All-solid-state full-color electrochromic display structure and electronic paper

Abstract

The invention relates to the technical field of electronic paper, and discloses an all-solid-state full-color electrochromic display structure and electronic paper. The display structure comprises a substrate layer, a white reflecting layer arranged on the substrate layer and a display layer arranged on the side, away from the substrate layer, of the white reflecting layer. The display layer includes a neutral color electrochromic layer and a color filter layer. The neutral color system electrochromism layer is combined with the color filter layer, the neutral color system electrochromism layer is used for adjusting the light transmittance, the color filter layer is matched to achieve filtering of three primary colors, and therefore the rich color display effect can be achieved.

Description

Technical Field

[0001] This application relates to the field of electronic paper technology, and more specifically, to an all-solid-state full-color electrochromic display structure and electronic paper. Background Technology

[0002] Electronic paper technology is a novel display technology that provides a similar display effect to paper printing, focusing on mimicking the visual experience of printing and writing on paper. Electronic paper is a reflective display, relying on ambient light for illumination, just like ordinary paper. It is relatively comfortable to read, and the displayed image remains clearly visible even in direct sunlight, offering an extremely wide viewing angle. Currently, the mainstream display technologies for electronic paper include: electrophoretic display (EPD), cholesteric liquid crystal display (Ch-LCD), and bistable nematic liquid crystal display (Bi-TNLCD). At present, mainstream electronic paper on the market uses electrophoretic display technology, which is widely used in retail store price tags, e-book readers, and other applications. Electrophoretic display technology involves injecting liquid containing positively and negatively charged color particles into microcapsules. Under an applied external electric field, the color particles move along the direction of the electric field to the top or bottom of the capsule, displaying the desired color. Microcapsule electrophoresis technology relies on the reflection of ambient light by colored particles, making it relatively easy to achieve black and white display, but extremely difficult to achieve full color. Because color control requires the physical movement of particles, the refresh rate is slow, and the required voltage is high. Microcapsules contain liquid and have a narrow operating temperature range, typically 0~50°C.

[0003] Electrochromism (EC) technology works by using an applied voltage to cause ions in the electrolyte layer to enter or leave the electrochromic material, resulting in oxidation or reduction reactions that cause the electrochromic device to switch between a transparent and dark state. Electrochromic devices are characterized by being all-solid-state, operating at low voltage, multi-stable states, zero static power consumption, low power consumption during color change, continuously adjustable transmittance / reflectance, long lifespan, fast response time, and low cost. Electronic paper displays based on electrochromic technology can be widely used in numerous fields such as consumer electronics, retail, logistics, education, healthcare, and military applications.

[0004] EC devices consist of two transparent electrodes sandwiching three layers of material, with interfaces between them. Spatially, these layers are, in order, a charge storage layer, an electrolyte layer, and an electrochromic layer. Depending on the material of the electrochromic layer, EC devices can display colors such as red, green, blue, and neutral colors (gray).

[0005] However, traditional electrochromic devices are mostly used in dimming glass, exhibiting a single color of brightness variation, making them difficult to directly apply to the field of electronic paper, which requires high resolution and full-color display. Therefore, how to construct a high-performance all-solid-state full-color electrochromic electronic paper is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to solve the technical problem that electrochromic electronic paper in the prior art is difficult to achieve full-color display, and to provide an all-solid-state full-color electrochromic display structure and electronic paper to overcome the limitations of traditional electrochromic devices in color display applications.

[0007] To achieve the above-mentioned objectives, this application adopts the following technical solution:

[0008] In a first aspect, this application provides an all-solid-state full-color electrochromic display structure, including...

[0009] basal layer; A white reflective layer is disposed on the substrate layer; The display layer is disposed on the side of the white reflective layer that faces away from the substrate layer; The display layer includes a neutral color electrochromic layer and a color filter layer.

[0010] Furthermore, the color filter layer is disposed on the side of the neutral color electrochromic layer near the substrate layer.

