Self-luminous display device and driving method

Abstract

The invention discloses a self-luminous display device and a driving method, the self-luminous display device comprises a dimming box, a quarter-wave plate and a self-luminous display panel which are stacked in sequence, and the self-luminous display panel is provided with a reflective structure used for reflecting ambient light; the dimming box comprises a first substrate, a second substrate and a dye liquid crystal layer, an auxiliary electrode is arranged on the first substrate, and a control electrode matched with the auxiliary electrode is arranged on the second substrate. Liquid crystal molecules and dye molecules in the dye liquid crystal layer are driven to deflect by controlling the voltage applied to the auxiliary electrodes and the control electrodes, so that the liquid crystal molecules and the dye molecules in the dye liquid crystal layer are in a lying posture, and a wide viewing angle mode is achieved. Or liquid crystal molecules and dye molecules in the dye liquid crystal layer are in an inclined posture so as to realize a narrow viewing angle mode; or liquid crystal molecules and dye molecules in the dye liquid crystal layer are in an inclined posture or a vertical posture, and the self-luminous display panel is closed, so that a mirror reflection mode is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of OLED displays, and in particular to a self-luminous display device and a driving method. Background Art

[0002] With the development of the information age, the application of display screens has become increasingly broad and diversified, and various technical display screens have also flourished. Self-luminous displays are the next generation of displays after LCD (liquid crystal display). They have the advantages of good image quality, small size, light weight, low driving voltage, low power consumption, no radiation and relatively low manufacturing cost. Their development and application are becoming more and more extensive. Self-luminous displays include, for example, OLED (Organic Light-Emitting Diode) displays and Micro LED (micro light-emitting diode) displays.

[0003] Generally, OLED displays have a wide viewing angle and high color saturation due to their self-luminous characteristics. The viewing angle of OLED displays can reach more than 160°. While enjoying the wide viewing angle experience, people also hope to effectively protect business secrets and personal privacy to avoid business losses or embarrassment caused by screen information leakage. Therefore, in addition to the wide viewing angle requirement, in many occasions, the display device also needs to have the function of switching between wide and narrow viewing angles.

[0004] Currently, the main method is to attach a louver film to the OLED display to achieve switching between wide and narrow viewing angles. When anti-peeping is needed, the screen can be covered with a louver film to narrow the viewing angle. However, this method requires additional louver film, which will cause great inconvenience to the user. Moreover, a louver film can only achieve one viewing angle. Once the louver film is attached, the viewing angle is fixed in the narrow viewing angle mode, resulting in the inability to switch freely between the wide viewing angle mode and the narrow viewing angle mode. In addition, the anti-peeping film will reduce the brightness and affect the taste.

[0005] Moreover, many existing cars are equipped with a mirror display device, which not only has the functions of an ordinary rearview mirror, but also has the functions of a reversing image, a driving recorder, etc. The existing mirror display devices are all made by bonding a display device for displaying an image, a mirror part, and an automatic anti-glare device together as a mirror display device. The display device is a liquid crystal display or an organic light-emitting display, etc., and the automatic anti-glare device is a device such as an electrochromic device that can automatically adjust the brightness. The mechanical thickness and weight of the mirror display device obtained by bonding and assembling are relatively large, which brings inconvenience to use. Summary of the invention

[0006] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a self-luminous display device and a driving method to solve the problem that the self-luminous display device in the prior art cannot achieve free switching between wide viewing angle, narrow viewing angle and reflection.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] The present invention provides a self-luminous display device, comprising a dimming box, a quarter-wave plate and a self-luminous display panel which are stacked in sequence;

[0009] The dimming box includes a first substrate, a second substrate arranged opposite to the first substrate, and a dye liquid crystal layer located between the first substrate and the second substrate, the dye liquid crystal layer includes liquid crystal molecules and dye molecules mixed with each other, the dye molecules rotate synchronously with the liquid crystal molecules, the first substrate is provided with an auxiliary electrode, and the second substrate is provided with a control electrode matched with the auxiliary electrode;

[0010] The self-luminous display panel is used to control the grayscale image display, and the self-luminous display panel is provided with a reflective structure for reflecting ambient light;

[0011] In the wide viewing angle mode, the self-luminous display panel is in the open state, the liquid crystal molecules and the dye molecules in the dye liquid crystal layer are in a lying posture, and the angle between the fast and slow axes of the quarter-wave plate is between 0-90°; in the narrow viewing angle mode, the self-luminous display panel is in the open state, the liquid crystal molecules and the dye molecules in the dye liquid crystal layer are in a tilted posture; in the mirror reflection mode, the self-luminous display panel is in the closed state, and the liquid crystal molecules and the dye molecules in the dye liquid crystal layer are both in a tilted posture or a vertical posture.

[0012] Furthermore, the reflective structure is a grid-like structure and is located between the first pixel units and in the non-display area of ​​the self-luminous display panel.

[0013] Furthermore, the reflective structure includes a first scan line and a first data line on the self-luminous display panel.

[0014] Furthermore, the liquid crystal molecules are positive liquid crystal molecules, the alignment direction of the dye liquid crystal layer is parallel to the first substrate and the second substrate, and the angle between the fast and slow axes of the quarter wave plate is between 0-90°;

[0015] Alternatively, the liquid crystal molecules are negative liquid crystal molecules, and the alignment direction of the dye liquid crystal layer is perpendicular to the first substrate and the second substrate.

[0016] Furthermore, in the wide viewing angle mode, the angle between the liquid crystal molecules in the dye liquid crystal layer and the dye molecules and the quarter wave plate is 45°.

[0017] Furthermore, the self-luminous display device has a logo pattern area and a non-logo pattern area, the control electrode includes a first control electrode corresponding to the logo pattern area and a second control electrode corresponding to the non-logo pattern area, and the first control electrode and the second control electrode are insulated and spaced apart from each other;

[0018] In the identification display mode, the self-luminous display panel is in a closed state, the liquid crystal molecules and the dye molecules corresponding to the identification pattern area are in a tilted posture or a vertical posture, the liquid crystal molecules and the dye molecules corresponding to the non-identification pattern area are in a lying posture, and the angle between them and the fast and slow axes of the quarter-wave plate is between 0-90°.

[0019] Further, a plurality of second scan lines and a plurality of second data lines are provided on the second substrate, the second scan lines and the second data lines are insulated from each other and cross to define a plurality of second pixel units, the control electrode includes a plurality of electrode blocks corresponding to the second pixel units, the second substrate is provided with a second thin film transistor in each of the second pixel units, and the electrode block is electrically connected to the second scan line and the second data line adjacent to the second thin film transistor through the second thin film transistor;

[0020] In the reflective display mode, a corresponding grayscale voltage is applied to each of the electrode blocks.

[0021] The present application also provides a driving method of a self-luminous display device, which is used to drive the self-luminous display device as described above, and the driving method includes:

[0022] In the wide viewing angle mode, the self-luminous display panel is controlled to be turned on, a common signal is applied to the auxiliary electrode, and a wide viewing angle signal is applied to the control electrode, so as to control the liquid crystal molecules and the dye molecules in the dye liquid crystal layer to lie flat, and the angle between the fast and slow axes of the quarter wave plate is between 0 and 90 degrees;

[0023] In the narrow viewing angle mode, the self-luminous display panel is controlled to be turned on, and a common signal is applied to the auxiliary electrode, and a narrow viewing angle signal is applied to the control electrode, so as to control the liquid crystal molecules and the dye molecules in the dye liquid crystal layer to be in a tilted posture;

[0024] In the mirror reflection mode, the self-luminous display panel is controlled to be turned off, a common signal is applied to the auxiliary electrode, and a reflection signal is applied to the control electrode to control the liquid crystal molecules and the dye molecules in the dye liquid crystal layer to be in a tilted posture or a vertical posture.

[0025] Furthermore, the self-luminous display device has a logo pattern area and a non-logo pattern area, the control electrode includes a first control electrode corresponding to the logo pattern area and a second control electrode corresponding to the non-logo pattern area, the first control electrode and the second control electrode are insulated and spaced apart from each other, and the driving method includes:

[0026] In the identification display mode, the self-luminous display panel is controlled to be turned off, and a common signal is applied to the auxiliary electrode, and a bright state signal is applied to the first control electrode to control the liquid crystal molecules and the dye molecules corresponding to the identification pattern area to be in a tilted posture or a vertical posture; and a dark state signal is applied to the second control electrode to control the liquid crystal molecules and the dye molecules corresponding to the non-identification pattern area to be in a lying posture, and the angle between them and the fast and slow axes of the quarter wave plate is between 0-90°.

