CN103118267A - Display system capable of automatically adjusting display visual angles of three-dimensional images - Google Patents

Abstract

The present invention is a display system for automatically adjusting the viewing angle of a three-dimensional image, which includes: an image capture device, a display and a control device. The display system uses the image capture device to capture images including the position and number of faces of the audience. After the control device receives the images captured by the image capture device, it calculates the center of the display panel of the audience's face relative to the display. The angle of vertical offset and the number of viewers are used to obtain the display angles of 3D images required by each audience with different numbers of viewers, and by synchronously adjusting the display panel and backlight of the display to form 3D images that meet different display angles of view; The pixels of the display panel have an adjustable multi-segment display area, and after the display area of the multi-segment display area is changed, the brightness compensation provided by the backlight can still maintain the original brightness when viewing the display system, thereby improving the viewing comfort of the audience.

Description

Display system that automatically adjusts the viewing angle of 3D image display

technical field

The present invention relates to a display system for automatically adjusting the display angle of a three-dimensional image, in particular to a display system that can automatically adjust the vertical display angle required for a film-type patterned retarder (FPR) three-dimensional display image. Reduce vertical image crosstalk (crosstalk) to meet the viewing comfort of a single audience or multiple audiences.

Background technique

The current thin-film polarized 3D display is composed of two sets of image data of different viewing angles, wherein one set of image data corresponds to the viewing angle of the left eye, and the other set of image data corresponds to the viewing angle of the right eye. When playing a 3D image, adjust the phase setting of the output image through the polarizing structure, so that the left eye of the viewer wearing glasses with a specific polarizing structure can only see the image data corresponding to the left eye angle of view, while the right eye can only see the image data corresponding to the right angle of view. The image data of the eye angle can be used to generate stereoscopic vision in the audience's brain.

As shown in Figure 1, in order to display different polarization images for the left and right eyes, the display panel of the current 3D display usually uses a stripe-type interlaced design pattern retardation film 400, which divides the pixels that the screen can display into odd-numbered rows (odd line) and even line (even line) correspond to the left and right eyes respectively, for example, the odd line pixels L1, L2 and L3 in Figure 1 can be allocated to the left eye, and the even line pixels R1, R2 and R3 can be allocated to the right eye to form two sets of image data with different viewing angles.

The viewer wears glasses with a specific polarizing structure, so that the output display images of the odd-numbered pixels and the output display images of the even-numbered pixels have different phases and are transmitted to the left and right eyes respectively. In this way, the audience can feel the stereoscopic display effect.

Since the image data of the two groups of different viewing angles formed by the pattern retardation film 400 are arranged horizontally in a staggered manner, when the eye position of a single viewer changes vertically relative to the display, or when multiple viewers have different heights or viewing angles, Crosstalk will occur between the two sets of image data of different viewing angles, which will affect the visual comfort of the audience and the image quality of display images; therefore, the current improvement method is shown in Figure 2. Between the pixels, black dye or resin is used to increase the width of the shading area BM between pixels to reduce crosstalk; however, the above method of improving crosstalk cannot change the width of the shading area BM between pixels according to the angle and position of the actual shift of the viewer Therefore, this method will reduce the brightness of the display when the vertical viewing angle is not too large when the front view is not required, but the brightness of the backlight of the display must be increased in advance, which will increase the rated power consumption of the display.

Therefore, there is a need for a display system that can automatically adjust the viewing angle of a 3D image, so that it can automatically adjust to the viewing angle actually required by the audience, and simultaneously adjust and compensate the brightness of the backlight source, so as to improve the above problems.

Contents of the invention

One of the objectives of the present invention is to provide a display system that automatically adjusts the viewing angle of a 3D image display, which can automatically adjust the vertical display viewing angle required for a 3D display image, reduce vertical image crosstalk, and simultaneously adjust and compensate the brightness of the backlight source.

In order to achieve the above object, the display system of the present invention that automatically adjusts the viewing angle of the three-dimensional image display includes an image capture device that captures images including the position and number of faces of the audience; the display includes: a display panel, and pixels of the display panel It has a multi-segment display area, and the display panel includes a display driver module to drive the voltage of the multi-segment display area, so that the multi-segment display area can be adjusted; and a backlight source, which includes a backlight driver module, to drive the voltage of the backlight source, Make the brightness of the backlight source adjustable; and a control device, coupled to the image capture device and the display, respectively, the control device includes: a signal processing module, after receiving the image captured by the image capture device, Calculate the angle of the vertical offset of the viewer's face relative to the center of the display panel and the number of viewers, and convert them into a first electronic signal and a second electronic signal; and a signal output module, respectively output the first electronic signal to the display panel The display driving module, and the backlight driving module that outputs the second electronic signal to the backlight source; wherein, the display driving module regulates the multi-segment display areas of the display panel according to the first electronic signal, so that the display panel generates The vertical display viewing angle of the three-dimensional image meets the different vertical display viewing angles required by different audience face positions and audience numbers; and the backlight drive module synchronously adjusts and increases the brightness of the backlight according to the second electronic signal to compensate The brightness of the display system changes due to the change of the multi-segment display area, so that the display system maintains the original brightness.

