Display device and display device control method

Abstract

A display device is provided. The display device includes a display module and a privacy module. The display module includes a light source that emits an input light. The privacy module is disposed on the display module and configured to receive the input light. The privacy module includes a first polarization component configured to absorb light in a predetermined direction.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a display device, and more particularly, to a display device having a privacy module. BACKGROUND

[0002] Display devices are commonly used in various electronic devices or mobile devices. Currently, some display devices can have a function of adjusting a viewable angle to reduce the angle at which the screen (displayed by the display device) can be seen by others, thereby helping to protect the privacy of the user.

[0003] Recently, privacy displays have been developed for various uses, such as for automobile displays, notebook computer displays, personal computer (PC) displays, automated teller machine (ATM) displays, etc. Current privacy displays make the displayed image unreadable from the left and right directions.

[0004] However, the existing display devices can only implement a privacy mode for a specific direction of the display device. When the display device is rotated, the display device cannot protect the privacy of the user and cannot meet the privacy needs of the user. For example, a mobile device (e.g., a tablet computer, a two-in-one computer, a smart phone, etc., but not limited thereto) can be used in a landscape mode and a portrait mode. In this case, the current privacy function is not sufficient.

[0005] Although a whole direction privacy function device can be used, the narrow backlight distribution backlight design is difficult and power consuming. In a sharing mode, the brightness of the whole direction privacy function device is too high; and in a privacy mode, the brightness of the whole direction privacy function device is too dark. Although a dual backlight system can be used, the design of the transparent backlight is difficult and the brightness is low. In a sharing mode, the brightness of the dual backlight system is too high; and in a privacy mode, the brightness of the dual backlight system is too dark.

[0006] Therefore, it is an important subject to find a solution to the above problems. SUMMARY

[0007] A display device includes a display module and a privacy module. The display module includes a light source that emits an input light. The privacy module is disposed on the display module and is configured to receive the input light. The privacy module includes a first polarization component configured to absorb light of a predetermined direction.

[0008] A display device control method includes providing a display device including a light adjuster; determining an operational mode of the display device; sensing an orientation mode of the display device; and controlling the light adjuster based on the operational mode and the orientation mode of the display device. BRIEF DESCRIPTION OF DRAWINGS

[0009] The present disclosure can be more fully understood by reading the following detailed description together with the accompanying drawings, and the examples discussed below.

[0010] Figure 1 A schematic diagram of a display device according to some embodiments of the present disclosure is shown.

[0011] Figure 2A A cross-sectional view of a first polarization component according to some embodiments of the present disclosure is shown.

[0012] Figure 2B A schematic diagram of a light absorbing dye of a first polarization component according to some embodiments of the present disclosure is shown.

[0013] Figure 3A A schematic diagram of an illustrative process of input light, absorbed light, and output light according to some embodiments of the present disclosure is shown.

[0014] Figure 3B A schematic diagram illustrating a central polarization direction of central output light and a tilt polarization direction of tilted output light according to some embodiments of the present disclosure.

[0015] Figure 3C An illustrative schematic diagram of a tilt polarization direction of tilted output light according to some embodiments of the present disclosure.

[0016] Figure 4 A schematic diagram of an illustrative process of central light incident on a light adjuster according to some embodiments of the present disclosure is shown.

[0017] Figure 5 An exemplary embodiment of a display device according to some embodiments of the present disclosure is shown.

[0018] Figure 6A A top view of a display device according to some embodiments of the present disclosure is shown.

[0019] Figure 6B A top view of a display device according to some embodiments of the present disclosure is shown.

[0020] Figure 6C A top view of a display device is shown in accordance with some embodiments of the disclosure.

[0021] Figure 6D A top view of a display device is shown in accordance with some embodiments of the disclosure.

[0022] Figure 7A A flowchart of a display device control method in accordance with some embodiments of the disclosure.

[0023] Figure 7B A flowchart of a display device control method in accordance with some embodiments of the disclosure.

[0024] Figure 8A Some example embodiments of configurations of display devices are illustrated.

[0025] Figure 8B Some example embodiments of configurations of display devices are illustrated.

[0026] Figure 8C Some example embodiments of configurations of display devices are illustrated.

[0027] Figure 8D Some example embodiments of configurations of display devices are illustrated.

[0028] Reference Signs

[0029] 100: display device

[0030] A: side, position

[0031] B: side, position

[0032] C: side, position

[0033] D: side, position

[0034] E: position

[0035] OLA: output light

[0036] OLB: output light

[0037] OLE: output light

[0038] 10: display module

[0039] 11: light source

[0040] 12: liquid crystal panel

[0041] 13: front light

[0042] 20: privacy module

[0043] 20S: output surface

[0044] 21: first polarization component

[0045] 21S: output surface

[0046] 22: light conditioner

[0047] 23: second polarization component

[0048] 23S: output surface

[0049] 100: display device

[0050] 100S: output surface

[0051] 121: display module polarization component

[0052] 122: liquid crystal cell

[0053] 211: light absorbing dye

[0054] 212: liquid crystal

[0055] 221: light twist component

[0056] 211a: longitudinal axis

[0057] 212a: major axis

[0058] 222a: first electrode

[0059] 222b: second electrode

[0060] A: side position

[0061] B: side position

[0062] C: side position

[0063] D: side position

[0064] E: position

[0065] L210: loop

[0066] L212: loop

[0067] M200: device control method

[0068] M300: display device control method

[0069] S1: side

[0070] S2: side

[0071] S3: side

[0072] S4: side

[0073] S202: Step

[0074] S204: Step

[0075] S206: Step

[0076] S208: Step

[0077] S302: Step

[0078] S304: Step

[0079] S306: Step

[0080] S308: Step

[0081] S2081: Step

[0082] S2082: Step

[0083] S2083: Step

[0084] S2084: Step

[0085] AL: light ray

[0086] CL: input light, central light

[0087] CL': polarization direction

[0088] ID: direction of travel

[0089] IL: input light

[0090] MA: adjustment axis

[0091] OA: optical axis

[0092] OL: output light

[0093] AIL: tilted input light

[0094] AML: tilted adjustment light

[0095] AOL: tilted output light

[0096] AOL': tilted polarization direction

[0097] APL: tilted polarized light

[0098] CIL: vertical input light

[0099] CML: vertical adjustment light, central adjustment light

[0100] CML': polarization direction

[0101] COL: vertical output light

[0102] COL': vertically polarized direction

[0103] CPL: vertically polarized light, center polarized light

[0104] OLA: output light

[0105] OLB: output light

[0106] OLC: output light

[0107] OLE: output light

[0108] OLF: output light DETAILED DESCRIPTION

[0109] The present disclosure can be more completely understood in consideration of the following detailed description in connection with the accompanying drawings, in which like reference numerals designate similar, or corresponding, elements in the figures, and in which: it is to be understood that the figures included in the drawings are illustrative and are not necessarily drawn to scale, the embodiments are intended to illustrate major

[0110] Throughout this specification and the claims, certain words are used to connote the existence of one or more elements high-tech noun. The skilled person in the art will appreciate that electronic device manufacturers can use different names to refer to the same component. It is not intended to distinguish between components with the same function but different names. In the following description and claims, the words "comprise", "contain", "have" and the like are open-ended words, thus they are to be interpreted to mean "including, but not limited to,...". It will be understood by those within the art that any term used herein in connection with the description of the present disclosure should be interpreted under its broadest applicable meaning.

