CN106249492A - Display device and method of work thereof - Google Patents

Abstract

The invention discloses a display device and a working method thereof. The display device includes a display panel and a first liquid crystal box, and the first liquid crystal box is arranged on the light-emitting side of the display panel. When the display device is in the private mode, the display panel adjusts the propagation direction of the incident light in real time according to the human eye tracking technology to form the display light. At this time, the first liquid crystal cell transmits the display light to ensure the The display light reaches the position of the human eye at a certain angle, thereby realizing precise control of the display light and achieving the purpose of anti-peeping; when the display device is in the shared mode, the working state of the display panel remains unchanged. The first liquid crystal cell scatters the display light with a fixed propagation direction in multiple angles, thereby realizing the purpose of viewing by multiple people.

Description

Display device and working method thereof

technical field

The present invention relates to the field of display technology, in particular to a display device and a working method thereof.

Background technique

In the field of display technology, users have higher and higher requirements for confidentiality when displaying information on a display device. When the existing display device displays information, not only the user can see the display screen of the display device, but also other people can see the display screen of the display device. Therefore, the existing display device has poor security. In addition, with the rapid development of display technology, display devices are widely used in various fields of life, and the application occasions of display devices are also becoming diversified. Therefore, the display mode of the existing security display device is relatively simple, which obviously cannot meet the diversified requirements of application scenarios.

Contents of the invention

In order to solve the above problems, the present invention provides a display device and its working method, which at least partially solve the problem that the existing display devices cannot meet the diverse requirements of application scenarios.

To this end, the present invention provides a display device, including a display panel and a first liquid crystal cell, and the first liquid crystal cell is arranged on the light-emitting side of the display panel;

The display panel is used to form display light according to the position of the human eye, and the propagation direction of the display light corresponds to the position of the human eye;

The first liquid crystal cell is used to transmit the display light when the first display mode is selected;

The first liquid crystal cell is used for scattering the display light when the second display mode is selected.

Optionally, the display panel includes a second liquid crystal cell, the second liquid crystal cell includes a first substrate and a second substrate, and a plurality of light adjustment units are arranged between the first substrate and the second substrate;

The light adjusting unit is used for converting incident light with a first direction into display light with a second direction according to the position of the human eye, and the second direction corresponds to the position of the human eye.

Optionally, the display panel further includes a collimated light source, the collimated light source is arranged on the light incident side of the second liquid crystal cell, and a polarizer is arranged between the collimated light source and the second liquid crystal cell ;

The collimated light source is used to provide collimated light to the display panel.

Optionally, the light adjusting unit includes a first planar electrode and a plurality of first strip electrodes, and a first liquid crystal layer is arranged between the first planar electrode and the first strip electrodes;

The first liquid crystal layer is used to form a prism structure according to the voltage difference between the first planar electrode and the first strip electrode;

The prism structure is used to form left-eye display light directed to the left eye and right-eye display light directed to the right eye according to the positions of human eyes.

Optionally, the prism structure includes a first prism and a second prism;

The first prism is used to transform the incident light into left-eye display light according to the position of the left eye, and the left-eye display light forms a left-eye image in the left eye;

The second prism is used to transform the incident light into right-eye display light according to the position of the right eye, and the right-eye display light forms a right-eye image in the right eye.

Optionally, the first liquid crystal cell and the second liquid crystal cell share the second substrate, the first liquid crystal cell includes a third substrate, and the second substrate and the third substrate are provided with a second planar electrode and a plurality of second strip electrodes, a second liquid crystal layer is arranged between the second planar electrode and the second strip electrodes;

The second liquid crystal layer is used to regularly arrange the liquid crystal molecules to transmit the display light when the first display mode is selected;

The second liquid crystal layer is used to arrange the liquid crystal molecules randomly to scatter the display light when the second display mode is selected.

The present invention also provides a working method of a display device. The display device includes a display panel and a first liquid crystal cell, and the first liquid crystal cell is arranged on the light-emitting side of the display panel;

The working method of the display device includes:

The display panel forms display light according to the position of the human eye, and the propagation direction of the display light corresponds to the position of the human eye;

When the first display mode is selected, the first liquid crystal cell transmits the display light;

When the second display mode is selected, the first liquid crystal cell scatters the display light.

