Display device and driving method

Abstract

The invention discloses a display device and a driving method, the display device comprises a display panel and an electrochromic device stacked on the light emitting side of the display panel, and the display panel is provided with a reflection structure used for reflecting ambient light; the electrochromic device is provided with a graphical identification pattern area and a non-identification pattern area and comprises a first electrode layer, a second electrode layer and an electrochromic layer located between the first electrode layer and the second electrode layer. The first electrode layer and the second electrode layer are matched with each other and are jointly used for controlling the electrochromic layer to be switched between a transparent state and a non-transparent state, the first electrode layers corresponding to the identification pattern area and the non-identification pattern area are insulated and separated from each other, and / or the second electrode layers corresponding to the identification pattern area and the non-identification pattern area are insulated and separated from each other. The electrochromic device and the reflection structure used for reflecting the ambient light are arranged in the display device, so that the identification pattern is displayed by using the ambient light, and the power consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device and a driving method. Background Art

[0002] Liquid Crystal Display (LCD) has many advantages such as thin body, power saving, no radiation, etc., and has been widely used, such as LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or notebook computer screen, etc., and it occupies a dominant position in the field of flat panel display.

[0003] In order to improve the competitiveness of products, the display panel of the prior art can also use the difference in viewing angle to highlight the product's LOGO (trademark) pattern when displaying images at a narrow viewing angle. However, in the prior art, the LOGO pattern can only be seen at a wide viewing angle when displayed at a narrow viewing angle, and the backlight source and display box need to be turned on to see the LOGO pattern, which cannot achieve true screen-off display and has high power consumption. Summary of the invention

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a display device and a driving method, so that when the display device enters a sleep mode, it can use the reflected ambient light to display a LOGO pattern, thereby saving power consumption while achieving functional diversification and improving product competitiveness.

[0005] The purpose of the present invention is achieved through the following technical solutions: The present invention provides a display device, comprising a display panel and an electrochromic device stacked on a light-emitting side of the display panel, wherein the display panel has a reflective structure for reflecting ambient light; The electrochromic device has a graphic identification pattern area and a non-identification pattern area, the electrochromic device includes a first electrode layer, a second electrode layer and an electrochromic layer located between the first electrode layer and the second electrode layer, the first electrode layer and the second electrode layer cooperate with each other and are used together to control the electrochromic layer to switch between a transparent state and a non-transparent state, the first electrode layers corresponding to the identification pattern area and the non-identification pattern area are insulated and spaced apart from each other, and / or the second electrode layers corresponding to the identification pattern area and the non-identification pattern area are insulated and spaced apart from each other; In the logo pattern display mode, the entire display panel is used to reflect ambient light, the electrochromic layer corresponding to the logo pattern area is in a transparent state, and the electrochromic layer corresponding to the non-logo pattern area is in a non-transparent state.

[0006] Further, the first electrode layer includes a first identification pattern electrode corresponding to the identification pattern area and a first non-identification pattern electrode corresponding to the non-identification pattern area, and the first identification pattern electrode and the first non-identification pattern electrode are insulated and spaced apart from each other; or, the first electrode layer is a planar electrode arranged on the entire surface; The second electrode layer includes a second identification pattern electrode corresponding to the identification pattern area and a second non-identification pattern electrode corresponding to the non-identification pattern area, and the second identification pattern electrode and the second non-identification pattern electrode are insulated and spaced apart from each other; or, the second electrode layer is a planar electrode arranged on the entire surface; The electrochromic layer includes an identification pattern electrochromic layer corresponding to the identification pattern area and a non-identification pattern electrochromic layer corresponding to the non-identification pattern area, and the identification pattern electrochromic layer and the non-identification pattern electrochromic layer are spaced apart from each other; or, the electrochromic layer is a planar structure arranged on the entire surface.

[0007] Furthermore, the display panel has a plurality of first pixel units distributed in an array, the electrochromic device has a plurality of second pixel units distributed in an array, the first pixel units correspond to the second pixel units one by one, and the identification pattern area and the non-identification pattern area both correspond to a plurality of the second pixel units; The first electrode layer includes a plurality of first electrode blocks distributed in an array, the first electrode blocks correspond to the second pixel units one by one, and any two of the first electrode blocks are insulated and spaced apart from each other.

[0008] Further, the display panel includes a plurality of first scan lines, a plurality of first data lines, and a plurality of first thin film transistors, the plurality of first scan lines and the plurality of first data lines are insulated from each other and cross to define a plurality of first pixel units, each of the first pixel units is provided with a pixel electrode and the first thin film transistor, the pixel electrode is electrically connected to the first scan line and the first data line adjacent to the first thin film transistor through the first thin film transistor; The electrochromic device includes a plurality of second scanning lines, a plurality of second data lines and a plurality of second thin film transistors. The plurality of second scanning lines and the plurality of second data lines are insulated from each other and cross-defined to form a plurality of second pixel units. Each of the second pixel units is provided with the first electrode block and the second thin film transistor. The first electrode block is electrically connected to the second scanning line and the second data line adjacent to the second thin film transistor through the second thin film transistor.

[0009] Furthermore, the electrochromic device includes a third electrode layer that cooperates with the second electrode layer. The third electrode layer and the first electrode layer are located on the same side of the electrochromic layer and are insulated and separated from each other. The third electrode layer has a grid structure and its projection on the electrochromic device separates multiple second pixel units from each other. The electrochromic layer is provided between the second electrode layer and the third electrode layer.

[0010] Furthermore, the electrochromic device has a graphic clock pattern area, and the clock pattern area corresponds to a plurality of the second pixel units.

[0011] Further, the display panel is a transmissive display panel, the display device includes a backlight module, the backlight module is arranged on the light incident side of the display panel, the display panel includes a dimming box and a display liquid crystal box which are stacked on each other, the dimming box is arranged between the display liquid crystal box and the electrochromic device, the reflective structure is a semi-transmissive and semi-reflective film, the semi-transmissive and semi-reflective film is arranged between the dimming box and the display liquid crystal box, the dimming box is used to control the switching of wide and narrow viewing angles, and the display liquid crystal box is used to control the grayscale display of the picture; Alternatively, the display panel is a reflective display panel, and the reflective display panel can display images using reflected ambient light.

[0012] The present application also provides a method for driving a display device, the method for driving the display device as described above, the method comprising: In the picture display mode, the entire electrochromic device is controlled to be in a transparent state, and the display panel controls the picture display; In the logo pattern display mode, the entire display panel is controlled to reflect ambient light, and the electrochromic device is controlled to be transparent in the logo pattern area and non-transparent in the non-logo pattern area.

[0013] Further, the display panel has a plurality of first pixel units distributed in an array, the electrochromic device has a plurality of second pixel units distributed in an array, the first pixel units correspond to the second pixel units one by one, the identification pattern area and the non-identification pattern area both correspond to a plurality of the second pixel units, the electrochromic device includes a third electrode layer matched with the second electrode layer, the third electrode layer and the first electrode layer are located on the same side of the electrochromic layer and are insulated and spaced apart from each other, the projection of the third electrode layer on the electrochromic device spaces the plurality of the second pixel units apart from each other, the electrochromic layer is provided between the second electrode layer and the third electrode layer, and the driving method includes: In the picture display mode and the logo pattern display mode, the electrochromic layer between the second electrode layer and the third electrode layer is controlled to be in a non-transparent state.

[0014] Further, the display panel has a plurality of first pixel units distributed in an array, the electrochromic device has a plurality of second pixel units distributed in an array, the first pixel units correspond to the second pixel units one by one, the identification pattern area and the non-identification pattern area both correspond to a plurality of the second pixel units, the electrochromic device has a graphic clock pattern area, the clock pattern area corresponds to a plurality of the second pixel units, and the driving method includes: In the clock display mode, the entire display panel is controlled to reflect ambient light, and the electrochromic device is controlled to be transparent in the bright stroke area of ​​the clock pattern area and the logo pattern area, and to be non-transparent in the dark stroke area of ​​the clock pattern area and the non-logo pattern area; Or, in the clock display mode, the entire display panel is controlled to reflect ambient light, and the electrochromic device is controlled to be transparent in the bright stroke area of ​​the clock pattern area and non-transparent in the dark stroke area of ​​the clock pattern area, the logo pattern area and the non-logo pattern area.

