A driving method and device for a display element

Abstract

The invention discloses a driving method and device for a display element, belonging to the technical field of LED driving chips. Aiming at the problems existing in the prior art that a large bit width requires a large chip area when the driving current is generated, and the display effect is not good when the bit width is small, the present invention provides a driving method and device for a display element, which divides the bit width into high bits There are two parts of bit width and low bit width. The high bit width is controlled by analog mode, and the low bit width is controlled by digital mode to realize the increase of the weight of the output gray level current. When the gray level is increased, the digital control method avoids the area increase of the chip. Large, which significantly increases the upper limit of the current gray level, and at the same time refines the low gray level, which can improve the accuracy and range of the gray level current without affecting the chip area.

Description

technical field [0001] The present invention relates to the technical field of LED driving chips, and more specifically, to a driving method and device for a display element. Background technique [0002] As a new type of user interaction system, LED display has the characteristics of low power consumption, long life and low cost, and has been generally recognized by the market. With the development of LED technology, LED display screens can display more delicate images, and at the same time, it has been possible to drive LED lamp beads to emit light at a lower current, so as to meet the pursuit of lower power consumption. In the LED display system, the gray level is an important index to measure the clarity of the LED image. The gray level can be used to adjust the difference between the brightness and darkness of the display pixels, so as to achieve a more realistic image requirement. [0003] In the design of LED driver chips, the level of grayscale current is generally ...

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Problems solved by technology

[0006] Aiming at the problems in the prior art that the bit width of the grayscale data generated by the driving current is large, the chip area is large, and the display effect is not good when the bit width is small, the present invention provides a driving method and device for a display element, which increases the bit width It is divided into two parts: high bit width and low bit width. The high bit width is controlled by analog mode, and the low bit width is controlled by digital mode. When the gray level is increased, the digital control method avoids the increase of the chip area, and the low bit signal is split to achieve Improvement of uniformity and linearization of low gray signal

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