Enhanced reflective LCD

Abstract

To provide a low-energy display device for a watch or a smart watch, preferably of a watch or a smart watch.SOLUTION: The present invention relates to a watch (200) or a smart watch (200) having a low power consuming, bright, and enhanced low-energy display (100) by using a low energy display (100) configured to display at least one piece of information and to convert at least one primary light (410) into at least one secondary light (420).SELECTED DRAWING: Figure 1A

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal display devices, and more particularly to the field of enhanced reflective liquid crystal display devices. More specifically, the present invention relates to low-energy display devices.

Background Art

[0002] In this specification, liquid crystal display devices, hereinafter referred to as LCDs, are widely used in watches because of their good contrast and low energy consumption. However, the reflectivity of LCDs lacks aesthetic quality in some products. For example, monochrome display devices with red are too dark.

Summary of the Invention

Means for Solving the Problems

[0003] The present invention is a low-energy display device for a watch or a smartwatch, configured to display at least one piece of information and receive at least one primary light, preferably, - at least one wavelength conversion member configured to completely or partially convert the at least one primary light into at least one secondary light by absorbing the at least one primary light and emitting at least one secondary light; - at least one optical switch configured to completely or partially block or transmit the at least one primary light and / or the at least one secondary light; - at least one reflective element configured to completely or partially reflect and / or scatter the at least one secondary light and the at least one primary light relates to a low-energy display device comprising.

[0004] Thanks to this configuration, the low-energy display device converts the at least one primary light into the at least one secondary light.

[0005] According to one embodiment, the at least one wavelength conversion member is made from at least one quantum dot, a phosphorescent material, or a fluorescent material, and / or at least one quantum rod.

[0006] Thanks to this configuration, the quantum dot and / or the quantum rod convert the at least one primary light into the at least one secondary light.

[0007] According to one embodiment, the at least one quantum rod is configured to align with a polarization-sensitive optical switch.

[0008] Thanks to this configuration, the transmittance of the at least one secondary light emitted by the at least one quantum rod is maximized.

[0009] According to one embodiment, the at least one indicator light switch comprises a liquid crystal display device or a thin-film transistor liquid crystal display device.

[0010] Thanks to this configuration, the low-energy display device displays at least one piece of information.

[0011] According to one embodiment, the at least one reflective element comprises a reflective surface, preferably a metallic reflective surface and / or a dielectric reflective surface, or a reflective polarizer, preferably a multi-interference layer and / or a wire grid type.

[0012] Thanks to this configuration, the low-energy display device can reflect or diffuse the at least one primary light and / or the at least one secondary light.

[0013] According to one embodiment, the at least one primary light comprises at least one first primary wavelength, at least one second primary wavelength, at least one first primary polarization, and / or at least one second primary polarization, and / or the at least one secondary light comprises at least one first secondary wavelength, at least one second secondary wavelength, at least one first secondary polarization, and / or at least one second secondary polarization.

[0014] According to one embodiment, the low-energy display device comprises at least one first optical filter comprising at least one first color filter configured to transmit at least one first primary wavelength, at least one first secondary wavelength, and / or at least one second secondary wavelength, and / or preferably block at least one second primary wavelength.

[0015] According to one embodiment, the at least one first optical filter comprises at least one first polarizer configured to completely or partially transmit the at least one first primary polarization, the at least one first secondary polarization, and / or the at least one second secondary polarization, and / or preferably block the at least one second primary polarization.

[0016] According to one embodiment, the at least one optical switch comprises the at least one first optical filter and / or the at least one second optical filter, wherein the at least one first optical filter and / or the at least one second optical filter comprises a dichroic dye.

[0017] Thanks to one of these configurations, the at least one first optical filter completely or partially transmits the at least one primary light and / or the at least one secondary light, or preferably partially blocks the at least one primary light.

[0018] According to one embodiment, the low-energy display device comprises at least one second optical filter having at least one second color filter configured to transmit all or partially the at least one first primary wavelength, the at least one first secondary wavelength, and / or the at least one second secondary wavelength.

[0019] According to one embodiment, the at least one second optical filter comprises at least one second polarizer configured to transmit all or part of the at least one first primary polarization, the at least one first secondary polarization, and / or the at least one second secondary polarization.

[0020] Thanks to one of these configurations, the at least one second optical filter completely or partially transmits the at least one primary light and / or the at least one secondary light, or preferably partially blocks the at least one primary light.

[0021] According to one embodiment, the at least one display device is located between the at least one first optical filter, the at least one second optical filter, and / or the at least one wavelength conversion member.