[0027] Further, a plurality of second scan lines and a plurality of second data lines are provided on the second substrate, the second scan lines and the second data lines are insulated from each other and cross to define a plurality of second pixel units, the control electrode includes a plurality of electrode blocks corresponding to the second pixel units, the second substrate includes a second thin film transistor in each of the second pixel units, the electrode block is electrically connected to the second scan line and the second data line adjacent to the second thin film transistor through the second thin film transistor, and the driving method includes:

[0028] In the reflective display mode, the self-luminous display panel is controlled to be turned off, a common signal is applied to the auxiliary electrode, and a corresponding grayscale voltage is applied to each of the electrode blocks to control each of the second pixel units to present a corresponding brightness.

[0029] The beneficial effects of the present invention are: by controlling the voltage applied to the auxiliary electrode and the control electrode, the liquid crystal molecules and the dye molecules in the dye liquid crystal layer are driven to deflect, so that the liquid crystal molecules and the dye molecules in the dye liquid crystal layer are in a flat posture to achieve a wide viewing angle mode; or the liquid crystal molecules and the dye molecules in the dye liquid crystal layer are in an inclined posture to achieve a narrow viewing angle mode; or the liquid crystal molecules and the dye molecules in the dye liquid crystal layer are in an inclined posture or a vertical posture, and the self-luminous display panel is closed, and the reflective structure on the self-luminous display panel is matched to achieve a mirror reflection mode. Moreover, in the wide viewing angle mode, the angle between the liquid crystal molecules and the dye molecules and the fast and slow axes of the quarter wave plate is also controlled to be between 0-90°, so as to avoid the reflective structure on the self-luminous display panel from reflecting ambient light, and play an anti-glare effect to enhance the wide viewing angle display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1It is a schematic structural diagram of the self-luminous display device in the initial state in the first embodiment of the present invention.

[0031] Figure 2 Schematic diagram of pixel arrangement of the self-luminous display device in Embodiment 1 of the present invention.

[0032] Figure 3 It is a plan view of a driving circuit on a self-luminous display panel in the first embodiment of the present invention.

[0033] Figure 4 1 is a driving signal waveform diagram of the self-luminous display device in the first embodiment of the present invention in the wide viewing angle mode.

[0034] Figure 5 Schematic diagram of the structure of the self-luminous display device in the first embodiment of the present invention in the wide viewing angle mode.

[0035] Figure 6 It is a schematic diagram of the optical path principle of the self-luminous display device in the wide viewing angle mode in the first embodiment of the present invention.

[0036] Figure 7 1 is a driving signal waveform diagram of the self-luminous display device in the narrow viewing angle mode in the first embodiment of the present invention.

[0037] Figure 8 Schematic diagram of the structure of the self-luminous display device in the first embodiment of the present invention in the narrow viewing angle mode.

[0038] Fig. 9 1 is a driving signal waveform diagram of the self-luminous display device in the mirror reflection mode in the first embodiment of the present invention.

[0039] Fig.10 It is a schematic structural diagram of the self-luminous display device in the first embodiment of the present invention in the mirror reflection mode.

[0040] Fig.11 It is a schematic diagram of the optical path principle of the self-luminous display device in the mirror reflection mode in the first embodiment of the present invention.

[0041] Fig.12 It is a schematic structural diagram of the self-luminous display device in the initial state in the second embodiment of the present invention.

[0042] Fig.13 It is a schematic diagram of the planar structure of the self-luminous display device in the second embodiment of the present invention.

[0043] Fig.14 It is a schematic diagram of the planar structure of the control electrode in the second embodiment of the present invention.

[0044] Fig.15 It is a schematic diagram of the structure of the self-luminous display device in the second embodiment of the present invention in the identification display mode.

[0045] Fig.16 It is a schematic structural diagram of the self-luminous display device in the initial state in the third embodiment of the present invention.

[0046] Fig.17 It is a schematic diagram of the planar structure of the second substrate in the third embodiment of the present invention.

[0047] Fig.18 It is a schematic diagram of the structure of the self-luminous display device in the reflective display mode in the third embodiment of the present invention.

[0048] Fig.19 It is a schematic structural diagram of the self-luminous display device in the initial state in the fourth embodiment of the present invention.

[0049] Fig. 20 It is one of the planar structural schematic diagrams of the self-luminous display device in the present invention.

[0050] Fig.21 This is the second schematic diagram of the planar structure of the self-luminous display device in the present invention. DETAILED DESCRIPTION

[0051] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the self-luminous display device and driving method proposed in the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments:

[0052] [Example 1]

[0053] Figure 1 It is a schematic structural diagram of the self-luminous display device in the initial state in the first embodiment of the present invention. Figure 2 Schematic diagram of pixel arrangement of the self-luminous display device in Embodiment 1 of the present invention. Figure 3 It is a plan view of a driving circuit on a self-luminous display panel in the first embodiment of the present invention.

[0054] like Figures 1 to 3 As shown, a self-luminous display device provided by the first embodiment of the present invention comprises a dimming box 10, a quarter wave plate 20 and a self-luminous display panel 30 which are stacked in sequence, the dimming box 10 and the quarter wave plate 20 are both arranged on the light-emitting side of the self-luminous display panel 30, and the quarter wave plate 20 is arranged between the dimming box 10 and the self-luminous display panel 30. The self-luminous display panel 30 is used to control the display of grayscale images, and the self-luminous display panel 30 is provided with a reflective structure 33 for reflecting ambient light.

[0055] The dimming box 10 includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a dye liquid crystal layer 13 located between the first substrate 11 and the second substrate 12. The dye liquid crystal layer 13 includes liquid crystal molecules 131 and dye molecules 132 that are mixed with each other. The dye molecules 132 rotate synchronously with the liquid crystal molecules 131. The liquid crystal molecules 131 are positive liquid crystal molecules (liquid crystal molecules with positive dielectric anisotropy). The dye molecules 132 can be black dye molecules or purple-black dye molecules. The light absorption capacity of the long axis of the dye molecules is greater than that of the short axis, that is, the dye molecules 132 have the characteristics that the long axis has a strong light absorption capacity and the short axis has a very weak light absorption capacity. Figure 1 As shown, in the initial state, the positive liquid crystal molecules and the dye molecules 132 are aligned parallel to the first substrate 11 and the second substrate 12, and the alignment direction of the dye liquid crystal layer 13 close to the first substrate 11 and the alignment direction close to the second substrate 12 are parallel to each other or anti-parallel. The angle between the alignment direction of the dye liquid crystal layer 13 and the fast-slow axis of the quarter wave plate 20 is between 0-90°, and optionally, the angle between the alignment direction of the dye liquid crystal layer 13 and the fast-slow axis of the quarter wave plate 20 is 45°. It can be understood that the first alignment layer is provided on the side of the first substrate 11 facing the dye liquid crystal layer 13, and the second alignment layer is provided on the side of the second substrate 12 facing the dye liquid crystal layer 13. The first alignment layer and the second alignment layer are used to align the dye liquid crystal layer 13, and the alignment directions of the first alignment layer and the second alignment layer are parallel to each other, and the angle between the first alignment layer and the fast-slow axis of the quarter wave plate 20 is between 0-90°. Of course, the dye liquid crystal layer 13 may have a smaller pre-tilt angle (for example, less than 5°) during the initial alignment, that is, the liquid crystal molecules 131 and the dye molecules 132 initially form a smaller angle with the first substrate 11 and the second substrate 12, which can accelerate the deflection of the positive liquid crystal molecules and the dye molecules 132 toward the vertical direction when switching to a narrow viewing angle.

[0056] An auxiliary electrode 111 is provided on the first substrate 11, and a control electrode 121 cooperating with the auxiliary electrode 111 is provided on the second substrate 12. The dimming box 10 is controlled to switch between a wide viewing angle and a narrow viewing angle by controlling the voltage applied to the auxiliary electrode 111 and the control electrode 121. In this embodiment, the auxiliary electrode 111 and the control electrode 121 are both planar electrodes arranged on the entire surface, so that all areas of the display device can be controlled to switch between a wide viewing angle and a narrow viewing angle at the same time.

[0057] Furthermore, an insulating layer covering the auxiliary electrode 111 is disposed on the first substrate 11 , and / or an insulating layer covering the control electrode 121 is disposed on the second substrate 12 , so as to avoid a short circuit problem between the auxiliary electrode 111 and the control electrode 121 .

