CN111221127B - Near-to-eye display device - Google Patents

Abstract

The invention discloses a near-eye display device, which comprises a display panel and a vibration element, wherein the display panel comprises a plurality of pixels; the vibration element is arranged on the side of the display panel and vibrates to drive the display panel to vibrate, so that the pixels generate reciprocating displacement, wherein the vibration amplitude of the vibration element is less than 100 micrometers.

Description

near-eye display device

technical field

The invention relates to a near-eye display device, in particular to a near-eye display device which reduces the screen door effect.

Background technique

In display devices, display clarity is usually evaluated by whether pixels can be seen visually. When the pixel density is insufficient, visually you will see a dividing line between the pixels, just like looking at things behind a screen window, which is called the "screen-door effect (screen-door effect)". Generally speaking, when the viewing distance between the display device and the user is larger, the number of pixels that the user can see at a fixed viewing angle is larger, making the screen door effect less distinct. However, in the application of near-eye display devices such as virtual reality, the display device is placed almost close to the user's eyes, so that the viewing distance is only a few centimeters, resulting in a significant increase in the number of pixels that can be seen at a fixed viewing angle. reduced, highlighting the problem of the "screen door effect".

The existing technology for improving the screen door effect is to form smaller pixels to increase the number of pixels per unit area. However, smaller pixels must be matched with higher-precision manufacturing technology, such as high-precision photolithography manufacturing technology, which makes the manufacturing process more difficult, the yield rate is not easy to control, and the equipment requirements are relatively high, and the manufacturing cost also decreases. The sudden increase.

Contents of the invention

An object of the present invention is to provide a near-eye display device, which uses vibration to improve the screen window effect, so as to improve the display quality of the existing display panel.

In one embodiment, the present invention provides a near-eye display device, which includes a display panel and a vibrating element, wherein the display panel includes a plurality of pixels; the vibrating element is arranged on the side of the display panel, and the vibrating element vibrates to drive the display panel to vibrate, A plurality of pixels are moved back and forth, wherein the vibration amplitude of the vibration element is below 100 μm.

In one embodiment, the vibration amplitude is less than 50 μm. In another embodiment, the vibration amplitude is less than 10 μm.

In another embodiment, the present invention provides a near-eye display device, which includes a display panel and a vibrating element, wherein the display panel includes a plurality of pixels, and there is a pixel pitch between adjacent pixels; the vibrating element is arranged on the side of the display panel, The vibrating element vibrates to drive the display panel to vibrate, so that the plurality of pixels are displaced, wherein the displacement distance of the plurality of pixels is less than or equal to the pixel pitch.

In one embodiment, the displacement distance is equal to or greater than 1/2 of the pixel pitch.

In one embodiment, the vibration frequency of the vibration element is above 60 Hz. In another embodiment, the vibration frequency of the vibrating element is above 120 Hz.

In an embodiment, the near-eye display device of the present invention further includes a control element, wherein the control element controls the vibration of the vibration element.

In one embodiment, the near-eye display device of the present invention further includes another vibrating element, wherein the other vibrating element is arranged on the other side of the display panel relative to the vibrating element, the vibrating element vibrates along the first direction, and the other vibrating element vibrates along the The second direction vibrates, and the second direction intersects with the first direction.

In one embodiment, the vibrating element and the other vibrating element vibrate alternately, so that the plurality of pixels are alternately displaced in the first direction and the second direction, and the vibrating element and the other vibrating element have the same or different vibration frequencies.

In one embodiment, the near-eye display device of the present invention further includes a lens, wherein the lens is disposed between the display panel and the user.

Compared with the prior art, the near-eye display device of the present invention uses the vibrating element to perform micro-vibration, so that the pixels of the image are displaced correspondingly, so as to produce the effect of pixel blurring, so as to reduce the segmentation phenomenon between image pixels and improve the existing display panel. display quality.

Description of drawings

FIG. 1 is a schematic diagram of a near-eye display device according to an embodiment of the present invention;

2 is a schematic diagram of the operation of a near-eye display device according to an embodiment of the present invention;

3 is a schematic diagram of a near-eye display device according to another embodiment of the present invention;

4A is a schematic diagram of the operation of a near-eye display device according to another embodiment of the present invention;

FIG. 4B is a schematic diagram of viewing images of the near-eye display device of FIG. 4A;

FIG. 5 is a schematic diagram of a near-eye display device according to another embodiment of the present invention.