Optionally, the display panel includes a second liquid crystal cell, the second liquid crystal cell includes a first substrate and a second substrate, and a plurality of light adjustment units are arranged between the first substrate and the second substrate;

The display panel forms display light according to the position of the human eye, and the step of the propagation direction of the display light corresponding to the position of the human eye includes:

The light adjusting unit transforms the incident light with a first direction into display light with a second direction according to the position of the human eye, and the second direction corresponds to the position of the human eye.

Optionally, the display panel further includes a collimated light source, the collimated light source is arranged on the light incident side of the second liquid crystal cell, and a polarizer is arranged between the collimated light source and the second liquid crystal cell ;

The light adjusting unit converts the incident light with the first direction into the display light with the second direction according to the position of the human eye, and the steps before the second direction corresponding to the position of the human eye include:

The collimated light source provides collimated light to the display panel.

Optionally, the light adjusting unit includes a first planar electrode and a plurality of first strip electrodes, and a first liquid crystal layer is arranged between the first planar electrode and the first strip electrodes;

The light adjusting unit transforms the incident light with a first direction into display light with a second direction according to the position of the human eye, and the step of the second direction corresponding to the position of the human eye includes:

The first liquid crystal layer forms a prism structure according to the voltage difference between the first planar electrode and the first strip electrode;

The prism structure forms left-eye display light directed to the left eye and right-eye display light directed to the right eye according to the positions of the human eyes.

The present invention has following beneficial effect:

In the display device and its working method provided by the present invention, the display device includes a display panel and a first liquid crystal cell, and the first liquid crystal cell is arranged on the light emitting side of the display panel. When the display device is in the private mode, the display panel adjusts the propagation direction of the incident light in real time according to the human eye tracking technology to form the display light. At this time, the first liquid crystal cell transmits the display light to ensure the The display light reaches the position of the human eye at a certain angle, thereby realizing precise control of the display light and achieving the purpose of anti-peeping; when the display device is in the shared mode, the working state of the display panel remains unchanged. The first liquid crystal cell scatters the display light with a fixed propagation direction in multiple angles, thereby realizing the purpose of viewing by multiple people.

Description of drawings

FIG. 1 is a schematic structural diagram of a display device provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of anti-peeping of the display device shown in FIG. 1;

3 is a schematic diagram of an optical path of the display device shown in FIG. 1 in a first display mode;

4 is a schematic diagram of an optical path of the display device shown in FIG. 1 in a second display mode;

FIG. 5 is a flowchart of a working method of a display device provided by Embodiment 2 of the present invention.

detailed description

In order to enable those skilled in the art to better understand the technical solution of the present invention, the display device and its working method provided by the present invention will be described in detail below with reference to the accompanying drawings.

Embodiment one

FIG. 1 is a schematic structural diagram of a display device provided by Embodiment 1 of the present invention. As shown in FIG. 1 , the display device includes a display panel 5 and a first liquid crystal cell 4 , and the first liquid crystal cell 4 is arranged on the light emitting side of the display panel 5 . The display panel 5 is used to form display light according to the position of the human eye, and the propagation direction of the display light corresponds to the position of the human eye.

The first liquid crystal cell 4 is used for transmitting the display light when the first display mode is selected. In this embodiment, the first display mode is the private mode. When the display device is in the private mode, the display panel 5 adjusts the propagation direction of the incident light in real time according to the human eye tracking technology, thereby forming the display light. At this time The first liquid crystal cell 4 transmits the display light to ensure that the display light reaches the position of the human eye at a certain angle, thereby realizing precise control of the display light and achieving the purpose of anti-peeping. The first liquid crystal cell 4 is used to scatter the display light when the second display mode is selected. In this embodiment, the second display mode is a sharing mode. When the display device is in the sharing mode, the working state of the display panel 5 remains unchanged, and at this time, the first pair of liquid crystal cells 4 has a fixed propagation direction The display light is scattered in multiple angles, so as to achieve the purpose of multi-person viewing.

