CN110161730B - Anti-peeping method and device for screen panel and electronic equipment - Google Patents
Anti-peeping method and device for screen panel and electronic equipment Download PDFInfo
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- CN110161730B CN110161730B CN201910419325.6A CN201910419325A CN110161730B CN 110161730 B CN110161730 B CN 110161730B CN 201910419325 A CN201910419325 A CN 201910419325A CN 110161730 B CN110161730 B CN 110161730B
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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
- G02F1/1323—Arrangements for providing a switchable viewing angle
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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
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Abstract
The invention discloses a peeping-proof method and device for a screen panel and electronic equipment, wherein the method comprises the following steps: adjusting the reference potential of a first electrode and/or a second electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the first electrode and the reference potential of the second electrode to be a first preset potential difference; the liquid crystal in the corresponding area between the first electrode and the second electrode is driven to turn over by utilizing the first preset potential difference, so that light rays are emitted from the adjacent area of the corresponding area between the first electrode and the second electrode after passing through the turned liquid crystal. The method can cause the light leakage phenomenon of the adjacent area of the corresponding area between the first electrode and the second electrode, reduce the contrast of the corresponding area, reduce the visual angle of the screen, achieve the purpose of peeping prevention, cannot influence the display effect of the front side of the screen, cannot increase extra weight or thickness, and has better user experience.
Description
Technical Field
The invention relates to the field of displays, in particular to a peep-proof method and device for a screen panel and electronic equipment.
Background
The screen panel is a part of the electronic device that directly interacts with the user when the electronic device is used, and the user acquires information desired by the user through the content displayed on the screen panel. Due to the fact that the visual range of the screen is large, besides a user located on the front side of the screen, other people located in the visual range, especially people located at large visual angle positions on two sides of the screen, can also watch the content displayed in the current screen, and in order to protect the personal privacy of the user, the screen panel can achieve the purpose of peeping prevention through some special means.
The peep-proof means commonly used in the prior art includes that a liquid crystal layer is added, an additional backlight module or an additional electrode is added to realize the peep-proof effect, but the above means can cause the extra thickness or weight of the screen, the positive display effect of the screen can be influenced by adding the additional electrode, and the use experience of a user is further influenced.
Disclosure of Invention
The embodiment of the invention aims to provide a peeping preventing method, a peeping preventing device and electronic equipment for a screen panel, wherein the peeping preventing method can realize that under the condition of not adding any extra hardware, only the reference potential of a first electrode and/or a second electrode in a pixel is adjusted, liquid crystal between the electrodes is driven to turn over through a generated first preset potential difference, and then the direction of large-angle light in a liquid crystal area after the turning over is changed, so that the light leakage phenomenon of an adjacent area of a corresponding area between the first electrode and the second electrode is caused, the contrast of the corresponding area is reduced, the visual angle of a screen is reduced, and the purpose of peeping prevention is realized.
In order to solve the technical problem, the embodiment of the application adopts the following technical scheme: a method of peeping prevention of a screen panel, comprising: adjusting the reference potential of a first electrode and/or a second electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the first electrode and the reference potential of the second electrode to be a first preset potential difference; driving the liquid crystal in the corresponding area between the first electrode and the second electrode to turn over by using the first preset potential difference, so that light rays are emitted from the adjacent area of the corresponding area between the first electrode and the second electrode after passing through the turned liquid crystal; wherein the first electrode is adjacent to the second electrode, and the value of the first preset potential difference is within a first preset range.
Preferably, after the reference potentials of the first electrode and the second electrode are respectively adjusted, the method further comprises: adjusting the reference potential of a third electrode and/or a fourth electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the third electrode and the reference potential of the first electrode to be a second preset potential difference, and the difference value between the reference potential of the fourth electrode and the reference potential of the second electrode to be a third preset potential difference; wherein the third electrode is adjacent to the first electrode, the fourth electrode is adjacent to the second electrode, and a corresponding region between the third electrode and the first electrode and a corresponding region between the fourth electrode and the second electrode are both adjacent to a corresponding region between the first electrode and the second electrode; the second preset potential difference and the third preset potential difference are within a second preset range.
