Fluid flow-based self-generation display device

Abstract

The present invention relates to a display device for displaying information by using the flow of a fluid, the display device comprising: a housing; a fluid pouch located inside or outside the housing and configured to generate pressure by being pressed by a user; a fluid pipe fluidly communicating with the fluid pouch and configured to transmit the flow of a fluid by the pressure; a power generation unit disposed inside or outside the fluid pipe and configured to generate electrical energy based on the flow of the fluid; a power processing unit configured to convert the generated electrical energy into power suitable for display driving and provide the power; and a display unit emitting light by the power.

Description

Fluid flow-based self-generating display device

[0001] The present invention relates to a display device utilizing fluid energy, and more specifically, to a self-generating display device that generates power using the flow and pressure of air or other fluids, and drives a light-emitting element such as a light-emitting diode (LED) or a sound-generating element using the generated power, and a method of operation thereof.

[0002] The present invention relates particularly to an energy harvesting-based display technology applicable to various fields such as wearable devices, lightweight electronic devices, or standalone display modules, by generating electrical energy using the flow of fluid generated from a pressure change in a fluid bag without the supply of an external power source or battery, and utilizing this for light emission or sound generation of a display unit.

[0003] In modern society, as the miniaturization and wearability of electronic display devices accelerate, the issue of stable energy supply is emerging. Conventional battery-based power systems require replacement due to limited charging cycles and lifespans, and user convenience is reduced in environments where replacement is difficult. Furthermore, environmental problems caused by the disposal of waste batteries and a high dependence on external power sources have been pointed out.

[0004] Meanwhile, although various energy harvesting technologies have been attempted to mitigate dependence on external power sources, there are cases where these methods alone show limitations in terms of application scope or efficiency. Therefore, an alternative is required that can simultaneously alleviate both battery dependence and the limitations of energy harvesting.

[0005] As an approach to address these demands, a technology that generates the power required for display devices using fluid flow and pressure can be considered. This approach aims to minimize the use of external power sources or separate batteries, while providing the possibility of power generation in small-scale power generation units, environmental friendliness, and diverse application possibilities.

[0006] The present invention aims to solve the problem of constant charging and replacement by minimizing dependence on external power sources and batteries.

[0007] The present invention aims to solve the problem of environmental pollution caused by battery replacement and disposal.

[0008] This invention aims to resolve the application limitations of conventional energy harvesting technologies centered on vibration, shock, and contact by mitigating them and presenting a fluid flow and pressure-based alternative.

[0009] The present invention aims to solve the problem of difficulty in driving light-emitting elements, such as LEDs, by stably generating and supplying power even with a simple structure in small display devices.

[0010] The present invention relates to a display device that performs light emission or sound generation using a fluid flow, comprising: a housing; a fluid bag located on the inner or outer side of the housing and configured to generate pressure by being pressed by a user; a fluid pipe configured to communicate fluidically with the fluid bag and to transmit the flow of fluid by the pressure; a power generation unit disposed on the inner or outer side of the fluid pipe and configured to generate electrical energy based on the flow of the fluid; a power processing unit configured to convert the generated electrical energy into a power source suitable for driving a display and provide it; and a display unit that emits light by the power source.

[0011] In addition, the power generation unit includes a piezoelectric generator or a friction generator.

[0012] In addition, the power processing unit further includes a rectifier that rectifies power output from the power generation unit; and a storage unit that stores the rectified power.

[0013] In addition, the display unit includes a light-emitting element or a sound-generating device, and is configured such that power generated by the flow of fluid transmitted along the fluid pipe is supplied to the light-emitting element or the sound-generating device.

[0014] The present invention relates to a method of operation for a display device that performs light emission or sound generation using a fluid flow, comprising: a step in which a fluid bag of the display device generates internal pressure in response to an external force; a transmission step in which a fluid pipe of the display device transmits a fluid flow based on the internal pressure; a step in which a power generation unit of the display device generates electrical energy based on the fluid flow; a conversion step in which a power processing unit of the display device converts the electrical energy into a power source suitable for display driving; a determination step in which a driving unit of the display device determines whether the voltage of a capacitor unit has reached a threshold value (Vth); a step in which, if the driving unit determines that the voltage of the capacitor unit is greater than or equal to the threshold value, the power source is applied to a display unit of the display device; and a step in which the display unit emits light by the applied power source.

