JP4154770B2 - Video display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a video display device suitable for a plurality of observers to observe a display video on a display screen at different viewing angles.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a video display device in which a plurality of independent videos are selectively displayed on a single display device so that the display video is observed from the directions of a plurality of observers.
For example, as shown in Japanese Patent Application Laid-Open No. 6-236152, for example, by providing a lenticular lens along the display screen of the display element, each optical element of the lenticular lens is operated through the lenticular lens. Some display images are observed at an observer's position.
[0003]
[Problems to be solved by the invention]
However, in the above video display device, for example, when a plurality of observers are, for example, an elderly person and a child, the color and brightness of the display video observed by each observer are adapted to the characteristics of each observer. There is a problem that it cannot be adjusted.
Accordingly, an object of the present invention is to provide an image display device that adjusts characteristics such as brightness of a display image so as to match characteristics of each observer such as age.
[0004]
[Means for Solving the Problems]
In solving the above problem, according to the invention described in claim 1, the video display device
A liquid crystal display element (60);
A condensing optical system (30 to 50) for alternately condensing each light from the plurality of light sources (10, 20) to both eyes of each observer through a liquid crystal display element;
Control means (70 to 100) for controlling the liquid crystal display element so that the liquid crystal display element displays an image on the display screen based on the video signal in accordance with scanning on the display screen of the liquid crystal display element.
[0005]
In the video display device, the observer component separating means (200, 210) separates each color signal component of the video signal into each observer component, and the correcting means (120, 220) is arranged for each observer component. According to the input data representing the characteristics of the observer, correction is made so as to match the characteristics of each observer, and the synthesizing means (230) synthesizes the components for each observer corrected by the correcting means as a synthesized signal. Instead of the video signal, the video signal is output to the control unit, and the control unit controls the liquid crystal display element to display an image on the liquid crystal display element based on the composite signal.
[0006]
As a result, the liquid crystal display element displays the video signal in a state in which the content of the video signal is corrected so as to match the characteristics of each observer under the alternating light collecting action by the light collecting optical system. For this reason, each observer can observe the display image of a liquid crystal display element in the state suitable for the characteristic.
According to the invention of claim 2, the video display device is
A display element (60);
A lenticular lens (140) for condensing light from the light source (130) to both eyes of each observer through different scanning positions on the display screen of the display element;
Control means (70 to 100) for controlling the display element so that the display element displays an image on the display screen based on the video signal in accordance with scanning on the display screen of the display element.
[0007]
In the video display device, the observer component separating means (200, 210) separates each color signal component of the video signal into each observer component, and the correcting means (120, 220) is each observation component. In accordance with the input data representing the characteristics of the viewer, correction is made to match the characteristics of each observer, and the synthesizing means (230) synthesizes each observer component corrected by the correcting means as a synthesized signal, and the synthesized signal is converted into a video signal. Instead, it outputs to the control means, and the control means controls the display element to display an image on the display element based on the composite signal.
[0008]
Accordingly, the display element displays the video signal in a state in which the content of the video signal is corrected to match the characteristics of each observer under the action of the lenticular lens. For this reason, each observer can observe the display image of the display element in a state suitable for the characteristics, substantially in the same manner as in the first aspect of the invention.
According to the invention described in claim 3, in the invention described in claim 1 or 2, the correction means is an input means for inputting at least one of the age and color vision degree of each observer as input data. 120),
Based on the input data of the input means, each observer component is corrected in at least one of brightness and color so as to match at least one of the age and color vision degree of each observer.
[0009]
As described above, when the characteristics of each observer are at least one of age and color vision degree, the display image of the display element is adjusted so that the characteristics of each observer matches at least one of age and color vision degree. Also by this, the same effect as the effect of the invention described in claim 1 or 2 can be achieved.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of an image display device according to the present invention, and this image display device includes an electro-optical system D (see FIG. 1) and an electric circuit E (see FIG. 2). ing.
[0011]
As shown in FIG. 1, the electro-optical system D includes both light sources 10 and 20, and both the light sources 10 and 20 are disposed on the same horizontal plane with a space therebetween. Here, the light source 10 corresponds to the left and right eyes of the right observer MR, while the light source 20 corresponds to the left and right eyes of the left observer ML.
The optical shutters 30 and 40 are respectively disposed so as to face the light sources 10 and 20, and both the optical shutters 30 and 40 are constituted by monochrome liquid crystal shutters.
[0012]
Then, the optical shutter 30 transmits the light from the light source 10 toward the convex lens 50 by opening, and blocks the transmission by closing. On the other hand, the optical shutter 40 transmits the light from the light source 20 toward the convex lens 50 by opening, and blocks the transmission by closing. Here, the opening and closing of the optical shutters 30 are alternately performed at regular intervals as will be described later.