Preferably, before adjusting the reference potential of the first electrode and/or the second electrode in the pixel having the plurality of electrodes, the method further includes: detecting whether an anti-peeping mode is started or not; in the case where the peep prevention mode is turned on, the reference potential of the first electrode and/or the second electrode in the pixel having the plurality of electrodes is adjusted.
Preferably, a region between the first electrode and the second electrode corresponds to a black light-shielding film; the region between the third electrode and the first electrode and the region between the fourth electrode and the second electrode correspond to the color filter film.
Preferably, the light ray is emitted from a region adjacent to a corresponding region between the first electrode and the second electrode after passing through the inverted liquid crystal, and the method includes: after the light penetrates through the lower polarizer of the pixel, the light changes direction after passing through the turned liquid crystal and is emitted from the upper polarizer of the adjacent area of the corresponding area between the first electrode and the second electrode.
The embodiment of the invention also discloses a peeping prevention device of the screen panel, which is characterized by comprising the following components: the adjusting module is used for adjusting the reference potential of a first electrode and/or a second electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the first electrode and the reference potential of the second electrode to be a first preset potential difference; the driving module is used for driving the liquid crystal in the corresponding area between the first electrode and the second electrode to overturn by utilizing the first preset potential difference, so that light rays are emitted from the adjacent area of the corresponding area between the first electrode and the second electrode after passing through the overturned liquid crystal; wherein the first electrode is adjacent to the second electrode, and the value of the first preset potential difference is within a first preset range.
Preferably, the adjusting module is further configured to: adjusting the reference potential of a third electrode and/or a fourth electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the third electrode and the reference potential of the first electrode to be a second preset potential difference, and the difference value between the reference potential of the fourth electrode and the reference potential of the second electrode to be a third preset potential difference; wherein the third electrode is adjacent to the first electrode, the fourth electrode is adjacent to the second electrode, and a corresponding region between the third electrode and the first electrode and a corresponding region between the fourth electrode and the second electrode are both adjacent to a corresponding region between the first electrode and the second electrode; the second preset potential difference and the third preset potential difference are within a second preset range.
Preferably, the method further comprises the following steps: the detection module is used for detecting whether the peep-proof mode is started or not; in the case where the peep prevention mode is turned on, the adjustment module adjusts a reference potential of the first electrode and/or the second electrode in the pixel having the plurality of electrodes.
Preferably, a region between the first electrode and the second electrode corresponds to a black light-shielding film; the region between the third electrode and the first electrode and the region between the fourth electrode and the second electrode correspond to the color filter film.
The embodiment of the invention also discloses electronic equipment comprising the anti-peeping device of the screen panel.
The embodiment of the invention has the beneficial effects that: the method can realize that under the condition of not adding any extra hardware, only the reference potential of the first electrode and/or the second electrode in the pixel is adjusted, the liquid crystal between the electrodes is driven to turn over through the generated first preset potential difference, and then the direction of the large-angle light in the liquid crystal area after the turning over is changed, so that the light leakage phenomenon of the adjacent area of the corresponding area between the first electrode and the second electrode is caused, the contrast of the corresponding area is reduced, the visual angle of the screen is reduced, the anti-peeping purpose is achieved, the display effect of the front side of the screen is not influenced, extra weight or thickness is not increased, and the user experience is better.
Drawings
FIG. 1 is a schematic structural diagram of a screen panel according to an embodiment of the present invention;
fig. 2 is a flowchart of a peeping prevention method of a screen panel according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a light propagation path under a black frame according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a light propagation path under a color picture according to a first embodiment of the present invention;
fig. 5 is a flowchart of a peeping prevention method of a screen panel according to a second embodiment of the present invention;
fig. 6 is a flowchart of a peeping prevention method of a screen panel according to a third embodiment of the present invention;
fig. 7 is a schematic structural view of an anti-peeping device for a screen panel according to a fourth embodiment of the present invention;
fig. 8 is a schematic structural view of an anti-peeping device of a screen panel according to a fifth embodiment of the present invention.
Description of the reference numerals
1-lower polarizer 2-electrode glass
3-liquid crystal 4-light filtering film layer
5-Upper polarizer
Detailed Description
Various aspects and features of the present application are described herein with reference to the drawings.
It will be understood that various modifications may be made to the embodiments of the present application. Accordingly, the foregoing description should not be considered as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the application.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with a general description of the application given above and the detailed description of the embodiments given below, serve to explain the principles of the application.
