KR102651803B1 - Biorhythm-based tunable image display device - Google Patents

Abstract

The present disclosure includes a display panel including a first pixel and a second pixel; And based on the user health profile, input data (r, g, b) input from an external device is converted into first output data (R1, G1, B1) displayed in the first pixel and first output data (R1, G1, B1) displayed in the second pixel. 2 Display control unit converting to output data (R2, G2, B2); and wherein light output from at least one sub-pixel of the first pixel has a different central wavelength from light output from a corresponding sub-pixel of the second pixel.

Description

Biorhythm-based tunable image display device}

The present invention relates to a biorhythm-based wavelength tunable image display device.

Various life phenomena such as development, physiology, metabolism, and behavior show various types of periodic characteristics along with the tendency to maintain homeostasis. This essential periodicity commonly observed in most living organisms, including humans, is collectively referred to as biological rhythm.

Like most living things, the human body moves according to biological rhythms. Things that happen to the human body, such as sleeping and waking up, secretion of hormones in the body, and changes in body temperature, change according to biorhythms.

Most modern people work too busy, sleep little, and have irregular life patterns. These environmental changes disrupt biological rhythms. Disruption of biological rhythms can cause diseases such as insomnia and depression.

Light is one of the important factors affecting biological rhythms, and it regulates physiological functions through hormones that respond sensitively to it. Therefore, if light is utilized well, disturbed biological rhythms can be corrected and diseases such as insomnia and depression can be treated.

The above-mentioned background technology is technical information that the inventor possessed for deriving the present invention or acquired in the process of deriving the present invention, and cannot necessarily be said to be known art disclosed to the general public before filing the application for the present invention.

Proper use of light can correct disturbed biological rhythms and treat diseases such as insomnia and depression. However, it is difficult for individuals to purchase commercially available light therapy equipment due to limitations such as cost, and it is mainly used in specific facilities such as hospitals. Because it is installed and operated in , user accessibility is not good.

The purpose of the present invention is to solve the above problem. It has a light source used in a general image display device and a light source with a central wavelength band with excellent light therapy effect, so that the user can obtain a light therapy effect while watching the image at the same time. The purpose is to provide a display device.

As a means to solve the above-described problem, the present invention has embodiments with the following features.

The present invention relates to a display panel including a first pixel and a second pixel; And based on the user health profile, input data (r, g, b) input from an external device is converted into first output data (R1, G1, B1) displayed in the first pixel and first output data (R1, G1, B1) displayed in the second pixel. 2 Display control unit converting to output data (R2, G2, B2); wherein the light output from at least one sub-pixel of the first pixel has a different central wavelength from the light output from the corresponding sub-pixel of the second pixel.

The light output from the blue (B) sub-pixel of the first pixel has a different central wavelength from the light output from the blue (B) sub-pixel of the second pixel.

The light output from the green (G) sub-pixel of the first pixel has a different central wavelength from the light output from the green (G) sub-pixel of the second pixel.

The light output from the red (R) sub-pixel of the first pixel has a different central wavelength from the light output from the red (R) sub-pixel of the second pixel.

The central wavelength of light output from the blue (B) sub-pixel of the second pixel is characterized in that it is 460 nm to 470 nm.

The display control unit converts input data (r, g, b) into first output data (R1, G1, B1) displayed on the first pixel and second output data displayed on the second pixel ( It is characterized by conversion to R2, G2, B2).

where x is the weight value for the first pixel, y is the weight value for the second pixel,

p1 is the red (r) subpixel, p2 is the green (g) subpixel, and p3 is the weight value for the blue (b) subpixel.

The display control unit sets a display mode of the display device based on the user health profile, and the display mode includes input data (r, g, b), first output data (R1, G1, B1), and second output data. (R2, G2, B2) is the same optimal viewing mode; A non-viewing mode in which at least one of the first output data (R1, G1, B1) and the second output data (R2, G2, B2) has a value of 0; and a viewing mode that applies different weights to the input data (r, g, b) to convert them into first output data (R1, G1, B1) and second output data (R2, G2, B2); It includes, and in the non-viewing mode, the display control unit ignores input data (r, g, b) input from an external device, and sets r, g, and b to the maximum gray level value (255 based on 8-bit data). This is characterized in that it is converted into the first output data (R1, G1, B1) and the second output data (R2, G2, B2).

The video display device further includes a health profile creation module that collects the user's biorhythm through an IoT sensor 70 attached to the user, analyzes it, and generates a temporary user health profile (A).

The image display device includes a biometric health confirmation unit that checks whether there is an abnormality in the temporary user health profile (A) created by the health profile creation module 11, and the biometric health confirmation unit stores the temporary user health profile (A). Compared to the normal person's health profile (B), if the difference exceeds the standard value, the user's health temporary profile (A) is replaced with the previously stored normal person's health profile (B) to create a user health permanent profile (C) , If the difference is less than or equal to the reference value, the user health temporary profile (A) is generated as the user health permanent profile (C).

The first pixel and the second pixel are arranged to cross each other up and down and left and right on the display panel.

The first pixel is disposed in the center of the display panel, and the second pixel is disposed in the outer portion of the display panel.

The pixels are formed by arranging first pixels and second pixels in an alternating row on the display panel.

The pixels are formed by arranging first pixels and second pixels in one row at a time on the display panel.

The display panel includes an OLED element forming a first pixel and a second pixel, and the OLED element includes a first electrode, an emitting layer (EML) applied on the first electrode, and a second electrode formed on the emitting layer. And, the material of the light emitting layer (EML) forming the sub-pixel of the second pixel (L2) is formed differently from the material of the light emitting layer (EML) forming the sub-pixel of the corresponding first pixel (L1). .