[0013]
The convex lens 50 condenses the transmitted light from the optical shutter 30 to the left and right eyes of the observer MR through the transmissive liquid crystal panel 60, and the transmitted light from the optical shutter 40 through the transmissive liquid crystal panel 60 to the observer ML. Focus on both eyes.
As shown in FIG. 2, the liquid crystal panel 60 includes a plurality of scanning electrodes X, a plurality of signal electrodes Y positioned at right angles to the scanning electrodes X, and the plurality of scanning electrodes X and the plurality of scanning electrodes. And a smectic liquid crystal interposed between the signal electrodes Y. Here, each scanning electrode X, each signal electrode Y, and the above smectic liquid crystal constitute a plurality of matrix pixels.
[0014]
The electric circuit E includes a scanning electrode driving circuit 70 and a signal electrode driving circuit 80 as shown in FIG. The scan electrode driving circuit 70 receives a write voltage, a hold voltage, or an erase voltage generated from the power supply circuit 90 as a scan voltage. The scan electrode driving circuit 70 scans each scan electrode X line-sequentially based on a synchronization signal (described later) from the control circuit 100, and the scan voltage from the power supply circuit 90 is applied to each scan electrode X along with this scan. Are sequentially applied.
[0015]
The signal electrode drive circuit 80 uses each signal electrode Y as a signal voltage corresponding to a plurality of voltages generated from the power supply circuit 110 by synthesizing a synthesized signal (described later) from the control circuit 100 in synchronization with the write voltage of the scanning voltage. Apply to.
The control circuit 100 includes a microcomputer 101. The microcomputer 101 executes a computer program according to the flowchart shown in FIG. 3, and inputs from a personal computer 120 (hereinafter referred to as a personal computer 120) during the execution. According to the data, video signal correction (described later) is performed to output a signal voltage to the signal electrode drive circuit 80, and a synchronization signal (vertical synchronization signal and horizontal synchronization signal) is output to the scan electrode drive circuit 70. In addition, drive processing of the both light shutters 30 and 40 is performed. The computer program is stored in advance in the ROM of the microcomputer 101.
[0016]
The personal computer 120 inputs the characteristics of each observer to the microcomputer 101 as observer characteristic data in accordance with the operation of the keyboard.
In this embodiment configured as described above, when a video signal and a synchronization signal are input to the control circuit 100, the microcomputer 101 starts executing the computer program according to the flowchart of FIG. 3 based on the synchronization signal.
[0017]
After starting the execution of the computer program, in step 200, the video signal is sequentially converted into a red signal component (hereinafter referred to as R component) and a green signal component (hereinafter referred to as G component) for each display screen of the liquid crystal panel 60. And a blue signal component (hereinafter referred to as B component).
Next, in step 210, the R component, the G component, and the B component are, for each display screen, the observer MR R component, the G component, and the B component, respectively, and the observer ML R component, the G component. And B component.
[0018]
In the present embodiment, the components corresponding to the odd-numbered scanning lines among the R component, G component, and B component correspond to the observer MR R component, G component, and B component, and the R component, Of the G component and B component, each component corresponding to each even-numbered scanning line corresponds to the observer ML R component, G component, and B component. The scanning line is one of a plurality of scanning lines made on the display screen of the liquid crystal panel 60.
[0019]
After the processing in step 210, in step 220, the brightness and color of each observer ML, MR R component, G component, and B component are corrected as follows.
Here, the spectral transmittance-wavelength characteristic data shown in FIG. 4 is used for brightness correction, and the relative visibility-wavelength characteristic data shown in FIG. 5 is used for color correction.
As shown in FIG. 4, the spectral transmittance-wavelength characteristic data is a curve representing the relationship between the spectral transmittance corresponding to brightness and the wavelength of light, with age as a parameter. In FIG. 4, curves P20 to P60 correspond to cases of ages 20 to 60, respectively.
[0020]
Further, as shown in FIG. 5, the specific visibility-wavelength characteristic data is a curve representing the relationship between the specific visibility corresponding to the color and the wavelength of light, with the degree of color vision as a parameter. In FIG. 5, a curve Q1 corresponds to the case of a color blind person, a curve Q2 corresponds to the first color blind person among the color blind persons, and a curve Q3 corresponds to the second person of the color blind person. Corresponds to color blind people.
[0021]
Both spectral transmittance-wavelength characteristic data and specific visibility-wavelength characteristic data are stored in advance in the ROM of the microcomputer 101.
If the observer MR is a person with normal color vision, the observer MR inputs the color sense data and age as color vision data and age data to the microcomputer 101 by operating the keyboard of the personal computer 120. On the other hand, if the observer ML is a first color blind person, for example, this observer ML operates the keyboard of the personal computer 120 to indicate that he is a first color blind person and age as color vision data and age data. To enter.