These and other characteristics of the present application will become apparent from the following description of preferred forms of embodiment, given as non-limiting examples, with reference to the attached drawings.
It should also be understood that, although the present application has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of application, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.
The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.
Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely exemplary of the application, which can be embodied in various forms. Well-known and/or repeated functions and constructions are not described in detail to avoid obscuring the application of unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application in virtually any appropriately detailed structure.
The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the application.
The screen panel according to the embodiment of the present invention is mainly a Thin Film Transistor (TFT) screen panel (panel), and a schematic structural diagram of the panel is shown in fig. 1, and the panel mainly includes the following components: the liquid crystal display panel comprises a lower polarizer 1, electrode glass 2, liquid crystal 3 filled between the electrode glass 2 and a light filtering film layer 4, the light filtering film layer 4 and an upper polarizer 5. The electrode glass 2 is distributed with a plurality of electrodes, when the potentials applied to the adjacent electrodes are different, a potential difference is generated between the adjacent electrodes, the potential difference drives the liquid crystal filled in the corresponding area to turn over, the direction of the light entering the area is changed, the light can penetrate through the filter film with the corresponding color and then passes through the upper polarizer, and the corresponding color can be displayed. It should be understood that the area described in this embodiment refers to a space formed by two adjacent electrodes between the electrode glass 2 and the filter film layer 3, the space is filled with the liquid crystal 3, and the light can directly enter the area formed between the electrodes after passing through the lower polarizer 1.
Specifically, a red filter, a green filter, and a blue filter (not shown in fig. 1) form a basic pixel, the colored filters can also be collectively referred to as color filters, a black light-shielding film is disposed between two color filters, a region formed between each pair of adjacent electrodes corresponds to a color filter or a black light-shielding film, and light rays at any angle and intensity cannot pass through the region covered by the light-shielding film. The lower polarizer 1 and the upper polarizer 5 are orthogonally arranged, that is, the transmission axis of the lower polarizer 1 is perpendicular to the transmission axis of the upper polarizer 5, light rays cannot pass through the upper polarizer 5 after passing through the lower polarizer 1 under the condition of not changing directions, and human eyes cannot acquire corresponding color display.
The first embodiment of the present invention provides a peep-proof method for a screen panel, where the screen panel may be a screen of an electronic device such as a computer and a mobile phone, and a flowchart implemented by the method is shown in fig. 2, and mainly includes steps S201 and S202:
s201, adjusting the reference potential of a first electrode and/or a second electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the first electrode and the reference potential of the second electrode to be a first preset potential difference.
In this embodiment, the first electrode and the second electrode are two adjacent electrodes in a pixel having a plurality of electrodes, which correspond to black light shielding film portions in particular, and a first preset potential difference is generated between the first electrode and the second electrode by adjusting a reference potential to either one or both of the first electrode and the second electrode to provide driving of inversion of the liquid crystal in a region formed between the first electrode and the second electrode.
It will be appreciated that the value of the first preset potential difference should be within a first preset range, which does not include zero, i.e. the value of the first preset potential difference cannot be zero, since the liquid crystal needs to be flipped in the presence of the potential difference; the specific value of the first preset range is actually adjusted according to different designs of the liquid crystal material and the panel, the selection of the specific value of the first preset potential difference is determined according to the requirement of an actual peep-proof effect, and the optimal condition is that the first preset potential difference can enable the liquid crystal in the area to be overturned by the maximum angle.
S202, driving the liquid crystal in the corresponding area between the first electrode and the second electrode to turn over by using a first preset potential difference, so that light rays are emitted from the adjacent area of the corresponding area between the first electrode and the second electrode after passing through the turned liquid crystal.
After the reference potential of the first electrode and/or the second electrode is adjusted, a first preset potential difference is generated between the first electrode and the second electrode, liquid crystal filled in an area corresponding to the first electrode and the second electrode is overturned due to the driving of the first preset potential difference, so that all light rays in the area are changed in direction under the action of the overturned liquid crystal, large-angle light rays in all the light rays can be emitted through an adjacent area of the corresponding area between the first electrode and the second electrode, and light rays at other angles except the large-angle light rays are shielded by black to be incapable of passing through. The high-angle light refers to light entering from the regions corresponding to the two adjacent electrodes and can exit from other regions adjacent to the regions, as shown by solid arrows in fig. 3 or fig. 4, and light rays at other angles except the high-angle light enter from the regions corresponding to the two adjacent electrodes and should exit from the regions, as shown by dotted arrows in fig. 3 or fig. 4.
