Light emitting display apparatus generating variable driving frequency based on image and current change amount
A light emitting display apparatus includes an analyzing circuit for analyzing at least one of image change amount and current change amount by analyzing input image data, and generating a driving frequency control signal according to analysis results, a control signal generator for generating driver control signals for changing a period of outputting data voltages according to the driving frequency control signal, transmitting a gate control signal of the driver control signals to a gate driver, and transmitting data control signals of the driver control signals to a data driver, and a data aligning circuit for generating image data by rearranging the input image data transmitted from the analyzing circuit according to a structure of a light emitting display panel, and outputting the image data to the data driver.
1. A light emitting display apparatus comprising:
an analyzing circuit configured to analyze at least one of image change amount and current change amount by analyzing input image data, and to generate a driving frequency control signal according to analysis results;
a control signal generator circuit for generating driver control signals for changing a period of outputting data voltages according to the driving frequency control signal, transmitting a gate control signal of the driver control signals to a gate driver, and transmitting data control signals of the driver control signals to a data driver; and
a data aligning circuit for generating image data by rearranging the input image data transmitted from the analyzing circuit according to a structure of a light emitting display panel, and for outputting the image data to the data driver,
wherein the analyzing circuit comprises a scaler provided in a control driver together with the control signal generator and the data aligning circuit or configured to change image information received through a communication network into a signal recognizable by the control driver.
2. The light emitting display apparatus according to claim 1 , wherein the analyzing circuit analyzes the image change amount and the current change amount by comparing input image data of at least two frames.
3. The light emitting display apparatus according to claim 1 , wherein the analyzing circuit analyzes the image change amount by comparing input image data of at least two frames, and analyzes the current change amount by using a current received from pixels included in the light emitting display panel.
4. The light emitting display apparatus according to claim 1 , wherein the control signal generator generates the driver control signals for increasing or decreasing a blank period which is provided between display periods for outputting an image and is configured not to output an image.
5. The light emitting display apparatus according to claim 1 , wherein the control signal generator generates the driver control signals for increasing or decreasing the size of the display period configured to output an image according to the driving frequency control signal.
6. The light emitting display apparatus according to claim 1 ,
wherein, when the current change amount is greater than or equal to a preset reference current change amount and a present driving frequency is greater than or equal to a preset reference driving frequency, the analyzing circuit generates the driving frequency control signal for maintaining the present driving frequency, and
when the current change amount is greater than or equal to the preset reference current change amount and the present driving frequency is less than the preset reference driving frequency, the analyzing circuit generates the driving frequency control signal for increasing the driving frequency.
7. The light emitting display apparatus according to claim 6 , wherein the analyzing circuit generates the driving frequency control signal for maintaining the present driving frequency when the current change amount is smaller than the preset reference current change amount, the present driving frequency is smaller than the preset reference driving frequency and the image change amount is smaller than a preset reference image change amount.
8. The light emitting display apparatus according to claim 6 , wherein the analyzing circuit generates the driving frequency control signal for maintaining the present driving frequency when the current change amount is less than the preset reference current change amount, the present driving frequency is smaller than the preset reference driving frequency, the image change amount is greater than or equal to a preset reference image change amount, and it is determined that an output position of the image is repeatedly shifted in the light emitting display panel.
9. The light emitting display apparatus according to claim 6 , wherein the analyzing circuit generates the driving frequency control signal for increasing the present driving frequency when the current change amount is less than the preset reference current change amount, the present driving frequency is smaller than the preset reference driving frequency, the image change amount is greater than or equal to a preset reference image change amount, and it is not determined that an output position of the image is repeatedly shifted in the light emitting display panel.
10. The light emitting display apparatus according to claim 6 , wherein the analyzing circuit generates the driving frequency control signal for decreasing the driving frequency when the current change amount is less than the preset reference current change amount, the present driving frequency is greater than or equal to the preset reference driving frequency, and the image change amount is less than a preset reference image change amount.
11. The light emitting display apparatus according to claim 6 , wherein the analyzing circuit generates the driving frequency control signal for decreasing the driving frequency when the current change amount is less than the preset reference current change amount, the present driving frequency is greater than or equal to the preset reference driving frequency, the image change amount is greater than or equal to a preset reference image change amount, and it is determined that an output position of the image is repeatedly shifted in the light emitting display panel.
12. The light emitting display apparatus according to claim 6 , wherein the analyzing circuit generates the driving frequency control signal for maintaining the present driving frequency when the current change amount is less than the preset reference current change amount, the present driving frequency is greater than or equal to the preset reference driving frequency, the image change amount is greater than or equal to a preset reference image change amount, and it is not determined that an output position of the image is repeatedly shifted in the light emitting display panel.