Display apparatus and control method

Abstract

The invention discloses a display device and a control method. The display device comprises a backlight module, a display liquid crystal box and an identification pattern reflecting layer arranged on the light emitting side of the display liquid crystal box. The display device is provided with a graphical identification pattern area, the identification pattern reflecting layer is provided with a graphical reflecting area, the projection of the reflecting area on the display device coincides with the identification pattern area, the identification pattern reflecting layer comprises a reflecting metal layer, and the reflecting metal layer is of a grid structure and is provided with a plurality of first light holes. The reflective metal layer is at least located in the reflective region. An identification pattern reflecting layer is arranged on the light emitting side of a display liquid crystal box, a reflecting metal layer of the identification pattern reflecting layer is of a grid structure and is provided with a plurality of first light holes, the reflecting metal layer is at least located in an identification pattern area, and the reflecting metal layer can transmit backlight and can also reflect ambient light; and the corresponding identification pattern is displayed by using the ambient light reflected by the reflection metal layer in the reflection region, so that the power consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display device and control method. Background Technology

[0002] With the development of display technology, thin and light display devices are increasingly favored by consumers, especially thin and light liquid crystal displays (LCDs). An existing display device includes a thin film transistor array substrate (TFT array substrate), a color filter substrate (CF substrate), and liquid crystal molecules filled between the TFT array substrate and the color filter substrate. When the display device is in operation, a driving voltage is applied to the pixel electrodes on the TFT array substrate, controlling the formation of a driving electric field between the pixel electrodes and the common electrode. This drives the liquid crystal molecules to deflect, refracting the backlight provided by the backlight module of the display device, thereby displaying an image.

[0003] To enhance product competitiveness, existing display devices can still display the product's logo even when showing a screen with a narrow viewing angle. However, in existing technologies, the logo is only visible at a wide viewing angle within the narrow viewing angle, and the backlight and LCD cell need to be turned on to display the logo, resulting in high power consumption. This makes it impossible to simultaneously meet the needs of displaying the screen when the device is powered on and displaying the logo with low power consumption when the device is powered off. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the prior art, the present invention aims to provide a display device and control method to solve the problem of high power consumption when displaying logo patterns in the prior art.

[0005] The objective of this invention is achieved through the following technical solution: The present invention provides a display device, the display device comprising a display liquid crystal cell, a marking pattern reflective layer disposed on the light emitting side of the display liquid crystal cell, and a backlight module disposed on the light incident side of the display liquid crystal cell; The display device has a graphic logo pattern area, and the logo pattern reflective layer has a graphic reflective area. The projection of the reflective area on the display device coincides with the logo pattern area. The logo pattern reflective layer includes a reflective metal layer. The reflective metal layer has a grid structure and has a plurality of first light-transmitting holes. The reflective metal layer is located at least within the reflective area. When the logo pattern is displayed in reflection, the backlight module is turned off, so that the reflective metal layer in the reflective area reflects the corresponding logo pattern.

[0006] Furthermore, the area of ​​the display device other than the marked pattern area is a non-marked pattern area, and the marked pattern reflective layer has a patterned light-absorbing area, the projection of the light-absorbing area on the display device coincides with the non-marked pattern area; The reflective metal layer is a full-surface structure that covers the reflective area and the light-absorbing area. The logo pattern reflective layer includes a light-absorbing layer stacked on the side of the reflective metal layer closest to the external environment. The light-absorbing layer is located within the light-absorbing area. The light-absorbing layer has a grid structure and multiple second light-transmitting holes. The projection of the light-absorbing layer on the display device coincides with the reflective metal layer within the light-absorbing area.

[0007] Furthermore, the display liquid crystal cell includes a color filter substrate, an array substrate disposed opposite to the color filter substrate, and a first liquid crystal layer disposed between the color filter substrate and the array substrate; a first polarizer is disposed on the color filter substrate, a second polarizer is disposed on the array substrate, the light transmission axis of the first polarizer is perpendicular to the light transmission axis of the second polarizer, and the marking pattern reflective layer is disposed between the color filter substrate and the first polarizer.

[0008] Furthermore, the reflective layer of the logo pattern includes a transparent conductive layer, which has a full-surface structure and at least covers the reflective metal layer.

[0009] Furthermore, the reflective layer of the logo pattern includes an insulating layer that is disposed over the entire surface, and the side of the insulating layer facing the external environment has multiple raised structures.

[0010] Furthermore, the display device includes an identification control liquid crystal cell disposed on the light-emitting side of the display liquid crystal cell. The identification control liquid crystal cell includes an upper substrate, a lower substrate disposed opposite to the upper substrate, and a second liquid crystal layer disposed between the upper substrate and the lower substrate. The upper substrate has a first control electrode on the side facing the second liquid crystal layer, and the lower substrate has a second control electrode on the side facing the second liquid crystal layer that cooperates with the first control electrode. The marking pattern reflective layer is disposed on the side of the second liquid crystal layer facing the display liquid crystal cell. The upper substrate is provided with a third polarizer and a quarter-wave plate stacked on top of each other. The quarter-wave plate is located between the upper substrate and the third polarizer, and the fast and slow axes of the quarter-wave plate are at 45° to the light transmission axis of the third polarizer.

[0011] Furthermore, the marking pattern reflective layer is disposed on the side of the lower substrate facing the second liquid crystal layer, and the second control electrode includes at least the reflective metal layer.

