Imaging device
To determine a deterioration and maintain a high-quality image without unevenness of brightness by performing a precise correction, a detection scanning line for selecting a pixel which detects a deterioration of a pixel, a detection line for informing the outside of the display area of the property of a pixel selected for detecting the deterioration, a deterioration determination means for determining a deterioration amount based on a voltage corresponding to a current detected by the detection line, and a deterioration correction means (computation circuit) for reflecting the determination result of the deterioration determination means in image data supplied to the pixel, are provided.
1. An imaging device having a display area wherein plural pixels comprising self-luminous light elements are disposed at intersections of display scanning lines and signal lines, a display scanning circuit for applying a scanning signal to the display scanning lines, a signal drive circuit for supplying image data to the signal lines, and a power supply circuit for supplying current to the pixels, the device comprising:
detection scanning lines that select pixels to detect a deterioration of an image;
detection lines that inform the outside of the display area of the property of the selected pixels;
deterioration determination means that detects the property of the pixels via the detection lines and determines a deterioration amount based on the detected signal; and
deterioration correction means that reflects the determination result of the deterioration determination means in image data supplied to and displayed by the pixels, wherein
the display area includes a plurality of blocks arranged along the display scanning lines and the signal lines, each of the plurality of blocks being composed of a plurality of pixels selected by adjacent scanning lines and adjacent signal lines,
the deterioration determination means is configured to calculate a first deterioration determination reference value corresponding to a first block of the plurality of blocks for determining a first deterioration of pixels in the first block and a second deterioration determination reference value corresponding to a second block of the plurality of blocks for determining a second deterioration of pixels in the second block,
the deterioration determination means detects a first property of the pixels in the first block and determines a first deterioration amount based on the first property by using the first deterioration determination reference value,
the deterioration determination means detects a second property of the pixels in the second block and determines a second deterioration amount based on the second property by using the second deterioration determination reference value, and
the deterioration correction means reflects the first deterioration amount as the determination result of the deterioration determination means in the image data supplied to and displayed by the pixels in the first block and the second deterioration amount as the determination result of the deterioration determination means in the image data supplied to and displayed by the pixels in the second block.
2. The imaging device according to claim 1 ,
wherein the deterioration determination means detects voltage values corresponding to properties of pixels forming the respective blocks, and
wherein the determination reference value is a minimum value among the voltage values.
3. The imaging device according to claim 1 ,
wherein the deterioration determination means detects voltage values corresponding to properties of pixels forming the respective blocks, and
wherein the determination reference value is a maximum value among the voltage values.
4. The imaging device according to claim 1 ,
wherein the deterioration determination means detects voltage values corresponding to properties of pixels forming the respective blocks, and
wherein the determination reference value is an average value among the voltage values.
5. The imaging device according to claim 1 , wherein the imaging device has a pixel that belongs to a plurality of blocks among adjacent blocks in the display area.
6. The imaging device according to claim 1 ,
wherein the deterioration detection means includes:
a voltage detection circuit that detects a voltage value corresponding to the property of the pixels detected outside the display area via the detection lines;
a first memory that stores the voltage value detected by the voltage detection circuit; and
a determination circuit that calculates the determination reference value based on the voltage value stored in the first memory and determines the deterioration amount by comparing the calculated determination reference value with the voltage value of a deterioration determination pixel,
wherein the deterioration correction means includes:
a second memory that stores the deterioration amount of the pixels stored in the first memory;
a computation circuit that corrects externally input image data by the deterioration amount stored in the second memory;
a latch circuit that holds the image data corrected by the computation circuit; and
a digital/analog converter that converts the image data held by the latch circuit to analog data, and supplies it to the data lines.