Symbol Description

10 near-eye display device

20 users

100 display panels

110 pixels

101A, 101B, 101C pixel units

120 light blocking area

200X, 200Y vibration elements

300 control elements

400 lens

500 shell

510 accommodation space

DX, DY displacement distance

WX, WY pixel pitch

Detailed ways

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Throughout the specification, the same reference numerals denote the same elements. It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to a physical and/or electrical connection. Furthermore, when "electrically connected" or "coupled", other elements may exist between two elements.

It should be understood that although the terms "first", "second", "third" etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, and and/or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, "a first element," "component," "region," "layer" or "section" discussed below could be termed a second element, component, region, layer or section without departing from the teachings herein.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include plural forms including "at least one" unless the content clearly dictates otherwise. "Or" means "and/or". As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It should also be understood that when used in this specification, the terms "comprising" and/or "comprising" designate the stated features, regions, integers, steps, operations, the presence of elements and/or parts, but do not exclude one or more Existence or addition of other features, regions as a whole, steps, operations, elements, parts and/or combinations thereof.

Additionally, relative terms such as "lower" or "bottom" and "upper" or "top" may be used herein to describe one element's relationship to another element as shown in the figures. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. Thus, the exemplary term "below" can encompass both an orientation of "below" and "upper," depending on the particular orientation of the drawing. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "below" or "beneath" can encompass both an orientation of above and below.

As used herein, "about," "approximately," or "substantially" includes stated values and averages within acceptable deviations from a particular value as determined by one of ordinary skill in the art, taking into account the measurements in question and the relative A specific amount of measurement-related error (ie, a limitation of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Moreover, "about", "approximately" or "substantially" used herein may select a more acceptable deviation range or standard deviation according to optical properties, etching properties or other properties, and may not use one standard deviation to apply to all properties .

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant art and the present invention, and will not be interpreted as idealized or excessive formal meaning, unless expressly so defined herein.

Exemplary embodiments are described herein with reference to cross section illustrations that are schematic illustrations of idealized embodiments. Accordingly, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances are to be expected. Thus, embodiments described herein should not be construed as limited to the particular shapes of regions as illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, a region shown or described as flat, may, typically, have rough and/or non-linear features. Additionally, acute corners shown may be rounded. Thus, the regions shown in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of a region and are not intended to limit the scope of the claims.

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 of the present invention is preferably used close to the user's eyes. For example, the viewing distance between the near-eye display device and the user's eyes is preferably about several centimeters, but not limited thereto. As shown in FIG. 1 , the near-eye display device 10 of the present invention includes a display panel 100 and a vibrating element 200X. The display panel 100 includes a plurality of pixels 110 . The vibrating element 200X is arranged on the side of the display panel 100, and the vibrating element 200X vibrates to drive the display panel 100 to vibrate, so that the multiple pixels 110 move back and forth, wherein the vibration amplitude of the vibrating element 200X is less than 100 μm, so that the multiple pixels 110 have Displacement distance below 100μm. In one embodiment, the vibration amplitude of the vibration element 200X is preferably less than 50 μm, so that the plurality of pixels 110 have a displacement distance of less than 50 μm. In another embodiment, the vibration amplitude of the vibration element 200X is less than 10 μm, so that the plurality of pixels 110 have a displacement distance of less than 10 μm.

Specifically, the display panel 100 includes a plurality of pixel units (such as 101A, 101B, 101C) arranged in an array. Each pixel unit preferably includes multi-color pixels capable of forming a color image. For example, each pixel unit includes three pixels such as red (R), green (G) and blue (B), but not limited thereto. According to actual application, in other embodiments, each pixel unit may include four pixels of red (R), green (G), blue (B) and white (W). Each pixel 110 has a filter or a light emitting layer to provide light of a predetermined color. The light blocking area 120 (such as a black matrix resist) is disposed between adjacent pixels 110 to avoid light mixing between adjacent pixels 110 . In other words, there is a pixel pitch (ie, the width of the light-blocking region 120 ) between adjacent pixels 110 to separate adjacent pixels 110 . For example, as shown in FIG. 1, three pixel units 101A, 101B, and 101C are arranged along the Y-axis direction, and three pixels 110 of red (R), green (G) and blue (B) of each pixel unit Set along the X axis. In the Y-axis direction, there is a pixel pitch WY between adjacent pixels 110 , and in the X-axis direction, there is a pixel pitch WX between adjacent pixels 110 . It should be noted here that the number of pixel units, the number of pixels of each pixel unit and its arrangement can be changed according to actual applications, and are not limited to the examples shown.

