TWI738509B - Near-eye display device and color discrimination enhancement method thereof - Google Patents

Abstract

A near-eye display device includes a light sensor, a color changing film, an enable signal generator and a display. The light sensor is used to sense an ambient light intensity to generate a light intensity information. The color changing film receives an image light beam. The color changing film is activated according to an enable signal to reduce a radiation energy of the image light beam between a setting spectrum range to generate an adjusted image light beam. The enable signal generator is used to generate the enable signal. The display is coupled to the light sensor, receives the adjusted image light beam and the light intensity information, and adjust a light intensity of the adjusted image light beam to generate a display image according to the light intensity information.

Description

Near-eye display device and method for enhancing color recognition

The present invention relates to a near-eye display device and a method for enhancing its color recognition, and more particularly to a near-eye display device capable of maintaining display quality and a method for enhancing its color recognition.

Nowadays, methods to improve the color recognition ability of people with abnormal color vision include: lighting, glasses, and image enhancement. Among them, the current spectacle type adopts a passive color filter method, which can reduce the spectral radiant energy that can cause confusion for the person with abnormal color vision, so as to enable the person with abnormal color vision to distinguish the color that was originally easy to be confused. However, the spectral radiant energy of the glasses in the form of passive color filters entering the eyeball in any scene will be quantitatively attenuated, resulting in poor visual effects in dim scenes and increasing the risk of hidden harm.

The present invention provides a near-eye display device and a method for enhancing color recognition, which can improve color recognition under the premise of maintaining the brightness of a display screen.

The near-eye display device of the present invention includes a light sensor, a color changer, an actuation signal generator, and a display. The light sensor is used to sense the ambient light intensity to generate light intensity information. The color changer is used to receive the image beam. The color changer is activated according to the actuation signal to reduce the radiation energy of the set spectral range in the image beam, and generate the adjusted image beam. The actuation signal generator is used to generate an actuation signal. The display is coupled to the light sensor. The display receives the adjusted image light beam and light intensity information, and adjusts the light intensity of the adjusted image light beam according to the light intensity information to generate a display image.

The color recognition enhancement method of the present invention includes: sensing the intensity of ambient light to generate light intensity information; according to the actuation signal to activate the color changer to reduce the radiation energy of the set spectral range in the image beam, and generate the adjusted image beam; The adjusted image beam and light intensity information are received, and the light intensity of the adjusted image beam is adjusted according to the light intensity information to generate a display image.

Based on the above, the present invention detects the intensity of the ambient light to perform an appropriate compensation action when the brightness of the image beam decreases when the color changer is activated. In this way, the display can generate a display image with sufficient light intensity, and complete the action of enhancing the user's color recognition without reducing the display quality.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a near-eye display device according to an embodiment of the present invention. The near-eye display device 100 includes a color changing sheet 110, a display 120, a light sensor 130, and an actuation signal generator 140. The color changing sheet 110 is used to receive the image beam IMGB provided by the external environment, and to receive the motion signal EUS. The color changing plate 110 is activated according to the received activation signal EUS, and is used to reduce the radiation energy of a set spectral range in the image beam IMGB, and accordingly generate the adjusted image beam TIMGB.

On the other hand, the color changing plate 110 is coupled to the actuation signal generator 140, wherein the actuation signal generator 140 is used to generate the actuation signal EUS. When the near-eye display device 100 needs to perform an enhancement action of color recognition, the activation signal generator 140 can be used to provide an activation signal EUS, and the color changer 110 can be activated according to the activation signal EUS to set the spectrum. Reduce the range of radiant energy.

The light sensor 130 is used to sense the ambient light intensity of the environment where the near-eye display device 100 is located. The light sensor 130 generates light intensity information LI according to the sensing result. The light sensor 130 also provides light intensity information LI to the display 120. Here, the intensity of the ambient light is substantially the same as the brightness of the image beam IMGB provided by the external environment.

In addition, the adjusted image beam TIMGB is projected to the display 120. The display 120 adjusts the light intensity of the adjusted image beam TIMGB according to the light intensity information LI, and generates a display image DSPM accordingly. The display 120 also provides a display image DSPM to the user USR.