[0111] In addition, relative terms can be used in the embodiments, such as "lower" or "bottom" and "upper" or "top", which can be used to describe one component's or feature's relationship to another component or feature as the spatial relationship is depicted in the figures. It will be understood that if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features.

[0112] When a corresponding component (e.g., an assembly or a film layer or a region) is referred to as "on" or "connected to" another component, it can be directly on or connected to the other component, or one or more intervening components can be present. On the other hand, when a component is referred to as being "directly on" or "directly connected to" another component, then there are no intervening components present. Also, when a component is referred to as being "on" another component, it can be on top of or below the other component in terms of plan view, and the relative positioning depends on the orientation of the device.

[0113] The terms "about," "equal," "equivalent," or "substantially" or "approximately" are generally interpreted as within 20% of a given value or range, or within 10%, 5%, 3%, 2%, 1%, or 0.5% of a given value or range.

[0114] It is to be understood that, although the terms "first", "second", etc. can be used herein to describe various components, layers and / or sections, these components, layers and / or sections should not be limited by these terms. These terms are only used to distinguish one component, layer or section from another. Thus, a first component, layer or section discussed below could be termed a second component, layer or section without departing from the teachings of some embodiments of the present disclosure. Additionally, use of "first", "second", etc. in the description is not meant to denote a particular order or sequence, but rather is used to distinguish one component, layer or section from another. Thus, a first component, layer or section discussed below could be termed a second component, layer or section without departing from the teachings of some embodiments of the present disclosure.

[0115] In the present disclosure, the measurement of thickness, length and width can be obtained by optical microscope measurement, and the thickness can be measured by cross-sectional image in electron microscope, but not limited thereto. In addition, there can be a certain error between any two values or directions used for comparison. If a first value is equal to a second value, it implies that there can be about 10% error between the first value and the second value; if a first direction is perpendicular to a second direction, the angle between the first direction and the second direction can be between 80 degrees and 100 degrees; if a first direction is parallel to a second direction, the angle between the first direction and the second direction can be between 0 degrees and 10 degrees.

[0116] It should be noted that the technical solutions provided by different embodiments below can be used in combination or mixed with each other to constitute another embodiment without violating the spirit of the present disclosure.

[0117] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0118] Referring to Figure 1 , a schematic diagram of a display device 100 is shown, in accordance with some embodiments of the present disclosure. In some embodiments, the display device 100 can be a monitor, a touch display, a curved display, a free shape display, etc., but is not limited thereto. In some embodiments, the display device 100 can be installed in an electronic device, such as a smartphone or a tablet computer, etc., but is not limited thereto.

[0119] Referring to Figure 1 , the display device 100 can include a display module 10 and a privacy module 20. The privacy module 20 can be disposed on the display module 10. The display module 10 can include a light source 11 that emits input light IL to the privacy module 20, and the privacy module 20 receives the input light IL. The privacy module 20 can include a first polarization component 21 for absorbing light in a predetermined direction. In some embodiments, the predetermined direction can be any direction that is not parallel to an optical axis OA of the display device 100. As shown in Figure 1 , in some embodiments, the optical axis OA can be perpendicular to an output surface 100S of the display device 100 (from which light exits the display device 100). As shown in Figure 1 , in some embodiments, the optical axis OA can be perpendicular to an output surface 20S of the privacy module 20 (from which light exits the privacy module 20). In some embodiments, the first polarization component 21 is a top component of the privacy module 20, and the optical axis OA can be perpendicular to an output surface 21S of the first polarization component 21. In Figure 1 , the optical axis OA can be parallel to the Z-axis.

[0120] In some embodiments, the privacy module 20 is configured to receive the input light IL to produce an output light OL on an output surface 100S of the display device 100. For example, as shown in Figure 1 , the output surface 100S is a face parallel to the X-Y plane. For example, as shown in Figure 1As shown, the optical axis OA is parallel to the Z-axis. The input light IL includes a perpendicular input light CIL parallel to the optical axis OA and a tilted input light AIL not parallel to the optical axis OA. In some embodiments, the privacy module 20 includes a first polarization component 21. Figure 3B As shown, the vertically input light CIL is not polarized by the first polarization component 21, while the tilted input light AIL is polarized by the first polarization component 21. A detailed description of the first polarization component 21 will be provided in later paragraphs.

[0121] In some embodiments, the output surface 100S of the display device 100 may be the outermost surface of the display device 100. For example, in Figure 1 In this configuration, the first polarization component 21 is the top component of the privacy module 20. For example, in... Figure 1 Although not shown as a surface, output surface 100S could be the output surface 20S of privacy module 20. For example, in Figure 1 Although not shown as a single surface, the output surface 20S could also be the output surface 21S of the first polarization component 21. Figure 1 Although not displayed as a single surface, output surface 100S, output surface 20S, and output surface 21S can be considered as the same surface.

[0122] like Figure 1 As shown, in some embodiments, the privacy module 20 may include a first polarization component 21, a light modulator 22, and a second polarization component 23. The light modulator 22 may be disposed between the first polarization component 21 and the second polarization component 23, wherein the second polarization component 23 has an output surface 23S. However, please note... Figure 1 The configuration of privacy module 20 shown is merely an exemplary embodiment of this disclosure, and further examples of the configuration of privacy module 20 will be described and illustrated below. Figure 1 In the middle, the second polarization component 23 is disposed between the light adjuster 22 and the display module 10.