The vibrating element 200X is preferably a vibrator that can be driven by an electric signal, such as an electromagnetic vibrator or a piezoelectric vibrator, but is not limited thereto. In one embodiment, the vibrating element 200X is preferably any suitable vibrator with a vibration amplitude of less than 100 μm and a vibration frequency of more than 60 Hz. In another embodiment, the vibrating element 200X is preferably any suitable vibrator with a vibration amplitude below 50 μm, or even below 10 μm, and a vibration frequency above 120 Hz. The vibrating element 200X is preferably disposed on a side of the display panel 100 . For example, the vibrating element 200X can be disposed in the middle or corner of the side of the display panel 100 . In other words, the vibrating element 200X is preferably disposed at a peripheral position of the display panel 100 . Furthermore, the vibrating element 200X can be connected to the display panel 100 through any suitable mechanism to drive the display panel 100 to vibrate. For example, the vibrating element 200X can be connected to the display panel 100 through clamping, adhesion, locking, etc., so that when the vibrating element 200X vibrates, the display panel 100 can be driven to vibrate. As shown in FIG. 1 , in this embodiment, at least one vibrating element 200X is disposed on the side of the display panel 100 parallel to the Y-axis direction to drive the display panel 100 to vibrate along the X-axis direction, but not limited thereto. According to the size of the display panel 100 and the used vibrating elements 200X, a plurality of vibrating elements 200X can be arranged in pairs on opposite sides of the display panel 100 to drive the display panel 100 to reciprocate and vibrate toward the opposite sides. Furthermore, the vibration amplitude of the vibration element 200X is preferably determined according to practical applications, such as pixel pitch, which will be described in detail later.

The operation of the near-eye display device of the present invention is described with reference to FIG. 2 , wherein FIG. 2 is a schematic diagram of the operation of the near-eye display device according to an embodiment of the present invention. As shown in FIG. 2 , two vibrating elements 200X are disposed on opposite sides of the display panel 100 along the X-axis direction. When the vibrating element 200X vibrates along the X-axis direction, it drives the display panel 100 to vibrate along the X-axis direction, so that the multiple pixels 110 move back and forth along the X-axis direction. In one embodiment, the displacement distance DX of the plurality of pixels 110 is preferably less than or equal to the pixel pitch WX (ie, DX≦WX), so as to reduce the possibility of light mixing among the pixels 110 . Furthermore, in another embodiment, the displacement distance DX of the plurality of pixels 110 is preferably equal to or greater than 1/2 of the pixel pitch WX (that is, 1/2WX≤DX), so that the displacement of the plurality of pixels 110 effectively covers the light blocking The original location of area 120. For example, for a display panel with a resolution of 386˜615 ppi (pixels per inch), the pixel pitch is about 40˜60 μm, and the image refresh rate is about 60˜120 Hz. Calculated on the basis of an aperture ratio of 10% to 90%, the pixel pitch ranges from about 4 to 56 μm. Therefore, the vibrating element 200X preferably can drive the display panel 100 to vibrate at a frequency above 60 Hz or more preferably above 120 Hz, so that the pixel 110 moves back in the X direction, and the displacement distance is preferably about 4-56 μm or less. Therefore, visually, it is equivalent to expanding the display range of the pixels 110 in the X-axis direction toward the light-blocking area 120 by substantially about the pixel pitch WX, thereby reducing the screen door effect of the image in the X-axis direction.