[0058] In this embodiment, the auxiliary electrode 111 and the control electrode 121 are both planar electrodes arranged on the entire surface. The auxiliary electrode 111 is a planar electrode that covers the entire surface of the first substrate 11, and the control electrode 121 is a planar electrode that covers the entire surface of the second substrate 12, so that the self-luminous display device can simultaneously realize a wide viewing angle mode of the entire surface, a narrow viewing angle mode of the entire surface, and a mirror reflection mode of the entire surface.

[0059] In the wide viewing angle mode, the self-luminous display panel 30 is in the open state, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are in a flat position, and the angle between them and the fast and slow axes of the quarter wave plate 20 is between 0-90°, and optionally, the angle between the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 and the quarter wave plate 20 is 45°; the light emitted by the self-luminous display panel 30 can pass through the quarter wave plate 20 and the dimming box 10 normally, while the ambient light can only pass through the quarter wave plate 20 after passing through the dimming box 10 and the quarter wave plate 20 and being reflected by the reflective structure 33, and then be absorbed by the dye molecules 132 of the dimming box 10, thereby avoiding the reflective structure 33 on the self-luminous display panel from reflecting the ambient light, achieving an anti-glare effect, and enhancing the wide viewing angle display effect. In the narrow viewing angle mode, the self-luminous display panel 30 is in the open state, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are in a tilted posture, and the dye liquid crystal layer 13 absorbs the light of the large viewing angle to achieve the narrow viewing angle effect of the large viewing angle light collection, but the effect of anti-reflection of ambient light will be reduced. In the mirror reflection mode, the self-luminous display panel 30 is in the closed state, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are in a tilted posture or a vertical posture, and the reflective structure 33 on the self-luminous display panel 30 can reflect ambient light to achieve a mirror reflection effect.

[0060] The self-luminous display panel 30 is, for example, an OLED (Organic Light-Emitting Diode) display or a Micro LED (Micro Light Emitting Diode) display. Figure 2 and Figure 3As shown, the self-luminous display panel 30 includes a substrate 31, a light-emitting unit 32 disposed on the substrate 31, a plurality of first scan lines 331, a plurality of first data lines 332 and a plurality of first thin film transistors 333 are disposed on the substrate 31, the plurality of first scan lines 331 and the plurality of first data lines 332 are insulated from each other and cross-defined to form a plurality of first pixel units P1, each of the first pixel units P1 is provided with a light-emitting unit 32, an anode 34 and a first thin film transistor 333, the anode 34 is conductively connected to the first scan line 331 and the first data line 332 adjacent to the first thin film transistor 333 through the first thin film transistor 333. The substrate 31 is further provided with a cathode (not shown) on the side of the light-emitting unit 32 away from the anode 34, the light-emitting unit 32 is controlled to emit light through the anode 34 and the cathode, and the light-emitting unit 32 may be made of an organic light-emitting material. The first thin film transistor 333 includes a first gate, a first active layer, a first drain and a first source. The first gate and the first scan line 331 are located in the same layer and are electrically connected. The first gate and the first active layer are isolated by a gate insulating layer. The first source is electrically connected to the first data line 332. The first drain is electrically connected to the anode 34 through a contact hole. For a more detailed introduction to the self-luminous display panel 30, please refer to the prior art, which will not be repeated here.

[0061] Furthermore, the reflective structure 33 is a grid-like structure and is located between the first pixel units P1 of the self-luminous display panel 30 and in the non-display area, thereby preventing the reflective structure 33 from affecting the normal display of the self-luminous display panel 30. Optionally, since the metal electrodes (first scan lines 331, first data lines 332) inside the self-luminous display panel 30 are made of metals such as molybdenum and aluminum, and have a good reflective effect, the reflective structure 33 includes the first scan lines 331 and the first data lines 332 on the self-luminous display panel 30, so that the reflective effect can be achieved by using the metal electrodes inside the self-luminous display panel 30 to simplify the structure of the self-luminous display device. Of course, in other embodiments, the reflective structure 33 can also use a one-way perspective film and directly attach it to the surface of the self-luminous display panel 30 close to the quarter-wave plate 20. The one-way perspective film has no polarization effect on light. The light emitted by the self-luminous display panel 30 is still natural light after passing through the one-way perspective film, and the ambient light is still natural light after being reflected by the one-way perspective film. Among them, one-way vision film (also called one-way film, mirror film, etc.) refers to a film that can make the glass have a high reflectivity for visible light when it is attached to the glass. For example, when the outdoor is brighter than the indoor, the one-way vision film is similar to an ordinary mirror. The outdoor scene cannot be seen from the indoor, but the indoor scene can be seen clearly. One-way vision film is commonly used in home life glass film or car glass film.

[0062] The first substrate 11, the second substrate 12 and the base 31 can be made of transparent materials such as glass, acrylic and polycarbonate. The auxiliary electrode 111, the control electrode 121, the anode 34 and the cathode can be made of transparent conductive materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0063] The present application also provides a driving method for a self-luminous display device, which is used to drive the self-luminous display device as described above. The driving method includes:

[0064] Figure 4 1 is a driving signal waveform diagram of the self-luminous display device in the first embodiment of the present invention in the wide viewing angle mode. Figure 5 Schematic diagram of the structure of the self-luminous display device in the first embodiment of the present invention in the wide viewing angle mode. Figure 4 and Figure 5 As shown, in the wide viewing angle mode, the self-luminous display panel 30 is controlled to open, and a common signal Vcom is applied to the auxiliary electrode 111, and a wide viewing angle signal, such as a first voltage V1, is applied to the control electrode 121. The voltage difference between the first voltage V1 and the common voltage signal Vcom is zero or less than a first preset value (0.3V). At this time, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are basically not deflected and maintain their initial lying posture, and the angle between the liquid crystal molecules 131 and the dye molecules 132 and the fast and slow axes of the quarter wave plate 20 is between 0-90°, for example, 45°. The light emitted by the self-luminous display panel 30 can pass through the quarter wave plate 20 and the dimming box 10 normally to achieve wide viewing angle display.

[0065] Figure 6 Schematic diagram of the optical path principle of the self-luminous display device in the wide viewing angle mode in the first embodiment of the present invention. Figure 6 As shown, in the wide viewing angle mode, the light emitted by the self-luminous display panel 30 can pass through the quarter wave plate 20 normally, and when passing through the dye liquid crystal layer 13, the light parallel to the dye molecules 132 will be absorbed, while the light perpendicular to the dye molecules 132 can pass through the dye liquid crystal layer 13 to achieve normal display of the picture; when the ambient light I passes through the dye liquid crystal layer 13, the light parallel to the dye molecules 132 will be absorbed, while the light perpendicular to the dye molecules 132 can pass through the dye liquid crystal layer 13, and when passing through the quarter wave plate 20 again, the linear polarized light (for example, 0°) is changed into circularly polarized light (for example, right-handed), the circularly polarized light is reflected by the reflective structure 33 and becomes circularly polarized light (left-handed) with the opposite rotation direction, and the circularly polarized light (left-handed) is changed from the circularly polarized light (left-handed) to linearly polarized light (90°) when passing through the quarter wave plate 20 again, and at this time, the linear polarized light (90°) is parallel to the dye molecules 132 and absorbed by the dye molecules 132. This prevents the reflective structure 33 on the self-luminous display panel from reflecting ambient light, thereby achieving an anti-glare effect and enhancing the wide-viewing angle display effect.

[0066] Figure 7 1 is a driving signal waveform diagram of the self-luminous display device in the narrow viewing angle mode in the first embodiment of the present invention. Figure 8 Schematic diagram of the structure of the self-luminous display device in the narrow viewing angle mode in the first embodiment of the present invention. Figure 7 and Figure 8 As shown, in the narrow viewing angle mode, the self-luminous display panel 30 is controlled to be turned on, and a common signal Vcom is applied to the auxiliary electrode 111, and a narrow viewing angle signal, such as a second voltage V2 (such as 5V) is applied to the control electrode 121. The voltage difference between the second voltage V2 and the common voltage signal Vcom is greater than a second preset value (such as 2V) and less than a third preset value (such as 7V). A vertical electric field E1 (such as 2V) is formed between the auxiliary electrode 111 and the control electrode 121. Figure 8 As shown by the middle arrow, since the positive liquid crystal molecules rotate in a direction perpendicular to the electric field lines under the action of the electric field, the positive liquid crystal molecules are deflected under the action of the vertical electric field E1, and the dye molecules 132 are deflected together with the liquid crystal molecules 131, so that the positive liquid crystal molecules and the dye molecules 132 are in a tilted posture, and the light of a large viewing angle is absorbed by the dye molecules 132, thereby presenting a narrow viewing angle effect of collecting light of a large viewing angle. Since the positive liquid crystal molecules and the dye molecules 132 are in a tilted posture, the polarization effect of the dye molecules 132 on the light becomes worse, so that the effect of anti-reflection of ambient light in the narrow viewing angle mode is reduced.

