Display device

Abstract

The invention provides a display device which comprises a first substrate, a second substrate and a plurality of display units, and at least one of the display units comprises a first structure and a second structure. The first structure includes a light-emitting element and a first pattern layer. The second structure comprises a second pattern layer and a third pattern layer. The light-emitting element is disposed on the first region of the first substrate. The first pattern layer is disposed on the second region of the first substrate. The second pattern layer is disposed on the third region of the second substrate. The third pattern layer is disposed on the fourth region of the second substrate. The first area corresponds to the third area, and the second area corresponds to the fourth area. The second pattern layer is a light modulation layer and is controlled by the first electrode layer, and the third pattern layer is a light modulation layer and is controlled by the second electrode layer. The first electrode layer and the second electrode layer are not connected.

Description

Technical Field

[0001] The present invention relates to an optical device, and in particular to a display device. Background Art

[0002] In a display device with a decorative pattern, the decorative pattern layer is usually arranged above or below the image display layer. When the decorative pattern layer is located above the image display layer, it may block the displayed image, reduce the current efficiency of the light-emitting element and the contrast of the displayed image. When the decorative pattern layer is located below the image display layer, the reflection of ambient light may be high, reducing the optical performance. Summary of the invention

[0003] The present invention provides a display device with high current efficiency and capable of providing optimized optical performance according to requirements.

[0004] According to one embodiment of the present invention, a display device is provided, comprising a first substrate, a second substrate and a plurality of display units, at least one of the display units comprising a first structure and a second structure. The first structure comprises a light-emitting element and a first pattern layer. The second structure comprises a second pattern layer and a third pattern layer. The light-emitting element is arranged on a first area of ​​the first substrate. The first pattern layer is arranged on a second area of ​​the first substrate. The second pattern layer is arranged on a third area of ​​the second substrate. The third pattern layer is arranged on a fourth area of ​​the second substrate. The first area corresponds to the third area, and the second area corresponds to the fourth area. The second pattern layer is a light modulation layer and is controlled by the first electrode layer, and the third pattern layer is a light modulation layer and is controlled by the second electrode layer. The first electrode layer and the second electrode layer are not connected.

[0005] Based on the above, the display device provided by the embodiment of the present invention is configured with a pattern layer on a part of the upper substrate area above the light-emitting element, and this pattern layer and the pattern layers in other areas of the upper substrate can be independently controlled. When the light-emitting element emits light, the pattern layer above it can be presented in a penetrating state to improve the current efficiency of the light-emitting element. In addition, each pattern layer in the display device can present a variety of states, so it can provide optimized optical performance according to needs.

[0006] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 A schematic diagram showing a display device according to a first embodiment of the present invention.

[0008] Figure 2 A schematic diagram showing a display device according to a second embodiment of the present invention.

[0009] Figure 3 A schematic diagram showing a display device according to a third embodiment of the present invention.

[0010] Wherein, the reference numerals are:

[0011] 1: First structure

[0012] 2: Second structure

[0013] 10: First substrate

[0014] 11, 12, 21, 22: Area

[0015] 20: Second substrate

[0016] 100: Light emitting element

[0017] 101: First pattern layer

[0018] 102, 202: second pattern layer

[0019] 103, 203: third pattern layer

[0020] 100C: Transparent insulation layer

[0021] 1000, 2000, 3000: Display device

[0022] DU: Display Unit

[0023] E0: Common electrode

[0024] E1, E2: Electrode DETAILED DESCRIPTION

[0025] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0026] Reference Figure 1 , which shows a schematic diagram of a display device according to a first embodiment of the present invention.

[0027] The display device 1000 includes a first substrate 10, a second substrate 20, and a plurality of display units DU, each display unit DU including a first structure 1 and a second structure 2. The first structure 1 includes a light emitting element 100 and a first pattern layer 101. The second structure 2 includes a second pattern layer 102 and a third pattern layer 103. The light emitting element 100 may be, for example, a light emitting diode, and is disposed on the region 11 of the first substrate 10. The first pattern layer 101 is disposed on the region 12 of the first substrate 10. The second pattern layer 102 is disposed on the region 21 of the second substrate 20, and the third pattern layer 103 is disposed on the region 22 of the second substrate 20. The region 11 corresponds to the region 21, and the region 12 corresponds to the region 22. Specifically, the vertical projection of the region 11 on the second substrate 20 overlaps the vertical projection of the region 21 on the second substrate 20, and the vertical projection of the region 12 on the second substrate 20 overlaps the vertical projection of the region 22 on the second substrate 20. In the first embodiment, the region 11 faces the region 21, and the region 12 faces the region 22, but the present invention is not limited thereto. In some embodiments, the light emitting element 100 and the first pattern layer 101 may be disposed on a side of the first substrate 10 away from the second substrate 20 .

