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Himax Technologies (HIMX -0.97%) put out some good numbers in the the third quarter. Total revenue and gross margins reached the top end of guidance, and the company's biggest revenue driver saw solid year-over-year growth.

However, investors are likely to temper that positive news with the company's disappointing fourth-quarter guidance. To find out what happened, let's take a look at what Himax's management had to say on the company's earnings call.

Revenues were at the top end of guidance

Himax Technologies President and CEO Jodan Wu said on the call that earnings per share (EPS), gross margins, and revenues were all in line with the company's reiterated guidance issued at the end of September. You might remember that after some downgrades from Wall Street analysts, the company reiterated its third-quarter guidance a few months ago. 

Gross margins came in at 25.6%, and non-GAAP EPS per diluted share was $0.12. The company's management also pointed out that revenue came in at $218.1 million, which was at the high end of the company's guidance and higher than some analysts' consensus of $216 million.

According to Wu, all product lines helped push up revenue in the quarter, bringing a 31.7% year-over-year gain:

Both the sequential and year-over-year growth was due to continual growth momentum across all our major product lines, driven by large panel driver IC sales benefiting from our leading market share in China and in 4K TV, better-than-expected smartphone driver IC sales and accelerating AR/VR related business from our leading US customer.

The company's largest revenue segment continues to grow

Himax has always relied on its small and medium-sized drivers to bring in the majority of its revenue, and that was still the case in the third quarter, as the segment accounted for 45.5% of total revenue.

The good news is that sales in this business grew by 17.8% year over year. Wu said strong sales from Himax's partners in China are keeping the small and medium driver business humming along:

Sales into smartphones came in better than guided to achieve low-single-digit growth sequentially and up more than 20% year-over-year, as we fulfilled some of the surging rush orders of late from Chinese end customers through securing additional capacity from our supply partners.

Wu added that China continues to be a bright spot for the company, saying, "The strong rebound of our smartphone driver IC business this year came from our long-standing leading market share in China where our end brand customers are performing strongly."

Things will likely slow down in the fourth quarter

Despite the progress in this quarter, management tempered some of the good news with a more sobering forecast for the fourth quarter. 

"The fourth quarter is typically a low season for the semiconductor industry. For the fourth quarter of 2016, we expect revenue to be down 4% to 9% sequentially. Gross margin is expected to be slightly down sequentially, depending on our final product mix," Wu said.

The slowdown will come from several company segments, including Himax's small, medium and large panel drivers.

Wu said large panel drivers will see some slowdown due to customer inventory adjustments, but he noted that, "Despite the temporary demand slowdown, our leading position in this segment remains intact."

Wu also said that while demand for small- and medium-sized drivers will remain strong, "fourth quarter sales for smartphones are likely to decline mid single digit sequentially due to the foundry capacity constraints."

So, while the third quarter outpaced some analysts' expectations and hit the high end of the company's guidance, investors should expect some of the continued volatility that we've seen with the company in the past. HiMax's management may be bullish on the company's future, but investors should remember that this company will still likely experience some instability along the way.