As an optional technical solution: the image capture device includes a video camera.

As an optional technical solution: the image capture device includes an angle measurement module to obtain angle information of the vertical offset of the viewer's face relative to the center of the display panel.

As an optional technical solution: the display panel of the display is a liquid crystal panel or an organic light-emitting panel.

As an optional technical solution: the display panel includes a three-dimensional image display module of a pattern retardation film.

As an optional technical solution: the multi-segment display areas of the pixel are respectively controlled by voltage to switch to form a light-shielding area or to maintain a display area.

As an optional technical solution: the adjustment degree of the multi-segment display area of the pixel is based on the following formula: D=d×tanθ ₁ and a=AD, wherein, D is the length of the light-shielding area, and d is the phase difference of the corresponding pattern The distance from the film to the pixel, _θ1 is the vertical offset angle of the viewer's face relative to the center of the display panel, A is the length of the multi-segment display area before the change, and a is the length of the multi-segment display area after the change.

As an optional technical solution: the backlight source of the display independently compensates the changed brightness of the multi-segment display area.

As an optional technical solution: the backlight source includes a plurality of light emitting diodes.

As an optional technical solution: the plurality of light-emitting diodes are arranged in a matrix, and the voltage of each light-emitting diode is changed through the drive module receiving the second electronic signal, so that the brightness of each light-emitting diode can be adjusted.

Compared with the prior art, the display system for automatically adjusting the viewing angle of the 3D image of the present invention can automatically adjust the vertical display viewing angle required for the image of the 3D display, by reducing the vertical image crosstalk phenomenon (crosstalk), and synchronously adjusting and compensating the backlight source Brightness, so that the original brightness when viewing the display system can still be maintained, satisfying the viewing comfort of a single viewer or multiple viewers.

Description of drawings

FIG. 1 is a schematic diagram of a conventional stripe pattern retardation film pattern.

FIG. 2 is a conventional schematic diagram of increasing shading areas to improve crosstalk of 3D images.

FIG. 3 is a structural diagram of a display system for automatically adjusting a display angle of a 3D image according to the present invention.

FIG. 4 is a schematic diagram of a method of separately controlling switches of multi-segment display areas by voltages in a preferred embodiment of the present invention.

FIG. 5 is a side view illustrating a pixel.

5-1 to 5-3 are schematic diagrams of ways to improve crosstalk under different audience face positions and audience numbers in a preferred embodiment of the present invention.

FIG. 6 is a schematic diagram of the calculation formula of the change degree of the multi-segment display area and the light-shielding area in a preferred embodiment of the present invention.

Fig. 7 is a flowchart of a preferred embodiment of the present invention.

Detailed ways

In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

Please refer to FIG. 3 and FIG. 4. FIG. 3 is a structural diagram of a display system for automatically adjusting a 3D image display viewing angle of the present invention. One of the purposes of the present invention is to provide a display system 200 for automatically adjusting a 3D image display viewing angle. The system 200 includes an image capture device 2 , a display 1 and a control device 3 . The image capture device 2 is used to capture images including the position and number of faces of the audience. The display 1 includes a display panel 100 and a backlight source 10. The pixel 5 of the display panel 100 has a multi-segment display area 51, and the display panel 100 includes a display driving module 101 to drive individual voltages of the multi-segment display area 51, so that the multi-segment display area 51 is adjustable. The backlight 10 includes a backlight driving module 11 , and the backlight driving module 11 drives the voltage of the backlight 10 so that the brightness of the backlight 10 can be adjusted. The control device 3 is coupled to the image capture device 2 and the display 1 respectively, and the control device 3 has a signal processing module 31 and a signal output module 32 . After receiving the image captured by the image capturing device 2, the signal processing module 31 calculates the angle of the audience's face vertically offset relative to the center of the display panel 100 and the number of the audience, and converts it into a first electronic signal and a second electronic signal. Signal; the signal output module 32 respectively outputs the first electronic signal to the display driving module 101 of the display panel 100 , and outputs the second electronic signal to the backlight driving module 11 of the backlight 10 .

Wherein, the display driving module 101 controls the multi-segment display area 51 of the display panel 100 according to the first electronic signal, so that the vertical display angle of view of the 3D image generated by the display panel 100 meets the needs of different viewers' facial positions and the number of viewers. Different vertical display viewing angles; and the backlight drive module 11 synchronously adjusts and increases the brightness of the backlight source 10 according to the second electronic signal, so as to compensate the brightness change of the display system 200 caused by the change of the multi-segment display area 51, so that the display system 200 maintains original brightness.

