Panel-type image display device and liquid crystal television

Abstract

A panel-type television whose colors and image qualities of OSD portions are kept intact and the qualities of images other than the OSD portions are adjusted is provided. The panel-type television includes an image quality adjustment circuit 30a that performs a specified image quality adjustment processing on input image signals; a delay circuit 30b that delays input image signals by the time needed for the image quality adjustment circuit 30a to perform image quality adjustment processing; and a switching 30c that switches between the image quality adjustment circuit 30a and the delay circuit 30b so that image signals are input to either of the circuits according to the control of a microcomputer 60, wherein the microcomputer 60 inputs image signals for OSD display areas to the delay circuit 30c and image signals other than those for OSD display areas to the image quality adjustment circuit 30a.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

It is to be understood that the drawings are to be used for the purposes of exemplary illustration only and not as a definition of the limits of the invention. Throughout the disclosure, the word “exemplary” is used exclusively to mean “serving as an example, instance, or illustration.” Any embodiment described as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

Referring to the drawings in which like reference character(s) present corresponding parts throughout:

FIG. 1 is an exemplary illustration of a block schematic diagram of a panel-type television in accordance with one embodiment of the present invention;

FIG. 2 is an exemplary illustration of a block schematic diagram of an image quality adjustment section;

FIG. 3 is an exemplary illustration of a flow chart of the image quality adjustment processing;

FIG. 4 is an exemplary illustration of one example of an OSD display screen;

FIG. 5 is an exemplary illustration of another example of an OSD display screen;

FIG. 6 is an exemplary illustration of another example of an OSD display screen;

FIG. 7 is an exemplary illustration of another example of an OSD display screen;

FIG. 8 is an exemplary illustration of another example of an OSD display screen; and

FIG. 9 is an exemplary illustration of a modified example of the flow chart of the image quality adjustment processing.

Claims

1. A liquid crystal television comprising: a liquid crystal module that displays images on a screen of the liquid crystal module;a tuner that extracts TV broadcast signals of a channel selected from a TV broadcast signals received by an antenna and outputs the extracted signals;a scaler large scale integration (LSI) equipped with: a decoder that separates image signals and audio signals from input TV signals, and simultaneously decodes the image signals and extracts amounts of three primary color signal components, that is, amounts of R (red), G (green), and B (blue) components; a scaler that generates image data for one frame to be displayed in the liquid crystal module after performing scaling processing on input image signals in order to match the input image signals to a pixel number of the screen of the liquid crystal module; and an on-screen display (OSD) processing section that generates still images and superimposes the still images onto image signals after being supplied with data used to generate OSD signals;an image quality adjustment circuit that performs a specified image quality adjustment processing on the image signals input by the scaler LSI, and outputs the processed image signals to the liquid crystal module; anda microcomputer that controls the tuner, the scaler LSI, and the liquid crystal module, and simultaneously supplies an OSD processing section with data used to generate OSD signals,the liquid crystal television further including:a delay circuit that delays the image signals output by the scaler LSI by a time needed for the image quality adjustment circuit to perform image quality adjustment processing; anda switch that switches a connection between the image quality adjustment circuit and the delay circuit according to a control of the microcomputer so that the image signals are output from either of the image quality adjustment circuit or the delay circuit,the OSD processing section generates OSD signals used to display rectangular OSDs on the screen after being supplied with data used to generate OSD signals by the microcomputer and outputs the OSD signals superimposed onto the image signals; andthe microcomputer generates information about OSD display area from a data used to generate the OSD signals after controlling the OSD processing section in order for OSDs to be displayed; controls the switch in order for the delay circuit to be connected so that the image signals for OSD display areas of the signals output by the scaler LSI are output without qualities of the image signals being adjusted; controls the switch in order for the image quality adjustment circuit to be connected so that the image signals that are not for the OSD display areas are output with the qualities of the image signals being adjusted; and displays the OSD images without the qualities of the image signals being adjusted and the images other than the OSD images with qualities of the image signals being adjusted on the screen of the liquid crystal module.

2. A panel-type image display device, comprising: an image signal output unit that performs a specified image signal processing on input image signals and outputs a processed image signals;an image quality adjustment section that performs a specified processing on image signals output by the image signal output unit; anda panel-type display on which images based on the image signals output by the image quality adjustment section,the panel-type image display device further including a rectangle discrimination unit that can discriminate between image signals to be displayed inside a specified rectangular area on the panel-type display and image signals to be displayed outside the specified rectangular area and also can output discrimination signals;the image quality adjustment section has an image quality adjustment circuit, a delay output circuit, and a switching device; andthe image quality adjustment circuit receives image signals output by the image output unit and performs a specified image processing on the image signals;the delay output circuit receives image signals output by the image signal output unit and delays the image signals by the time needed for the image quality adjustment circuit to perform image quality adjustment processing without performing any image quality adjustment on the image signals and outputs the delayed image signals; andthe switching device switches between the image quality adjustment circuit and the delay output circuit so that image signals output by the image signal output unit pass through either the image quality adjustment circuit or the delay output circuit according to discrimination signals output by the rectangle discrimination unit.

3. A panel-type image display device according to claim 2, wherein: the image signal output unit has a function to generate on-screen display signals that are displayed in a rectangular box and output the on-screen display signals superimposed onto the image signals; andthe rectangle discrimination unit discriminates the inside area of the rectangular box for the on-screen display signals as the rectangular area.

4. A panel-type image display device according to claim 3, wherein: the switching device connects image signals that are input to the image quality adjustment section to the delay output circuit when the image signals are to be displayed on the rectangular area; andthe switching device connects image signals that are input to the image quality adjustment section to the image quality adjustment circuit when the image signals are to be displayed outside the rectangular area.

5. A panel-type image display device according to claim 2, wherein the rectangle discrimination unit has a function to discriminate multiple rectangular areas.

6. A panel-type image display device according to claim 2, wherein the rectangle discrimination unit discriminates a logical sum of all the rectangular areas when discriminating multiple rectangular areas.

7. A panel-type image display device according to claim 2, wherein the rectangular areas are non-image areas located in both right and left outsides of an image display area.

8. A panel-type image display device according to claim 2, wherein the rectangular areas are non-image areas located in both upper and lower outsides of an image display area.

9. A panel-type image display device according to claim 2, wherein the panel-type display is a liquid crystal module on a screen of which images are displayed.

10. A panel-type image display device according to claim 2, wherein the panel-type display is a plasma display panel-type module on a screen of which images are displayed.

11. A panel-type image display device according to claim 2, wherein: the image signal output unit has a function to output an image display area surrounded by a rectangular box; andthe rectangular discrimination unit discriminates the inside area of the rectangular box of the image display area as the rectangular area.

12. A panel-type image display device according to claim 11, wherein: image signals input to the image quality adjustment section are connected to the image quality adjustment circuit when the image signals are to be displayed on the rectangular area; andimage signals input to the image quality adjustment section are connected to the delay output circuit when the image signals are to be displayed outside the rectangular area.