[0015] Additionally, the conversion step further comprises: a step in which the power processing unit rectifies the electrical energy by the rectifier of the display device; and a step in which the power processing unit stores the rectified power in the capacitor of the display device.

[0016] Additionally, the above judgment step further includes the step of the fluid tube performing the transmission step again when the driving unit determines that the voltage of the capacitor is below a threshold value.

[0017] The present invention provides the effect of enabling power generation even in a compact structure by directly driving a piezoelectric generator or a friction generator using fluid flow and pressure.

[0018] The present invention provides a sustainable power supply means capable of driving a display unit with its own power without an external power source.

[0019] The present invention provides a display function that stably generates light or sound by supplying generated power to a light-emitting body such as an LED or a sound-generating device such as a speaker and a buzzer.

[0020] Based on a simple configuration and method, the present invention provides the possibility of expansion into various application fields, such as wearables.

[0021] FIG. 1 is a block diagram illustrating the configuration of a display device according to one embodiment of the present invention.

[0022] FIG. 2 is a drawing for explaining the operation method of a display device according to an embodiment of the present invention.

[0023] FIG. 3 is a drawing illustrating the external configuration of a wearable display device according to one embodiment of the present invention.

[0024] FIG. 4 is an enlarged drawing illustrating an example of a module structure disposed at the end of a fluid pipe according to one embodiment of the present invention.

[0025] Specific details of the embodiments are included in the detailed description and drawings.

[0026] The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0027] FIG. 1 is a block diagram illustrating the configuration of a display device according to one embodiment of the present invention.

[0028] fluid bag (110)

[0029] According to one embodiment of the present invention, a fluid bag (110) can perform the function of converting a user's mechanical input into fluid energy and transmitting it to a fluid tube (120). Specifically, the fluid bag (110) is composed of an expandable chamber having elastic restoring force, and when a user presses the fluid bag (110) to reduce its volume, the internal pressure increases, thereby forming a flow of fluid into the fluid tube (120). The formed flow and pressure mechanically stimulate a power generation unit (130)—a piezoelectric generator (131) or a triboelectric generator (132)—to generate electrical energy. The generated electrical energy can be used to drive an output means (151) of a display unit (150) through a power processing unit (140) via rectification, storage, and driving processes. For example, if the output means (151) includes an LED, it can perform lighting or flashing, and if the output means (151) includes a buzzer, a speaker, or a piezoelectric element, it can perform sound output.

[0030] According to one embodiment of the present invention, the fluid bag (110) may be formed of an elastic material with appropriate hardness and thickness to account for fatigue caused by repeated operation, and may return to its original volume to prepare for the next operation when the user releases the press due to self-restoration. Additionally, a valve may be provided between the fluid bag (110) and the fluid pipe (120) to assist unidirectional flow, and a plurality of fluid bags (110) may be arranged in parallel or in series to control the flow rate and pressure per unit press, or to implement independent driving patterns for left and right channels.

[0031] According to one embodiment of the present invention, a fluid bag (110) may be placed on the inside or outside of a housing (160) to convert mechanical input from a user into fluid energy and transmit it to a fluid pipe (120). For example, when the fluid bag (110) is placed on the inside of the housing (160), the connection between the fluid bag (110) and the fluid pipe (120) is protected by the housing (160), thereby reducing damage or leakage caused by external impact, moisture, and dust, and preventing displacement and bending of the pipe during repeated operations, thereby improving the reproducibility of pressure transmission.

[0032] In another embodiment, even when the fluid bag (110) is positioned on the outside of the housing (160), the fluid bag (110) may be configured to directly receive a user's press input while coupled with the housing (160) to increase internal pressure, and to transmit the increased pressure and the formed flow rate to the power generation unit (130) through the fluid pipe (120).