FIG. 3 is a schematic diagram of a near-eye display device according to another embodiment of the present invention. As shown in FIG. 3 , the near-eye display device of the present invention further includes another vibrating element 200Y. The vibrating element 200Y is disposed on the other side of the display panel 100 relative to the vibrating element 200X, so that the vibrating element 200X vibrates along a first direction (for example, the X-axis direction), and the vibrating element 200Y vibrates along a second direction (eg, the Y-axis direction), And the second direction intersects with the first direction. Specifically, the vibrating element 200Y is preferably disposed on the adjacent side of the display panel 100 relative to the vibrating element 200X, for example, disposed on the side of the display panel 100 parallel to the X-axis direction, so as to drive the display panel 100 to vibrate along the Y-axis direction, so that The vibrating elements 200Y and 200X vibrate in substantially orthogonal directions (ie, the first direction is perpendicular to the second direction), so that the pixels 110 of the display panel 100 have a two-dimensional displacement effect. The vibrating elements 200Y and 200X can be the same or different vibrating elements, and the numbers of the vibrating elements 200Y and 200X are not limited to those shown in the embodiment. It should be noted here that the details of the vibrating element 200Y can refer to the related description of the aforementioned vibrating element 200X, and will not be repeated here.

The operation of the near-eye display device of the present invention is described with reference to FIG. 4A , wherein FIG. 4A is a schematic diagram of the operation of the near-eye display device according to another embodiment of the present invention. As shown in FIG. 4A , two vibrating elements 200X are disposed on opposite sides of the display panel 100 along the X-axis direction, and the other two vibrating elements 200Y are disposed on opposite sides of the display panel 100 along the Y-axis direction. When the vibrating element 200X vibrates along the X-axis direction, it drives the display panel 100 to vibrate along the X-axis direction, so that the multiple pixels 110 move back and forth along the X-axis direction. When the vibrating element 200Y vibrates along the Y-axis direction, it drives the display panel 100 to vibrate along the Y-axis direction, so that the multiple pixels 110 move back and forth along the Y-axis direction. In this embodiment, the vibrating element 200X and the vibrating element 200Y preferably vibrate alternately, so that the plurality of pixels 110 are alternately displaced in the first direction (eg, the X-axis direction) and the second direction (eg, the Y-axis direction). For example, one vibration cycle preferably includes two time sequences, wherein in the first time sequence, it is preferable to drive the vibration element 200X to vibrate along the X-axis direction with an electrical signal and not drive the vibration element 200Y to drive the display panel 100 along the X axis. Vibration in the axial direction, so that a plurality of pixels 110 are displaced along the X-axis direction, and the displacement distance DX is preferably less than or equal to the pixel pitch WX and equal to or greater than 1/2 of the pixel pitch WX (that is, 1/2WX≤DX≤WX); In the second sequence, it is preferable to drive the vibrating element 200Y to vibrate along the Y-axis direction with an electric signal and not drive the vibrating element 200X to drive the display panel 100 to vibrate along the Y-axis direction, so that the plurality of pixels 110 are displaced along the Y-axis direction, and the displacement The distance DY is preferably smaller than or equal to the pixel pitch WY and equal to or larger than 1/2 of the pixel pitch WY (ie 1/2WY≤DY≤WY). The vibrating element 200X and the vibrating element 200Y can have the same or different vibrating frequencies, and the vibrating frequency is preferably above 60 Hz, more preferably above 120 Hz. Therefore, it is equivalent to making the display range of the pixel 110 in the X-axis direction expand toward the pixel pitch WX and the display range in the Y-axis direction toward the pixel pitch WY, thereby reducing the screen door effect of the image in the X-axis direction and the Y-axis direction. . As shown in FIG. 4B , since the pixels 110 vibrate rapidly and alternately in the X-axis direction and the Y-axis direction, when the user watches the image 105, the pixel 110 vibrates toward the X-Y axis plane at the same time, which effectively reduces the two-dimensional direction of the image. screen effect.

FIG. 5 is a schematic diagram of a near-eye display device according to another embodiment of the present invention. As shown in FIG. 5 , the near-eye display device of the present invention may further include a control element 300 , wherein the control element 300 controls the vibration of the vibration element (such as 200X and/or 200Y). The control element 300 can be a driver electrically connected to the vibrating element (200X and/or 200Y) to provide a driving signal to the vibrating element (200X and/or 200Y), thereby controlling the vibration amplitude or vibration of the vibrating element (200X and/or 200Y) frequency. In one embodiment, the control element 300 may be integrated with other electrical elements (such as a circuit board) of the near-eye display device or be provided independently.

