TWI757880B - Data conversion circuit for converting black-white or gray-level frame to color display panel/ module, and electronic device and color display device using the same - Google Patents

Abstract

A data conversion circuit device for converting a black-white or gray-level frame to a color display panel/ module includes: a data conversion unit for receiving input data of the black-and-white or gray scale frame provided by a controller/ microcontroller unit and converting the input data to a color frame data, so as to provide the color frame data to the color display panel/ module; wherein the data conversion circuit does not receive an input clock and generate a reference clock to adjust an output data rate of the color frame data.

Description

Data conversion circuit for converting black and white or grayscale image frame to color display panel/module display and electronic device and color display device using the same

The present invention relates to a data conversion circuit capable of converting black-and-white or grayscale image frames displayed by an existing electronic device to a color display panel/module display, as well as an electronic device and a color display device using the conversion device .

Existing home appliances, machine tools, processing machines, watches, computers or other electronic devices may use black and white or grayscale pixel displays or black and white liquid crystal displays (eg, black and white liquid crystal seven-segment displays or black and white dot matrix liquid crystal displays) to display some Therefore, the signal output by the above electronic device to the pixel display or the black and white liquid crystal display may be a plurality of black and white or grayscale pixel signals of a picture frame, a control signal, more than one string signal, more than one digital signal or more than one symbol signal. However, with the popularity of color displays (eg, color liquid crystal displays), the number of pixel displays or black and white liquid crystal displays that are produced has also decreased, making the manufacturing costs of pixel displays or black and white liquid crystal displays more expensive than that of color displays. Manufacturing costs are also high.

First, please refer to FIG. 1, the electronic device 1 of the prior art includes a controller/microprocessor 11 and a black and white liquid crystal display 12, wherein the controller/microprocessor 11 is electrically connected to the black and white liquid crystal display 12 (or Black and white or grayscale pixel display), and output control signal, digital signal, string signal or symbol signal to control the black and white liquid crystal display 12 to display black and white picture frames with corresponding information. For example, the electronic device 1 can be a local telephone device, and the controller/microprocessor 11 can control the black and white liquid crystal display to display numbers according to the touched keys. For another example, the electronic device 1 may be a processing machine, and according to its operation, the controller/microprocessor 11 outputs a control signal, a digital signal, a string signal or a symbol signal to control the black and white liquid crystal display 12 to display corresponding information. black and white frame. In addition, as mentioned above, the electronic device 1 may use a black and white or grayscale pixel display instead of the black and white liquid crystal display 12. At this time, the controller/microprocessor 11 outputs a plurality of black and white or grayscale pixels of a picture frame. signal to drive the pixel display to display black and white or grayscale image frames with corresponding information.

Next, please refer to FIG. 2, the color liquid crystal display screen 2 of the known technology (used as a color display panel/module) includes a timing controller 21, a source driver 22, a gate driver 23 and a liquid crystal display panel 24, The timing controller 21 is electrically connected to the source driver 22 and the gate driver 23 , and the liquid crystal display panel 24 is electrically connected to the source driver 22 and the gate driver 23 . The timing controller 21 can receive the color image frame signal, wherein the resolution of the color image frame signal generally corresponds to the resolution of the liquid crystal display panel 24. For example, if the resolution of the liquid crystal display panel 24 is 1024*968*3 pixels, enter the The resolution of the color picture frame signal to the timing controller 21 is 1024*968*3 pixels. The timing controller 21 controls the gate driver 23 to sequentially drive pixel transistors of a plurality of columns of the liquid crystal display panel 24, and controls the source driver 22 to send a plurality of pixel signals to the pixel transistors corresponding to the column.

From the description of FIG. 1 and FIG. 2 , it can be known that, due to the different data formats, the color liquid crystal display cannot be directly used to replace the pixel display or the black and white liquid crystal display. Therefore, when the pixel display or the black-and-white liquid crystal display of the above-mentioned electronic device is broken or faulty and needs to be replaced, it may be faced with a technical problem that the maintenance cost is relatively high.