[0033] Fluid pipe (120)

[0034] According to one embodiment of the present invention, the fluid pipe (120) can function as a fluid transmission path to transmit pressure and flow rate generated in the fluid bag (110) to the power generation unit (130) without loss or leakage. Specifically, the fluid pipe (120) is placed inside the housing (160) to fluidly connect the discharge portion of the fluid bag (110) and the suction portion of the power generation unit (130), and the diameter, length, and cross-sectional shape of the pipe can be designed to match the target flow rate, response speed, and user operating force. In addition, a smooth inner surface treatment to minimize flow resistance, a sealing structure to prevent leakage, and reinforcing ribs to protect the bends can be applied inside the pipe.

[0035] According to one embodiment of the present invention, the fluid tube (120) may include a check structure to assist unidirectional flow according to the embodiment, a nozzle / venturi section to increase power generation efficiency, a swirler (vortex forming section), a rib / irregular section, etc. Such internal shapes may contribute to forming pulsating flow or local flow velocity to increase the response of the piezoelectric generator (131) or the friction generator (132). Depending on the arrangement of the power generation section (130), the fluid tube (120) may have a housing pocket in a predetermined section to accommodate a power generation section inserted into the tube, or an end coupling section to be connected to a power generation section placed at the end.

[0036] Power generation unit (130)

[0037] According to one embodiment of the present invention, the power generation unit (130) can function as a module that generates electrical energy by converting the pressure, flow rate, and pulsation of the fluid transmitted along the fluid pipe (120) into mechanical stimulation. The power generation unit (130) may be placed in an internal or external section of the fluid pipe (120), and the electrical energy generated by the power generation unit (130) may be supplied to the power processing unit (140) and, after undergoing rectification, storage, and driving processes, used to drive the output means (151) of the display unit (150). Additionally, the power generation unit (130) may be composed of a single element or a series or parallel combination of multiple elements and may be adjusted to match the target voltage and current levels.

[0038] According to one embodiment of the present invention, the piezoelectric generator (131) can receive pressure fluctuations or vibrations and deformations generated from the fluid into the receiving portion and generate an alternating current voltage by the piezoelectric effect. The output can be improved by setting a resonance frequency and matching mechanical impedance to match the pulsation characteristics of the fluid tube (120). Since the output of the piezoelectric generator (131) includes pulse / alternating current components, it is desirable to form a stable power source by combining it with the rectifier (141) and capacitor (142) of the power processing unit (140).

[0039] According to one embodiment of the present invention, a triboelectric generator (132) can generate electric charge by utilizing contact-separation or sliding induced by fluid flow, through triboelectric (triboelectric) effects and electrostatic induction. The material combination of the electrode / triboelectric layer and the surface microstructure have a direct effect on the output, and efficiency can be increased by securing periodic contact cycles according to changes in flow direction and velocity. Since the output of the triboelectric generator (132) also has abnormal / pulse characteristics, it is advantageous to convert and store it into a voltage and current suitable for driving the output means (151) through linkage with the power processing unit (140).

[0040] Additionally, the power generation unit (130) may optionally include one or more of a piezoelectric generator (131) or a friction generator (132) depending on the usage scenario of the device (pressure strength, frequency, flow rate range), and when both methods are used in combination, a supplementary output effect can be expected in the low flow rate / low period region and the high flow rate / high period region.

[0041] Power processing unit (140)

[0042] According to one embodiment of the present invention, the power processing unit (140) can function as a module that converts power generated by the power generation unit (130) into power suitable for driving the output means (151) of the display unit (150). Specifically, the power processing unit (140) may include a rectifier (141), a capacitor (142), and a driving unit (143). The rectifier (141) rectifies the alternating current / pulse component of the power generation unit output into a unipolar voltage, and the capacitor (142) stores the rectified power to reduce ripple and secure critical energy required for LED lighting. Additionally, the driving unit (143) can perform current limiting and switching according to the characteristics of the LED or sound generating device.

[0043] Display part (150)

[0044] According to one embodiment of the present invention, the display unit (150) can function as a module that provides information to a user using power supplied from the power processing unit (140). Specifically, the display unit (150) may be configured to output visual information or auditory information. For example, the display unit (150) may include an output means (151), and the output means (151) may include at least one of an LED, a buzzer, a speaker, and a piezoelectric element. When the output means (151) includes an LED, the LED may be lit or blinked when power generated from the power generation unit (130) is applied after undergoing rectification, storage, and driving processes. In addition, when the output means (151) includes a buzzer, a speaker, or a piezoelectric element, various auditory outputs such as sound output, periodic beep output, and patterned warning sound output may be implemented when the power is applied.