[0015] The beneficial effect of the present invention is that by arranging an electrochromic device and a reflective structure for reflecting ambient light in a display device, in a logo pattern display mode, the ambient light reflected by the reflective structure in the display panel is utilized, and the electrochromic layer corresponding to the logo pattern area is controlled to be transparent, and the electrochromic layer corresponding to the non-logo pattern area is controlled to be non-transparent, thereby realizing the use of ambient light to display the logo pattern, thereby saving power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the display device in the initial state in the first embodiment of the present invention.

[0017] Figure 2 It is a schematic structural diagram of the electrochromic device in the transparent state in the first embodiment of the present invention.

[0018] Figure 3 It is a schematic diagram of the structure of the electrochromic device in the first embodiment of the present invention when it is in a non-transparent state.

[0019] Figure 4 It is a schematic diagram of the planar structure of the electrochromic device in the first embodiment of the present invention.

[0020] Figure 5 It is a schematic diagram of the planar structure of the first electrode layer in the first embodiment of the present invention.

[0021] Figure 6 It is a schematic diagram of the planar structure of the second electrode layer in the first embodiment of the present invention.

[0022] Figure 7 It is a schematic diagram of the planar structure of the electrochromic layer in the first embodiment of the present invention.

[0023] Figure 8 It is a schematic diagram of the planar structure of the first array substrate in the first embodiment of the present invention.

[0024] Fig. 9 It is a schematic diagram of the structure of the display device in the first embodiment of the present invention in the wide viewing angle mode.

[0025] Fig.10 It is a schematic diagram of the structure of the display device in the narrow viewing angle mode in the first embodiment of the present invention.

[0026] Fig.11 It is a schematic diagram of the structure of the display device in the identification pattern display mode in the first embodiment of the present invention.

[0027] Fig.12 It is a schematic diagram of the planar structure of the electrochromic layer in the identification pattern display mode in the first embodiment of the present invention.

[0028] Fig.13 It is a schematic diagram of the structure of the display device in the initial state in the second embodiment of the present invention.

[0029] Fig.14 It is a schematic diagram of the structure of the display device in the initial state in the third embodiment of the present invention.

[0030] Fig.15 It is a schematic diagram of the planar structure of the second array substrate in the third embodiment of the present invention.

[0031] Fig.16 It is a schematic diagram of the planar structure of the electrochromic device in the third embodiment of the present invention.

[0032] Fig.17 It is a schematic diagram of the planar structure of the electrochromic device in the third embodiment of the present invention when in the identification pattern display mode.

[0033] Fig.18 It is a schematic diagram of the structure of the display device in the initial state in the fourth embodiment of the present invention.

[0034] Fig.19 It is a schematic diagram of the planar structure of the third electrode layer in the fourth embodiment of the present invention.

[0035] Fig. 20 It is a schematic diagram of the structure of the display device in the initial state in the fifth embodiment of the present invention. DETAILED DESCRIPTION

[0036] 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 display device and driving method proposed by the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments: [Example 1] Figure 1 It is a schematic diagram of the structure of the display device in the initial state in the first embodiment of the present invention. Figure 2 It is a schematic structural diagram of the electrochromic device in the transparent state in the first embodiment of the present invention. Figure 3 It is a schematic diagram of the structure of the electrochromic device in the first embodiment of the present invention when it is in a non-transparent state. Figure 4 It is a schematic diagram of the planar structure of the electrochromic device in the first embodiment of the present invention. Figure 5 It is a schematic diagram of the planar structure of the first electrode layer in the first embodiment of the present invention. Figure 6 It is a schematic diagram of the planar structure of the second electrode layer in the first embodiment of the present invention. Figure 7 It is a schematic diagram of the planar structure of the electrochromic layer in the first embodiment of the present invention. Figure 8 It is a schematic diagram of the planar structure of the first array substrate in the first embodiment of the present invention.

[0037] like Figures 1 to 8 As shown, a display device provided by the first embodiment of the present invention includes a display panel and an electrochromic device 60 stacked on the light-emitting side of the display panel, and the display panel has a reflective structure for reflecting ambient light. The electrochromic device 60 is used to display the logo pattern using the ambient light reflected by the display panel when in the logo pattern display mode; the display panel is used to control the normal display of the picture when in the picture display mode.

[0038] like Figure 4 As shown, the electrochromic device 60 has and non-identification pattern area 620, the electrochromic device 60 includes a first electrode layer 61, a second electrode layer 62 and an electrochromic layer 63 located between the first electrode layer 61 and the second electrode layer 62, the first electrode layer 61 and the second electrode layer 62 cooperate with each other and are jointly used to control the switching of the electrochromic layer 63 between a transparent state and a non-transparent state, the first electrode layers 61 corresponding to the identification pattern area 610 and the non-identification pattern area 620 are insulated and spaced apart from each other and / or the second electrode layers 62 corresponding to the identification pattern area 610 and the non-identification pattern area 620 are insulated and spaced apart from each other.

[0039] like Figure 2 and Figure 3As shown, the electrochromic layer 63 includes a charge storage layer 631, an electrolyte layer 632 and an electrochromic material layer 633 which are stacked in sequence. When no voltage (0V) is applied to the first electrode layer 61 and the second electrode layer 62, the ions in the electrolyte layer 632 are stored at the interface of the charge storage layer 631 and do not migrate. At this time, the electrochromic material layer 633 is in a transparent state, that is, the electrochromic layer 63 is in a transparent state; when a voltage is applied to the first electrode layer 61 and the second electrode layer 62 and a voltage difference (1~5V) is formed, the electric field direction between the first electrode layer 61 and the second electrode layer 62 is toward the electrochromic material layer 633, and the ions in the electrolyte layer 632 will migrate to the surface of the electrochromic material layer 633 and react, and the color of the electrochromic material layer 633 will change to an opaque dark black-blue color. At this time, the electrochromic material layer 633 is in a non-transparent state, that is, the electrochromic layer 63 is in a non-transparent state. Thus, the display of the logo pattern is realized by utilizing the transmittance difference of the electrochromic layer 63 in the corresponding area of ​​the logo pattern area 610 and the non-logo pattern area 620. Among them, the charge storage layer 631 is, for example, NiOx, NiWOx, NiWTaOx, etc.; the electrolyte layer 632 includes electrolytes such as H+, Li+, Al3+, Na+, K+, Rb+ or Cs+, such as LiNbO2, LiClO4, LiBF4, LiAsF6 or LiPF6; the electrochromic layer (WO3, can also be WMoOx, WTiOx, WNiOx, etc.). The reaction formula is as follows: 3 (transparent) + xLi + =Li x 3 (deep dark blue) In this embodiment, Figure 5 As shown, the first electrode layer 61 includes a first identification pattern electrode 611 corresponding to the identification pattern area 610 and a first non-identification pattern electrode 612 corresponding to the non-identification pattern area 620. The first identification pattern electrode 611 and the first non-identification pattern electrode 612 are insulated and spaced apart from each other, that is, different electrical signals can be applied to the first identification pattern electrode 611 and the first non-identification pattern electrode 612 respectively. Figure 6 As shown, the second electrode layer 62 includes a second identification pattern electrode 621 corresponding to the identification pattern area 610 and a second non-identification pattern electrode 622 corresponding to the non-identification pattern area 620. The second identification pattern electrode 621 and the second non-identification pattern electrode 622 are insulated and spaced apart from each other, that is, different electrical signals can be applied to the second identification pattern electrode 621 and the second non-identification pattern electrode 622, respectively. Figure 7As shown, the electrochromic layer 63 includes an identification pattern electrochromic layer 63a corresponding to the identification pattern area 610 and a non-identification pattern electrochromic layer 63b corresponding to the non-identification pattern area 620. The identification pattern electrochromic layer 63a and the non-identification pattern electrochromic layer 63b are spaced apart from each other, so that no mutual interference occurs at the edge between the identification pattern electrochromic layer 63a and the non-identification pattern electrochromic layer 63b. Among them, the projections of the first identification pattern electrode 611, the second identification pattern electrode 621 and the identification pattern electrochromic layer 63a on the electrochromic device 60 overlap with each other, and the projections of the first non-identification pattern electrode 612, the second non-identification pattern electrode 622 and the non-identification pattern electrochromic layer 63b on the electrochromic device 60 overlap with each other. Of course, in other embodiments, the first electrode layer 61 may also be a planar electrode disposed on the entire surface, or the second electrode layer 62 may also be a planar electrode disposed on the entire surface, or the electrochromic layer 63 may also be a planar structure disposed on the entire surface, but the first electrode layer 61 and the second electrode layer 62 cannot both be planar electrodes disposed on the entire surface. The first electrode layer 61, the second electrode layer 62, and the electrochromic layer 63 adopt a planar structure disposed on the entire surface to reduce the number of mask processes and simplify the manufacturing process.

