes this step every 1/24 second.
In step 802, the display driving unit drives the liquid crystal display panel to display a display image frame on a plurality of liquid crystal display regions arranged in parallel and at intervals, where each liquid crystal display region is used for respectively displaying a part of display content in the display image frame.
As a possible implementation, this step is implemented instead by:
1. the display driving unit determines the positions of a plurality of liquid crystal display areas which are arranged in parallel and at intervals on the liquid crystal display panel according to pre-stored first position information;
2. the display driving unit splits the display image frame to obtain display contents respectively corresponding to each liquid crystal display area;
3. and the display driving unit drives each liquid crystal display area to display the corresponding display content according to the position.
As another possible embodiment, the control unit further sends a first position determination instruction to the display driving unit, the first position determination instruction being for indicating a position of each of the liquid crystal display regions. Accordingly, this step may be alternatively implemented by:
1. the display driving unit receives a first position determination instruction sent by the control unit;
2. the display driving unit determines the positions of a plurality of liquid crystal display areas which are arranged in parallel and at intervals on the liquid crystal display panel according to the first position determination instruction;
3. the display driving unit splits the display image frame to obtain display contents respectively corresponding to each liquid crystal display area;
4. and the display driving unit drives each liquid crystal display area to respectively display the corresponding display content according to the position.
It should be noted that the barrier panel may be a liquid crystal barrier panel, or may be a film material on which a plurality of parallel display barriers are distributed at intervals.
Optionally, when the barrier panel is a liquid crystal barrier panel, the liquid crystal display device further includes: a barrier driving unit; the barrier driving unit is connected to the control unit and the liquid crystal barrier panel, respectively. The liquid crystal display method further comprises the following steps:
in step 803, the control unit sends a barrier control instruction to the barrier driving unit.
In step 804, the barrier driving unit controls the liquid crystal barrier panel to form the liquid crystal barrier on the plurality of barrier regions arranged in parallel and at intervals according to the barrier control command.
As a possible implementation, this step can be implemented by the following steps:
1. the barrier driving unit determines the positions of a plurality of liquid crystal barrier areas which are arranged in parallel and at intervals on the liquid crystal barrier panel according to the pre-stored second position information;
2. the barrier driving unit drives each liquid crystal barrier area to form a corresponding liquid crystal barrier according to the position.
As another possible embodiment, the control unit further sends a second position determination instruction to the barrier driving unit, the second position determination instruction indicating a position of each barrier region. Accordingly, this step may be alternatively implemented by:
1. the barrier driving unit receives a second position determination instruction sent by the control unit;
2. the barrier driving unit determines the positions of a plurality of liquid crystal barrier areas which are arranged in parallel and at intervals on the liquid crystal barrier panel according to the second position determination instruction;
3. the barrier driving unit drives each liquid crystal barrier area to form a corresponding liquid crystal barrier according to the position.
Among the light rays emitted by the backlight source component, the light rays penetrating through the light transmission area between two adjacent barrier areas on the barrier panel emit the display contents displayed by each liquid crystal display area to a preset visual range. Alternatively, the predetermined visible range is a range determined according to a binocular distance of the human eye.
Wherein steps 801-802 and 803-804 are steps performed in parallel.
Alternatively, when the barrier panel is a liquid crystal barrier panel, switching between a narrow viewing angle operating state and a wide viewing angle operating state may also be achieved. Switching from the narrow view operating state to the wide view operating state is accomplished by the following steps 805-807.
In step 805, when the operating state is switched from the narrow viewing angle operating state to the wide viewing angle operating state, the control unit sends a state switching instruction to the display driving unit and the barrier driving unit.
In step 806, the display driving unit drives the liquid crystal display panel to display a display image frame on the entire display area after receiving the state switching instruction.
In step 807, the barrier driving unit drives the liquid crystal barrier panel to cancel forming the liquid crystal barrier after receiving the state switching instruction.
Wherein step 806 and step 807 are steps performed in parallel.