Another embodiment of the present invention provides a data conversion circuit for converting a black-and-white or grayscale image frame to a color display panel/module display, including: a data conversion unit for receiving a data conversion circuit provided by a controller/microprocessor for Display the input data of black and white or grayscale image frames, and convert the input data into color image frame data, so as to provide the color image frame data to the color display panel/module; wherein the data conversion circuit does not receive Input clock and do not generate reference clock to adjust the output rate of color picture frame data.

In short, through the data conversion circuit provided by the embodiment of the present invention, a color display panel/module can be used to replace the black and white liquid crystal display and the pixel display. In addition, the data conversion circuit can be integrated with the color display panel/module to form a color display device, or integrated with the color display panel/module and the controller/microprocessor to form an electronic device.

1: Electronic device

11: Controller/Microprocessor

12: Black and white LCD monitor

2: Color LCD screen

21: Timing Controller

22: Source driver

23: Gate driver

24: LCD panel

2': Color display panel/module

3: Electronic device

30: Color display device

31: Data conversion circuit

FIG. 1 is a block diagram of a black-and-white liquid crystal display for displaying a black-and-white image frame in an electronic device of the prior art.

FIG. 2 is a block diagram of a color liquid crystal display screen of the prior art.

FIG. 3 is a block diagram of a data conversion circuit according to an embodiment of the present invention applied to an electronic device.

In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail by the following specific embodiments and the accompanying drawings. The description is as follows.

An embodiment of the present invention provides a data conversion circuit that can convert black and white or grayscale image frames displayed by an electronic device of the prior art to a color display panel/module display, so that even the pixel display of the electronic device of the prior art or If the black and white liquid crystal display is broken or malfunctioning, the existing color display panel/module (for example, color liquid crystal display can also be used as an intermediary interface through this data conversion circuit screen) to replace the broken or faulty pixel display or black and white liquid crystal display, so as to achieve the purpose and effect of reducing maintenance costs.

The data conversion circuit can convert multiple pixel signals of black and white or grayscale image frames into color image frame data, and directly provide the color image frame data to the color display panel/module to display the corresponding color image frame. The data conversion circuit has no driver, and does not receive the input clock and generate a reference clock, so when the input data of the data conversion circuit changes, the color display panel/module changes the displayed color image frame in an interruptive manner .

Furthermore, the common picture frame refresh rate of color display panels/modules is at least 30 picture frames per second, but the rate of input data output by the controller/microprocessor of the conventional electronic device is different from the common picture frame rate. The picture frame refresh rate does not correspond. Generally speaking, the rate of input data output by the controller/microprocessor may be relatively slow. Therefore, the method of the known technology is to generate the corresponding reference clock and increase the color picture frame data. Output rate, so that the output rate of color picture frame data is consistent with the common picture frame refresh rate. The data conversion circuit of the embodiment of the present invention does not receive an input clock and generate a reference clock to adjust the output rate of the color image frame data. When the input data received by the data conversion circuit changes, the color display panel/module will display the color of the existing color frame data before the color frame data of a new frame is completely received by the color display panel/module. A new color image frame will not be displayed until the color image frame data of a new image frame is completely received by the color display panel/module. Therefore, the color display panel/module will display a new color image frame in a manner similar to interruption. Change the displayed color frame. Although this method will cause the user to feel the discontinuity of the picture frame, the black and white liquid crystal display or pixel display of the electronic device in the known technology is mainly used to display information, so the user's feeling of the quality of the dynamic picture frame is not considered. , and it is not necessary to consider the user's feeling of the quality of the dynamic picture frame. Furthermore, the above method can use circuit elements with lower cost and lower processing speed, so that the manufacturing cost of the data conversion circuit of the embodiment of the present invention is not high, so the overall cost of the data conversion circuit and the color display panel/module will be much higher. Lower than existing black and white LCD and pixel displays.

After describing the inventive concept of the present invention, the details of each embodiment of the present invention will be further described. First, please refer to FIG. 3 , in the first embodiment, the electronic device 3 includes a controller/microprocessor 11 and a color display device 30 , wherein the controller/microprocessor 11 is electrically connected to the color display device 30 . The controller/microprocessor 11 is used to output a pixel signal of a black and white or grayscale image frame (ie, the input data output by the controller/microprocessor 11 to the data conversion circuit 31), and the pixel signal can be used to drive the pixel display to display A black and white or grayscale image frame with corresponding information.