[0040] In this embodiment, the display panel is a transmissive display panel. The display device includes a backlight module 40, which is disposed on the light incident side of the display panel and is used to provide a backlight source for the display panel.

[0041] Among them, the backlight module 40 includes a backlight source 41 and an anti-peep layer 42, and the anti-peep layer 42 is used to narrow the range of the light emission angle. A brightness enhancement film 43 is also provided between the backlight source 41 and the anti-peep layer 42, and the brightness enhancement film 43 increases the brightness of the backlight module 40. Among them, the anti-peep layer 42 is equivalent to a miniature shutter structure, which can block light with a larger incident angle and allow light with a smaller incident angle to pass through, so that the angle range of light passing through the anti-peep layer 42 becomes smaller. The anti-peep layer 42 includes a plurality of parallel light-blocking walls and a light-transmitting hole located between two adjacent light-blocking walls, and light-absorbing materials are provided on both sides of the light-blocking walls. Of course, the backlight source 41 can also be a light-collecting backlight source, so there is no need to set the anti-peep layer 42, but the light-collecting backlight source is more expensive than the conventional backlight source. The backlight module 40 can be a side-entry backlight module or a direct-down backlight module. Preferably, the backlight module 40 adopts a collimated backlight (CBL) mode, which can collect light and ensure the display effect.

[0042] The display panel includes a dimming box 10 and a display liquid crystal box 30 which are stacked on each other. The dimming box 10 is arranged between the display liquid crystal box 30 and the electrochromic device 60. The reflective structure is a semi-transparent and semi-reflective film 20. The semi-transparent and semi-reflective film 20 is arranged between the dimming box 10 and the display liquid crystal box 30. The dimming box 10 is used to control the switching of wide and narrow viewing angles. The display liquid crystal box 30 is used to control the grayscale display of the picture. The semi-transparent and semi-reflective film 20 has a transmission effect and a reflection effect on light. The reflection and transmission ratio of the semi-transparent and semi-reflective film 20 can be set according to actual conditions. The semi-transparent and semi-reflective film 20 is, for example, an APF polarizer.

[0043] The dimming box 10 includes a first substrate 11, a second substrate 12 arranged opposite to the first substrate 11, and a first liquid crystal layer 13 located between the first substrate 11 and the second substrate 12. A viewing angle auxiliary electrode 111 is provided on the first substrate 11, and a viewing angle control electrode 121 is provided on the second substrate 12. The viewing angle control electrode 121 cooperates with the viewing angle auxiliary electrode 111. By controlling the voltages on the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, the dimming box 10 is controlled to switch between a wide viewing angle and a narrow viewing angle. When the dimming box 10 is at a wide viewing angle, the semi-transparent and semi-reflective film 20 mainly transmits the backlight, and the displayed picture is visible at a full viewing angle; when the dimming box 10 is at a narrow viewing angle, the semi-transparent and semi-reflective film 20 can reflect external ambient light to enhance the narrow viewing angle effect. Among them, the viewing angle auxiliary electrode 111 is a planar electrode that covers the first substrate 11 on the entire surface, and the viewing angle control electrode 121 is a planar electrode that covers the second substrate 12 on the entire surface, so that the dimming box 10 can achieve wide and narrow viewing angle switching on the entire surface at the same time.

[0044] In this embodiment, the first liquid crystal layer 13 uses positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. Figure 1 As shown, in the initial state, the positive liquid crystal molecules are aligned parallel to the first substrate 11 and the second substrate 12, and the alignment direction of the first 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 (positive parallel or reverse parallel), so that the dimming box 10 is in a wide viewing angle state in the initial state. The positive liquid crystal molecules in the first liquid crystal layer 13 and the first substrate 11 and the second substrate 12 can have a small initial pre-tilt angle, and the range of the initial pre-tilt angle can be less than or equal to 10 degrees, that is: 0°≦θ≦10°, so as to reduce the response time of the vertical deflection of the positive liquid crystal molecules, that is, to reduce the response time of switching between wide viewing angle and narrow viewing angle. Of course, in other embodiments, the first liquid crystal layer 13 can also use negative liquid crystal molecules, that is, liquid crystal molecules with negative dielectric anisotropy. The negative liquid crystal molecules are tilted to the first substrate 11 and the second substrate 12 for alignment, so that the dimming box 10 is in a narrow viewing angle state in the initial state.

[0045] The display liquid crystal box 30 includes a color filter substrate 31, a first array substrate 32 disposed opposite to the color filter substrate 31, and a second liquid crystal layer 33 located between the color filter substrate 31 and the first array substrate 32. In this embodiment, positive liquid crystal molecules are used in the second liquid crystal layer 33, that is, liquid crystal molecules with positive dielectric anisotropy, such as Figure 1 As shown, in the initial state, the positive liquid crystal molecules in the second liquid crystal layer 33 are aligned parallel to the color filter substrate 31 and the first array substrate 32, and the alignment direction of the positive liquid crystal molecules close to the color filter substrate 31 is reversely parallel to the alignment direction of the positive liquid crystal molecules close to the first array substrate 32.

[0046] Among them, a color filter substrate 31 is provided with a color resist layer 312 and a black matrix (BM) 311 separating the color resist layer 312 on the side facing the second liquid crystal layer 33. The color resist layer 312 includes, for example, three color resist materials of red (R), green (G), and blue (B), which respectively form red, green, and blue pixel units. The black matrix 311 is located between the red, green, and blue pixel units, so that adjacent pixel units are separated from each other by the black matrix 311.

[0047] like Figure 8 As shown, the display panel has a plurality of first pixel units P1 distributed in an array. The first array substrate 32 is formed by a plurality of first scan lines 1 and a plurality of first data lines 2 that are mutually insulated and cross-defined on the side facing the second liquid crystal layer 33 to form a plurality of first pixel units P1. A pixel electrode 322 and a first thin film transistor 3 are provided in each first pixel unit P1. The pixel electrode 322 is electrically connected to the first scan line 1 and the first data line 2 adjacent to the first thin film transistor 3 through the first thin film transistor 3. The black matrix 311 corresponds to the first scan line 1, the first data line 2 and the first thin film transistor 3 from top to bottom. The first thin film transistor 3 includes a first gate, a first active layer, a first drain and a first source. The first gate and the first scan line 1 are located in the same layer and are electrically connected. The first gate and the first active layer are separated by an insulating layer. The first source is electrically connected to the first data line 2. The first drain is electrically connected to the pixel electrode 322 through a contact hole.

[0048] In this embodiment, a common electrode 321 is further provided on the side of the first array substrate 32 facing the second liquid crystal layer 33. The common electrode 321 and the pixel electrode 322 are located in different layers and insulated and isolated by an insulating layer. The common electrode 321 can be located above or below the pixel electrode 322 ( Figure 1As shown in the figure, the common electrode 321 is located below the pixel electrode 322). Preferably, the common electrode 321 is a planar electrode arranged on the entire surface, and the pixel electrode 322 is a block electrode arranged in each pixel unit or a slit electrode having a plurality of electrode strips to form a fringe field switching mode (Fringe Field Switching, FFS). Of course, in other embodiments, the pixel electrode 322 and the common electrode 321 are located on the same layer, but the two are insulated and isolated from each other, and the pixel electrode 322 and the common electrode 321 can each include a plurality of electrode strips, and the electrode strips of the pixel electrode 322 and the electrode strips of the common electrode 321 are arranged alternately to form an in-plane switching mode (In-Plane Switching, IPS); or, in other embodiments, the first array substrate 32 is provided with a pixel electrode 322 on the side facing the second liquid crystal layer 33, and the color filter substrate 31 is provided with a common electrode 321 on the side facing the second liquid crystal layer 33 to form a TN mode or a VA mode. As for other introductions to the TN mode and the VA mode, please refer to the prior art, which will not be repeated here.