[0011] Furthermore, the color filter layer is disposed on the side of the neutral color electrochromic layer opposite to the substrate layer.

[0012] Furthermore, the color filter layer includes at least three filters corresponding to red, green, and blue sub-pixels, respectively.

[0013] Furthermore, the color filter layer can be any one of an absorption filter, a phosphorescent filter, and a quantum dot filter.

[0014] Furthermore, the substrate layer is a thin-film transistor substrate layer.

[0015] Furthermore, the neutral color electrochromic layer includes a first transparent electrode, an electrochromic functional layer, an electrolyte layer, an ion storage layer, and a second transparent electrode, which are stacked sequentially.

[0016] Secondly, this application provides another display method for the aforementioned all-solid-state full-color electrochromic display structure, including: By applying voltage to the neutral color electrochromic layer corresponding to the target sub-pixel through the base layer, the light transmittance can be controlled to switch between transparent and colored states. Ambient light is dimmed by the neutral color electrochromic layer and reflected by the white reflective layer. The reflected light is filtered by the color filter layer and then passes through the neutral color electrochromic layer again before being emitted to complete the display.

[0017] Thirdly, this application provides a display method for the aforementioned all-solid-state full-color electrochromic display structure, including: By applying voltage to the neutral color electrochromic layer corresponding to the target sub-pixel through the base layer, the light transmittance can be controlled to switch between transparent and colored states. Ambient light is dimmed by the neutral color electrochromic layer and reflected by the white reflective layer. The reflected light passes through the neutral color electrochromic layer again and is emitted after being filtered by the color filter layer, thus completing the display.

[0018] Fourthly, this application provides an all-solid-state, full-color electrochromic electronic paper, including the aforementioned all-solid-state, full-color electrochromic display structure.

[0019] In summary, this application has the following beneficial effects: This application combines a neutral color electrochromic layer with a color filter layer. The neutral color electrochromic layer adjusts the light transmittance, and the color filter layer filters the three primary colors, thereby presenting a rich color display effect.

[0020] The all-solid-state full-color electrochromic display structure of this application allows the neutral color electrochromic layer to switch between a transparent state and a colored state and to continuously adjust the light transmittance under the voltage control of the substrate layer. When in the transparent state, ambient light can pass through and be reflected by the white reflective layer, and then filtered by the color filter layer to form a specific color. When in the colored state or in different light transmittance states, the brightness of the color can be controlled by adjusting the amount of light transmitted, thereby achieving full-color display.

[0021] Furthermore, the structure of this application adopts an all-solid-state design, which avoids the operating temperature limitations caused by liquid components in traditional electrophoretic display technology, and has a wider operating temperature range, resulting in higher device stability and a longer service life. Attached Figure Description

[0022] Figure 1 : A schematic diagram of the all-solid-state full-color electrochromic display structure in Embodiment 1 of this application; Figure 2 : A schematic diagram of the all-solid-state full-color electrochromic display structure in Embodiment 2 of this application; Figure 3 : A schematic diagram illustrating the working principle of the all-solid-state full-color electrochromic display structure in this application embodiment; Figure 4 : A schematic diagram of the structure of the neutral color electrochromic layer in the embodiments of this application.

[0023] Figure descriptions: 1. Base layer; 2. White reflective layer; 3. Neutral color electrochromic layer; 301. First transparent electrode; 302. Electrochromic functional layer; 303. Electrolyte layer; 304. Ion storage layer; 305. Second transparent electrode; 4. Color filter layer; 401. Filter. Detailed Implementation

[0024] In existing technologies, electrochromic electronic paper faces numerous challenges in achieving full-color display. Traditional electrochromic devices mostly exhibit single-color brightness variations, making it difficult to meet the demands of high-resolution, full-color displays. To address this issue, this application proposes an all-solid-state full-color electrochromic display structure that combines a neutral-color electrochromic layer with a color filter layer, thus solving this technical problem.