The light-emitting layer (EML) includes a host and a dopant added to the host, and the dopant material of the light-emitting layer (EML) forming a sub-pixel of the second pixel (L2) is added to the corresponding first pixel (L2). It is characterized by being formed differently from the dopant material of the light emitting layer (EML) that forms the sub-pixel of the pixel (L1).

The light emitting layer (EML) includes a host and a dopant added to the host, and the host material of the light emitting layer (EML) forming the sub-pixel of the second pixel (L2) is mixed with the corresponding first pixel (L2). It is characterized by being formed the same as the host material of the light emitting layer (EML) forming the sub-pixel of the pixel (L1).

The display panel includes an OLED element forming a first pixel and a second pixel, and the display panel includes a color conversion layer, wherein the color conversion layer is the first pixel (L1) or the second pixel (L1). It is characterized in that it is formed only in at least one sub-pixel constituting one of the pixels L2.

The display panel is composed of a liquid crystal display device (LCD), and includes a color filter (CF) forming a sub-pixel of the second pixel (L2) and a color filter (CF) forming a sub-pixel of the corresponding first pixel (L1). CF) and is characterized in that the central wavelength of light output from the sub-pixel is different between the second pixel (L2) and the first pixel (L2).

The display panel is composed of a liquid crystal display device (LCD), and the LEDs constituting the backlight unit (BLU) in the display panel are characterized by being composed of a first LED and a second LED having different center wavelengths.

The display panel is characterized in that the backlight unit (BLU) is arranged directly, and the first LED and the second LED are arranged to cross each other up and down and left and right on the display panel.

The display panel is characterized in that the backlight unit (BLU) is disposed directly under the display panel, wherein the first LED is disposed at the center of the display panel and the second LED is disposed at the outer portion of the display panel. Do it as

The display panel is characterized in that the backlight unit (BLU) is arranged directly, and the first LED and the second LED are arranged in one row in an alternating manner on the display panel.

The display panel is characterized in that the backlight unit (BLU) is arranged directly, and the first LED and the second LED are arranged in one row in an alternating manner on the display panel.

The video display device disclosed by the present invention has a light source used in a general video display device and a light source with a central wavelength band excellent for phototherapy effect, so that the user can obtain the phototherapy effect while watching the image.

In addition, the present invention can collect the user's biorhythm through an IoT sensor attached to the user and analyze it to create a user health profile.

Additionally, the present invention can form pixels with different center wavelengths to generate various wavelengths suitable for treating the user's disturbed biological rhythm.

In addition, the present invention is capable of generating various wavelengths suitable for biorhythm therapy rather than simple gray level modulation, so the biorhythm treatment effect is high.

1 is a block diagram showing the configuration of a display device according to an embodiment of the present invention.
FIG. 2 is a circuit diagram showing an example of the pixel shown in FIG. 1.
Figure 3 is a block diagram of a control unit according to an embodiment of the present invention.
Figure 4 is a diagram schematically showing the amount of energy according to the wavelength of light displayed by the first pixel (L1) and the second pixel (L2).
5 to 8 are diagrams for explaining the arrangement of the first pixel L1 and the second pixel L2 disposed on the display panel.
Figure 9 is a cross-sectional view of the pixel structure when the display panel according to an embodiment of the present invention is made of RGB OLED elements.
FIG. 10 is a cross-sectional view of a pixel structure when a display panel according to another embodiment of the present invention is made of RGB OLED elements, and FIG. 11 is a top view.
FIG. 12 is a cross-sectional view of a pixel structure when a display panel according to another embodiment of the present invention is made of a WOLED element, and FIG. 13 is a top view.
14 to 19 illustrate a case where a display panel according to another embodiment of the present invention is configured as a liquid crystal display (LCD).

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification, when a component (or region, layer, portion, etc.) is referred to as “on,” “connected,” or “coupled to” another component, it means that it is on the other component. This means that they can be directly connected/combined or a third component can be placed between them.

Like reference numerals refer to like elements. Additionally, in the drawings, the thickness, proportions, and dimensions of components are exaggerated for effective explanation of technical content. “And/or” includes all combinations of one or more that the associated configurations may define.

Terms such as first, second, etc. may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, a first component may be referred to as a second component, and similarly, the second component may be referred to as the first component without departing from the scope of the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

Terms such as “below,” “on the lower side,” “above,” and “on the upper side” are used to describe the relationship between the components shown in the drawings. The above terms are relative concepts and are explained based on the direction indicated in the drawings.

"include." Or “to have.” Terms such as are intended to designate the presence of features, numbers, steps, operations, components, parts, or a combination thereof described in the specification, but are intended to indicate the presence of one or more other features, numbers, steps, operations, components, parts, or It should be understood that the existence or addition possibility of combinations of these is not excluded in advance.

As the information society develops, various types of display devices are being developed. Recently, various display devices such as liquid crystal display (LCD), plasma display panel (PDP), and organic light emitting display (OLED) are being used.

The image display device provided by the present invention has a light source used in a general image display device and a light source with a central wavelength band excellent for phototherapy effect, so that a user can obtain a phototherapy effect while watching an image at the same time.

The display device according to an embodiment of the present invention collects/analyzes the user's biological rhythm through an IoT sensor worn by the user or an IoT sensor attached to the user, and provides a function that provides an awakening effect to the user or improves the user's sleep. It can provide functions to correct disturbed biorhythms, such as non-disruptive functions.

The display device may be a flat panel display device such as an OLED, TFT-LCD, PDP, or LED display, but is not limited thereto and may be a variety of devices that receive an image signal and display a corresponding image. The display device may be an electronic device itself, such as a smart phone, tablet PC, laptop PC, monitor, TV, etc., or may be a component for displaying images of the electronic devices.