[0049] Furthermore, a first polarizer 51 is provided between the dimming box 10 and the display liquid crystal box 30, a second polarizer 52 is provided on the side of the display liquid crystal box 30 away from the dimming box 10, a third polarizer 53 is provided on the side of the dimming box 10 away from the display liquid crystal box 30, the light transmission axes of the first polarizer 51 and the second polarizer 52 are perpendicular to each other, and the light transmission axes of the third polarizer 53 and the first polarizer 51 are parallel to each other. In this embodiment, a first polarizer 51 is provided between the color film substrate 31 and the second substrate 12, a second polarizer 52 is provided on the side of the first array substrate 32 away from the second liquid crystal layer 33, and a third polarizer 53 is provided on the side of the first substrate 11 away from the first liquid crystal layer 13. Among them, the light transmission axis of the semi-transparent and semi-reflective film 20 is parallel to the light transmission axis of the third polarizer 53 and the light transmission axis of the first polarizer 51, and the light reflection axis of the semi-transparent and semi-reflective film 20 is perpendicular to the light transmission axis of the third polarizer 53 and the light transmission axis of the first polarizer 51. The third polarizer 53 can be disposed between the dimming box 10 and the electrochromic device 60, or can be disposed on a side of the electrochromic device 60 away from the dimming box 10, so as to protect the electrochromic device 60. Of course, in other embodiments, since the semi-transmissive and semi-reflective film 20 has a polarizing effect on light, the first polarizer 51 can be replaced by the semi-transmissive and semi-reflective film 20, so as to reduce the box thickness of the display device.

[0050] The first substrate 11, the second substrate 12, the color filter substrate 31 and the first array substrate 32 may be made of transparent substrates such as glass, acrylic and polycarbonate. The materials of the viewing angle auxiliary electrode 111, the viewing angle control electrode 121, the first electrode layer 61, the second electrode layer 62, the common electrode 321 and the pixel electrode 322 may be made of transparent electrodes such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0051] The present application also provides a method for driving a display device, the method for driving the display device as described above. The method comprises: In the picture display mode, the entire electrochromic device 60 is controlled to be in a transparent state, and the display panel controls the picture display; In the logo pattern display mode, the entire display panel is controlled to reflect ambient light, and the electrochromic device 60 is controlled to be transparent in the logo pattern area 610 and non-transparent in the non-logo pattern area 620 .

[0052] Fig. 9 It is a schematic diagram of the structure of the display device in the first embodiment of the present invention in the wide viewing angle mode. Fig.10 Schematic diagram of the structure of the display device in the narrow viewing angle mode in the first embodiment of the present invention. Fig. 9 and Fig.10 As shown, the picture display mode includes a wide viewing angle mode and a narrow viewing angle mode. In the wide viewing angle mode and the narrow viewing angle mode, no voltage (0V) is applied to all the first electrode layers 61 and all the second electrode layers 62, so that the entire electrochromic device 60 is controlled to be in a transparent state.

[0053] like Fig. 9 As shown, in the wide viewing angle mode, no electrical signal is applied to the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, and no vertical electric field is formed between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121. The positive liquid crystal molecules in the first liquid crystal layer 13 basically do not deflect in the vertical direction and maintain the initial flat posture. At this time, the display device realizes wide viewing angle display. In the wide viewing angle display, since the display device has a high brightness regardless of whether it is at a large viewing angle or a normal viewing angle, the influence of the ambient light reflected by the semi-transparent and semi-reflective film 20 on the wide viewing angle display can be basically ignored.

[0054] like Fig.10 As shown, in the narrow viewing angle mode, corresponding electrical signals are applied to the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, respectively, and the voltage difference between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121 is greater than a preset value (for example, greater than 5V), so that a strong vertical electric field is formed between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121 ( Fig.10In the embodiment E2), the positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected in the vertical direction and are in a tilted posture. At this time, the first liquid crystal layer 13 is in a light-collecting state at a large viewing angle (i.e., the brightness at a large viewing angle is reduced), the contrast at a large viewing angle is reduced, and the display device realizes a narrow viewing angle display. When displaying at a narrow viewing angle, since the brightness of the display device is low at a large viewing angle, the contrast reduction is also low. At this time, the ambient light reflected by the semi-transparent and semi-reflective film 20 can cause strong interference to the transmitted backlight at a large viewing angle. Therefore, the ambient light reflected by the semi-transparent and semi-reflective film 20 can enhance the narrow viewing angle effect.

[0055] like Fig. 9 and Fig.10 As shown, in the wide viewing angle mode and the narrow viewing angle mode, a common voltage is applied to the common electrode 321, and a corresponding grayscale voltage is applied to the pixel electrode 322, so that a voltage difference is formed between the pixel electrode 322 and the common electrode 321 and a horizontal electric field is generated ( Fig. 9 and Fig.10 In the embodiment of FIG. 1 , the positive liquid crystal molecules in the second liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of light passing through the second liquid crystal layer 23 to achieve grayscale display. The grayscale voltage includes 0 to 255 grayscale voltages. When different grayscale voltages are applied to the pixel electrode 322, the pixel unit presents different brightness, thereby displaying different pictures under wide viewing angles and narrow viewing angles, so as to achieve normal display of the display device under wide viewing angles and narrow viewing angles.

[0056] Fig.11 It is a schematic diagram of the structure of the display device in the identification pattern display mode in the first embodiment of the present invention. Fig.12 Schematic diagram of the planar structure of the electrochromic layer in the first embodiment of the present invention in the logo pattern display mode. Fig.11 and Fig.12As shown, in the logo pattern display mode, the display panel is turned off, that is, the dimming box 10 , the display liquid crystal box 30 and the backlight module 40 do not apply electrical signals, and the entire display panel reflects ambient light through the semi-transparent and semi-reflective film 20 . No voltage (0V) is applied to the first identification pattern electrode 611 and the second identification pattern electrode 621, so that the identification pattern electrochromic layer 63a is controlled to be transparent, that is, the electrochromic device 60 is controlled to be transparent in the identification pattern area 610, and the ambient light reflected by the semi-reflective film 20 can pass through the identification pattern area 610, and the identification pattern area 610 is bright; while a voltage is applied to the first non-identification pattern electrode 612 and the second non-identification pattern electrode 622 to form a voltage difference (1-5V), and the electric field direction between the first non-identification pattern electrode 612 and the second non-identification pattern electrode 622 is toward the electrochromic material layer 633, so that the non-identification pattern electrochromic layer 63b is controlled to be non-transparent, that is, the electrochromic device 60 is controlled to be non-transparent in the non-identification pattern area 620, and the ambient light reflected by the semi-reflective film 20 cannot pass through the non-identification pattern area 620, and the non-identification pattern area 620 is dark. The display of the identification pattern is achieved by the difference in brightness between the identification pattern area 610 and the non-identification pattern area 620.

[0057] [Example 2] Fig.13 Schematic diagram of the structure of the display device in the initial state in the second embodiment of the present invention. Fig.13 As shown, the display device and driving method provided by the second embodiment of the present invention are similar to those provided by the first embodiment ( Figures 1 to 12 ) are substantially the same, except that, in this embodiment: The first electrode layer 61 includes a first identification pattern electrode 611 corresponding to the identification pattern area 610 and a first non-identification pattern electrode 612 corresponding to the non-identification pattern area 620. The first identification pattern electrode 611 and the first non-identification pattern electrode 612 are insulated and spaced apart from each other, that is, different electrical signals can be applied to the first identification pattern electrode 611 and the first non-identification pattern electrode 612. The second electrode layer 62 is a planar electrode arranged on the entire surface, and the electrochromic layer 63 is a planar structure arranged on the entire surface. Therefore, when manufacturing the second electrode layer 62 and the electrochromic layer 63, it is only necessary to coat the entire surface without etching through a mask process, thereby reducing the number of mask processes and simplifying the manufacturing process.

[0058] 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.

[0059] [Example 3] Fig.14 It is a schematic diagram of the structure of the display device in the initial state in the third embodiment of the present invention. Fig.15FIG. 1 is a schematic diagram of the planar structure of the second array substrate in the third embodiment of the present invention. Fig.14 and Fig.15 As shown, the 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 12 )、Example 2 ( Fig.13 ) are substantially the same, except that, in this embodiment: The electrochromic device 60 has a plurality of first pixel units P1 distributed in an array, the first pixel units P1 correspond to the first pixel units P1 one by one, and the identification pattern area 610 and the non-identification pattern area 620 both correspond to the plurality of first pixel units P1. The first electrode layer 61 includes a plurality of first electrode blocks 613 distributed in an array, the first electrode blocks 613 correspond to the first pixel units P1 one by one, and any two first electrode blocks 613 are insulated and spaced apart from each other, that is, each first electrode block 61 can be independently controlled, so that the electrochromic layer 63 in the area corresponding to each first pixel unit P1 can independently switch between a transparent state and a non-transparent state, so that the pattern of the identification pattern area 610 can be arbitrarily adjusted according to actual needs.