[0012] Furthermore, the second liquid crystal layer uses positive liquid crystal molecules, and the alignment direction of the second liquid crystal layer on the side near the upper substrate is perpendicular to the alignment direction on the side near the lower substrate.

[0013] This application also provides a control method for a display device, used to control the display device as described above, the control method comprising: When the logo pattern is displayed in the reflective area, the backlight module is turned off, and the corresponding logo pattern is displayed by the reflected light from the reflective metal layer in the reflective area. When displaying a transmissive image, both the backlight module and the display LCD cell are turned on. The transmittance of the backlight is adjusted through the display LCD cell to display the corresponding image.

[0014] Furthermore, the display device includes a mark-controlled liquid crystal cell disposed on the light-emitting side of the display liquid crystal cell, the mark pattern reflective layer is disposed on the side of the second liquid crystal layer facing the display liquid crystal cell, the upper substrate is provided with a third polarizer and a quarter-wave plate stacked on top of each other, the quarter-wave plate is located between the upper substrate and the third polarizer, and the fast and slow axes of the quarter-wave plate are at 45° with the transmission axis of the third polarizer, and the control method includes: When displaying a logo pattern via reflection, the second liquid crystal layer in the logo control liquid crystal cell is controlled to have a phase delay of λ / 4; when displaying a screen via transmission, the second liquid crystal layer in the logo control liquid crystal cell is controlled to be in a standing position.

[0015] The beneficial effects of this invention are as follows: By setting a reflective layer for the identification pattern on the light-emitting side of the display liquid crystal cell, the reflective metal layer of the identification pattern reflective layer has a grid structure and multiple first light-transmitting holes. The reflective metal layer is located at least in the reflective area corresponding to the identification pattern area. The reflective metal layer can not only transmit backlight but also reflect ambient light. When reflecting the identification pattern, the backlight module is turned off, and the corresponding identification pattern is displayed using the ambient light reflected by the reflective metal layer in the reflective area, thereby reducing the power consumption of the identification pattern display. When transmitting the image, the brightness of the transmitted backlight is much greater than the brightness of the ambient light reflected by the reflective metal layer. Therefore, the identification pattern cannot be seen clearly. The ambient light reflected by the reflective metal layer has almost no impact on the transmitted image, thus realizing automatic display of the identification pattern when the screen is off and automatic disappearance of the identification pattern when the power is on. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the display device in its initial state according to Embodiment 1 of the present invention.

[0017] Figure 2 This is a schematic diagram of the planar structure of the display device in Embodiment 1 of the present invention.

[0018] Figure 3 This is a schematic diagram of the planar structure of the reflective layer of the marking pattern in Embodiment 1 of the present invention.

[0019] Figure 4 This is a schematic diagram of the planar structure of the reflective metal layer in Embodiment 1 of the present invention.

[0020] Figure 5 This is a schematic diagram of the planar structure of the light-absorbing layer in Embodiment 1 of the present invention.

[0021] Figure 6 This is a schematic diagram of the planar structure of the array substrate in Embodiment 1 of the present invention.

[0022] Figure 7 This is a schematic diagram of the planar structure of the color filter substrate in Embodiment 1 of the present invention.

[0023] Figures 8a-8e This is a schematic diagram of the manufacturing process of the reflective layer for the marking pattern in Embodiment 1 of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of the display device in Embodiment 1 of the present invention when displaying a logo pattern by reflection.

[0025] Figure 10 This is a schematic diagram of the display device in Embodiment 1 of the present invention when displaying a screen via transmission.

[0026] Figure 11 This is a schematic diagram of the display device in its initial state according to Embodiment 2 of the present invention.

[0027] Figure 12 This is a schematic diagram of the planar structure of the reflective metal layer in Embodiment 2 of the present invention.

[0028] Figure 13 This is a schematic diagram of the display device in its initial state according to Embodiment 3 of the present invention.

[0029] Figure 14 This is a schematic diagram of the driving signals of the display device when reflecting and displaying the logo pattern in Embodiment 3 of the present invention.

[0030] Figure 15 This is a schematic diagram of the structure of the display device in Embodiment 3 of the present invention when displaying a logo pattern by reflection.

[0031] Figure 16 This is an optical path analysis diagram of the display device in Embodiment 3 of the present invention when displaying a logo pattern by reflection.

[0032] Figure 17This is a schematic diagram of the driving signals of the display device when displaying a transmissive image in Embodiment 3 of the present invention.

[0033] Figure 18 This is a schematic diagram of the display device in Embodiment 3 of the present invention when displaying a screen via transmission.

[0034] Figure 19 This is an optical path analysis diagram of the display device in Embodiment 3 of the present invention when displaying a transmissive image.

[0035] Figure 20 This is a schematic diagram of the display device in its initial state according to Embodiment 4 of the present invention. Detailed Implementation

[0036] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific implementation methods, structures, features, and effects of the display device and control method proposed according to the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments: [Example 1] Figure 1 This is a schematic diagram of the display device in its initial state according to Embodiment 1 of the present invention. Figure 2 This is a schematic diagram of the planar structure of the display device in Embodiment 1 of the present invention. Figure 3 This is a schematic diagram of the planar structure of the reflective layer of the marking pattern in Embodiment 1 of the present invention. Figure 4 This is a schematic diagram of the planar structure of the reflective metal layer in Embodiment 1 of the present invention. Figure 5 This is a schematic diagram of the planar structure of the light-absorbing layer in Embodiment 1 of the present invention. Figure 6 This is a schematic diagram of the planar structure of the array substrate in Embodiment 1 of the present invention. Figure 7 This is a schematic diagram of the planar structure of the color filter substrate in Embodiment 1 of the present invention.