[0022]
Then, each color corresponding to the R component, the G component, and the B component for the observer MR, that is, each specific luminous sensitivity is an R component based on the relative visual sensitivity-wavelength characteristic data in accordance with the color vision data that is input data of the observer MR. , The G component and the B component are corrected in relation to each wavelength, and the brightness, that is, each spectral transmittance corresponding to the R component for the observer MR, the G component, and the B component is the input data of the observer MR. In accordance with certain age data, correction is made in relation to each wavelength of the R component, G component, and B component based on spectral transmittance-wavelength characteristic data.
[0023]
On the other hand, each color corresponding to the R component, the G component, and the B component for the observer ML, that is, each specific luminous sensitivity is an R component based on the specific luminous sensitivity-wavelength characteristic data according to the color vision data that is input data of the observer ML. , The G component and the B component are corrected in relation to each wavelength, and the brightness, that is, each spectral transmittance corresponding to the R component for the observer ML, the G component, and the B component is input to the observer ML. In accordance with certain age data, correction is made in relation to each wavelength of the R component, G component, and B component based on spectral transmittance-wavelength characteristic data.
[0024]
Then, in step 230, the R component, G component, and B component for observer MR, and the R component, G component, and B component for observer ML, which have been color-corrected and brightness-corrected as described above, are stored for one display screen. The synthesized signal is synthesized and output as a signal voltage to the signal electrode driving circuit 80, and the synchronization signal is output to the scanning electrode driving circuit 70.
[0025]
Next, in step 240, optical shutter drive signals are alternately output to the optical shutters 30 and 40 at a predetermined cycle.
As described above, when the optical shutter driving signal is alternately output to the optical shutters 30 and 40, the optical shutters 30 and 40 are alternately opened to transmit light from the light sources 10 and 20, respectively. Accordingly, the light transmitted through the optical shutter 30 is condensed on both eyes of the observer MR through the liquid crystal panel 60 by the convex lens 50, while the light transmitted through the optical shutter 40 is transmitted through the liquid crystal panel 60 by the convex lens 50 to both the viewer ML. Focused on the eyes.
[0026]
Further, as described above, when the signal voltage is output to the signal electrode drive circuit 80 and the synchronization signal is output to the scan electrode drive circuit 70, the scan electrode drive circuit 70 detects each signal based on the synchronization signal from the microcomputer 101. The scanning electrodes X are line-sequentially scanned, and a scanning voltage from the power supply circuit 90 is applied to the scanning electrodes scanned line-sequentially in accordance with the line-sequential scanning. On the other hand, the signal electrode drive circuit 80 applies the signal voltage from the microcomputer 101 to each signal electrode Y under the voltage from the power supply circuit 110.
[0027]
Accordingly, the liquid crystal panel 60 is matrix driven in accordance with the scanning voltage from the scanning electrode driving circuit 70 and the signal voltage from the signal electrode driving circuit 80, and based on each transmitted light from the convex lens 50, Display the contents alternately.
Thereby, the observer ML can observe the display image of the liquid crystal panel 60 using the light from the light source 20 as the backlight, and the observer MR displays the display on the liquid crystal panel 60 using the light from the light source 30 as the backlight. The image can be observed.
[0028]
In this case, as described above, the color correction of the video signal based on the relative visibility-wavelength characteristic data and the spectral transmittance-wavelength characteristic data according to the color blindness and age as the first color blind person, which is a characteristic of the observer ML, and Brightness correction is appropriately corrected for each of the R component, G component, and B component.
Therefore, the observer ML can observe the display image of the liquid crystal panel 60 satisfactorily in an easy-to-view state that matches the characteristics.
[0029]
In addition, color correction and brightness correction of a video signal are performed based on specific visual sensitivity-wavelength characteristic data and spectral transmittance-wavelength characteristic data according to the color vision degree and age as a normal color vision person, which is a characteristic of the observer MR. , G component and B component are appropriately corrected.
Therefore, the observer MR can observe the display image of the liquid crystal panel 60 satisfactorily in an easy-to-view state that matches the characteristics.
[0030]
Note that even if the observer ML is a second color blind person, substantially the same operational effects as described above can be achieved by correction based on the relative luminous sensitivity-wavelength characteristic data corresponding thereto.
FIG. 6 shows a modification of the above embodiment.
In this modification, a single light source 130 and a lenticular lens 140 are employed in place of the two light sources 10 and 20, the two light shutters 30 and 40, and the convex lens 50 described in the above embodiment.