[0045] According to one embodiment of the present invention, the display unit (150) may be composed of a single output means (151) or a combination of multiple output means (151) depending on the use of the device. For example, if the output means (151) includes an LED, it may be formed as a single LED configuration or an array configuration of multiple LEDs, and various lighting patterns such as continuous lighting, periodic flashing, and alternating left and right channel lighting may be implemented by the control of the driving unit (143). Similarly, even if the output means (151) includes a buzzer, a speaker, or a piezoelectric element, continuous sound, periodic output sound (beep sound), and pattern output using a combination of different frequencies, intensities, and duty cycles may be implemented by the control of the driving unit (143).

[0046] Additionally, the display unit (150) may be combined with the housing (160) and positioned to be protected from external shocks and environmental factors. For example, if the output means (151) includes an LED, the diffusion, luminous intensity, color, and light emission area may be selected to match the desired visibility and visual effects, and if the output means (151) includes a buzzer, speaker, or piezoelectric element, the volume of the sound, frequency band, output direction, and aperture structure may be selected to match the desired audibility and notification effects.

[0047] According to one embodiment of the present invention, the display unit (150) may include a light-emitting element or a sound generating device. For example, the display unit (150) may include a light-emitting element such as an LED, a laser diode, or an organic light-emitting element to output visual information, and may include a sound generating device such as a buzzer, a speaker, or a piezoelectric element to output auditory information. Additionally, when the power generation unit (130) generates power by the flow and pressure of the fluid formed in the fluid bag (110) and transmitted along the fluid pipe (120), the power processing unit (140) may rectify and / or store the power to convert it into power that can be supplied to the display unit (150), and accordingly, the power may be configured to be supplied to the light-emitting element or the sound generating device. For example, when the power is supplied to the light-emitting element, the light-emitting element may perform lighting, blinking, brightness change, or pattern light emission, and when the power is supplied to the sound generating device, the sound generating device may output a beep sound, frequency / volume change, or a patterned notification sound.

[0048] Housing (160)

[0049] According to one embodiment of the present invention, the housing (160) can function as a structure that forms the outer shape of the display device (100) and is responsible for supporting, protecting, and arranging each component. Specifically, the housing (160) may be formed to include a receiving portion, a placement portion, and a wiring / pipeline guide groove so that the fluid pouch (110), the fluid pipe (120), the power generation unit (130), the power processing unit (140), and the display unit (150) are stably fixed in a predetermined position. For example, a pipe loading channel may be provided inside to maintain the curvature of the fluid pipe (120) and prevent leakage, and module pockets for the power generation unit (130) and the power processing unit (140) may be provided to protect them from shock and vibration.

[0050] According to one embodiment of the present invention, the housing (160) may be implemented with an elastic material (e.g., silicone / TPU) or a fiber-film laminate depending on the usage environment to ensure a comfortable fit, and may further include a sealing structure to protect internal components from sweat, dust, and moisture. For maintenance, the module pocket may be provided with an openable cover, and the light diffusion window or protective window of the display unit (150) may be integrally formed to ensure durability.

[0051] FIG. 2 is a drawing for explaining the operation method of a display device according to an embodiment of the present invention.

[0052] Device preparation step (S10)

[0053] In the device preparation step (S10) according to one embodiment of the present invention, the housing (160) is positioned to fix the position of each component to a reference state and block shock and contamination from the outside. In addition, the fluid bag (110) returns to its basic volume by elastic restoring force to equalize the internal pressure to the level of atmospheric pressure, and the connection state of the fluid pipe (120) is confirmed so as to fluidly communicate the fluid bag (110) and the power generation unit (130) without leakage.