[0037] like Figures 1 to 7 As shown in Embodiment 1 of the present invention, a display device includes a display liquid crystal cell 10, a marking pattern reflective layer 30 disposed on the light-emitting side of the display liquid crystal cell 10, and a backlight module 50 disposed on the light-receiving side of the display liquid crystal cell 10. Specifically, the backlight module 50, the display liquid crystal cell 10, and the marking pattern reflective layer 30 are sequentially stacked on the side facing closer to ambient light. The display liquid crystal cell 10 is used to control the display device to display a normal image, the backlight module 50 is used to provide a backlight source for the display liquid crystal cell 10, and the marking pattern reflective layer 30 is used to display a marking pattern by reflecting ambient light.

[0038] like Figure 2As shown, the display device has a graphical logo pattern area 110 and a non-logo pattern area 120 located around the logo pattern area 110. That is, the other areas of the display device besides the logo pattern area 110 are the non-logo pattern area 120. The graphic of the logo pattern area 110 can be set according to the logo pattern (LOGO pattern) that needs to be displayed (in this embodiment, the letters "IVO" are used as the LOGO pattern that needs to be displayed in the logo pattern area 110).

[0039] The logo pattern reflective layer 30 has a graphic reflective area F, the projection of which onto the display device coincides with the logo pattern area 110. The logo pattern reflective layer 30 includes a reflective metal layer 31, which has a grid structure and multiple first light-transmitting holes 311. These holes 311 are uniformly distributed on the reflective metal layer 31, which is located at least within the reflective area F. Because the reflective metal layer 31 has a grid structure and multiple first light-transmitting holes 311, it can transmit backlight and reflect ambient light. When displaying the logo pattern, the backlight module 50 is turned off, and the ambient light reflected by the reflective metal layer 31 within the reflective area F is used to display the corresponding logo pattern, thereby reducing the power consumption of the logo pattern display. However, when displaying the image through transmission, the brightness of the transmitted backlight is much greater than the brightness of the ambient light reflected by the reflective metal layer 31. Therefore, the logo pattern cannot be clearly seen, and the ambient light reflected by the reflective metal layer 31 has virtually no impact on the transmitted image, thus achieving automatic display of the logo pattern when the screen is off and automatic disappearance of the logo pattern when the device is on. The reflective metal layer 31 can be made of a metal with high reflectivity, such as aluminum or silver. The porosity of the reflective metal layer 31 can also be set according to actual needs. For example, if the porosity of the reflective metal layer 31 is 80%, then the light transmittance is 80% and the reflectivity is 20%.

[0040] Since the reflective metal layer 31 itself is opaque and transmits light through the first light-transmitting hole 311, if the reflective metal layer 31 is only provided in the reflective area F, this will cause a difference in the light transmittance between the marking pattern area 110 and the non-marking pattern area 120, affecting the transmission display effect. If the reflective metal layer 31 is provided over the entire surface, it will cause the non-marking pattern area 120 to also reflect light, making it impossible to display the pattern. Therefore, the marking pattern reflective layer 30 of this application has a graphic light-absorbing area X, and the projection of the light-absorbing area X on the display device coincides with the non-marking pattern area 120. The reflective metal layer 31 has a full-surface structure and covers the reflective area F and the light-absorbing area X. The marking pattern reflective layer 30 includes a light-absorbing layer 32 stacked on the side of the reflective metal layer 31 closest to the external environment. The light-absorbing layer 32 is located in the light-absorbing area X. The light-absorbing layer 32 has a grid structure and has multiple second light-transmitting holes 321. The second light-transmitting holes 321 are evenly distributed on the light-absorbing layer 32. The projection of the light-absorbing layer 32 on the display device coincides with the reflective metal layer 31 in the light-absorbing area X. That is, in the light-absorbing area X, the second light-transmitting holes 321 correspond one-to-one with the first light-transmitting holes 311 and coincide.

[0041] By providing a reflective metal layer 31 covering the entire surface of the marking pattern area 110 and the non-marking pattern area 120, the difference in light transmittance between the marking pattern area 110 and the non-marking pattern area 120 can be avoided, thus preventing any impact on the transmission display effect. The reflective metal layer 31 also acts as a shield, preventing static electricity from affecting the deflection of the liquid crystal within the display liquid crystal cell 10. Furthermore, a light-absorbing layer 32 overlapping with the reflective metal layer 31 is provided within the light-absorbing area X, preventing the reflective metal layer 31 in the non-marking pattern area 120 from reflecting ambient light. Additionally, the reflective metal layer 31 can reflect backlight, allowing some of the backlight to be reflected back for reuse, thus preventing direct absorption by the light-absorbing layer 32 and reducing the utilization rate of the backlight. The light-absorbing layer 32 can be made of MoOx (molybdenum oxide), which, while having light-absorbing properties, also possesses a certain degree of conductivity, further enhancing the shielding effect and preventing static electricity from affecting the deflection of the liquid crystal within the display liquid crystal cell 10. Alternatively, the light-absorbing layer 32 can also be made of resin materials, such as black matrix (BM). The porosity of the light-absorbing layer 32 is the same as that of the reflective metal layer 31, thereby ensuring that the reflective metal layer 31 in the light-absorbing region X is completely covered by the light-absorbing layer 32.