1, the display panel 5 includes a second liquid crystal cell 3, the second liquid crystal cell 3 includes a first substrate 301 and a second substrate 302, and the first substrate 301 and the second substrate 302 are arranged between There are a plurality of light adjustment units 31 . The light adjusting unit 31 is used to transform the incident light with a first direction into display light with a second direction according to the position of the human eye, and the second direction corresponds to the position of the human eye. FIG. 2 is a schematic diagram of anti-peeping of the display device shown in FIG. 1 . As shown in FIG. 2 , the display panel 5 adjusts the propagating direction of the incident light in real time according to the human eye tracking technology, so as to form the display light. At a point in time or a period of time, this display light can only be directed to one position A, so only users at position A can receive these display lights, and people in other positions cannot receive these display lights, thus The precise control of display light is realized, and the purpose of anti-peeping is achieved.

In this embodiment, the display panel 5 further includes a collimated light source 1, the collimated light source 1 is arranged on the light-incident side of the second liquid crystal cell 3, and the collimated light source 1 and the second liquid crystal cell 3 is provided with a polarizer 2, the collimated light source 1 is used to provide collimated light to the display panel 5, and the light of the collimated light source is parallel to each other. Optionally, the collimated light includes red light, green light and blue light, and the red light, green light and blue light are respectively arranged corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel. The above-mentioned collimated light rays of various colors are refracted by the light adjustment unit 31 to form outgoing light rays. In this embodiment, by controlling the energy distribution ratio of the above-mentioned outgoing light rays within the preset viewing angle range, the brightness within the preset viewing angle range is controlled. , and then realize the grayscale display.

Referring to FIG. 1 , the light adjusting unit 31 includes a first planar electrode 305 and a plurality of first strip electrodes 304 , and a first Liquid crystal layer 303 . The first liquid crystal layer 303 is used to form a prism structure according to the voltage difference between the first planar electrode 305 and the first strip electrode 304, and the prism structure is used to form a left-directed The left eye of the eye shows light, and the right eye shows light going to the right eye. Preferably, the prism structure includes a first prism and a second prism, the first prism is used to transform the incident light into the display light for the left eye according to the position of the left eye, and the display light for the left eye forms a left eye in the left eye. The eye image, the second prism is used to transform the incident light into the right eye display light according to the position of the right eye, and the right eye display light forms a right eye image in the right eye. Therefore, the technical solution provided by this embodiment can realize glasses-free 3D.

FIG. 3 is a schematic diagram of an optical path of the display device shown in FIG. 1 in a first display mode. As shown in FIG. 3 , the display device is in a private display mode, the prism structure m in the second liquid crystal cell 3 includes a first prism m1 and a second prism m2, and the first liquid crystal cell 4 transmits display light. The first prism m1 transforms the incident light into the display light for the right eye according to the position of the right eye, and the second prism m2 transforms the incident light into the display light for the left eye according to the position of the left eye. Similarly, the prism structure n in the second liquid crystal cell 3 includes a first prism n1 and a second prism n2, the first prism n1 transforms the incident light into the display light for the right eye according to the position of the right eye, and the second prism n2 converts the incident light to the left eye display light according to the position of the left eye. The right-eye display light formed in this embodiment forms a right-eye image in the right eye, and the left-eye display light forms a left-eye image in the left eye, and finally the right-eye image and the left-eye image form a three-dimensional image in the user's brain. Thereby naked-eye 3D display is realized.

FIG. 4 is a schematic diagram of an optical path of the display device shown in FIG. 1 in a second display mode. As shown in FIG. 4 , the prism structure m in the second liquid crystal cell 3 includes a first prism m1 and a second prism m2 , and the prism structure n in the second liquid crystal cell 3 includes a first prism n1 and a second prism n2 . 1 and 4, the first liquid crystal cell 4 and the second liquid crystal cell 3 share a second substrate 302, the first liquid crystal cell 4 includes a third substrate 306, and the second substrate 302 and the second liquid crystal cell 3 share a second substrate 302. A second planar electrode 309 and a plurality of second strip electrodes 308 are arranged between the third substrate 306, and a second liquid crystal layer 307 is arranged between the second planar electrode 309 and the second strip electrodes 308 . When the private display mode is selected, the liquid crystal molecules of the second liquid crystal layer 307 are regularly arranged to transmit display light. The display device in FIG. 4 is in the shared display mode, and at this time, the liquid crystal molecules of the second liquid crystal layer 307 are randomly arranged for scattering display light. That is to say, the working state of the display panel 5 remains unchanged, and the first liquid crystal cell 4 scatters the display light with a fixed propagation direction in multiple angles, thereby achieving the purpose of viewing by multiple people.