It should be noted that, when the operating state is switched from the wide viewing angle operating state to the narrow viewing angle operating state, the process is the reverse of the above steps 801 to 807, which is easily contemplated by the skilled person through the description of the above steps 801 to 807 and the description in the foregoing device embodiment, and the description is not repeated herein.
It should be noted that, when the operating state is the narrow viewing angle operating state, the display driving unit drives an idle region between two adjacent liquid crystal display regions on the liquid crystal display panel to be in the non-operating state, or drives the idle region on the liquid crystal display panel to display predetermined camouflage display contents.
In addition, in order to obtain a better content display effect, a barrier panel is generally disposed between the TFT array substrate and the lower polarizer of the liquid crystal display panel.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (16)
1. A liquid crystal display device, characterized in that the liquid crystal display device comprises: the backlight module comprises a control unit, a display driving unit connected with the control unit, a liquid crystal display panel connected with the display driving unit, a barrier panel arranged between an upper polarizer and a lower polarizer of the liquid crystal display panel, and a backlight assembly positioned below the liquid crystal display panel; a plurality of barrier areas which are arranged in parallel and at intervals are distributed on the barrier panel;
the control unit is used for sending a display image frame and a first position determining instruction to the display driving unit;
the display driving unit is used for determining the positions of a plurality of liquid crystal display areas which are arranged in parallel and at intervals on the liquid crystal display panel according to the first position determination instruction; splitting the display image frame to obtain display contents respectively corresponding to each liquid crystal display area; driving each liquid crystal display area to respectively display the corresponding display content according to the position;
the backlight source assembly is arranged on the barrier panel, wherein the backlight source assembly emits light rays penetrating through a light transmission area between two adjacent barrier areas on the barrier panel, and the display content displayed in each liquid crystal display area is emitted to a preset visual range.
2. The liquid crystal display device according to claim 1, wherein the barrier panel is a liquid crystal barrier panel;
the liquid crystal display device further includes: a barrier driving unit; the barrier driving unit is respectively connected with the control unit and the liquid crystal barrier panel;
the control unit is also used for sending a barrier control instruction to the barrier driving unit;
and the barrier driving unit is used for controlling the liquid crystal barrier panel to form liquid crystal barriers on the barrier areas which are arranged in parallel and at intervals according to the barrier control instruction.
3. The liquid crystal display device according to claim 2,
the barrier driving unit is used for determining the positions of the plurality of barrier areas which are arranged in parallel and at intervals on the liquid crystal barrier panel according to pre-stored second position information; driving each barrier area to form a liquid crystal barrier corresponding to each barrier area according to the position;
or the like, or, alternatively,
the control unit is further used for sending a second position determination instruction to the barrier driving unit; the barrier driving unit is used for determining the positions of the barrier areas which are arranged in parallel and at intervals on the liquid crystal barrier panel according to the second position determination instruction; and driving each barrier area according to the position to respectively form a corresponding liquid crystal barrier.
4. The liquid crystal display device according to claim 2,
the control unit is further used for sending a state switching instruction to the display driving unit and the barrier driving unit when the working state is switched from the narrow-view working state to the wide-view working state;
the display driving unit is used for driving the liquid crystal display panel to display the display image frame on the whole liquid crystal display area after receiving the state switching indication;
and the barrier driving unit is used for driving the liquid crystal barrier panel to cancel the formation of the liquid crystal barrier after receiving the state switching indication.
5. The LCD device of claim 1, wherein the barrier panel is a film material having the plurality of barrier regions arranged in parallel and at intervals.
6. The liquid crystal display device according to any one of claims 1 to 5, wherein the barrier panel is disposed between the TFT array substrate of the liquid crystal display panel and the lower polarizer.
7. The liquid crystal display device according to any one of claims 1 to 5, wherein the predetermined visible range is a range determined in accordance with a binocular pitch of human eyes.
8. The liquid crystal display device according to any one of claims 1 to 5,
the display driving unit is further configured to drive an idle area between two adjacent liquid crystal display areas on the liquid crystal display panel to be in an inoperative state, or drive the idle area between two adjacent liquid crystal display areas on the liquid crystal display panel to display predetermined camouflage display contents.