[0022] Thanks to this configuration, the at least one display device blocks or transmits the at least one secondary light.

[0023] According to one embodiment, the at least one primary light comprises at least one primary wavelength range of 380 nm to 565 nm, and / or the at least one secondary light comprises at least one secondary wavelength range of 485 nm to 740 nm.

[0024] Thanks to this configuration, the low-energy display device converts the at least one primary light into at least one secondary light having at least one secondary wavelength range by absorbing the primary wavelength range.

[0025] The present invention relates to a watch or smartwatch comprising a low - energy display device for a watch or smartwatch, preferably, configured to display at least one piece of information and to receive at least one primary light, according to an embodiment of the present invention.

[0026] Thanks to this configuration, the watch has a low - power - consuming and enhanced bright low - energy display device.

[0027] The following and other objects, features, aspects, and advantageous points of the present invention will become apparent from the following detailed description of embodiments shown by way of example and not limitation, with reference to the accompanying drawings.

Brief Description of the Drawings

[0028] [Figure 1A] A cross - sectional view of a low - energy display device 100 including at least one quantum dot 141, according to an embodiment of the present invention, is shown. [Figure 1B] A cross - sectional view of a low - energy display device 100 including at least one quantum dot 141, according to an embodiment of the present invention, is shown. [Figure 2A] A cross - sectional view of a low - energy display device 100 including at least one quantum rod 142, according to an embodiment of the present invention, is shown. [Figure 2B] A cross - sectional view of a low - energy display device 100 including at least one quantum rod 142, according to an embodiment of the present invention, is shown.

Modes for Carrying Out the Invention

[0029] Currently, LCDs are widely used in watches and smartwatches, but they lack aesthetic quality and are often too dim. Therefore, this application proposes a low-energy display device 100 for a watch 200 or smartwatch 200, preferably for a watch 200 or smartwatch 200, as depicted in Figures 1A to 2B.

[0030] The present invention relates to a watch 200 or smartwatch 200, preferably comprising a low-energy display device 100 for the watch 200 or smartwatch 200. The low-energy display device 100 is configured to display at least one piece of information and to receive at least one primary light 410. As shown in different figures, the low-energy display device 100 may comprise at least one first optical filter 110, at least one wavelength conversion member 140, at least one reflecting element 150, and at least one optical switch 120. In some embodiments, the low-energy display device 100 may comprise at least one second optical filter 130. In practice, the addition of the at least one second optical filter 130 may, in some cases, induce efficiency loss.

[0031] As described above, when describing the watch 200 or the smartwatch 200, the low-energy display device 100 may receive the at least one primary light 410 comprising at least one first primary wavelength 411, at least one second primary wavelength 412, at least one first primary polarization 411, and / or at least one second primary polarization 412, typically sunlight or artificial light such as incandescent light. For readability, reference numeral 411 in Figures 1A to 2B may specify the at least one first primary wavelength 411 and the at least one first primary polarization 411, and reference numeral 412 may specify the at least one second primary wavelength 412 and the at least one second primary polarization 412.

[0032] For example, as shown in Figures 1A and 2A, the at least one first optical filter 110 may include at least one first polarizer 110 configured to completely or partially transmit the at least one first primary polarization 411 and / or completely or partially block the at least one second primary polarization 412. In practice, the at least one first primary polarization 411 and the at least one second primary polarization 412 may differ in polarization angle by π / 2.

[0033] If the at least one first optical filter 110 may include at least one first color filter 110, then the at least one first primary wavelength 411 may be transmitted, or rather, may pass through the at least one first optical filter 110, and the at least one second primary wavelength 412 may not pass through the at least one first optical filter 110. In practice, the at least one primary light 410 may include at least one primary wavelength range of 380 nm to 565 nm, and the at least one first optical filter 110 may transmit the primary wavelength range of 380 nm to 565 nm and block wavelengths not included in the wavelength range of 380 nm to 565 nm. In other words, the at least one first primary wavelength 411 may be included in the primary wavelength range of 380 nm to 565 nm, and the at least one second primary wavelength 412 may not be included in the primary wavelength range of 380 nm to 565 nm.

[0034] As mentioned above, the at least one primary light 410, more precisely the at least one first primary wavelength 411 and the at least one first primary polarization 411, may pass through the at least one first optical filter 110 and encounter the at least one optical switch 120. The at least one optical switch 120, for example the at least one indicator light switch 120, may completely or partially block or transmit the at least one primary light 410.