In an embodiment of the present invention, the image capture device 2 includes a camera, which can capture dynamic or static images and store them as digital images, which are provided to the signal processing module 31 of the subsequent control device 3 for processing.

In another embodiment of the present invention, the image capture device 2 includes an angle measurement module 21, which can directly obtain the angle information of the vertical offset of the viewer's face relative to the center of the display panel, and transmit it to the signal processing module of the control device 3 31 to perform calculations.

In another embodiment of the present invention, the display panel 100 of the display 1 may be a display panel with a pixel matrix, such as a liquid crystal panel or an organic light emitting panel.

In another embodiment of the present invention, the display panel 100 of the display 1 is a three-dimensional image display module including the pattern retardation film 400 .

Please refer to FIG. 4 , in another embodiment of the present invention, the multi-segment display area 51 of each pixel 5 of the display panel 100 can be switched to form a light-shielding area 53 or maintain a display area by separately controlling switches through voltages. When the multi-segment display area When the shading area 53 formed by 51 is switched, the effect of the shading area 53 is the same as that of the original shading area BM between the pixels 5; please refer to FIG. , then the multi-segment display area 51 is in a bright state and maintains the light transmittance of the original pixel 5, and the left and right eye images can reach the left eye and the right eye respectively from the left eye visual area L and the right eye visual area R of the pattern retardation film 400, and Crosstalk will not occur; but when the vertical viewing angle is too large, for example, when the face position A is at an angle to the position where the display 1 is viewed in parallel, the space between the pixels 5 is not enough to completely cover the two sets of images of different viewing angles of the left and right eyes, As shown in Figure 5, when the images of the left and right eyes arrive at the left eye from the visual area L of the left eye at the same time, crosstalk will occur, resulting in a decrease in image quality and discomfort for the audience. This phenomenon can be improved by viewing angle.

Please refer to Figure 5-1 to Figure 5-3. Figure 5-1 to Figure 5-3 are schematic diagrams of ways to improve crosstalk under different audience face positions and audience numbers. When the audience's face position is offset by 1 When the center of the viewer’s face is A or B as shown in Figure 5-1 and Figure 5-2, the pixels 5 of the display panel 100 increase the corresponding light-shielding area 53 synchronously, so that the image can be viewed from the left side of the pattern retardation film 400. The eye visual zone L and the right eye visual zone R can reach the left eye and the right eye respectively without crosstalk; When , by detecting the viewer's face position with the maximum deviation angle, such as face position A and face position B, the maximum deviation angles θ ₁ and θ ₂ of face position A and face position B are increased respectively The light-shielding area 53a and the light-shielding area 53b corresponding to each pixel 5 enable the viewing angle of the display panel 100 to cover multiple viewers within the range of _θ1 and _θ2 without crosstalk.

Please refer to Fig. 6 again, Fig. 6 is the schematic diagram of the calculation formula of the multi-segment display area of the pixel and the degree of change in the shading area _. a=AD, wherein, D is the length of the light-shielding region 53, d is the distance from the corresponding pattern retardation film 400 to the pixel, and _θ1 is the vertical offset angle of the viewer's face position A relative to the center of the display panel 100, A is the length of the multi-segment display area 51 before the change, and a is the length of the multi-segment display area 52 after the change; and the measurement of _θ1 , for example, can obtain the deviation of the viewer's face position through the angle measurement module 21 of the image capture device 2 The required angle of view for the position of the viewer's face, the length of the changed multi-segment display area 52 and the length of the shading area 53 that need to be increased can be obtained through the calculation of the above formula.

Please refer to FIG. 5-1 , in another embodiment of the present invention, the backlight source 10 of the display 1 can individually compensate the brightness of the multi-segment display area 52 after changing. The light transmittance of the changed multi-segment display area 52 decreases due to the increase of the light-shielding area 53 .

In another embodiment of the present invention, the backlight source 10 includes a point light source, such as a plurality of light-emitting diodes, to provide local area backlight adjustment; wherein, the plurality of light-emitting diodes are arranged in a matrix, and can be controlled by The driving module 101 receives the second electronic signal to change the voltage of individual LEDs, so that the brightness of individual LEDs can be adjusted.