[0060] The electrochromic device 60 includes a plurality of second scan lines 4, a plurality of second data lines 5, and a plurality of second thin film transistors 6. The plurality of second scan lines 4 and the plurality of second data lines 5 are mutually insulated and cross-defined to form a plurality of first pixel units P1. A first electrode block 613 and a second thin film transistor 6 are provided in each first pixel unit P1. The first electrode block 613 is electrically connected to the second scan line 4 and the second data line 5 adjacent to the second thin film transistor 6 through the second thin film transistor 6, that is, the electrochromic device 60 has a second array substrate, so that each first electrode block 613 can be independently controlled by the corresponding second scan line 4, the second data line 5, and the second thin film transistor 6. Among them, the second thin film transistor 6 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 4 and is electrically connected. The second gate is isolated from the second active layer by an insulating layer, the second source is electrically connected to the second data line 5, and the second drain is electrically connected to the first electrode block 613 through a contact hole.

[0061] Fig.16 Schematic diagram of the planar structure of the electrochromic device in the third embodiment of the present invention. Fig.16 As shown, in this embodiment, the electrochromic device 60 has a graphical clock pattern area 630, the clock pattern area 630 corresponds to a plurality of first pixel units P1, the clock pattern area 630 has a plurality of stroke areas, and the electrochromic layer 63 corresponding to each stroke area can independently switch between a transparent state and a non-transparent state, so that the numbers in the clock pattern area 630 can change over time.

[0062] The present application also provides a method for driving a display device, the method for driving the display device as described above. The method comprises: In the picture display mode, the entire electrochromic device 60 is controlled to be in a transparent state, and the display panel controls the picture display; In the logo pattern display mode, the entire display panel is controlled to reflect ambient light, and the electrochromic device 60 is controlled to be transparent in the logo pattern area 610 and non-transparent in the non-logo pattern area 620 .

[0063] refer to Fig. 9 and Fig.10 As shown, the picture display mode includes a wide viewing angle mode and a narrow viewing angle mode. In the wide viewing angle mode and the narrow viewing angle mode, no voltage (0V) is applied to all the first electrode layers 61 and all the second electrode layers 62, so that the entire electrochromic device 60 is controlled to be in a transparent state.

[0064] refer to Fig. 9 As shown, in the wide viewing angle mode, no electrical signal is applied to the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, and no vertical electric field is formed between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121. The positive liquid crystal molecules in the first liquid crystal layer 13 basically do not deflect in the vertical direction and maintain the initial flat posture. At this time, the display device realizes wide viewing angle display. In the wide viewing angle display, since the display device has a high brightness regardless of whether it is at a large viewing angle or a normal viewing angle, the influence of the ambient light reflected by the semi-transparent and semi-reflective film 20 on the wide viewing angle display can be basically ignored.

[0065] refer to Fig.10 As shown, in the narrow viewing angle mode, corresponding electrical signals are applied to the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, respectively, and the voltage difference between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121 is greater than a preset value (for example, greater than 5V), so that a strong vertical electric field is formed between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121 ( Fig.10 In the embodiment E2), the positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected in the vertical direction and are in a tilted posture. At this time, the first liquid crystal layer 13 is in a light-collecting state at a large viewing angle (i.e., the brightness at a large viewing angle is reduced), the contrast at a large viewing angle is reduced, and the display device realizes a narrow viewing angle display. When displaying at a narrow viewing angle, since the brightness of the display device is low at a large viewing angle, the contrast reduction is also low. At this time, the ambient light reflected by the semi-transparent and semi-reflective film 20 can cause strong interference to the transmitted backlight at a large viewing angle. Therefore, the ambient light reflected by the semi-transparent and semi-reflective film 20 can enhance the narrow viewing angle effect.

[0066] refer to Fig. 9 and Fig.10As shown, in the wide viewing angle mode and the narrow viewing angle mode, a common voltage is applied to the common electrode 321, and a corresponding grayscale voltage is applied to the pixel electrode 322, so that a voltage difference is formed between the pixel electrode 322 and the common electrode 321 and a horizontal electric field is generated ( Fig. 9 and Fig.10 In the embodiment of FIG. 1 , the positive liquid crystal molecules in the second liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of light passing through the second liquid crystal layer 23 to achieve grayscale display. The grayscale voltage includes 0 to 255 grayscale voltages. When different grayscale voltages are applied to the pixel electrode 322, the pixel unit presents different brightness, thereby displaying different pictures under wide viewing angles and narrow viewing angles, so as to achieve normal display of the display device under wide viewing angles and narrow viewing angles.

[0067] refer to Fig.11 and Fig.12 As shown, in the identification pattern display mode, the display panel is turned off, that is, the dimming box 10, the display liquid crystal box 30 and the backlight module 40 do not apply electrical signals, and the entire display panel reflects ambient light through the semi-transparent and semi-reflective film 20. A common voltage (for example, 0V) is applied to the second electrode layer 62, and no voltage (for example, 0V) is applied to the first electrode block 613 corresponding to the identification pattern area 610, so that the electrochromic layer 63 corresponding to the identification pattern area 610 is controlled to be transparent, that is, the electrochromic device 60 is controlled to be transparent in the identification pattern area 610, and the ambient light reflected by the semi-transparent and semi-reflective film 20 can pass through the identification pattern area 610, and the identification pattern area 610 is bright; while a common voltage (for example, 0V) is applied to the second electrode layer 62, and the first electrode block 613 corresponding to the non-identification pattern area 620 is not applied with a voltage (for example, 0V). A voltage (e.g., 1-5V) is applied to the electrode block 613 and a voltage difference is formed between the electrode block 613 and the second electrode layer 62. The direction of the electric field between the first electrode block 613 corresponding to the non-identification pattern area 620 and the second electrode layer 62 is toward the electrochromic material layer 633, thereby controlling the electrochromic layer 63 corresponding to the non-identification pattern area 620 to be non-transparent, that is, controlling the electrochromic device 60 to be non-transparent in the non-identification pattern area 620, and the ambient light reflected by the semi-reflective film 20 cannot pass through the non-identification pattern area 620, and the non-identification pattern area 620 is in a dark state. The display of the identification pattern is realized by the difference in brightness between the identification pattern area 610 and the non-identification pattern area 620. Among them, the second scanning line 4, the second data line 5 and the second thin film transistor 6 can be used to control any first electrode block 613 to apply voltage or not apply voltage, so that the pattern of the identification pattern area 610 can be adjusted arbitrarily.

[0068] Fig.17 Schematic diagram of the planar structure of the electrochromic device in the third embodiment of the present invention in the identification pattern display mode. Fig.17As shown, in the clock display mode, the entire display panel is controlled to reflect ambient light, that is, the dimming box 10, the display liquid crystal box 30 and the backlight module 40 do not apply electrical signals, and the entire display panel reflects ambient light through the semi-transparent and semi-reflective film 20. The electrochromic device 60 is controlled to be transparent in the bright stroke area and the logo pattern area 610 of the clock pattern area 630, and to be non-transparent in the dark stroke area and the non-logo pattern area 620 of the clock pattern area 630. Specifically, a common voltage (e.g., 0V) is applied to the second electrode layer 62, and no voltage (e.g., 0V) is applied to the first electrode block 613 corresponding to the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610, so that the electrochromic layer 63 corresponding to the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610 is controlled to be transparent, that is, the electrochromic device 60 is controlled to be transparent in the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610, and the ambient light reflected by the semi-reflective film 20 can pass through the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610, and the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610 are in a bright state; while a common voltage (e.g., 0V) is applied to the second electrode layer 62, the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area A voltage (e.g., 1-5V) is applied to the first electrode block 613 corresponding to the case area 620, and a voltage difference is formed between the first electrode block 613 and the second electrode layer 62 corresponding to the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area 620. The electric field direction between the first electrode block 613 and the second electrode layer 62 is toward the electrochromic material layer 633, so that the dark stroke area of ​​the clock pattern area 630 and the electrochromic layer 63 corresponding to the non-logo pattern area 620 are controlled to be non-transparent, that is, the electrochromic device 60 is controlled to be non-transparent in the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area 620, and the ambient light reflected by the semi-reflective film 20 cannot pass through the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area 620, and the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area 620 are in a dark state. The display of the logo pattern and the clock pattern is realized by the difference in brightness between the clock pattern area 63, the logo pattern area 610 and the non-logo pattern area 620.

