JP3047167U - Video display device, video medium, and video display system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To optimize the brightness and the like of an image in accordance with the usage state and the image content. SOLUTION: This video display device 1 includes a setting value reading section 5 for reading a setting value signal which specifies a brightness of an image, which is input to a video medium 4 for recording a video signal, and the setting value reading section 5. And a display unit 8 whose display state is controlled by the control unit 7. If the set value signal is a signal relating to the brightness of the image and a signal relating to the degree of the volume output together with the image, the brightness and the volume can also be set. Thus, the video display device 1 can be seen and heard.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a video display device, a video medium, and a video display system that display an image on a display unit using a video signal, and particularly to a video display device suitable for improving the appearance of a video display device in a store. The present invention relates to a display device, a video medium, and a video display system.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, when a video display device using a video signal, for example, a television with a video called a televideo is shown to a customer at a store, the screen is usually set to be brighter than at home. This is because the appearance at the store is better if the image is brighter. For this reason, in consideration of the appearance of the store, initial settings are made beforehand at the factory to brighten the image and increase the volume. On the other hand, for products that are not considered for display at stores, the standard image quality and volume at home are set as initial settings.

On the other hand, when displaying an image in a standard format with an aspect ratio of 4: 3 on a high-quality television having a display screen with an asperit ratio of 16: 9, the image quality is automatically switched to the optimum image quality for the display. The technique is known (see Japanese Patent Application Laid-Open No. 6-209439). When performing this automatic switching, the optimal contrast value and sharpness value stored in the memory of the microcomputer are called at the same time as the switching and used as the display value. It is displayed.

In the United States and other countries, television transmissions with closed captions (captions) are performed for the needs of hearing-impaired persons, hearing-impaired persons, and other people. In this television transmission with closed caption, character data is transmitted on the 21st line of the vertical blanking period of the television broadcast signal and transmitted. Then, the character data is decoded by a closed caption decoder attached to the television, and is displayed at a position below the television screen.

[0005]

[Problems to be solved by the invention]

 In conventional televideo, the setting for storefront display and the setting for normal home use are selected at the time of shipment from the factory and adjusted to either setting, which makes the work cumbersome and increases productivity. Is a problem.

[0008] Furthermore, when a televideo set for store display is sold to a user, the user has to perform screen adjustment because the setting is too bright, which is troublesome. On the other hand, if televideos set for ordinary home use are used for store displays, the screen will be too dark and the appearance will be poor, resulting in poorly sold products.

[0007] At the time of store display, there is no problem if the clerk of each store adjusts the brightness and volume so that it is appropriate, but for busy store staff, such work is troublesome, so the store display is not adjusted. Tends to be done. In other words, the appearance is poor, and the store is displayed at a low volume. If the appearance is poor at the storefront, the user will not purchase the televideo but will purchase another good looking televideo.

In order to solve such a problem, as described in Japanese Patent Application Laid-Open No. 6-209439, a method of storing setting values for demonstration in a microcomputer of a television and switching the setting by a remote controller is conceivable. . Although this method can achieve a certain effect and achieve the objective to some extent, this change is performed by the clerk, so the clerk still has to be troubled, and the set value for the exhibition remains. It is difficult to say that all the devices can be switched in the future.

[0009] Further, like a closed caption system in the United States, a broadcast signal itself is transmitted with a set value signal such as image brightness and the like, and the optimum brightness is automatically set for the screen. There are also ways to do this. In this case, it has an effect of being able to display an optimum image for each screen, and it can be said that it is preferable. However, it is not possible to distinguish between store display and home use, and it is not possible to brighten only store display.

An object of the present invention is to provide a video display device, a video medium, and a video display system capable of optimizing the brightness and the like of an image in accordance with the usage state and the image content. I do.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the video display device according to the first aspect has a setting value reading unit that reads a setting value signal that specifies a brightness of an image and that is input to a video medium for recording a video signal. The control unit includes a control unit that changes an image display state based on a signal read by the set value reading unit, and a display unit whose display state is controlled by the control unit.

For this reason, when a video medium is inserted, the set value signal input to the medium is read, and the image display state is automatically switched to the set value. As a result, the optimum display state can be easily achieved by using the video medium in which the set value signal corresponding to the use state or the image state is used. Examples of the video medium include a video tape, a laser disk (LD), a digital video disk (DVD), and a video compact disk (CDV). As the video display device, a display unit such as a television with a video cassette recorder (= televideo), a television and the like, and a video cassette recorder, an LD device, a DVD device, a CDV device, and other video-related devices connected thereto. Equipment.