1 is a block diagram showing the configuration of a display device according to an embodiment of the present invention.

Referring to FIG. 1 , the display device 1 includes a control unit 10, a gate driver 20, a data driver 30, a power supply unit 40, and a display panel 50.

The control unit 10 may receive an image signal (RGB) and a control signal (CS) from the outside. The image signal (RGB) may include a plurality of grayscale data. The control signal CS may include, for example, a horizontal synchronization signal, a vertical synchronization signal, and a main clock signal.

The control unit 10 processes the image signal (RGB) and control signal (CS) to suit the operating conditions of the display panel 50, and generates image data (DATA), gate driving control signal (CONT1), and data driving control signal ( CONT2) and power supply control signal (CONT3) can be generated and output.

The gate driver 20 may be connected to the pixels PX of the display panel 50 through a plurality of gate lines GL1 to GLn. The gate driver 20 may generate gate signals based on the gate drive control signal CONT1 output from the controller 10. The gate driver 20 may provide the generated gate signals to the pixels PX through the plurality of gate lines GL1 to GLn.

The data driver 30 may be connected to the pixels PX of the display panel 50 through a plurality of data lines DL1 to DLm. The data driver 30 may generate data signals based on the image data DATA and the data drive control signal CONT2 output from the controller 10. The data driver 30 may provide the generated data signals to the pixels PX through the plurality of data lines DL1 to DLm.

The power supply unit 40 may be connected to the pixels PX of the display panel 50 through a plurality of power lines PL1 and PL2. The power supply unit 40 may generate a driving voltage to be provided to the display panel 50 based on the power supply control signal CONT3. The driving voltage may include, for example, a high potential driving voltage (ELVDD) and a low potential driving voltage (ELVSS). The power supply unit 40 may provide the generated driving voltages ELVDD and ELVSS to the pixels PX through the corresponding power lines PL1 and PL2.

A plurality of pixels PX (or referred to as sub-pixels) are disposed on the display panel 50. For example, the pixels PX may be arranged in a matrix form on the display panel 50.

Each pixel (PX) may be electrically connected to the corresponding gate line and data line. These pixels PX may emit light with a luminance corresponding to the gate signal and data signal supplied through the gate lines GL1 to GLn and the data lines DL1 to DLm.

Each pixel (PX) can display one of the first to third colors. In one embodiment, each pixel PX may display one of red, green, and blue colors. In another embodiment, each pixel PX may display one of cyan, magenta, and yellow. In various embodiments, pixels PX may be configured to display any one of four or more colors. For example, each pixel (PX) may display one of red, green, blue, and white.

The control unit 10, gate driver 20, data driver 30, and power supply unit 40 may each be composed of a separate integrated circuit (IC) or may be composed of an integrated circuit with at least a portion of the integrated circuit. For example, at least one of the data driver 30 and the power supply 40 may be configured as an integrated circuit integrated with the control unit 10.

In addition, in FIG. 1, the gate driver 20 and the data driver 30 are shown as separate components from the display panel 50, but at least one of the gate driver 20 and the data driver 30 is used in the display panel 50. ) may be configured in an in-panel manner, which is formed integrally with the panel. For example, the gate driver 20 may be formed integrally with the display panel 50 according to a gate in panel (GIP) method.

FIG. 2 is a circuit diagram showing an example of the pixel shown in FIG. 1.

FIG. 2 shows a pixel (PXij) connected to the i-th gate line (GLi) and the j-th data line (DLj) as an example.

Referring to FIG. 2 , the pixel PX includes a switching transistor (ST), a driving transistor (DT), a storage capacitor (Cst), and a light emitting element (LD).

The first electrode (eg, source electrode) of the switching transistor (ST) is electrically connected to the j-th data line (DLj), and the second electrode (eg, drain electrode) is connected to the first node (N1). are electrically connected. The gate electrode of the switching transistor (ST) is electrically connected to the ith gate line (GLi). The switching transistor (ST) is turned on when a gate signal of the gate on level is applied to the ith gate line (GLi) and transmits the data signal applied to the jth data line (DLj) to the first node (N1). .

The first electrode of the storage capacitor Cst may be electrically connected to the first node N1, and the second electrode may be configured to receive a high potential driving voltage ELVDD. The storage capacitor Cst may be charged with a voltage corresponding to the difference between the voltage applied to the first node N1 and the high potential driving voltage ELVDD.

The first electrode (eg, source electrode) of the driving transistor (DT) is configured to receive the high potential driving voltage (ELVDD), and the second electrode (eg, drain electrode) is configured to receive the high potential driving voltage (ELVDD). 1 is electrically connected to an electrode (e.g., anode electrode). The gate electrode of the driving transistor DT is electrically connected to the first node N1. The driving transistor DT is turned on when a gate-on level voltage is applied through the first node N1, and controls the amount of driving current flowing through the light-emitting device LD in response to the voltage provided to the gate electrode. You can.

The light emitting device LD outputs light corresponding to the driving current. The light emitting device LD can output light corresponding to any one of red, green, and blue. The light emitting device (LD) may be an organic light emitting diode (OLED) or an ultra-small inorganic light emitting diode having a size ranging from micro to nano scale, but the present invention is not limited thereto. Hereinafter, the technical idea of the present invention will be described with reference to an embodiment in which the light emitting device LD is composed of an organic light emitting diode.

In the present invention, the structure of the pixels PX is not limited to that shown in FIG. 2. Depending on the embodiment, the pixels PX have at least a voltage for compensating the threshold voltage of the driving transistor DT or initializing the voltage of the gate electrode of the driving transistor DT and/or the voltage of the anode electrode of the light emitting device LD. It may include one more element.