[0123] Still referencing Figure 1According to some embodiments (not shown), the positions of the first polarizing component 21 and the second polarizing component 23 can be interchanged, i.e., the first polarizing component 21 can be disposed between the light adjuster 22 and the display module 10. In some embodiments, the second polarizing component 23 is a top component of the privacy module 20. For example, the output surface 100S of the display device 100 can be the output surface 20S of the privacy module 20. For example, the output surface 20S can be the output surface 23S of the second polarizing component 23. For example, the output surface 100S, the output surface 20S, and the output surface 23S can be considered as the same surface. In embodiments where the second polarizing component 23 is a top component of the privacy module 20, the optical axis OA can be perpendicular to the output surface 23S of the second polarizing component 23.

[0124] Please refer to Figure 1 The vertical input light CIL is incident on the privacy module 20 from the light source 11, and the vertical input light CIL is on the optical axis OA and the vertical input light CIL is parallel to the optical axis OA. The vertical input light CIL passes through the second polarizing component 23, and the vertical input light CIL is polarized into vertical polarized light CPL. The vertical polarized light CPL is converted into vertical adjusted light CML after passing through the light adjuster 22. The vertical adjusted light CML is converted into vertical output light COL after passing through the first polarizing component 21.

[0125] The oblique input light AIL is incident on the privacy module 20 from the light source 11, and the oblique input light AIL is not parallel to the optical axis OA. The oblique input light AIL passes through the second polarizing component 23, and the oblique input light AIL is polarized into oblique polarized light APL. The oblique polarized light APL is converted into oblique adjusted light AML after passing through the light adjuster 22. The oblique adjusted light AML passing through the light adjuster 22 is called oblique output light AOL.

[0126] Please refer to Figure 2A and Figure 2B . Figure 2A A cross-sectional view of the first polarizing component 21 is shown according to some embodiments of the present disclosure. The first polarizing component 21 can include a light absorbing dye 211 and a liquid crystal 212. The light absorbing dye 211 can include a dichroic dye. Figure 2B A schematic view of the light absorbing dye 211 is shown. The first polarizing component 21 can absorb light according to the direction of travel ID of the light. The direction of travel ID is the direction in which the light travels, which is shown in Figure 3CIn some embodiments, the first polarization component 21 may be (or may be referred to as) a light control film or an advanced light control film.

[0127] like Figure 2A and Figure 2B As shown, in some embodiments, the cross-section of the light-absorbing dye 211 can be elliptical. That is, the light-absorbing dye 211 can have an ellipsoidal shape. The light-absorbing dye 211 can have a longitudinal axis (or principal axis) 211a. The principal axis 211a is the major axis of the light-absorbing dye 211, and the principal axis 211a passes through the focal point (not shown) of the ellipsoid (light-absorbing dye 211). According to some embodiments, in the display device 100, the first polarization component 21 can be configured such that the longitudinal axis 211a of the light-absorbing dye 211 is parallel to the optical axis OA. For example, the longitudinal axis 211a of the light-absorbing dye 211 is parallel to the Z-axis.

[0128] In some embodiments, the cross-section of the liquid crystal 212 may be elliptical. That is, the liquid crystal 212 may have an ellipsoidal shape. The liquid crystal 212 may have a principal axis 212a. The principal axis 212a is the major axis of the liquid crystal 212, and the principal axis 212a passes through the focal point (not shown) of the ellipsoid (liquid crystal 212).

[0129] Please refer to Figure 2B The diagram illustrates a ray AL with an adjustment axis MA, which is parallel to the Z-axis. The adjustment axis MA is parallel to the longitudinal axis 211a of the light-absorbing dye 211. Therefore, in some embodiments, the light-absorbing dye 211 can absorb the ray AL with the adjustment axis MA, which is parallel to the longitudinal axis 211a of the light-absorbing dye 211. However, light rays whose adjustment axis is not parallel to the longitudinal axis 211a of the light-absorbing dye 211 will not be absorbed. In other words, light rays whose adjustment axis is not parallel to the major axis 211a of the light-absorbing dye 211 can pass through the first polarizing component 21.

[0130] Please refer to Figure 2A The direction of the light-absorbing dye 211 (i.e., the direction of the principal axis 211a of the light-absorbing dye 211) is controlled by the liquid crystal 212. In some embodiments, the light-absorbing dye 211 is aligned with the liquid crystal 212 such that the principal axis 211a is substantially parallel to the optical axis OA. In some embodiments, both the principal axis 211a of the light-absorbing dye 211 and the principal axis 212a of the liquid crystal 212 are substantially parallel to the optical axis OA.

[0131] Please refer to Figure 3AThis diagram illustrates an input light passing through a first polarization component 21 according to some embodiments of the present disclosure. In some embodiments, the light incident from the light source 11 may be referred to as the input light IL. The light passing through the first polarization component 21 may be referred to as the output light OL.

[0132] like Figure 3A As shown, the input light IL may include a vertical input light CIL and multiple tilted input lights AIL, and the output light OL may include a vertical output light COL and multiple tilted output lights AOL. The vertical input light CIL and the vertical output light COL are parallel to the optical axis of the display device 100 (or perpendicular to the output surface 21S of the first polarization component 21), while the tilted input light AIL and the tilted output light AOL are not parallel to the optical axis of the display device 100.

[0133] like Figure 2B As described above, light rays with a predetermined adjustment axis MA will be absorbed by the first polarization component 21. Figure 3B and Figure 3C As shown, the polarization direction of the output light varies depending on the observation position. For example, the tilted polarization direction AOL' of the tilted output light AOL depends on the observation position of the tilted output light AOL. Specifically, a portion of the tilted input light AIL is absorbed by the first polarization component 21, and a portion of the tilted input light AIL passes through the first polarization component 21; the portion that passes through is called the tilted output light AOL. Please refer to... Figure 3B The output surface 21S (XY plane) of the first polarization component 21 may include four sides S1, S2, S3, and S4. Sides S1 and S3 are parallel to the Y-axis, and sides S2 and S4 are parallel to the X-axis. Furthermore, taking light observed from the side positions as an example, the effect of the first polarization component 21 on the tilted input light AIL will be explained in more detail. In some embodiments, light with a predetermined adjustment axis MA parallel to the longitudinal axis 211a (for example, parallel to the Z-axis) will be absorbed by a light-absorbing dye 211 having a longitudinal axis 211a. See also... Figure 3A and Figure 3B As shown, in the observation position from side S1, light rays with a predetermined adjustment axis MA parallel to the vertical axis 211a (for example, parallel to the Z-axis) will be absorbed, and therefore, the polarization direction of the output light AOL at side S1 (indicated by a double arrow) is parallel to the Y-axis.