[0035] In practice, the at least one optical switch 120 may comprise a liquid crystal display device 120 or a thin-film transistor liquid crystal display device 120 using any of the known liquid crystal modes, which may be a guest-host liquid crystal display, a TN (Twisted Nematic) or STN (Super Twisted Nematic) system, an electrically controlled birefringence system, a VA (Vertically Aligned) system, an IPS (In Plane Switching) system, and / or an FFS (Fringe Field Switching) system. In some embodiments not presented, the at least one optical switch 120 may comprise a guest-host liquid crystal display, which may comprise a dichroic dye, which may comprise the at least one first optical filter 110 and / or the at least one second optical filter 130. In this case, the at least one second optical filter 130 and / or the at least one first optical filter 110 may be optional.

[0036] The difference between Figure 1A and Figure 1B, or between Figure 1B and Figure 2B, is, for example, the orientation of the liquid crystal 122 in the at least one optical switch 120 between at least two electrodes 121, where in Figures 1A and 2A, the liquid crystal may block the at least one first primary wavelength 411 and / or the at least one first primary polarization 411, while in Figures 1B and 2B, the liquid crystal may transmit the at least one first primary wavelength 411 and / or the at least one first primary polarization 411.

[0037] Therefore, after encountering the at least one indicator light switch 120, the at least one primary light 410 further encounters the at least one second optical filter 130. The at least one second optical filter 130 may be optional, and if it is at least one second polarizer 130, it may completely or partially transmit the at least one first primary polarization 411 toward the at least one wavelength conversion member 140. If the at least one second optical filter 130 includes at least one second color filter 130, it transmits the at least one first primary wavelength 411 toward the at least one wavelength conversion member 140.

[0038] As described above, the at least one wavelength conversion member 140 may completely or partially convert the at least one primary light 410. This conversion may be performed by completely or partially absorbing the at least one first primary wavelength 411 and emitting the at least one secondary light 420 comprising at least one first secondary wavelength 421, at least one second secondary wavelength 422, at least one first secondary polarization 421, and at least one second secondary polarization 422.

[0039] In practice, the at least one wavelength conversion member 140 is configured to completely or partially convert the at least one primary light 410 having the at least one primary wavelength range of 380 nm to 565 nm to the at least one secondary light 420 having the at least one secondary wavelength range of 485 nm to 740 nm.

[0040] As illustrated in Figures 1A and 1B, the at least one wavelength conversion member 140 is made of at least one quantum dot 141. In another embodiment depicted in Figures 2A and 2B, the at least one wavelength conversion member 140 is made of at least one quantum rod 142. Naturally, the applicant does not rule out that the at least one wavelength conversion member 140 may comprise the at least one quantum dot 141 and the at least one quantum rod 142. In all different embodiments, the quantum dot 141 and / or the quantum rod 142 convert the at least one primary light 410 into at least one secondary light 420. However, the advantage of the at least one quantum rod 142 is that the at least one quantum rod 142 may be aligned with respect to the polarization-sensitive optical switch 120 so that the transmittance of the at least one secondary light 420 emitted by the at least one quantum rod 142 is maximized. The applicant does not rule out substituting the at least one quantum dot 141 and / or the at least one quantum rod 142 with a phosphorescent or fluorescent material.

[0041] As illustrated in Figures 1B and 2B, a portion of the at least one secondary light 420, more specifically the at least one first secondary wavelength 421 and / or the at least one first secondary polarization 421, may be emitted toward the at least one reflecting element 150.

[0042] The at least one reflective element 150 may include a reflective surface 150, preferably a metallic reflective surface and / or a dielectric reflective surface, or a reflective polarizer, preferably a multiple interference layer and / or a wire grid type, so that the low-energy display device 100 may reflect and / or diffuse the at least one primary light 410 and / or the at least one secondary light 420 depending on the surface of the at least one reflective element 150.

[0043] The remaining portion of the at least one secondary light 420, more specifically the at least one second secondary wavelength 422 and the at least one second secondary polarization 422, may be emitted directly toward and pass through the at least one second optical filter 130 and / or the at least one first optical filter 110. Finally, the at least one first secondary wavelength 421, the at least one first secondary polarization 421, the at least one second secondary wavelength 422, and the at least one second secondary polarization 422 may be guided toward the at least one first optical filter 110 and directed toward the outside of the watch 200 or the smartwatch 200, for example toward the user. [Explanation of symbols]

[0044] 100 Low Energy Display Devices 110 First optical filter, first polarizer, first color filter 120 Optical switches, indicator optical switches, liquid crystal display devices, thin-film transistor liquid crystal display devices, polarization-sensitive optical switches 121 Electrode 122 LCD 130 Second optical filter, second polarizer, second color filter 140 wavelength conversion component 141 quantum dots 142 Quantum Rods 150 Reflective elements, reflective surfaces 200 watches or smartwatches 410 Primary light 411 First primary wavelength, first primary polarization 412 Second primary wavelength, second primary polarization 420 Secondary light 421 First secondary wavelength, first secondary polarization 422 Second secondary wavelength, second secondary polarization