[0042] Furthermore, the marking pattern reflective layer 30 includes a transparent conductive layer 33, which is a full-surface structure and at least covers the reflective metal layer 31. In this embodiment, the transparent conductive layer 33 is a full-surface structure and covers the reflective metal layer 31 and the light-absorbing layer 32, thereby further improving the shielding effect and preventing electrostatic discharge from affecting the deflection of the liquid crystal in the display liquid crystal cell 10. Optionally, the marking pattern reflective layer 30 includes a full-surface insulating layer 34, which covers the surface of the transparent conductive layer 33. For example, the insulating layer 34 can be made of OC material, thereby providing a planarization effect on the marking pattern reflective layer 30. The transparent conductive layer 33 can be made of transparent conductive materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0043] Figures 8a-8e This is a schematic diagram illustrating the manufacturing process of the reflective layer for the marking pattern in Embodiment 1 of the present invention. Figures 8a-8e As shown, the manufacturing process of the reflective layer 30 for the logo pattern is as follows: like Figure 8a and Figure 8b As shown, a reflective metal thin film 2 is deposited over the entire surface of substrate 1. The reflective metal thin film 2 is then etched to form a reflective metal layer 31 with a mesh structure. The marking pattern area 110 and the non-marking pattern area 120 are both located within the reflective metal layer 31. The reflective metal layer 31 is made of a metal with high reflectivity, such as aluminum or silver. The porosity of the reflective metal layer 31 can also be set according to actual needs. For example, if the porosity of the reflective metal layer 31 is 80%, then the light transmittance is 80% and the reflectivity is 20%.

[0044] like Figure 8c and Figure 8d As shown, a light-absorbing thin film 3 is deposited over the entire surface of the substrate 1, covering the reflective metal layer 31. The light-absorbing thin film 3 is then etched to form a light-absorbing layer 32 with a grid structure. Only the non-marked pattern area 120 has the light-absorbing layer 32. The projection of the light-absorbing layer 32 onto the display device coincides with the reflective metal layer 31 within the non-marked pattern area 120, while the light-absorbing thin film 3 in the marked pattern area 110 is completely etched away. The light-absorbing layer 32 can be made of MoOx (molybdenum oxide), which, while having light-absorbing properties, also possesses a certain degree of conductivity, thereby further enhancing the shielding effect and preventing electrostatic discharge from affecting the deflection of the liquid crystal within the display liquid crystal cell 10. Alternatively, the light-absorbing layer 32 can also be made of resin materials, such as black matrix (BM).

[0045] like Figure 8eAs shown, a transparent conductive layer 33 and an insulating layer 34 are then sequentially applied onto the substrate 1. The transparent conductive layer 33 can be made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO), which can further enhance the shielding effect and prevent electrostatic discharge from affecting the deflection of the liquid crystal within the display liquid crystal cell 10. For example, the insulating layer 34 can be made of OC material, which can planarize the marking pattern reflective layer 30.

[0046] The display liquid crystal cell 10 includes a color filter substrate 11, an array substrate 12 disposed opposite to the color filter substrate 11, and a first liquid crystal layer 13 disposed between the color filter substrate 11 and the array substrate 12. The color filter substrate 11 is disposed on the side of the display liquid crystal cell 10 near the marking pattern reflective layer 30, and the array substrate 12 is disposed on the side of the display liquid crystal cell 10 near the backlight module 50. The first liquid crystal layer 13 may use positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. In the initial state, the positive liquid crystal molecules in the first liquid crystal layer 13 are aligned parallel to the color filter substrate 11 and the array substrate 12, and the alignment direction of the positive liquid crystal molecules on the side near the color filter substrate 11 is parallel or antiparallel to the alignment direction of the positive liquid crystal molecules on the side near the array substrate 12. Of course, in other embodiments, the first liquid crystal layer 13 may also use negative liquid crystal molecules, and the negative liquid crystal molecules in the first liquid crystal layer 13 may be aligned perpendicular to the color filter substrate 11 and the array substrate 12.

[0047] A first polarizer 41 is provided on the color filter substrate 11, and a second polarizer 42 is provided on the array substrate 12. The transmission axis of the first polarizer 41 is perpendicular to the transmission axis of the second polarizer 42. The marking pattern reflective layer 30 is disposed between the color filter substrate 11 and the first polarizer 41, so that the first polarizer 41 can protect the marking pattern reflective layer 30. For example, the transmission axis of the first polarizer 41 is 0°, and the transmission axis of the second polarizer 42 is 90°. like Figure 1 and Figure 7 As shown, the color filter substrate 11 is provided with color resist layers 112 arranged in an array and black matrix 111 separating the color resist layers 112. The color resist layers 112 include color resist materials of red (R), green (G) and blue (B) colors, and correspondingly form sub-pixels of red (R), green (G) and blue (B) colors.