[0134] Likewise, in the observation position from side S2, light rays having the predetermined adjustment axis MA parallel to the longitudinal axis 211a (e.g., parallel to the Z-axis) are absorbed, and thus the polarization direction (indicated by double arrows) of the output light AOL from side S2 is parallel to the X-axis. Further, in the observation position from side S3, light rays having the predetermined adjustment axis MA parallel to the longitudinal axis 211a (e.g., parallel to the Z-axis) will be absorbed, and thus the polarization direction (indicated by double arrows) of the output light AOL from side S3 is parallel to the Y-axis. In addition, in the observation position from side S4, light rays having the predetermined adjustment axis MA parallel to the longitudinal axis 211a (e.g., parallel to the Z-axis) are absorbed, and thus the polarization direction (indicated by double arrows) of the output light AOL from side S4 is parallel to the X-axis.

[0135] Thus, in the observation position from the other side of the output surface 21S of the first polarization component 21, light rays having the predetermined adjustment axis MA parallel to the longitudinal axis 211a are also absorbed, and the relevant description is omitted for the sake of brevity. In this way, the oblique input light AIL, which is not parallel to the optical axis OA, is polarized by the first polarization component 21.

[0136] Further reference is made to Figure 3A and Figure 3B On the other hand, in the observation position from the output surface 21S of the first polarization component 21, light rays are not absorbed by the first polarization component 21. In other words, the normal input light CIL, which is parallel to the optical axis OA, is not polarized. Thus, the normal input light CIL is not polarized by the first polarization component 21. In other words, light rays having the direction of travel ID parallel to the optical axis are not absorbed or not polarized. That is, the normal input light CIL, which is parallel to the optical axis, passes through the first polarization component 21 and is referred to as normal output light COL. The normal polarization direction COL' of the normal output light COL can be any direction. Note that the four double arrows on the output surface 21 indicate that the normal polarization direction COL' of the normal output light COL can be any direction, and the polarization direction of the normal output light COL is not limited to the four directions indicated by the four double arrows. In this way, the normal input light CIL, which is parallel to the optical axis OA, is not polarized by the first polarization component 21.

[0137] Reference is made to Figure 3C The oblique output light AOL is polarized. The oblique polarization direction AOL' of the oblique output light AOL depends on the direction of travel (or observation point) of the oblique output light AOL. As Figure 3CAs shown, the tilted polarization direction AOL' of the tilted output light AOL is perpendicular to the optical axis OA. Further, each tilted polarization direction AOL' of the tilted output light AOL is perpendicular to the corresponding direction of travel ID of the tilted output light AOL. That is, the tilted polarization direction AOL' of the tilted output light AOL is perpendicular to the optical axis OA and the corresponding direction of travel ID of each tilted output light AOL.

[0138] In position A, the polarization direction AOL' of the tilted output light AOL is perpendicular to its direction of travel ID and the optical axis OA, and the polarization direction AOL' is parallel to the X-axis. In position B, the polarization direction AOL' of the tilted output light AOL is perpendicular to its direction of travel ID and the optical axis OA, and the polarization direction AOL' is parallel to the X-axis. In position C, the polarization direction AOL' of the tilted output light AOL is perpendicular to its direction of travel ID and the optical axis OA, and the polarization direction AOL' is parallel to the Y-axis. In position D, the polarization direction AOL' of the tilted output light AOL is perpendicular to its direction of travel ID and the optical axis OA, and the polarization direction AOL' is parallel to the Y-axis.

[0139] Reference is made to Figure 4 which shows a schematic diagram illustrating an illustrative process of input light CL incident to light adjuster 22 according to some embodiments of the present disclosure. The polarization direction of the input light CL can be changed (after passing through the light adjuster 22) by applying a voltage to the light adjuster 22. According to some embodiments, the light adjuster 22 can include a light twist element 221, a first electrode 222a, and a second electrode 222b. The light twist element 221 is disposed between the first electrode 222a and the second electrode 222b. In some embodiments, the light twist element 221 can be a liquid crystal, but is not limited thereto. By applying a voltage between the first electrode 222a and the second electrode 222b, the polarization direction of the input light CL can be changed. In some embodiments, by changing the voltage between the first electrode 222a and the second electrode 222b, the polarization direction of the input light CL can be changed. In some embodiments, when no voltage is applied to the light adjuster 22 (e.g., when no voltage is applied between the first electrode 222a and the second electrode 222b), the polarization direction of the input light CL is not changed.

[0140] The light adjuster 22 can twist the polarization direction of the incident light. In some embodiments, for example, the polarization direction of the input light can be twisted by 0 degrees, 15 degrees, 45 degrees, 60 degrees, 75 degrees, 90 degrees, 105 degrees, 120 degrees, 135 degrees, 150 degrees, 165 degrees, 180 degrees, etc., but is not limited thereto. In some embodiments, the polarization direction of the incident light can be twisted by 90 degrees by the light adjuster 22.

[0141] In some embodiments, when the first electrode 222a and the second electrode 222b apply a voltage to the light twisting assembly 221, the light modulator 22 can twist the polarization direction of the incident light; and when the first electrode 222a and the second electrode 222b apply different voltages to the light twisting assembly 221, the light modulator 22 can not twist the polarization direction of the input light.

[0142] In some embodiments, when the first electrode 222a and the second electrode 222b apply a voltage to the light twisting assembly 221, the light modulator 22 can twist the polarization direction of the input light by an angle; and when the first electrode 222a and the second electrode 222b apply different voltages to the light twisting assembly 221, the light modulator 22 can twist the polarization direction of the input light by different angles. In some embodiments, the light twisting assembly 221 can be a twisted nematic mode liquid crystal (TN-mode liquid crystal) or an eBCC-mode liquid crystal. In one embodiment, in a twisted nematic mode liquid crystal or an eBCC-mode liquid crystal, the polarization direction of the incident light can be twisted by 90 degrees. In one embodiment, in an eBCC-mode liquid crystal, the polarization direction of the incident light can be twisted by 45 degrees.

[0143] In such Figure 4 In the illustrated embodiment, the central light CL can be polarized, and the polarization direction CL' of the central light CL can be parallel to the X-axis. The central light CL is incident on the light modulator 22, and can be converted into a central modulated light CML. A voltage can be applied to the light modulator 22 (for example, applied to the first electrode 222a and the second electrode 222b) to twist the polarization direction CML' of the central modulated light CML by 90 degrees. That is, the polarization direction CML' of the central modulated light CML can be parallel to the Y-axis.

[0144] In some embodiments, the second polarization component 23 may have an absorption axis perpendicular to the optical axis OA of the display device 100. That is, the absorption axis of the second polarization component 23 may be on the output surface 100S, on the output surface 20S, on the output surface 21S, or on the output surface 23S. Figure 1 As shown, the absorption axis of the second polarization component 23 can be perpendicular to the Z-axis, or it can be on the XY plane (that is, the absorption axis of the second polarization component 23 can be parallel to the X-axis or the Y-axis).