[0069] Of course, in other embodiments, in the clock display mode, the entire display panel is controlled to reflect ambient light, that is, the dimming box 10, the display liquid crystal box 30 and the backlight module 40 are not applied with electrical signals, and the entire display panel reflects ambient light through the semi-transparent and semi-reflective film 20. The electrochromic device 60 is controlled to be transparent in the bright stroke area of ​​the clock pattern area 630 and to be non-transparent in the dark stroke area of ​​the clock pattern area 630, the logo pattern area 610 and the non-logo pattern area 620. Specifically, a common voltage (e.g., 0V) is applied to the second electrode layer 62, and no voltage (e.g., 0V) is applied to the first electrode block 613 corresponding to the bright stroke area of ​​the clock pattern area 630, so that the electrochromic layer 63 corresponding to the bright stroke area of ​​the control clock pattern area 630 is in a transparent state, that is, the electrochromic device 60 is controlled to be transparent in the bright stroke area of ​​the clock pattern area 630, and the ambient light reflected by the semi-reflective film 20 can pass through the bright stroke area of ​​the clock pattern area 630, and the bright stroke area of ​​the clock pattern area 630 is in a bright state; while a common voltage (e.g., 0V) is applied to the second electrode layer 62, and a voltage (e.g., 1~5V) is applied to the first electrode block 613 corresponding to the dark stroke area of ​​the clock pattern area 630, the identification pattern area 610, and the non-identification pattern area 620, and a voltage is formed between the second electrode layer 62. The electric field direction between the first electrode block 613 and the second electrode layer 62 corresponding to the dark stroke area, the logo pattern area 610 and the non-logo pattern area 620 of the clock pattern area 630 is oriented toward the electrochromic material layer 633, so as to control the electrochromic layer 63 corresponding to the dark stroke area, the logo pattern area 610 and the non-logo pattern area 620 of the clock pattern area 630 to be non-transparent, that is, the electrochromic device 60 is controlled to be non-transparent in the dark stroke area, the logo pattern area 610 and the non-logo pattern area 620 of the clock pattern area 630, and the ambient light reflected by the semi-reflective film 20 cannot pass through the dark stroke area, the logo pattern area 610 and the non-logo pattern area 620 of the clock pattern area 630, and the dark stroke area, the logo pattern area 610 and the non-logo pattern area 620 of the clock pattern area 630 are in a dark state. The display of the clock pattern is realized separately through the light and dark difference of the clock pattern area 63, the logo pattern area 610 and the non-logo pattern area 620.

[0070] 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.

[0071] [Example 4] Fig.18 It is a schematic diagram of the structure of the display device in the initial state in the fourth embodiment of the present invention. Fig.19 Schematic diagram of the planar structure of the third electrode layer in the fourth embodiment of the present invention. Fig.18 and Fig.19As shown, the display device and driving method provided by the fourth embodiment of the present invention are similar to those provided by the third embodiment ( Figures 14 to 17 ) are substantially the same, except that, in this embodiment: The electrochromic device 60 includes a third electrode layer 64 that cooperates with the second electrode layer 62. The third electrode layer 64 and the first electrode layer 61 are located on the same side of the electrochromic layer 63 and are insulated and spaced apart from each other. The third electrode layer 64 and the first electrode layer 61 are located on different layers and are spaced apart from each other by an insulating layer. The third electrode layer 64 is a grid-like structure and its projection on the electrochromic device 60 separates a plurality of first pixel units P1 from each other. The electrochromic layer 63 is provided between the second electrode layer 62 and the third electrode layer 64. The projection of the first electrode block 613 on the electrochromic device 60 covers the mesh on the third electrode layer 64, and the projection of the third electrode layer 64 on the electrochromic device 60 covers the gap between any two adjacent first electrode blocks 613. Since there is a gap between any two adjacent first electrode blocks 613, light leakage will occur between two adjacent first pixel units P1. The leaked light includes the ambient light reflected by the semi-transparent and semi-reflective film 20 and the ambient light reflected by the second scanning line 4, the second data line 5, and the second thin film transistor 6, which will affect the display effect of the logo pattern and the clock pattern. After the grid-shaped third electrode layer 64 is set, the electrochromic layer 63 between the third electrode layer 64 and the second electrode layer 62 can be controlled to be non-transparent through the third electrode layer 64 and the second electrode layer 62, thereby avoiding the phenomenon of light leakage between two adjacent first pixel units P1. Of course, the third electrode layer 64 can also cover the non-display area at the edge of the display device, thereby avoiding the phenomenon of light leakage in the non-display area at the edge of the display device.

[0072] In this embodiment, the projection of the third electrode layer 64 on the color filter substrate 31 overlaps with the black matrix 311. Since the third electrode layer 64 and the second electrode layer 62 can control the electrochromic layer 63 between the third electrode layer 64 and the second electrode layer 62 to be non-transparent, thereby achieving a shading effect, there is no need to set the black matrix 311 on the color filter substrate 31, thereby reducing the box thickness of the display device, simplifying the manufacturing process of the display device, and reducing the manufacturing cost.

[0073] The present application also provides a method for driving a display device, the method for driving the display device as described above. The method comprises: In the picture display mode, the logo pattern display mode and the clock display mode, the electrochromic layer 63 between the second electrode layer 62 and the third electrode layer 64 is controlled to be non-transparent, that is, the electrochromic layer 63 in the corresponding area of ​​the third electrode layer 64 is non-transparent, so as to avoid light leakage between two adjacent first pixel units P1.

[0074] refer to Fig. 9 and Fig.10 As shown, the picture display mode includes a wide viewing angle mode and a narrow viewing angle mode. In the wide viewing angle mode and the narrow viewing angle mode, no voltage (0V) is applied to all the first electrode layers 61 and all the second electrode layers 62, so that the electrochromic devices 60 corresponding to all the first pixel units P1 are controlled to be in a transparent state; and a voltage (for example, 1~5V) is applied to the third electrode layer 64 and a voltage difference is formed between the third electrode layer 64 and the second electrode layer 62, so that the electrochromic layer 63 corresponding to the third electrode layer 64 is controlled to be in a non-transparent state, and the ambient light reflected by the semi-reflective film 20 cannot pass through the area corresponding to the third electrode layer 64, and the area corresponding to the third electrode layer 64 is in a dark state, thereby achieving the effect of a black matrix.

[0075] refer to Fig. 9 As shown, in the wide viewing angle mode, no electrical signal is applied to the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, and no vertical electric field is formed between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121. The positive liquid crystal molecules in the first liquid crystal layer 13 basically do not deflect in the vertical direction and maintain the initial flat posture. At this time, the display device realizes wide viewing angle display. In the wide viewing angle display, since the display device has a high brightness regardless of whether it is at a large viewing angle or a normal viewing angle, the influence of the ambient light reflected by the semi-transparent and semi-reflective film 20 on the wide viewing angle display can be basically ignored.

[0076] refer to Fig.10 As shown, in the narrow viewing angle mode, corresponding electrical signals are applied to the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121, respectively, and the voltage difference between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121 is greater than a preset value (for example, greater than 5V), so that a strong vertical electric field is formed between the viewing angle auxiliary electrode 111 and the viewing angle control electrode 121 ( Fig.10 In the embodiment E2), the positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected in the vertical direction and are in a tilted posture. At this time, the first liquid crystal layer 13 is in a light-collecting state at a large viewing angle (i.e., the brightness at a large viewing angle is reduced), the contrast at a large viewing angle is reduced, and the display device realizes a narrow viewing angle display. When displaying at a narrow viewing angle, since the brightness of the display device is low at a large viewing angle, the contrast reduction is also low. At this time, the ambient light reflected by the semi-transparent and semi-reflective film 20 can cause strong interference to the transmitted backlight at a large viewing angle. Therefore, the ambient light reflected by the semi-transparent and semi-reflective film 20 can enhance the narrow viewing angle effect.