[0067] Fig. 9 1 is a driving signal waveform diagram of the self-luminous display device in the mirror reflection mode in the first embodiment of the present invention. Fig.10 Schematic diagram of the structure of the self-luminous display device in the first embodiment of the present invention in the mirror reflection mode. Fig. 9 and Fig.10 As shown, in the mirror reflection mode, the self-luminous display panel 30 is controlled to be turned off, and a common signal Vcom is applied to the auxiliary electrode 111, and a reflection signal, such as a third voltage V3 (for example, 10V), is applied to the control electrode 121. The voltage difference between the third voltage V3 and the common voltage signal Vcom is greater than a second preset value (for example, 2V), and a vertical electric field E2 (such as 10V) is formed between the auxiliary electrode 111 and the control electrode 121. Fig.10As shown by the arrow in the middle, since the positive liquid crystal molecules will rotate in a direction perpendicular to the electric field line under the action of the electric field, the positive liquid crystal molecules will be deflected under the action of the vertical electric field E2, and the dye molecules 132 will be deflected together with the liquid crystal molecules 131, so that the positive liquid crystal molecules and the dye molecules 132 are perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12, and the positive liquid crystal molecules and the dye molecules 132 change from a flat posture to a vertical posture, and the dye molecules 132 have basically no polarization effect on the light, and the ambient light can pass through the dye liquid crystal layer 13 normally, and then be reflected back by the reflective structure 33 to achieve a mirror reflection effect. Of course, in other embodiments, the third voltage V3 can also be other values ​​(for example, 5V) to control the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 to be in a tilted posture. At this time, the polarization effect of the dye molecules 132 on the light is poor, so that the reflection effect of the self-luminous display device on the ambient light becomes poor. In the mirror reflection mode, it can have an anti-glare effect, so that it is more suitable for a vehicle rearview mirror. The third voltage V3 can be set according to actual needs, so as to adjust the anti-glare effect.

[0068] Fig.11 Schematic diagram of the optical path principle of the self-luminous display device in the mirror reflection mode in the first embodiment of the present invention. Fig.11 As shown, in the mirror reflection mode, since the positive liquid crystal molecules and the dye molecules 132 in the dye liquid crystal layer 13 are in a vertical posture, the dye molecules 132 have basically no polarization effect on the light. When the ambient light I passes through the dye liquid crystal layer 13, no polarization effect will occur. It can pass through the quarter wave plate 20 normally, and then be reflected back by the reflective structure 33 and pass through the quarter wave plate 20 and the dye liquid crystal layer 13 normally, thereby achieving a mirror reflection effect.

[0069] [Example 2]

[0070] Fig.12 It is a schematic structural diagram of the self-luminous display device in the initial state in the second embodiment of the present invention. Fig.13 It is a schematic diagram of the planar structure of the self-luminous display device in the second embodiment of the present invention. Fig.14 FIG. 1 is a schematic diagram of the planar structure of the control electrode in the second embodiment of the present invention. Fig.12 and Fig.14 As shown, the self-luminous display device and driving method provided in the second embodiment of the present invention are similar to those in the first embodiment ( Figures 1 to 11 ) are basically the same, except that:

[0071] In this embodiment, the self-luminous display device has an identification pattern area 110 and a non-identification pattern area 120, and the control electrode 121 includes a first control electrode 121a corresponding to the identification pattern area 110 and a second control electrode 121b corresponding to the non-identification pattern area 120. The first control electrode 121a and the second control electrode 121b are insulated and spaced apart from each other, so that different voltage signals can be applied to the first control electrode 121a and the second control electrode 121b respectively in the identification display mode. The pattern of the identification pattern area 110 can be set according to actual needs, and the pattern of the first control electrode 121a is the same as the pattern of the identification pattern area 110. However, when the dimming box 10 is manufactured, the pattern of the identification pattern area 110 cannot be changed, and only one identification pattern can be displayed in the identification display mode.

[0072] Among them, in the wide viewing angle mode, the self-luminous display panel 30 is in the open state, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are in a lying posture, and the angle between them and the fast and slow axes of the quarter wave plate 20 is between 0-90°. Optionally, the angle between the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 and the quarter wave plate 20 is 45°; the light emitted by the self-luminous display panel 30 can pass through the quarter wave plate 20 and the dimming box 10 normally, while the ambient light can only pass through the quarter wave plate 20 after passing through the dimming box 10 and the quarter wave plate 20 and being reflected by the reflective structure 33, and then be absorbed by the dye molecules 132 of the dimming box 10, thereby avoiding the reflective structure 33 on the self-luminous display panel to reflect the ambient light, thereby achieving an anti-glare effect to enhance the wide viewing angle display effect. In the narrow viewing angle mode, the self-luminous display panel 30 is in the open state, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are in a tilted posture, and the dye liquid crystal layer 13 absorbs the light of the large viewing angle to achieve the narrow viewing angle effect of the large viewing angle light collection, but the effect of anti-reflection of ambient light will be reduced. In the mirror reflection mode, the self-luminous display panel 30 is in the closed state, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are in a tilted posture or a vertical posture, and the reflective structure 33 on the self-luminous display panel 30 can reflect ambient light to achieve a mirror reflection effect. In the identification display mode, the self-luminous display panel 30 is in a closed state, and the liquid crystal molecules 131 and the dye molecules 132 corresponding to the identification pattern area 110 are in a tilted posture or a vertical posture; while the liquid crystal molecules 131 and the dye molecules 132 corresponding to the non-identification pattern area 120 are in a flat posture, and the angle between them and the fast and slow axes of the quarter-wave plate 20 is between 0-90°. Optionally, the angle between the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 and the quarter-wave plate 20 is 45°, so that the identification pattern area 110 can reflect ambient light, while the non-identification pattern area 120 appears in a dark state.

[0073] In this embodiment, the first control electrode 121a and the second control electrode 121b are located in the same layer, wherein the non-logo pattern area 120 surrounds the periphery of the logo pattern area 110, and the second control electrode 121b surrounds the periphery of the first control electrode 121a, therefore, an additional signal wire layer may be provided to conductively connect the first control electrode 121a to the binding area of ​​the non-display area, thereby facilitating the application of a control signal to the first control electrode 121a. Of course, in other embodiments, the first control electrode 121a and the second control electrode 121b are located in different layers, so there is no need to additionally provide a signal wire layer, however, since the first control electrode 121a and the second control electrode 121b are located in different layers, the distances from the auxiliary electrode 111 are different, which has a certain impact on the narrow viewing angle effect.

[0074] The present application also provides a driving method for a self-luminous display device, which is used to drive the self-luminous display device as described above. The driving method includes:

[0075] In the wide viewing angle mode, the self-luminous display panel 30 is controlled to open, and a common signal Vcom is applied to the auxiliary electrode 111, and a wide viewing angle signal is applied to the control electrode 121, that is, the first control electrode 121a and the second control electrode 121b are both applied with a wide viewing angle signal, such as a first voltage V1, and the voltage difference between the first voltage V1 and the common voltage signal Vcom is zero or less than a first preset value (0.3V). At this time, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are basically not deflected and maintain their initial lying posture, and the angle between the liquid crystal molecules 131 and the dye molecules 132 and the fast and slow axes of the quarter wave plate 20 is between 0-90°, for example, 45°, and the light emitted by the self-luminous display panel 30 can pass through the quarter wave plate 20 and the dimming box 10 normally to achieve wide viewing angle display.

