JPS6114710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device suitable for application to, for example, a television receiver.

FIG. 1 is a front view of a display device according to the present invention, in which numeral 1 indicates a main image display section and numeral 2 indicates a relaxed image display section. The main video display section 1 is, for example, the video screen of a color television receiver. The relaxation image display section 2 is not an essential component for the present invention. The relaxed image display section 2 uses light from the outermost portion of the main image to present a relaxed image with lower resolution and lower contrast than the main image. In the configuration shown in FIG. 1, a main video display section 1 and a relaxation video display section 2 serve as image display sections, which are surrounded by a video frame 3. An illumination light presentation section 4 is provided surrounding this video frame 3. Reference numeral 5 denotes an outer frame arranged along the outer edge of the illumination light presentation section 4.

The illumination light presentation section 4 has a height of (1/
The brightness is preferably about (1 to 1/2) times the average brightness of the main image display section 1, and the luminance is macroscopically uniform. It is better to have a shape that is highly attractive to the eye and to be free of uneven brightness. The saturation of the hue of the illumination light presented to the illumination light presentation unit 4 must not be too high, and the temporal change in brightness must be more gradual than the average light of the main image or the change in its specific location. be done.

According to the present invention configured as described above, it is possible to comfortably view images that are clear, powerful, and even have a three-dimensional effect, and it has been confirmed that viewing the images for a long period of time does not cause fatigue. ing. Such effects can be further enhanced by providing the relaxation image display section 2. This effect can also be explained by human visual characteristics.

Human eyes constantly and intermittently move the point of gaze unconsciously through eye movements, and the center of the eye captures external information and sends it to the brain. For example, when viewing a television image, the fovea of the retina scans the image, and the peripheral area near the fovea is simultaneously stimulated by light. If the stimulation received by this peripheral area and its changes are due to things other than the image (for example, the frame, reflected light from the surroundings, other objects in the room, etc.),
Shifting the point of attention disrupts smoothness and has negative effects. In the present invention, an illumination presentation section is provided around the video display section, the brightness and hue of which are controlled according to the content of the reproduced image, so that the reproduced image has a spaciousness. This is intended to prevent the subject from receiving unnatural stimulation, and also to promote smooth movement of the point of gaze. Therefore, the spatial information contained in the image can be fully perceived, increasing the realism of the image.Furthermore, it is less tiring and less affected by reflections of ambient light, making it possible to view the image comfortably. can. Specific examples of the present invention will be described below.

FIG. 2 shows an embodiment for realizing the above-described apparatus shown in FIG. 1, and in the figure, 6 indicates a color picture tube. 6a shows the image plane of the color picture tube; 7
indicates the fluorescent surface of a color picture tube. color picture tube 6
is driven in exactly the same way as a normal color television receiver, and the received image is presented on the image screen 6a. A neutral filter 8 having a transmittance of 50%, for example, is arranged so as to cover an area other than the peripheral area of the image plane 6a. The area of this neutral filter 8 becomes the main video section 1.

Reference numeral 9 denotes a case, and the case 9 is constituted by an inner case 9a and an outer case 9b, which are square cylinders and coaxial, and have a circular opening.
The inner peripheral shape of the inner case 9a is made to match the outer peripheral shape of the front side of the color picture tube 6. A transparent reflective plate 1 is installed along the outer edge of the neutral filter 8, approximately perpendicular to the image plane.
Between this transparent reflector 10 and the inner wall of the inner case 9a, neutral filters (transmittance 50 [%] 11, transmission type Scatter plate 1
2 and several Fresnel convex lenses 13 are arranged in series. The area of this neutral filter 11 becomes the relaxed image display section 2, and the end surface of the inner case 9a is colored dark and gray with low reflectance and becomes the image frame 3.

A cylindrical space (referred to as an illumination box) that is partitioned by an inner case 9a and an outer case 9b and surrounds the color picture tube 6.
The height h of the front opening is, for example, 1/2 of the height of the neutral filter 8, and a fluorescent tube as a light source is arranged behind it. A red fluorescent surface, an edge fluorescent tube and a blue fluorescent tube with red, edge and blue paint on the tube surface, respectively, are used as light sources. Four sets of fluorescent tubes, each consisting of three fluorescent tubes that emit light in these three primary colors, are arranged at the left, right, upper and lower positions of the image display section. The red fluorescent tubes placed horizontally at the top and bottom of the image display section are indicated by R ₁ and R _{2, and the fluorescent tubes at the edges are indicated by R 1 and R 2} , respectively.
G ₁ and G ₂ indicate blue fluorescent tubes, B ₁ and B ₂ indicate red fluorescent tubes, and R ₃ and R ₄ indicate red fluorescent tubes arranged vertically at the left and right positions of the image display section, respectively. The fluorescent tube on the edge
They are designated G ₃ and G ₄ , and the blue fluorescent tubes are designated B ₃ and B ₄ . However, in FIG. 2, G ₄ and B ₄ are not shown. Furthermore, a correction filter 14 is arranged in front of each of the fluorescent tubes for color correction and the like.