[0028] The second pattern layer 102 and the third pattern layer 103 are used to modulate light. In some embodiments, the second pattern layer 102 and the third pattern layer 103 may include electrochromic materials to modulate the color of light. By applying an electric field to the second pattern layer 102 through the transparent electrode E1 and the transparent common electrode E0, and applying an electric field to the third pattern layer 103 through the transparent electrode E2 and the transparent common electrode E0, the second pattern layer 102 and the third pattern layer 103 can undergo stable and reversible color changes and transparency changes. In the first embodiment, the second pattern layer 102 and the third pattern layer 103 can provide a light transmission state, a light absorption state, and a light reflection state. It should be noted that the electrode E1 is not connected to the electrode E2, so the second pattern layer 102 and the third pattern layer 103 can be independently controlled. That is, the second pattern layer 102 and the third pattern layer 103 can be the same state or different states among the light transmission state, the light absorption state, or the light reflection state.

[0029] In some embodiments, the first pattern layer 101 may include a photochromic material to change color by ambient light or light from the light emitting element 100, but the present invention is not limited thereto. In some embodiments, a light emitting layer may be disposed between the first substrate 10 and the first pattern layer 101 to change the color of the first pattern layer 101. For example, a light guide plate is disposed between the first substrate 10 and the first pattern layer 101, and a light source (such as a light emitting diode) is disposed on the side of the light guide plate. The light emitted by the light emitting diode is guided to the first pattern layer 101 by the light guide plate to control the color of the first pattern layer 101.

[0030] In some embodiments, the first pattern layer 101 may include a thermochromic material to change the color of the first pattern layer 101 by changing the temperature. In some embodiments, a heating layer may be disposed between the first substrate 10 and the first pattern layer 101 to change the color of the first pattern layer 101. The heating layer may include, for example, a plurality of heating lines.

[0031] The first pattern layer 101 may be, for example, ink, and may be transparent, black, or colored according to brightness or temperature.

[0032] In the first embodiment, since the vertical projection of region 11 on the second substrate 20 overlaps the vertical projection of region 21 on the second substrate 20, when the light-emitting element 100 emits light, the second pattern layer 102 above it can be configured to be a light-transmitting state to allow the light emitted by the light-emitting element 100 to penetrate the second pattern layer 102 and the second substrate 20, thereby providing current efficiency for the light-emitting element 100.

[0033] In some embodiments, the second pattern layer 102 is in a light-transmitting state and the light-emitting element 100 emits light, and the third pattern layer 103 is in a light-transmitting state, and the display device 1000 displays the light of the light-emitting element 100 (i.e., the display information provided by the light-emitting element 100), and presents different optical performances according to the state of the first pattern layer 101. For example, in one embodiment, the first pattern layer 101 is transparent, and the display device 1000 only displays the display information provided by the light-emitting element 100. In one embodiment, the first pattern layer 101 is a black pattern, and the display device 1000 can reduce the reflection of ambient light due to the black first pattern layer 101 in addition to displaying the display information provided by the light-emitting element 100. In one embodiment, the first pattern layer 101 is a color pattern, and the display device 1000 can display the color pattern of the first pattern layer 101 in addition to displaying the display information provided by the light-emitting element 100.

[0034] In some embodiments, the second pattern layer 102 is in a light-transmitting state and the light-emitting element 100 emits light, the third pattern layer 103 is in a light-absorbing state and appears black, and the first pattern layer 101 is a black pattern. In this embodiment, the display device 1000 displays the display information provided by the light-emitting element 100 and reduces the reflection of ambient light.

[0035] In some embodiments, the light-emitting element 100 does not emit light, and the second pattern layer 102 is in a light-absorbing state or a light-reflecting state to prevent the light-emitting element 100 from being visible. In these embodiments, the display device 1000 presents different optical performances according to the states of the first pattern layer 101 and the third pattern layer 103. For example, in some embodiments, the third pattern layer 103 is in a light-transmitting state, and the display device 1000 presents different optical performances according to the state of the first pattern layer 101, such as displaying a black pattern or a color pattern, or when the first pattern layer 101 is transparent, the display device 1000 appears as a transparent device.

[0036] In some embodiments, the light emitting element 100 does not emit light, and the second pattern layer 102 is in a light absorbing state or a light reflecting state to prevent the light emitting element 100 from being visible. In these embodiments, the display device 1000 presents different optical performances according to the states of the first pattern layer 101 and the third pattern layer 103. For example, in some embodiments, the third pattern layer 103 is in a light absorbing state, and the display device 1000 displays a black pattern of the third pattern layer 103.