Furthermore, after the large-angle light passes through the lower polarizer of the pixel, the light with the vibration direction vertical to the transmission axis of the lower polarizer is absorbed, only the light parallel to the transmission axis of the lower polarizer is emitted into the liquid crystal area, but because the first preset potential difference exists between the first electrode and the second electrode, the liquid crystal between the first electrode and the second electrode is turned, taking the maximum turning angle of the liquid crystal as an example, after the light parallel to the transmission axis of the lower polarizer is emitted into the liquid crystal area, the direction of the light is changed along with the turning of the liquid crystal, so that the light is changed into the light vertical to the transmission axis of the lower polarizer, but because the transmission axis of the upper polarizer is vertical to the transmission axis of the lower polarizer, the light vertical to the transmission axis of the lower polarizer is the light parallel to the transmission axis of the upper polarizer, the light can be emitted through the upper polarizer of the adjacent area between the first electrode and the second electrode after the liquid crystal is turned, causing light leakage.
As shown in fig. 3, since the adjacent areas of the corresponding areas between the first electrode and the second electrode are the areas covered with the color filter, when the current pixel is mainly displaying a black frame (i.e. the liquid crystal corresponding to the color filter in the current pixel is not turned over), light leakage of the color filter area is caused after the light is emitted, and then the brightness of the current pixel is improved.
In addition, if the current frame is mainly a color frame (i.e., the liquid crystal in at least one color filter region in a pixel is inverted), light can leak in a corresponding color according to the color of the filter in the adjacent region after passing through the adjacent region of the corresponding region between the first electrode and the second electrode. For example, as shown in fig. 4, when the liquid crystal of the current pixel corresponding to the red filter region deflects, the light changes direction after passing through the liquid crystal of the region, and is emitted after passing through the upper polarizer 5, the front of the pixel is displayed in red, when a first preset potential difference exists between the first electrode and the second electrode, a large-angle light is emitted after passing through the green filter film, so as to generate a green light leakage phenomenon, and when the pixel is viewed at a large angle, the original red display effect is affected due to the green light leakage, so that the viewing effect of the large-angle situation is reduced, and the purpose of peeping prevention is achieved.
It should be understood that there are a plurality of regions corresponding to the black light-shielding film in one screen panel, and in actual use, the reference potentials of all the adjacent electrodes forming the regions corresponding to the black light-shielding film in all the pixels of the screen panel should be adjusted at the same time, and the first electrode and the second electrode described in this embodiment are only a pair of schematic electrodes among all the adjacent electrodes forming the regions corresponding to the black light-shielding film in all the pixels of the screen panel.
The second embodiment of the present invention provides another peeping prevention method for a screen panel, and the flow chart of the method is as shown in fig. 5, and mainly includes steps S501 to S503:
s501, adjusting a reference potential of a first electrode and/or a second electrode in a pixel having a plurality of electrodes to make a difference between the reference potential of the first electrode and the reference potential of the second electrode be a first preset potential difference.
And S502, adjusting the reference potential of a third electrode and/or a fourth electrode in the pixel with a plurality of electrodes to enable the difference value between the reference potential of the third electrode and the reference potential of the first electrode to be a second preset potential difference, and enabling the difference value between the reference potential of the fourth electrode and the reference potential of the second electrode to be a third preset potential difference.
S503, driving the liquid crystal in the corresponding area between the first electrode and the second electrode to turn over by using the first preset potential difference, so that the light is emitted from the adjacent area of the corresponding area between the first electrode and the second electrode after passing through the turned liquid crystal.
Steps S501 and S503 in this embodiment are identical to steps S201 and S202 in the first embodiment of the present invention, and detailed description thereof will not be provided.