In this embodiment, the liquid crystals in the first liquid crystal cell 4 are multi-stable liquid crystals. Preferably, the liquid crystals in the first liquid crystal cell 4 are polymer dispersed liquid crystals. When the display device is in the sharing mode, in order to reduce the power consumption of the display device, the liquid crystal in the first liquid crystal cell 4 can be selected as a multi-stable liquid crystal, which can maintain the state before the voltage is removed without voltage maintenance. In addition, in order to achieve a better scattering effect, the liquid crystal in the first liquid crystal cell 4 may be selected as polymer dispersed liquid crystal (Polymer Dispersed Liquid Crystal, PDLC).

The display device provided in this embodiment includes a display panel and a first liquid crystal cell, and the first liquid crystal cell is arranged on the light emitting side of the display panel. When the display device is in the private mode, the display panel adjusts the propagation direction of the incident light in real time according to the human eye tracking technology to form the display light. At this time, the first liquid crystal cell transmits the display light to ensure the The display light reaches the position of the human eye at a certain angle, thereby realizing precise control of the display light and achieving the purpose of anti-peeping; when the display device is in the shared mode, the working state of the display panel remains unchanged. The first liquid crystal cell scatters the display light with a fixed propagation direction in multiple angles, thereby realizing the purpose of viewing by multiple people.

Embodiment two

FIG. 5 is a flowchart of a working method of a display device provided by Embodiment 2 of the present invention. Referring to FIG. 1 and FIG. 5 , the display device includes a display panel 5 and a first liquid crystal cell 4 , and the first liquid crystal cell 4 is arranged on the light emitting side of the display panel 5 .

The working method of the display device includes:

Step 1001, the display panel forms a display light according to the human eye tracking technology, and the propagation direction of the display light corresponds to the position of the human eye.

1, the display panel 5 includes a second liquid crystal cell 3, the second liquid crystal cell 3 includes a first substrate 301 and a second substrate 302, and the first substrate 301 and the second substrate 302 are arranged between There are a plurality of light adjustment units 31 . The display panel forms display light according to the position of the human eye, and the step of the propagation direction of the display light corresponding to the position of the human eye includes: the light adjusting unit transforms the incident light with the first direction into a light with the first direction according to the position of the human eye. Display light in a second direction, where the second direction corresponds to the position of the human eye. Referring to FIG. 2 , the display panel 5 adjusts the propagating direction of the incident light in real time according to the human eye tracking technology, so as to form the display light. At a point in time or a period of time, this display light can only be directed to one position A, so only users at position A can receive these display lights, and people in other positions cannot receive these display lights, thus The precise control of display light is realized, and the purpose of anti-peeping is achieved.

In this embodiment, the display panel 5 further includes a collimated light source 1, the collimated light source 1 is arranged on the light-incident side of the second liquid crystal cell 3, and the collimated light source 1 and the second liquid crystal cell A polarizer 2 is arranged between the 3. The light adjusting unit transforms the incident light with the first direction into the display light with the second direction according to the position of the human eye, and the second direction corresponds to the position of the human eye. The display panel provides collimated light. Optionally, the collimated light includes red light, green light and blue light, and the red light, green light and blue light are respectively arranged corresponding to the red sub-pixel, the green sub-pixel and the blue sub-pixel.

Referring to FIG. 1 , the light adjusting unit 31 includes a first planar electrode 305 and a plurality of first strip electrodes 304 , and a first Liquid crystal layer 303 . The light adjusting unit transforms the incident light with a first direction into display light with a second direction according to the position of the human eye, and the step of the second direction corresponding to the position of the human eye includes: the first liquid crystal layer according to The voltage difference between the first planar electrode and the first strip electrode forms a prism structure; the prism structure forms left-eye display light directed to the left eye and right-eye display light directed to the right eye according to the position of the human eye. The eye shows light. Preferably, the prism structure forms the left-eye display light directed to the left eye according to the position of the human eye, and the step of forming the right-eye display light directed to the right eye includes: the first prism converts the incident light into The left eye displays the light, and the left eye displays the light to form a left eye image in the left eye; the second prism converts the incident light into the right eye display light according to the position of the right eye, and the right eye displays the light between the right eye Form the image for the right eye.