9. A liquid crystal display method is applied to a liquid crystal display device, and the liquid crystal display device comprises: the backlight module comprises a control unit, a display driving unit connected with the control unit, a liquid crystal display panel connected with the display driving unit, a barrier panel arranged between an upper polarizer and a lower polarizer of the liquid crystal display panel, and a backlight assembly positioned below the liquid crystal display panel; a plurality of barrier areas which are arranged in parallel and at intervals are distributed on the barrier panel;
the method comprises the following steps:
the control unit sends a display image frame and a first position determining instruction to the display driving unit;
the display driving unit determines the positions of a plurality of liquid crystal display areas which are arranged in parallel and at intervals on the liquid crystal display panel according to the first position determination instruction; splitting the display image frame to obtain display contents respectively corresponding to each liquid crystal display area; driving each liquid crystal display area to respectively display the corresponding display content according to the position;
the backlight source assembly is arranged on the barrier panel, wherein the backlight source assembly emits light rays penetrating through a light transmission area between two adjacent barrier areas on the barrier panel, and the display content displayed in each liquid crystal display area is emitted to a preset visual range.
10. The liquid crystal display method according to claim 9, wherein the barrier panel is a liquid crystal barrier panel;
the liquid crystal display device further includes: a barrier driving unit; the barrier driving unit is respectively connected with the control unit and the liquid crystal barrier panel;
the method further comprises the following steps:
the control unit sends a barrier control instruction to the barrier driving unit;
and the barrier driving unit controls the liquid crystal barrier panel to form liquid crystal barriers on the barrier areas which are arranged in parallel and at intervals according to the barrier control instruction.
11. The method of claim 10, wherein the barrier driving unit controls the liquid crystal barrier panel to form the liquid crystal barrier on the plurality of barrier regions arranged in parallel and at intervals according to the barrier control command, and comprises:
the barrier driving unit determines the positions of the plurality of barrier areas which are arranged in parallel and at intervals on the liquid crystal barrier panel according to pre-stored second position information; driving each barrier area to form a liquid crystal barrier corresponding to each barrier area according to the position;
or the like, or, alternatively,
the barrier driving unit receives a second position determination instruction sent by the control unit; determining the positions of the plurality of barrier areas which are arranged in parallel and at intervals on the liquid crystal barrier panel according to the second position determination instruction; and driving each barrier area according to the position to respectively form a corresponding liquid crystal barrier.
12. The liquid crystal display method according to claim 10, further comprising:
when the working state is switched from the narrow visual angle working state to the wide visual angle working state, the control unit sends a state switching instruction to the display driving unit and the barrier driving unit;
the display driving unit drives the liquid crystal display panel to display the display image frame on the whole liquid crystal display area after receiving the state switching instruction;
and the barrier driving unit drives the liquid crystal barrier panel to cancel the formation of the liquid crystal barrier after receiving the state switching indication.
13. The method of claim 9, wherein the barrier panel is a film material on which the plurality of barrier regions are distributed in parallel and at intervals.
14. The liquid crystal display method of any of claims 9 to 13, wherein the barrier panel is disposed between the TFT array substrate and the bottom polarizer of the liquid crystal display panel.
15. The liquid crystal display method according to any one of claims 9 to 13, wherein the predetermined visible range is a range determined according to a binocular pitch of human eyes.
16. The liquid crystal display method according to any one of claims 9 to 13, further comprising:
the display driving unit drives an idle area between two adjacent liquid crystal display areas on the liquid crystal display panel to be in a non-operating state;
alternatively, the first and second electrodes may be,
the display driving unit drives an idle area between two adjacent liquid crystal display areas on the liquid crystal display panel to display preset camouflage display contents.
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| KR20080058974A (en) * | 2006-12-23 | 2008-06-26 | 엘지디스플레이 주식회사 | Flat panel display controllable viewing angle and multi-view |
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