As shown in fig. 3 or fig. 4, the third electrode is adjacent to the first electrode, the fourth electrode is adjacent to the second electrode, and the corresponding region between the third electrode and the first electrode and the corresponding region between the fourth electrode and the second electrode are both adjacent to the corresponding region between the first electrode and the second electrode, that is, the region formed between the third electrode and the first electrode and the region formed between the fourth electrode and the second electrode correspond to the color filter, wherein, according to the schematic diagram of fig. 3 or fig. 4, the region formed between the third electrode and the first electrode corresponds to the red filter, and the region formed between the fourth electrode and the second electrode corresponds to the green filter.
When the reference potential of the third electrode and/or the fourth electrode is adjusted, the reference potential is mainly determined according to the color which needs to be displayed currently. If a black picture needs to be displayed, adjusting the reference potential of the third electrode to be the same as the reference potential of the first electrode, so that a second preset potential difference between the third electrode and the first electrode is zero, adjusting the reference potential of the fourth electrode to be the same as the reference potential of the second electrode, so that a third potential difference between the fourth electrode and the second electrode is zero, at the moment, liquid crystals in an area formed by the third electrode and the first electrode and an area formed by the fourth electrode and the second electrode are not turned over, light cannot penetrate through the upper polarizer, and the color cannot be displayed, and at the moment, a pixel is a black picture; if a color picture needs to be displayed, the reference potential of the third electrode and/or the fourth electrode is adjusted according to the requirement on the actual color of the picture and the difference of liquid crystal material and panel design, so that the liquid crystal in the corresponding area is driven by the values of the second preset potential difference and the third preset potential difference to turn over the angle to meet the actual requirement. Therefore, the values of the second preset potential difference and the third preset potential difference should be within a second preset range, and the maximum value should be based on the potential difference value when the second preset potential difference and the third preset potential difference turn over the liquid crystal in the area by the maximum angle.
The third embodiment of the present invention provides another peeping-proof method for a screen panel, and the flowchart implemented by the method is shown in fig. 6, and mainly includes steps S601 to S603:
s601, detecting whether an anti-peeping mode is started, executing the step S602 under the condition that the anti-peeping mode is started, and otherwise, adjusting the reference potential of each electrode in the screen panel according to actual display requirements.
S602, adjusting the reference potential of the first electrode and/or the second electrode in the pixel with the plurality of electrodes to enable the difference value between the reference potential of the first electrode and the reference potential of the second electrode to be a first preset potential difference.
S603, the liquid crystal in the corresponding area between the first electrode and the second electrode is driven to turn over by using the first preset potential difference, so that light rays are emitted from the adjacent area of the corresponding area between the first electrode and the second electrode after passing through the turned-over liquid crystal.
Steps S602 and S603 in this embodiment are identical to steps S201 and S202 in the first embodiment of the present invention, and detailed description thereof will not be provided.
In actual use, whether the peeping-preventing mode needs to be started or not can be determined according to the requirements of a user or preset settings, in the normal display mode, no potential difference exists between the first electrode and the second electrode, and liquid crystals in the corresponding area cannot turn over, so that the light leakage phenomenon cannot be generated, the contrast ratio when the screen panel is watched at a large angle cannot be influenced, and the visual angle of the screen panel is larger; after the peeping prevention mode is started, light rays with large angles can pass through the color filter film area, so that the light leakage phenomenon is caused, the contrast ratio under the large angles is influenced, the visual angle of the screen panel is reduced, and the peeping prevention effect is achieved. Through the detection of whether the peep-proof mode is started or not, the potential difference does not need to exist between the first electrode and the second electrode under the condition that the peep-proof mode is not started, and the consumption of electric quantity is further reduced.
Specifically, the method for detecting whether to turn on the peep-proof mode at least can include but is not limited to one or more of the following modes: whether a user turns on a switch or a button of the peep-proof mode, whether the peep-proof mode is started in the setting, whether the turning-on time period is set for the peep-proof mode, and the like are detected.
A fourth embodiment of the present invention provides an anti-peeping device for a screen panel, a schematic structural diagram of which is shown in fig. 7, and the device mainly includes: the driving module 20 is coupled to the adjusting module 10, wherein the adjusting module 10 is configured to adjust a reference potential of a first electrode and/or a second electrode in a pixel having a plurality of electrodes, so that a difference between the reference potential of the first electrode and the reference potential of the second electrode is a first preset potential difference; the driving module 20 is configured to drive the liquid crystal in the corresponding area between the first electrode and the second electrode to turn over by using a first preset potential difference, so that the light is emitted from the adjacent area of the corresponding area between the first electrode and the second electrode after passing through the turned liquid crystal.