[0037] In some embodiments, the light emitting element 100 does not emit light, and the second pattern layer 102 is in a light reflective state to prevent the light emitting element 100 from being visible. In addition, the third pattern layer 103 is also in a light reflective state, and the display device 1000 is formed as a mirror reflection device.

[0038] In order to fully illustrate the various embodiments of the present invention, other embodiments of the present invention will be described below. It must be noted that the following embodiments use the component numbers and some contents of the previous embodiments, wherein the same numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. For the description of the omitted parts, please refer to the previous embodiments, and the following embodiments will not be repeated.

[0039] Reference Figure 2 , which shows a schematic diagram of a display device according to a second embodiment of the present invention.

[0040] The display device 2000 includes a first substrate 10, a second substrate 20 and a plurality of display units DU, each display unit DU including a first structure 1 and a second structure 2. The first structure 1 includes a light emitting element 100 and a first pattern layer 101. The second structure 2 includes a second pattern layer 202 and a third pattern layer 203, wherein the second pattern layer 202 and the third pattern layer 203 include cholesterol liquid crystal molecules. An electric field can be applied to the cholesterol liquid crystal molecules in the second pattern layer 202 by means of an electrode E1 and a common electrode E0, and an electric field can be applied to the cholesterol liquid crystal molecules in the third pattern layer 203 by means of an electrode E2 and a common electrode E0. Driven by the electric field, the cholesterol liquid crystal molecules can switch to two stable states, namely, a reflective state (planar state) or a transmissive state (focal-conic state). In the reflective state, the cholesterol liquid crystal molecules reflect light of a specific wavelength, so they appear bright; in the transmissive state, they allow light to pass through. In the second embodiment, the second pattern layer 202 and the third pattern layer 203 of a display unit DU can reflect red light, green light or blue light in the reflective state, and the color of the pattern layer in the reflective state can be determined by adjusting the thickness of the cholesterol liquid crystal layer. Specifically, a transparent filling layer OC can be configured in different display units DU of the display device 2000, and the transparent filling layer OC has different thicknesses in different display units DU, thereby changing the thickness of the cholesterol liquid crystal layer to determine the color of the display unit DU in the reflective state.

[0041] In the second embodiment, the electrode E1 is not connected to the electrode E2, so the cholesterol liquid crystal molecules in the second pattern layer 202 and the cholesterol liquid crystal molecules in the third pattern layer 203 can be independently controlled. In other words, the second pattern layer 202 and the third pattern layer 203 can be in the same state or different states of the reflection state or the transmission state.

[0042] The light emitting element 100 may be, for example, a light emitting diode, and is disposed on the region 11 of the first substrate 10 and covered by the transparent insulating layer 100C. The first pattern layer 101 is disposed on the region 12 of the first substrate 10. The second pattern layer 202 is disposed on the region 21 of the second substrate 20, and the third pattern layer 203 is disposed on the region 22 of the second substrate 20. The region 11 corresponds to the region 21, and the region 12 corresponds to the region 22. The vertical projection of the region 11 on the second substrate 20 overlaps the vertical projection of the region 21 on the second substrate 20, and the vertical projection of the region 12 on the second substrate 20 overlaps the vertical projection of the region 22 on the second substrate 20. In the second embodiment, the region 11 faces the region 21, and the region 12 faces the region 22.

[0043] In some embodiments, the first pattern layer 101 may include a photochromic material to change color by ambient light or light from the light emitting element 100, but the present invention is not limited thereto. In some embodiments, a light emitting layer may be disposed between the first substrate 10 and the first pattern layer 101 to change the color of the first pattern layer 101.

[0044] In some embodiments, the first pattern layer 101 may include a thermochromic material to change the color of the first pattern layer 101 by changing the temperature. In some embodiments, a heating layer may be disposed between the first substrate 10 and the first pattern layer 101 to change the color of the first pattern layer 101.

[0045] The first pattern layer 101 may be, for example, ink, and may be transparent, black, or colored according to brightness or temperature.

[0046] In this second embodiment, since the vertical projection of region 11 on the second substrate 20 overlaps the vertical projection of region 21 on the second substrate 20, when the light-emitting element 100 emits light, the second pattern layer 202 above it can be configured to be in a penetrating state to allow the light emitted by the light-emitting element 100 to penetrate the second pattern layer 202 and the second substrate 20.

[0047] In some embodiments, the second pattern layer 202 is in a transmissive state and the light-emitting element 100 emits light, and the third pattern layer 203 is in a transmissive state, and the display device 2000 displays the light of the light-emitting element 100 (i.e., the display information provided by the light-emitting element 100), and presents different optical performances according to the state of the first pattern layer 101. For example, in one embodiment, the first pattern layer 101 is transparent, and the display device 2000 only displays the display information provided by the light-emitting element 100. In one embodiment, the first pattern layer 101 is a black pattern, and the display device 2000 can reduce the reflection of ambient light due to the black first pattern layer 101 in addition to displaying the display information provided by the light-emitting element 100. In one embodiment, the first pattern layer 101 is a color pattern, and the display device 2000 can display the color pattern of the first pattern layer 101 in addition to displaying the display information provided by the light-emitting element 100.