[0076] refer to Figure 6As shown, in the wide viewing angle mode, the light emitted by the self-luminous display panel 30 can pass through the quarter wave plate 20 normally, and when passing through the dye liquid crystal layer 13, the light parallel to the dye molecules 132 will be absorbed, while the light perpendicular to the dye molecules 132 can pass through the dye liquid crystal layer 13 to achieve normal display of the picture; when the ambient light I passes through the dye liquid crystal layer 13, the light parallel to the dye molecules 132 will be absorbed, while the light perpendicular to the dye molecules 132 can pass through the dye liquid crystal layer 13, and when passing through the quarter wave plate 20 again, the linear polarized light (for example, 0°) is changed into circularly polarized light (for example, right-handed), the circularly polarized light is reflected by the reflective structure 33 and becomes circularly polarized light (left-handed) with the opposite rotation direction, and the circularly polarized light (left-handed) is changed from the circularly polarized light (left-handed) to linearly polarized light (90°) when passing through the quarter wave plate 20 again, and at this time, the linear polarized light (90°) is parallel to the dye molecules 132 and absorbed by the dye molecules 132. This prevents the reflective structure 33 on the self-luminous display panel from reflecting ambient light, thereby achieving an anti-glare effect and enhancing the wide-viewing angle display effect.

[0077] In the narrow viewing angle mode, the self-luminous display panel 30 is controlled to open, and a common signal Vcom is applied to the auxiliary electrode 111, and a narrow viewing angle signal is applied to the control electrode 121, that is, the first control electrode 121a and the second control electrode 121b are both applied with a narrow viewing angle signal, such as a second voltage V2 (for example, 5V), and the voltage difference between the second voltage V2 and the common voltage signal Vcom is greater than a second preset value (for example, 2V) and less than a third preset value (for example, 7V), and a vertical electric field is formed between the auxiliary electrode 111 and the control electrode 121. Since the positive liquid crystal molecules will rotate in a direction perpendicular to the electric field lines under the action of the electric field, the positive liquid crystal molecules will be deflected under the action of the vertical electric field, and the dye molecules 132 will be deflected together with the liquid crystal molecules 131, so that the positive liquid crystal molecules and the dye molecules 132 are in a tilted posture, and the light with a large viewing angle is absorbed by the dye molecules 132, thereby presenting a narrow viewing angle effect of collecting light with a large viewing angle. Since the positive liquid crystal molecules and the dye molecules 132 are in a tilted posture, the polarization effect of the dye molecules 132 on light becomes worse, so that the effect of anti-reflection of ambient light in the narrow viewing angle mode is reduced.

[0078] In the mirror reflection mode, the self-luminous display panel 30 is controlled to be turned off, and a common signal Vcom is applied to the auxiliary electrode 111, and a reflection signal is applied to the control electrode 121, that is, the first control electrode 121a and the second control electrode 121b are both applied with a reflection signal, such as a third voltage V3 (for example, 10V), and the voltage difference between the third voltage V3 and the common voltage signal Vcom is greater than a second preset value (for example, 2V), and a vertical electric field is formed between the auxiliary electrode 111 and the control electrode 121. Since the positive liquid crystal molecules will rotate in a direction perpendicular to the electric field lines under the action of the electric field, the positive liquid crystal molecules will be deflected under the action of the vertical electric field, and the dye molecules 132 will be deflected together with the liquid crystal molecules 131, so that the positive liquid crystal molecules and the dye molecules 132 are perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12, and the positive liquid crystal molecules and the dye molecules 132 change from a lying posture to a vertical posture, and the dye molecules 132 have basically no polarization effect on light, and the ambient light can pass through the dye liquid crystal layer 13 normally, and then be reflected back by the reflective structure 33 to achieve a mirror reflection effect. Of course, in other embodiments, the third voltage V3 may also be other values ​​(e.g., 5V) to control the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 to be tilted. At this time, the polarization effect of the dye molecules 132 on light is poor, so that the self-luminous display device has a poor reflection effect on ambient light. In the mirror reflection mode, it can have an anti-glare effect, so that it is more suitable for a vehicle rearview mirror. The third voltage V3 can be set according to actual needs, so that the anti-glare effect can be adjusted.

[0079] refer to Fig.11 As shown, in the mirror reflection mode, since the positive liquid crystal molecules and the dye molecules 132 in the dye liquid crystal layer 13 are in a vertical posture, the dye molecules 132 have basically no polarization effect on the light. When the ambient light I passes through the dye liquid crystal layer 13, no polarization effect will occur. It can pass through the quarter wave plate 20 normally, and then be reflected back by the reflective structure 33 and pass through the quarter wave plate 20 and the dye liquid crystal layer 13 normally, thereby achieving a mirror reflection effect.

[0080] Fig.15 FIG. 1 is a schematic diagram of the structure of the self-luminous display device in the second embodiment of the present invention in the identification display mode. Fig.15 As shown, in the identification display mode, the self-luminous display panel 30 is controlled to be turned off, and the common signal Vcom is applied to the auxiliary electrode 111, and a bright state signal, such as a third voltage V3 (for example, 10V), is applied to the first control electrode 121a. The voltage difference between the third voltage V3 and the common voltage signal Vcom is greater than a second preset value (for example, 2V), and a vertical electric field E2 (such as 10V) is formed between the auxiliary electrode 111 and the control electrode 121. Fig.15As shown by the middle arrow, since the positive liquid crystal molecules will rotate in a direction perpendicular to the electric field lines under the action of the electric field, the positive liquid crystal molecules will be deflected under the action of the vertical electric field E2, and the dye molecules 132 will be deflected together with the liquid crystal molecules 131, so that the positive liquid crystal molecules and the dye molecules 132 in the identification pattern area 110 are perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12, and the positive liquid crystal molecules and the dye molecules 132 in the identification pattern area 110 change from a lying posture to a vertical posture, and the dye molecules 132 have basically no polarization effect on the light, and the ambient light in the identification pattern area 110 can pass through the dye liquid crystal layer 13 normally, and then be reflected back by the reflective structure 33 to achieve a mirror reflection effect, so that the identification pattern area 110 is in a bright state. And a dark state signal, such as a first voltage V1, is applied to the second control electrode 121b, and the voltage difference between the first voltage V1 and the common voltage signal Vcom is zero or less than a first preset value (0.3V). At this time, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 of the non-logo pattern area 120 are basically not deflected and maintain the initial flat posture, and the angle between the liquid crystal molecules 131 and the dye molecules 132 and the fast and slow axes of the quarter wave plate 20 is between 0-90°, such as 45°, and the non-logo pattern area 120 cannot reflect ambient light, so that the non-logo pattern area 120 is in a dark state. Since there is a difference in brightness between the logo pattern area 110 and the non-logo pattern area 120, the self-luminous display device can display the logo pattern (LOGO) corresponding to the logo pattern area 110, thereby enhancing the brand effect of the product. Of course, in other embodiments, the third voltage V3 can also be other values ​​(for example, 5V) to control the liquid crystal molecules 131 and the dye molecules 132 of the identification pattern area 110 to be in a tilted posture. At this time, the dye molecules 132 have a poor polarization effect on light, thereby making the reflection effect of the identification pattern area 110 on ambient light worse, that is, the brightness becomes darker, but its brightness is also greater than the brightness of the non-identification pattern area 120.

[0081] In the logo display mode, the logo pattern area 110 can refer to Fig.11 As shown, since the positive liquid crystal molecules and the dye molecules 132 in the dye liquid crystal layer 13 are in a vertical posture, the dye molecules 132 have basically no polarization effect on the light, and the ambient light I will not be polarized when passing through the dye liquid crystal layer 13, and can pass through the quarter wave plate 20 normally, and then be reflected back by the reflective structure 33 and pass through the quarter wave plate 20 and the dye liquid crystal layer 13 normally, thereby achieving a mirror reflection effect, so that the logo pattern area 110 is bright. For the non-logo pattern area 120, please refer to Figure 6As shown, when the ambient light I of the non-marking pattern area 120 passes through the dye liquid crystal layer 13, the light parallel to the dye molecules 132 will be absorbed, while the light perpendicular to the dye molecules 132 can pass through the dye liquid crystal layer 13, and then change from linearly polarized light (e.g., 0°) to circularly polarized light (e.g., right-handed) when passing through the quarter-wave plate 20. The circularly polarized light is reflected by the reflective structure 33 and changes into circularly polarized light (left-handed) with the opposite rotation direction. When the circularly polarized light (left-handed) passes through the quarter-wave plate 20 again, it changes from circularly polarized light (left-handed) to linearly polarized light (90°). At this time, the linearly polarized light (90°) is parallel to the dye molecules 132 and is absorbed by the dye molecules 132, thereby making the non-marking pattern area 120 dark.

[0082] It should be understood by those skilled in the art that the rest of the structure and working principle of this embodiment are the same as those of the first embodiment and will not be described in detail here.