Please note here that, in the embodiment of the present invention, the setting action of setting the spectral range can be performed according to the overlapping range of the wavelength range of a first visible color light and the wavelength range of a second visible color light. Please refer to FIG. 2 for a schematic diagram of the spectrum of the adjusted image beam according to the embodiment of the present invention. In FIG. 2, curves 210, 220, and 230 respectively depict spectrograms of three different visible colors (blue light, red light, and green light). The set spectral range RG can be set according to the overlapping range of the red light and green light wavelength ranges, and through the function of the color changer 110, the radiation energy of the red light and green light in the set spectral range RG (such as curve 220, 230). And to complete the correction of red and green color blindness.

Please refer to FIG. 1 again. Due to the reduction action of the radiation energy of the color changing plate 110, the light intensity of the image beam TIMGB after adjustment will be reduced. In contrast, in the near-eye display device 100 of this embodiment, the light sensor 130 generates light intensity information LI by sensing the ambient light intensity, and the display 120 adjusts the image beam TIMGB according to the light intensity information LI. The light intensity is compensated (enhanced) action. Therefore, the display 120 can generate a display image DSPM with sufficient light intensity to effectively improve the display quality.

Incidentally, in the embodiment of the present invention, the color changing sheet 110 may be a photochromic sheet, an electrochromic sheet or a thermochromic sheet. When the color changing film 110 can be a photochromic film, the actuation signal generator 140 can generate an actuation signal EUS as a light signal to activate the color changing film 110; when the color changing film 110 can be a thermochromic film, The actuation signal generator 140 can generate an actuation signal EUS as a thermal signal, and thereby activate the color change sheet 110; when the color change sheet 110 can be an electrochromic sheet, the actuation signal generator 140 can generate an actuation signal as an electric signal. The signal EUS is activated, and the color-changing film 110 is thereby activated.

Incidentally, the light sensor 130 of the embodiment of the present invention may be a camera, or may be any device known to those skilled in the art to detect light intensity, and there is no particular limitation.

Please refer to FIG. 3 below. FIG. 3 is a schematic diagram of a near-eye display device according to another embodiment of the present invention. The near-eye display device 300 includes a color changing sheet 310, a display 320, a light sensor 330, an actuation signal generator 340, and a light blocker 350. The light blocker 350, the color changing sheet 310, and the display 320 can be arranged in a tube in parallel in sequence and interposed between the image beam IMG provided by the outside and the user USR.

In this embodiment, the light sensor 330 is used to sense the ambient light intensity to generate light intensity information LI. The light blocker 350 receives the image beam IMGB and is used to block at least one set wavelength component in the image beam IMGB. In this embodiment, the light blocker 350 can block at least one of the infrared light component and the ultraviolet light component in the image beam IMGB.

In addition, the color changing sheet 310 in this embodiment is a photochromic sheet. The actuation signal generator 340 can be an ultraviolet light emitter for sending an actuation signal EUS which is ultraviolet light to the color changing plate 310, and the color changing plate 310 is activated to reduce the radiation of a set spectral range in the image beam IMGB Energy, and generate the adjusted image beam TIMGB; among them, the corresponding color-changing film 310 can be selected to correspond to the color weak state of the user's USR, and by reducing the radiant intensity of the user's USR easily confused spectral range, the color weak state of the user's USR can be made Get corrected.

The display 320 receives the adjusted image beam TIMGB, and receives the light intensity information LI. The display 320 adjusts the light intensity of the adjusted image beam TIMGB according to the light intensity information LI to generate a display image DSPM. The display image DSPM is transmitted to the eyeball of the user USR, and the user can observe the correct colors in the display image DSPM.

In the embodiment of the present invention, since the color changing plate 310 additionally receives the actuation signal EUS which is ultraviolet light, in order to maintain the display quality of the displayed image DSPM, the display 320 may also have a function of removing ultraviolet light to enable the actuation signal EUS Eliminate the impact of DSPM on the displayed image.

In addition, when the user USR does not need to perform corrective actions for abnormal color discrimination, the color changing plate 310 can be prevented from performing the radiation energy of the set spectral range by stopping the generation of the actuation signal EUS of the actuation signal generator 340. The lowering action. At the same time, the display 320 may also not perform the function of removing ultraviolet light.

Incidentally, the near-eye display device 300 in the embodiment of the present invention can be applied to display Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). ) Image display effect.