In the present embodiment, the first electrode and the second electrode are two adjacent electrodes in a pixel having a plurality of electrodes, and specifically correspond to black light shielding film portions, and the adjustment module 10 generates a first preset potential difference between the first electrode and the second electrode by adjusting a reference potential for either or both of the first electrode and the second electrode, so as to provide driving of inversion of the liquid crystal in an area formed between the first electrode and the second electrode.
It will be appreciated that the value of the first predetermined potential difference should be within a first predetermined range, which does not include zero, i.e. the value of the first predetermined potential difference is not zero, since the liquid crystal needs to be flipped in the presence of the potential difference; the specific value of the first preset range is actually adjusted according to different designs of the liquid crystal material and the panel, the selection of the specific value of the first preset potential difference is determined according to the requirement of an actual peep-proof effect, and the optimal condition is that the first preset potential difference can enable the liquid crystal in the area to be overturned by the maximum angle.
After the adjusting module 10 adjusts the reference potential of the first electrode and/or the second electrode, a first preset potential difference is generated between the first electrode and the second electrode, the driving module 20 drives the liquid crystal filled in the area corresponding to the first electrode and the second electrode by using the first preset potential difference to turn over the liquid crystal, so that all light rays in the area are changed in direction under the action of the turned liquid crystal, and then large-angle light rays in all light rays can be emitted through the adjacent area of the corresponding area between the first electrode and the second electrode, and light rays at other angles except the large-angle light rays are shielded by black and cannot pass through the light rays. The high-angle light rays are incident from the area corresponding to the black light shielding film, and can be emitted from the area of the color filter film adjacent to the black light shielding film, as shown by the solid line arrows in fig. 3 or fig. 4, while the light rays at other angles except the high-angle light rays are incident from the area corresponding to the black light shielding film, and the light rays which should be emitted from the black light shielding film are shown by the dotted line arrows in fig. 3 or fig. 4.
Because the adjacent areas of the corresponding areas between the first electrode and the second electrode are the areas covered with the color filter films, under the condition that the current pixel is mainly used for displaying a black picture (namely liquid crystals corresponding to the color filter films in the current pixel are not overturned), the light leakage phenomenon of the color filter film areas can be caused after the light rays are emitted, so that the brightness under the black picture is improved, according to the definition of the contrast, the contrast can be reduced when the brightness of the black picture is improved, the observation capability of human eyes on the picture is reduced, and the purpose of peeping prevention is achieved.
In addition, if the current frame is mainly a color frame (i.e., the liquid crystal in at least one color filter region in a pixel is inverted), light can leak in a corresponding color according to the color of the filter in the adjacent region after passing through the adjacent region of the corresponding region between the first electrode and the second electrode. When the large-angle viewer watches at a large angle, the display effect of the originally displayed color is influenced due to the light leakage of other colors, so that the viewing effect of the large-angle condition is reduced, and the purpose of peeping prevention is achieved.
It should be understood that there are a plurality of regions corresponding to the black light-shielding film in one screen panel, and in actual use, the adjusting module 10 should adjust the reference potentials of all the adjacent electrodes forming the regions corresponding to the black light-shielding film in all the pixels of the screen panel at the same time, and the first electrode and the second electrode described in this embodiment are only a pair of schematic electrodes among all the adjacent electrodes forming the regions corresponding to the black light-shielding film in all the pixels of the screen panel.
Preferably, the adjusting module 10 is further configured to adjust the reference potential of the third electrode and/or the fourth electrode in the pixel having the plurality of electrodes, so that the difference between the reference potential of the third electrode and the reference potential of the first electrode is a second preset potential difference, and the difference between the reference potential of the fourth electrode and the reference potential of the second electrode is a third preset potential difference. The third electrode is adjacent to the first electrode, the fourth electrode is adjacent to the second electrode, a corresponding region between the third electrode and the first electrode and a corresponding region between the fourth electrode and the second electrode are both adjacent to a corresponding region between the first electrode and the second electrode, namely, a region formed between the third electrode and the first electrode and a region between the fourth electrode and the second electrode correspond to the color filter film.
