JPH0822034B2 - Image quality adjustment device - Google Patents

Description

The present invention relates to an image quality adjusting device for adjusting the contrast, brightness, etc. of a television receiver or the like.

[Prior Art] Conventionally, as an apparatus of this type, there is one shown in FIG. 3 by taking a television receiver as an example. 1 is a microcomputer (hereinafter referred to as a microcomputer) as a digital signal processing circuit for controlling various functions such as tuning of a receiving unit and decoding control of a remote control signal, 2 is a non-volatile memory,
Reference numeral 3 is an image quality adjusting circuit in which a plurality of image quality setting elements such as contrast and brightness are controlled by the microcomputer 1, 4 is a sound quality adjusting circuit in which sound quality is similarly controlled by the microcomputer 1, and 5 is an operation for controlling image quality and sound quality. Keys, 6 are indicators of a display for displaying a video signal, and 7 is a speaker for generating sound.

Next, the operation will be described. In a display device which is a television receiver controlled by the microcomputer 1, when adjusting the image quality and sound quality, the microcomputer 1 determines which operation key is pressed by operating the main body of the display device or the remote controller operation key 5. An image quality control signal for adjusting the image quality setting element and a sound quality control signal for adjusting the sound quality are sent to the image quality adjusting circuit 3 and the sound quality adjusting circuit 4, respectively. Therefore, the image quality adjusting circuit 3 adjusts the input video signal according to the image quality control signal by, for example, increasing or decreasing the brightness, making the color darker or lighter, and increasing or decreasing the contrast to display the image. The adjusted video signal is sent to the device 6 and displayed. Further, the sound quality adjustment circuit 4 adjusts the input audio signal to the speaker 7 by adjusting, for example, raising and lowering a low frequency component and raising and lowering a high frequency component according to the sound quality control signal. Send as a voice signal and output as voice.

Here, the non-volatile memory 2 is a general data memory, and the channel data of the Delevi station and the information of the display device before the power is turned off (commonly known as last one memory)
Is a storage device for storing and reading out at a suitable time.

[Problems to be Solved by the Invention] Since the conventional display device is configured as follows, when the viewer wants to change the image quality or the sound quality, he or she handles the operation keys to determine the color, contrast, Regarding brightness (also referred to as bright), sharpness (also referred to as sharpness), and sound quality, it is time-consuming and inconvenient to adjust each of the bass and treble.

Therefore, an object of the present invention is to provide an image quality adjusting device capable of collectively adjusting the image quality.

[Means for Solving the Problems] The present invention made in view of the above object includes a plurality of image quality adjusting circuits for respectively adjusting a plurality of image quality setting elements such as contrast and brightness for setting image quality by image quality control signals. ,
A storage device for storing digital data corresponding to the image quality control signal for adjusting the image quality setting element for each of the image quality setting elements, an operation key for reading the digital data stored in the storage device, and an operation key for operating the operation key. And a D / A conversion circuit that converts the read digital data into an analog signal and outputs an image quality control signal to the image quality adjustment circuit, wherein the storage device is provided with a plurality of preset desired image quality. A plurality of sets of digital data are stored, with each set of digital data corresponding to each image quality control signal for adjusting the image quality setting element of, and the plurality of sets of digital data of the plurality of sets are stored by operating the operation keys. One set is read out in a batch, and the plurality of image quality adjustment circuits adjust the image to one of the desired image quality.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 8 is a video circuit including a Y / C separation circuit for processing a video signal in a front stage or a rear stage of the image quality adjustment circuit 3 and separating it into a luminance signal and a color signal, a video circuit including a color synchronization circuit, a color demodulation circuit, and the like. Deflection high voltage circuit that controls the deflection and high voltage of the display 6, 10 is a power amplifier that drives a speaker, 11 is a digital signal corresponding to the image quality and sound quality control signals for controlling the adjustment circuits 3 and 4 from the microcomputer 12. D / A to convert to analog signal
The converter 13 is a menu memory that stores a plurality of the digital signal data. In the menu memory 13, a plurality of digital signal data corresponding to the image quality control signal for adjusting each image quality setting element and a plurality of digital signal data corresponding to the voice control signal are included in each menu data A to. They are collectively stored for each D. The same parts as those in FIG. 3 are designated by the same reference numerals, and the description of those parts will be omitted.

Next, the operation of the present invention will be described with reference to FIG. First, FIG. 2 (A) shows a schematic diagram of data to be stored as collective video data. Here, the image quality adjusting circuit 3 is provided with means for adjusting the image quality setting factors such as sharpness, contrast, color, tint (color tone), and brightness. Therefore, for example, the stage of each image quality setting element of the image quality showing "glittering image" is set as the degree shown by the solid line in the figure, and digital data corresponding to the image quality control signal of each image quality setting element is supplied to the digital signal processing circuit by the microcomputer 12. Is stored in the menu memory 13 as the video menu data A. Next, the stage of each quality setting element of the image quality showing "natural image" is set as the degree shown by the dashed line in the figure, and the digital data for each image quality setting element is set in the menu memory through the microcomputer 12.
It is stored in 13 as video menu data B. Similarly, the "soft image" is shown by a thick line and the "calm image" is shown by a dotted line, and is stored in the menu memory 13 as the image menu data C and D, respectively.