Step 1002, when the first display mode is selected, the first liquid crystal cell transmits the display light.

In this embodiment, the first display mode is the private mode. When the display device is in the private mode, the display panel 5 adjusts the propagation direction of the incident light in real time according to the human eye tracking technology, thereby forming the display light. At this time The first liquid crystal cell 4 transmits the display light to ensure that the display light reaches the position of the human eye at a certain angle, thereby realizing precise control of the display light and achieving the purpose of anti-peeping.

Referring to FIG. 3 , the display device is in a private display mode, the prism structure m in the second liquid crystal cell 3 includes a first prism m1 and a second prism m2, and the first liquid crystal cell 4 transmits display light. The first prism m1 transforms the incident light into the display light for the right eye according to the position of the right eye, and the second prism m2 transforms the incident light into the display light for the left eye according to the position of the left eye. Similarly, the prism structure n in the second liquid crystal cell 3 includes a first prism n1 and a second prism n2, the first prism n1 transforms the incident light into the display light for the right eye according to the position of the right eye, and the second prism n2 converts the incident light to the left eye display light according to the position of the left eye. The right-eye display light formed in this embodiment forms a right-eye image in the right eye, and the left-eye display light forms a left-eye image in the left eye, and finally the right-eye image and the left-eye image form a three-dimensional image in the user's brain. Thereby naked-eye 3D display is realized.

Step 1003, when the second display mode is selected, the first liquid crystal cell scatters the display light.

In this embodiment, the second display mode is a sharing mode. When the display device is in the sharing mode, the working state of the display panel 5 remains unchanged, and at this time, the first pair of liquid crystal cells 4 has a fixed propagation direction The display light is scattered in multiple angles, so as to achieve the purpose of multi-person viewing.

Referring to FIG. 4 , the prism structure m in the second liquid crystal cell 3 includes a first prism m1 and a second prism m2 , and the prism structure n in the second liquid crystal cell 3 includes a first prism n1 and a second prism n2 . 1 and 4, the first liquid crystal cell 4 and the second liquid crystal cell 3 share a second substrate 302, the first liquid crystal cell 4 includes a third substrate 306, and the second substrate 302 and the second liquid crystal cell 3 share a second substrate 302. A second planar electrode 309 and a plurality of second strip electrodes 308 are arranged between the third substrate 306, and a second liquid crystal layer 307 is arranged between the second planar electrode 309 and the second strip electrodes 308 . When the private display mode is selected, the liquid crystal molecules of the second liquid crystal layer 307 are regularly arranged to transmit display light. The display device in FIG. 4 is in the shared display mode, and at this time, the liquid crystal molecules of the second liquid crystal layer 307 are randomly arranged for scattering display light. That is to say, the working state of the display panel 5 remains unchanged, and the first liquid crystal cell 4 scatters the display light with a fixed propagation direction in multiple angles, thereby achieving the purpose of viewing by multiple people.

In the working method of the display device provided in this embodiment, the display device includes a display panel and a first liquid crystal cell, and the first liquid crystal cell is arranged on the light emitting side of the display panel. When the display device is in the private mode, the display panel adjusts the propagation direction of the incident light in real time according to the human eye tracking technology to form the display light. At this time, the first liquid crystal cell transmits the display light to ensure the The display light reaches the position of the human eye at a certain angle, thereby realizing precise control of the display light and achieving the purpose of anti-peeping; when the display device is in the shared mode, the working state of the display panel remains unchanged. The first liquid crystal cell scatters the display light with a fixed propagation direction in multiple angles, thereby realizing the purpose of viewing by multiple people.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (10)

1. a display device, it is characterised in that include that display floater and the first liquid crystal cell, described first liquid crystal cell are arranged on institute State the light emission side of display floater；

Described display floater is for forming display light, the direction of propagation of described display light and described human eye according to position of human eye Position is corresponding；

Described first liquid crystal cell is for carrying out transmission when selecting the first display pattern to described display light；

Described first liquid crystal cell is for being scattered described display light when selecting the second display pattern.