Please refer to FIG. 7 . FIG. 7 is a flowchart of a preferred embodiment of the display system of the present invention. First, the image capture device 2 captures an image including the position and number of faces of the audience (step S1); The angle of the vertical offset of the center and the number of spectators (step S2);

If there is only a single audience, the signal output module 32 of the control device 3 can read the information of the audience's face deviation angle calculated by the signal processing module 31 (step S3), and output the first electronic signal to the display panel 100 respectively. The display driver module 101 is used to adjust the individual voltages of the multi-segment display areas 51 of the display panel 100, adjust the shading area 53 according to the angle of the viewer's face deviation, and change the 3D viewing angle of the display panel 100 (step S4); and the second electronic signal To the backlight driving module 11 of the backlight source 10, the backlight driving module 11 synchronously adjusts and increases the brightness of the backlight source 10 according to the second electronic signal, so as to compensate the brightness change of the display system 200 due to the change of the multi-segment display area 51, so that the display system 200 Maintain the original brightness (step S7); and then return to step S1 to capture the viewer's image to continuously detect whether the number or position of the viewer has changed, so that the display system 200 can automatically adjust the three-dimensional display viewing angle at any time;

If there are multiple spectators, the signal output module 32 of the control device 3 can read the angle information of all spectators' face deviations calculated by the signal processing module 31 (step S5), and output the first electronic signal to the display respectively. The display driving module 101 of the panel 100 adjusts the individual voltages of the multi-segment display areas 51 of the display panel 100, and adjusts the shading area 53 according to the angle of the maximum deviation of the audience's face among the multiple audience faces, so as to change the voltage of the display panel 100. 3D viewing angle (step S6), so that the range of viewing angles covers multiple viewers in the interval; and the second electronic signal to the backlight driving module 11 of the backlight 10, and the backlight driving module 11 synchronously adjusts and increases the brightness of the backlight 10 according to the second electronic signal , to compensate for the change in brightness of the display system 200 caused by the change of the multi-segment display area 51, so that the display system 200 maintains the original brightness (step S7); and then return to step S1 to capture the audience image to continuously detect the number of audience Or whether the position is changed, so that the display system 200 can automatically adjust the three-dimensional display viewing angle at any time.

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, changes and modifications made without departing from the spirit and scope of the present invention all belong to the scope of patent protection of the present invention.

Claims (10)

1. display system of automatically adjusting the 3-dimensional image display view angle is characterized in that comprising:

Image capture unit, its acquisition comprises the image of spectators' face location and face's quantity;

Display comprises:

Display floater, the pixel of this display floater have the multistage viewing area, and this display floater comprises driver module, to drive the voltage of this multistage viewing area, make this multistage viewing area for regulating and controlling; And

Backlight, it comprises the backlight drive module, to drive the voltage of this backlight, makes the brightness of this backlight for regulating and controlling; And

Control device couples with this image capture unit and this display respectively, and this control device comprises:

Signal processing module after receiving this image that this image capture unit captures, calculates spectators face with respect to angle and the spectator attendance of this display floater central vertical skew, and is converted to the first electronic signal and the second electronic signal; And

Signal output module is exported respectively this first electronic signal to this driver module of this display floater, and exports this second electronic signal to this backlight drive module of this backlight;

Wherein, this driver module regulates and controls this multistage viewing area of this display floater according to this first electronic signal, make the vertical display view angle of the 3-dimensional image of this display floater generation, meet this different vertical display view angle required under different spectators' face location and spectator attendance; And this backlight drive module is synchronously adjusted the brightness that increases this backlight according to this second electronic signal, to compensate this display system because the brightness that this multistage viewing area change causes changes, makes this display system keep original brightness.

2. display system as claimed in claim 1, it is characterized in that: this image capture unit comprises video camera.

3. display system as claimed in claim 1, it is characterized in that: this image capture unit comprises Angle Measurement Module, to obtain spectators face with respect to the angle information of this display floater central vertical skew.

4. display system as claimed in claim 1, it is characterized in that: the display floater of this display is liquid crystal panel or organic luminous panel.

5. display system as claimed in claim 1, it is characterized in that: this display floater comprises the 3-dimensional image display module of patterned retarder.

6. display system as claimed in claim 5 is characterized in that: control switch is distinguished by voltage in this multistage viewing area of this pixel, forms lightproof area or keeps the viewing area and switch.

7. display system as claimed in claim 6 is characterized in that: the regulation and control degree of this multistage viewing area of this pixel is according to following formula: D=d * tan θ ₁And a=A-D, wherein, D is the length of this lightproof area, d is that this patterned retarder of correspondence is to the distance of this pixel, θ ₁Be the spectators face angle with respect to this display floater central vertical skew, the length of this multistage viewing area of A before for a change, the length of this multistage viewing area of a after for a change.

8. display system as claimed in claim 1 is characterized in that: the brightness of this multistage viewing area after this backlight separate compensation of this display changes.

9. display system as claimed in claim 8, it is characterized in that: this backlight comprises a plurality of light-emitting diodes.

10. display system as claimed in claim 9, it is characterized in that: these a plurality of light-emitting diodes are that matrix is arranged, and change the respectively voltage of this light-emitting diode by this driver module receives this second electronic signal, make the brightness of this light-emitting diode respectively for regulating and controlling.

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