[0054] According to one embodiment of the present invention, the power generation unit (130) is in a standby state with mechanical interference removed so that it can be freely driven at a predetermined location of the fluid pipe (120). Meanwhile, the power processing unit (140) performs an initialization routine to stabilize the bias state of the rectifier unit (141) and discharges the voltage of the capacitor unit (142) below a threshold value to prevent malfunction caused by residual energy. Additionally, the driving unit (143) can set a standby state that prohibits display driving by blocking the output path. At this time, the display unit (150) can be maintained in an inactive state so that no visual or auditory output occurs. For example, if the display unit (150) includes an output means (151), it can be controlled so that the light output or sound output of the output means (151) is not performed. Accordingly, preparation is completed so that only normal operation caused by fluid flow occurring in the subsequent user input collection step (S20) is displayed.

[0055] User input collection step (S20)

[0056] In the user input collection step (S20) according to one embodiment of the present invention, the fluid bag (110) reduces its volume by the user's pressing action and increases its internal pressure to form a fluid driving force to be transmitted to the fluid pipe (120). Additionally, the housing (160) supports the fluid bag (110) at a predetermined position to stabilize the pressing direction and the restoration movement, and the fluid pipe (120) accommodates the initial pressure change without leakage while fluidically communicating with the discharge part of the fluid bag (110).

[0057] According to one embodiment of the present invention, a structure that assists unidirectional flow may be applied to the fluid pipe (120), so that backflow is minimized even when the fluid bag (110) is released from compression, thereby ensuring that fluid flow generation in the fluid flow generation step (S30) is carried out smoothly. As a result of the user input collection step (S20), a pressure rise and initial flow rate sufficient to induce a response of the power generation unit (130) are secured within the fluid pipe (120), and the power processing unit (140) and the display unit (150) maintain a standby state for operation.

[0058] Fluid flow generation step (S30)

[0059] In the fluid flow generation step (S30) according to one embodiment of the present invention, a pressure rise formed by the compression of the fluid bag (110) proceeds along the fluid pipe (120) to form a flow rate and pressure profile inside the display device (100). Additionally, the fluid pipe (120) is supported by a housing (160) to maintain a predetermined curvature and cross-section, thereby minimizing leakage. In this process, the pulsation (pulse) component, local flow velocity, and static / dynamic pressure distribution can be determined by the length, diameter, and internal shape of the fluid pipe (120).

[0060] Power generation unit driving stage (S40)

[0061] In the power generation unit driving step (S40) according to one embodiment of the present invention, the flow of fluid and pressure change transmitted along the fluid pipe (120) act as a mechanical stimulus on the power generation unit (130) to generate electrical energy. Specifically, the power generation unit (130) is positioned inside or at the end of the fluid pipe (120), and in one embodiment, may include one or more of a piezoelectric generator (131) or a friction generator (132).

[0062] According to one embodiment of the present invention, a piezoelectric generator (131) generates an electric charge by the piezoelectric effect when pressure waves or vibrations introduced through a fluid pipe (120) are transmitted to the element, and the generated electric charge is transmitted to a power processing unit (140) to undergo rectification and energy storage processes. On the other hand, a triboelectric generator (132) generates an electric charge by the triboelectric (triboelectric) effect using contact-separation or sliding motion generated by fluid flow. At this time, a repetitive contact cycle between electrodes is formed, so that the power generation cycle can be stably maintained.

[0063] According to one embodiment of the present invention, the power generation unit (130) converts the mechanical energy of the fluid flow into electrical energy through such a piezoelectric or frictional conversion process, and the generated power is transferred to the power processing unit (140) and can be used in the next step, the rectification stabilization step (S50).

[0064] Rectification stabilization step (S50)

[0065] In the rectification stabilization step (S50) according to one embodiment of the present invention, power generated in the power generation unit (130) is transferred to the power processing unit (140), and a process of stabilization is performed centering on the rectification unit (141) and the capacitor unit (142). Specifically, the rectification unit (141) converts the AC component or pulsed voltage of the output of the power generation unit (130) into a unipolar DC voltage, thereby maintaining the polarity of the voltage supplied to the circuit thereafter constant. Since the piezoelectric generator (131) or the friction generator (132) generates irregular waveforms according to fluid flow and pressure changes, it is essential to convert these waveforms into a stable form through a rectification process.