[0025] The neutral color electrochromic layer in the all-solid-state full-color electrochromic display structure of this application can adjust the conversion between transparent and colored states and regulate light transmittance through voltage control, while the color filter layer can filter the three primary colors. The two work synergistically to achieve the technical effect of color display. Furthermore, the all-solid-state design of this application not only avoids the limitation of operating temperature imposed by liquid components in traditional electrophoretic display technology, but also significantly improves the stability and lifespan of the device, laying the foundation for the widespread application of electrochromic technology in the field of electronic paper.

[0026] The technical solutions and effects of this application will be further described in detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the invention, not the entire structure.

[0027] Example 1: All-solid-state full-color electrochromic display structure This embodiment discloses an all-solid-state full-color electrochromic display structure, referring to... Figure 1 , Figure 3 and Figure 4The display structure includes a substrate layer 1, a white reflective layer 2, and a display layer. The white reflective layer 2 is disposed on the substrate layer 1, and the display layer is disposed on the side of the white reflective layer 2 facing away from the substrate layer 1. The display layer consists of a neutral color electrochromic layer 3 and a color filter layer 4. In this embodiment, the color filter layer 4 is disposed on the side of the neutral color electrochromic layer 3 closest to the substrate layer 1. The substrate layer 1 is a thin film transistor (TFT) substrate layer, which can realize the driving control of each sub-pixel. The neutral color electrochromic layer 3 consists of a first transparent electrode 301, an electrochromic functional layer 302, an electrolyte layer 303, an ion storage layer 304, and a second transparent electrode 305 stacked sequentially. The color filter layer 4 includes at least three types of filters 401 corresponding to red, green, and blue sub-pixels, respectively. The filters 401 can be any one of absorption filters, phosphorescent filters, or quantum dot filters to meet different display requirements and performance requirements.

[0028] Example 2: All-solid-state full-color electrochromic display structure This embodiment discloses an all-solid-state full-color electrochromic display structure, referring to... Figure 2 , Figure 3 and Figure 4 The difference between this display structure and Embodiment 1 lies in the placement of the color filter layer 4. In this embodiment, the color filter layer 4 is disposed on the side of the neutral color electrochromic layer 3 facing away from the substrate layer 1. The substrate layer 1 is also a thin-film transistor substrate layer. The structure of the neutral color electrochromic layer 3 is consistent with that of Embodiment 1, including a first transparent electrode 301, an electrochromic functional layer 302, an electrolyte layer 303, an ion storage layer 304, and a second transparent electrode 305 stacked sequentially. The color filter layer 4 includes three types of filters 401 corresponding to red, green, and blue sub-pixels. The filters 401 can be any one of absorption filters, phosphorescent filters, or quantum dot filters to meet different display requirements and performance specifications.

[0029] Example 3: Display method of all-solid-state full-color electrochromic display structure This embodiment discloses the display method of the display structure in Embodiment 1, including: A specific voltage is applied to the neutral color electrochromic layer corresponding to the target sub-pixel through the base layer. This voltage drives the electrochromic functional layer in the neutral color electrochromic layer to undergo oxidation or reduction reactions, thereby controlling its switching between transparent and colored states, or adjusting its light transmittance. When ambient light shines on the display structure, it first passes through the neutral color electrochromic layer. At this time, the neutral color electrochromic layer presents a corresponding light-transmitting state according to the applied voltage. The dimmed ambient light reaches the white reflective layer and is reflected. The reflected light propagates upward, passing through the color filter layer and the neutral color electrochromic layer in sequence. The color filter layer filters the reflected light with a specific color, allowing only the light of the corresponding sub-pixel color to pass through. Finally, after being dimmed again by the neutral color electrochromic layer, it is emitted, forming a stable and clear color display effect on the surface of the display structure.