[0083] [Example 3]

[0084] Fig.16 It is a schematic structural diagram of the self-luminous display device in the initial state in the third embodiment of the present invention. Fig.17 Schematic diagram of the planar structure of the second substrate in the third embodiment of the present invention. Fig.16 and Fig.17 As shown, the self-luminous display device and driving method provided in the third embodiment of the present invention are similar to those in the first embodiment ( Figures 1 to 11 )、Example 2 ( Figures 12 to 15 ) are basically the same, except that:

[0085] In this embodiment, a plurality of second scan lines 101 and a plurality of second data lines 102 are provided on the second substrate 12, the second scan lines 101 and the second data lines 102 are mutually insulated and cross-defined to form a plurality of second pixel units P2, the control electrode 121 includes a plurality of electrode blocks 121c corresponding to the second pixel units P2, the second substrate 12 is provided with a second thin film transistor 103 in each second pixel unit P2, the electrode block 121c is electrically connected to the second scan line 101 and the second data line 102 adjacent to the second thin film transistor 103 through the second thin film transistor 103. That is, in this application, by dividing the control electrode 121 into a plurality of mutually insulated electrode blocks 121c, the electrode blocks 121c correspond to the second pixel units P2 one by one, and then the electrode blocks 121c are electrically connected to the second scan line 101 and the second data line 102 adjacent to the second thin film transistor 103 through the second thin film transistor 103, so as to realize the individual control of the electrical signal on each electrode block 121c. Thus, by applying corresponding grayscale voltages to different electrode blocks 121c, the second pixel unit P2 can present different brightnesses, so as to realize reflective display using ambient light. The second thin film transistor 103 includes a second gate, a second active layer, a second drain and a second source. The second gate is located in the same layer as the second scan line 101 and is electrically connected. The second gate is isolated from the second active layer by a gate insulating layer. The second source is electrically connected to the second data line 102. The second drain is electrically connected to the electrode block 121c through a contact hole.

[0086] The first substrate 11 and the second substrate 12 are both colorless and transparent in the area corresponding to the second pixel unit P2, that is, transparent substrates are used on the first substrate 11 and the second substrate 12, and no color resist layer is provided. Therefore, in the reflective display, a black and white picture can be displayed, and in the transmissive display using the self-luminous display panel 30, a color picture can be displayed, so that the self-luminous display device can switch between black and white pictures and color pictures.

[0087] Furthermore, the first pixel unit P1 and the second pixel unit P2 may correspond one to one. Of course, a plurality of first pixel units P1 may correspond to one second pixel unit P2, for example, 4:1, 9:1, etc.

[0088] The present application also provides a driving method for a self-luminous display device, which is used to drive the self-luminous display device as described above. The driving method includes:

[0089] In the wide viewing angle mode, the self-luminous display panel 30 is controlled to open, and a common signal Vcom is applied to the auxiliary electrode 111, and a wide viewing angle signal is applied to the control electrode 121, that is, a wide viewing angle signal is applied to all electrode blocks 121c, such as a first voltage V1, and the voltage difference between the first voltage V1 and the common voltage signal Vcom is zero or less than a first preset value (0.3V). At this time, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 are basically not deflected and maintain their initial lying posture, and the angle between the liquid crystal molecules 131 and the dye molecules 132 and the fast and slow axes of the quarter wave plate 20 is between 0-90°, for example, 45°, and the light emitted by the self-luminous display panel 30 can pass through the quarter wave plate 20 and the dimming box 10 normally to achieve wide viewing angle display.

[0090] refer to Figure 6 As shown, in the wide viewing angle mode, the light emitted by the self-luminous display panel 30 can pass through the quarter wave plate 20 normally, and when passing through the dye liquid crystal layer 13, the light parallel to the dye molecules 132 will be absorbed, while the light perpendicular to the dye molecules 132 can pass through the dye liquid crystal layer 13 to achieve normal display of the picture; when the ambient light I passes through the dye liquid crystal layer 13, the light parallel to the dye molecules 132 will be absorbed, while the light perpendicular to the dye molecules 132 can pass through the dye liquid crystal layer 13, and when passing through the quarter wave plate 20 again, the linear polarized light (for example, 0°) is changed into circularly polarized light (for example, right-handed), the circularly polarized light is reflected by the reflective structure 33 and becomes circularly polarized light (left-handed) with the opposite rotation direction, and the circularly polarized light (left-handed) is changed from the circularly polarized light (left-handed) to linearly polarized light (90°) when passing through the quarter wave plate 20 again, and at this time, the linear polarized light (90°) is parallel to the dye molecules 132 and absorbed by the dye molecules 132. This prevents the reflective structure 33 on the self-luminous display panel from reflecting ambient light, thereby achieving an anti-glare effect and enhancing the wide-viewing angle display effect.

[0091] In the narrow viewing angle mode, the self-luminous display panel 30 is controlled to open, and a common signal Vcom is applied to the auxiliary electrode 111, and a narrow viewing angle signal is applied to the control electrode 121, that is, a narrow viewing angle signal is applied to all electrode blocks 121c, such as a second voltage V2 (for example, 5V), and the voltage difference between the second voltage V2 and the common voltage signal Vcom is greater than a second preset value (for example, 2V) and less than a third preset value (for example, 7V), and a vertical electric field is formed between the auxiliary electrode 111 and the control electrode 121. Since the positive liquid crystal molecules will rotate in a direction perpendicular to the electric field lines under the action of the electric field, the positive liquid crystal molecules will be deflected under the action of the vertical electric field, and the dye molecules 132 will be deflected together with the liquid crystal molecules 131, so that the positive liquid crystal molecules and the dye molecules 132 are in a tilted posture, and the light with a large viewing angle is absorbed by the dye molecules 132, thereby presenting a narrow viewing angle effect of collecting light with a large viewing angle. Since the positive liquid crystal molecules and the dye molecules 132 are in a tilted posture, the polarization effect of the dye molecules 132 on light becomes worse, so that the effect of anti-reflection of ambient light in the narrow viewing angle mode is reduced.

[0092] In the mirror reflection mode, the self-luminous display panel 30 is controlled to be turned off, and a common signal Vcom is applied to the auxiliary electrode 111, and a reflection signal is applied to the control electrode 121, that is, a reflection signal is applied to all electrode blocks 121c, such as a third voltage V3 (for example, 10V), and the voltage difference between the third voltage V3 and the common voltage signal Vcom is greater than a second preset value (for example, 2V), and a vertical electric field is formed between the auxiliary electrode 111 and the control electrode 121. Since the positive liquid crystal molecules will rotate in a direction perpendicular to the electric field lines under the action of the electric field, the positive liquid crystal molecules will be deflected under the action of the vertical electric field, and the dye molecules 132 will be deflected together with the liquid crystal molecules 131, so that the positive liquid crystal molecules and the dye molecules 132 are perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12, and the positive liquid crystal molecules and the dye molecules 132 change from a lying posture to a vertical posture, and the dye molecules 132 have basically no polarization effect on light, and the ambient light can pass through the dye liquid crystal layer 13 normally, and then be reflected back by the reflective structure 33 to achieve a mirror reflection effect. Of course, in other embodiments, the third voltage V3 may also be other values ​​(e.g., 5V) to control the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 to be tilted. At this time, the polarization effect of the dye molecules 132 on light is poor, so that the self-luminous display device has a poor reflection effect on ambient light. In the mirror reflection mode, it can have an anti-glare effect, so that it is more suitable for a vehicle rearview mirror. The third voltage V3 can be set according to actual needs, so that the anti-glare effect can be adjusted.

[0093] refer to Fig.11As shown, in the mirror reflection mode, since the positive liquid crystal molecules and the dye molecules 132 in the dye liquid crystal layer 13 are in a vertical posture, the dye molecules 132 have basically no polarization effect on the light. When the ambient light I passes through the dye liquid crystal layer 13, no polarization effect will occur. It can pass through the quarter wave plate 20 normally, and then be reflected back by the reflective structure 33 and pass through the quarter wave plate 20 and the dye liquid crystal layer 13 normally, thereby achieving a mirror reflection effect.