[0145] In some embodiments, please refer to Figure 1The absorption axis of the second polarizing component 23 can be parallel to the Y-axis. The center polarized light CPL and the skew polarized light APL can not be twisted (the light adjuster 22 is not enabled) when the first electrode 222a and the second electrode 222b apply a voltage to the light twist component 221. The second polarizing component 23 can twist the center polarized light CPL and the skew polarized light APL by 90 degrees (the light adjuster 22 is enabled) when no voltage is applied from the first electrode 222a and the second electrode 222b to the light twist component 221. In other words, in the above description, the light adjuster 22 can be not enabled with voltage and enabled without voltage. Enabling the light twist component 221 causes the light passing through the light twist component 221 to be twisted. Disabling the light twist component 221 causes the light passing through the light twist component 221 not to be twisted. The features of the light twist component 221 and the second polarizing component 23 are applicable to the following embodiments unless otherwise specified. In some embodiments, the light adjuster 22 can be enabled with voltage and can be disabled without voltage.

[0146] Please refer to Figure 5 and Figure 6A which show exemplary embodiments of the display device 100 according to some embodiments of the present disclosure. The output light OLA, the output light OLB, the output light OLC, and the output light OLF are output from the position A, the position B, the position C, and the position D of the display device 100, respectively. The output light OLE is on and parallel to the optical axis OA of the display device 100, and the output light OLA, the output light OLB, the output light OLC, and the output light OLF are not parallel to the optical axis OA.

[0147] When the light adjuster 22 is not enabled, the polarization directions of the output light are shown in Table 1.1 and Table 1.2. As shown in Table 1.1 and Table 1.2, the display device 100 is arranged in a landscape mode. In the X-Y plane, the position C can refer to the left side, and the position D can refer to the right side, the position A can refer to the upper side, and the position B can refer to the lower side. Figure 6A Figure 1 As shown in Table 1.1 and Table 1.2, the display device 100 is arranged in a landscape mode. In the X-Y plane, the position C can refer to the left side, and the position D can refer to the right side, the position A can refer to the upper side, and the position B can refer to the lower side.

[0148] Table 1.1 and Table 1.2 illustrate the light passing through the second polarizing component 23, the light adjuster 22, and the first polarizing component 21, and show the polarization directions of the light. According to Table 1.1 and Table 1.2, the display device 100 is arranged in a landscape mode. In the X-Y plane, the position C can refer to the left side, and the position D can refer to the right side, the position A can refer to the upper side, and the position B can refer to the lower side. Figure 6A ​As shown, the output light cannot be observed at the observation positions C and D. That is, the content displayed on the display device 100 is invisible to observers at sides C and D. However, the output light can be observed at the observation positions A and B. That is, the content displayed on the display device 100 is visible to observers at sides A and B. Therefore, when the display device 100 is arranged in landscape mode (for example, by a user), the display device 100 can be in privacy mode. On the other hand, as... Figure 6C As shown, when the display devices 100 are arranged in a portrait mode, the display devices 100 can be in a shared mode.

[0149] Table 1.1

[0150]

[0151]

[0152]

[0153] Table 1.2

[0154] As shown in Tables 1.1 and 1.2, the second polarization component 23 used may have an absorption axis parallel to the Y-axis (absorbing light on the Y-axis), and when the light modulator 22 is not enabled, the tilted output light on the Y-axis will be absorbed. Therefore, the tilted output light will be darkened at the Y-axis and has a polarization direction on the X-axis. The content of the display device 100 may be invisible at positions C and D, and visible at positions A and B. Therefore, the display device 100 may be in the following positions: Figure 6A The privacy mode and landscape mode are shown.

[0155] In other embodiments (though not shown in Tables 1.1 and 1.2), the second polarization component 23 may have an absorption axis parallel to the X-axis (absorbing light on the X-axis), and the light modulator 22 used may rotate the light by 90 degrees. When the light modulator 22 is enabled, the tilted output light with a polarization direction parallel to the Y-axis will be absorbed. In this embodiment, the input light passes through the second polarization component 23, which absorbs light on the X-axis, and the polarized light from the second polarization component 23 is parallel to the Y-axis. Then, the polarized light passes through the light modulator 22, and the polarization direction of the modulated light from the light modulator 22 changes from the Y-axis to the X-axis. Therefore, the tilted output light will not be parallel to the Y-axis (or will be darkened on the Y-axis); instead, the polarization direction of the tilted output light will be parallel to the X-axis. The content of the display device 100 may be invisible at positions C and D, and visible at positions A and B. Therefore, the display device 100 may also be as follows: Figure 6A The privacy mode and landscape mode are shown.

[0156] When the light adjuster 22 is enabled, the polarization direction of the output light is as shown in Table 2.1 and Table 2.2. As such, as shown in Table 2.1 and Table 2.2, in the viewing positions of side A and side B, the output light cannot be observed. That is, the content shown in the display device 100 is not visible to the observers of side A and side B. However, in the viewing positions of side C and side D, the output light can be observed. That is, the content shown in the display device 100 is visible to the observers of side C and side D. Thus, when the display device 100 is arranged in the landscape mode (e.g., by the user), the display device 100 can be in the sharing mode. On the other hand, as shown in Table 2.1 and Table 2.2, when the display device 100 is arranged in the portrait mode, the display device 100 can be in the privacy mode. Figure 6B Figure 6D

[0157] Table 2.1

[0158]

[0159] Table 2.2

[0160]

[0161]

[0162] As shown in Table 2.1 and Table 2.2, the second polarization component 23 used can have an absorption axis parallel to the Y axis (absorbing light on the Y axis), and the light adjuster 22 used can rotate the light by 90 degrees. When the light adjuster 22 is enabled, the light on the X axis is absorbed, and the polarization direction of the light passing through the second polarization component 23 and the light adjuster 22 is the Y axis. In this embodiment, the input light passes through the second polarization component 23, the second polarization component 23 absorbs the light on the Y axis, and the polarized light from the second polarization component 23 is parallel to the X axis. Thereafter, the polarized light passes through the light adjuster 22, and the polarization direction of the adjusted light from the light adjuster 22 changes from the X axis to the Y axis. Thus, the oblique output light will not be parallel to the X axis (or darkened at the X axis), and instead, the polarization direction of the oblique output light is parallel to the Y axis. Thus, the oblique output light will be darkened at the X axis, and the content of the display device 100 can be invisible at positions A and B, and visible at positions C and D. Thus, as shown in Table 2.1 and Table 2.2, the display device 100 can be in the sharing mode and the landscape mode. Figure 6B