[0030] Example 4: Display method of all-solid-state full-color electrochromic display structure This embodiment discloses the display method of the display structure in Embodiment 2, including: A specific voltage is applied to the neutral color electrochromic layer corresponding to the target sub-pixel through the substrate layer. This voltage drives the electrochromic functional layer in the neutral color electrochromic layer to undergo oxidation or reduction reactions, thereby controlling its switching between transparent and colored states, or adjusting its light transmittance. When ambient light shines on the display structure, it first passes through the neutral color electrochromic layer. At this time, the neutral color electrochromic layer presents a corresponding light-transmitting state according to the applied voltage. The dimmed ambient light reaches the white reflective layer and is reflected. The reflected light propagates upwards through the color filter layer of the neutral color electrochromic layer. The color filter layer filters the reflected light with a specific color, allowing only the light of the corresponding sub-pixel color to pass through, ultimately forming a stable and clear color display effect on the surface of the display structure.

[0031] The beneficial effects of this invention are that it combines a neutral color electrochromic layer with a color filter layer, successfully solving the technical difficulties of traditional electrochromic devices in the field of color display. Under voltage control of the substrate layer, the neutral color electrochromic layer can achieve rapid switching between transparent and tinted states, while supporting continuous adjustment of transmittance, providing a basis for regulating the brightness changes in color display. The color filter layer selectively filters ambient light through its red, green, and blue primary color filters, ensuring that light of specific colors can effectively pass through. When ambient light shines on the display structure, after being dimmed by the neutral color electrochromic layer, it is efficiently reflected by the white reflective layer. The reflected light then passes through the color filter layer and undergoes secondary dimming by the neutral color electrochromic layer, ultimately forming a rich and stable full-color display effect.

[0032] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A fully solid-state, full-color electrochromic display structure, characterized in that, include. basal layer; A white reflective layer is disposed on the substrate layer; The display layer is disposed on the side of the white reflective layer that faces away from the substrate layer; The display layer includes a neutral color electrochromic layer and a color filter layer.

2. The all-solid-state full-color electrochromic display structure according to claim 1, characterized in that, The color filter layer is disposed on the side of the neutral color electrochromic layer near the substrate layer.

3. The all-solid-state full-color electrochromic display structure according to claim 1, characterized in that, The color filter layer is disposed on the side of the neutral color electrochromic layer away from the substrate layer.

4. The all-solid-state full-color electrochromic display structure according to claim 2 or 3, characterized in that, The color filter layer includes at least three filters corresponding to red, green and blue sub-pixels, respectively.

5. The all-solid-state full-color electrochromic display structure according to claim 4, characterized in that, The color filter layer can be any one of an absorption filter, a phosphorescent filter, or a quantum dot filter.

6. The all-solid-state full-color electrochromic display structure according to claim 2 or 3, characterized in that, The substrate layer is a thin-film transistor substrate layer.

7. The all-solid-state full-color electrochromic display structure according to claim 2 or 3, characterized in that, The neutral color electrochromic layer includes a first transparent electrode, an electrochromic functional layer, an electrolyte layer, an ion storage layer, and a second transparent electrode, which are stacked sequentially.

8. A display method for the all-solid-state full-color electrochromic display structure as described in claim 2, characterized in that, include: By applying voltage to the neutral color electrochromic layer corresponding to the target sub-pixel through the base layer, the light transmittance can be controlled to switch between transparent and colored states. Ambient light is dimmed by the neutral color electrochromic layer and reflected by the white reflective layer. The reflected light is filtered by the color filter layer and then passes through the neutral color electrochromic layer again before being emitted to complete the display.

9. A display method for the all-solid-state full-color electrochromic display structure as described in claim 3, characterized in that, include: By applying voltage to the neutral color electrochromic layer corresponding to the target sub-pixel through the base layer, the light transmittance can be controlled to switch between transparent and colored states. Ambient light is dimmed by the neutral color electrochromic layer and reflected by the white reflective layer. The reflected light passes through the neutral color electrochromic layer again and is emitted after being filtered by the color filter layer, thus completing the display.

10. A fully solid-state, full-color electrochromic electronic paper, characterized in that, Includes the all-solid-state full-color electrochromic display structure as described in any one of claims 1-7.

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