Please refer to FIG. 4. FIG. 4 is a flowchart of a method for enhancing color recognition according to an embodiment of the present invention. In step S410, the ambient light intensity is sensed to generate light intensity information. And in step S420, the color changing plate is activated according to the actuation signal to reduce the radiation energy of a set spectral range in the image light beam received by the color changing plate, and to generate an adjusted image light beam. In step S430, the adjusted image beam and light intensity information are received, and the light intensity of the adjusted image beam is adjusted according to the light intensity information to generate a display image. The step S430 can be used to increase the light intensity of the displayed image, which is reduced by the color changing film, so as to maintain the image brightness of the displayed image, and to enhance the brightness range of the image in a timely manner.

The implementation details of the foregoing steps have been described in detail in the foregoing multiple embodiments, and will not be repeated here.

In summary, the present invention corresponds to the different states and degrees of abnormal discoloration power of different users, and suitable color changing films can be set, and the radiation energy of the set spectral range can be adjusted by adjusting the transmittance of the color changing films. The light intensity of the image beam. Then, through the detection action of the ambient light intensity, the brightness of the displayed image can be appropriately compensated to maintain the quality of the display.

100, 300: Near-eye display device

110, 310: discoloration film

120, 320: display

130, 330: light sensor

140, 340: actuation signal generator

350: Light Blocker

210, 220, 230: curve

RG: set the spectral range

EUS: actuation signal

LI: light intensity information

IMGB: image beam

TIMGB: Adjusted image beam

USR: User

DSPM: Display image

S410~S430: steps

FIG. 1 is a schematic diagram of a near-eye display device according to an embodiment of the invention. FIG. 2 is a schematic diagram of the spectrum of the adjusted image beam according to the embodiment of the present invention. FIG. 3 is a schematic diagram of a near-eye display device according to another embodiment of the invention. FIG. 4 shows a flowchart of a method for enhancing color recognition according to an embodiment of the present invention.

100: Near-eye display device

110: color changing film

120: display

130: light sensor

140: actuation signal generator

EUS: actuation signal

LI: light intensity information

IMGB: image beam

TIMGB: Adjusted image beam

USR: User

DSPM: Display image

Claims (10)

A near-eye display device includes: a light sensor for sensing the intensity of an ambient light to generate light intensity information; a color changing plate for receiving an image beam, which is activated to reduce the The radiation energy of a set spectral range in the image beam generates an adjusted image beam; an actuation signal generator for generating the actuation signal; and a display coupled to the light sensor to receive the adjusted image The light beam and the light intensity information adjust the light intensity of the adjusted image beam according to the light intensity information to generate a display image. The near-eye display device according to claim 1, further comprising: a light blocker, which receives the image light beam and blocks at least one set wavelength component in the image light beam. The near-eye display device according to claim 1, wherein the actuation signal is an optical signal, a thermal signal, or an electrical signal. The near-eye display device according to claim 2, wherein the light blocker is used to block at least one of the ultraviolet light component and the infrared light component of the image beam. The near-eye display device according to claim 1, wherein the set spectral range is set according to a range in which a wavelength range of a first visible color light overlaps with a wavelength range of a second visible color light. A method for enhancing color recognition, applicable to the near-eye display device according to any one of claims 1 to 5, includes: sensing an ambient light intensity to generate light intensity information; The color changer reduces the radiant energy of a set spectral range in an image beam, and generates an adjusted image beam; and receives the adjusted image beam and the light intensity information, and adjusts the adjusted image beam according to the light intensity information Light intensity to produce a display image. The enhancement method according to claim 6, wherein before the step of activating the color changer according to the activation signal to reduce the radiation energy of the set spectral range in the image beam and generating the adjusted image beam, the method further comprises: Block at least one set wavelength component in the image beam. The enhancement method according to claim 6, wherein the actuation signal is an optical signal, a thermal signal, or an electrical signal. The enhancement method according to claim 7, wherein the step of blocking the at least one set wavelength component in the image beam comprises: blocking at least one of an ultraviolet light component and an infrared light component of the image beam. The enhancement method according to claim 6, wherein the set spectral range is set according to a range in which a wavelength range of a first visible light and a wavelength range of a second visible light overlap.

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