Claims

1. A low-energy display device (100) for a watch (200) or smartwatch (200), configured to display at least one piece of information and to receive at least one primary light (410), - At least one first optical filter (110) comprising at least one first color filter, the first optical filter (110) that transmits a first primary wavelength (411) in the primary wavelength range of 380 nm to 565 nm included in the primary light (410), and blocks a second primary wavelength (412) not included in the primary wavelength range included in the primary light (410), - At least one wavelength conversion member (140) configured to completely or partially absorb the primary light (410) incident through the first optical filter, completely or partially convert the light in the primary wavelength range including the visible region contained in the primary light (410) into at least one secondary light (420) consisting of light in the secondary wavelength range of 485 nm to 740 nm, and to enhance the brightness of the display by emitting this secondary light (420), - At least one optical switch (120) configured to completely or partially block or transmit at least one primary light (410) and / or at least one secondary light (420), - At least one reflective element (150) configured to completely or partially reflect and / or diffuse the at least one secondary light (420) and the at least one primary light (410) emitted from the wavelength conversion member (140) A low-energy display device (100) equipped with [a specific feature].

2. The low-energy display device (100) according to claim 1, wherein the at least one wavelength conversion member (140) is made of at least one quantum dot (141), a phosphorescent material, or a fluorescent material, and / or made of at least one quantum rod (142).

3. The low-energy display device (100) according to claim 2, wherein the at least one quantum rod (142) is configured to align with the polarization to which the at least one optical switch (120) is sensitive.

4. The low-energy display device (100) according to any one of claims 1 to 3, wherein the at least one optical switch (120) comprises a liquid crystal display device (120) or a thin-film transistor liquid crystal display device (120).

5. The low-energy display device (100) according to any one of claims 1 to 4, wherein the at least one reflective element (150) comprises a reflective surface (150) or a reflective polarizer.

6. The low-energy display device (100) according to claim 5, wherein the reflective surface (150) is a metallic reflective surface and / or a dielectric reflective surface, and the reflective polarizer is a multi-interference layer and / or a wire grid type.

7. The low-energy display device (100) according to any one of claims 1 to 6, wherein the at least one primary light (410) comprises the at least one first primary wavelength (411), the at least one second primary wavelength (412), the at least one first primary polarization (411), and / or the at least one second primary polarization (412), and / or the at least one secondary light (420) comprises the at least one first secondary wavelength (421), the at least one second secondary wavelength (422), the at least one first secondary polarization (421), and / or the at least one second secondary polarization (422).

8. The low-energy display device (100) according to claim 7, wherein the at least one first optical filter (110), comprising the at least one first color filter (110), is configured to transmit the at least one first secondary wavelength (421) and / or the at least one second secondary wavelength (422).

9. The low-energy display device (100) according to claim 8, wherein the at least one first optical filter (110) comprises at least one first polarizer (110) configured to completely or partially transmit the at least one first primary polarization (411), the at least one first secondary polarization (421), and / or the at least one second secondary polarization (422), and / or to block the at least one second primary polarization (412).

10. A low-energy display device (100) according to any one of claims 7 to 9, comprising at least one second optical filter (130) having at least one second color filter (130) configured to transmit completely or partially the at least one first primary wavelength (411), the at least one first secondary wavelength (421), and / or the at least one second secondary wavelength (422).

11. The low-energy display device (100) according to claim 10, wherein the at least one optical switch (120) comprises the at least one first optical filter (110) and / or the at least one second optical filter (130), and the at least one first optical filter (110) and / or the at least one second optical filter (130) comprises a dichroic dye.

12. The low-energy display device (100) according to claim 10 or 11, wherein the at least one second optical filter (130) comprises at least one second polarizer (130) configured to transmit all or partially the at least one first primary polarization (411), the at least one first secondary polarization (421), and / or the at least one second secondary polarization (422).

13. The low-energy display device (100) according to any one of claim 10 and claim 12 incorporating claim 10, wherein the at least one optical switch (120) is located between the at least one first optical filter (110), the at least one second optical filter (130), and / or the at least one wavelength conversion member (140).

14. A watch (200) comprising a low-energy display device (100) according to any one of claims 1 to 13, for use as a watch (200) or smartwatch (200), configured to display at least one piece of information and to receive at least one primary light (410).

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