According to a second aspect of the present invention, in the video display device of the first aspect, the video medium is a video tape for exhibition, and the set value reading unit is a rotary head for reading a signal of the video tape. The control unit is a microcomputer that controls a television serving as a display unit, and the video display device is a televideo.

Therefore, the display state of the televideo can be automatically optimized. As a result, the appearance of the televideo display is surely improved and sales are improved.

Further, in the invention according to claim 3, in the video display device according to claim 1 or 2, the set value signal is added to a signal of a vertical blanking period following the horizontal scanning of the display section, The vertical blanking period in which no significant information such as teletext is recorded is used as the blanking period.

As described above, since the set value signal is recorded by using the vertical blanking period which is not used elsewhere, it does not affect other information and does not deteriorate the screen. , The display state of the image can be automatically switched.

In addition, according to the invention as set forth in claim 4, in the video display device according to claim 1, 2 or 3, the set value signal is related to a signal relating to the brightness of the image and a degree of the volume output together with the image. Signal. Since the volume can be set in this way, for a storefront display, setting the volume to be high can provide a video display device that is audible.

According to the invention of claim 5, in the video display device of claim 1, 2, 3, or 4, the division code for dividing the display on the display unit is one of the set value signals, and The code can be read by the set value reading unit. Therefore, when the division code for dividing the display section is read, the display section is automatically divided into a plurality of blocks. As a result, when used in store displays, the demonstration effect is further increased, and the sales of this video display device are improved.

In the video medium according to the sixth aspect, in a television signal displayed on a display unit of a device, a setting value for designating at least the brightness of an image among elements that determine a display state of the display unit. The signal is being recorded. Here, examples of the video medium include a video tape, a laser disk (LD), a digital video disk (DVD), and a video compact disk (CDV).

Since the video medium records a signal for designating the brightness of an image among the elements for determining the display state of the display unit, the display state of the device using the medium is determined by the use of the device. It can be adapted to the content of the environment or its media. For example, if the video medium is a demonstration tape, applying the tape will allow the device to display the contents of the medium at the optimal brightness for the demo.

Further, according to the invention as set forth in claim 7, in the video medium according to claim 6, the setting value signal includes a signal relating to the degree of volume output together with the image. For this reason, the volume can be set in advance, and when this medium is used for store displays, the optimum volume for the display is automatically set. As a result, the volume can be set to an audible volume, and the sales of equipment using the video medium can be improved.

In addition, according to the invention as set forth in claim 8, in the video medium according to claim 6 or 7, the set value signal is supplied to a vertical blanking period following a signal for horizontally scanning a display section of a video display device. In addition to the vertical blanking period, a period during which no significant information such as teletext is recorded is adopted.

As described above, since the set value signal is recorded by using the vertical blanking period which is not used elsewhere, it does not affect other information and does not deteriorate the screen. , The display state of the image can be automatically switched.

In the video display system according to the ninth aspect, the video display device according to any one of the first to fifth aspects and the video medium according to any one of the sixth to eighth aspects. It has. For this reason, in this video display system, it is possible to optimize the brightness of the image and the like according to the usage state of the device and the image content. As a result, when the video medium and the video display device are combined and used in a store display or the like, the video display device can be easily and automatically made to have a good appearance and good hearing, and the video display device can be easily displayed. Sells better.

[0025]

[Embodiment of the invention]

 Hereinafter, a video display system according to an embodiment of the present invention will be described with reference to FIGS. The video display device and the video medium will be described together in the description of the video display system.

This video display system includes a televideo 1 as a video display device and a video tape 4 as a video medium. As shown in FIG. 3, the televideo 1 has a circuit configuration similar to that of an ordinary television with a video cassette recorder. That is, it is composed of the video cassette recorder circuit section 2 and the television circuit section 3, and the signal of the video tape 4 can be read by the rotary head 5 in the video cassette recorder circuit section 2. Note that a set value reading unit is constituted by the rotating head, the head amplifier 10, the high-pass filter 11, the FM demodulator 12, and the microcomputers 6 and 7, which will be described later.

The microcomputer 6 of the video cassette recorder circuit section 2 controls each circuit of the video section so that a video signal to be transmitted to the television circuit section 3 is correctly restored from the video tape 4. The microcomputer 7 of the television circuit section 3 controls each circuit of the television section and appropriately controls the display state of the CRT 8 serving as a display section. That is, the microcomputer 7 includes a control unit that controls brightness, color density, hue, sharpness, and the like of the contrast and brightness of the image on the CRT 8 and controls the display of audio and text broadcast accompanying the image. Has become. Note that the microcomputer 6 and the microcomputer 7 are connected so that the signal read by the microcomputer 6 can be transmitted to the microcomputer 7.