[0094] In the logo display mode, the self-luminous display panel 30 is controlled to be turned off, and a common signal Vcom is applied to the auxiliary electrode 111, and a bright state signal, such as a third voltage V3 (for example, 10V), is applied to the electrode block 121c corresponding to the logo pattern area 110. The voltage difference between the third voltage V3 and the common voltage signal Vcom is greater than a second preset value (for example, 2V), and a vertical electric field is formed between the auxiliary electrode 111 and the control electrode 121. Since the positive liquid crystal molecules will rotate in a direction perpendicular to the electric field lines under the action of the electric field, the positive liquid crystal molecules will emit light under the action of the vertical electric field. The dye molecules 132 are deflected along with the liquid crystal molecules 131, so that the positive liquid crystal molecules and the dye molecules 132 in the logo pattern area 110 are perpendicular or approximately perpendicular to the first substrate 11 and the second substrate 12, and the positive liquid crystal molecules and the dye molecules 132 in the logo pattern area 110 change from a lying posture to a vertical posture, and the dye molecules 132 have basically no polarization effect on the light, and the ambient light in the logo pattern area 110 can pass through the dye liquid crystal layer 13 normally, and then be reflected back by the reflective structure 33 to achieve a mirror reflection effect, so that the logo pattern area 110 is in a bright state. And a dark state signal, such as a first voltage V1, is applied to the electrode block 121c corresponding to the non-logo pattern area 120. The voltage difference between the first voltage V1 and the common voltage signal Vcom is zero or less than a first preset value (0.3V). At this time, the liquid crystal molecules 131 and the dye molecules 132 in the dye liquid crystal layer 13 of the non-logo pattern area 120 are basically not deflected and maintain the initial flat posture, and the angle between the liquid crystal molecules 131 and the dye molecules 132 and the fast and slow axes of the quarter wave plate 20 is between 0-90°, such as 45°. The non-logo pattern area 120 cannot reflect ambient light, so that the non-logo pattern area 120 is in a dark state. Since there is a difference in brightness between the logo pattern area 110 and the non-logo pattern area 120, the self-luminous display device can display the logo pattern (LOGO) corresponding to the logo pattern area 110, thereby enhancing the brand effect of the product. Of course, in other embodiments, the third voltage V3 can also be other values ​​(for example, 5V) to control the liquid crystal molecules 131 and the dye molecules 132 of the identification pattern area 110 to be in a tilted posture. At this time, the dye molecules 132 have a poor polarization effect on light, thereby making the reflection effect of the identification pattern area 110 on ambient light worse, that is, the brightness becomes darker, but its brightness is also greater than the brightness of the non-identification pattern area 120.

[0095] In this embodiment, since each electrode block 121c can be controlled individually, the pattern of the identification pattern area 110 can be adjusted arbitrarily according to actual needs, which is more practical.

[0096] In the logo display mode, the logo pattern area 110 can refer to Fig.11 As shown, since the positive liquid crystal molecules and the dye molecules 132 in the dye liquid crystal layer 13 are in a vertical posture, the dye molecules 132 have basically no polarization effect on the light, and the ambient light I will not be polarized when passing through the dye liquid crystal layer 13, and can pass through the quarter wave plate 20 normally, and then be reflected back by the reflective structure 33 and pass through the quarter wave plate 20 and the dye liquid crystal layer 13 normally, thereby achieving a mirror reflection effect, so that the logo pattern area 110 is bright. For the non-logo pattern area 120, please refer to Figure 6 As shown, when the ambient light I of the non-marking pattern area 120 passes through the dye liquid crystal layer 13, the light parallel to the dye molecules 132 will be absorbed, while the light perpendicular to the dye molecules 132 can pass through the dye liquid crystal layer 13, and then change from linearly polarized light (e.g., 0°) to circularly polarized light (e.g., right-handed) when passing through the quarter-wave plate 20. The circularly polarized light is reflected by the reflective structure 33 and changes into circularly polarized light (left-handed) with the opposite rotation direction. When the circularly polarized light (left-handed) passes through the quarter-wave plate 20 again, it changes from circularly polarized light (left-handed) to linearly polarized light (90°). At this time, the linearly polarized light (90°) is parallel to the dye molecules 132 and is absorbed by the dye molecules 132, thereby making the non-marking pattern area 120 dark.

[0097] Fig.18 Schematic diagram of the structure of the self-luminous display device in the reflective display mode in the third embodiment of the present invention. Fig.18 As shown, in the reflective display mode, the self-luminous display panel 30 is controlled to be turned off, and a common signal Vcom is applied to the auxiliary electrode 111, and a corresponding grayscale voltage is applied to each of the electrode blocks 121c, so that a corresponding vertical electric field E3 (such as Fig.18 As shown by the arrow in the middle, since the positive liquid crystal molecules rotate in a direction perpendicular to the electric field line under the action of the electric field, the positive liquid crystal molecules will deflect under the action of the vertical electric field E3, and the dye molecules 132 will deflect along with the liquid crystal molecules 131, thereby controlling the reflection brightness of the corresponding second pixel unit P2 to the ambient light, that is, each second pixel unit P2 presents a corresponding brightness. Since the ambient light is used to realize black and white display in the reflective display mode, the number of grayscale voltage levels on the electrode block 121c can be set to be relatively small, reducing the driving difficulty.

[0098] In the reflective display mode, the second pixel unit P2 in the bright state can refer to Fig.11 As shown, since the positive liquid crystal molecules and the dye molecules 132 in the dye liquid crystal layer 13 are in a vertical posture, the dye molecules 132 have basically no polarization effect on the light, and the ambient light I will not be polarized when passing through the dye liquid crystal layer 13, and can pass through the quarter wave plate 20 normally, and then be reflected back by the reflective structure 33 and pass through the quarter wave plate 20 and the dye liquid crystal layer 13 normally, thereby achieving a mirror reflection effect, so that the corresponding second pixel unit P2 is in a bright state. For the second pixel unit P2 in a dark state, reference can be made to Figure 6 As shown, when the ambient light I of the second pixel unit P2 in the dark state passes through the dye liquid crystal layer 13, the light parallel to the dye molecule 132 will be absorbed, while the light perpendicular to the dye molecule 132 can pass through the dye liquid crystal layer 13, and then change from linearly polarized light (e.g., 0°) to circularly polarized light (e.g., right-handed) when passing through the quarter-wave plate 20. The circularly polarized light is reflected by the reflective structure 33 and changes into circularly polarized light (left-handed) with the opposite rotation direction. When the circularly polarized light (left-handed) passes through the quarter-wave plate 20 again, it changes from circularly polarized light (left-handed) to linearly polarized light (90°). At this time, the linearly polarized light (90°) is parallel to the dye molecule 132 and is absorbed by the dye molecule 132, thereby making the corresponding second pixel unit P2 in the dark state.

[0099] It should be understood by those skilled in the art that the rest of the structure and working principle of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be described in detail here.

[0100] [Example 4]

[0101] Fig.19 Schematic diagram of the structure of the self-luminous display device in the fourth embodiment of the present invention in the initial state. Fig.19 As shown, the self-luminous display device and driving method provided in the fourth embodiment of the present invention are similar to those in the first embodiment ( Figures 1 to 11 )、Example 2 ( Figures 12 to 15 )、Example 3 ( Figures 16 to 18 ) are basically the same, except that:

[0102] In this embodiment, the liquid crystal molecules 131 are negative liquid crystal molecules (liquid crystal molecules with negative dielectric anisotropy). Fig.19As shown, in the initial state, the orientation direction of the dye liquid crystal layer 13 is perpendicular to the first substrate 11 and the second substrate 12, so that the self-luminous display device has a mirror reflection effect in the initial state. Of course, the pre-tilt angle of the dye liquid crystal layer 13 in the initial orientation can be between 83° and 90°, that is, the liquid crystal molecules 131 and the dye molecules 132 are initially approximately perpendicular to the first substrate 11 and the second substrate 12 for orientation, so as to set an initial deflection direction for the negative liquid crystal molecules and the dye molecules 132, so that in the wide viewing angle mode, the logo display mode and the reflection display mode, the angle between the negative liquid crystal molecules and the dye molecules 132 and the fast and slow axes of the quarter wave plate 20 is between 0° and 90°.

[0103] It should be understood by those skilled in the art that the rest of the structure and working principle of this embodiment are the same as those of Embodiment 1, Embodiment 2, and Embodiment 3, and will not be described in detail here.