Although FIG. 2 shows an example in which the switching transistor (ST) and the driving transistor (DT) are NMOS transistors, the present invention is not limited thereto. For example, at least some or all of the transistors constituting each pixel PX may be configured as PMOS transistors. In various embodiments, the switching transistor (ST) and driving transistor (DT) are each implemented as a low temperature poly silicon (LTPS) thin film transistor, an oxide thin film transistor, or a low temperature polycrystalline oxide (LTPO) thin film transistor. It can be implemented.

Figure 3 is a block diagram of the control unit 10 according to an embodiment of the present invention.

The control unit 10 according to an embodiment of the present invention includes a health profile creation module 11, a biometric health confirmation unit 12, and a display control unit 13.

The health profile creation module 11 collects the user's biorhythm through the IoT sensor 70 worn by the user or attached to the user, analyzes it, and generates a temporary user health profile (A). The IoT sensor 70 can detect the user's melatonin, cortisol, and core body temperature.

In theory, all changes that occur in our body that have a biological rhythm can be measured and the circadian rhythm can be evaluated based on this. Clinically applicable circadian rhythm evaluation methods can be assessed, for example, by measuring melatonin and cortisol concentrations and core body temperature.

Melatonin is a natural hormone produced by the pineal gland in the brain and plays a role in setting and controlling the clock by controlling the body's natural rhythm. Thanks to melatonin, which is secreted from the pineal gland every night, we can fall asleep comfortably. Melatonin is made in two steps from its precursor, serotonin. Just as you sleep better when you turn off the lights, when the light coming in decreases, melatonin that has already been made and stored is secreted into the blood. In the morning, the amount of melatonin in the blood decreases, so you wake up and start getting active. This melatonin induces sleep, and it is known that when blue light (center wavelength is approximately 460 nm) is recognized by the human body, the secretion of melatonin is suppressed.

Cortisol is a hormone produced in the adrenal cortex that actually functions to restore the body. When the human body is stimulated, it creates a force to counteract the stimulus and additionally secretes amino acids from the muscles, glucose from the liver, and fatty acids from adipose tissue to recover the consumed energy. The lowest point in blood cortisol concentration is usually observed at midnight, and the highest point is observed around 9 a.m. Cortisol levels begin to gradually rise 2-3 hours after falling asleep, and gradually increase until they peak at 9 a.m. In other words, it decreases during the day, but begins to increase at night and reaches its maximum level around the time you wake up in the morning.

Core body temperature is determined by the interaction between heat production and heat loss within the body. Typically, at night, blood vessels dilate and heat loss increases, causing core body temperature to drop. In the morning, heat production begins and core body temperature rises. There are reports that bedtime and sleep time are related to core body temperature, and in particular, sleep occurs at the moment when core body temperature drops rapidly.

Since the concentrations of melatonin and cortisol and changes in core body temperature are related to sleep, biological rhythms can be identified by measuring the concentrations of melatonin and cortisol and changes in core body temperature.

The biometric health verification unit 12 checks whether there is an abnormality in the user health temporary profile A created by the health profile creation module 11 and generates the user health permanent profile C. Specifically, the biometric health verification unit 12 compares the user's temporary health profile (A) with the previously stored health profile (B) of a normal person.

And, if the difference between the user's temporary health profile (A) and the health profile (B) of a normal person exceeds the standard value, it is determined that there is an abnormality in the user's temporary health profile (A), and the user's temporary health profile (A) is stored in the pre-stored health profile. It is replaced with a normal person's health profile (B) and created as a user's regular health profile (C). If there is an abnormality in the user's temporary health profile (A), there is a temporary abnormality in the user's biological rhythm, or there is an error in the user's biological rhythm information collected through the IoT sensor 70.

If the difference between the user's temporary health profile (A) and the health profile (B) of a normal person is less than or equal to the reference value, the biometric health verification unit 12 determines that the user's health temporary profile (A) generated by the health profile creation module 11 has an abnormality. It is determined that there is no user health profile (A) and the user health permanent profile (C) is created.

The user health constant profile (C) generated by the biometric health confirmation unit 12 is transmitted to the display control unit 13, and the display control unit 13 controls the display device 1 based on the user health constant profile (C). do.

The display control unit 13 generally controls the image display of the display device 1. According to one embodiment of the present invention, the display control unit 13 can set the display mode of the display device 1. The display modes include viewing mode (m1), non-viewing mode (m2), and optimal viewing mode (m3), and viewing mode (m1) is further divided into treatment-oriented mode (mm1) and image quality-oriented mode (mm2). A detailed description of the display mode will be provided later.

The display control unit 13 selects a sub-pixel rendering algorithm according to the display mode and converts red, green, and blue input data (r, g, b) input from an external device into a first output corresponding to the sub-pixel structure (array). It can be converted into data (R1, G1, B1) and second output data (R2, G2, B2). The first output data (R1, G1, B1) is displayed in the first pixel (L1), and the second output data (R2, G2, B2) is displayed in the second pixel (L2). Output data may include luminance information of subpixels. The luminance may have a 1024 (10 bit, 2 ¹⁰ ) gray level, a 256 (8 bit, 2 ⁸ ) gray level, or a 64 (6 bit, 2 ⁶ ) gray level.

The display control unit 13 receives input data from an external device and generates output data by converting the input data according to the display mode. The display control unit 13 outputs output data to the data driver 30, and the data driver 30 converts the output data into a data signal and applies it to the display panel 50. The input data is gradation (gray level) data of red, green, and blue, respectively. The output data is grayscale data converted by sub-pixel rendering of the input data according to the pixel structure (pixel array).