Display device the most according to claim 1, it is characterised in that described display floater includes the second liquid crystal cell, described Second liquid crystal cell includes first substrate and second substrate, is provided with multiple light between described first substrate and described second substrate Regulation unit；

Described light regulation unit has second party for being changed into by the incident ray with first direction according to position of human eye To display light, described second direction is corresponding with described position of human eye.

Display device the most according to claim 2, it is characterised in that described display floater also includes collimated light source, described Collimated light source is arranged on the incident side of described second liquid crystal cell, is provided with partially between described collimated light source and described second liquid crystal cell Mating plate；

Described collimated light source is for providing collimated ray to described display floater.

Display device the most according to claim 2, it is characterised in that described light regulation unit includes the first plane-shape electrode With multiple first strip shaped electric poles, between described first plane-shape electrode and described first strip shaped electric poles, it is provided with the first liquid crystal layer；

Described first liquid crystal layer is for being formed according to the voltage difference between described first plane-shape electrode and described first strip shaped electric poles Prism structure；

Described prism structure for forming the display light of directive human eye according to position of human eye.

Display device the most according to claim 4, it is characterised in that described prism structure includes the first prism and the second rib Mirror；

Described first prism for being changed into the display light of directive left eye according to left eye position by incident ray；

Described second prism for being changed into the display light of directive right eye according to right eye position by incident ray.

Display device the most according to claim 2, it is characterised in that described first liquid crystal cell is with described second liquid crystal cell altogether Use described second substrate, described first liquid crystal cell to include the 3rd substrate, arrange between described second substrate and described 3rd substrate There are the second plane-shape electrode and multiple second strip shaped electric poles, are provided with between described second plane-shape electrode and described second strip shaped electric poles Second liquid crystal layer；

Described second liquid crystal layer is regularly arranged for the liquid crystal molecule when selecting the first display pattern, shows light with described in transmission Line；

Described second liquid crystal layer is for the random arrangement of liquid crystal molecule when selecting the second display pattern, to scatter described display light Line.

7. the method for work of a display device, it is characterised in that described display device includes display floater and the first liquid crystal cell, Described first liquid crystal cell is arranged on the light emission side of described display floater；

The method of work of described display device includes:

Described display floater forms display light, the direction of propagation of described display light and described position of human eye according to position of human eye Corresponding；

When selecting the first display pattern, described first liquid crystal cell carries out transmission to described display light；

When selecting the second display pattern, described display light is scattered by described first liquid crystal cell.

The method of work of display device the most according to claim 7, it is characterised in that described display floater includes the second liquid Brilliant box, described second liquid crystal cell includes first substrate and second substrate, arranges between described first substrate and described second substrate Multiple light is had to regulate unit；

Described display floater forms display light, the direction of propagation of described display light and described position of human eye according to position of human eye Corresponding step includes:

The incident ray with first direction is changed into according to position of human eye and has second direction by described light regulation unit Display light, described second direction is corresponding with described position of human eye.

The method of work of display device the most according to claim 8, it is characterised in that described display floater also includes collimation Light source, described collimated light source is arranged on the incident side of described second liquid crystal cell, described collimated light source and described second liquid crystal cell it Between be provided with polaroid；

The incident ray with first direction is changed into according to position of human eye and has second direction by described light regulation unit Display light, includes before the step that described second direction is corresponding with described position of human eye:

Described collimated light source provides collimated ray to described display floater.

The method of work of display device the most according to claim 8, it is characterised in that described light regulation unit includes First plane-shape electrode and multiple first strip shaped electric poles, be provided with between described first plane-shape electrode and described first strip shaped electric poles One liquid crystal layer；

The incident ray with first direction is changed into according to position of human eye and has second direction by described light regulation unit Display light, the described second direction step corresponding with described position of human eye includes:

Described first liquid crystal layer forms prism according to the voltage difference between described first plane-shape electrode and described first strip shaped electric poles Structure；

Described prism structure forms the left eye display light of directive left eye according to position of human eye, and the right eye of directive right eye shows Light.