[0077] refer to Fig. 9 and Fig.10 As shown, in the wide viewing angle mode and the narrow viewing angle mode, a common voltage is applied to the common electrode 321, and a corresponding grayscale voltage is applied to the pixel electrode 322, so that a voltage difference is formed between the pixel electrode 322 and the common electrode 321 and a horizontal electric field is generated ( Fig. 9 and Fig.10 In the embodiment of FIG. 1 , the positive liquid crystal molecules in the second liquid crystal layer 23 are deflected in the horizontal direction, thereby controlling the intensity of light passing through the second liquid crystal layer 23 to achieve grayscale display. The grayscale voltage includes 0 to 255 grayscale voltages. When different grayscale voltages are applied to the pixel electrode 322, the pixel unit presents different brightness, thereby displaying different pictures under wide viewing angles and narrow viewing angles, so as to achieve normal display of the display device under wide viewing angles and narrow viewing angles.

[0078] In the logo pattern display mode and the clock display mode, no voltage (0V) is applied to all the second electrode layers 62, and a voltage (for example, 1~5V) is applied to the third electrode layer 64 to form a voltage difference with the second electrode layer 62, so that the electrochromic layer 63 corresponding to the third electrode layer 64 is controlled to be non-transparent, and the ambient light reflected by the semi-reflective film 20 cannot pass through the area corresponding to the third electrode layer 64. The area corresponding to the third electrode layer 64 is in a dark state, achieving the effect of a black matrix.

[0079] refer to Fig.11 and Fig.12 As shown, in the identification pattern display mode, the display panel is turned off, that is, the dimming box 10, the display liquid crystal box 30 and the backlight module 40 do not apply electrical signals, and the entire display panel reflects ambient light through the semi-transparent and semi-reflective film 20. A common voltage (for example, 0V) is applied to the second electrode layer 62, and no voltage (for example, 0V) is applied to the first electrode block 613 corresponding to the identification pattern area 610, so that the electrochromic layer 63 corresponding to the identification pattern area 610 is controlled to be transparent, that is, the electrochromic device 60 is controlled to be transparent in the identification pattern area 610, and the ambient light reflected by the semi-transparent and semi-reflective film 20 can pass through the identification pattern area 610, and the identification pattern area 610 is bright; while a common voltage (for example, 0V) is applied to the second electrode layer 62, and the first electrode block 613 corresponding to the non-identification pattern area 620 is not applied with a voltage (for example, 0V). A voltage (e.g., 1-5V) is applied to the electrode block 613 and a voltage difference is formed between the electrode block 613 and the second electrode layer 62. The direction of the electric field between the first electrode block 613 corresponding to the non-identification pattern area 620 and the second electrode layer 62 is toward the electrochromic material layer 633, thereby controlling the electrochromic layer 63 corresponding to the non-identification pattern area 620 to be non-transparent, that is, controlling the electrochromic device 60 to be non-transparent in the non-identification pattern area 620, and the ambient light reflected by the semi-reflective film 20 cannot pass through the non-identification pattern area 620, and the non-identification pattern area 620 is in a dark state. The display of the identification pattern is realized by the difference in brightness between the identification pattern area 610 and the non-identification pattern area 620. Among them, the second scanning line 4, the second data line 5 and the second thin film transistor 6 can be used to control any first electrode block 613 to apply voltage or not apply voltage, so that the pattern of the identification pattern area 610 can be adjusted arbitrarily.

[0080] refer to Fig.17As shown, in the clock display mode, the entire display panel is controlled to reflect ambient light, that is, the dimming box 10, the display liquid crystal box 30 and the backlight module 40 do not apply electrical signals, and the entire display panel reflects ambient light through the semi-transparent and semi-reflective film 20. The electrochromic device 60 is controlled to be transparent in the bright stroke area and the logo pattern area 610 of the clock pattern area 630, and to be non-transparent in the dark stroke area and the non-logo pattern area 620 of the clock pattern area 630. Specifically, a common voltage (e.g., 0V) is applied to the second electrode layer 62, and no voltage (e.g., 0V) is applied to the first electrode block 613 corresponding to the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610, so that the electrochromic layer 63 corresponding to the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610 is controlled to be transparent, that is, the electrochromic device 60 is controlled to be transparent in the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610, and the ambient light reflected by the semi-reflective film 20 can pass through the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610, and the bright stroke area of ​​the clock pattern area 630 and the logo pattern area 610 are in a bright state; while a common voltage (e.g., 0V) is applied to the second electrode layer 62, the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area A voltage (e.g., 1-5V) is applied to the first electrode block 613 corresponding to the case area 620, and a voltage difference is formed between the first electrode block 613 and the second electrode layer 62 corresponding to the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area 620. The electric field direction between the first electrode block 613 and the second electrode layer 62 is toward the electrochromic material layer 633, so that the dark stroke area of ​​the clock pattern area 630 and the electrochromic layer 63 corresponding to the non-logo pattern area 620 are controlled to be non-transparent, that is, the electrochromic device 60 is controlled to be non-transparent in the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area 620, and the ambient light reflected by the semi-reflective film 20 cannot pass through the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area 620, and the dark stroke area of ​​the clock pattern area 630 and the non-logo pattern area 620 are in a dark state. The display of the logo pattern and the clock pattern is realized by the difference in brightness between the clock pattern area 63, the logo pattern area 610 and the non-logo pattern area 620.

[0081] Of course, in other embodiments, in the clock display mode, the entire display panel is controlled to reflect ambient light, that is, the dimming box 10, the display liquid crystal box 30 and the backlight module 40 are not applied with electrical signals, and the entire display panel reflects ambient light through the semi-transparent and semi-reflective film 20. The electrochromic device 60 is controlled to be transparent in the bright stroke area of ​​the clock pattern area 630 and non-transparent in the dark stroke area of ​​the clock pattern area 630, the logo pattern area 610 and the non-logo pattern area 620. For details, please refer to the third embodiment.

[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 third embodiment, and will not be described in detail here.

[0083] [Example 5] Fig. 20 Schematic diagram of the structure of the display device in the initial state in the fifth embodiment of the present invention. Fig. 20 As shown, the display device and driving method provided in the fifth embodiment of the present invention are similar to those in the first embodiment ( Figures 1 to 12 )、Example 2 ( Fig.13 )、Example 3 ( Figures 14 to 17 ) and Example 4 ( Figure 18 to Figure 19 ) are substantially the same, except that, in this embodiment: The display panel is a reflective display panel, which can use reflected ambient light to display images. Therefore, the display device does not need to be provided with a backlight module 40, thereby further saving power consumption and reducing the thickness of the box. In the logo pattern display mode and / or the clock display mode, it is only necessary to control the entire reflective display panel to reflect ambient light.

[0084] In this embodiment, the display panel is an electronic ink screen 70. Of course, the display panel may also be other reflective display panels, such as an electrophoretic screen, a dye liquid crystal panel, a cholesterol liquid crystal panel, etc.

[0085] The electronic ink screen 70 includes an opposing substrate 71, a third array substrate 72 arranged opposite to the opposing substrate 71, and an ink capsule 73 located between the opposing substrate 71 and the third array substrate 72. All ink capsules 73 are provided with black ink particles 731 and white ink particles 732 of opposite polarity, and the white ink particles 732 are used to reflect white light. The opposing substrate 71 is located on the side of the electronic ink screen 70 close to the electrochromic device 60, and the third array substrate 72 is located on the side of the electronic ink screen 70 away from the electrochromic device 60. By providing electric fields in different directions to the ink capsules 73, the black ink particles 731 and the white ink particles 732 can move in corresponding directions. For example, the black ink particles 731 are negatively charged and the white ink particles 732 are positively charged, so that the white ink particles 732 move in the direction of the electric field and the black ink particles 731 move in the opposite direction of the electric field. If an electric field is applied in an upward direction, the white ink particles 732 move upward and the black ink particles 731 move downward; if an electric field is applied in a downward direction, the white ink particles 732 move downward and the black ink particles 731 move upward. Of course, the black ink particles 731 may be positively charged and the white ink particles 732 may be negatively charged, so that the black ink particles 731 move in the direction of the electric field and the white ink particles 732 move in the opposite direction of the electric field.