The relational expressions between the input data (r, g, b), the first output data (R1, G1, B1), and the second output data (R2, G2, B2) are as shown in [Equations 1 and 2].

x is a weight value for the first output data (R1, G1, B1) displayed in the first pixel (L1), and y is the second output data (R2, G2, B2) displayed in the second pixel (L2) This is the weight value for .

And, p1, p2, and p3 are weight values for red (r), green (g), and blue (b) subpixels, respectively.

The display control unit 13 applies a gamma function to input data that is grayscale data according to Equations 1 and 2, converts it to luminance data, renders subpixels, applies an inverse gamma function to the rendered luminance data, and converts it to grayscale data. By converting, first and second output data can be generated.

FIG. 4 is a diagram schematically showing the amount of energy depending on the wavelength of light displayed by the first pixel (L1) and the second pixel (L2).

The display device 1 according to an embodiment of the present invention includes two types of pixels, a first pixel (L1) and a second pixel (L2), having different center wavelengths. The light output from one sub-pixel (R1, G1, or B1) of the first pixel (L1) is different from the light output from the corresponding sub-pixel (R2, G2, or B2) of the second pixel (L2). It has a different central wavelength.

For example, as shown in Figure 4 (a), the center wavelength of the second pixel L2 may be different from that of the first pixel L1 only in the blue sub-pixel. The blue sub-pixel of the first pixel (L1) emits first blue light with a center wavelength far from 460 nm, and the blue sub-pixel of the second pixel (L2) emits second blue light with a center wavelength close to 460 nm. can do. For example, the blue sub-pixel of the first pixel (L1) may emit dark blue (deep blue) light, and the blue sub-pixel of the second pixel (L2) may emit bright blue (sky blue) light. The central wavelength of the first blue light may be shorter than the central wavelength of the second blue light. The central wavelength of the first blue light may be between 425 nm and 435 nm, and the central wavelength of the second blue light may be between 450 nm and 470 nm. For example, the blue sub-pixel of the first pixel (L1) and the blue sub-pixel of the second pixel (L2) may be formed so that the central wavelength of the first blue light is 430 nm and the central wavelength of the second blue light is 460 nm.

Additionally, as shown in FIG. 4(b), the center wavelength of the second pixel L2 may be different from that of the first pixel L1 only in the green sub-pixel.

Additionally, as shown in FIG. 4(c), the center wavelength of the second pixel L2 may be different from that of the first pixel L1 only in the red sub-pixel.

In addition, as shown in FIG. 4(d), the blue, green, and red sub-pixels of the second pixel (L2) are the centers of the sub-pixels corresponding to the blue, green, and red sub-pixels of the first pixel (L1), respectively. Wavelengths may be different.

The light emitted from the first pixel L1 has a small effect on the biological rhythm, but the light emitted from the second pixel L2 has a large effect on the biological rhythm and can have a phototherapy effect. Light therapy reduces physical stress and improves health, mood, behavior and learning.

The display device of the present invention emits blue and green lights with short wavelengths, which are very effective in controlling the production of melatonin, and when necessary, irradiates red light for the purpose of limited treatment at a certain time to control the production of melatonin and irradiate the eye for treatment purposes. It is formed to irradiate light to provide maximized treatment effect. By appropriately controlling the production of melatonin, it can provide improved therapeutic effects in treating depression, overcoming sleep disorders, and preventing aging.

In the display device 1 according to one embodiment, the light emitted from the blue sub-pixel of the first pixel (L1) has a weak melatonin suppression effect because the center wavelength is away from 460 nm, but the blue sub-pixel of the second pixel (L2) has a weak melatonin suppression effect. The light emitted from has a central wavelength close to 460 nm, so it has the effect of suppressing the secretion of melatonin.

The display device 1 according to one embodiment can provide a function of awakening the user or inducing the user to sleep by appropriately driving two types of blue sub-pixels according to the display mode. The light emitted from the blue sub-pixel of the first pixel L1 has little effect on the secretion of melatonin and does not disturb the user's sleep. And the light emitted from the blue sub-pixel of the second pixel (L2) suppresses the secretion of melatonin and generates the effect of awakening the user.

As described above, the display control unit 13 can set the display mode of the display device 1, and the display modes include viewing mode (m1), non-viewing mode (m2), and optimal viewing mode (m3). (m1) specifically includes a treatment-focused mode (mm1) and an image quality-focused mode (mm2). The display control unit 13 may set the display mode of the display device 1 based on the user's constant health profile C.

In the case of viewing mode (m1), the display control unit 13 applies different weights to the input data (r, g, b) to create first output data (R1, G1, B1) and second output data (R2, G2). , B2).

The non-viewing mode (m2) is when the display device 1 maximizes the light therapy function. In the case of non-viewing mode (m2), the display control unit 13 ignores image data input from an external device and sets r, g, and b to the maximum gray level value (255 based on 8-bit data) to maximize the phototherapy function. use. In the non-viewing mode (m2), either the first pixel (L1) or the second pixel (L2) does not output an image. That is, at least one of the first output data (R1, G1, B1) and the second output data (R2, G2, B2) has a value of 0. As a result, in the non-viewing mode (m2), the display device 1 does not display image data input from an external device, but only displays a single color image.

The optimal viewing mode (m3) is a mode in which the display device 1 minimizes the phototherapy function and provides optimal image viewing to the user, and is when the display control unit does not convert the input data (r, g, b). That is, in the optimal viewing mode (m3), the input data (r, g, b), the first output data (R1, G1, B1), and the second output data (R2, G2, B2) are the same.