[0031]
The light source 130 directly emits light toward the liquid crystal panel 60 described in the above embodiment. The lenticular lens 140 is in close contact with the liquid crystal panel 60 on the display screen side (observer ML, MR side) of the liquid crystal panel 60. Thereby, the lenticular lens 140 divides and transmits the transmitted light from the light source 140 of the liquid crystal panel 60 to both eyes of both observers ML and MR.
[0032]
Specifically, the transmitted light of each pixel corresponding to each odd-numbered scanning line on the display screen of the liquid crystal panel 60 is incident on both eyes of the viewer ML, while each even-numbered number on the display screen of the liquid crystal panel 60 is displayed. The transmitted light of each pixel corresponding to the scanning line is incident on both eyes of the observer ML.
Also by this, the contents of the corrected video signal synthesized in step 230 can be satisfactorily observed by each observer ML, MR in an easy-to-view state that matches the characteristics of each observer ML, MR.
[0033]
In the implementation of the present invention, the liquid crystal of the liquid crystal panel 60 is not limited to the smectic liquid crystal but may be various liquid crystals such as a nematic liquid crystal.
In implementing the present invention, the brightness of each of the light sources 10, 20, and 130 may be adjusted as necessary. Thereby, the brightness correction by the microcomputer 101 can be further improved.
[0034]
Further, in the above-described embodiment and its modified examples, the example in which the characteristics of the observer are corrected from the viewpoint of the degree of color vision and age has been described, but the present invention is not limited to this. In addition, the characteristics of the observer may be corrected.
In implementing the present invention, even if an EL panel is used instead of the light source 130 and the liquid crystal panel 60 described in the modification, the same effects as those of the modification can be achieved.
[0035]
In implementing the present invention, the number of observers is not limited to two, and a plurality of observers may generally be used. In this case, in the above embodiment, the number of light sources and optical shutters may be matched to the number of viewers, respectively, and the scanning lines on the display screen of the liquid crystal panel are also (3n-2) th and (3n-1) th. And the 3n-th scanning line may be divided to correspond to each observer.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of an electro-optical system D in an embodiment of a video display device according to the present invention.
2 is a block diagram showing an electric circuit E of the video display device of FIG. 1. FIG.
FIG. 3 is a flowchart showing an operation of the microcomputer of FIG. 2;
FIG. 4 is a graph showing spectral transmittance-wavelength characteristic data.
FIG. 5 is a graph showing specific visibility-wavelength characteristic data.
FIG. 6 is a schematic plan view of an electro-optical system showing a modification of the embodiment.
[Explanation of symbols]
10, 20, 130 ... light source, 30, 40 ... optical shutter, 50 ... convex lens,
60 ... Liquid crystal panel, 70 ... Scanning electrode driving circuit, 80 ... Signal electrode driving circuit,
100: control circuit, 101: microcomputer,
120 ... PC, 140 ... Lenticular lens.

Claims (3)

A liquid crystal display element (60);
A condensing optical system (30 to 50) for condensing each light from a plurality of light sources (10, 20) alternately to both eyes of each observer through the liquid crystal display element;
An image comprising control means (70 to 100) for controlling the liquid crystal display element so that the liquid crystal display element displays an image on the display screen based on a video signal in accordance with scanning on the display screen of the liquid crystal display element. In the display device,
Observer component separating means (200, 210) for separating each color signal component of the video signal into each observer component;
Correction means (120, 220) for correcting each observer component so as to match the characteristics of each observer according to input data representing the characteristics of each observer;
Synthesizing means (230) for synthesizing each observer component corrected by the correcting means as a synthesized signal and outputting the synthesized signal to the control means instead of the video signal;
The video display device characterized in that the control means controls the liquid crystal display element to display an image on the liquid crystal display element based on the composite signal. A display element (60);
A lenticular lens (140) for condensing light from the light source (130) on both eyes of each observer through different scanning positions on the display screen of the display element;
In a video display device comprising control means (70 to 100) for controlling the display element so that the display element displays an image on the display screen based on a video signal in accordance with scanning on the display screen of the display element. ,
Observer component separating means (200, 210) for separating each color signal component of the video signal into each observer component;
Correction means (120, 220) for correcting each observer component so as to match the characteristics of each observer according to input data representing the characteristics of each observer;
Synthesizing means (230) for synthesizing each observer component corrected by the correcting means as a synthesized signal and outputting the synthesized signal to the control means instead of the video signal;
The video display apparatus, wherein the control means controls the display element to display an image on the display element based on the composite signal. The correction means includes an input means (120) for inputting at least one of the age and color vision degree of each observer as the input data,
2. The component for each observer is corrected in at least one of brightness and color so as to match at least one of the age and color vision degree of each observer based on input data of the input means. 2. The video display device according to 2.

Images