[0048] like Figure 1 and Figure 6As shown, the array substrate 12 has multiple pixel units P formed by multiple scan lines and multiple data lines that are mutually insulated and intersecting on the side facing the first liquid crystal layer 13. Each pixel unit P has a pixel electrode 122 and a thin-film transistor. The pixel electrode 122 is electrically connected to the data line of the adjacent thin-film transistor through the thin-film transistor. The thin-film transistor includes a gate, an active layer, a drain, and a source. The gate and the scan line are located on the same layer and are electrically connected. The gate and the active layer are isolated by an insulating layer. The source is electrically connected to the data line, and the drain is electrically connected to the pixel electrode 122 through a contact hole.

[0049] like Figure 1 As shown, in this embodiment, a common electrode 121 is further provided on the side of the array substrate 12 facing the first liquid crystal layer 13. The common electrode 121 and the pixel electrode 122 are located on different layers and are insulated from each other by an insulating layer. The common electrode 121 may be located above or below the pixel electrode 122. Figure 1 The diagram shows the common electrode 121 located below the pixel electrode 122. Preferably, the common electrode 121 is a planar electrode with its entire surface, and the pixel electrode 122 is a slit electrode with multiple electrode strips in each pixel unit P to form a fringe field switching (FFS) mode. Of course, in other embodiments, the pixel electrode 122 and the common electrode 121 may be located on the same layer, but they are insulated from each other. Each of the pixel electrode 122 and the common electrode 121 may include multiple electrode strips, and the electrode strips of the pixel electrode 122 and the common electrode 121 are arranged alternately to form an in-plane switching (IPS) mode; or, in other embodiments, the array substrate 12 has a pixel electrode 122 on the side facing the first liquid crystal layer 13, and the color filter substrate 11 has a common electrode 121 on the side facing the first liquid crystal layer 13 to form a TN mode or a VA mode.

[0050] The color filter substrate 11 and the array substrate 12 can be made of materials such as glass, acrylic, and polycarbonate. The common electrode 121 and the pixel electrode 122 can be made of materials such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0051] Figure 9 This is a schematic diagram of the structure of the display device in Embodiment 1 of the present invention when displaying a logo pattern by reflection. Figure 10 This is a schematic diagram of the display device in Embodiment 1 of the present invention when displaying a transmissive image. Figure 9 and Figure 10 As shown, this application also provides a control method for a display device, used to control the display device as described above. The control method includes: like Figure 9As shown, when displaying the logo pattern, the backlight module 50 and the display LCD cell 10 are turned off. The corresponding logo pattern is displayed by the reflected light of the reflective metal layer 31 in the reflective area F. That is, the entire display device does not need to be powered on. The corresponding logo pattern is displayed by using the ambient light reflected by the reflective metal layer 31 in the reflective area F, thereby reducing the power consumption of the logo pattern display.

[0052] like Figure 10 As shown, when the image is displayed via transmission, both the backlight module 50 and the display LCD cell 10 are turned on. The backlight transmittance is adjusted by the display LCD cell 10 to display the corresponding image. Since the reflective metal layer 31 has a grid structure and multiple first light-transmitting holes 311, it can transmit backlight and reflect ambient light. The light-absorbing layer 32 also has a grid structure and multiple second light-transmitting holes 321. When the image is displayed via transmission, the backlight passes through the marking pattern reflective layer 30 from the first light-transmitting holes 311 and the second light-transmitting holes 321. The brightness of the transmitted backlight is much greater than the brightness of the ambient light reflected by the reflective metal layer 31. Therefore, the marking pattern cannot be seen clearly. The ambient light reflected by the reflective metal layer 31 has almost no effect on the image displayed via transmission, thus achieving automatic display of the marking pattern when the screen is off and automatic disappearance of the marking pattern when the screen is on.

[0053] [Example 2] Figure 11 This is a schematic diagram of the display device in its initial state according to Embodiment 2 of the present invention. Figure 12 This is a schematic diagram of the planar structure of the reflective metal layer in Embodiment 2 of the present invention. Figure 11 and Figure 12 As shown, the display device and control method provided in Embodiment 2 of the present invention are the same as those in Embodiment 1. Figures 1 to 10 The display devices and control methods in the two are basically the same, the difference being: In this embodiment, the reflective metal layer 31 is a patterned structure and only covers the reflective area F. That is, the reflective metal layer 31 is only provided in the marking pattern area 110, while the non-marking pattern area 120 does not need to be provided with the reflective metal layer 31. Therefore, the non-marking pattern area 120 cannot reflect ambient light, and there is no need to provide the light-absorbing layer 32, which greatly reduces the thickness and manufacturing difficulty of the marking pattern reflective layer 30.

[0054] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

[0055] [Example 3] Figure 13 This is a schematic diagram of the display device in its initial state according to Embodiment 3 of the present invention. Figure 13 As shown, the display device and control method provided in Embodiment 3 of the present invention are the same as those in Embodiment 1. Figures 1 to 10Example 2 Figure 11 and Figure 12 The display devices and control methods in the two are basically the same, the difference being that... In this embodiment, the display device includes an identification control liquid crystal cell 20 disposed on the light-emitting side of the display liquid crystal cell 10. The identification control liquid crystal cell 20 includes an upper substrate 21, a lower substrate 22 disposed opposite to the upper substrate 21, and a second liquid crystal layer 23 disposed between the upper substrate 21 and the lower substrate 22. The upper substrate 21 is disposed on the side of the identification control liquid crystal cell 20 closest to the external environment, and the lower substrate 22 is disposed on the side of the identification control liquid crystal cell 20 closest to the display liquid crystal cell 10. The second liquid crystal layer 23 may use positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. In the initial state, the alignment direction of the second liquid crystal layer 23 on the side closest to the upper substrate 21 is perpendicular to the alignment direction on the side closest to the lower substrate 22, thereby causing the second liquid crystal layer 23 to be twisted 90° from top to bottom to form a TN alignment mode.