The relational expressions between the input data (r, g, b), the first output data (R1, G1, B1), and the second output data (R2, G2, B2) are as in [Equations 1 and 2], and the display mode Accordingly, the display control unit 13 converts blue input data (r, g, b) into first output data (R1, G1, B1) corresponding to the subpixel structure (array) according to the algorithm parameters of [Table 1]. and converted into second output data (R2, G2, B2).

The combination of parameters x, y, p1, p2, and p3 presented in [Table 1] is only an example and can be determined empirically, and is not necessarily limited to the examples presented in [Table 1].

5 to 8 are diagrams for explaining the arrangement of the first pixel L1 and the second pixel L2 disposed on the display panel 50.

The display device 1 according to an embodiment of the present invention includes two types of pixels, a first pixel (L1) and a second pixel (L2), having different center wavelengths. The first pixel (L1) and the second pixel (L2) may have various arrangement shapes in the display panel 50, and FIGS. 5 to 8 are only examples, and the first pixel (L1) and the second pixel (L2) of the present invention The arrangement structure of the second pixel L2 is not limited to this.

The embodiment of FIG. 5 has a structure in which the first pixel L1 and the second pixel L2 are arranged to cross each other in the up-down, left-right directions. In this embodiment, the first pixel (L1) and the second pixel (L2) are arranged uniformly, so that the user feels the color The difference may be relatively small.

The embodiment of FIG. 6 has a structure in which the first pixel (L1) is disposed in the center of the display panel 50, and the second pixel (L2) is disposed in the outer portion.

The embodiment of FIG. 7 has a structure in which the first pixel (L1) is repeatedly arranged in the first row, and the second pixel (L2) is repeatedly arranged in the second row.

The embodiment of FIG. 8 has a structure in which the first pixel (L1) is repeatedly arranged in the first row, and the second pixel (L2) is repeatedly arranged in the second row.

When the first pixel L1 is disposed at the center of the display panel 50 and the second pixel L2 is disposed at the outer portion, as in the embodiment of FIG. 6 , or as in the embodiment of FIG. 7 or FIG. 8 Similarly, when the first pixel (L1) and the second pixel (L2) are arranged alternately in one column or one row, there is an advantage in that the manufacturing process of the display panel 50 is easy.

Hereinafter, how to implement the first pixel L1 and the second pixel L2 having different center wavelengths in the display panel 50 will be described with reference to FIGS. 9 to 19.

Figure 9 is a cross-sectional view of the pixel structure when the display panel according to an embodiment of the present invention is made of RGB OLED elements.

OLED devices generate excitons (excitations) during the excitation process when holes and electrons injected from the first electrode (e.g., anode) and the second electrode (e.g., cathode) recombine in the light emitting layer (EML). ) is formed and emits light due to the energy from the exciton. OLED displays images by electrically controlling the amount of light generated from the light emitting layer (EML). The RGB OLED method independently forms sub-pixels corresponding to red, green, and blue. Depending on the material used in the emitting layer (EML), colors of red (R), green (G), and blue (B) can be achieved.

The central wavelength of light emitted by an OLED device is determined by the energy band gap of the light emitting layer (EML). The energy band gap is determined by the material of the emitting layer (EML). In an OLED device according to an embodiment, the material of the light emitting layer (EML) forming the sub-pixel of the second pixel (L2) is formed differently from the material of the light emitting layer (EML) forming the sub-pixel of the corresponding first pixel (L1). Therefore, the display device 1 according to an embodiment of the present invention is configured to include two types of pixels with different center wavelengths.

Depending on the material used in the emitting layer (EML), the green, red, and blue emission wavelengths are determined. The structure of the light-emitting layer mainly uses a host/dopant system, which is a system in which excitons generated in the host transition to a dopant and emit light, rather than a single material, to improve color purity and efficiency characteristics. Here, the host is the main material of the light emitting layer, and the dopant is a secondary material added to the host. At this time, various light-emitting colors can be realized depending on the unique wavelength of the organic material applied to the light-emitting layer, and the composition ratio of the host and dopant is adjusted according to the light-emitting characteristics of the desired device.

Generally, a host has a high energy gap, and excitons formed in the host transfer energy to a dopant with a lower energy gap.

The host material may be a material that emits a color with a wavelength shorter than red, for example, a green host material or a blue host material. Among these, it may be a green host material closer to the red wavelength region. The dopant material may be a red dopant material or a green dopant material that emits a color with a wavelength shorter than red.

The display device 1 according to an embodiment of the present invention is provided with two types of pixels having different center wavelengths, and the dopant material of the light emitting layer (EML) forming the sub-pixel of the second pixel (L2) is used to correspond to the dopant material. The dopant material of the light emitting layer (EML) forming the sub-pixel of the first pixel (L1) was formed differently. Unlike the dopant, the host material does not necessarily have to be different between the sub-pixels of the second pixel (L2) and the corresponding sub-pixels of the first pixel (L1), and depending on selection, the central wavelength at which the sub-pixels emit light may be different even if they are the same. .

FIG. 10 is a cross-sectional view of a pixel structure when a display panel according to another embodiment of the present invention is made of RGB OLED elements, and FIG. 11 is a top view.

10 and 11, a color conversion layer was added to make the center wavelength of the blue sub-pixel of the second pixel (L2) different from the center wavelength of the first pixel (L2). The color conversion layer can be implemented as a QD (quantum dot) film or nanocell.

FIG. 12 is a cross-sectional view of a pixel structure when a display panel according to another embodiment of the present invention is made of a WOLED element, and FIG. 13 is a top view.

The WOLED method is a method that reproduces color by installing a color filter (C/F) on a monochromatic (white) OLED device and transmitting white light. The WOLED method and the aforementioned RGB OLED method can be distinguished by the difference in whether or not the OLED device directly implements color.