[0163] ​​​In other embodiments (although not shown in Table 2.1 and Table 2.2), the second polarizing component 23 can have an absorption axis parallel to the X axis (absorbing light on the X axis), and when the light ray adjuster 22 is not enabled, the oblique output light with its polarization direction parallel to the X axis will be absorbed. Therefore, the oblique output light is not parallel to the X axis (or dark at the X axis), and the content of the display device 100 can be invisible at the position A and the position B, and visible at the position C and the position D. Therefore, as shown in FIG. 10, the display device 100 can also be in the sharing mode and the landscape mode. Figure 6B

[0164] Therefore, when the display device 100 is in the landscape mode, the display device 100 can switch between the sharing mode and the privacy mode; and when the display device 100 is in the portrait mode, the display device 100 can switch between the sharing mode and the privacy mode.

[0165] To determine whether a component is the same as, similar to, or equivalent to the first polarizing component 21, a luminance meter such as Topcon BM-5A can be used to analyze the component to be determined, but is not limited thereto. It should be noted that the component to be determined can be originally installed or mounted in an electronic device or a display device (which can include a privacy module), or the component to be determined can be originally installed or mounted in a privacy module. That is, the component to be determined can be taken out from the electronic device, the display device, or the privacy module. In some embodiments, an additional polarizing film having an absorption axis along the Y axis can be used with the component to be determined. For example, light can pass through the component to be determined and the additional polarizing film, and the luminance of the output light at the vertical position and the oblique position can be analyzed using the luminance meter, respectively. As previously described, the vertical position of the component to be determined is a position in front of its output surface (which can refer to the output surface 21S of the first polarizing component 21) and perpendicular to its output surface (the output surface 21S of the first polarizing component 21); and the oblique position is a position that is not perpendicular to its output surface. Figure 3B The light output from the first polarizing component 21 is shown. By providing an additional polarizing film (absorbing light on the Y axis) on the first polarizing component 21, the light on the Y axis (at the position C and the position D) can be further absorbed. The result will show that the output light at the position C and the position D is dark, the output light at the position A and the position B is bright, and the vertical output light is bright. If the component to be determined shows the same or similar result, the component to be determined can be the first polarizing component 21.

[0166] Please refer to Figure 7A which is a flowchart of a display device control method M200 of an embodiment of the present disclosure. It should be noted that Figure 7A the order of the steps shown inthe order of the steps is only an example, and the order of the steps is not limited toFigure 7A the flowchart.

[0167] The display device control method M200 can start from step S202. According to some embodiments, in step S202, the operation mode (the sharing mode and the privacy mode) of the display device 100 is determined. According to some embodiments, in step S202, the operation mode of the display device 100 can be determined by the user. According to some embodiments, in step S202, the user can choose / enter between the sharing mode and the privacy mode according to his / her preference.

[0168] According to some embodiments, in step S202, after the operation mode is determined, an operation signal indicative of the operation mode of the display device 100 is transmitted to a processor of the display device 100. The display device control method M200 then proceeds to step S204.

[0169] According to some embodiments, in step S204, the orientation mode (the landscape mode and the portrait mode) of the display device 100 is determined. According to some embodiments, in step S204, the user can determine the orientation mode of the display device 100 by rotating the display device 100. According to some embodiments, in step S204, the user can rotate the display device 100 between the landscape mode and the portrait mode according to his / her preference.

[0170] It should be noted that the order of step S202 and step S204 can be interchanged according to some embodiments. That is, in some embodiments, the device control method M200 can start from step S204, followed by step S202. The display device control method M200 then proceeds to step S206.

[0171] According to some embodiments, in step S206, the orientation mode of the display device 100 is sensed. In some embodiments, the sensor can be a gyro sensor, or any other suitable sensor for sensing the orientation mode of the display device 100. According to some embodiments, in step S206, after the orientation mode is sensed, an orientation signal indicative of the orientation mode of the display device 100 is transmitted to a processor of the display device 100. The display device control method M200 then proceeds to step S208.

[0172] According to some embodiments, in step S208, the light adjuster 22 is controlled by the processor of the display device 100 based on the operation mode and the orientation mode of the display device 100. According to some embodiments, in step S208, the light adjuster 22 is controlled by the processor of the display device 100 based on the operation signal and the orientation signal transmitted to (or received by) the processor of the display device 100. It should be noted that controlling the operation of the light adjuster 22 can include applying or not applying a voltage from the first electrode 222a and the second electrode 222b to the light twist component 221.

[0173] According to some embodiments, step S208 can include step S2081( Figure 6A ), step S2082( Figure 6B ), step S2083( Figure 6D ), and step S2084( Figure 6C ).

[0174] According to some embodiments, in step S2081, when the display device 100 is in the privacy mode and the landscape mode, the light adjuster 22 can be disabled. In some embodiments, the second polarization component 23 can have an absorption axis parallel to the Y axis. In some embodiments, the second polarization component 23 can have an absorption axis parallel to the X axis, and the light adjuster 22 can be enabled, thus, as shown in Figure 6A , the display device 100 can be in the privacy mode and the landscape mode. Figure 6A

[0175] According to some embodiments, in step S2082, when the display device 100 is in the sharing mode and the landscape mode, the light adjuster 22 can be enabled. In some embodiments, the second polarization component 23 can have an absorption axis parallel to the Y axis. In some embodiments, the second polarization component 23 can have an absorption axis parallel to the X axis, and the light adjuster 22 can be disabled, thus, as shown in Figure 6B , the display device 100 can be in the sharing mode and the landscape mode.

[0176] According to some embodiments, in step S2083, when the display device 100 is in the privacy mode and the portrait mode, the light adjuster 22 can be enabled. In some embodiments, the second polarization component 23 can have an absorption axis parallel to the Y axis. In some embodiments, the second polarization component 23 can have an absorption axis parallel to the X axis, and the light adjuster 22 can be disabled, thus, as shown in Figure 6D , the display device 100 can be in the privacy mode and the portrait mode.