Moreover, the near-eye display device of the present invention may further include a lens 400 , wherein the lens 400 is disposed between the display panel 100 and the user 20 . The lens 400 is used to magnify the image formed by the display panel 100 and refract the magnified image toward the user's eyes. The lens 400 can be used to increase the viewing angle of the user and adjust the focus. In this way, the image viewed by the user is larger than the image actually displayed on the display panel 100 .

In addition, the near-eye display device of the present invention may further include a casing 500, wherein the casing 500 provides an accommodating space 510 for accommodating components of the near-eye display device, such as the display panel 100, the vibrating elements 200X, 200Y, the control element 300, Lens 400 etc. According to practical applications, the housing 500 may have various suitable forms. For example, the housing 500 may be in a wearable form for the user, such as a frame or a helmet, so that the near-eye display device can be fixed on the head of the user, but not limited thereto. In other embodiments, the casing 500 may have other forms, so that the user can hold the near-eye display device close to the eyes. In addition, the housing 500 can be designed with a fixing mechanism to position the relative positions of the display panel 100 and the vibrating elements 200X, 200Y, so that the vibrating elements 200X, 200Y drive the display panel 100 to vibrate. Moreover, the housing 500 can also be provided with a shock absorbing element, such as shock-absorbing cotton, to reduce the impact of the vibration element on the overall vibration of the near-eye display device, so that when the vibration element drives the display panel to vibrate to reduce the effect of the screen window, the user can actually experience Less than near-eye display device is vibrating.

It should be noted here that the near-eye display device of the present invention is preferably applied in virtual reality display, and may include one display panel or two display panels according to practical applications. When two display panels are used, each display panel preferably has a corresponding vibrating element, but not limited thereto. Moreover, the near-eye display device of the present invention is illustrated by taking the vibration element along the X-axis or the Y-axis direction as an example, but in other embodiments, the vibration element can be arranged at the corner of the display panel to drive the display panel to vibrate obliquely, so that the vibration The included angle between the direction and the X-axis or Y-axis direction is less than 90 degrees.

The near-eye display device of the present invention drives the display panel to vibrate through the vibrating element, so that the reciprocal displacement of the pixels produces the effect of slight vibration; especially, the near-eye display device of the present invention controls the vibration amplitude of the vibrating element so that the displacement of the pixel produces blurred filling The effect of the light-blocking area between pixels will not affect the quality of adjacent pixels (for example, no color shift due to light mixing). Furthermore, the near-eye display device of the present invention produces image vibrations through the vibration of the vibrating element with similar high-frequency simple harmonic motion. When applied to virtual reality display, the visual field is roughly the same as that of the vestibular system, and no virtual reality will occur when viewing. Reality motion sickness.

The present invention has been described by the above-mentioned related embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalent arrangements included in the spirit and scope of the claims are included in the scope of the present invention.

Claims (7)

1. A near-eye display device, characterized in that it comprises: A display panel comprising a plurality of pixels with a pixel pitch between adjacent pixels; A vibrating element is arranged on the side of the display panel, and the vibrating element vibrates to drive the display panel to vibrate so that the plurality of pixels are displaced, wherein the displacement distance of the plurality of pixels is less than or equal to the pixel pitch; and Another vibrating element, wherein the other vibrating element is arranged on the other side of the display panel relative to the vibrating element, the vibrating element vibrates along the first direction, the other vibrating element vibrates along the second direction, and the second vibrating element vibrates along the second direction direction intersects the first direction, Wherein the vibrating element and the other vibrating element vibrate alternately, so that the plurality of pixels move back and forth alternately in the first direction and the second direction. 2. The near-eye display device as claimed in claim 1, wherein the displacement distance is equal to or greater than 1/2 of the pixel pitch. 3. The near-eye display device according to claim 1, wherein the vibration frequency of the vibrating element is above 60 Hz. 4. The near-eye display device according to claim 3, wherein the vibration frequency of the vibrating element is above 120 Hz. 5. The near-eye display device as claimed in claim 1, further comprising a control element, wherein the control element controls the vibration of the vibration element. 6. The near-eye display device as claimed in claim 1, wherein the vibration element and the other vibration element have the same or different vibration frequencies. 7. The near-eye display device as claimed in claim 1, further comprising a lens, wherein the lens is disposed between the display panel and the user.

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