[0086] The third array substrate 72 is provided with pixel electrodes 322, which correspond to the first pixel units P1 one by one, and the opposing substrate 71 is provided with common electrodes 321 that match the pixel electrodes 322. The pixel electrodes 322 are block electrodes corresponding to the first pixel units P1, and the common electrodes 321 are planar electrodes that cover the entire surface of the opposing substrate 71.

[0087] 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 Embodiments 1 to 4, and will not be described in detail here.

[0088] 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.

[0089] 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 display device, characterized in that: It comprises a display panel and an electrochromic device (60) stacked on the light-emitting side of the display panel, wherein the display panel has a reflective structure for reflecting ambient light; The electrochromic device (60) has a graphic identification pattern area (610) and a non-identification pattern area (620), the electrochromic device (60) comprises a first electrode layer (61), a second electrode layer (62), and an electrochromic layer (63) located between the first electrode layer (61) and the second electrode layer (62), the first electrode layer (61) and the second electrode layer (62) cooperate with each other and are used together to control the electrochromic layer (63) to switch between a transparent state and a non-transparent state, the first electrode layers (61) corresponding to the identification pattern area (610) and the non-identification pattern area (620) are insulated and spaced apart from each other, and / or the second electrode layers (62) corresponding to the identification pattern area (610) and the non-identification pattern area (620) are insulated and spaced apart from each other; In the logo pattern display mode, the entire display panel is used to reflect ambient light, the electrochromic layer (63) corresponding to the logo pattern area (610) is in a transparent state, and the electrochromic layer (63) corresponding to the non-logo pattern area (620) is in a non-transparent state.

2. The display device according to claim 1, characterized in that The first electrode layer (61) comprises a first identification pattern electrode (611) corresponding to the identification pattern area (610) and a first non-identification pattern electrode (612) corresponding to the non-identification pattern area (620), and the first identification pattern electrode (611) and the first non-identification pattern electrode (612) are insulated and spaced apart from each other; or the first electrode layer (61) is a planar electrode arranged on the entire surface; The second electrode layer (62) comprises a second identification pattern electrode (621) corresponding to the identification pattern area (610) and a second non-identification pattern electrode (622) corresponding to the non-identification pattern area (620), and the second identification pattern electrode (621) and the second non-identification pattern electrode (622) are insulated and spaced apart from each other; or the second electrode layer (62) is a planar electrode arranged on the entire surface; The electrochromic layer (63) comprises an identification pattern electrochromic layer (63a) corresponding to the identification pattern area (610) and a non-identification pattern electrochromic layer (63b) corresponding to the non-identification pattern area (620), wherein the identification pattern electrochromic layer (63a) and the non-identification pattern electrochromic layer (63b) are spaced apart from each other; or, the electrochromic layer (63) is a planar structure arranged on the entire surface.

3. The display device according to claim 1, characterized in that The display panel has a plurality of first pixel units (P1) distributed in an array, the electrochromic device (60) has a plurality of second pixel units (P2) distributed in an array, the first pixel units (P1) correspond to the second pixel units (P2) one by one, and the identification pattern area (610) and the non-identification pattern area (620) both correspond to the plurality of second pixel units (P2); The first electrode layer (61) comprises a plurality of first electrode blocks (613) distributed in an array, the first electrode blocks (613) and the second pixel units (P2) correspond one to one, and any two of the first electrode blocks (613) are insulated and spaced apart from each other.

4. The display device according to claim 3, characterized in that: The display panel comprises a plurality of first scan lines (1), a plurality of first data lines (2) and a plurality of first thin film transistors (3); the plurality of first scan lines (1) and the plurality of first data lines (2) 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 pixel electrode (322) and the first thin film transistor (3); the pixel electrode (322) is electrically connected to the first scan line (1) and the first data line (2) adjacent to the first thin film transistor (3) through the first thin film transistor (3); The electrochromic device (60) comprises a plurality of second scanning lines (4), a plurality of second data lines (5) and a plurality of second thin film transistors (6); the plurality of second scanning lines (4) and the plurality of second data lines (5) are insulated from each other and cross-defined to form a plurality of second pixel units (P2); each of the second pixel units (P2) is provided with the first electrode block (613) and the second thin film transistor (6); the first electrode block (613) is electrically connected to the second scanning line (4) and the second data line (5) adjacent to the second thin film transistor (6) through the second thin film transistor (6).

5. The display device according to claim 3, characterized in that: The electrochromic device (60) comprises a third electrode layer (64) matched with the second electrode layer (62); the third electrode layer (64) and the first electrode layer (61) are located on the same side of the electrochromic layer (63) and are insulated and spaced apart from each other; the third electrode layer (64) is a grid-like structure and its projection on the electrochromic device (60) spaces a plurality of the second pixel units (P2) apart from each other; the electrochromic layer (63) is provided between the second electrode layer (62) and the third electrode layer (64).

6. The display device according to claim 3, characterized in that: The electrochromic device (60) has a graphic clock pattern area (630), and the clock pattern area (630) corresponds to a plurality of the second pixel units (P2).

7. The display device according to any one of claims 1 to 6, characterized in that: The display panel is a transmissive display panel, the display device comprises a backlight module (40), the backlight module (40) is arranged on the light incident side of the display panel, the display panel comprises a dimming box (10) and a display liquid crystal box (30) which are stacked on each other, the dimming box (10) is arranged between the display liquid crystal box (30) and the electrochromic device (60), the reflective structure is a semi-transmissive and semi-reflective film (20), the semi-transmissive and semi-reflective film (20) is arranged between the dimming box (10) and the display liquid crystal box (30), the dimming box (10) is used to control the switching of wide and narrow viewing angles, and the display liquid crystal box (30) is used to control the grayscale display of the picture; Alternatively, the display panel is a reflective display panel, and the reflective display panel can display images using reflected ambient light.

8. A method for driving a display device, characterized in that: The driving method is used to drive the display device according to any one of claims 1 to 7, and the driving method comprises: In the picture display mode, the entire electrochromic device (60) is controlled to be in a transparent state, and the display panel controls the picture display; In the identification pattern display mode, the entire display panel is controlled to reflect ambient light, and the electrochromic device (60) is controlled to be transparent in the identification pattern area (610) and non-transparent in the non-identification pattern area (620).

9. The method for driving a display device according to claim 8, characterized in that: The display panel has a plurality of first pixel units (P1) distributed in an array, the electrochromic device (60) has a plurality of second pixel units (P2) distributed in an array, the first pixel units (P1) correspond to the second pixel units (P2) one by one, the identification pattern area (610) and the non-identification pattern area (620) both correspond to a plurality of the second pixel units (P2), the electrochromic device (60) comprises a third electrode layer (64) matched with the second electrode layer (62), the third electrode layer (64) and the first electrode layer (61) are located on the same side of the electrochromic layer (63) and are insulated and spaced apart from each other, the projection of the third electrode layer (64) on the electrochromic device (60) spaces the plurality of the second pixel units (P2) apart from each other, the electrochromic layer (63) is provided between the second electrode layer (62) and the third electrode layer (64), and the driving method comprises: In the picture display mode and the logo pattern display mode, the electrochromic layer (63) between the second electrode layer (62) and the third electrode layer (64) is controlled to be in a non-transparent state.

10. The method for driving a display device according to claim 8, wherein: The display panel has a plurality of first pixel units (P1) distributed in an array, the electrochromic device (60) has a plurality of second pixel units (P2) distributed in an array, the first pixel units (P1) correspond to the second pixel units (P2) one by one, the identification pattern area (610) and the non-identification pattern area (620) both correspond to the plurality of second pixel units (P2), the electrochromic device (60) has a patterned clock pattern area (630), the clock pattern area (630) corresponds to the plurality of second pixel units (P2), and the driving method comprises: In a clock display mode, the entire display panel is controlled to reflect ambient light, and the electrochromic device (60) is controlled so that both the bright stroke area of ​​the clock pattern area (630) and the logo pattern area (610) are in a transparent state, and the dark stroke area of ​​the clock pattern area (630) and the non-logo pattern area (620) are in a non-transparent state; Alternatively, in the clock display mode, the entire display panel is controlled to reflect ambient light, and the electrochromic device (60) is controlled to be transparent in the bright stroke area of ​​the clock pattern area (630) and to be non-transparent in the dark stroke area of ​​the clock pattern area (630), the logo pattern area (610) and the non-logo pattern area (620).

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