[0177] ​In some embodiments, when the display device is in landscape mode, the light modulator 22 can be enabled or disabled to change the operating mode. Specifically, the privacy module 20 includes a first polarization component 21, a light modulator 22, and a second polarization component 23 (with the Y-axis as the absorption axis). When the light modulator 22 is disabled (Tables 1.1 and 1.2), the light output from the display device 100 in landscape mode can be as if it were in privacy mode. Figure 6A As shown. Furthermore, when the light modulator 22 is enabled (Tables 2.1 and 2.2), the light output from the display device 100 in landscape mode can be as in shared mode. Figure 6B As shown. In some other embodiments, the second polarizing component 23 used may have an absorption axis on the X-axis. By the same principle, the light modulator 22 can be enabled or disabled to obtain, respectively, the desired effect. Figure 6A and Figure 6B The output light is shown, but its detailed description is omitted.

[0178] In some embodiments, when the display device is in portrait mode, the light modulator 22 can be enabled or disabled to change the operating mode. Specifically, the privacy module 20 includes a first polarization component 21, a light modulator 22, and a second polarization component 23 (with the Y-axis as the absorption axis). When the light modulator 22 is disabled (Tables 1.1 and 1.2), the light output from the display device 100 in portrait mode can be as if it were in shared mode. Figure 6C As shown. Furthermore, when the light modulator 22 is enabled (Tables 2.1 and 2.2), the light output from the display device 100 in portrait mode can be as in privacy mode. Figure 6D As shown. In some other embodiments, the second polarizing component 23 used may have an absorption axis on the X-axis. By the same principle, the light modulator 22 can be enabled or disabled to obtain, respectively, the desired effect. Figure 6C and Figure 6D The output light is shown, but its detailed description is omitted.

[0179] According to some embodiments, in step S2084, when the display device 100 is in shared mode and portrait mode, the light adjuster 22 may be disabled. In some embodiments, the second polarization component 23 may have an absorption axis parallel to the Y-axis. In some embodiments, the second polarization component 23 may have an absorption axis parallel to the X-axis, and the light adjuster 22 may be disabled, therefore, as Figure 6C As shown, the display device 100 can be in shared mode and portrait mode.

[0180] According to some embodiments, the display device control method M200 can return to step S204 in loop L210. According to some embodiments, in loop L210, after controlling the light adjuster 22, the orientation mode of the display device 100 is re-determined.

[0181] According to some embodiments, the display device control method M200 can return to step S202 in loop L212. According to some embodiments, in loop L212, after controlling the light adjuster 22, the operation mode of the display device 100 is re-determined.

[0182] According to some embodiments, the display device control method M200 can return to step S204 in loop L210. According to some embodiments, in loop L210, after controlling the light adjuster 22, the orientation mode of the display device 100 is re-determined.

[0183] Reference is made to Figure 7B which is a flowchart of a display device control method M300 provided by some embodiments of the present disclosure. It should be noted that Figure 7B The order of the steps shown is only an example, and the order of the steps is not limited to Figure 7B the flowchart shown.

[0184] The device control method M300 can start from step S302. According to some embodiments, in step S302, the display device 100 is provided. According to some embodiments, the display device 100 comprises a light adjuster 22. The display device control method M300 then proceeds to step S304.

[0185] According to some embodiments, in step S304, the operation mode (sharing mode and privacy mode) of the display device 100 is determined. According to some embodiments, in step S304, the operation mode of the display device 100 can be determined by the user. According to some embodiments, in step S304, the user can choose / input between the sharing mode and the privacy mode according to his / her preference. The display device control method M300 then proceeds to step S306.

[0186] According to some embodiments, in step S306, the orientation mode (landscape mode and portrait mode) of the display device 100 is sensed. According to some embodiments, in step S306, the user can determine the orientation mode of the display device 100 by rotating the display device 100. According to some embodiments, in step S306, the user can rotate the display device between landscape mode and portrait mode according to his or her preference. The display device control method M300 then proceeds to step S308.

[0187] According to some embodiments, in step S308, the light adjuster 22 is controlled based on the operating mode and orientation mode of the display device 100.

[0188] According to the display device control method M300, when the display device 100 is in landscape mode, the display device 100 can switch between sharing mode and privacy mode; and when the display device 100 is in portrait mode, the display device 100 can switch between sharing mode and privacy mode.

[0189] Please refer to the diagram. Figure 8A This illustrates some exemplary embodiments of the configuration of the display device 100. For example... Figure 8A As shown, the display module 10 may further include a liquid-crystal panel 12. The liquid-crystal panel 12 may include two display module polarization components 121 and a liquid-crystal cell 122. The liquid-crystal cell 122 may be disposed between the two display module polarization components 121. The privacy module 20 may be disposed between the light source 11 and the liquid-crystal panel 12. The first polarization component 21 may be disposed between the light source 11 and the light modulator 22. The light modulator 22 may be disposed between the first polarization component 21 and the second polarization component 23. The second polarization component 23 may be disposed between the light modulator 22 and one of the display module polarization components 121.

[0190] In some embodiments, the light source 11 can be any backlight unit suitable for the liquid crystal panel 12. The liquid crystal unit 122 can be any liquid crystal mode, such as a twisted nematic liquid crystal (TN liquid crystal), a vertical Alignment liquid crystal (VA liquid crystal), an in-plane switching liquid crystal (IPS liquid crystal), a fringe field switching liquid crystal (FFS liquid crystal), or an optically compensated bend (OCB liquid crystal), etc., but not limited thereto. In some embodiments, the display module polarization assembly 121 can include a compensation film (retardation film) for wider viewing angle.

[0191] In some embodiments (although not shown), the second polarization assembly 23 can be omitted. In these cases, the light adjuster 22 can be disposed between one of the first polarization assembly 21 and the display module polarization assembly 121. That is, the light adjuster 22 can be in contact with the display module polarization assembly 121 disposed in the liquid crystal panel 12. According to some embodiments, the display device 100 can be thinner and lighter without the second polarization assembly 23, and the output light OL can be brighter.

[0192] Reference is made to Figure 8B which shows some exemplary embodiments of the configuration of the display device 100. As shown in Figure 8B , the liquid crystal panel 12 can be disposed between the privacy module 20 and the light source 11. The light adjuster 22 can be disposed between the first polarization assembly 21 and the second polarization assembly 23. The second polarization assembly 23 can be disposed between the light adjuster 22 and one of the display module polarization assembly 121.

[0193] In some embodiments (although not shown), the second polarization component 23 can be omitted. In these cases, the light adjuster 22 can be disposed between one of the first polarization component 21 and the display module polarization component 121. That is, the light adjuster 22 can be in contact with the display module polarization component 121. According to some embodiments, the display device 100 can be thinner and lighter without the second polarization component 23, and the output light OL can be brighter.

[0194] It should be noted that in the above configuration, the first polarization component 21 can not be in contact with the display module polarization component 121. According to some embodiments, the light adjuster 22 can be disposed between the first polarization component 21 and the display module polarization component 121 when the display module polarization component 121 is present.