In the WOLED method, the light emitting layer (EML) material formed in all sub-pixels is composed of the same material, so all OLED elements emit the same color, white. And the color is implemented using a color filter. The color filter consists of a red color filter that converts the white light emitted by the OLED of each sub-pixel into red (R), a red color filter that converts it into green (G), and a blue color filter that converts it into blue (B). You can. In the WOLED method, one pixel can be composed of three (R, G, B) or four (R, G, B, W) sub-pixels.

On the other hand, in the RGB OLED method, the OLED element of each sub-pixel directly implements color. R, G, B The light emitting layer (EML) formed in the red (R) sub-pixel is a red light-emitting layer that emits red wavelengths, and the material of the light-emitting layer (EML) formed in the green (G) sub-pixels is a green light-emitting layer that emits green wavelengths, and the material is blue. (B) The material of the light emitting layer (EML) formed in the sub-pixel is made of a blue light emitting layer that emits blue wavelengths. As previously mentioned, the color (center wavelength) of the light-emitting layer is determined by the energy band gap of the light-emitting layer (EML), and the energy band gap is determined by the material of the light-emitting layer (EML).

In the RGB OLED method, the material of the emitting layer (EML) must be different for each color (R, G, B) of each sub-pixel, so the manufacturing method is complicated and difficult to apply to large displays. On the other hand, the WOLED method has the advantage of being simpler than the RGB OLED method because the material of the light emitting layer (EML) is the same for each color of each sub-pixel. The WOLED method is widely used in large displays such as TV products.

12 and 13, color conversion is performed to make the center wavelengths of the red, green, blue, and white sub-pixels of the second pixel L2 different from the center wavelengths of the corresponding sub-pixels of the first pixel L2. A color conversion layer was added. The color conversion layer can be implemented as a QD (quantum dot) film or nanocell.

14 to 19 illustrate a case where a display panel according to another embodiment of the present invention is configured as a liquid crystal display (LCD).

In the embodiment of FIG. 14, the color filter (CF) used in the blue sub-pixel of the second pixel (L2) is applied differently to the color filter (CF) used in the blue sub-pixel of the second pixel (L2), The center wavelength of the blue sub-pixel of the pixel (L2) is configured to be different from the center wavelength of the blue sub-pixel of the first pixel (L2). However, if necessary, the color filter (CF) used for the red and green sub-pixels as well as the blue sub-pixel of the second pixel (L2) may be applied differently.

15 to 19, the LEDs constituting the backlight unit (BLU) in the display panel 5 made of LCD are composed of a first LED (L1) and a second LED (L2) having different center wavelengths. You can.

The first LED (L1) may have a different center wavelength from the second LED (L2). For example, the blue light region emitted by the first LED (L1) may emit first blue light distant from 460 nm, and the blue light region emitted by the second LED (L2) may emit blue light close to 460 nm. there is.

The light emitted from the first LED (L1) has a small effect on the biological rhythm, but the light emitted from the second LED (L2) has a large effect on the biological rhythm and can have a phototherapy effect. For example, light emitted from the second LED (L2) may have the effect of suppressing the secretion of melatonin. Light therapy reduces physical stress and improves health, mood, behavior and learning.

The embodiment of FIG. 15 is an example of a backlight unit (BLU) arranged in an edge shape.

16 to 19 are examples of a backlight unit (BLU) arranged in a direct manner.

In the embodiment of Figure 16, the structure of the backlight unit (BLU) is such that the first LED (L1) and the second LED (L2) are arranged to cross each other up and down and left and right. In this embodiment, the first LED (L1) and the second LED (L2) are arranged uniformly, so the color sense felt by the user even when the display device 1 operates in the therapeutic viewing mode (m1, mm1, mm2) The difference may be relatively small.

In the embodiment of Figure 17, the structure of the backlight unit (BLU) is such that the first LED (L1) is disposed in the center and the second LED (L2) is disposed in the outer portion. The light emitted from the second pixel (L2) may have the disadvantage of having lower color quality in expressing an image than the light emitted from the first pixel (L1). However, the second pixel (L2) may be placed on the outside. In this case, the degree to which the user perceives color discomfort can be reduced.

The embodiment of FIG. 18 has a structure in which the first LED (L1) is repeatedly arranged in the first row, and the second LED (L2) is repeatedly arranged in the second row.

The embodiment of FIG. 19 has a structure in which the first LED (L1) is repeatedly arranged in the first row, and the second LED (L2) is repeatedly arranged in the second row.

When the first LED (L1) and the second LED (L2) are arranged in one row or one row as in the embodiment of Figure 7 or Figure 8, the manufacturing process of the backlight unit (BLU) or display panel 50 is easy. There is one advantage.

The embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the claims of the present invention. .