The adjustment module 10 mainly determines the current color to be displayed when adjusting the reference potential of the third electrode and/or the fourth electrode. If a black picture needs to be displayed, adjusting the reference potential of the third electrode to be the same as the reference potential of the first electrode, so that a second preset potential difference between the third electrode and the first electrode is zero, adjusting the reference potential of the fourth electrode to be the same as the reference potential of the second electrode, so that a third potential difference between the fourth electrode and the second electrode is zero, at the moment, liquid crystals in an area formed by the third electrode and the first electrode and an area formed by the fourth electrode and the second electrode are not turned over, light cannot penetrate through the upper polarizer, and the color cannot be displayed, and at the moment, a pixel is a black picture; if a color picture needs to be displayed, the reference potential of the third electrode and/or the fourth electrode is adjusted according to the requirement on the actual color of the picture and the difference of liquid crystal material and panel design, so that the values of the second preset potential difference and the third preset potential difference drive the liquid crystal in the corresponding area to turn over at an angle to meet the actual requirement. Therefore, the values of the second preset potential difference and the third preset potential difference should be within a second preset range, and the maximum value should be based on the potential difference value when the second preset potential difference and the third preset potential difference turn over the liquid crystal in the region by the maximum angle.
The fifth embodiment of the present invention provides another peep-proof device for a screen panel based on the fourth embodiment, the schematic structural diagram of which is shown in fig. 8, and the peep-proof device mainly includes: the display device comprises a detection module 30, an adjustment module 10 coupled with the detection module 30, and a driving module 20 coupled with the adjustment module 10, wherein the detection module 30 is mainly used for detecting whether an anti-peeping mode is started, and under the condition that the anti-peeping mode is started, the adjustment module 10 adjusts the reference potential of a first electrode and/or a second electrode in a pixel with a plurality of electrodes, otherwise, the reference potential of each electrode in the screen panel is adjusted according to actual display requirements; the functions of the adjusting module 10 and the driving module 20 are the same as those of the fourth embodiment of the present invention, and are not described in detail herein.
In actual use, whether the peeping-preventing mode needs to be started or not is detected through the detection module 30, in the normal display mode, no potential difference exists between the first electrode and the second electrode, and liquid crystals in the corresponding area cannot turn over, so that the light leakage phenomenon cannot be generated, the contrast ratio in large-angle viewing cannot be influenced, and the visual angle of the screen panel is larger; after the peeping prevention mode is started, light rays with large angles can pass through the color filter film area, so that the light leakage phenomenon is caused, the contrast ratio under the large angles is influenced, the visual angle of the screen panel is reduced, and the peeping prevention effect is achieved. Through the detection of whether the peep-proof mode is started or not, the potential difference does not need to exist between the first electrode and the second electrode under the condition that the peep-proof mode is not started, and the consumption of electric quantity is further reduced.
Specifically, the method for detecting whether the peep-proof mode is turned on by the detection module 30 may include, but is not limited to, one or more of the following ways: whether a user turns on a switch or a button of the peep-proof mode, whether the peep-proof mode is started in the setting, whether the turning-on time period is set for the peep-proof mode, and the like are detected. Further, when the peep-proof mode is not turned on and the reference potentials of the electrodes in the screen panel are adjusted according to actual display requirements, the reference potentials of the electrodes can be adjusted by the adjusting module 10.
A sixth embodiment of the present invention provides an electronic apparatus including the peep prevention device of the screen panel according to the fourth or fifth embodiment of the present invention.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents of the invention may be made by those skilled in the art within the spirit and scope of the invention, and such modifications and equivalents should also be considered as falling within the scope of the invention.
Claims (10)
1. A method of peeping prevention of a screen panel, comprising:
adjusting the reference potential of a first electrode and/or a second electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the first electrode and the reference potential of the second electrode to be a first preset potential difference;
driving the liquid crystal in the corresponding area between the first electrode and the second electrode to turn by using the first preset potential difference, so that light rays are emitted from the adjacent area of the corresponding area between the first electrode and the second electrode after passing through the turned liquid crystal;
the area between the first electrode and the second electrode corresponds to the black shading film, the adjacent area of the corresponding area between the first electrode and the second electrode is the area covered with the color filter film, the first electrode is adjacent to the second electrode, and the value of the first preset potential difference is within a first preset range.