[0195] Reference is made to Figure 8C which shows some exemplary embodiments of the configuration of the display device 100. As Figure 8C shown, the light source 11 can include or be an electronic paper (E-paper), or a light emitting display, such as an organic light-emitting diode (OLED), a mini light-emitting diode (miniLED), a micro light-emitting diode (microLED), or a cathode-ray tube (CRT), but is not limited thereto. In Figure 8C the embodiment shown, the light adjuster 22 can be disposed between the first polarization component 21 and the second polarization component 23, and the second polarization component 23 can be disposed between the light adjuster 22 and the light source 11. In other embodiments, the light adjuster 22 can be disposed between the first polarization component 21 and the second polarization component 23, and the first polarization component 21 can be disposed between the light adjuster 22 and the light source 11.

[0196] Reference is made to Figure 8D which shows some exemplary embodiments of the configuration of the display device 100. As Figure 8CAs shown, the light source 11 can include or be an electronic paper (E-paper) with electronic ink (Eink), and the display module 10 can further include a front light 13. The privacy module 20 can be disposed between the light source 11 and the front light 13. The first polarizing component 21 can be disposed between the front light 13 and the light adjuster 22. The light adjuster 22 can be disposed between the first polarizing component 21 and the second polarizing component 23. The second polarizing component 23 can be disposed between the light adjuster 22 and the light source 11.

[0197] In some embodiments, the light source 11 can include or be an electronic paper (E-paper) with a reflective liquid-crystal display (R-LCD), or a transflective liquid-crystal display.

[0198] In some embodiments, the privacy module 20 is disposed between the light source 11 and the front light 13. The first polarizing component 21 is disposed between the light source 11 and the light adjuster 22. The light adjuster 22 is disposed between the first polarizing component 21 and the second polarizing component 23. The second polarizing component 23 is disposed between the light adjuster 22 and the front light 13.

[0199] In some embodiments, the front light 13 is disposed between the light source 11 and the privacy module 20. The front light 13 is disposed between the light source 11 and the second polarizing component 23. The light adjuster 22 is disposed between the first polarizing component 21 and the second polarizing component 23. The second polarizing component 23 is disposed between the light adjuster 22 and the front light 13.

[0200] In some embodiments, the front light 13 is disposed between the light source 11 and the privacy module 20. The front light 13 is disposed between the light source 11 and the first polarizing component 21. The first polarizing component 21 is disposed between the front light 13 and the light adjuster 22. The light adjuster 22 is disposed between the first polarizing component 21 and the second polarizing component 23.

[0201] In general, embodiments of the present disclosure provide a display device 100 with a privacy module 20. In some embodiments, the privacy module includes a first polarizing component that does not polarize vertical input light and can polarize oblique input light. In some embodiments, with the privacy module, the display device can switch between a sharing mode and a privacy mode, whether in a landscape mode or a portrait mode. In some embodiments, a light adjuster of the privacy module can be enabled or disabled to change the privacy mode or the sharing mode of the display device. In some embodiments, both the landscape mode and the portrait mode can provide the privacy mode and the sharing mode.

[0202] While the above has described the embodiments and advantages of the present disclosure, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the present disclosure. It is noted that different embodiments can be combined into other embodiments as long as the combination complies with the spirit of the present disclosure. Furthermore, the scope of the present disclosure is not limited to the processes, machines, manufacture, compositions of matter, means, methods, and steps described in the specific embodiments described in the specification. Those skilled in the art can understand existing or developing processes, machines, manufacture, compositions of matter, means, methods, and steps from some embodiments of the present disclosure. Therefore, the scope of the present disclosure includes the aforementioned processes, machines, manufacture, compositions of matter, means, methods, and steps. Furthermore, each of the appended claims constitutes a separate embodiment and the scope of the present disclosure further includes each combination of the appended claims and embodiments.

Claims

1. A display device, comprising: A display module, including a light source that emits an input light; as well as A privacy module is installed on the display module and is used to receive the input light. The privacy module is characterized by including a first polarization component for absorbing light in a predetermined direction, which is not parallel to an optical axis of the display device. The input light includes a perpendicular input light parallel to the optical axis and a tilted input light not parallel to the optical axis, wherein the perpendicular input light is not polarized by the first polarization component, and the tilted input light is polarized by the first polarization component. This privacy module further includes: A second polarization component, wherein the second polarization component has an absorption axis perpendicular to the optical axis; and A light modulator is disposed between the first polarization component and the second polarization component, wherein the polarization direction of a light beam passing through the light modulator is changed by changing a voltage applied to the light modulator.

2. The display device as described in claim 1, characterized in that... The first polarization component includes a light-absorbing dye.

3. The display device as described in claim 2, characterized in that... The light-absorbing dyes include dichroic dyes.

4. The display device as described in claim 2, characterized in that... The light-absorbing dye includes a longitudinal axis parallel to the optical axis.

5. The display device as described in claim 2, characterized in that... The first polarization component further includes a liquid crystal for aligning the light-absorbing dye.

6. The display device as described in claim 1, characterized in that... The first polarization component is disposed between the light source and the light modulator.

7. A method for controlling a display device, comprising: A display device is provided, including a light modulator, the display device including a light source that emits an input light; A first polarizing component for absorbing light in a predetermined direction, the predetermined direction being non-parallel to an optical axis of the display device; and a second polarizing component having an absorption axis perpendicular to the optical axis, wherein a light modulator is disposed between the first polarizing component and the second polarizing component, wherein a polarization direction of light passing through the light modulator is changed by changing a voltage applied to the light modulator; Determine an operating mode for the display device; Sensing a certain orientation mode of the display device; and Based on the operating mode and orientation mode of the display device, the light adjuster is controlled. The input light includes a vertical input light parallel to the optical axis and an inclined input light not parallel to the optical axis, wherein the vertical input light is not polarized by the first polarization component, and the inclined input light is polarized by the first polarization component.

8. The display device control method as described in claim 7, characterized in that... The operating modes of this display device include a sharing mode and a privacy mode.

9. The display device control method as described in claim 8, characterized in that... The orientation modes of the display device include a landscape mode and a portrait mode.

10. The display device control method as described in claim 9, characterized in that... The steps for controlling the light modulator include: When the display device is in landscape mode, enable or disable the light adjuster to change the operating mode.

11. The display device control method as described in claim 9, characterized in that... The steps for controlling the light regulator include: When the display device is in portrait mode, enable or disable the light adjuster to change the operating mode.

Images