The color display device 30 has a data conversion circuit 31 and a color display panel/module 2', wherein the conversion device 31 is electrically connected to the color display panel/module 2'.

The data conversion circuit 31 includes a plurality of circuit elements that are electrically connected to each other, and the plurality of circuit elements are configured as a data conversion unit to perform the actions to be performed by the data conversion circuit 31 described above or later. In addition, in the embodiment, the data conversion circuit 31 is integrated with the color display panel/module 2', but the invention is not limited to this, and the data conversion circuit 31 can also be used as the color display panel/module 2' and the controller/ A separate element that mediates the interface between microprocessors 11 .

The data conversion circuit 31 is used to convert the pixel signal of the black-and-white or grayscale image frame to convert the color gamut to obtain the corresponding color image frame data, wherein a plurality of circuit elements of the data conversion circuit 31 can be configured as a data conversion unit, And the data conversion unit may be a calculation unit, so as to realize the above-mentioned conversion of the pixel signal of the black-and-white or grayscale image frame to convert the color gamut. Furthermore, the data conversion circuit 31 itself does not receive the input clock and generate a reference clock to adjust the output rate of the color picture frame data so that the output rate of the color picture frame data corresponds to the common picture frame refresh rate (ie, the data conversion circuit 31 ). There is no driver for receiving the input clock and generating the reference clock), so when the input data of the data conversion circuit 31 changes, the color display panel/module 2 ′ changes the displayed color picture frame in an interrupted manner.

To sum up, the embodiments of the present invention provide a data conversion circuit, which can convert black and white or grayscale image frames displayed by an electronic device of the known technology into a color display panel/module display. Therefore, when the known technology When the pixel display or the black and white liquid crystal display of the electronic device is damaged or malfunctions, it can be Using the data conversion circuit as an intermediary interface, the existing color display panel/module (eg, color LCD display) can be used to replace the broken or faulty pixel display or black and white LCD, thereby reducing maintenance costs. with effect. Furthermore, the data conversion circuit can be integrated into the existing color display panel/module to form a color display device, which can be directly used for replacing the pixel display or the black and white liquid crystal display of the conventional electronic device. In addition, if the controller/microprocessor of the electronic device of the known technology (such as: home appliance, machine tool, processing machine, watch or computer, that is, an electronic device with a screen for operation or display), the present invention is implemented. The data conversion circuit of the example is integrated with the existing color display panel/module into a new electronic device, which can reduce the manufacturing cost.

The present invention has been disclosed above with preferred embodiments, but those skilled in the art should understand that the above embodiments are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to those of the foregoing embodiments should be considered to be included within the scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the patent application.

11: Controller/Microprocessor

2': Color display panel/module

3: Electronic device

30: Color display device

31: Data conversion circuit

Claims (7)

A data conversion circuit for converting black and white or grayscale image frames to a color display panel/module display, comprising: a data conversion unit for receiving a controller/microprocessor for displaying black and white or grayscale image frames input data, and convert the input data into color image frame data to provide the color image frame data to the color display panel/module; wherein the data conversion circuit does not receive the input clock and does not generate reference clock to adjust the output rate of the color picture frame data. The data conversion circuit of claim 1, wherein the data conversion unit is a computing unit configured by a plurality of circuit elements. The data conversion circuit of claim 1, wherein the data conversion circuit performs color gamut conversion on input data for displaying black and white or grayscale image frames, from a grayscale color gamut to a color color gamut, and generates the color map frame data. The data conversion circuit of claim 1, wherein when the input data of the data conversion circuit changes, the color display panel/module changes the displayed color picture frame in an interruptive manner. A color display device, comprising: the data conversion circuit according to one of claims 1 to 4; and the color display panel/module electrically connected to the data conversion circuit. An electronic device, comprising: the data conversion circuit according to one of claims 1 to 4; the color display panel/module electrically connected to the data conversion circuit; and The controller/microprocessor electrically connected to the data conversion circuit is used for generating the input data. The electronic device according to claim 6, wherein the electronic device is a home appliance, a machine tool, a processing machine, a watch, a computer, or an electronic device with a screen for operation or display.

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