1: Display device
10: control unit
11: Health profile creation module
12: Biological health verification department
13: Display control unit
20: Gate driver
30: data driving unit
40: power supply unit
50: display panel
70: IoT sensor

Claims (23)

A display panel including a plurality of pixels including a first pixel and a second pixel; and
Based on the user health profile, input data (r, g, b) input from an external device and corresponding to each of the plurality of pixels are combined with first output data (R1, G1, B1) displayed on the first pixel. a display control unit that converts second output data (R2, G2, B2) displayed on the second pixel; Including,
The light output from at least one sub-pixel of the first pixel has a different central wavelength from the light output from the corresponding sub-pixel of the second pixel,
The display control unit sets a display mode of the display device based on the user's health profile,
The display mode is
An optimal viewing mode in which the input data (r, g, b), first output data (R1, G1, B1) and second output data (R2, G2, B2) are the same;
A non-viewing mode in which at least one of the first output data (R1, G1, B1) and the second output data (R2, G2, B2) has a value of 0; and
A viewing mode in which input data (r, g, b) is converted into first output data (R1, G1, B1) and second output data (R2, G2, B2) by applying different weights; Including,
In the non-viewing mode, the display control unit ignores the input data (r, g, b) input from an external device, sets r, g, and b as the maximum gray level value (255 based on 8-bit data), and displays the first A video display device characterized in that it is converted into output data (R1, G1, B1) and second output data (R2, G2, B2).
According to paragraph 1,
An image display device, wherein the light output from the blue (B) sub-pixel of the first pixel has a different central wavelength from the light output from the blue (B) sub-pixel of the second pixel.
According to paragraph 1,
An image display device, wherein the light output from the green (G) sub-pixel of the first pixel has a different central wavelength from the light output from the green (G) sub-pixel of the second pixel.
According to paragraph 1,
An image display device, wherein the light output from the red (R) sub-pixel of the first pixel has a different central wavelength from the light output from the red (R) sub-pixel of the second pixel.
According to paragraph 1,
An image display device wherein the central wavelength of light output from the blue (B) sub-pixel of the second pixel is 460 nm to 470 nm.
According to paragraph 1,
The display control unit converts input data (r, g, b) into first output data (R1, G1, B1) displayed on the first pixel and second output data displayed on the second pixel ( A video display device characterized by conversion to (R2, G2, B2).


where x is the weight value for the first pixel, y is the weight value for the second pixel,
p1 is the red (r) subpixel, p2 is the green (g) subpixel, and p3 is the weight value for the blue (b) subpixel.
delete According to paragraph 1,
The video display device is
A video display device further comprising a health profile creation module that collects the user's biorhythm through an IoT sensor (70) attached to the user and analyzes the user's biorhythm to generate a temporary user health profile (A).
According to clause 8,
The image display device includes a biometric health confirmation unit that checks whether there is an abnormality in the temporary user health profile (A) created by the health profile creation module (11),
The biological health verification department
By comparing the user's temporary health profile (A) with the previously stored health profile of a normal person (B),
If the difference exceeds the reference value, the user health temporary profile (A) is replaced with the previously stored health profile of a normal person (B) to create a user health permanent profile (C),
A video display device characterized in that, when the difference is less than a reference value, a user health temporary profile (A) is generated as a user health permanent profile (C).
According to paragraph 1,
An image display device, wherein the first pixel and the second pixel are arranged to cross each other up and down and left and right on the display panel.
According to paragraph 1,
An image display device, wherein the first pixel is disposed at the center of the display panel, and the second pixel is disposed at the outer portion of the display panel.
According to paragraph 1,
An image display device, wherein the pixels are formed by arranging first pixels and second pixels in an alternating row on the display panel.
According to paragraph 1,
An image display device, wherein the pixels are formed by arranging first pixels and second pixels in one row at a time on the display panel.
According to paragraph 1,
The display panel includes OLED elements forming first pixels and second pixels,
The OLED device includes a first electrode, an emitting layer (EML) applied on the first electrode, and a second electrode formed on the emitting layer,
An image display characterized in that the material of the light emitting layer (EML) forming the sub-pixel of the second pixel (L2) is formed differently from the material of the light emitting layer (EML) forming the sub-pixel of the corresponding first pixel (L1). Device.
According to clause 14,
The light emitting layer (EML) includes a host and a dopant added to the host,
Characterized in that the dopant material of the light emitting layer (EML) forming the sub-pixel of the second pixel (L2) is formed differently from the dopant material of the light emitting layer (EML) forming the sub-pixel of the corresponding first pixel (L1). Video display device.
According to clause 14,
The light emitting layer (EML) includes a host and a dopant added to the host,
The host material of the light-emitting layer (EML) forming the sub-pixel of the second pixel (L2) is formed to be the same as the host material of the light-emitting layer (EML) forming the sub-pixel of the corresponding first pixel (L1). video display device.
According to paragraph 1,
The display panel includes OLED elements forming first pixels and second pixels,
The display panel includes a color conversion layer, wherein the color conversion layer is formed only in at least one sub-pixel constituting either the first pixel (L1) or the second pixel (L2). A video display device characterized by:
According to paragraph 1,
The display panel consists of a liquid crystal display (LCD),
The color filter (CF) forming the sub-pixel of the second pixel (L2) is formed differently from the color filter (CF) forming the sub-pixel of the corresponding first pixel (L1), so that the central wavelength of the light output from the sub-pixel An image display device, characterized in that the second pixel (L2) and the first pixel (L2) are different.
According to paragraph 1,
The display panel consists of a liquid crystal display (LCD),
The LED constituting the backlight unit (BLU) in the display panel is a video display device characterized in that it is composed of a first LED and a second LED having different center wavelengths.
According to clause 19,
In the display panel, the backlight unit (BLU) is arranged directly,
An image display device, wherein the first LED and the second LED are arranged to cross each other up and down and left and right on a display panel.
According to clause 19,
In the display panel, the backlight unit (BLU) is arranged directly,
An image display device, wherein the first LED is disposed in the center of the display panel, and the second LED is disposed in the outer portion of the display panel.
According to clause 19,
In the display panel, the backlight unit (BLU) is arranged directly,
An image display device, characterized in that it is formed by arranging first LEDs and second LEDs in alternating rows on the display panel.
According to clause 19,
In the display panel, the backlight unit (BLU) is arranged directly,
An image display device, characterized in that it is formed by arranging first LEDs and second LEDs in alternating rows on the display panel.

Images