The front and rear depth d of the lighting box should be at least twice the total tube pitch, for example 4, due to the mixing of colored lights from the fluorescent tubes.
It is said to be doubled. Furthermore, in order to effectively utilize the illumination light, a reflective plate, such as a plastic mirror with an aluminum reinforcing plate, is attached to the inner wall of the illumination box and rear case. A milky white scattering plate 15 is provided to cover the front opening of the illumination box, and a neutral filter 16 having a transmittance of 25 to 75% is arranged in front of the milky white scattering plate 15. Further, a transparent scattering plate, such as a fly's eye lens 17, is provided at an intermediate position between the front opening and the light source. This fly's eye lens 17 is used to eliminate unevenness in brightness and to mix three primary color lights. A milky white scattering plate 15 is provided to eliminate unevenness in brightness and provide uniform illumination light over the entire surface, uniformly mix the three primary colors, and adjust the color tone.The milky white scattering plate 15 serves as a screen for illumination light presentation section 4 Configure. A neutral filter 16 is provided to suppress reflected light. Further, an outer frame 18 is provided on the outer edge of the front surface of the outer case 9b.

In the embodiment described above, each primary color fluorescent tube is arranged to present illumination light related to a color signal at a predetermined position of the reproduced image of the color picture tube 6. FIG. 3 shows an example of an electrical configuration for this purpose, and in the same figure, 20 is a 3.
A video signal circuit that generates primary color signals S _R , S _G and S _B is shown. Sampling hold circuit 21R, 2
A red signal S _R , an edge color signal S _G and a blue signal S _R are supplied to the color picture tube 6 for 1G and 21B, respectively.
is supplied. A common sampling pulse is applied from an AND gate 22 to these sampling and hold circuits 21R to 21B. 23 is a synchronization signal separation circuit, from which the horizontal synchronization signal HD and vertical synchronization signal VD are separated, the horizontal synchronization signal HD is supplied to a 5-bit binary counter 24 and a pulse delay circuit 25, and the vertical synchronization signal HD is supplied to the reset input of the counter 24. Signal VD is supplied. The 5-bit output of the counter 24 and the output of the pulse delay circuit 25 are supplied to the AND gate 22. When 32 horizontal synchronizing signals HD of a certain field are supplied from the AND gate 22 and all 5-bit outputs of the counter 24 become high level, and when a high level pulse is supplied from the pulse delay circuit 25, the sampling pulse is Occur. That is, the generation phase of the sampling pulse corresponds to a predetermined position in each field, and each primary color signal at this time is sampled and held.

This sampling hold circuit 21R, 21
The outputs of G and 21B are connected to dimmers 26R and 26G, respectively.
26B, and the amount of light of each fluorescent lamp is adjusted. In Figure 3, among the four sets of fluorescent lamps, R ₁ , G ₁ and
Only B ₁ is shown, and the respective ballasts 27R,
Dimmer 26R, 26G, 26 on 27G and 27B
A drive signal from B is supplied.

In this way, the three primary color components at predetermined positions of the image of the color picture tube 6 are sampled, and illumination light whose brightness and hue change for each field can be presented. Of course, the position from which the color video signal is extracted can be arbitrarily changed by adjusting the count number of the counter 24 and the amount of delay of the pulse delay circuit 25. The brightness of the most effective illumination light can also be adjusted using a dimmer. According to the embodiments described above, the effects described above can be obtained.

In addition, the fluorescent tubes may be ones that emit colored light such as orange or blue in addition to those that emit light in the three primary colors, and instead of placing four sets all around the image area, two sets are placed above and below, or only on the left and right. You may also do so. Furthermore, a liquid crystal may be used instead of a fluorescent light.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the basic structure of the present invention, FIG. 2 is a partially cutaway front view and cross-sectional view of an embodiment of the invention, and FIG. 3 is a block diagram showing the electrical structure thereof. 1 is a main image display section, 2 is a relaxation image display section, 3 is an image frame, and 4 is an illumination light presentation section.

Claims (1)

[Claims] 1. A display device characterized by providing an illumination light presentation section around the image display section, which is reproduced by the image display section and whose brightness and hue are controlled according to the content of the image, so that the reproduced image has an expanse.