[0104] Fig. 20 It is one of the planar structural schematic diagrams of the self-luminous display device in the present invention. Fig.21 This is the second schematic diagram of the planar structure of the self-luminous display device in the present invention. Fig. 20 and Fig.21 The self-luminous display device is provided with a viewing angle switching button 40 for the user to send a viewing angle switching request to the self-luminous display device. The viewing angle switching button 40 may be a physical button (such as Fig. 20 As shown), it can also be a software control or application (APP) to implement the switching function (such as Fig.21 As shown, the wide and narrow viewing angles are set by a sliding bar). When the user needs to switch between wide viewing angle, narrow viewing angle and mirror reflection, the user can send a viewing angle switching request to the self-luminous display device by operating the viewing angle switching button 40, and finally the driving chip 50 controls the voltage applied to the auxiliary electrode 111 and the control electrode 121. When the voltage difference between the auxiliary electrode 111 and the control electrode 121 is different, the self-luminous display device can realize the switching between wide viewing angle, narrow viewing angle and mirror reflection. When switching to a wide viewing angle, its driving method adopts the driving method corresponding to the wide-angle mode, and when switching to a narrow viewing angle, its driving method adopts the driving method corresponding to the narrow viewing angle mode. Therefore, the self-luminous display device of the embodiment of the present invention has strong operational flexibility and convenience, and achieves a multifunctional self-luminous display device integrating entertainment video and privacy.

[0105] In this document, the directional words such as up, down, left, right, front, and back are defined by the positions of the structures in the drawings and the positions of the structures relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second" used in this document are only used to distinguish names and are not used to limit quantity and order.

[0106] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A self-luminous display device, characterized in that: It comprises a dimming box (10), a quarter-wave plate (20) and a self-luminous display panel (30) which are stacked in sequence; The dimming box (10) comprises a first substrate (11), a second substrate (12) arranged opposite to the first substrate (11), and a dye liquid crystal layer (13) located between the first substrate (11) and the second substrate (12); the dye liquid crystal layer (13) comprises liquid crystal molecules (131) and dye molecules (132) mixed with each other, the dye molecules (132) rotate synchronously with the liquid crystal molecules (131); an auxiliary electrode (111) is provided on the first substrate (11), and a control electrode (121) matched with the auxiliary electrode (111) is provided on the second substrate (12); The self-luminous display panel (30) is used to control grayscale image display, and the self-luminous display panel (30) is provided with a reflective structure (33) for reflecting ambient light; In a wide viewing angle mode, the self-luminous display panel (30) is in an open state, the liquid crystal molecules (131) and the dye molecules (132) in the dye liquid crystal layer (13) are in a flat position, and the angle between the fast and slow axes of the quarter-wave plate (20) is between 0 and 90 degrees; in a narrow viewing angle mode, the self-luminous display panel (30) is in an open state, the liquid crystal molecules (131) and the dye molecules (132) in the dye liquid crystal layer (13) are in a tilted position; in a mirror reflection mode, the self-luminous display panel (30) is in a closed state, and the liquid crystal molecules (131) and the dye molecules (132) in the dye liquid crystal layer (13) are both in a tilted position or a vertical position.

2. The self-luminous display device according to claim 1, characterized in that: The reflective structure (33) is a grid-like structure and is located between the first pixel units (P1) and in the non-display area of ​​the self-luminous display panel (30).

3. The self-luminous display device according to claim 2, characterized in that: The reflective structure (33) comprises a first scan line (331) and a first data line (332) on the self-luminous display panel (30).

4. The self-luminous display device according to claim 1, characterized in that: The liquid crystal molecules (131) are positive liquid crystal molecules, the alignment direction of the dye liquid crystal layer (13) is parallel to the first substrate (11) and the second substrate (12), and the angle between the fast and slow axes of the quarter wave plate (20) is between 0° and 90°; Alternatively, the liquid crystal molecules (131) are negative liquid crystal molecules, and the alignment direction of the dye liquid crystal layer (13) is perpendicular to the first substrate (11) and the second substrate (12).

5. The self-luminous display device according to claim 1, characterized in that: In the wide viewing angle mode, the angle between the liquid crystal molecules (131) and the dye molecules (132) in the dye liquid crystal layer (13) and the quarter wave plate (20) is 45°.

6. The self-luminous display device according to any one of claims 1 to 5, characterized in that: The self-luminous display device comprises a logo pattern area (110) and a non-logo pattern area (120); the control electrode (121) comprises a first control electrode (121a) corresponding to the logo pattern area (110) and a second control electrode (121b) corresponding to the non-logo pattern area (120); the first control electrode (121a) and the second control electrode (121b) are insulated from each other and spaced apart; In the logo display mode, the self-luminous display panel (30) is in a closed state, the liquid crystal molecules (131) and the dye molecules (132) corresponding to the logo pattern area (110) are both in an inclined posture or a vertical posture, and the liquid crystal molecules (131) and the dye molecules (132) corresponding to the non-logo pattern area (120) are both in a flat posture, and the angle between them and the fast and slow axes of the quarter wave plate (20) is between 0 and 90 degrees.

7. The self-luminous display device according to any one of claims 1 to 5, characterized in that: A plurality of second scanning lines (101) and a plurality of second data lines (102) are provided on the second substrate (12); the second scanning lines (101) and the second data lines (102) are insulated from each other and cross-defined to form a plurality of second pixel units (P2); the control electrode (121) comprises a plurality of electrode blocks (121c) corresponding to the second pixel units (P2); the second substrate (12) is provided with a second thin film transistor (103) in each of the second pixel units (P2); the electrode block (121c) is electrically connected to the second scanning line (101) and the second data line (102) adjacent to the second thin film transistor (103) through the second thin film transistor (103); In the reflective display mode, corresponding grayscale voltages are applied to each of the electrode blocks (121c).

8. A method for driving a self-luminous display device, characterized in that: Used to drive the self-luminous display device according to any one of claims 1 to 7, the driving method comprising: In a wide viewing angle mode, the self-luminous display panel (30) is controlled to be turned on, a common signal (Vcom) is applied to the auxiliary electrode (111), and a wide viewing angle signal is applied to the control electrode (121), so as to control the liquid crystal molecules (131) and the dye molecules (132) in the dye liquid crystal layer (13) to be in a flat posture, and the angle between the fast and slow axes of the quarter wave plate (20) is between 0 and 90 degrees; In a narrow viewing angle mode, the self-luminous display panel (30) is controlled to be turned on, a common signal (Vcom) is applied to the auxiliary electrode (111), and a narrow viewing angle signal is applied to the control electrode (121), so as to control the liquid crystal molecules (131) and the dye molecules (132) in the dye liquid crystal layer (13) to be in a tilted posture; In the mirror reflection mode, the self-luminous display panel (30) is controlled to be turned off, a common signal (Vcom) is applied to the auxiliary electrode (111), and a reflection signal is applied to the control electrode (121), so as to control the liquid crystal molecules (131) and the dye molecules (132) in the dye liquid crystal layer (13) to be in a tilted posture or a vertical posture.

9. The driving method of the self-luminous display device according to claim 8, characterized in that: The self-luminous display device comprises a logo pattern area (110) and a non-logo pattern area (120); the control electrode (121) comprises a first control electrode (121a) corresponding to the logo pattern area (110) and a second control electrode (121b) corresponding to the non-logo pattern area (120); the first control electrode (121a) and the second control electrode (121b) are insulated from each other and spaced apart; and the driving method comprises: In the identification display mode, the self-luminous display panel (30) is controlled to be turned off, and a common signal (Vcom) is applied to the auxiliary electrode (111), and a bright state signal is applied to the first control electrode (121a) to control the liquid crystal molecules (131) and the dye molecules (132) corresponding to the identification pattern area (110) to be in an inclined posture or a vertical posture; and a dark state signal is applied to the second control electrode (121b) to control the liquid crystal molecules (131) and the dye molecules (132) corresponding to the non-identification pattern area (120) to be in a flat posture, and the angle between them and the fast and slow axes of the quarter wave plate (20) is between 0 and 90 degrees.

10. The driving method of the self-luminous display device according to claim 8, characterized in that: A plurality of second scanning lines (101) and a plurality of second data lines (102) are provided on the second substrate (12); the second scanning lines (101) and the second data lines (102) are insulated from each other and cross-defined to form a plurality of second pixel units (P2); the control electrode (121) comprises a plurality of electrode blocks (121c) corresponding to the second pixel units (P2); the second substrate (12) is provided with a second thin film transistor (103) in each of the second pixel units (P2); the electrode block (121c) is electrically connected to the second scanning line (101) and the second data line (102) adjacent to the second thin film transistor (103) through the second thin film transistor (103); and the driving method comprises: In the reflective display mode, the self-luminous display panel (30) is controlled to be turned off, a common signal (Vcom) is applied to the auxiliary electrode (111), and corresponding grayscale voltages are applied to each of the electrode blocks (121c) to control each of the second pixel units (P2) to present a corresponding brightness.

Images