[0056] The upper substrate 21 has a first control electrode 211 on the side facing the second liquid crystal layer 23, and the lower substrate 22 has a second control electrode on the side facing the second liquid crystal layer 23 that cooperates with the first control electrode 211. Both the first control electrode 211 and the second control electrode are structured to cover the entire surface, thereby controlling the deflection of the entire second liquid crystal layer 23.

[0057] In this embodiment, the marking pattern reflective layer 30 is disposed on the side of the second liquid crystal layer 23 facing the display liquid crystal cell 10. The upper substrate 21 is provided with a third polarizer 43 and a quarter-wave plate 44 stacked on top of each other. The quarter-wave plate 44 is located between the upper substrate 21 and the third polarizer 43, and the fast and slow axes of the quarter-wave plate 44 are at 45° to the transmission axis of the third polarizer 43. The transmission axis of the first polarizer 41 can be parallel to or perpendicular to the transmission axis of the third polarizer 43, as long as the transmission axis of the first polarizer 41 is at 45° to the fast and slow axes of the quarter-wave plate 44.

[0058] Optionally, the marking pattern reflective layer 30 is disposed on the side of the lower substrate 22 facing the second liquid crystal layer 23, and the second control electrode includes at least a reflective metal layer 31. In this embodiment, since the marking pattern reflective layer 30 includes conductive film layers such as a reflective metal layer 31, a light-absorbing layer 32, and a transparent conductive layer 33, the second control electrode includes a reflective metal layer 31, a light-absorbing layer 32, and a transparent conductive layer 33. Thus, the conductive film layer of the marking pattern reflective layer 30 cooperates with the first control electrode 211 to control the deflection of the entire second liquid crystal layer 23, so that the lower substrate 22 does not need to be fabricated with other electrodes, reducing cell thickness and manufacturing costs.

[0059] This application also provides a control method for a display device, used to control the display device as described above. The control method includes: Figure 14 This is a schematic diagram of the driving signals of the display device when reflecting and displaying the logo pattern in Embodiment 3 of the present invention. Figure 15 This is a schematic diagram of the structure of the display device in Embodiment 3 of the present invention when displaying a logo pattern by reflection. Figure 16 This is an optical path analysis diagram of the display device in Embodiment 3 of the present invention when reflecting and displaying a logo pattern. For example... Figures 14 to 16 As shown, when displaying the logo pattern, the backlight module 50 and the display liquid crystal cell 10 are turned off, and the second liquid crystal layer 23 in the logo control liquid crystal cell 20 is controlled to have a phase delay of λ / 4. The corresponding logo pattern is displayed by the reflected light of the reflective metal layer 31 in the reflective area F, and the corresponding logo pattern is displayed by the ambient light reflected by the reflective metal layer 31 in the reflective area F, thereby reducing the power consumption of the logo pattern display.

[0060] Specifically, such as Figure 14 As shown, a first voltage signal V1 is applied to the first control electrode 211, and a second voltage signal V2 is applied to the second control electrode (reflective metal layer 31, light-absorbing layer 32, and transparent conductive layer 33) to control the second liquid crystal layer 23 in the label-controlled liquid crystal cell 20 to have a phase delay of λ / 4. In this embodiment, the alignment direction of the second liquid crystal layer 23 near the upper substrate 21 is perpendicular to the alignment direction near the lower substrate 22. The second liquid crystal layer 23 is twisted 90° from top to bottom, which is a TN alignment mode. That is, the second liquid crystal layer 23 is adjusted to have a phase delay of λ / 4 during alignment. Therefore, the first voltage signal V1 and the second voltage signal V2 can both be common voltage signals or directly grounded. Of course, the label-controlled liquid crystal cell 20 can also be directly turned off, so that the second liquid crystal layer 23 maintains its initial 90° twist state.

[0061] like Figure 16 As shown, when the logo pattern is displayed by reflection, ambient light I passes through the third polarizer 43 and forms 0° linearly polarized light parallel to the transmission axis of the third polarizer 43. After passing through the quarter-wave plate 44, it becomes circularly polarized light (e.g., right-handed). After passing through the second liquid crystal layer 23, it becomes linearly polarized light again. The linearly polarized light is reflected back by the reflective metal layer 31. After passing through the second liquid crystal layer 23 again, it becomes elliptically polarized light (e.g., right-handed). Then, after passing through the quarter-wave plate 44, it becomes 0° linearly polarized light parallel to the transmission axis of the third polarizer 43 and is emitted from the third polarizer 43, thus making the logo pattern area 110 bright. The ambient light in the non-logo pattern area 120 is absorbed by the light-absorbing layer 32 and becomes dark. The logo pattern is displayed by the difference in brightness between the logo pattern area 110 and the non-logo pattern area 120.