As shown in FIG. 2, the television signal generates 262.5 rasters in the first vertical scan (= first field), and generates the previous raster in the second vertical scan (= second field). By scanning between the scanning lines, 262.5 rasters are generated (total 525 rasters are generated). Then, a transition from one scanning line to the next scanning line is a retrace line, and the interval is referred to as a vertical blanking period.

On the video tape 4, a television signal (including an audio signal) displayed on the CRT 8 is recorded. Then, in the television signal, a set value signal for determining the brightness such as contrast and brightness of the image on the CRT 8 and a set value signal for determining the volume value in the television section are recorded in advance. These set value signals are arranged in a vertical blanking period in which no significant information is included, that is, in the vertical blanking period BL20 of the twentieth line of the first field of the television signal. In the case of the closed caption described above, the caption is arranged during the vertical blanking period BL21 of the 21st line of the first field.

The video tape 4 is a demo tape used when the televideo 1 is displayed at a store. The above-mentioned brightness and volume setting value signals are written during the vertical blanking period BL20 of the twentieth line of the first field when the video tape 4 is created. This set value signal is a 4-bit code signal. For example, for demonstration use, "0001" is used, and for home use, "0010" is used as a home code. In this embodiment, a code “0100” indicating image division is added to an appropriate place. Note that this code is written twice consecutively during the vertical blanking period BL20 in order to avoid reading errors of the set value signal.

On the other hand, in the televideo 1, brightness and volume values for demonstration and brightness and volume values for home use are stored in a memory in the microcomputer 7 of the television circuit unit 3. . When the screen division code is read, an operation command for equally dividing the display on the CRT 8 into nine is stored in the memory of the microcomputer 7.

Next, the operation of the video display system having the above configuration will be described.

In the memory in the microcomputer 7 of the televideo 1, the brightness, volume and operation of the above-mentioned images for demonstration, home use, and screen division are set in advance at the time of factory shipment, and the initial setting of the televideo 1 is performed. Is set for home use (step S1). On the other hand, on the video tape 4 serving as a demotape, the storefront display code “0001” is inserted in each vertical blanking period BL20, and the screen division code “0100” is inserted in each vertical blanking period BL20 of the place where the screen is to be divided. I have.

A video tape 4 serving as a demo tape is inserted into the televideo 1 and reproduced (step S2). Then, the rotating head 5 reads the storefront display code “0001” and sends the code to the microcomputer 6 via the head amplifier 10, the high-pass filter 11 and the FM demodulator 12. The microcomputer 6 sends the code to the microcomputer 7 as it is. Then, the microcomputer 7 determines whether or not it is the shop display code "0001" (step S3). If the answer is Yes, the microcomputer 7 controls the color reproduction circuit 13 and the video amplifier circuit 14 to display the shop display brightness. Now, the volume is automatically switched to (step S4). In other words, it is brighter and louder than the home. Thereafter, when the power of the televideo 1 is turned off, the televideo 1 returns to the home setting which is the factory setting.

In this embodiment, when the video tape 4 is continuously reproduced, the screen division code “0100” is detected. Then, the microcomputer 6 transmits the information to the microcomputer 7, and the microcomputer 7 divides the screen of the CRT 8 into nine screens. At the time of this division, the broadcast screen selected by the tuner 15 of the televideo 1 is displayed in one block, the reproduced image of the video tape 4 in which the televideo 1 is reproduced is displayed in another block, and the remaining 7 blocks are displayed. A still image of another broadcast captured by the tuner 15 is displayed in one block.

In the embodiment described above, the storefront display code is recorded in the vertical blanking period BL20 of the 20th line of each first field in the television signal of the videotape 4. No matter where you start playback, the setting will always switch to the demo setting. In addition, since the screen can be divided, the demonstration effect can be surely improved.

The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention. It is. For example, the microcomputer 6 of the video cassette recorder circuit unit 2 may perform the final part of the detection determination of the set value signal instead of the microcomputer 7 of the television circuit unit 3. Further, the control of the color reproduction circuit 13 and the like may be performed by the microcomputer 6 instead of the microcomputer 7.

As the set value signal, in addition to the brightness and volume, other values related to color and brightness such as color density and hue, and other values related to sound such as sound quality may be adopted. . Further, the code representing the set value signal may be another code such as 8 bits in addition to 4 bits.