2. The peeping prevention method according to claim 1, wherein after adjusting the reference potentials of the first electrode and the second electrode respectively to make the difference between the reference potential of the first electrode and the reference potential of the second electrode be a first preset potential difference, the peeping prevention method further comprises:
adjusting the reference potential of a third electrode and/or a fourth electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the third electrode and the reference potential of the first electrode to be a second preset potential difference, and the difference value between the reference potential of the fourth electrode and the reference potential of the second electrode to be a third preset potential difference;
wherein the third electrode is adjacent to the first electrode, the fourth electrode is adjacent to the second electrode, and a corresponding region between the third electrode and the first electrode and a corresponding region between the fourth electrode and the second electrode are both adjacent to a corresponding region between the first electrode and the second electrode; the second preset potential difference and the third preset potential difference are within a second preset range.
3. The peeping prevention method according to claim 1 or 2, wherein before the adjusting the reference potential of the first electrode and/or the second electrode in the pixel having the plurality of electrodes, further comprising:
detecting whether an anti-peeping mode is started or not;
in the case where the peep prevention mode is turned on, the reference potential of the first electrode and/or the second electrode in the pixel having the plurality of electrodes is adjusted.
4. The method according to claim 2, wherein the region between the third electrode and the first electrode and the region between the fourth electrode and the second electrode correspond to color filters.
5. The method according to claim 1, wherein said light rays passing through said inverted liquid crystal emerge from the vicinity of the corresponding region between said first and second electrodes, comprising:
after the light penetrates through the lower polarizer of the pixel, the light changes direction after passing through the turned liquid crystal and is emitted from the upper polarizer of the adjacent area of the corresponding area between the first electrode and the second electrode.
6. An anti-peeping device for a screen panel, comprising:
the adjusting module is used for adjusting the reference potential of a first electrode and/or a second electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the first electrode and the reference potential of the second electrode to be a first preset potential difference;
the driving module is used for driving the liquid crystal in the corresponding area between the first electrode and the second electrode to overturn by utilizing the first preset potential difference, so that light rays are emitted from the adjacent area of the corresponding area between the first electrode and the second electrode after passing through the overturned liquid crystal;
the area between the first electrode and the second electrode corresponds to the black shading film, the adjacent area of the corresponding area between the first electrode and the second electrode is the area covered with the color filter film, the first electrode is adjacent to the second electrode, and the value of the first preset potential difference is within a first preset range.
7. The peep prevention device of claim 6, wherein the adjustment module is further configured to:
adjusting the reference potential of a third electrode and/or a fourth electrode in a pixel with a plurality of electrodes to enable the difference value between the reference potential of the third electrode and the reference potential of the first electrode to be a second preset potential difference, and the difference value between the reference potential of the fourth electrode and the reference potential of the second electrode to be a third preset potential difference;
wherein the third electrode is adjacent to the first electrode, the fourth electrode is adjacent to the second electrode, and a corresponding region between the third electrode and the first electrode and a corresponding region between the fourth electrode and the second electrode are both adjacent to a corresponding region between the first electrode and the second electrode; the second preset potential difference and the third preset potential difference are within a second preset range.
8. The peep prevention device according to claim 6 or 7, further comprising:
the detection module is used for detecting whether the peep-proof mode is started or not;
in the case where the peep prevention mode is turned on, the adjustment module adjusts the reference potential of the first electrode and/or the second electrode in the pixel having the plurality of electrodes.
9. The privacy device of claim 7, wherein the region between the third electrode and the first electrode and the region between the fourth electrode and the second electrode correspond to color filters.
10. An electronic device characterized by a peep prevention device comprising the screen panel according to any one of claims 6 to 9.
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| TWI567722B (en) * | 2015-12-18 | 2017-01-21 | 友達光電股份有限公司 | Liquid crystal display apparatus and display method thereof |
| CN106646954B (en) * | 2017-03-02 | 2019-09-13 | 京东方科技集团股份有限公司 | A kind of peep-proof display and liquid crystal display device |
| CN107843993B (en) * | 2017-11-09 | 2020-01-10 | 维沃移动通信有限公司 | Control method for visual angle of display screen, mobile terminal and computer storage medium |
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