[0062] Figure 17This is a schematic diagram of the driving signals of the display device when displaying a transmissive image in Embodiment 3 of the present invention. Figure 18 This is a schematic diagram of the display device in Embodiment 3 of the present invention when displaying a screen via transmission. Figure 19 This is an optical path analysis diagram of the display device in Embodiment 3 of the present invention when displaying a transmissive image. For example... Figures 17 to 19 As shown, when the image is displayed via transmission, both the backlight module 50 and the display LCD cell 10 are turned on. The second liquid crystal layer 23 in the control LCD cell 20 is in a standing position. The backlight transmittance is adjusted by the display LCD cell 10 to display the corresponding image. Since the reflective metal layer 31 has a grid structure and multiple first light-transmitting holes 311, it can transmit backlight and reflect ambient light. The light-absorbing layer 32 also has a grid structure and multiple second light-transmitting holes 321. When the image is displayed via transmission, the backlight passes through the first and second light-transmitting holes 311 and the second light-transmitting holes 321 through the logo pattern reflective layer 30. The brightness of the transmitted backlight is much greater than the brightness of the ambient light reflected by the reflective metal layer 31. Therefore, the logo pattern cannot be seen clearly. The ambient light reflected by the reflective metal layer 31 has almost no effect on the image displayed via transmission, thus achieving automatic display of the logo pattern when the screen is off and automatic disappearance of the logo pattern when the screen is on.

[0063] Specifically, such as Figure 17 As shown, a first voltage signal V1 is applied to the first control electrode 211, and a second voltage signal V2 is applied to the second control electrode (reflective metal layer 31, light-absorbing layer 32, and transparent conductive layer 33). The first voltage signal V1 is a common voltage, and the second voltage signal V2 is, for example, a 5V AC voltage. The first control electrode 211 and the second control electrode form a strong vertical electric field to control the second liquid crystal layer 23 in the liquid crystal cell 20 to stand upright. At this time, the second liquid crystal layer 23 has basically no phase delay.

[0064] like Figure 19As shown, when the image is transmitted, ambient light I passes through the third polarizer 43 and forms 0° linearly polarized light parallel to the transmission axis of the third polarizer 43. After passing through the quarter-wave plate 44, it becomes circularly polarized light (e.g., right-handed). After passing through the second liquid crystal layer 23, it is still circularly polarized light (e.g., right-handed). The circularly polarized light (e.g., right-handed) is reflected by the reflective metal layer 31 and its rotation direction is reversed. After passing through the second liquid crystal layer 23 again, it becomes circularly polarized light (e.g., right-handed). Then, after passing through the quarter-wave plate 44, it becomes 90° linearly polarized light perpendicular to the transmission axis of the third polarizer 43 and is absorbed by the third polarizer 43. This prevents the marking pattern area 110 from reflecting ambient light. The ambient light of the non-marking pattern area 120 is absorbed by the light-absorbing layer 32. That is, neither the marking pattern area 110 nor the non-marking pattern area 120 can reflect ambient light, so as to avoid affecting the image transmitted. After the backlight BL passes through the second polarizer 42, it forms 90° linearly polarized light parallel to the transmission axis of the second polarizer 42. When it passes through the first liquid crystal layer 13, the 90° linearly polarized light becomes circularly polarized light or elliptically polarized light. Then, the 0° linearly polarized light parallel to the transmission axis of the first polarizer 41 can pass through the first polarizer 41, the 0° linearly polarized light and the marking pattern reflective layer 30 and the second liquid crystal layer 23, and after passing through the quarter-wave plate 44, the 0° linearly polarized light becomes circularly polarized light (e.g., right-handed). The 0° linearly polarized light parallel to the transmission axis of the third polarizer 43 can pass through the third polarizer 43, thereby realizing the display of the transmitted image.

[0065] Compared to Embodiment 1, this embodiment uses a label control liquid crystal cell 20 to control whether the label pattern reflective layer 30 reflects ambient light. This avoids the reflected ambient light affecting the transmissive display when the image is being transmitted, thus improving the display effect of the transmissive display.

[0066] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1 and Embodiment 2, and will not be repeated here.

[0067] [Example 4] Figure 20 This is a schematic diagram of the display device in its initial state according to Embodiment 4 of the present invention. Figure 20 As shown, the display device and control method provided in Embodiment 4 of the present invention are the same as those in Embodiment 1. Figures 1 to 10 Example 2 Figure 11 and Figure 12 Example 3 Figures 13 to 19 The display devices and control methods in the two are basically the same, the difference being: In this embodiment, the marking pattern reflective layer 30 includes an insulating layer 34 that is disposed on the entire surface. The insulating layer 34 has a plurality of raised structures 341 on the side facing the external environment. The plurality of raised structures 341 can enable the marking pattern reflective layer 30 to achieve a diffuse reflection effect, thereby improving the display effect of the marking pattern.

[0068] Those skilled in the art should understand that the remaining structures and working principles of this embodiment are the same as those of Embodiment 1, Embodiment 2, and Embodiment 3, and will not be repeated here.

[0069] In this document, the directional terms such as up, down, left, right, front, and back are defined according to the position of the structures in the accompanying drawings and the relative positions of the structures, and are only used for clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application. It should also be understood that the terms "first" and "second," etc., used herein are only used for distinction in name and are not used to limit the number or order.

[0070] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content without departing from the scope of the technical solution of the present invention, which are equivalent embodiments with equivalent changes. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention shall still fall within the protection scope of the technical solution of the present invention.