Further, instead of using a predetermined code for demonstration, home use, screen division, or the like, the set value signal may be a code that allows each value to be changed linearly. For example, a two-byte code may be used, and one byte may indicate the code, and the other one byte may indicate the value. For example, when the brightness code is “00000001” and its value is 33, it is “0000000100100001”. When the volume code is “00000010” and its value is 10, it is “0000000001000001010”. In the case of screen division, "00000100" is used as the code, and the display method is represented by the next 8 bits. For example, in the case of four divisions, "00000100" is set. In the case of 6 divisions, it is set to "00000110" instead. In this way, by recording a pair of the set value item and the set numerical value itself, various items can be switched linearly and automatically.

Also, instead of putting one code (one of the values of brightness and volume) into one video tape 4, it is also possible to put a code specifying a plurality of brightness and volume. good. For example, when it is better to make the image of the specific portion brighter than the normal demonstration brightness, the image is further added to the vertical blanking period BL20 of each first field containing the image signal. A plurality of brightnesses may be automatically set on one video tape 4 by inserting a code for increasing the brightness.

In addition to the vertical blanking period BL20 of the twentieth line, a place for inputting the set value signal is another vertical position not used for carrying significant information such as closed captions and teletext of each country. A blanking period or a horizontal scanning period not displayed on the CRT 8 may be used.

As the video medium, various video signal recording media such as a laser disk (LD), a digital video disk (DVD), and a video compact disk (CDV) can be employed in addition to the video tape. Further, as a video display device, in addition to the televideo 1, an image is displayed on the display unit using a video signal such as a combination of a video cassette recorder and a monitor, a combination of a CD, DVD, or CDV device with a monitor. If applicable, it can be applied to all video-related equipment.

[0043]

[Effect of the invention]

 As described above, in the video display device according to the first to fifth aspects, the brightness and the like of the image can be optimized according to the usage state and the image content, and the video display improves the appearance and the like. It can be a device. For this reason, if this device is displayed at stores, sales will improve.

In the video medium according to the sixth to eighth aspects, the display brightness and the like of a device on which the medium is reproduced are optimized according to the use state of the device and the image content in the medium. It can be. For this reason, the appearance of the equipment in which the medium is used is improved, and when the equipment is displayed in stores, sales are improved.

Further, in the video display system according to the ninth aspect, the brightness of the image and the like can be optimized according to the use state of the video display device and the image content of the video medium. And the images recorded on the medium become easier to see. For this reason, if the video display device constituting this system is exhibited at a store, the sales will be improved.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating an operation of the video display system according to the embodiment of the present invention.

FIG. 2 is a diagram for explaining a vertical blanking period of a television signal employed in the video display system of the present invention and a conventional television device.

FIG. 3 is a circuit block diagram showing a circuit configuration of a video display device used in the video display system of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tele video (video display device) 2 Video cassette recorder circuit part 3 Television circuit part 4 Video tape (video medium) 5 Rotating head (part of setting value reading part) 6 Microcomputer (part of setting value reading part) 7 Microcomputer (Control unit as part of the set value reading unit) 8 CRT (display unit)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H04N 7/087 7/088

Claims (9)

[Utility model registration claims] 1. A setting value reading section for reading a setting value signal for designating the brightness of an image, which is input to a video medium for recording a video signal, and an image display state based on the signal read by the setting value reading section. A video display device comprising: a control unit that changes the display state; and a display unit whose display state is controlled by the control unit. 2. The video medium is a video tape for exhibition, the set value reading unit is a rotary head that reads a signal of the video tape, and the control unit is a microcomputer that controls a television unit serving as a display unit. The video display device according to claim 1, wherein the video display device is a televideo. 3. The setting value signal is carried on a signal of a vertical blanking period following the horizontal scanning of the display unit, and the vertical blanking period in which significant information such as a text broadcast is not recorded is set as the vertical blanking period. 3. The video display device according to claim 1, wherein a period is used. 4. The video display device according to claim 1, wherein the set value signal is a signal relating to brightness of an image and a signal relating to a degree of volume output together with the image. 5. The apparatus according to claim 1, wherein a division code for dividing the display on said display unit is one of said set value signals, and said division code is readable by said set value reading unit. 5. The video display device according to 3 or 4. 6. A video, wherein a set value signal for designating at least the brightness of an image is recorded in a television signal displayed on a display unit of a device, among the elements for determining a display state of the display unit. Medium. 7. The video medium according to claim 6, wherein the set value signal includes a signal relating to a degree of a volume output together with an image. 8. The setting value signal is carried on a signal of a vertical blanking period following a signal for horizontally scanning a display unit of a video display device, and significant information such as teletext is recorded as the vertical blanking period. 8. The video medium according to claim 6, wherein a non-period is employed. 9. A video display system comprising the video display device according to any one of claims 1 to 5 and the video medium according to any one of claims 6 to 8. .