Further, FIG. 2 (B) shows a schematic diagram of data stored as collective sound quality data. Here, the sound quality adjustment circuit 4 is provided with means for adjusting the frequency characteristics, for example. Therefore, the frequency characteristic of the sound quality indicating "dynamic sound" is set as the degree indicated by the solid line in the figure. The data of the control signal indicating the "dynamic sound" is stored as voice menu data A in the menu memory 13 through the microcomputer 12 as a digital signal corresponding to the sound quality control signal. For softness, "soft sound" is indicated by a bold line, "natural sound" is indicated by a dot-dash line, and "closed sound" is indicated by a dotted frequency characteristic, and stored in the menu memory 13 as voice menu data B, C, D respectively. deep.

Therefore, an operation key corresponding to each menu data of the menu memory 13 is provided as a part of the operation key 5 or as an alternate key. For example, when the image menu A key of the operation key 5 is pressed, the microcomputer 12 senses that the key of the image menu A is pressed, and is stored in advance as the image menu data A from the menu memory 12 corresponding to the key. Digital data corresponding to the image quality control signal for each image quality setting element is collectively read and the data is read by the D / A converter 11
To the analog signal by the D / A converter 11 and controlling the image quality adjusting circuit 3 so that the sharpness, contrast, color, etc. shown by the solid line in FIG. Adjust the video signal to the image quality that shows the "glittering image" of the degree of presence. Then, the video signal is displayed on the display 6 through the video circuit 8 and the deflection high voltage circuit 9. As a result, preset image quality setting elements such as sharpness, contrast, color, tint, and blind shown by the solid line in FIG. 2 (A) are collectively adjusted, and an image showing a “glittering image” is visualized. .

Similarly, when the image menu B, C, or D of the operation key 5 is operated, the display unit 6 displays the "natural image", "soft image", and "calm image" of the respective image qualities corresponding to the operated key. Image showing "image" is displayed.

Further, regarding the voice, when the sound quality of the frequency characteristic which is the "dynamic sound" shown by the solid line in FIG. 2B is desired, if the key of the voice menu A of the operation key 5 is pressed,
The microcomputer 12 detects the key-on, reads the digital data corresponding to the sound quality control signal previously stored as the voice menu data A of the menu memory 13 corresponding to the key, and transmits the data to the D / A converter 11, The analog signal is converted by the D / A converter 11 and the sound quality adjustment circuit 4 is controlled to adjust the sound signal to the desired sound quality of "dynamic sound" having the frequency characteristic indicated by the solid line in FIG. 2 (B). To do. Then, the audio signal drives the speaker 7 through the power amplifier 10 to generate an audio that expresses "dynamic sound".

Similarly, if a key of the operation keys 5 corresponding to "soft sound", "natural sound", and "closed sound" indicating sound quality is pressed, the same operation is performed.

In the above embodiment, the image quality and the sound quality are separately stored in the menu memory. However, for example, the “glittering image” of the image quality and the “dynamic sound” of the sound quality are collectively stored in the menu memory. It should be noted that obtaining the desired image quality and sound quality with one push of the operation key is easily obtained by the signal processing in the digital signal processing circuit, and the desired viewing effect can be obtained by a useful and simple operation. You can

[Effects of the Invention] As described above, according to the present invention, a plurality of sets of digital data corresponding to respective image quality control signals for adjusting a plurality of image quality setting elements are stored in order to obtain a plurality of desired image quality. Since one set of each digital data is read out at once, one of a plurality of desired image quality can be easily and instantly obtained. Further, since the data for adjusting the image quality setting element is stored as digital data, it is easy to manage and change the data.

[Brief description of drawings]

FIG. 1 is a block diagram showing a control device according to an embodiment of the present invention, and FIG. 2 is a schematic diagram for explaining the operation of FIG.
FIG. 3 is a block diagram showing a conventional control device. 1,12 ... Microcomputer 3 ... Image quality adjustment circuit 4 ... Sound quality adjustment circuit 5 ... Operation keys 6 ... Display 7 ... Speaker 13 ... Menu memory

Claims (1)

[Claims] 1. A plurality of image quality adjusting circuits for respectively adjusting a plurality of image quality setting elements such as contrast and brightness for setting image quality by an image quality control signal, and for adjusting each of the image quality setting elements. A storage device that stores digital data according to the image quality control signal, an operation key that reads the digital data stored in the storage device, and an analog conversion of the digital data that is read by the operation of the operation key to adjust the image quality. And a D / A conversion circuit for outputting an image quality control signal to the circuit, wherein the storage device has image quality control for adjusting a plurality of image quality setting elements to obtain a plurality of preset desired image quality. A plurality of sets of digital data are stored with each set of digital data corresponding to a signal, and the plurality of sets of digital data are operated by operating the operation keys. Image quality adjustment device being characterized in that so as to be adjusted to read collectively set the one of the plurality of desired image quality by the plurality of image quality adjustment circuit.