Claims

1. A display device, characterized by comprising: The display device comprises a display liquid crystal box (10), an identification pattern reflection layer (30) arranged on the light exit side of the display liquid crystal box (10), and a backlight module (50) arranged on the light entrance side of the display liquid crystal box (10); The display device has a patterned identification pattern area (110), the identification pattern reflection layer (30) has a patterned reflection area (F), the projection of the reflection area (F) on the display device and the identification pattern area (110) coincide with each other, the identification pattern reflection layer (30) comprises a reflective metal layer (31), the reflective metal layer (31) is a grid structure and has a plurality of first light transmission holes (311), and the reflective metal layer (31) is at least located in the reflection area (F). When the display identification pattern is reflected, the backlight module (50) is turned off, and the reflective metal layer (31) in the reflection area (F) reflects the corresponding identification pattern.

2. The display device according to claim 1, wherein The display device has a non-identification pattern area (120) except the area of the identification pattern area (110), the identification pattern reflection layer (30) has a patterned light absorption area (X), the projection of the light absorption area (X) on the display device and the non-identification pattern area (120) coincide with each other; The reflective metal layer (31) is a full-surface structure and covers the reflection area (F) and the light absorption area (X), the identification pattern reflection layer (30) comprises a light absorption layer (32) stacked on the side of the reflective metal layer (31) close to the external environment, the light absorption layer (32) is located in the light absorption area (X), the light absorption layer (32) is a grid structure and has a plurality of second light transmission holes (321), and the projection of the light absorption layer (32) on the display device and the reflective metal layer (31) in the light absorption area (X) coincide with each other.

3. The display device according to claim 1, wherein The display liquid crystal box (10) comprises a color film substrate (11), an array substrate (12) arranged opposite to the color film substrate (11), and a first liquid crystal layer (13) arranged between the color film substrate (11) and the array substrate (12); a first polaroid (41) is arranged on the color film substrate (11), a second polaroid (42) is arranged on the array substrate (12), the light transmission axis of the first polaroid (41) is perpendicular to the light transmission axis of the second polaroid (42), and the identification pattern reflection layer (30) is arranged between the color film substrate (11) and the first polaroid (41).

4. The display device according to claim 1, wherein The identification pattern reflection layer (30) comprises a transparent conductive layer (33), and the transparent conductive layer (33) is a full-surface structure and covers at least the reflective metal layer (31).

5. The display device according to claim 1, wherein The identification pattern reflection layer (30) comprises a full-surface insulating layer (34), and a plurality of protruding structures (341) are arranged on the side of the insulating layer (34) facing the external environment.

6. The display device according to claim 1-5, characterized in that, The display device comprises an identification control liquid crystal box (20) arranged on the light emitting side of the display liquid crystal box (10), the identification control liquid crystal box (20) comprises an upper substrate (21), a lower substrate (22) arranged opposite to the upper substrate (21), and a second liquid crystal layer (23) arranged between the upper substrate (21) and the lower substrate (22), the upper substrate (21) is provided with a first control electrode (211) on the side facing the second liquid crystal layer (23), and the lower substrate (22) is provided with a second control electrode (221) matched with the first control electrode (211) on the side facing the second liquid crystal layer (23); The identification pattern reflection layer (30) is arranged on the side of the second liquid crystal layer (23) facing the display liquid crystal box (10), the upper substrate (21) is provided with a third polaroid (43) and a quarter wave plate (44) arranged in layers, the quarter wave plate (44) is located between the upper substrate (21) and the third polaroid (43), and the fast and slow axes of the quarter wave plate (44) are at an angle of 45° with the light transmission axis of the third polaroid (43).

7. The display device according to claim 6, wherein The identification pattern reflection layer (30) is arranged on the side of the lower substrate (22) facing the second liquid crystal layer (23), and the second control electrode comprises at least the reflective metal layer (31).

8. The display device according to claim 6, wherein The second liquid crystal layer (23) adopts positive liquid crystal molecules, and the alignment direction of the side of the second liquid crystal layer (23) close to the upper substrate (21) is perpendicular to the alignment direction of the side of the second liquid crystal layer (23) close to the lower substrate (22).

9. A control method of a display device, characterized by, The control method for controlling the display device as claimed in any one of claims 1-8 comprises: When the identification pattern is displayed by reflection, the backlight module (50) is controlled to be turned off, and the corresponding identification pattern is displayed by the reflected light of the reflective metal layer (31) in the reflective area (F); When the picture is displayed by transmission, the backlight module (50) and the display liquid crystal box (10) are both controlled to be turned on, and the transmittance of the backlight is adjusted by the display liquid crystal box (10) to display the corresponding picture.

10. The control method of a display device according to claim 9, wherein The display device comprises an identification control liquid crystal box (20) arranged on the light emitting side of the display liquid crystal box (10), the identification pattern reflection layer (30) is arranged on the side of the second liquid crystal layer (23) facing the display liquid crystal box (10), the upper substrate (21) is provided with a third polaroid (43) and a quarter wave plate (44) arranged in layers, the quarter wave plate (44) is located between the upper substrate (21) and the third polaroid (43), and the fast and slow axes of the quarter wave plate (44) are at an angle of 45° with the light transmission axis of the third polaroid (43), and the control method comprises: When the identification pattern is displayed by reflection, the second liquid crystal layer (23) in the identification control liquid crystal box (20) is controlled to have a phase delay of λ / 4; when the picture is displayed by transmission, the second liquid crystal layer (23) in the identification control liquid crystal box (20) is controlled to be in a standing posture.

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