[0066] The rectified voltage can then be stored in the capacitor (142). The capacitor (142) may include a storage device such as a capacitor or a supercapacitor, and enables stable operation of the output means (151) by mitigating instantaneous power fluctuations and stabilizing the voltage. Additionally, the capacitor (142) can determine the timing for transferring power to the next step, the display driving step (S70), by monitoring whether the voltage based on the accumulated charge has reached a preset threshold voltage or higher.

[0067] Capacitor threshold determination step (S60)

[0068] In the capacitor threshold determination step (S60) according to one embodiment of the present invention, it is determined whether the voltage or charge amount stored in the capacitor (142) has reached a threshold value (Vth) required for driving the display unit (150).

[0069] According to one embodiment of the present invention, the capacitor (142) within the power processing unit (140) continuously charges the rectified power in the rectification stabilization step (S50), and the driving unit (143) can monitor the voltage of the capacitor (142) in real time. At this time, if the voltage of the capacitor (142) is below a threshold value, i.e., if it corresponds to a "NO" condition, there is insufficient energy to drive the display unit (150), so it can return to the user input collection step (S20). Accordingly, the user can press the fluid bag (110) again to generate fluid flow, and the power generation unit (130) can generate additional power and accumulate more in the capacitor (142). On the other hand, if the voltage of the capacitor (142) rises above a threshold value, i.e., if it corresponds to a "YES" condition, the driving unit (143) can open the power supply path and transfer the stored power to the display unit (150) to proceed to the display driving step (S70).

[0070] Thus, the display unit (150) can initiate a visual or auditory display based on the applied power, for example, if the display unit (150) includes an output means (151) and the output means (151) includes an LED, lighting or flashing can be performed, and if the output means (151) includes a buzzer, a speaker, or a piezoelectric element, sound output or patterned sound output can be performed.

[0071] Display driving step (S70)

[0072] In the display driving step (S70) according to one embodiment of the present invention, the driving unit (143) of the power processing unit (140) may perform an operation to apply power accumulated in the capacitor (142) to the display unit (150) to perform a visual or auditory display. Specifically, the display unit (150) may include an output means (151), and the output means (151) may include at least one of an LED, a buzzer, a speaker, and a piezoelectric element. The driving unit (143) may perform current limiting, ON / OFF switching, or duty control (PWM), etc., for driving the output means (151) based on the DC power supplied from the rectifier (141) and the capacitor (142). Accordingly, if the output means (151) includes an LED, various lighting patterns such as continuous lighting, periodic flashing, and alternating left / right channel lighting can be implemented, and if the output means (151) includes a buzzer, a speaker, or a piezoelectric element, desired auditory output patterns such as sound output, periodic beeping output, and patterned warning sound output can be implemented.

[0073] FIG. 3 is a drawing illustrating the external configuration of a wearable display device according to one embodiment of the present invention.

[0074] As described, the housing (160) has an outer shape resembling a headband and an ear, and fluid pouches (110) that receive user press input are disposed at the left and right ends. Each fluid pouch (110) is fluidly connected to a fluid pipe (120) extending upward, and a power generation unit (130) that generates electricity in response to fluid flow is disposed in the middle section of the fluid pipe (120).

[0075] According to one embodiment of the present invention, power generated in a power generation unit (130) is provided through a power processing unit (140) in a path leading upward, undergoing rectification, storage, and driving processes, and can drive a display unit (150) placed in the ear tip area to generate a visual or auditory output. For example, the display unit (150) may include an output means (151), and the output means (151) may include at least one of an LED, a buzzer, a speaker, and a piezoelectric element. Accordingly, if the output means (151) includes an LED, it may emit light, and if the output means (151) includes a buzzer, a speaker, or a piezoelectric element, it may output sound.

[0076] FIG. 3 shows an example in which a fluid-power path leading from a fluid bag (110) -> fluid pipe (120) -> power generation unit (130) -> power processing unit (140) -> output means (151) is implemented symmetrically inside a housing (160).

[0077] FIG. 4 is an enlarged drawing illustrating an example of a module structure disposed at the end of a fluid pipe according to one embodiment of the present invention.

[0078] As described, when the fluid flow rising along the fluid pipe (120) reaches the end, pressure acts on the power generation unit (130) to generate electricity, and the generated power is used to drive the upper display unit (150).