[0048] In some embodiments, the light-emitting element 100 does not emit light, and the second pattern layer 202 is in a reflective state to prevent the light-emitting element 100 from being visible. In these embodiments, the display device 2000 presents different optical performances according to the states of the first pattern layer 101 and the third pattern layer 203. For example, in some embodiments, the third pattern layer 203 is in a transmissive state, and the display device 2000 presents different optical performances according to the state of the first pattern layer 101, such as displaying a black pattern or a color pattern, or when the first pattern layer 101 is transparent, the display device 2000 appears as a transparent device.

[0049] In some embodiments, the light emitting element 100 does not emit light, and the second pattern layer 202 is in a reflective state to prevent the light emitting element 100 from being visible. In addition, the third pattern layer 203 is also in a reflective state, and the display device 2000 displays the patterns of the second pattern layer 202 and the third pattern layer 203 .

[0050] Reference Figure 3 , which shows a schematic diagram of a display device according to a third embodiment of the present invention.

[0051] The display device 3000 of the third embodiment is different from the aforementioned display device 2000 in that the light emitting element 100 and the first pattern layer 101 are disposed on a side of the first substrate 10 away from the second substrate 20, and the light emitted by the light emitting element 100 can be as follows: Figure 3 As shown, the first substrate 10 is first penetrated and then the second pattern layer 202 and the third pattern layer 203 are penetrated. In addition, since the first substrate 10, the second substrate 20, the common electrode E0, the electrode E1 and the electrode E2 are transparent, the first pattern layer 101 is visible from above the display device 3000. Therefore, the optical performance of the display device 3000 in various implementation modes of the third embodiment is similar to that of the display device 2000, and will not be repeated here.

[0052] In summary, the display device provided by the embodiment of the present invention is configured with a pattern layer on a portion of the upper substrate area above the light-emitting element, and this pattern layer and the pattern layers in other areas of the upper substrate can be independently controlled. When the light-emitting element emits light, the pattern layer above it can be presented in a penetrating state to improve the current efficiency of the light-emitting element. In addition, each pattern layer in the display device can present a variety of states, so it can provide optimized optical performance according to needs.

[0053] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A display device, characterized in that: The invention comprises a first substrate, a second substrate and a plurality of display units, wherein at least one of the plurality of display units comprises: The first structure includes: a light emitting element, disposed on the first region of the first substrate; and A first pattern layer is disposed on the second region of the first substrate; and The second structure includes: A second pattern layer is disposed on a third region of the second substrate; and a third pattern layer, disposed on a fourth region of the second substrate, The first area corresponds to the third area, the second area corresponds to the fourth area, the second pattern layer is a light modulation layer and is controlled by the first electrode layer, the third pattern layer is a light modulation layer and is controlled by the second electrode layer, and the first electrode layer and the second electrode layer are not connected.

2. The display device according to claim 1, wherein: The second pattern layer and the third pattern layer include electrochromic materials.

3. The display device according to claim 2, wherein: The electrochromic material is suitable for providing a transmitting state, a light absorbing state and a reflecting state.

4. The display device according to claim 3, characterized in that When the electrochromic material is in the reflective state, the display device is formed as a mirror reflective device.

5. The display device according to claim 1, wherein: The second pattern layer and the third pattern layer include cholesterol liquid crystal molecules.

6. The display device according to claim 5, characterized in that The second pattern layer and the third pattern layer are suitable for providing a transmission state and a reflection state.

7. The display device according to claim 1, wherein: The first pattern layer includes a photochromic material.

8. The display device according to claim 7, characterized in that It also includes a light source layer, which is arranged between the first substrate and the first pattern layer.

9. The display device according to claim 1, wherein: The first pattern layer includes a thermochromic material.

10. The display device according to claim 9, characterized in that It also includes a heating layer, which is arranged between the first substrate and the first pattern layer.

11. The display device according to claim 10, wherein: The heating layer comprises at least one heating wire.

12. The display device according to claim 1, wherein: The vertical projection of the first region on the second substrate overlaps the vertical projection of the third region on the second substrate, and the vertical projection of the second region on the second substrate overlaps the vertical projection of the fourth region on the second substrate.

13. The display device according to claim 12, wherein: The first area faces the third area, and the second area faces the fourth area.

14. The display device according to claim 12, wherein: The first region and the second region are located on a side of the first substrate away from the second substrate.

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