[0079] As shown in the enlarged view, an output means (151) for visual or auditory output may be disposed in the display unit (150), and the output means (151) may include at least one of an LED, a buzzer, a speaker, and a piezoelectric element. Additionally, a piezoelectric generator (131) or a triboelectric generator (132) that responds to fluid stimulation may be stacked and disposed therein. Through such a stacked configuration, the flow of the fluid pipe (120) is directly transmitted to the power generation unit (130) and converted into power, and the converted power is applied to the display unit (150) to perform a visual display such as light emission from the output means (151) or an auditory display such as sound output from the sound output means, thereby implementing an operating principle.

[0080] The scope of the present invention is not limited to the embodiments described above but may be implemented in various forms of embodiments within the scope of the appended claims. It is deemed that the scope of the claims of the present invention includes various modifications that are possible by anyone with ordinary knowledge in the technical field to which the invention pertains, without departing from the essence of the invention claimed in the claims.

[0081] [Explanation of the symbol]

[0082] 100: Display device

[0083] 110: Fluid bag

[0084] 120: Fluid pipe

[0085] 130: Power Generation Department

[0086] 131: Piezoelectric Generator

[0087] 132: Friction Generator

[0088] 140: Power processing unit

[0089] 141: Rectifier

[0090] 142: Congratulatory Department

[0091] 143: Drive unit

[0092] 150: Display unit

[0093] 151: Means of output

[0094] 160: Housing

Claims

1. In a display device that performs light emission or sound generation using fluid flow, Housing; A fluid pouch located on the inner or outer side of the above housing and configured to generate pressure by pressing by a user; A fluid pipe configured to be fluidically connected to the above fluid bag and to transmit the flow of fluid due to the above pressure; A power generation unit configured to be positioned on the inner or outer side of the fluid pipe and to generate electrical energy based on the flow of the fluid; A power processing unit configured to convert the generated electrical energy into a power source suitable for display driving and provide it; and A display unit that displays information by the above power source; comprising A display device that displays information using fluid flow.

2. In Paragraph 1, The above-mentioned power generation unit is, including a piezoelectric generator or a friction generator, A display device that displays information using fluid flow.

3. In Paragraph 1, The above power processing unit is, A rectifier that rectifies power output from the above-mentioned power generation unit; and A capacitor unit for storing the above-mentioned rectified power; further comprising A display device that displays information using fluid flow.

4. In Paragraph 1, The above display unit is, It includes output means for visual output or auditory output, and Configured so that power generated by the flow of fluid transmitted along the above fluid pipe is supplied to the above output means. A display device that displays information using fluid flow.

5. In Paragraph 1, The above output means is, including at least one of an LED (Light Emitting Diode), a buzzer, a speaker, and a piezoelectric element, A display device that displays information using fluid flow.

6. In Paragraph 1, The above display unit is, It includes a light-emitting element or a sound-generating device, and Power generated by the flow of fluid transmitted along the fluid pipe is configured to be supplied to the light-emitting element or the sound generating device. A display device that displays information using fluid flow.

7. A method of operation of a display device that performs light emission or sound generation using fluid flow, A step in which the fluid bag of the above-mentioned display device generates internal pressure in response to an external force; A transmission step in which the fluid pipe of the above-mentioned display device transmits a fluid flow based on the internal pressure; A step in which the power generation unit of the above-mentioned display device generates electrical energy based on the flow of the above-mentioned fluid; A conversion step in which the power processing unit of the above-described display device rectifies and stores the electrical energy to generate power suitable for driving the display; A determination step in which the driving unit of the power processing unit determines whether the voltage of the stored power source has reached a predetermined threshold value (Vth); A step of applying the power to the display unit of the display device when the driving unit determines that the voltage is above a threshold value; and The above display unit includes the step of displaying information by performing visual output or auditory output by the above-applied power source. Method of operation of a display device.

8. In Paragraph 7, The above conversion step is, The step of the power processing unit rectifying the electrical energy by the rectifier of the display device; and The above power processing unit further comprises the step of storing the rectified power in the capacitor of the display device. Method of operation of a display device.

9. In Paragraph 7, The above judgment step is, A step of causing the transmission step to be performed again when the driving unit determines that the voltage is below a threshold value; further comprising Method of operation of a display device.

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